GB868684A - Improvements in or relating to drilling by electro-erosion - Google Patents

Improvements in or relating to drilling by electro-erosion

Info

Publication number
GB868684A
GB868684A GB1663858A GB1663858A GB868684A GB 868684 A GB868684 A GB 868684A GB 1663858 A GB1663858 A GB 1663858A GB 1663858 A GB1663858 A GB 1663858A GB 868684 A GB868684 A GB 868684A
Authority
GB
United Kingdom
Prior art keywords
electrode
supplied
electrolyte
blade
workpiece
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
GB1663858A
Inventor
Raymond Thomas Hallsworth
Irvin Holroyd
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 GB1663858A priority Critical patent/GB868684A/en
Publication of GB868684A publication Critical patent/GB868684A/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
    • B23H5/00—Combined machining
    • B23H5/02—Electrical discharge machining combined with electrochemical machining

Landscapes

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

Abstract

868,684. Drilling by electro erosion. ROLLSROYCE Ltd. May 20, 1959 [May 23, 1958], No. 16638/58. Class 83 (4). Holes are drilled in a workpiece 14 by electro erosion using a hollow electrode 13 fed with pulsed direct current and through which is supplied an electrolyte under pressure. The current is supplied by a step-down transformer 24 through a bridge rectifier 26. Electrode 13 consists of a fine copper tube clamped in a holder 12, Fig. 2 (not shown), and through which the electrolyte supplied through pipe 27 is forced under pressure to the spark gap. The electrolyte forms an insulated coating on the bore to prevent side sparking. Workpiece 14 which may be a turbine blade is mounted in a bracket 15 which is lowered automatically by a motor to maintain the required spark gap. A depth indicator scale 20, 21 is provided. An air motor 35 may be used for rotating the blade especially when a helical electrode is used to provide a helical bore which follows the twist of the blade. The electrode may be of elliptical or elongated cross-section.
GB1663858A 1958-05-23 1958-05-23 Improvements in or relating to drilling by electro-erosion Expired GB868684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1663858A GB868684A (en) 1958-05-23 1958-05-23 Improvements in or relating to drilling by electro-erosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1663858A GB868684A (en) 1958-05-23 1958-05-23 Improvements in or relating to drilling by electro-erosion

Publications (1)

Publication Number Publication Date
GB868684A true GB868684A (en) 1961-05-25

Family

ID=10080920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1663858A Expired GB868684A (en) 1958-05-23 1958-05-23 Improvements in or relating to drilling by electro-erosion

Country Status (1)

Country Link
GB (1) GB868684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492297A1 (en) * 1980-10-21 1982-04-23 Japax Inc METHOD AND APPARATUS FOR DRILLING BY ELECTRO-EROSION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492297A1 (en) * 1980-10-21 1982-04-23 Japax Inc METHOD AND APPARATUS FOR DRILLING BY ELECTRO-EROSION

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