Workpiece mounting table for electric discharge machine

摘要

A workpiece mounting table (20) for an electric discharge machine, which machines a workpiece (12) by discharging electricity between an electrode and the workpiece (12) in an interior of a work tank (6) and removing a surface of the workpiece (12), includes a surface-plate mounting table (3) made of a conductive material and arranged at the bottom of the work tank (6), a plurality of insulating materials (2), each of which has a flat shape and is arranged and fixed on the surface-plate mounting table (3) with a gap (4) between the insulating materials (2) to constitute an insulating flat plate (30), and a surface plate (1) made of a metal material, fixed on the insulating flat plate (30) and insulated from the surface-plate mounting table (3) by the insulating flat plate (30), for fixing thereon the workpiece (12).

主权项

1. A workpiece mounting table for an electric discharge machine that machines a workpiece by discharging electricity between an electrode and the workpiece in an interior of a work tank and removing a surface of the workpiece, the workpiece mounting table comprising:
a surface-plate mounting table, made of an electrically conductive material, arranged at a bottom of the work tank; a plurality of insulating plates, made of an electrically insulating material, each of which has a flat shape and is arranged and fixed on the surface-plate mounting table with a gap between the plurality of insulating plates to constitute an electrically insulating flat plate; and a surface plate, made of a metal material, fixed on the electrically insulating flat plate and electrically insulated from the surface-plate mounting table by the electrically insulating flat plate, for fixing thereon the workpiece, wherein the surface-plate mounting table includes a downwardly-recessed discharging shaped portion at a portion corresponding to the gap between the plurality of insulating plates.