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GB2012648A - Electric spark erosion machining - Google Patents

Electric spark erosion machining

Info

Publication number
GB2012648A
GB2012648A GB7903769A GB7903769A GB2012648A GB 2012648 A GB2012648 A GB 2012648A GB 7903769 A GB7903769 A GB 7903769A GB 7903769 A GB7903769 A GB 7903769A GB 2012648 A GB2012648 A GB 2012648A
Authority
GB
United Kingdom
Prior art keywords
circuit
voltage
spark erosion
open
gap
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
GB7903769A
Other versions
GB2012648B (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.)
GLEVUM ELECTRONIC EQUIPMENT LT
Original Assignee
GLEVUM ELECTRONIC EQUIPMENT LT
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 GLEVUM ELECTRONIC EQUIPMENT LT filed Critical GLEVUM ELECTRONIC EQUIPMENT LT
Priority to GB7903769A priority Critical patent/GB2012648B/en
Publication of GB2012648A publication Critical patent/GB2012648A/en
Application granted granted Critical
Publication of GB2012648B publication Critical patent/GB2012648B/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
    • 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
    • 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
    • B23H7/18—Electric circuits specially adapted therefor, e.g. power supply for maintaining or controlling the desired spacing between electrode and workpiece

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

An electrical spark erosion machine in which a monitor distinguishes arcing from sparking by the incidence of open circuit. A gap between a workpiece 10 and a tool electrode 11 is servomechanically regulated and electrical pulses from a pulse generator 14 are fed to the gap. A capacitor C2 is charged to a voltage which closely approaches the peak open-circuit voltage by the said pulses which occur during open-circuit. If arcing occurs the capacitor discharges to a voltage less than that set by a zener diode ZD1 and a relay RL1 is deenergized; the retraction of the tool or the giving of an alarm is initiated thereby. <IMAGE>
GB7903769A 1977-11-29 1979-02-02 Electrical spark erosion machining Expired GB2012648B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7903769A GB2012648B (en) 1977-11-29 1979-02-02 Electrical spark erosion machining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4972277 1977-11-29
GB7903769A GB2012648B (en) 1977-11-29 1979-02-02 Electrical spark erosion machining

Publications (2)

Publication Number Publication Date
GB2012648A true GB2012648A (en) 1979-08-01
GB2012648B GB2012648B (en) 1982-12-01

Family

ID=26266531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7903769A Expired GB2012648B (en) 1977-11-29 1979-02-02 Electrical spark erosion machining

Country Status (1)

Country Link
GB (1) GB2012648B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159109A1 (en) * 1984-02-01 1985-10-23 Nec Corporation Apparatus for detecting discharge gap in electric discharge machining
GB2202177A (en) * 1987-03-21 1988-09-21 Aeg Elotherm Gmbh Electro-chemical processing of work-pieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159109A1 (en) * 1984-02-01 1985-10-23 Nec Corporation Apparatus for detecting discharge gap in electric discharge machining
GB2202177A (en) * 1987-03-21 1988-09-21 Aeg Elotherm Gmbh Electro-chemical processing of work-pieces
US4814052A (en) * 1987-03-21 1989-03-21 Aeg-Elotherm Gmbh Method for the electrochemical processing of workpieces
GB2202177B (en) * 1987-03-21 1991-01-30 Aeg Elotherm Gmbh Method for the electro-chemical processing of work-pieces.

Also Published As

Publication number Publication date
GB2012648B (en) 1982-12-01

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Legal Events

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