A shear distance control method for plate shears based on plate width

Abstract

The invention discloses a shearing stroke control method for a plate shearing machine based on the plate width. A potentiometer is used for collecting voltage, and the shearing stroke of a tool rest in the vertical direction is mapped into the shearing plate width in the horizontal direction. At any shearing angle, the current shearing plate width can be deduced through voltage feedback of the potentiometer. The beforehand stopping shearing plate width is set for offsetting the influence of the motion inertia of the tool rest on the shearing stroke control. After the plate shearing machine is corrected through the algorithm in the method, at any shearing angle, the shearing plate width error can reach the shearing precision the same as the error under the calibrated shearing angle, the using requirement of a user is met, the error range is a positive value, and it is ensured that due to the too short shearing stroke, plates are scraped cannot happen. Meanwhile, the shearing efficiency is improved, energy consumption is reduced, and due to the fact that the user does not need to conduct repeated calibration on the shearing plate width or angle, usage is facilitated for the user, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a method for controlling the shear distance of a plate shearing machine, in particular to a method for controlling the shear distance of a plate shearing machine based on plate width. Background technique [0002] With the help of the moving upper blade and the fixed lower blade, the shearing machine shears, breaks and separates the board according to the required size of the board. Shearing machine is often used to cut the sheet blank with straight edge. It is mainly used in metal processing industry and belongs to a kind of forging machinery. If the shearing process is too short, the plate will be scrapped due to incomplete shearing; if the shearing process is too long, the work efficiency will be reduced and energy consumption will be increased. Therefore, precise control of the shear distance is very necessary. [0003] At present, the shear range control of the shearing machine mainly includes three methods: upper and lo...

AI Technical Summary

Problems solved by technology

This control method has certain limitations, because the potentiometer can only feed back the stroke of the tool post in the vertical direction. If the shear angle of the tool post changes, the system will not automatically adjust the corresponding relationship between the width of the sheet and the feedback value of the potentiometer. , so the cutting accuracy cannot be guaranteed. When cutting a sheet with the same width, it may not be completely cut or the sheet will go down a long distance after cutting the sheet. In order to ensure the cutting accuracy, the user needs to calibrate the sheet width again. The corresponding relationship with the feedback value of the potentiometer, this method seriously affects the shearing efficiency, and also increases the maintenance cost of the machine tool manufacturer in the later period

[0007] At present, the research in the industry on the shear distance is mainly based on the upper and lower limit switch control and time relay control, and the potentiometer control is rarely used, mainly because the control accuracy of the board width cannot meet the user's requirements.

Images