Aluminum Spiral High Speed Door
The Spiral door offers high-speed operation for high-traffic situations and rigid aluminum slat construction that eliminates the need for a second security door. Crisp lines give the Spiral door a stylish look that's great for many types of commercial, automotive retail, government, institutional and industrial applications. The Spiral is ideal for automotive dealerships, government, parking and security. Benefits No metal-to-metal contact reduces wear on the door panel and offers fast, quiet operation.
Aluminum spiral High Speed doors are usually used wherever goods traffic occurs and where the doors have to fulfill special requirements. In the food and beverage industry, or Medical industry for example, special climatic conditions have to prevail; short opening and closing times reduce cooling loss, avoid airflow and enable a smooth operating procedure. They can also be designed in larger dimensions for the mining and aircraft industries.
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EFD has been mainly engaged in this special heat treatment field since the 1960s. With the development of materials (steel or cast iron), EFD equipment has demonstrated advanced technology. In addition to different materials, deformation control is also a major factor in the manufacture of crankshafts. The demand for deformation control in the market has prompted the birth of more and more new technology solutions and applications in equipment.
The customer requested precise contour heat treatment of each of the main journal and connecting rod neck of the crankshaft. During the heat treatment process, the workpiece is deformed due to the processing process. Therefore, the crankshaft quenching machine is required not only to quench the workpiece but also to monitor and correct it. Today's manufacturing processes require “immediateness†and single-piece production, and this change keeps us away from mass production and furnace heat treatment in the past. In addition, a smaller footprint is also the primary reason for induction heat treatment equipment.
As a result, the EFD Group has developed a new type of equipment that combines the requirements of the automotive, heavy-duty trucks and other heavy equipment industries.
New models for crankshaft fillet quenching
Some crankshaft designs require quenching the fillet area of ​​the crankshaft. EFD has designed a new sensor and patented it. The heat transfer of this highly efficient sensor is exactly the same as the heat treatment requirements.
In addition to the correct sensor design, the power must be adjusted with the crank angle of rotation. EFD's new crankshaft quenching machine is designed with an NC shaft for workpiece rotation control so that power can be varied according to the angular position of the crankshaft.
EFD has also developed a unique process for crankshaft deformation control. By measuring the deformation of the crankshaft caused by the previous heating, the subsequent quenching process will be automatically adjusted based on the last measured deformation value. This process is done in the device control and is not counted in the processing time of the device. With this adjustment, the deformation value can be controlled within 0.15 mm for a four-cylinder steel crankshaft.
Temper
EFD has done a lot of research work in the induction tempering process. For induction tempering, there are two common solutions: the first is to reheat the workpiece again, and the second is to use the waste heat from the quenching process.
For induction heating tempering, the workpiece is reheated with low power after quenching. The advantage of this process is that the tempering temperature can be fully controlled regardless of the quality and temperature of the quenching medium.
Tempering with residual heat (or self-tempering) is achieved by shortening the quenching time and tempering with the remaining waste heat. The risk of this process is that the quenching cooling rate during quenching must be controlled very accurately. The temperature, time, flow rate and quenching medium concentration of the quenching must be maintained and monitored to give the workpiece a consistent outlet temperature. The advantage is to save costs and improve the beat.
Regardless of which tempering process is used, there must be a cooling station to allow the workpiece to cool to room temperature before cutting. 1 2 Next page
The crankshaft not only converts the reciprocating motion of the piston into a rotary motion, but must also absorb the vibration generated by the alternating cycle of fuel explosion. During the entire life of the engine, the crankshaft is subjected to torque and periodic sinusoidal bending. When the engine is running, this critical component will withstand continuous high-strength stress cycles. Therefore, the critical fatigue strength must be considered in the design. The crankshaft may It is the most resistant part of the engine. This special and complex function determines the complexity of the crankshaft structure, resulting in a complex heat treatment process. This is why induction hardening technology is increasingly used in the heat treatment of these complex parts.