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While from the point of the small hole electrical discharge machining device null cylindrical electrode which is used for the process method and the same process method of the small hole which possesses the conical funnel section
While from the point of the small hole electrical discharge machining device null cylindrical electrode which is used for the process method and the same process method of the small hole which possesses the conical funnel section
PROBLEM TO BE SOLVED: To provide a method of machining a pore having a conical funnel part opened to an inlet side only by a pipe electrode for pore processing, and also to provide a pore electric discharge machining device used for the same.;SOLUTION: In the method of machining the pore, a bar-like electrode is bent from the tip thereof upward in an axial direction with a bending length h1. The bar-like electrode is bent and formed to allow a length L between the outer circumference of the tip of the bent bar-like electrode and the center of the electrode to be equal to the inlet radius R of the conical funnel part to be machined. The pore machining is carried out while the bar-like electrode which have been bent and formed is fed in the axial direction relative to a workpiece and is simultaneously rotated.;COPYRIGHT: (C)2010,JPO&INPIT
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