Wire electric discharge machining device

Abstract

A wire electric discharge machining device comprises a wire electrode disposed spaced from an object to be machined and a constant voltage power supply for supplying a high-frequency voltage between the object to be machined and the wire electrode, and generates electric discharge between the object to be machined and the wire electrode by the application of the high-frequency voltage to machine the object to be machined. The wire electric discharge machining device further comprises: a current measuring means for measuring the value of current flowing from the constant voltage power supply; a determination means for, based on the measured current value and the variation value of the current value, determining an inter-electrode state that is a state between the object to be machined and the wire electrode; and a control means for, based on the determined inter-electrode state, controlling the space between the object to be machined and the wire electrode.

Description

technical field [0001] The present invention relates to a wire-electrode electric discharge machining device, which applies a voltage between a wire electrode and a workpiece as another electrode disposed opposite to the wire electrode at a predetermined distance, that is, between electrodes, to generate intermittent discharge, and to treat the workpiece. for processing. Background technique [0002] An electrical discharge machining device is a device that applies a voltage between a tool electrode such as a wire electrode and the workpiece (hereinafter referred to as "machining gap" or "inter-electrode gap") to generate electrical discharge and perform machining. It is known that in an electrical discharge machining device, by applying a high-frequency voltage between electrodes, a short-duration electric discharge is generated at a high repetition rate to obtain a finely machined surface, and various techniques have been disclosed (for example, refer to Patent Documents 1...

AI Technical Summary

Problems solved by technology

[0011] However, even in finishing machining, if the required machining amount changes due to deformation of the workpiece, etc., using constant feed, lines will be formed on the machined surface and the marks will remain.

In other words, it is difficult to use a high-frequency power supply when the amount of processing is likely to fluctuate

In addition, in the first cut, it is also difficult to use high-frequency power

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