GB1531806A - Electrochemical machining - Google Patents

Electrochemical machining

Info

Publication number
GB1531806A
GB1531806A GB2168876A GB2168876A GB1531806A GB 1531806 A GB1531806 A GB 1531806A GB 2168876 A GB2168876 A GB 2168876A GB 2168876 A GB2168876 A GB 2168876A GB 1531806 A GB1531806 A GB 1531806A
Authority
GB
United Kingdom
Prior art keywords
drilling
negative
electro
workpiece
chemical
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.)
Expired
Application number
GB2168876A
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
Application filed by TRW Inc filed Critical TRW Inc
Priority to GB2168876A priority Critical patent/GB1531806A/en
Publication of GB1531806A publication Critical patent/GB1531806A/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
    • 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

Landscapes

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

Abstract

1531806 Electro-chemical drilling TRW Inc 25 May 1976 21688/76 Heading C7B Electro-chemical drilling in which cathodic electrolyte is impinged upon an anodic workpiece from a hollow insulating cathode utilizes a negative DC with superimposed negative pulses having a ripple of 75-600% of the DC component, the pulses constituting the sole source of drilling current and having an amplitude below the spark discharge threshold. A sawtooth pulse of frequency 60-720Hz may be used having an RMS voltage of 100-800 and negative peaks up to 1200V. The drilling gap may be fixed and the voltage and current periodically increased, particularly at the moment when the hole breaks through the workpiece. Alternatively the drill may move into the hole as drilling proceeds.
GB2168876A 1976-05-25 1976-05-25 Electrochemical machining Expired GB1531806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2168876A GB1531806A (en) 1976-05-25 1976-05-25 Electrochemical machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2168876A GB1531806A (en) 1976-05-25 1976-05-25 Electrochemical machining

Publications (1)

Publication Number Publication Date
GB1531806A true GB1531806A (en) 1978-11-08

Family

ID=10167177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2168876A Expired GB1531806A (en) 1976-05-25 1976-05-25 Electrochemical machining

Country Status (1)

Country Link
GB (1) GB1531806A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee