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All About Sewing Machines
Описание: All About Sewing Machines Prior to the invention of sewing machines, clothes and other materials were sewn by hand. Hand sewing is an art form that was practiced over 20,000 years ago. During those days, sewing needles made of bone or animal horns and thread made of animal sinew were used. In the beginning of 14th century, iron needles were invented and later in the 15th century eyed needles were introduced. It is believed that the first known attempt for a workable sewing machine was framed in 1790 by Thomas Saint. In 1800, sewing machine was invented and by the mid-nineteenth century it became popular among the public. After Thomas Saint, various attempts were made for inventing a sewing machine. But, all of them turned unsuccessful. In 1830, Barthlemy Thimonnier-a French tailor- came out with the first functional sewing machine. It used only one thread and a hooked needle for a chain stitch. Later in 1834, Walter Hunt came with an idea for double-thread sewing machine and it was regarded as America's first successful sewing machine. The machine devised by Walter Hunt was a straight-seam sewing machine that used reciprocating eye-pointed needle and an oscillating shuttle. Following Walter Hunt, Elias Howe developed a machine which had the same features as that of Hunt's sewing machine. After Elias Howe, Isaac Merit Singer patented a similar machine and was regarded as the first commercially successful machine. Singer's machine included a straight eye-pointed needle and transverse shuttle, a table to support the cloth horizontally, a vertical presser foot to hold the material against the upward stroke of the needle, and an overhanging arm to hold the presser foot. Instead of a hand crank, Singer's machine used a foot treadle similar to that of a spinning wheel. Helen Augusta Blanchard, Allen Wilson, John Bradshaw, Charles Miller, and James Edward Allen Gibbs were the other contributors who produced a remarkable framework for sewing machines. Types of Sewing MachinesThere are three types of sewing machines- mechanical sewing machines, electronic sewing machines, and computerized sewing machines. Since their introduction in 1800 till 1960's, all sewing machines were mechanical. Mechanical sewing machines are controlled by a rotary wheel. They have knobs and dials to make changes in the tension or the length or width of the stitch. Lockstitch sewing machines make use of a hook and a bobbin thread to create stitch patterns, whereas chain stitch machines use a looper to form stitches. One of the major drawbacks of chain stitching is that it is very weak and the stitch can easily be pulled apart. In addition to lock stitching and chain stitching machines, there are blind stitch and buttonhole-and-button-sewing machines that use a spreader to create stitches. Mechanical sewing machines are less expensive and are the simplest type of sewing machine in terms of build. Bernina 1008, Kenmore 11101, Singer 6038, Elna 2005, Kenmore Mini, Kenmore 15212, and Sears Kenmore 15218 are some of the mechanical sewing machines available in the market. By the year 1970, electronic sewing machines became popular. There are more features in an electronic sewing machine than in a mechanical sewing machine. Instead of turning knobs or dials, electronic sewing machines use button to adjust length or width of the stitch. Electronic sewing machines have motors; each one is assigned with a specific task and is run by electricity. Singer 7442, Singer 7462, Singer CE-100 Futura, Elna 3230, and Janome Decor Excel 5124 are some instances of electronic sewing machines. Another type is the computerized sewing machine, which is very fast and easy to use. Computerized sewing machines are similar to electronic sewing machines. They use the same chips and stepper motors that are used in electronic machines. Besides, they posses a microprocessor which helps the sewing machine to accept new information in a card form and create stitching patterns based on the information loaded in the card. Singer CE-200 Quantum Futura, Singer Quantum XL-6000, Brother SE270D, and Janome 8080 are some examples of computerized sewing machine. Vintage Sewing MachinesSewing machine is one of the key inventions that have helped to shape the modern world. There are many popular vintage sewing machines. Most popular vintage sewing machine companies trading over the Internet are Bradbury, Singer, Jones, Frister and Rossmann. Vintage sewing machines are both collectible and usable. Old sewing machines are still popular because they are well-engineered, well-made workhorses. The value of a vintage sewing machine is great. There are a number of variables involved in determining the value of an old sewing machine; they are condition and completeness of the machine, rarity of the machine and geographic location of the machine. Most vintage sewing machines date back to the beginning of the 1900's. Most of them are still very popular. Singer machine models 301A, 221 Featherweight and 66 are the popular vintage sewing machines. Of these, the Singer Featherweight 221 is a classic model manufactured by the company between 1933 and 1964. It is a 'collectible' of the first order and is featured on many Web pages which cater to antique sewing machine collectors. Vintage sewing machines can be bought from stores or antique shops. Some suppliers of vintage sewing machines offer certificates of guarantee, or even warranties. Before buying a vintage machine, check for authenticity and buy only from trustworthy sellers. Online auctions are dangerous places to buy expensive vintage sewing machines. As buyers don't know anything about the seller, they may cheat in the course of dealing. There are many helpful sites on the Internet providing relevant information about vintage sewing machines. EBay is popular among vintage sewing machine collectors. Many individuals are now using vintage sewing machines as decorative pieces at home. They may be well-placed in a hallway, entryway, or a family room to showcase the beautiful craftsmanship. So if you possess a vintage sewing machine, take good care of it by consulting an antique dealer to find out the proper way to clean and maintain it. Vintage sewing machines are always an asset for future generations. Choosing the right concrete mixerA concrete mixer is a machine that homogeneously mixes cement, aggregates such as sand or gravel, and water to form concrete. A concrete mixer uses a rotating drum to mix the components. For small jobs, mobile concrete mixers are often used to make the concrete on the construction site and give workers enough time to use it before it hardens. The Makeup Of An Excavator The anatomy of an excavator is made up of a boom, dipper (or stick) and bucket. These pieces connect to a cab that sits on a rotating house. Most houses can rotate a full 360 degrees. Excavators are available with either tracks or wheels depending on the manufacturer and what the nature of a project is. Excavators are available in a variety of sizes and can weigh up to 180,000 lbs. There are many other attachments for excavators that can take the place of the digging bucket to diversify the machine. By swapping out the bucket for an auger, drill, ripper or rake the excavator can be used for many different jobs. Choosing the Right Excavator for The JobThe best way to choose what excavator rental is needed for your project is to assess what exactly you need the machine to do. Identifying the right size of excavator, what attachments are needed and how long you need the rental for will help you determine the best machine for your job. It is more efficient for a job to rent the right size equipment for what is needed instead of trying to make one piece fit for a variety of jobs. To the uninitiated, tillers and cultivators may sound like two terms for the same thing --as if the words were completely interchangeable. The fact is they’re not. Though they are similar in design and concept, they are quite different and are intended for two specific purposes. Essentially, a tiller is the larger of the two and is used primarily during the beginning of the year to prepare new gardens for the growing season. Tillers are often used at the end of the year, as well, to mix all leftover vegetation into the soil for decomposition. Tillers generally dig deep --up to 8 inches of soil can be churned. Only once the plants have begun to sprout does a cultivator begin to do its job. Cultivating is defined as loosening the soil around growing plants. A cultivator does just that. Cultivators do not churn as deeply as tillers and are often used between rows; keeping the weeds at bay while helping to aerate the soil. This way, the plants benefit from loose soil, which allows more water and fertilizer to get to their roots. By keeping the weeds’ growth down they won’t be able to rob your plants of water and nutrients. If your gardening space is less than 100 sq. ft., you may be able to use a cultivator in place of a tiller to prepare the soil for planting as well as cultivating during the growing season, thus avoiding the need for two pieces of equipment. For a job larger than that however, the tiller/cultivator combination works best. If you plan on tilling once a year, then renting may be your best option. The cost of purchasing a tiller, in addition to maintaining and storing one, can be much higher than simply picking one up at your local rental dealer, using it and returning it when you are finished. What Is a Trencher? Trenchers are pieces of earthmoving equipment that use a metal chain with teeth made of high-strength steel to rip into the ground like a chainsaw would into a tree. Similar to an excavator, a trencher rips up the soil and any roots in the way to create a trench.
Дата Публикации: 25-02-22
How a Car Battery Starts a Car
Описание: How a Car Battery Starts a Car The first purpose of an auto battery is to provide power for starting your vehicle. It also acts as a surge protector for the car's computer and provides power for short-term use of things like lights, stereo, GPS or wipers when the engine is off.The car battery is part of the starting system. There are three main components in this system: The switch controls the starter relay (also called a solenoid). When you turn the ignition, it sends a small electrical current to the starter relay. This causes a pair of contacts to close.When those contacts close, the battery sends voltage to the starter motor, which turns some gears to start the car. What Are Cold Cranking Amps? Cold cranking amps (CCA) refers to the amount of power a battery can supply for 30 seconds even at low temperatures. Larger engines require more power to start, as does starting the car for the first time on a cold day. A high CCA rating is important for standard auto batteries in areas with subzero temperatures, since deeply discharged wet cell batteries can freeze solid in such weather. How the Car Battery RechargesThe alternator is responsible for recharging your car battery as you drive. This part also supplies power for your car’s electronics when you're underway. It is driven by the alternator belt from the engine. As the belt goes around, it generates electrical current to run your vehicle's electronics. It also sends some current back to the battery to recharge it. A voltage regulator controls this flow of electricity to keep it even and deliver the right amount of charge to meet needs like running the AC or heater. It also protects the battery from overcharging, which can damage it. Why Does My Battery Die?Over the life of a battery, discharge-recharge reactions happen thousands of times. Each cycle wears out the plates a bit, and over time the lead deteriorates. As your car battery loses capacity, cold cranking amps decrease. Deep discharging, which happens when you use the battery to run the stereo, lights or other electrical systems in your car when the engine is off, is responsible for a good portion of battery failures. Discharging most of your battery's capacity by using it in this manner for too long and then recharging it through driving can cause the sulfur in the electrolyte solution to stick to the lead and create other damage to the plates in the battery. What Are the Different Types of Auto Battery?The two most common auto batteries for sale today are standard wet cell batteries and absorbed glass mat (AGM) batteries. Both use lead-acid technology. The differences are in the needs of the car. Standard Wet Cell Batteries These are also called flooded, conventional or SLI (starting, lights, ignition) batteries. Some standard batteries have vents that allow for airing out corrosive gases, steam, and condensation (these may be called vented batteries). They have removable caps for adding fluid. Other wet cell batteries are closed systems, with no removable caps. Service needs: Occasional simple maintenance including cleaning off corrosion on terminals and topping off the fluid with distilled water if the battery has removable caps. The battery should be visually checked every year. Battery charge should be checked before road trips and after summer before temperatures fall. Lithium ion power battery the lives of millions of people each day. From laptops and cell phones to hybrids and electric cars, this technology is growing in popularity due to its light weight, high energy density, and ability to recharge. A battery is made up of an anode, cathode, separator, electrolyte, and two current collectors (positive and negative). The anode and cathode store the lithium. The electrolyte carries positively charged lithium ions from the anode to the cathode and vice versa through the separator. The movement of the lithium ions creates free electrons in the anode which creates a charge at the positive current collector. The electrical current then flows from the current collector through a device being powered (cell phone, computer, etc.) to the negative current collector. The separator blocks the flow of electrons inside the battery. CHARGE/DISCHARGEWhile the battery is discharging and providing an electric current, the anode releases lithium ions to the cathode, generating a flow of electrons from one side to the other. When plugging in the device, the opposite happens: Lithium ions are released by the cathode and received by the anode. What Is a Car Generator?The Car Generator utilizes a car’s alternator to supply power to external appliances like a home furnace, refrigerator, or lights. The Benefits of a Car GeneratorThe obvious benefit of using a Car Generator is that it can create 1,000W of power when needed. And because the power is coming from a car battery while its engine is running, there’s less noise and lower emissions compared to a typical gas generator. Plus, the Car Generator actually uses less fuel. Most vehicle engines can handle long periods of idling without detriment to the auto. And as long as there’s gasoline in the tank of the vehicle, the Car Generator can transfer its power to external appliances. So, with a full tank, most users can expect 50 to 80 hours of electrical power. The Disadvantages of a Car Generator There are a few drawbacks to consider, however, when using a Car Generator. If, for instance, a load of over 1,000W is put on the system, damage may occur to the vehicle’s alternator. 1000W will require about 90 to 100 amps off the alternator which most can put out without problem. The problem comes when this load is used for extended periods of time. This can overheat the alternator and melt internal windings. This means that you must take care when accumulating several appliances on the electrical line. For example, most air conditioners require more power than this device can support, as do microwaves and other high heating appliances, so check their wattage requirements before using. The other consideration may be the wear and tear on the existing vehicle from long idling times. Regularly maintain your auto before taxing its extended running capabilities. With the development of electric vehicle electronic control unit (ECU) for vehicle control technology and the key to raise the level of design electric vehicles the optimization control of the vehicle performance as direction. In order to achieve the rational, coordination of vehicles within the system of integrated control, based on the modular thought, through constructing the distributed control network design overall structure of the control system of pure electric vehicle, the vehicle controller is analyzed on the working principle and its function realization degree, as a pure electric vehicle control system provides the theory basis for performance evaluation. The development of manufacturing and management, technologies over the previous decade has transformed the automotive industry. The engine management system is undoubtedly one of the most intelligent systems in today’s automobile. The purpose of this paper is to design and simulate an automotive engine management system. Based on a PIC development board, we design and implement engine control functions which include an ignition system, acceleration, deceleration, emergency brakes, hand brakes, speed, and distance travelled. The C language is chosen for the development of PIC microcontroller. Results have shown and proven the success of the proposed system. Automotive electronics technologies such as autonomous driving, all-electric cars, and in-car infotainment are the new trends in the automotive industry. Automotive vehicles are transforming into the “ultimate electronic devices.” Automotive electronics are predicted to constitute near a third of the total cost of the entire car. The automotive transformations give rise to new features and challenges including (i) autonomous driving (ii) all-electric cars with extreme high power, and (iii) high-speed and secure communications and infotainment. In recent years, vehicle sensor improvements have led to increasingly advanced autonomous driving technologies that enable higher awareness and visibility. The special advanced features in the vehicle include adaptive cruise control, park assistance, lane-keep assistance, pedestrian detection, and traffic-sign recognition summarizes automotive electronics technology into five main categories as shown. In all five categories, an increasing number of electronics from different function sections are integrated into complex electronic systems. These electronic systems often address multiple categories simultaneously. The transition from mechanical systems to electronic systems in the automotive platform requires both higher electrical signal performance and mechanically reliable electronic packaging
Дата Публикации: 25-02-22
The Benefits of Stainless Steel Fittings
Описание: The Benefits of Stainless Steel Fittings Stainless steel is a versatile material that is used in many different applications. The two most common types of stainless steel are austenitic which is highly corrosion resistant and ferritic which is magnetic. In this blog we are going to break down the basics of what austenitic stainless steel is, the key benefits it provides and where the uses of stainless steel fittings can be most beneficial. All steels have the same basic iron and carbon composition along with nickel, but stainless steel also contains chromium - the alloy that gives stainless steel its well-known corrosion resistance. Austenitic stainless steel contains high levels of chromium and nickel and low levels of carbon providing a balance of strength, workability and corrosion resistance. The standard stainless steel alloys used in plumbing applications contains between 18-20% chromium and 8-12% nickel, as well as small amounts of carbon 0.08% and manganese 2%. Austenitic stainless steel has the highest corrosion resistance and are the most commonly used type of stainless steel around the world. Benefits of Stainless Steel FittingsStainless steel offers a wide range of benefits to the architect and designer of plumbing systems: Material Benefits The combining of corrosion resistance with high strength allows the reduction in wall thickness and weight. Stainless steel is resistant to heat and chemical damage. It can withstand very high flow rates - in excess of 40m/s, making it capable to withstand long-term exposure to the elements in almost any environment. Environmental Benefits Stainless steel can be used in all types of water, including drinking water in public supply. It has an excellent resistance to the full range of potable waters, including various chloride levels. At the end of its useful life, stainless steel is fully recyclable and retains a higher residual scrap value than ordinary steel. Economic Benefits Stainless steel is low maintenance and requires no additional coating, in both indoor and outdoor applications. The expected lifetime of a stainless steel system is more than 50 years, reducing system down time, replacement and maintenance costs over the life of the installation.With all the benefits that come with stainless steel there are equally just as many applications where these fittings can be utilized. Here are some key beneficial areas: Residential & Commercial water systems that are subject to various stresses.Commercial & Industrial piping systems that are needing to perform well under the toughest and harshest conditions. Industrial Projects for sanitary or highly corrosive applications. There are three kinds of marine hydraulic flange standards: asian system represented by Japanese standard, European system represented by German standard and North American system represented by the United States. German standard and American standard varieties are more complete, but in the shipbuilding industry is far less than the use of Japanese standard. The conventional flange of JIS is more popular, while the hydraulic flange is not separate into a system, commonly used only 210 Kgf /cm2, 280 Kgf /cm2 and 350 Kgf /cm2 three specifications. For a long time, high pressure marine hydraulic flange has few specifications, high price, long delivery time and other problems in the market. Considering that the number of hydraulic flanges required throughout the ship is not much. Some shipyards with machining ability often manufacture high-pressure hydraulic flanges by themselves. This paper mainly discusses the basic points of marine hydraulic flange design and gives a design example. Marine flange design There are many methods for marine flange design, such as bach method based on material mechanics, waters method based on elastic analysis by TY8100 method, and analysis method based on plastic limit load, etc. These methods are too cumbersome and complicated for engineering applications. Based on the JIS hydraulic flange standard, this paper explores a design method suitable for shipyards. What components make up a full hose assembly? When looking at a full hose assembly, it is basically a length of hose with a properly attached fitting on each end. Robert J. Koehler, Sr. Training Specialist at Eaton Corporation, explained that a hose assembly is composed of the hose and the end fittings, which are determined by the application in which the hose assembly is going to be placed. Hydraulic hoses have three major components, he said, which include the following: Tube: The tube is the inner-most portion of the hose. Its role is to convey the media from one end of the hose to the other and protect the outside from the media or fluid being conveyed. Reinforcement: The reinforcement is the strength of the hose and comes in a variety of types, including braided, spiral and helical. Cover: The cover is designed to protect the reinforcement and tube from the outside environment. “Each of these three components plays an important role to allow the hose to work in a variety of environments,” Koehler added. “These hoses are designed to meet different specifications and requirements that arise with the different environments where hoses will be installed.” “Fittings are usually made of metal, such as carbon steel, stainless steel, brass and so on. Within these fittings there are two major components,” he continued. Fitting components are comprised of the following: Socket: The socket is the portion of the fitting that goes over the outer cover. Stem: The stem is the portion of the fitting that goes directly into the I.D. of the inner tube of the hose. It extends out of the hose and into the connecting end. The connecting end of the fitting is the portion of the fitting that allows the hose to connect to other components. Hydraulic Hose Definition A hydraulic hose conveys hydraulic fluid to or between hydraulic components. Components include valves, tools, and actuators. Hydraulic hose is usually flexible and reinforced. Hose is often made up of several layers of reinforcement. This is necessary because hydraulic systems operate at high pressures. Needless to say, hydraulic hoses are essential parts of any hydraulic system. The hoses are flexible enough to bend around corners and fit in tight spaces. They can also stretch over long distances. What is Hydraulic Hose Made Of? Hydraulic hoses are often constructed of multiple materials. The most common materials are fluoropolymers and silicone, elastomers, metal, and thermoplastics. Composite or laminated materials are also common. Rubber and elastomeric hydraulic hose is a strong choice when you need flexibility. Fluoropolymer hose has a durable flex life as well. It also has excellent corrosion and chemical resistance, and it can handle high temperatures. Thermoplastic hydraulic hose has a tight minimum bend radius. It also features superior resistance to kinks. Metal hoses handle high temperatures and high flow materials well. They can also handle high pressures. Finally, they can be flexible or stiff. Flexible hoses are easy to install and route compared to rigid tubing. The flexibility reduces noise and vibrations. It also dampens pressure surges and allows for movement between the parts. Hydraulic Hose Construction Most hydraulic hose consists of three main parts. They have an inner tube to carry the fluid. Next is a reinforcement layer, followed by a protective outer layer. The inner tube is flexible and compatible with the fluid it will carry. A common compound is a combination of synthetic rubber, thermoplastics, and PTFE (Teflon). The reinforcement layer has multiple sheaths. The sheaths include spiral-wound wire, braided wire, or textile yarn. The outer layer is often resistant to abrasion, oil, or weather, depending on its intended use. What are the components of a hydraulic hose assembly? The hydraulic system definition is that which transmits pressurised hydraulic fluid within a mechanical system. Hydraulic hose assembly includes the hose and its fittings. There are different types of hydraulic hoses, but they all have the same components: What are hydraulic hoses made of? Hydraulic tube material typically includes a thermoplastic, synthetic rubber and Polytetrafluoroethylene (PTFE) to resist corrosion and chemical impact. The thermoplastics used are often polyamide, polyester and even fluoropolymers, which has a high resistance to solvents, acids, and bases. Hydraulic hose fittings There are different types of hose fittings. Their purpose is to connect hoses securely to your hydraulic system’s components, such as valves, cylinders and pumps. It’s the fittings that help hold and direct the flow of fluid, maintaining the pressure while preventing leaks. Fittings consist of the same two components. The hydraulic hose socket, along with the stem, mate the hoses. The socket goes over the hose cove while the stem fits into the tube’s inner tube. The stem extends out from the hose and acts as a connector for equipment to attach to.
Дата Публикации: 25-02-22
Magnetic Flow Meters: How They Work & What Is It
Описание: Magnetic Flow Meters: How They Work & What Is It An electromagnetic flow meter is a volumetric flow meter that does not have any moving parts. It is ideal for wastewater applications or any dirty liquid which is conductive or water based. Magnetic flow meters are also ideal for applications where low-pressure drop and low maintenance are required. Magnetic flow meters will generally not work with hydrocarbons, distilled water, and many non-aqueous solutions. How does a magnetic flow meter work? Magnetic flow meters use a magnetic field to generate and channel liquid flow through a pipe. A voltage signal is created when a conductive liquid flows through the flowmeter’s magnetic field. The faster the flow of the fluid, the greater the voltage signal generated. Electrode sensors located on the flow tube walls pick up the voltage signal and send it to the electronic transmitter, which processes the signal to determine liquid flow. What is the operating principle of a magnetic flow meter? The operation of a magnetic flow meter or mag meter is based upon Faraday's Law, which states that the voltage induced across any conductor as it moves at right angles through a magnetic field is proportional to the velocity of that conductor. As applied to the design of magnetic flow meters, Faraday’s Law indicates that signal voltage (E) is dependent on the average liquid velocity (V) the magnetic field strength (B) and the length of the conductor (D) (which in this instance is the distance between the electrodes). Vortex Flow Meter A vortex flow meter is a flow measurement device best suited for flow measurements where the introduction of moving parts presents problems. They are available in industrial grade, brass or all plastic construction. Sensitivity to variations in the process conditions are low and with no moving parts have relatively low wear compared to other types of flow meters. Vortex flow meters operate under the vortex shedding principle, where an oscillating vortexes occur when a fluid such as water flow past a bluff (as opposed to streamlined) body. The frequency that the vortexes are shed depend on the size and shape of the body. It is ideal for applications where low maintenance costs are important. Industrial size vortex meters are custom built and require appropriate sizing for specific applications. The Working Principles of Turbine Flow Meters Turbine flow meters are employed for both lower viscosity gases and liquids with turn down ratios from 7 to 30:1. The use of an appropriate zero drag electronic pick off in place of the standard magnetic type is the reason behind achieving this extended range. The turbine experiences too much extra drag at low fluid velocities due to the standard magnetic type. As a result, the rotational speed is slowed down. The typical accuracy and repeatability of turbine flow meters are ±0.5% and ±0.1%, respectively. However, it is possible to achieve accuracy of ±0.25% and repeatability of ±0.05%. Turbine flow meters (Figure 2) are inherently sensitive to Reynolds number. They will not be linear at Reynolds numbers nearing or in the laminar region. Therefore, they should be carefully used in the case of fluids with a broad temperature and viscosity range such as some oils. It is not a problem at constant conditions, but is often hard to achieve practically. Meter Design Designing an axial turbine in principal is simple, i.e., putting a propeller in a tube. With years of experience, the basic design has been developed into a relatively complex assembly. The key aspect of any design is keeping the turbine spinning freely. Hence, bearing design and sources of drag within the assembly have been given special focus. Due to this, it is difficult to make miniature axial turbines as the relative turbine energy is largely negated by the bearing and sensor drags. For rotational efficiency, plain bushes or roller/ball bearings are employed. A ball is generally employed to handle the end thrust. The presence of hydrodynamically designed turbine and bearing supports in some designs creates a low pressure zone in front of the turbine. As a result, the turbine is pulled forward, thus mitigating or removing the end thrust. The bearing supports lower pressure drop but increases the fluid velocity over the turbine blades. The sensor is typically magnetic and provides a low voltage sine wave output. An electronic pick-up is generally employed for extended flow range, extra accuracy or in the case of operating the flow meter in an electrically noisy environment. What is an Ultrasonic Flow Meter : Types and Its Applications The first ultrasonic flow meter was invented by Japanese physicist namely “Shiego Satomura” in the year 1959. This flow meter uses Doppler technology and the main intention of this meter is to deliver the analysis of blood flow. After four years, the earliest flow meters have appeared in industrial applications. At present, there are many manufacturing companies were designing different types of clamp-on flow meters to measure the liquid flow within a pipe. These meters use high-frequency sensors by penetrating throughout the pipe wall as well as the liquid by using Doppler otherwise transit time propagation method. So that fluid velocity and flow rate can be determined. What is an Ultrasonic Flow Meter? Definition: An ultrasonic flow meter can be defined as, a meter that is used to measure liquid velocity with ultrasound to analyze the volume of liquid flow. This is a volumetric flow meter that needs bubble or minute particles within the liquid flow. These meters are suitable in the applications of wastewater but they will not work with drinking/distill water. So this type of flow meter is ideal for the applications wherever chemical compatibility, low maintenance, and low-pressure drop are required. These meters will affect the audio properties of the liquid and also impact through viscosity, density, temperature, etc. Like mechanical flow meters, these meters do not include moving parts. The price of these meters will change greatly so frequently it can be used and maintained at a low cost. Ultrasonic Flow Meter Working Principle An ultrasonic flow meter construction can be done by using upstream and downstream transducers, sensor pipe and reflector. The working principle of ultrasonic flow meter is, it uses sound waves to resolve the velocity of a liquid within a pipe. There are two conditions in the pipe like no flow and flowing. In the first condition, the frequencies of ultrasonic waves are transmitted into a pipe & its indications from the fluid are similar. In the second condition, the reflected wave’s frequency is dissimilar because of the Doppler Effect. Whenever the liquid flows in the pipe quickly, then the frequency shift can be increased linearly. The transmitter processes the signals from the wave & its reflections determine the flow rate. Transit time meters transmit & receive ultrasonic waves in both the directions within the pipe. At no-flow condition, the time taken to flow in between upstream & downstream in between the transducers is the same. Under these two flowing conditions, the wave at upstream will flow with less speed than the downstream wave. As the liquid flows faster, the distinction between the up & downstream times raises. The times of the upstream & downstream processed by the transmitter to decide the flow rate. Types of Ultrasonic Flow Meter Ultrasonic flow meters available in the market are radar, Doppler velocity, ultrasonic clamp-on, and ultrasonic level. Doppler velocity type meters use reproduced ultrasonic noise to calculate the liquid’s velocity. Radar type meter employs microwave technology for transmitting small pulses to reflect off a flowing surface back to the sensor for deciding velocity. Ultrasonic clamp-on type meter is ideal for applications wherever accessing the pipe is difficult otherwise not possible. Ultrasonic level type meter is ideal for determining the fluid level in both open & closed channels. Advantages of Ultrasonic Flow Meter The advantages are It does not block the path of liquid flow. The o/p of this meter is different for density, viscosity & temperature of the liquid. The flow of liquid is bidirectional The dynamic response of this meter is good. The output of this meter is in analog form Conservation of energy It is appropriate for huge quality flow measurement It is handy to fit and maintain Versatility is good There is no contact to liquid There is no leakage risk There are no moving parts, pressure loss High accuracy Disadvantages of Ultrasonic Flow Meter The disadvantages are It is expensive as compared with other mechanical flow meters. Design of this meter is complex Auditory parts of this meter are expensive. These meters are complicated as compared with other meters, thus it requires specialists for maintaining and repairing these meters It cannot measure cement or concrete pipes one they rusted. It doesn’t work once the pipe contains holes or bubbles in it Can’t measure cement/concrete pipe or pipe with such material lining Metal tube rotameter and other material flowmeter are used to test the flow parameters of gas or liquid. We have mentioned a lot about the difference between metal tube rotameter and its flowmeter, so we should have a lot of understanding for such a test instrument. However, when using this kind of flowmeter with a float, we will encounter a problem, that is, the pointer of the flowmeter vibrates, so that it is unable to accurately detect the flow. In the use process of metal tube rotameter, if the site environment is corrosive, acid or alkaline gas will also have a certain corrosion effect on the flowmeter in the air. Rust / rust is a big defect of metal products. Once the article begins to rust, its corrosion will continue, and then it will affect the equipment Very bad. As a metal measuring instrument, metal tube rotameter is easy to rust. Corrosion will not only affect our use effect, but also affect our service life, so we also need to deal with the corrosion of the surface? So how should we deal with it? This seems to be a problem that users need to understand. Step or need to start from the usual use of work, that is to say, we should do a good job in the maintenance of the instrument, so as not to make the instrument quickly problems, our use will become more smooth. And if the beginning of corrosion, then we need to spend a lot of energy to complete the rust treatment work, we can remove its rust surface by cleaning agent. Or solve it in other ways.
Дата Публикации: 25-02-22
How to start paper plate making company business
Описание: How to start paper plate making company business Disposable paper plate making business are the demand of the day for the Food & Beverage industries. Whether it’s a School Canteen, a vendor selling food on the train, or an anniversary party, plastic plates can be easily seen being used. Unlike plastic plates, these are eco-friendly and bio-degradable waste, therefore, preferred over other plates among most of the environment-conscious & developed countries. So paper plate business covers the Indian market as well as other developed countries’ market. Double die Press paper plate machine cost Depending upon the type of paper plate making machine, whether fully automatic or semi-automatic, and type of dies used.The cost of Fully automatic Hydraulic paper plate machine ranges between INR 97,000 to 5 lakhs. New tests by BEUC, the European Consumer Organisation, claim to show that food packaging made of coloured paper and cardboard may contain and release chemicals originating from the inks used for printing. The claims come amid an ongoing shift from plastic to paper packaging for a range of products. Paper is the second most used food packaging material after plastics and used for items like coffee cups and straws. But, unlike plastics, there are no EU rules governing paper’s use as a “food contact” material. With single-use plastics set to be banned in the EU from 2021, the BEUC tests have raised safety concerns over some alternatives like paper. The group says the results show the need for EU-wide laws regulating the use and safety of all paper and cardboard food packaging. In the tests, BEUC analysed 76 samples of printed paper food container or board food packaging, such as coffee cups, paper straws, printed napkins and grocery products. BEUC said the findings show that more than one in six samples contained primary aromatic amines, some of which are suspected to cause cancer. Nine samples contained these chemicals above the limit set in the EU Plastic Regulation. Almost all 76 samples contained UV filters. Some UV filters are suspected to cause cancer or disrupt the hormone system. Further analysis of 21 samples showed that UV filters migrate into food above the recommended levels in six products, including a children’s box of raisins. The safety of most of the substances found to migrate into food has not been evaluated by the EU food safety watchdog, EFSA. Reacting to the findings, Monique Goyens, director general of BEUC, told this website, “Most consumers naturally assume that the material in direct contact with their food is free of harmful chemicals but that is sadly not the case.” Why is industrial packaging important? Packaging is everywhere. It’s an important component of the consumer-led lives we lead. Whenever we make a purchase online or in the shops, our products are contained in some form of packaging. But while we are all too familiar with packaging in supermarkets, industrial packaging is often overlooked – and it’s one of the most important links in the supply chain. Industrial packaging includes everything from blue plastic drums to cardboard boxes, all of which help products to arrive safely and in perfect condition. In this article, we take a look at why industrial packaging is so important. WHAT IS INDUSTRIAL PACKAGING? To understand why industrial packaging is so important, you first need to understand what it is. The goal of industrial packaging is to protect industrial goods while they are being stored or transported. It’s often heavy-duty and versatile, and is designed to store large quantities of goods, from hazardous waste to foodstuff. Industrial packaging is different from the commercial packaging you find in shops in terms of scale and materials used. Common types of industrial packaging include blue plastic drums, steel drums, cardboard boxes, intermediate bulk containers (IBC) and fibre drums, among many more. HEALTH AND SAFETY In an industrial capacity, the most important role that industrial packaging plays is in terms of health and safety. Indeed, many laws and regulations require stringent health and safety standards to be reached and procedures to be followed. Industrial packaging helps businesses to meet their requirements. It’s designed specifically to store industrial goods, although it’s vital that you select the correct type of packaging for the goods you need to store. Industrial packaging keeps goods safely stored while they are in the warehouse or in transit to their destination. Packaging such as blue plastic drums, for instance, is certified to hold hazardous waste and chemicals. Containers such as steel drums are certified to hold petrol and other types of fuel. In the event of an accident, if your goods are stored in the correct containers, the packaging helps to minimise danger to health and safety. PROTECTION OF PRODUCTS As well as proving essential for health and safety reasons, industrial packaging protects products from damage or contamination during storage or transport. Products that need to be sold in a supermarket, for instance, can be boxed up in industrial standard cardboard boxes that offer protection when they are in transport from the wholesale warehouse to the shop floor. Industrial chemicals can be transported in UN-approved plastic drums, where they will be protected from contamination. Drum liners can help to avoid any cross-contamination while making the drums reusable, too. Industrial packaging will prevent liquids from spilling, and it will protect goods from being damaged or broken while they are in transit. ADVERTISING AND BRANDING As well as playing a role in health and safety and protecting goods from damage or contamination, industrial packaging plays an important role in advertising and branding. Just as commercial packaging is branded informing you which products you are buying and from which company, industrial packaging can be similarly designed. Drums, boxes and containers can all be custom-painted with a company’s colours or labelled with their logos. While in storage or transport, extra branding can be a great opportunity to advertise products or services to potential buyers. LAWS AND REGULATIONS Industrial packaging is purposefully designed to allow businesses to comply with laws and regulations that govern how industrial goods need to be stored and transported. It must be UN approved and meet stringent regulations if chemicals, hazardous waste, or any other potentially dangerous goods are stored inside. Many types of packaging, such as plastic drums, have this capability. If industrial packaging needs to be used for storing foodstuffs, then it must be made from food-grade materials. This prevents any contamination between the materials and the food that is being stored. Packaging accounts for about half of all worldwide paper consumption Among the types of packaging paper are all kinds of corrugated cardboard, kraft paper for paper bags and classic brown packaging paper, as well as the cover layers of plasterboard. As a rule, a high portion of recovered paper is common to all of them. They perform important functions in merchandise management: protection from damage during transport and storage, as information carriers or purely for image enhancement. For this reason, the quality and functionality requirements that packaging paper has to meet differ widely. Generally, worldwide demand for paper, cardboard and paperboard for packaging applications is rising steadily. Nowadays, packaging accounts for about half of all worldwide paper consumption. At the same time, the industry is facing the challenge of constantly having to adapt packaging papers to current trends in design, ecological compatibility, protective and advertising functions. In the process, numerous conditions have to be considered, such as the suitability and compatibility of the materials for the packaged goods, statutory regulations on hygiene, packaging regulation provisions, marketing aspects, and of course, cost. In this context, we work with our customers to provide tailor-made solutions for each application. We are experts for packaging paper machines As a single-source supplier for paper container machine or packaging paper machines, we also focus on efficient and resource-conserving solutions, such as production based on 100 percent recovered paper. By working closely with our customers, we repeatedly achieve breakthroughs in machine speed and grammage. For our customers, this has a clear economic benefit, as more goods can be produced in a shorter time.
Дата Публикации: 25-02-22
What's The Difference Between Open Frame & Closed Frame Panels?
Описание: What's The Difference Between Open Frame & Closed Frame Panels? What exactly comes to mind when people say panel display or monitor? Many tend to think of closed frame displays without realizing that it is just one of the possible configurations available. A closed frame display can simply be described as a monitor with a front bezel and is fully enclosed just like most consumer grade LCD monitors. Even many of the industrial grade touch monitors and panel PCs are closed frame displays. Some good examples that one can find are public kiosks, point of sales terminals, and ticketing booths, all of which utilize basic or generic enclosures. But what happens when there is a specific enclosure that one wishes to insert into the display? Perhaps, that enclosure is designed to have specific function or is aesthetically built to be compatible with their brand. Would one then have to remove the display from its existing enclosure, discard it and then insert the display into their exclusive enclosure? At first glance, this might not seem like such a big deal. One can simply take a regular closed frame consumer grade desktop monitor and remove the display from its casing. Sounds like an inexpensive and cost effective solution, right? Well, let’s explore this a little bit further now. Say there is a need to build kiosks for over a thousand locations. This means we have to include the cost of installation and dismantle labor for more than a thousand monitors. But keep in mind that these consumer grade desktop monitors are not industrial grade and are not meant to function outside of their enclosure nor they are intended to be operated 24/7 like most kiosks. What happens if you have to place the kiosks outdoors? Will it still be able to display properly even when the original enclosure is removed? Can it withstand the harsh conditions and still be able to operate normally? Industrial Panel PC Open Frame Solution Removing a display from a consumer grade monitor is not actually the smartest idea. This is where an open frame display can be considered as a perfect solution to the problem. Open frame monitors and touch panels do not have any enclosure such as bezel or housing. Just like the consumer grade desktop monitors, open frame displays come in numerous screen sizes as well as aspect ratios, resolutions and brightness. It is simply a stripped-down version of an LCD panel with just enough support structure and protection in which its internal components are fastened within its metal chassis. Although the open frame displays are significantly more expensive than the consumer grade monitors, the industrial grade components and higher grade LCD panels are quite substantial in durability and performance. Moreover, open frame displays provide greater flexibility by simply inserting additional components inside its chassis to support its application. Existing components can also be easily replaced if they fail and are upgradeable since all components are industrial grade. And since these components are of industrial grade, the unit is more rugged and durable compared to a typical desktop monitor. This allows incremental revisions to a unit rather than having to replace the entire display. What cannot be overstated is the open frame’s lack of enclosure. This gives the integrator the freedom to create their custom-designed enclosure. Some obvious examples which can be seen every day are cabinets with embedded touch monitors, recessed walls, or tables used for digital signage applications including store front displays, photo booths, arcade games, and even advertising billboards. VESA Standards For Panel PC Mount Whether one is considering the traditional closed frame or industrial open frame display to be their optimal solution for their application; one must also take into account on how they will manage to mount their display. Most closed and open frame industrial panels provide a panel mount. However, there may be instances in which the panel display needs to be mounted from the rear. This type of mounting interface for a panel PC is usually not some arbitrary design. If that is the case, then mounting the panel display could very well be the most difficult part in designing your application. The Video Electronics Standards Association, better known as VESA, provides technical standards for panel mounts which is usually referred to as a VESA mount. This standard is defined by 7 sizes each with more than one variant. By having such standard, it allows the integrator to design their enclosure to adhere to a particular VESA mount to help simplify the process. For many of today’s demand on digital signage applications, a closed frame industrial panel PC might just be the answer. However, it is important that the touch panel is reliable and durable even in high touch operating environments, as well as rugged enough to endure harsh conditions. For other integrators, the option of having an open frame solution can minimize workload and eliminate unnecessary disassembly, plus it can also ease the process of designing their enclosure to integrate with the panel. Furthermore, the panel mount minimizes the frustration of having to design the enclosure, knowing there is a set of VESA standard mount to take into consideration. By taking advantage of any of these 3 possibilities, you can customize an optimal design and solution for your touch panel application. USB charger A power adapter that generates the 5 volt DC standard required by USB. The amperage varies, typically from .07A to 2.4A. The charger plugs into an AC outlet, and a USB cable plugs into the charger. USB ports on computers have an upper limit of 500 milliamps; however, USB chargers that come with cellphones and other devices handle one or more amps. The devices sense when they are connected to a computer versus the charger and regulate their current draw. USB chargers connect to the cable via a Type A USB socket. Geared to the device, the cable has a smaller plug at the other end What's Inside Open up a typical charger and you find a couple of chips and several discrete components. Chargers Are Everywhere Passengers can charge their devices by plugging them into this USB port on the back of the seat in front of them. DO Choose the Right Type of Extension Cord for Your Needs Extension cords fall into three broad categories: occasional use, frequent use, and rugged use. To make sure you find the right types of extension cords for your needs, check the packaging or the cord itself for these designation letters: indicates general-use cord goods for indoor applications. indicates a cord designed for outdoor use. The biggest difference between indoor and outdoor extension cords is the insulation. Outdoor versions have bright orange rubber, plastic, or vinyl covers, while indoor cords are much less heavy-duty. means the cord has standard 300-volt insulation. If you see no J designation, the cord is designed for heavier use with 600-volt insulation. indicates a household extension cord with parallel wire construction. means the cord jacket is made of vinyl thermoplastic. means the cord jacket is made of thermoplastic elastomer rubber (TPE). indicates an oil-resistant cord. DO Buy Three-Prong Plug Extension Cords Standard extension cords are available with either two or three prongs. One prong is “hot,” the second is “neutral,” and the third serves as a path to the ground wire. This third prong drastically reduces the risk of shock and electrical fires by giving power surges a safe place to dissipate. Of course, you can only use three-prong extension cords with three-prong outlets. If your home has outdated electrical wiring, you may need to upgrade it before converting your outlets to newer three-prong versions designed for enhanced electrical safety. DON’T Overload Your Extension Cords Extension wire has a maximum amperage rating, or a limit of electrical current it can safely conduct. Check the device you plan to connect and choose an extension cord with an amp rating higher than the device. If you plan to connect multiple devices, add up all amp requirements to ensure you don’t overload the extension cord. Tip: If the power requirement on a device is listed in watts, divide the wattage by 110 to convert the rating to amps. If the cord you’re considering doesn’t give an amp rating, you can calculate its current capacity by its wire gauge. The lower the gauge, the higher the wire’s capacity. Follow these guidelines: A 16-gauge extension cord is for light duty applications (holiday lights, portable fans, hedge trimmers, etc.). A 14-gauge cord is for medium duty applications (lawnmowers, power drills, table saws, etc.). A 10- to 12-gauge cord is for heavy and extra heavy duty applications (chainsaws, circular saws, shop vacs, air compressors, etc.). In addition to amperage and gauge, you should also consider cord length when choosing the right type of extension cord. Longer cords create more electrical resistance and deliver less power to the connected device. It’s best to use a cord of the proper length to reduce power loss, especially if you’re using a device with a high amperage rating. DON’T Plug Sensitive Electronics into Ordinary Extension Cords Extension cords and surge protectors are not the same things. The purpose of a surge protector is to divert or block excess power by grounding it. Even minor surges could damage sensitive electronics, so plugging them into surge protectors (or extension cords with built-in surge protection) is vital.
Дата Публикации: 25-02-22
What is interlocking bricks?
Описание: What is interlocking bricks? In general, the construction process and masonry are difficult, time-consuming and expensive. Different types of construction methods are considered and developed to overcome the difficulties and problems encountered during construction. At the same time, the materials and equipment used for construction are also fabricated to improve the quality of construction and reduce time and cost. One such breakthrough in the construction industry is interlocking blocks. Interlocking bricks are an improved form of traditional clay bricks. Each brick is designed to seal itself to other surrounding bricks without the use of mortar. Automatic locking is achieved using the Shear key and the lock mechanism. Depending on the design, the shape of the shear key will vary and provide a complimentary lock on the opposite side of the brick. Load transfer is achieved by shear transfer and gravity. Interlocking blocks are compacted and stabilized earth bricks, which contribute to the strength of the structure. They are not usually packed. Interlock bricks come in different sizes and locking systems depending on the supplier. How are Interlocking Bricks made?High-quality interlocking bricks are made of cement, sand and Stone dust mixed together in appropriate proportions. The required materials are batched and mixed proportionately. Once the required mix is prepared, it is then compressed to form bricks with desirable interlocking patterns. The compression is achieved by using a hydraulic compression system. The bricks are then subjected to curing for about 7 days. High-quality interlocking bricks are mixed together in appropriate proportions by cement, sand and stone dust. The required ingredients are compiled and mixed in proportion. Once the required composition is prepared, it is compressed to form bricks with desirable interlocking shapes. Compression can be achieved by using a hydraulic compression system. Then the bricks are cured for about 7 days. Advantages of Interlocking BricksThere are many reasons why you may want to use Interlock brick. Let us first go over the benefits of interlock bricks:Economical: Interlock bricks are made of cement with the addition of cement and sand, so they are made of cement at a lower cost than conventional bricks. In fact, interlocking bricks cost 35% less than conventional bricks. Interlock bricks may contain 10% cement, with the remaining mixture containing soil and sand. Earthquake resistant: The reason is simple. Ordinary brick relies on mortar for its support system. If the mortar fails, the entire wall or building will fail. But interlocking bricks have their own support system that does not depend on the mortar. They effectively support each other.Governments recommend: In earthquake-prone areas, some governments recommend interlocking bricks. Interlocking bricks may be a better choice if you are building in an earthquake-prone area. Better insulation in hot areas: Interlocking bricks are also suitable for hot areas. Because it is compressed, it has more mass and the brick keeps the interior of the building cooler. Environmentally friendly: The use of interlocking bricks can help protect the environment. Not only will they use less concrete and mortar, but building occupants will not need to use as much air conditioning as the interior temperature is lower. Labor shortage: Not only does it cost less to make interlocking bricks, but it also requires less effort and fewer workers. For example, there is no need to check the water level compared to ordinary brick. Curing faster: If you want to quickly build a building, interlocking bricks can help. No need for long curing of bricks (only need to cure for 7 days compared to 2 days). A container yard pavement comprises one or usually more layers of pavement construction materials arranged so as to support and facilitate the handling and storage of containers by a port's container handling equipment over the natural or improved subgrade on which the port is built. In this regard, container terminal pavements are similar in character to highway pavements or aircraft pavements. However, container terminal pavements are required to deal with the following unique matters:Wheel loads of container handling equipment can be an order of magnitude greater than those commonly encountered on highways: highway pavement design methods should not be used for container terminal pavements. It is common for container handling equipment to travel in channellised paths: pavement surfacing materials which have performed well on highways may fail in these areas. Tyres are often inflated to over 1,000 kPa (145 psi), whereas highway vehicle tyres are inflated to 700-800 kPa (100-115 psi). This can lead to rapid deterioration of surfacing materials. Braking, cornering, accelerating and running over uneven surfaces increase wheel patch loads applied to a container pavement significantly. Container terminal pavements sometimes fail at the locations where these factors predominate. Containers rest on four corner castings which can easily lead to deformation of soft surfacing materials. The sizes and shapes of container terminal pavements introduce onerous drainage requirements which can lead to pavement materials becoming wet and damaged. Slow moving handling equipment can lead to deformation of flexible surfacing materials. Container yard pavement comprises a major element in the capital cost of a container terminal so their design needs to minimise both the construction cost and maintenance cost, usually over a fixed period which is related to the commercial arrangements in place. All parties involved in container terminal pavements need to recognise the following potential issues which are dealt with more fully in the remainder of this report. WG 165 would consider the following matters to comprise a distillation of the potential pitfalls. It is their hope that there will be no more significant container terminal pavement failures. The remainder of this report seeks to provide information and analysis which will ensure that designers/ constructors/operators are able to circumvent any issues resulting from the following factors: materials, design, maintenance, drainage, settlement, automation, ground conditions and units. While, flexible pavements are the predominate pavement types used in container terminals throughout Australia, no standardised guidance exists either nationally or internationally combining all aspects required for the design, specification and management of flexible pavements for terminal operations. To address these deficiencies, the Australian Asphalt Pavement Association is undertaking a project to develop a fully calibrated design procedure for the design and specification of flexible pavements for container terminals. As part of this project, an assessment of the performance of flexible pavements at over 15 major container and intermodal terminals across Australia was undertaken. This study examined the performance and required level of serviceability of flexible pavements in container terminals, with the pavements in the study being in service for periods from 1 to over 30 years. Some pavements were specifically designed for container handling equipment and operations, while others used designs and materials typical for road and highway applications. Loading on these terminals included highway trucks, terminal trucks and trailers, front end loaders straddle and shuttle carriers. The study looked at the performance as a function of pavement and material design and specification, the required level of serviceability and resulting maintenance intervention requirements for terminal pavements. Pavement performance issues were found to include loss of surface shape, rutting, cracking, damage due to corner casting and damage caused by operations of the terminal, which may or may not effect performance. These were than used to emphasise the requirements for design and detailing of terminal pavements.
Дата Публикации: 25-02-22
Hydraulic guillotine shears V.S Swing beam shears
Описание: Hydraulic guillotine shears V.S Swing beam shears We are always confused by a question that why hydraulic shearing machines are divided into swing beam shear and guillotine shear.why we say hydraulic guillotine shear is upgraded version of hydraulic swing beam shear.compared with the hydraulic swing beam shear,what are the advantages of hydraulic guillotine shear ? Firstly we lists the key differences between QC12 series swing beam shear and QC11 series hydraulic guillotine shear: Blade carrier cutting movementHydraulic Swing Beam Shears: – Unipivot support，lever principle;Do arc-shaped curvilinear motion around the rear fulcrum.Hydraulic Guillotine Shears: – Three-point support rolling guide（Lower eccentric shaft, front support shaft，upper eccentric shaft; Do linear vertical motion. Blade style:Hydraulic Swing Beam Shears: – Top blade in prismatic shape，can only use two bevel angle cutting edge;Lower blade in rectangular shape，four cutting edge can be used. Hydraulic Guillotine Shears: – Both upper and lower blade are in rectangular shape;–All four cutting edge can be used.Cutting angle adjustment: Hydraulic Swing Beam Shears: – Fixed cutting angle and blade carrier angle;Can only cut in specific angle whatever the thickness of the plate. Hydraulic Guillotine Shears: – Adjustable cutting angle, different cutting angles are applied for cutting plate with different thickness.Adopt smaller cutting angle can effectively reduce the distortion of sheet metal, and increase cutting speed;Can also increase the shear angle to increase the shear force. Lubrication point Hydraulic Swing Beam Shears: – Bevel gears are heavily worn and require frequent lubrication to increase service life.Hydraulic Guillotine Shears: – Most use self-lubricating spherical plain bearings, basically don’t need to manually lubricate.Backstop structure (optional)Hydraulic Swing Beam Shears: – 500W AC motor + universal connection twisted shaft;Easy to cause gaps, no spring buffer, no retract function. Hydraulic Guillotine Shears: – Inverter + speed motor + encoder + electronic digital display;Stepless speed regulation, low noise, spring retraction and buffer function. The hydraulic shears are more accurate than the hydraulic swing beam shears Shear AccuracyTake 16*3200 hydraulic swing beam plate shears and hydraulic brake plate shears,Both of the blade clearance of the swing beam shear and guillotine shear is 0.04 mm.However, the clearance of the bearing connection between the swing arm and the pendulum body of the swing beam shearing machine cannot be completely eliminated.The accuracy errors between gaps and blade edge clearance are generally above 0.1 mm.Therefore, the accuracy of the swing beam shearing machine is theoretically twice worse than the guillotine shearing machine.The rear guide rail of the guillotine shearing machine is pressed by the bearing withthe compression spring pad on the back, so that there is no gaps between the front and rear guide rails. The accuracy of the gap between the clearance and the blade edge gap is kept below 0.04 mm, so that the shear material can be made smoother and no burrs.Adjustable cutting speed on hydraulic guillotine shears and fixed cutting angle on the swing beam shears Shear AngleSwing beam shear’s cut angle is fixed angle, shear speed cannot be adjusted for guillotine shears, By adjusting the two engineering cylinder up and down series of closed chamber oil rapid adjustment to achieve the angle adjustment: Shear angle is large, shear capacity increases, shear angle decreases, shear speed up, which has the advantage of saving power and working hours as well as reducing curvature of sheet effectively. When cutting a sheet with a thickness of less than 20 mm, the shear angle of the swing beam shearing machine can not be adjusted, so the material being cut has a twisted twist. The narrower the cut material, the larger the distortion.The guillotine shearing machine can achieve step less adjustment of the shear angle. The cut sheet is not easy to be distorted and deformed to ensure the machining accuracy of the workpiece.More importantly, the shear force is stronger after the shear angle is increased. Nowadays, the famous shearing machine manufacturers all over the world are mainly producing hydraulic guillotine shearing machine, and the price is slightly higher.Compared with the hydraulic swing beam shearing machine, the hydraulic guillotine shearing machine has the advantages of high shearing precision, adjustable shear angle and long service life of the cutting edge. The Cable Wire Recycling Machine is a waste wire and cable processing and recycling equipment. It has the advantages of small area, low energy consumption, high copper-plastic separation rate, and simple operation. It is favored by market bosses in the metal recycling industry. Mainly recycle and process automobile circuit wires, communication cables, miscellaneous wires, etc., with one feeding and a single machine. The equipment adopts a closed production mode and has a good dust removal effect. The appearance of the Cable Wire Recycling Machine has solved the environmental pollution caused by the incineration of copper. It not only improves the quality of recycled copper, but also has the advantage of recycling plastic. Some rubber shoe factories will use the sorted rubber for the soles of rubber shoes. In this way, it is full of treasures. Cable Wire Recycling Machine equipment is not only a representative of green in the machinery industry, but also reflects the customer's pursuit of interests. The old-fashioned recycling process of waste electric cables-produced under the pressure of major environmental pollution caused by incineration. The Cable Wire Recycling Machine equipment recycles waste wires and cables cleanly and environmentally. It can treat waste wires without causing any environmental pollution. The plastic and metal copper in the cable are fully recovered, mainly by mechanical physical crushing, and then the crushed metal-plastic mixture is separated from the crushed metal and plastic by a specific gravity separator. This is a typical new type of machinery and equipment that turns waste into treasure, conforms to the development of environmental protection and energy conservation, S0 guidance should be strongly advocated. Types of Press BrakesModern press brakes are much safer and don’t require nearly as much effort as earlier models. In fact, modern brakes have increased the speed, quality, and efficiency of bending metals. When it comes these modern brakes, there are three common types: manual, hydraulic, and CNC. Manual Press Brakes: also known as sheet metal brakes, these are the most common type of brakes. Manual brake presses require you to manually adjust the bending dimensions and angle at each cut, and are best used for the mass production of set bending sizes and angles. Hydraulic Press Brakes these brake presses utilize two hydraulic cylinders, allowing more control and consistent strokes. They are often classified by their movement, up acting or down acting, with each style having its own distinct advantages. CNC Press Brakes: these types of brakes have the highest precision and customization abilities, utilizing computer technology to control accuracy and increase efficiency. When using CNC brake presses, data such as bending angle, plate thickness, width, and grade are entered into a controller by a trained operator and the brake easily handles the rest. Understanding the working behind a machine can help you make use of the full advantage of the machine. Also, it is important for the maintenance and well-keeping of the machine. Therefore, in today’s article, we will be looking through and understanding the working of a Hydraulic Shearing Machine. While we are at it, we will also look at other factors relating to a Hydraulic Shearing Machine so that you have a full grasp of what the equipment is all about and the scopes that it has to offer to you and your business. If you are ready, let us start right away. Defining a Hydraulic Shearing MachineBefore we get to the workings, let us first understand what a Hydraulic Shearing Machine is and its uses. A Hydraulic Shearing Machine is an industrial tool used for cutting metal bars and sheets that you otherwise would find difficult to cut. It includes a combination of rotating blades and disks that allow for the above-mentioned action. Since Hydraulic Shearing Machines all have the same mechanism (more or less), they can be of different kinds based on their blades’ shapes — linear or circular. There are various ways of shaping a given material or metal, of which shearing is a method. Other methods include bending, cutting, spinning, and rolling. The Hydraulic Shearing Machine has various uses and is a prime fabricator tool. Accurl has had consistent clients from a variety of industries that utilize these tools. It is mainly used in the manufacturing industry for producing different products. Some prime products produced by the Hydraulic Shearing Machine are parts of ships, planes, railways, and so on. It is used in heavy-duty industries such as those mentioned above. It also can be used for other industries such as the cooking, electric, and decorative industries.
Дата Публикации: 25-02-22