Bending machine slide block positioning compensation method, system, equipment and numerical control system

Abstract

The invention discloses a bending machine sliding block positioning compensation method, system, equipment and numerical control system. The method comprises the steps that the target bending angle ofa bending machine on a workpiece and parameter data of the workpiece and a mould are obtained, the target data is obtained, the depth of a bending machine sliding block is calculated according to thetarget data, and the target position of the sliding block is obtained; commands for the sliding block to reach the target position are obtained, and a motor is driven to operate to drive the slidingblock to execute the commands; the actual position of the sliding block after executing the commands is obtained through a motor encoder, and a first error between the actual position and the target position is calculated; whether the first error is larger than a threshold error or not is judged, if the first error is larger than the threshold error, a first compensation procedure is started to move the sliding block to the target position; and the first compensation procedure is the procedure which moves the sliding block to the target position by changing the number of pulses which are sentby a bending machine controller and used for controlling the motor to operate. By means of the bending machine sliding block positioning compensation method, system, equipment and numerical control system, the accuracy of bending machine sliding block positioning is improved, and then the accuracy of the bending position and bending angle in machining workpieces by the bending machine is improved.

Description

technical field [0001] The invention relates to the field of bending machines, in particular to a positioning compensation method, system, equipment and numerical control system for a slider of a bending machine. Background technique [0002] At present, a large part of the bending machine does not use the numerical control system to control the positioning of the back gauge, and uses a manual method to control the positioning of the back gauge of the bending machine. Such a bending machine has low positioning accuracy, inconvenient operation, and low production efficiency. And other issues. There is also a scheme of using CNC system + frequency converter + low-precision encoder for some bending machines. This scheme meets the needs of a small number of users, because the CNC system controls the frequency converter through relays, so there is a relatively large Control time delay, and the compensation ability of this control system is very low, which cannot meet the custome...

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Problems solved by technology

[0002] At present, a large part of the bending machine does not use the numerical control system to control the positioning of the back gauge, and uses a manual method to control the positioning of the back gauge of the bending machine. Such a bending machine has low positioning accuracy, inconvenient operation, and low production efficiency. And other issues

There is also a scheme that adopts CNC system + frequency converter + low-precision encoder for some bending machines. This scheme meets the needs of a small number of users, because the CNC system controls the frequency converter through relays, so there is a relatively large Control time delay, and the compensation ability of this control system is very low, which cannot meet the customer's requirements for bending accuracy. The positioning speed of this solution using CNC system + frequency converter + low-precision encoder is very low when used, because The rigidity of the frequency converter is insufficient, and when the speed is too fast, it will produce overshoot phenomenon, resulting in the problem of inaccurate positioning, and when the speed is too low, it will cause the problem of low production efficiency

[0003] There are also some bending machines that adopt the scheme of numerical control system + low-precision servo. This scheme can meet the needs of some users for bending position and bending angle, but it cannot meet the needs of users who have high-precision requirements for bending angle and bending position. needs

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