WIRE ELECTRIC DISCHARGE MACHINING DEVICE AND METHOD

摘要

Provided is a wire electric discharge machining device and method capable of reliably terminating a short circuit between a wire electrode and a workpiece. The invention relates to a wire electric discharge machining device that starts machining of a workpiece (3) by generating an electric discharge in a machining gap formed between the workpiece and a wire electrode (2) threaded through a start hole (4) in the workpiece. The wire electric discharge machining device includes: a tension control device (56) that controls tension of the wire electrode so as to maintain the tension at a set value; a short circuit detector (57) that detects a short circuit between the wire electrode and the workpiece; and a short circuit termination system that reduces the tension of the wire electrode and vibrates the wire electrode in order to terminate a short circuit when the short circuit detector has detected the short circuit.

主权项

1. A wire electric discharge machining device that starts machining of a workpiece by generating an electric discharge in a machining gap formed between the workpiece and a wire electrode threaded through a start hole in the workpiece, the wire electric discharge machining device comprising:
a tension control device controlling tension of the wire electrode to be maintained at a set value; a short circuit detector detecting a short circuit between the wire electrode and the workpiece; and a short circuit termination system reducing the tension of the wire electrode and vibrating the wire electrode to terminate the short circuit when the short circuit detector has detected the short circuit.