US4052274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical wire cutting method
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1976-03-22
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Granted: 1977-10-04
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Expires: 1996-03-22
Abstract
Abstract In a method for electrochemical machining effected by disposing a work blank and a cathode opposite each other across a gap in an electrolyte and causing a flow of electric current to pass between said work blank and cathode, an improvement is disclosed which consists in using, as the cathode, a thin wire having a non-linear shape and, as the electric current, a pulsed electric current and thereby machining the work blank to a desired shape.
Inventors
- 👤 Kunio Chikamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
In a method of electrochemical machining in which a work blank member and a cathode member are disposed opposite each other in an electrolyte, a pulsed electric current having a pulse width of 0.01 to 10 ms and a duty factor of not more than 0.5 is passed between said members while one of said members is moved relative to the other member, the cathode member being a thin wire having two end portions mounted on a support and a central portion intermediate said end portions, the improvement which comprises said central portion being laterally offset from a straight line connecting said end portions.
Claim 2
Dependent Claim
104 words
In a method of electrochemical machining in which a work blank member and a cathode member are disposed opposite each other in an electrolyte, a pulsed electric current having a pulse width of 0.01 to 10 ms and a duty factor of not more than 0.5 is passed between said members while one of said members is moved relative to the other member, the cathode member being a thin wire having two end portions mounted on a support and a central portion intermediate said end portions, the improvement which comprises said central portion being laterally offset from a straight line connecting said end portions.
Claim 3
Dependent Claim
39 words
The method according to claim 1, wherein said one member is moved relative to the other member in a predetermined direction, said central portion being laterally offset from said straight line in a plane transverse to said predetermined direction.
Claim 4
Dependent Claim
14 words
The method according to claim 2, wherein said thin wire essentially consists of copper.
Claim 5
Dependent Claim
13 words
The method according to claim 3, wherein said central portion of semicircular shape.
Claim 6
Dependent Claim
12 words
The method according to claim 3, wherein said central portion of V-shape.
Claim 7
Dependent Claim
13 words
The method according to claim 2, said plane being perpendicular to said direction.
Claim 8
Dependent Claim
22 words
The method according to claim 1, wherein the spacing of said end portions is smaller than the length of said central portion.
References Cited (Backward Citations)
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US3294666A
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US3297555A
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US3417006A
Cited
US3477929A
Cited
US3607689A
Cited
US3649488A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |