A fully closed-loop electro-hydraulic servo drive method and system for a bending machine

Abstract

The invention relates to a fully closed-loop electro-hydraulic servo drive method and system for a bending machine. The method includes: during the reciprocating motion of the bending mechanism on the bending machine, the grating ruler monitors the actual movement position of the bending mechanism; The motor speed adjustment curve and the actual movement position drive the servo motor to rotate; the servo motor drives the hydraulic pump to rotate; the hydraulic pump drives the hydraulic cylinder to reciprocate; the hydraulic cylinder drives the bending mechanism to reciprocate. The full-closed-loop electro-hydraulic servo drive method and system of the bending machine provided by the present invention realize full-closed-loop monitoring of the actual motion position during the reciprocating motion of the bending mechanism, improve the control accuracy of the rotational speed of the servo motor, and enable the end of the bending mechanism to prevent Jitter, thereby improving the driving efficiency of the bending machine, effectively ensuring the bending processing accuracy of the product to be bent, thereby ensuring the yield rate of the product to be bent.

Description

technical field [0001] The invention relates to the technical field of full-closed-loop electro-hydraulic servo control, in particular to a full-closed-loop electro-hydraulic servo drive method and system for a bending machine. Background technique [0002] At present, in the bending process of bending products (for example: metal sheets), most of the following three methods are used to drive the reciprocating motion of the bending mechanism installed on the bending machine: (1) hydraulic proportional valve with hydraulic valve , the flow of hydraulic oil is controlled by the hydraulic proportional valve and the flow direction of the hydraulic oil is controlled by the hydraulic valve, and the hydraulic oil is used as the power source to drive the bending mechanism to reciprocate; (2) The synchronous servo motor cooperates with the servo pump to control The hydraulic oil flow rate of the servo pump, the rotational speed and the hydraulic oil flow rate are proportional to each...

AI Technical Summary

Problems solved by technology

[0003] The above three methods of driving the reciprocating motion of the bending mechanism are all bending a product to be bent during the movement process of the bending mechanism from the starting point to the target point, and during the movement process from the target point back to the starting point, the bending The bending machine is preparing for the next product to be bent, and the bending mechanism completes a reciprocating motion. However, during the reciprocating motion of the bending mechanism, there is a lack of full-closed-loop monitoring of the actual movement position of the bending mechanism, and it is difficult to use the actual movement position to accurately control the bending mechanism.

Images