Rapid edge searching method for wire cutting machine

Abstract

The invention discloses a quick edge searching method for a wire cutting machine, which comprises the following steps of: quickly approaching the edge of a workpiece by using an electrified wire electrode, reducing the wire tension of the wire electrode, detecting the voltage or pulse change at the two ends of the wire electrode and the workpiece, and firstly enabling the wire electrode and the workpiece to perform quick relative movement approaching and reverse separation movement by using lower wire tension; finding a preliminary side position according to the change of the detection voltage; and then the wire electrode and the workpiece do low-speed relative movement approaching with higher wire tension and then do reverse separation movement, and the position close to the side is found according to the change of the detection voltage. The method can be further applied to rapid edge searching operation of circle center searching, groove width searching or plate width searching, the edge searching time is greatly shortened, and the effect of high-precision edge searching of the workpiece is achieved. Therefore, the wire electrode can perform quick edge searching and positioning on the workpiece, and in the edge searching and positioning process, the surface of the workpiece cannot be polluted due to the fact that metal powder is scraped off from the wire electrode, and the surface of the workpiece cannot be ablated and damaged.

Description

technical field [0001] The rapid edge-finding method of the wire-cutting machine of the present invention is a method applicable to wire-cutting electric discharge processing machines, especially the wire electrode that is energized can quickly approach the edge of the workpiece, and the edge-finding can be confirmed by detecting the voltage or pulse change of the wire electrode The method of the work coordinate reference point of the workpiece to be processed. Background technique [0002] The wire-cut EDM machine often needs to execute the edge-seeking program before processing in order to find the coordinate reference origin of the processed product. Generally, the wire-cut EDM machine usually moves at a slow feed rate when doing the edge-seeking positioning program. , The lower machine head approaches the workpiece synchronously, and the wire electrodes clamped by the upper and lower machine heads maintain the wire tension and wire feeding speed in the processing state. ...

AI Technical Summary

Problems solved by technology

[0006] To sum up the above, the conventional technology does not disclose the fast edge-finding with the wire electrode, and cannot quickly and automatically detect the edge-finding, so that the center coordinates of workpieces of different shapes can be confirmed, and the action behavior of the edge-finding takes a lot of time, and the conventional In the process of using the energized wire electrode to touch the workpiece for edge detection or vertical alignment, it is unavoidable to avoid the damage caused by the discharge spark ablation on the surface of the workpiece, and the scraping of metal powder (copper wire) when the workpiece touches the wire electrode (copper wire). powder), resulting in the absence of copper paste contaminated workpieces

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