US3558842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electroerosive machining of current-conducting materials and a device for effecting same
Assignee: Individual
•
Filing: 1967-03-06
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Granted: 1971-01-26
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Expires: 1987-03-06
Abstract
Abstract The electroerosive machining of current conducting materials which is effected by a series of impulses each having an amplitude-fluctuating intricate form which breaks through the erosion gap, evaporates, melts down and throws off metal from the molten pool, partially evacuates the products of erosion from the working gap and forms a protective film from the products of the working liquid cracking on the tool electrode. There may be employed an additional impulse having a current and a voltage amplitude two to 10 times greater for finally removing the erosion products.
Inventors
- 👤 Abram Lazarevich Livshits
- 👤 Mark Shmulevich Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A device for effecting the electroerosive machining of current-conducting materials, comprising a presettable generator, defined by at least three small-power generators of rectangular impulses of voltage and current of variOus duration and phase; an ignition generator connected in parallel to the erosion gap and to one of said small-power generators of rectangular impulses for the starting thereof; a power generator connected in parallel to the erosion gap and comprising at least two switchover stages connected in parallel and at least one of which is connected to said small-power generators of rectangular impulses.
Claim 2
Independent Claim
92 words
A device for effecting the electroerosive machining of current-conducting materials, comprising a presettable generator, defined by at least three small-power generators of rectangular impulses of voltage and current of variOus duration and phase; an ignition generator connected in parallel to the erosion gap and to one of said small-power generators of rectangular impulses for the starting thereof; a power generator connected in parallel to the erosion gap and comprising at least two switchover stages connected in parallel and at least one of which is connected to said small-power generators of rectangular impulses.
Claim 3
Dependent Claim
25 words
The device according to claim 1, wherein a switch connects said switchover stages to said small-power generators of rectangular impulses having various duration and phase.
Claim 4
Dependent Claim
39 words
The device according to claim 2, wherein at least three single-phase inactive multivibrators, which for starting purposes, are connected via a switch either in parallel to a further generator or in series one after another, constitute said small-power generators.
Claim 5
Dependent Claim
25 words
The device according to claim 3, wherein a circuit is connected between said small-power generators of rectangular impulses and the input of said switchover stage.
Claim 6
Independent Claim
93 words
A method of electroerosive machining of current-conducting materials comprising supplying an electrode tool and an electrode workpiece with a series of impulses each having a voltage peak in the forefront and current in the form of a continuous chain of alternating parts having different current amplitudes in which the parts having a larger amplitude are equal to one another and the parts having a smaller amplitude are equal to one another in magnitude or current amplitude, and upon terminating the impulse or during interpulse intervals the current and the voltage values equal zero.
Claim 7
Independent Claim
93 words
A method of electroerosive machining of current-conducting materials comprising supplying an electrode tool and an electrode workpiece with a series of impulses each having a voltage peak in the forefront and current in the form of a continuous chain of alternating parts having different current amplitudes in which the parts having a larger amplitude are equal to one another and the parts having a smaller amplitude are equal to one another in magnitude or current amplitude, and upon terminating the impulse or during interpulse intervals the current and the voltage values equal zero.
Claim 8
Dependent Claim
37 words
The method of electroerosive machining of current-conducting materials as claimed in claim 5 further comprising supplying an additional impulse having a current and a voltage amplitude 2 to 10 times greater for finally removing the erosion products.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |