PURPOSE: To guide stably a wire electrode and to improve the accuracy in holding the tip position of the wire electrode by attaching a tip guide having high heat resistance to the tip of a current-conducting member.
CONSTITUTION: A chip 10 for current conduction consists of a member 11 for current conduction of chromium copper or the like having good electrical conductivity and fairly high resistance to wear and a guide 12 consisting of a material having an insulating characteristic and having heat resistance. Said guide is attached to the tip of the member 11 to unite the entire part to one body. When a wire electrode 1 having a bending set is applied to the chip 10 and if the length L3 of, for example, the guide 12 is made to about 2/3 the extension L2, 2/3 of the extension L2 is held by the guide 12 and the fluctuation in the tip position of the electrode 1 is kept within about 1/3.
TAKUWA TOSHIAKI
KUSANO KAZUYOSHI
| JPS5226630B2 | 1977-07-15 | |||
| JP57082484B | ||||
| JP51099725B | ||||
| JPS456745Y1 | 1970-04-03 |