Wire electrode type electric discharge machining device.

摘要

A wire electrode type electric discharge machining device comprises: a wire electrode (10) confronting a workpiece (16) with a small space therebetween, wherein electric discharge is caused to take place in the small space to machine said workpiece (16); upper wire guide means (12) for slidably supporting said wire electrode (10) above said workpiece (16); lower wire guide means (14) for slidably supporting said wire electrode (10) below said workpiece (16) driving means for supporting and moving said workpiece (16) relative to said wire electrode (10) in the horizontal direction; a lower arm (26) for holding said lower wire guide (12) at a position confronting said upper wire guide means (14). In the electric discharge machining device, a protecting cover (40) is provided for covering said lower arm (26) with a space therebetween. Also, splash preventing means (28) is provided which is movable with expansion and contraction with the movement of said workpiece (16) for preventing machining solution jetted toward the small space between said workpiece (16) and said wire electrode (10) from splashing, and holding means for fixedly holding said splash preventing means (28).