Patent ID: 9138820
Filing Date: 2015-09-22
Classification: B23H

Abstract:
1. A wire aspiration device that is placed on an ejection side of first and second recovery rollers that nip a wire electrode having run through an area where a workpiece is subject to electric discharge machining from both sides of the wire electrode and ejects the wire electrode, and that aspirates the ejected wire electrode in a recovering direction, the wire aspiration device comprising: a first member having a first curved surface with a projecting portion that is in close contact with peripheral surfaces of the first and second recovery rollers, the first member being on one side of a third member; a second member having a second curved surface with a projecting portion that is in close contact with the peripheral surfaces of the first and second recovery rollers, the second member being on the other side of the third member; and the third member having a third surface and a through hole formed in a central portion of the third member to cause the ejected wire electrode to run in the recovering direction, and coupling the first and second members to form two grooves for forming an air gap with the peripheral surfaces of the first and second recovery rollers, the two grooves being disposed between the first and second curved surfaces to be in contact with the through hole, wherein a fluid spout for spouting a fluid into the through hole in the recovering direction is formed in any one of the first, second, and third members, and wherein the third surface is not flush with the first curved surface and the second curved surface.