Electric discharge machine and machining fluid cooling device

Abstract

An electric discharge machine controls temperature fluctuations of machining fluid discharged by a discharge pump so as to improve machining accuracy, and a machining fluid cooling device keeps the temperature of the discharged machining fluid constant regardless of the operating state of the discharge pump. The electric discharge machine pumps machining fluid in a temperature controlled clean fluid tank with a discharge pump and discharges the machining fluid to a machining area through piping, and has a machining fluid cooling device for cooling machining fluid discharged from the discharge pump. The machining fluid cooling device passes a portion of the piping through the clean fluid tank and exchanges heat between the machining fluid inside the piping and the clean fluid in the clean fluid tank, thus dispersing the heat added from the discharge pump to the clean fluid side and lowering the temperature of the machining fluid inside the piping.

Description

technical field [0001] The present invention relates to an electrical discharge machine in which working fluid is supplied to an electrical discharge machining zone, and particularly to a working fluid cooling device for cooling the working fluid, and an electrical discharge machining device provided with the working fluid cooling device machine. Background technique [0002] In a wire-cut electrical discharge machine, a workpiece is machined by spark discharge between the workpiece and a wire electrode. Working fluid is supplied by a pump to the workpiece and the wire electrode, thereby removing debris while cooling the EDM zone to prevent temperature rise. [0003] The faster the processing speed, the greater the pressure at which the working fluid is supplied to the processing zone. As a result, the faster the entrapped slag is removed from the processing zone. Furthermore, the cooling effect on the wire (the temperature of the wire increases due to the electric discha...

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Problems solved by technology

[0014] Therefore, finishing is performed at the position of the wire electrode route during rough machining, and there is a gap between the rough machining route and the finishing route, leading to poor machining accuracy

[0015] As mentioned above, although the temperature of the traditional working fluid is controlled, this temperature control is carried out in the clean liquid tank on the inlet side of the working fluid discharge pump, and the working fluid discharged on the discharge side of the working fluid discharge pump There is no temperature control on the pump, so the temperature fluctuation of the working fluid caused by the working fluid discharge pump itself is not considered

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