Precise Motion Control Method Based on Automatic Compensation of Position and Pressure

Abstract

The invention belongs to the technical field of presses, and in particular relates to a precise motion control method based on position pressure automatic compensation. In the position pressure control mode of the press of the present invention, the difference between the given pressure value and the press pressure measurement value of the pressure sensor is made, and then the adjustment result is calculated through the anti-integral saturation incremental PID algorithm, which solves the problem of the rotary press being dead at the bottom. The point cannot reach the maximum value of the stamping process, and it has the function of automatic pressure compensation, which makes up for the functional defects of the previous servo press.

Description

technical field [0001] The invention belongs to the technical field of presses, and in particular relates to a precise motion control method based on position pressure automatic compensation. Background technique [0002] At present, the automatic compensation in the field of presses is mainly for the automatic compensation of the slider position of the reciprocating press or the rotary crank press driven by the connecting rod. The mainstream control mode is to control the output of the mold adjustment motor to readjust the position of the bottom dead center. compensate. For example: the patent of the notification number CN102909884B discloses a punching bottom dead point position error compensation device and method. The bottom dead point detection module detects and records the bottom dead point position in real time and calculates the error of the bottom dead point position. The shaft temperature detection compensation module The temperature of the bearing is detected an...

AI Technical Summary

Problems solved by technology

This patent solves the trouble of manual mold adjustment in the past, and can detect the position of the bottom dead point of the slider and compensate for the deviation of its dead point position, but it cannot solve the precise motion control of the rotary crank press in the position pressure control mode

The specific performance is that after the crank servo press reaches a certain position and the subsequent position according to the process requirements, the control mode of the press changes from the position control mode to the pressure control mode, but due to the heat deformation of the crankshaft or the deformation of the press body or the thermal deformation of the slider. The pressure still does not reach the pressure specified value of the pressure control mode at some key points or the bottom dead center

Images