GB1185831A - Spark Erosion Tools - Google Patents

Spark Erosion Tools

Info

Publication number
GB1185831A
GB1185831A GB49066A GB49066A GB1185831A GB 1185831 A GB1185831 A GB 1185831A GB 49066 A GB49066 A GB 49066A GB 49066 A GB49066 A GB 49066A GB 1185831 A GB1185831 A GB 1185831A
Authority
GB
United Kingdom
Prior art keywords
mandrel
deposit
tool
spark erosion
copper
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
GB49066A
Inventor
Wilfred James Albert Powell
Geoffrey Wilfred Fynn
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.)
MINI OF TECHNOLOGY
Minister of Technology
Original Assignee
MINI OF TECHNOLOGY
Minister of Technology
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 MINI OF TECHNOLOGY, Minister of Technology filed Critical MINI OF TECHNOLOGY
Priority to GB49066A priority Critical patent/GB1185831A/en
Publication of GB1185831A publication Critical patent/GB1185831A/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
    • B23H1/04—Electrodes specially adapted therefor or their manufacture

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

1,185,831. Spark erosion; making electrodes. MINISTER OF TECHNOLOGY. 5 April, 1967 [5 Jan., 1966], No. 490/66. Headings B3A and B3V. In a spark erosion process the electrode tool has a working surface formed by electrode position of a metallic skin upon a metal mandrel. The tool F may be of stainless steel and after degreasing and cleaning, is provided with a deposit of copper by rotating it within a bath 9 of electrolyte consisting of CuSO 4 and H 2 SO 4 . The bath contains main anode 13, subsidiary anode 15 and a shield 17 of polymethyl methacrylate. During use in a spark erosion process, the copper deposit (21) itself is eroded, Fig. 3 (not shown). This deposit may be removed with nitric acid and replaced by a new deposit. The tool F has holes (7) Fig. 4 (not shown), for the working fluid and a tube (5) through which the eroded debris may be removed by suction. In another embodiment, Fig. 8, the tool comprises a mandrel 43 provided with an internal deposited layer 51 of copper. In use the layer is moved forwardly of the mandrel, after heating in water, by means of a threaded nut 57 to provide an annular trepanning surface. In another embodiment, Figs. 5, 6 (not shown), the deposited layer is provided on the outer surface of the mandrel.
GB49066A 1966-01-05 1966-01-05 Spark Erosion Tools Expired GB1185831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB49066A GB1185831A (en) 1966-01-05 1966-01-05 Spark Erosion Tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB49066A GB1185831A (en) 1966-01-05 1966-01-05 Spark Erosion Tools

Publications (1)

Publication Number Publication Date
GB1185831A true GB1185831A (en) 1970-03-25

Family

ID=9705255

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49066A Expired GB1185831A (en) 1966-01-05 1966-01-05 Spark Erosion Tools

Country Status (1)

Country Link
GB (1) GB1185831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344651A1 (en) * 1976-03-18 1977-10-14 Supla Ets METHOD OF MANUFACTURING A SHELL FOR SHELL FOR AN ELECTRO-EROSION DEVICE
DE2906245A1 (en) * 1978-03-03 1979-09-13 Charmilles Sa Ateliers ELECTRODE FOR ELECTROERMING AND METHOD FOR MANUFACTURING AN ELECTRODE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344651A1 (en) * 1976-03-18 1977-10-14 Supla Ets METHOD OF MANUFACTURING A SHELL FOR SHELL FOR AN ELECTRO-EROSION DEVICE
DE2906245A1 (en) * 1978-03-03 1979-09-13 Charmilles Sa Ateliers ELECTRODE FOR ELECTROERMING AND METHOD FOR MANUFACTURING AN ELECTRODE

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees