Precise motion control method based on position pressure automatic compensation

Abstract

The invention belongs to the technical field of presses, and particularly relates to a precise motion control method based on position pressure automatic compensation. The precise motion control method comprises the following steps: under a pressure control module of a press, making difference between a given pressure value and a press pressure measured value of a pressure sensor; and calculatingregulating results according to an anti-integration saturation incremental type PID algorithm. The precise motion control method solves the problem that a rotational type press cannot achieve a stamping process maximum value at a lower dead point, has an automatic pressure compensating function, and makes up the function defects of a conventional 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