GB860118A - Method and arrangement for detaching material by spark erosion - Google Patents

Method and arrangement for detaching material by spark erosion

Info

Publication number
GB860118A
GB860118A GB9022/57A GB902257A GB860118A GB 860118 A GB860118 A GB 860118A GB 9022/57 A GB9022/57 A GB 9022/57A GB 902257 A GB902257 A GB 902257A GB 860118 A GB860118 A GB 860118A
Authority
GB
United Kingdom
Prior art keywords
electrode
polarity
spark
forming
gap
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
GB9022/57A
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.)
Agie Charmilles SA
Original Assignee
Agie Charmilles SA
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 Agie Charmilles SA filed Critical Agie Charmilles SA
Publication of GB860118A publication Critical patent/GB860118A/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
    • B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
    • B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train

Landscapes

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

Abstract

860,118. Cutting by spark erosion. AGIE AKTIENGESELLSCHAFT FUR INDUSTRIELLE ELEKTRONIK. March 19, 1957 [March 19, 1956], No. 9022/57. Class 83 (4). In the removal of metal by spark erosion using an alternating current supply at least a part of the wave portions of one polarity are suppressed, the amount of suppression being increased in dependence upon the position of the electrode to thereby continuously widen the spark gap and thus compensate for burning-off of the electrode. The spark emission apparatus has switch means 5 for reversing the polarity of the spark gap 2 and current is supplied to the gap, which may be in a liquid dielectric, from a generator having variable voltage and frequency through a change-over switch 3. The polarity reversing switch 5 is bridged by a variable resistance 6 and half-wave rectifier 4 which suppresses at least part of one polarity. The rectifier may be a dry-plate type or a presaturated impedance coil may be used. The resistance 6 varies the amount of suppression and may be adjusted automatically with the advance of the electrode into the workpiece. An electrode 7, Fig. 2, may be used to bore a stepped hole in a blank 8 by using a positivelyconnected electrode for forming the smaller portion and a negatively-connected electrode for forming the larger portion. Another embodiment is described for forming a bore with opposed ribs, Figs. 3a, 3b (not shown). Reference has been directed by the Comptroller to Specification 773,782.
GB9022/57A 1956-03-19 1957-03-19 Method and arrangement for detaching material by spark erosion Expired GB860118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH860118X 1956-03-19

Publications (1)

Publication Number Publication Date
GB860118A true GB860118A (en) 1961-02-01

Family

ID=4543050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9022/57A Expired GB860118A (en) 1956-03-19 1957-03-19 Method and arrangement for detaching material by spark erosion

Country Status (5)

Country Link
US (1) US2951142A (en)
CH (1) CH337282A (en)
DE (1) DE1008428B (en)
FR (1) FR1169785A (en)
GB (1) GB860118A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1109801B (en) * 1957-12-12 1961-06-29 Siemens Ag Process for the production of work-related metal surfaces of workpieces by means of electrical discharge machining
NL132982C (en) * 1958-11-10
NL258818A (en) * 1959-12-08
US3098149A (en) * 1960-06-06 1963-07-16 Inoue Kiyoshi Spark discharge maching apparatus for hard metals
US3213257A (en) * 1960-07-19 1965-10-19 Gen Motors Corp Electrical stock removal apparatus
US3158728A (en) * 1960-07-26 1964-11-24 Elox Corp Michigan High voltage-reverse polarity edm
FR1274953A (en) * 1960-08-26 1961-11-03 Soudure Elec Languepin Method and device for electro-erosion machining
US3109120A (en) * 1960-10-20 1963-10-29 Gen Motors Corp Electrical stock removal apparatus
US3062985A (en) * 1960-11-08 1962-11-06 Elox Corp Michigan Impedance matching circuit for spark machining
US3624338A (en) * 1970-08-06 1971-11-30 Ibm Electrical discharge machining pulse-polarity-reversing control
US3732392A (en) * 1971-03-10 1973-05-08 Elox Inc Polarity reversal system for electrical discharge machining apparatus
US3777102A (en) * 1972-07-19 1973-12-04 Colt Ind Operating Corp Electrical discharge machining power supply circuit
US4350863A (en) * 1978-03-07 1982-09-21 Inoue-Japax Research Incorporated High-frequency power feeder circuitry and supply for electrical discharge machining
JPS54119195A (en) * 1978-03-07 1979-09-14 Inoue Japax Res Inc Electric discharge processing device
US5399825A (en) * 1991-03-01 1995-03-21 Creare, Inc. Inductor-charged electric discharge machining power supply
JP3331077B2 (en) * 1994-12-21 2002-10-07 株式会社ソディック Power supply unit for electric discharge finishing
JP5323283B1 (en) * 2012-10-30 2013-10-23 三菱電機株式会社 EDM machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2273819A (en) * 1940-01-01 1942-02-24 Kapella Ltd Apparatus for electrically etching metallic articles

Also Published As

Publication number Publication date
US2951142A (en) 1960-08-30
FR1169785A (en) 1959-01-06
CH337282A (en) 1959-03-31
DE1008428B (en) 1957-05-16

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