GB1505065A - Methods and apparatus for electrically machining a workpiece - Google Patents

Methods and apparatus for electrically machining a workpiece

Info

Publication number
GB1505065A
GB1505065A GB1302974A GB1302974A GB1505065A GB 1505065 A GB1505065 A GB 1505065A GB 1302974 A GB1302974 A GB 1302974A GB 1302974 A GB1302974 A GB 1302974A GB 1505065 A GB1505065 A GB 1505065A
Authority
GB
United Kingdom
Prior art keywords
workpiece
electrode
machining
capacitor
electrolyte
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
GB1302974A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB1302974A priority Critical patent/GB1505065A/en
Priority to DE19752512331 priority patent/DE2512331A1/en
Priority to FR7508977A priority patent/FR2264625B1/fr
Priority to IT2161575A priority patent/IT1037143B/en
Priority to CH374775A priority patent/CH603301A5/xx
Priority to JP3526175A priority patent/JPS50157998A/ja
Priority to US05/806,063 priority patent/US4159407A/en
Publication of GB1505065A publication Critical patent/GB1505065A/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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/30—Application in turbines
    • F05B2220/302—Application in turbines in gas turbines

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

1505065 Electro-erosion ROLLS-ROYCE Ltd 14 March 1975 [23 March 1974] 13029/74 Heading B3V [Also in Division C7] A conically shaped passage is formed in a workpiece 44 by a combined electrochemical and electrical discharge machining method by flowing a weak electrolyte along the exterior surface of an elongate consumable electrode 43 supported in a guide 76, periodically advancing the electrode 43 through the guide 76 to successive positions substantially in contact with the workpiece 44 to cause the workpiece 44 to be spark eroded by electrical discharge of a capacitor 51 connected in parallel with the machining gap between the electrode 43 and workpiece 44, and electrochemically machining the workpiece 44 during recharging of the capacitor 51 whilst the electrode 43 is being advanced towards the workpiece 44. In operation, the electrode 43 is advanced by a stepping motor 46 towards the workpiece 44 through a guide tube 76 surrounded by a collar 68 to which electrolyte is supplied whereby the electrolyte flows down the electrode 43. During the advance of the electrode 43, which may be vibrated, the workpiece 44 is electrochemically machined using a D.C. current supplied via a resistor 52 until the electrode 43 is about to touch the workpiece 44 whereupon a capacitor 51 discharges to machine the workpiece 44 by spark erosion. Upon detection of the discharge of the capacitor 51, the electrode 43 is withdrawn by the motor 46 and then advanced again towards the workpiece 44 whereupon the cycle is repeated. The breakthrough of the electrode 43 through the workpiece 44 is detected by monitoring the peak potential between the electrode 43 and workpiece 44 or the frequency of spark discharges whereupon the speed of the motor 46 is slowed and the machining operation terminated after a predetermined time. A plurality of passages can be machined simultaneously. The shape of the passage produced can be varied by adjusting the proportion of electrical discharge to electrochemical machining by changing the size of the resistor 52. A succession of passages may be produced by automatically controlling the apparatus (Fig. 9, not shown). The electrolyte used comprises tap water, sodium sulphate in deionized water or potassium chloride and sodium acetate in deionized water.
GB1302974A 1974-03-23 1974-03-23 Methods and apparatus for electrically machining a workpiece Expired GB1505065A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1302974A GB1505065A (en) 1974-03-23 1974-03-23 Methods and apparatus for electrically machining a workpiece
DE19752512331 DE2512331A1 (en) 1974-03-23 1975-03-20 ELECTROEROSION PROCESS FOR THE PROCESSING OF WORK PIECES AND DEVICE FOR PERFORMING THIS PROCESS
FR7508977A FR2264625B1 (en) 1974-03-23 1975-03-21
IT2161575A IT1037143B (en) 1974-03-23 1975-03-24 DEVICE AND METHOD FOR ELECTRICALLY WORKING A PART
CH374775A CH603301A5 (en) 1974-03-23 1975-03-24
JP3526175A JPS50157998A (en) 1974-03-23 1975-03-24
US05/806,063 US4159407A (en) 1974-03-23 1977-06-13 Methods and apparatus for electrically machining a work piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1302974A GB1505065A (en) 1974-03-23 1974-03-23 Methods and apparatus for electrically machining a workpiece

Publications (1)

Publication Number Publication Date
GB1505065A true GB1505065A (en) 1978-03-22

Family

ID=10015513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302974A Expired GB1505065A (en) 1974-03-23 1974-03-23 Methods and apparatus for electrically machining a workpiece

Country Status (6)

Country Link
JP (1) JPS50157998A (en)
CH (1) CH603301A5 (en)
DE (1) DE2512331A1 (en)
FR (1) FR2264625B1 (en)
GB (1) GB1505065A (en)
IT (1) IT1037143B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5615933A (en) * 1979-07-13 1981-02-16 Mitsubishi Electric Corp Electrospark machining device
US4487671A (en) * 1981-04-15 1984-12-11 National Research Development Corporation Methods and apparatus for the electrical machining of a workpiece
GB2162454A (en) * 1984-08-01 1986-02-05 Dowty Rotol Ltd Method of manufacturing internally-toothed bevel gear and apparatus therefor
GB2174106A (en) * 1985-04-10 1986-10-29 Carbide Impregnation Limited Electrode positioning apparatus
WO1989007028A1 (en) * 1988-01-27 1989-08-10 Institut Elektroniki Imeni U.A.Arifova Akademii Na Device for electro-erosive perforation of parts
GB2241203A (en) * 1989-12-14 1991-08-28 Nat Res Dev Machining workpieces

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1583442A (en) * 1976-04-15 1981-01-28 Rolls Royce Method of and apparatus for controlling an electro-discharge drilling machine tool
DE2901712A1 (en) * 1978-01-17 1979-08-02 Inoue Japax Res LIQUID JET SYSTEM FOR THE ELECTRICAL MACHINING OF WORKPIECES
JP5301125B2 (en) * 2007-08-03 2013-09-25 ゼネラル・エレクトリック・カンパニイ Combined electromachining method
WO2015122103A1 (en) * 2014-02-17 2015-08-20 国立大学法人東京農工大学 Electrochemical machining apparatus, electrochemical machining method, and tool electrode

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5615933A (en) * 1979-07-13 1981-02-16 Mitsubishi Electric Corp Electrospark machining device
US4487671A (en) * 1981-04-15 1984-12-11 National Research Development Corporation Methods and apparatus for the electrical machining of a workpiece
GB2162454A (en) * 1984-08-01 1986-02-05 Dowty Rotol Ltd Method of manufacturing internally-toothed bevel gear and apparatus therefor
GB2174106A (en) * 1985-04-10 1986-10-29 Carbide Impregnation Limited Electrode positioning apparatus
WO1989007028A1 (en) * 1988-01-27 1989-08-10 Institut Elektroniki Imeni U.A.Arifova Akademii Na Device for electro-erosive perforation of parts
US5019683A (en) * 1988-01-27 1991-05-28 Abdukarimov Erkin T Electroerosive drilling of holes with working fluid system
GB2241203A (en) * 1989-12-14 1991-08-28 Nat Res Dev Machining workpieces
GB2241203B (en) * 1989-12-14 1994-08-03 Nat Res Dev Methods of preparation of surfaces and applications therefor

Also Published As

Publication number Publication date
DE2512331A1 (en) 1975-09-25
FR2264625A1 (en) 1975-10-17
IT1037143B (en) 1979-11-10
FR2264625B1 (en) 1981-03-20
CH603301A5 (en) 1978-08-15
JPS50157998A (en) 1975-12-20

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Legal Events

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