# US 2014/0197137 A1 · Workpiece mounting table for electric discharge machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197137 A1 - Document ID: US20140197137A1 - Status: Published application - Kind: A1 - Application number: 14/238,655 - Filed: 2011-10-14 - Published: 2014-07-17 - Earliest claimed: 2011-10-14 - Assignees: Mitsubishi Electric Corporation - Inventors: Yoshinori Saigusa; Hisashi Hara; Hideaki Kikuchi; Makoto Komori - Web page: https://patentgrep.com/patent/US20140197137A1 ## CPC - B23H 11/003: {Mounting of workpieces, e.g. working-tables} - B23H 1/00: Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric - B23H: WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL (processes for the electrolytic or electrophoretic production of coatings, electroforming, or apparatus therefor C25D; processes for the electrolytic removal of material from objects C25F; manufacturing printed circuits using precipitation techniques to apply the conductive material to form the desired conductive pattern H05K3/18) ## Abstract 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). ## Claims ### Claim 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 a conductive material, arranged at a bottom of the work tank; a plurality of insulating materials, each of which has a flat shape and is arranged and fixed on the surface-plate mounting table with a gap between the insulating materials to constitute an insulating flat plate; and a surface plate, made of a metal material, fixed on the insulating flat plate and insulated from the surface-plate mounting table by the 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 insulating materials. ### Claim 2 (depends on 1) The workpiece mounting table for an electric discharge machine according to claim 1, wherein the surface plate, the insulating flat plate, and the surface-plate mounting table are stacked in an inversely stepped manner. ### Claim 3 (canceled) ### Claim 4 (depends on 1) The workpiece mounting table for an electric discharge machine according to claim 1, wherein the gap is sealed with an insulation material. ### Claim 5 (depends on 1) The workpiece mounting table for an electric discharge machine according to claim 1, wherein each of the insulating flat plate and the surface plate is fixed laterally symmetrically with respect to a center of a top surface of the surface-plate mounting table. ### Claim 6 (depends on 1) The workpiece mounting table for an electric discharge machine according to claim 1, wherein the surface plate is divided into plural pieces. ### Claim 7 (depends on 1) The workpiece mounting table for an electric discharge machine according to claim 1, wherein the surface-plate mounting table is a casting, the insulating materials are ceramic plates, and the surface plate is made of stainless steel. ### Claim 8 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 a conductive material, arranged at a bottom of the work tank; a plurality of insulating materials, each of which has a flat shape and is arranged and fixed on the surface-plate mounting table with a gap between the insulating materials to constitute an insulating flat plate; and a surface plate, made of a metal material, fixed on the insulating flat plate and insulated from the surface-plate mounting table by the insulating flat plate, for fixing thereon the workpiece, wherein the gap is sealed with an insulation material. ### Claim 9 (depends on 8) The workpiece mounting table for an electric discharge machine according to claim 8, wherein the surface plate, the insulating flat plate, and the surface-plate mounting table are stacked in an inversely stepped manner. ### Claim 10 (depends on 8) The workpiece mounting table for an electric discharge machine according to claim 8, wherein each of the insulating flat plate and the surface plate is fixed laterally symmetrically with respect to a center of a top surface of the surface-plate mounting table. ### Claim 11 (depends on 8) The workpiece mounting table for an electric discharge machine according to claim 8, wherein the surface plate is divided into plural pieces. ### Claim 12 (depends on 8) The workpiece mounting table for an electric discharge machine according to claim 8, wherein the surface-plate mounting table is a casting, the insulating materials are ceramic plates, and the surface plate is made of stainless steel. ### Claim 13 (canceled) ### Claim 14 (canceled)