GB1225256A - - Google Patents

Info

Publication number
GB1225256A
GB1225256A GB1335668A GB1335668A GB1225256A GB 1225256 A GB1225256 A GB 1225256A GB 1335668 A GB1335668 A GB 1335668A GB 1335668 A GB1335668 A GB 1335668A GB 1225256 A GB1225256 A GB 1225256A
Authority
GB
United Kingdom
Prior art keywords
current
rectifier
inductance
variable
erosion
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
GB1335668A
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 filed Critical
Publication of GB1225256A publication Critical patent/GB1225256A/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
    • 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
    • B23H2300/00—Power source circuits or energization
    • B23H2300/20—Relaxation circuit power supplies for supplying the machining current, e.g. capacitor or inductance energy storage circuits

Landscapes

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

Abstract

1,225,256. Electro-erosion apparatus. CINCINNATI MILLING MACHINE CO. 19 March, 1968 [30 March, 1967], No. 13356/68. Heading B3V. [Also in Division H5] An electro-erosion apparatus has its erosion current controlled to reduce electrode wear by passing the current through a parallel inductance 5 and resistance 4 in series with the electrode gap 2, 3. The current is switched on by a rectifier 9 controlled by a pulse generator 8. Initially the full voltage of the D.C. source 1 causes a current i 0 to flow whose size is variable and determined by the variable resistance 4. After a short time current flows through the inductance 5 so that the current increases constantly to i 1 . The rate of increase is adjustable by the variable inductance 5. When a rectifier 10 is switched on by the pulse generator the condenser 7 is charged and the current across the gap falls rapidly and the rectifier 9 switches off, the condenser discharges in a time dependent on the inductance 5 and capacitor 7 values and charges a buffer capacitor 6. The cycle is then repeated by switching on the rectifier 9.
GB1335668A 1967-03-30 1968-03-19 Expired GB1225256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6704507A NL6704507A (en) 1967-03-30 1967-03-30

Publications (1)

Publication Number Publication Date
GB1225256A true GB1225256A (en) 1971-03-17

Family

ID=19799696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1335668A Expired GB1225256A (en) 1967-03-30 1968-03-19

Country Status (7)

Country Link
BE (1) BE712518A (en)
CH (1) CH488523A (en)
DE (1) DE1765032C3 (en)
FR (1) FR1569771A (en)
GB (1) GB1225256A (en)
NL (2) NL6704507A (en)
SE (1) SE327769B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441005A (en) * 1980-05-06 1984-04-03 Sodick Co., Ltd. EDM Pulse generator with a variable output inductor for producing pulse with gradually rising edges
JPS63156618A (en) * 1986-12-22 1988-06-29 Hoden Seimitsu Kako Kenkyusho Ltd Electric discharge machine
US4885066A (en) * 1987-09-17 1989-12-05 Shizuoka Seiki Co., Ltd. Electrolytic finishing method
DE9409413U1 (en) * 1994-06-13 1994-09-29 Oblf, Gesellschaft für Elektronik und Feinwerktechnik mbH, 58454 Witten Device for marking metallic samples

Also Published As

Publication number Publication date
DE1765032B2 (en) 1977-08-04
FR1569771A (en) 1969-06-06
NL6704507A (en) 1968-10-01
DE1765032A1 (en) 1971-07-01
DE1765032C3 (en) 1979-09-13
CH488523A (en) 1970-04-15
SE327769B (en) 1970-08-31
NL128958C (en)
BE712518A (en) 1968-07-31

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Legal Events

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