FR2245445A2 - Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit - Google Patents

Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit

Info

Publication number
FR2245445A2
FR2245445A2 FR7413170A FR7413170A FR2245445A2 FR 2245445 A2 FR2245445 A2 FR 2245445A2 FR 7413170 A FR7413170 A FR 7413170A FR 7413170 A FR7413170 A FR 7413170A FR 2245445 A2 FR2245445 A2 FR 2245445A2
Authority
FR
France
Prior art keywords
period
limited
polishing process
discharge circuit
type metal
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.)
Granted
Application number
FR7413170A
Other languages
French (fr)
Other versions
FR2245445B2 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2245445A2 publication Critical patent/FR2245445A2/en
Application granted granted Critical
Publication of FR2245445B2 publication Critical patent/FR2245445B2/fr
Granted 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
    • 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
    • B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits

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

Metal removal rate is increased by raising the energy level and increasing the time delay between impulses, using mains supply frequency. The workpiece (2) is submerged in an aqueous electrolyte (3) which is slightly conductive and which is pumped (5) through a gap (6, 7) between the workpiece and electrode (1). Conduction across the gap (7) is through a mains transformer (8), a thyristor (9) and a rectifier bridge (10) which rectifies a small part of the transformer secondary current. The electrode is negative polarity. Rectified impulses are passed through a diode (11) to the thyristor trigger via a circuit (13) which limits its period of excitation.
FR7413170A 1973-08-13 1974-04-16 Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit Granted FR2245445A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2782873A IT992937B (en) 1973-08-13 1973-08-13 PROCESS AND DEVICE FOR PROCESSING BY ELECTRICITY

Publications (2)

Publication Number Publication Date
FR2245445A2 true FR2245445A2 (en) 1975-04-25
FR2245445B2 FR2245445B2 (en) 1979-09-28

Family

ID=11222415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413170A Granted FR2245445A2 (en) 1973-08-13 1974-04-16 Spark type metal polishing process - period of rectified pulses is limited by a discharge circuit

Country Status (2)

Country Link
FR (1) FR2245445A2 (en)
IT (1) IT992937B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344372A1 (en) * 1976-03-15 1977-10-14 Trw Inc Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344372A1 (en) * 1976-03-15 1977-10-14 Trw Inc Electrochemical drilling power supply - utilising a negative DC with superimposed negative pulses connected to the electrolyte

Also Published As

Publication number Publication date
IT992937B (en) 1975-09-30
FR2245445B2 (en) 1979-09-28

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