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整流板
A rectifying plate 22 has the function of rectifying the turbulence of the working fluid inside the nozzle, and a multiplicity of small holes 22a are provided therein.
整流板22具有对喷嘴内部的加工液的紊流予以整流的作用,设有许多小直径孔22a。
In addition, although the rectifying plate 35 alleviates the curving and deflection of the fluid caused by the occurrence of turbulence of the working fluid inside the pool 36, and allows the working fluid to jet out after straightly upwardly stabilizing the directionality of the working fluid jetting out from the jetting hole 47a in the working fluid nozzle 47, there has been a problem in that a large pressure loss is produced.
As a central hole of a rectifying plate 35 having a plurality of holes 35a for the working fluid to flow therethrough is engaged with and fixed to this cylindrical portion, a pool 36 is formed between a channel outlet of the guide attaching plate 31 and the holes 35a of the rectifying plate 35.
A jet nozzle 40 for guiding the wire electrode 2 into a guide hole in the lower wire guide 25 by means of the fluid has its outer peripheral surface fixed to an inner peripheral surface of the rectifying plate 35, and has a collar whose top surface is fixed to a holding portion 35b of the rectifying plate 35 via a spring 45, the jet nozzle 40 and the like being covered with a working fluid nozzle 47.
Further, after the working fluid passes through the channel in the guide attaching plate 31 from the pipe 55, and temporarily stays in the pool 36 with its pressure thereby increased, the working fluid passes through the holes 35a in the rectifying plate 35 and undergoes conversion to velocity energy, then stays in a space portion formed by the rectifying plate 35 and the inner surface of the working fluid nozzle 47 and is converted to pressure energy. The high-speed fluid is then jetted out from the jetting hole 47a in the working fluid nozzle 47 to the gap between the electrodes as the velocity energy.
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