Control device and control method of press

Abstract

The invention relates to a control device of a press. The control device comprises at least one servo motor for driving the press, a motion controller and at least one servo driver having the same number as the at least one servo motor. The servo drivers are electrically connected with the servo motors in a one-to-one correspondence and drive the corresponding servo motors to rotate. All the servodrivers are electrically connected with the motion controller, and drive current signals of the corresponding servo motors are fed back to the motion controller. Each servo motor is equipped with anencoder, and the encoder is electrically connected through the corresponding servo driver to the motion controller and feeds back a position signal of the corresponding servo motor to the motion controller. The control device of the press according to the invention realizes the torque closed-loop control and position closed-loop control of the press without addition of a pressure sensor or a position sensor, the torque feedback delay and the position feedback delay are low, and the control precision is high.

Description

technical field [0001] The invention relates to the technical field of press control, in particular to a control device and a control method for a press. Background technique [0002] Presses generally realize various complex movements through mechanical cams or electronic cams. The traditional mechanical cam has the disadvantages of complex mechanical structure, easy wear and tear after years of use, difficult replacement, single and immutable motion track. Therefore, most of the existing presses use electronic cams, and the electronic cams all adopt the speed control method. The positioning accuracy of the simple speed control method is low, and it cannot meet the requirements when processing materials with high precision requirements. If there is a higher positioning accuracy requirement, additional position sensors and pressure sensors need to be added on the basis of the speed control method to achieve position closed-loop feedback and torque closed-loop feedback. The ...

AI Technical Summary

Problems solved by technology

The traditional mechanical cam has the disadvantages of complex mechanical structure, easy wear and tear after years of use, difficult replacement, single and immutable motion track

Therefore, most of the existing presses use electronic cams, and the electronic cams all adopt the speed control method. The positioning accuracy of the simple speed control method is low, and it cannot meet the requirements when processing materials with high precision requirements.

If there is a higher positioning accuracy requirement, additional position sensors and pressure sensors need to be added on the basis of the speed control method to achieve position closed-loop feedback and torque closed-loop feedback. The increase of position sensors and pressure sensors will inevitably lead to an increase in cost, and the position sensor And the feedback signal delay of the pressure sensor is high, resulting in large errors in pressure feedback and position feedback

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