US5117083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jump control system for an electric discharge machine
Assignee: Fanuc Corp
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Filing: 1991-01-02
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Granted: 1992-05-26
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Expires: 2011-01-02
Abstract
Abstract A jump control system for an electric discharge machine for controlling a jump of the electrical discharge machine. A discharge state is estimated from a discharge voltage (Vn, Vm, Tn) and a discharge current (In) between an electrode (34) and a workpiece (35), and a fuzzy inference is effected by a fuzzy control unit (12) using the estimated discharge state as an input, thereby obtaining an increment (δT) of a jump period and an increment (δD) of a jump distance. A jump period/distance modifying means (23) is used to obtain the jump period (T) and the jump distance (D), and a jump control means (24) executes a jump control based on these values, to thereby effect an electrical discharge machining. Thus, the machining speed can be increased, and the electrical discharge machining state can be improved.
Inventors
- 👤 Hideaki Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:09
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/14; B23H7/18; B23H7/16; B23H7/20; Y; Y10; Y10S; Y10S706/00; Y10S706/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A jump control system for an electric discharge machine having a discharge state, comprising: first control means for performing fuzzy control to set a jump period and a jump distance to optimum values based on the discharge state of the electric discharge machine; and second control means for controlling movement of an electrode relative to a workpiece in response to the jump period and the jump distance.
Claim 2
Dependent Claim
67 words
A jump control system for an electric discharge machine having a discharge state, comprising: first control means for performing fuzzy control to set a jump period and a jump distance to optimum values based on the discharge state of the electric discharge machine; and second control means for controlling movement of an electrode relative to a workpiece in response to the jump period and the jump distance.
Claim 3
Dependent Claim
44 words
A jump control system for an electric discharge machine according to claim 1, wherein said first control means comprises means for performing a plurality of fuzzy rules and membership functions previously stored as a data base and selectable depending on a type of machining.
Claim 4
Dependent Claim
47 words
A jump control system for an electric discharge machine according to claim 1, further comprising detecting means for providing the discharge state including a time-based rate of change by digitizing a waveform of a gap voltage between said electrode of the electric discharge machine and said workpiece.
Claim 5
Dependent Claim
51 words
A jump control system for an electric discharge machine according to claim 2, further comprising detecting means for determining the discharge state based on at least one of a waveform of a gap voltage of the electric discharge machine and a waveform of a discharge current of the electric discharge machine.
Claim 6
Dependent Claim
39 words
A jump control system for an electric discharge machine according to claim 2, further comprising detecting means for determining the discharge state by a fuzzy inference based on at least one of a gap voltage and a discharge current.
Claim 7
Dependent Claim
61 words
A jump control method, comprising the steps of: (a) determining a discharge state of an electric discharge machine; (b) performing fuzzy control based on the discharge state to determine a jump period and a jump distance; and (c) controlling movement of an electrode relative to a workpiece in response to the jump period and the jump distance in said step (b).
Claim 8
Dependent Claim
61 words
A jump control method, comprising the steps of: (a) determining a discharge state of an electric discharge machine; (b) performing fuzzy control based on the discharge state to determine a jump period and a jump distance; and (c) controlling movement of an electrode relative to a workpiece in response to the jump period and the jump distance in said step (b).
Claim 9
Dependent Claim
59 words
A jump control method according to claim 6, wherein said method further comprises the step of (d) selecting a type of machining; and wherein said step (b) comprises the substep of (b1) performing fuzzy control using at least one of a plurality of fuzzy rules and membership functions dependent on the type of machining selected in said step (d).
Claim 10
Dependent Claim
50 words
A jump control method according to claim 7, wherein said step (a) comprises the substep of (a1) determining the discharge state based on at least one of a waveform of a gap voltage of the electric discharge machine and a waveform of a discharge current of the electric discharge machine.
Claim 11
Dependent Claim
49 words
A jump control method according to claim 7, wherein said step (a) comprises the substep of (a1) performing a fuzzy inference based on at least one of a gap voltage of the electric discharge machine and a discharge current of the electric discharge machine to determine the discharge state.
Claim 12
Dependent Claim
49 words
A jump control method according to claim 6, wherein said step (a) comprises the substep of (a1) performing a fuzzy inference based on at least one of a gap voltage of the electric discharge machine and a discharge current of the electric discharge machine to determine the discharge state.
Claim 13
Dependent Claim
51 words
A jump control method according to claim 6, wherein said step (a) comprises the substep of (a1) digitizing the discharge state based on a waveform of a gap voltage between said electrode of the electric discharge machine and said workpiece to include a time-based rate of change of the discharge state.
References Cited (Backward Citations)
US3739136A
Cited
US3909577A
Cited
US4335436A
Cited
US4504722A
Cited
JPS60259321A
Cited
US4700039A
Cited
JPS632613A
Cited
US4952790A
Cited
US4822970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |