FR2344372A1 - Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte - Google Patents

Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte

Info

Publication number
FR2344372A1
FR2344372A1 FR7616398A FR7616398A FR2344372A1 FR 2344372 A1 FR2344372 A1 FR 2344372A1 FR 7616398 A FR7616398 A FR 7616398A FR 7616398 A FR7616398 A FR 7616398A FR 2344372 A1 FR2344372 A1 FR 2344372A1
Authority
FR
France
Prior art keywords
negative
electrode
electrolyte
pulses
superimposed
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
FR7616398A
Other languages
French (fr)
Other versions
FR2344372B1 (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.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW Inc
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
Priority claimed from US05/666,767 external-priority patent/US4004992A/en
Application filed by TRW Inc filed Critical TRW Inc
Publication of FR2344372A1 publication Critical patent/FR2344372A1/en
Application granted granted Critical
Publication of FR2344372B1 publication Critical patent/FR2344372B1/fr
Granted 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
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • B23H9/16—Making holes using an electrolytic jet
    • 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
    • B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits

Abstract

Electrochemical drilling system which uses an insulating hollow electrode through which a highly conductive electrolyte is passed to impinge on a workpiece, has the electrolyte connected to a cathode supply consisting of a negative DC component with superimposed negative pulses. The pulses on the cathode supply provide a ripple which is 75 to 600% of the DC component and provide the sole source of drilling current, while there amplitude is insufficient to cause a spark discharge between the electrode and workpiece. Used to drill extremely small holes in tough metals such as nickel base superalloys. Conventional electrochemical drilling generally produces tapered holes and causes rapid wear of the insulating electrode. Use of pulses produces holes of more uniform dia. and reduces heat generated and the electrode wear.
FR7616398A 1976-03-15 1976-05-31 Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte Granted FR2344372A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/666,767 US4004992A (en) 1975-01-08 1976-03-15 Power supply for electrochemical machining

Publications (2)

Publication Number Publication Date
FR2344372A1 true FR2344372A1 (en) 1977-10-14
FR2344372B1 FR2344372B1 (en) 1982-10-08

Family

ID=24675388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7616398A Granted FR2344372A1 (en) 1976-03-15 1976-05-31 Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte

Country Status (7)

Country Link
JP (1) JPS52111433A (en)
CA (1) CA1077432A (en)
DE (1) DE2624070C3 (en)
FR (1) FR2344372A1 (en)
IL (1) IL49680A (en)
IT (1) IT1060755B (en)
SE (1) SE432373B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009040862A1 (en) * 2009-09-09 2011-03-10 Mtu Aero Engines Gmbh Method and device for locally removing at least one metallic layer from a component made from an alloy
DE102010032701B4 (en) * 2010-07-29 2015-04-16 Leistritz Turbomaschinen Technik Gmbh Method and device for producing a metal component
CN102658406A (en) * 2012-05-04 2012-09-12 太仓市弧螺机电有限公司 Deep hole machining device
JP6187966B2 (en) * 2013-08-26 2017-08-30 国立大学法人東京農工大学 Electrolytic machining apparatus, electrolytic machining method, and tool electrode manufacturing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2245445A2 (en) * 1973-08-13 1975-04-25 Carel Fouche Languepin Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit
FR2252901A1 (en) * 1973-12-04 1975-06-27 Trw Inc Electrochemical machining metal - using non-conductive inert nozzles and cathodically charged electrolyte

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2245445A2 (en) * 1973-08-13 1975-04-25 Carel Fouche Languepin Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit
FR2252901A1 (en) * 1973-12-04 1975-06-27 Trw Inc Electrochemical machining metal - using non-conductive inert nozzles and cathodically charged electrolyte

Also Published As

Publication number Publication date
DE2624070A1 (en) 1977-09-29
DE2624070B2 (en) 1980-04-24
IL49680A (en) 1981-07-31
SE7605980L (en) 1977-09-16
JPS52111433A (en) 1977-09-19
SE432373B (en) 1984-04-02
DE2624070C3 (en) 1981-01-08
IL49680A0 (en) 1976-08-31
IT1060755B (en) 1982-09-30
FR2344372B1 (en) 1982-10-08
CA1077432A (en) 1980-05-13

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse