Title:
WIRE ELECTRIC DISCHARGE MACHINE FOR DISCRIMINATING WHETHER WORK-PIECE CAN BE ELECTRICALLY DISCHARGED
Document Type and Number:
Japanese Patent JP2016036896
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wire electric discharge machine having a function for discriminating whether a work-piece can be electrically discharged.SOLUTION: A wire electric discharge machine 30 operates a wire electrode 1 in a direction on which the work electrode 1 contacts a work-piece 2 in the state that an application pulse of a constant voltage is periodically or always generated for the wire electrode 1. When an electric conductance of the work-piece 2 is large, an electric current flows between the wire electrode 1 and a pole of the work-piece 2 by contact between the wire electrode 1 and the work-piece 2, lowering of an application voltage is detected, and consequently, it is discriminated that the work-piece 2 comprises a work material which can be electrically discharged. Further, when the electric conductance of the work-piece 2 is small, lowering of the application voltage is not detected, and finally, the wire electrode 1 does not withstand a stress received from the work-piece 2 and breaking of the wire electrode 1 is detected, and consequently, it is discriminated that the work-piece 2 comprises a work material which cannot be electrically discharged.SELECTED DRAWING: Figure 4
Inventors:
NISHIKAWA AKIRA
Application Number:
JP2014163797A
Publication Date:
March 22, 2016
Filing Date:
August 11, 2014
Export Citation:
Assignee:
FANUC LTD
International Classes:
B23H7/02; B23H7/10
Domestic Patent References:
| JPH11221718A | 1999-08-17 | |||
| JPH08197335A | 1996-08-06 | |||
| JPS63109915A | 1988-05-14 | |||
| JPS61121825A | 1986-06-09 | |||
| JP2013226612A | 2013-11-07 | |||
| JPH03123621U | 1991-12-16 | |||
| JPS60177824A | 1985-09-11 | |||
| JPS6274531A | 1987-04-06 | |||
| JPS60186325A | 1985-09-21 |
Foreign References:
| US20100038258A1 | 2010-02-18 | |||
| US20090101627A1 | 2009-04-23 |
Attorney, Agent or Firm:
Aiwa Patent Business Corporation