GB791014A - Improvements in or relating to spark machining - Google Patents

Improvements in or relating to spark machining

Info

Publication number
GB791014A
GB791014A GB2581255A GB2581255A GB791014A GB 791014 A GB791014 A GB 791014A GB 2581255 A GB2581255 A GB 2581255A GB 2581255 A GB2581255 A GB 2581255A GB 791014 A GB791014 A GB 791014A
Authority
GB
United Kingdom
Prior art keywords
section
cross
sept
electrode
increase
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
GB2581255A
Inventor
Robert Stanley Bennett
Eric Hewstone Carman
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.)
Birmingham Small Arms Co Ltd
Original Assignee
Birmingham Small Arms Co Ltd
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 Birmingham Small Arms Co Ltd filed Critical Birmingham Small Arms Co Ltd
Priority to GB2581255A priority Critical patent/GB791014A/en
Publication of GB791014A publication Critical patent/GB791014A/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

Abstract

791,014. Cutting by spark discharge. BIRMINGHAM SMALL ARMS CO., Ltd. Sept. 4, 1956 [Sept. 9, 1955; March 2, 1956], Nos. 25812/55 and 6546/56. Class 83 (4). A method of forming by spark machining a deep hole, comprises using an electrode having a cross-section smaller than is ordinarily used for a hole of the cross-section required, and periodically encouraging side sparking to increase the section to that required. Side sparking may be encouraged by interrupting the lengthwise feed of the electrode and/or increasing the operating voltage by 10-20 per cent. The operating voltage is preferably rectified A.C. The invention is preferably used for forming holes of 0.02-0.03 inch diameter and each feeding stage is limited to 1 or 1¢ inches in length before the cross-section is increased by side sparking. The interruption of feed and/or the increase of voltage may be effected automatically at the required intervals. Reference is made to machining heat and corrosionresistant alloys used for gas turbine blades.
GB2581255A 1955-09-09 1955-09-09 Improvements in or relating to spark machining Expired GB791014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2581255A GB791014A (en) 1955-09-09 1955-09-09 Improvements in or relating to spark machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2581255A GB791014A (en) 1955-09-09 1955-09-09 Improvements in or relating to spark machining

Publications (1)

Publication Number Publication Date
GB791014A true GB791014A (en) 1958-02-19

Family

ID=10233708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2581255A Expired GB791014A (en) 1955-09-09 1955-09-09 Improvements in or relating to spark machining

Country Status (1)

Country Link
GB (1) GB791014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439660A (en) * 1981-02-03 1984-03-27 Inoue-Japax Research Incorporated Electroerosive contour-machining method and apparatus with a rotary tool electrode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439660A (en) * 1981-02-03 1984-03-27 Inoue-Japax Research Incorporated Electroerosive contour-machining method and apparatus with a rotary tool electrode

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