Wire cut electric discharge machining device

Abstract

A wire cut electric discharge machining device comprising a work tank (31) accommodating a work piece (8), a wire cutting device (11) provided in the work tank for cutting into small pieces wire electrodes used to generate discharging in a gap formed between a wire electrode (3) and the work piece, a container (12) provided outside the work tank for collecting small pieces of wire, and a flexible guide tube (13) connected to the wire cutting device at one end (13A) and oriented to the container at the other end (13B). The small pieces of wire are moved into the container carried by the flow of fluid (15) introduced into the guide tube. The container includes a filter (12A) for separating the small pieces of wire from the fluid.

Description

technical field [0001] The present invention relates to a wire-cut electrical discharge machining apparatus for machining a workpiece by using a running wire electrode and generating a discharge in a gap formed between the wire electrode and the workpiece to be machined. In particular, the present invention relates to a wire-cut electrical discharge machine having a recovery device for recovering a wire electrode that has been used to generate electrical discharge. Background technique [0002] The following wire-cut electrical discharge machining devices are well known: a continuous wire-shaped electrode unwound from a wire supply source such as a small winch or a reel is sent to the inside of a workpiece box or container for storing workpieces, and is formed on the The gap between the wire electrode and the workpiece, the so-called "spark gap", is used to generate an electrical discharge which is then rewound by the recovery drum. In such a wire-cut electric discharge mac...

AI Technical Summary

Problems solved by technology

In this way, the wire pulling device, since it constitutes a part of the tension control mechanism, abnormalities occurring on the running path between the side connecting the spark gap and the wire pulling device, such as the detachment of the wire from its running path or the If the running is not smooth, etc., it will be transmitted to the wire electrode running on the side of the spark gap, which may have a bad influence on the machining accuracy.

In particular, when the leading end of a wire with a diameter of 0.1 mm or less is automatically passed through the initial hole in the workpiece and further reaches the wire pulling device, the above-mentioned abnormal situation is likely to occur.

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