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The difference between a servo press and an ordinary hydraulic press

Author: ComeFrom: Date:2017/8/21 16:33:20 Hits:1531
  What is servo hydraulic press?
  The servo motor drive of hydraulic press is to change the ordinary motor of drive press to servo motor, that is servo hydraulic press, also called servo press and servo press mounting machine. The slider movement curve of the servo hydraulic press can be set according to the stamping process, and the stroke is adjustable. This kind of press mainly aims at the difficult forming material, the complex shape part's high accuracy forming. The processing accuracy and the stamping efficiency of the press are greatly improved, and the flywheel, clutch and other parts are cancelled, thereby reducing the production cost of the enterprise and saving energy.
  The development of servo hydraulic press is affected by servo motor. The hydraulic motor driven by servo motor is mainly some small tonnage press. In order to break through the limitation of servo motor, hybrid drive is one direction of press development. The hybrid driving press adopts the differential wheel to realize the mixing input of the ordinary motor and the servo motor, and adopts the two degree of freedom rod system to realize the mixed closed double point press. Its characteristics are:
  (1) versatility, flexibility and high intelligence.
  Because of its servo function, the slider movement curve is no longer just a sine curve, but an arbitrary curve that can be optimized according to the process requirements.
  (2) high accuracy.
  Due to the use of linear grating to detect the position of the slider, the slider in the press all has high precision; motion control, especially in the BDC, to ensure the accuracy of the slider change within 0.01mm; to ensure the press closed height accuracy and stability in the production process, product inhibition of burr, prevent adverse products.
  (3) productivity is high.
  Servo hydraulic press because it retains the advantages of the crank press, especially the productivity is much higher than the hydraulic machine, reflects the quality of the hydraulic press machine, the production efficiency of the mechanical press". Not only that, the servo motor drive crank press can also according to different workpieces, adjust the slider stroke, in a work cycle of the need to complete a 360 degree rotation, but only a certain angle swing to complete the stamping work, which shortens the cycle time. To minimize the unnecessary stroke, greatly improve productivity.
  The servo control precision toggle press.
  This is a new type of hydraulic servo control precision press, strong versatility, is suitable for punching, blanking, bending, flanging, shallow drawing and other processes, is widely used in auto, aviation, electronics, instrumentation, electrical appliances, watches, household appliances, daily hardware and mould industries. The main actuator - AC servo motor, a motor control by the input signal and the fast response, high control precision, stable operation, at its rated speed range can output the rated torque, and has 2 to 3 times the strong overload capacity, reliable control, quick response. Therefore, AC servo motor has been widely used in automatic control system, automatic monitoring system and computing device, incremental motion control system and household appliances, in these systems and devices, it is mainly used as an executive element.
  Compared with conventional mechanical press driven by AC asynchronous motor, AC servo press has the following characteristics:
  (1) super versatility, flexibility and intelligence.
  Because of its servo function, the slider movement curve is no longer just a sine curve, but an arbitrary curve that can be optimized according to the process requirements. For example, in the controller can be stored for punching, drawing, stamping and bending process, as well as the characteristics of different materials curves, when used, different processes, different materials call different curves. This greatly improves the processing performance of the press, expanded the processing range, and its processing performance can be compared with the hydraulic press.
  (2) ultra high precision.
  Because the linear grating ruler is used to complete the closed loop control of the slider position, the slider has high motion control accuracy in the whole working process of the hydraulic press. Especially in the BDC, even in the presence of partial load, can always guarantee the slider precision changes at the micron level, so as to ensure the stability of high precision press closed in the production process, product inhibition of burr, prevent adverse product input.
  The most important difference between the servo hydraulic press and the ordinary hydraulic press is the difference of the power source. One is the use of hydraulic pressure in the hydraulic cylinder, the other is the use of compressed air as the source of power, the use of compressed air cylinder to implement the device, which is the essential difference between them.
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