Wire electric discharge machine

Abstract

The invention provides a wire electric discharge machine. A wire electric discharge machine includes a wire electrode deflection detecting unit detecting a deflection of a fed wire electrode at the time of a wire automatic wire connection, a wire feeding unit feeding the wire electrode after the wire electrode deflection detecting unit detects the deflection of the wire electrode, a clocking unit clocking a time taken after the deflection of the wire electrode is detected, a determining unit determining whether the wire electrode deflection detecting unit detects the deflection of the wire electrode after the time clocked by the clocking unit exceeds a predetermined time, and a unit executing a retry operation of the automatic wire connection to rewind the wire electrode in a case where the determining unit detects the deflection of the wire electrode and continuing to feed the wire electrode in a case where the deflection of the wire electrode is not detected.

Description

technical field [0001] The present invention relates to a wire electric discharge machine, and more particularly to a wire electric discharge machine provided with a function of detecting bending of a wire electrode during automatic wiring. Background technique [0002] In online electrical discharge machining, wiring failures such as clogging of the tip of the wire electrode fed out by automatic wiring may occur. In such a case, generally, the wire electrode fed out is rewound to remove the wiring fault, and then the retry operation of feeding out the wire is performed again. [0003] As a prior art related to automatic wiring of a wire electrical discharge machine, Japanese Patent Application Laid-Open No. 7-24644 discloses the following prior art: In the case of a blockage at the front end of a wire electrode, detection is made by sending out the wire electrode with a roller. The resulting bend is used to detect wiring faults. In this prior art, the detection electrodes...

AI Technical Summary

Problems solved by technology

It takes time to perform unnecessary retry operations, and the front end of the wire electrode may be blocked again

[0007] In addition, in the technology disclosed in Japanese Patent Application Laid-Open No. 9-108950, the bending of the wire electrode is not detected until the tip of the wire electrode is sent out to the length to pass the workpiece.

Therefore, when a wiring failure occurs in the initial stage of automatic wiring, the length of the wire electrode sent out until the bending of the wire electrode is detected is long, and serious problems such as wire electrode entanglement may not be eliminated by moving the shaft. wiring fault

In particular, when a workpiece with a thick plate thickness is used, the influence is large

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