Title:
CONTROLLER FOR WIRE ELECTRIC DISCHARGE MACHINE
Document Type and Number:
Japanese Patent JP3808444
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide stable machining with high surface accuracy without requiring adjustment or the like of a gain in wire electrode feed control.
SOLUTION: A discharge gap detection unit 6 detects a voltage between the wire electrode and a workpiece. An amount-of-machining change detection unit 7 finds an average machining voltage, and a voltage drop Es from a no-load voltage. A comparative determination unit 9 finds a ratio Es/Ex between a reference voltage drop Es stored in a reference-amount-of-machining relative value storage unit 8 and voltage Ex. A feed pulse arithmetic unit 13 finds a feed speed that makes the amount of machining constant, on the basis of the ratio Es/Ex and a predetermined feed speed, and distributes feed pulses to motors 10 and 11 to move the wire electrode 4 to the workpiece 5. Since the amount of machining is kept constant, the surface accuracy in finishing is high, and stable machining is performed.
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Inventors:
Kurihara Masaki
Kaoru Hiraga
Kaoru Hiraga
Application Number:
JP2003079935A
Publication Date:
August 09, 2006
Filing Date:
March 24, 2003
Export Citation:
Assignee:
FANUC Corporation
International Classes:
B23H7/02; B23H7/04; B23H7/20; (IPC1-7): B23H7/02
Domestic Patent References:
| JP62292317A |
Attorney, Agent or Firm:
Matsuji Takemoto
Hideo Sugiyama
Koichi Yuda
Uozumi Takahiro
Hideo Sugiyama
Koichi Yuda
Uozumi Takahiro
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