GB2016346A - Spark erosion machines - Google Patents

Spark erosion machines

Info

Publication number
GB2016346A
GB2016346A GB7913211A GB7913211A GB2016346A GB 2016346 A GB2016346 A GB 2016346A GB 7913211 A GB7913211 A GB 7913211A GB 7913211 A GB7913211 A GB 7913211A GB 2016346 A GB2016346 A GB 2016346A
Authority
GB
United Kingdom
Prior art keywords
mark
space ratio
conditions
spark gap
steps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7913211A
Other versions
GB2016346B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGEMASPARK Ltd
Original Assignee
AGEMASPARK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AGEMASPARK Ltd filed Critical AGEMASPARK Ltd
Priority to GB7913211A priority Critical patent/GB2016346B/en
Publication of GB2016346A publication Critical patent/GB2016346A/en
Application granted granted Critical
Publication of GB2016346B publication Critical patent/GB2016346B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
    • B23H7/16—Electric circuits specially adapted therefor, e.g. power supply for preventing short circuits or other abnormal discharges by altering machining parameters using adaptive control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
    • B23H1/024—Detection of, and response to, abnormal gap conditions, e.g. short circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Control apparatus for a spark erosion machine, which includes means for monitoring the conditions at the spark gap of the machine and means for controlling the mark- to-space ratio of pulses fed from a pulsed power supply to the gap in accordance with the monitored spark gap conditions, has means for reducing the mark-to-space ratio to a minimum (A, HOLD) whenever a tendency towards short circuit conditions is detected at the spark gap and thereafter, when said tendency has been removed, increasing the mark-to-space ratio in a sequence of successive steps (B), the maximum number of possible steps (C, E) for the next sequence of steps being reduced each time the mark-to- space ratio is reduced to the minimum (A, HOLD). <IMAGE>
GB7913211A 1978-01-17 1979-04-17 Spark erosion machines Expired GB2016346B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7913211A GB2016346B (en) 1978-01-17 1979-04-17 Spark erosion machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB190278 1978-01-17
GB7913211A GB2016346B (en) 1978-01-17 1979-04-17 Spark erosion machines

Publications (2)

Publication Number Publication Date
GB2016346A true GB2016346A (en) 1979-09-26
GB2016346B GB2016346B (en) 1982-02-17

Family

ID=26237060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913211A Expired GB2016346B (en) 1978-01-17 1979-04-17 Spark erosion machines

Country Status (1)

Country Link
GB (1) GB2016346B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166269A (en) * 1984-08-27 1986-04-30 Amada Co Ltd A method of and an apparatus for controlling an electric discharge machine
GB2171822A (en) * 1984-10-05 1986-09-03 Amada Co Ltd Method and apparatus for controlling an electric discharge machine
US5187341A (en) * 1988-11-11 1993-02-16 Graell Alberto C Method of reducing the wear of the electrode in machine tools using electro-erosion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166269A (en) * 1984-08-27 1986-04-30 Amada Co Ltd A method of and an apparatus for controlling an electric discharge machine
US4673791A (en) * 1984-08-27 1987-06-16 Amada Company, Limited Method and apparatus for controlling an electric discharge machine
GB2171822A (en) * 1984-10-05 1986-09-03 Amada Co Ltd Method and apparatus for controlling an electric discharge machine
US5187341A (en) * 1988-11-11 1993-02-16 Graell Alberto C Method of reducing the wear of the electrode in machine tools using electro-erosion

Also Published As

Publication number Publication date
GB2016346B (en) 1982-02-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee