著者

Yoshiyuki UNO Osamu ENDO Tbshikatsu NAKAJIMA

出版者

Japan Society of Electrical Machining Engineers

雑誌

Journal of The Japan Society of Electrical Machining Engineers (ISSN:0387754X)

巻号頁・発行日

vol.25, no.49, pp.9-22, 1991-07-20 (Released:2010-03-12)

参考文献数

13

被引用文献数

2

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The purpose of this study is to make clear the crater generation mechanism in electrical dischage machining with a single pulse method, investigating the impact force acting on the workpiece, the shape of crater, the discharge current, the surface of crater, the removed chip and so on. Main conclusions obtained are as follows:(1) The impact force acting on the workpiece in a single pulse dischage reaches a maximum value after a few micro seconds from the beginning of spark regardless of the discharge duration.(2) The melted volume by a single pulse discharge has a close relation to the discharge energy, and the relation in the air is identical with that in the dielectric fluid.(3) The metal removal in a single pulse discharge is mainly caused by melting and vaporization of material for the discharge duration over 10 micro seconds, while impact operation plays main role for the discharge duration under 10 micro seconds.(4) Spherical chip produced in electrical discharge includes the composition of tool electrode material, while fragmental chip doesn't.