EP0059639A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method for wire-cut electric discharge machining
Assignee: Fanuc Corp
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Filing: 1982-03-02
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Granted: —
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Expires: 2002-03-02
Abstract
Abstract The invention relates to cutting a work (W) into a closed loop configuration by means of a wire-cut, electric discharge machine provided with an automatic wire feed mechanism. Electric discharge machining is started from a machining start hole (31) made in the work (W) and is performed to a point (C) of suspension of the electric discharge machining operation where a part (32) of the closed loop configuration is left uncut. After fixing at least one portion of the closed loop configuration (33) to the work (W) by adhesive (34) and reinserting the wire electrode into the machining start hole (31) by the automatic wire feed mechanism, the electric discharge machining operation is resumed to cut off the part (B-C) remaining uncut. In the case of the wire electrode being broken during the electric discharge machining operation, the wire electrode is reinserted by the automatic wire feed mechanism into the machining start hole (31) and is moved to the position of its breakage along the route where the machining operation has already been performed and then the electric discharge machining operation is resumed.
Inventors
- 👤 Yoshiyuki Nomura
- 👤 Kanemasa Okuda
- 👤 Hisao Ishii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:11
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02; B23H7/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
184 words
A wire-cut, electric discharge machining method for cutting from a work a cut-away portion defined by a closed loop machining path by means of a wire-cut, electric discharge machine provided with an automatic wire feed mechanism for automatically installing a wire electrode on a wire electrode running system, the method comprising the steps of: starting electric discharge machining of the closed loop from a machining start hole made in the work; performing electric discharge machining along the closed loop path to a point of suspension of the electric discharge machining operation where a part of the closed loop configuration is left uncut; securing the work portion to be cut-away, formed within the unfinished closed loop, to the remainder of the work; reinserting the wire electrode into the machining start hole by means of the automatic wire feed mechanism; and performing electric discharge machining from the machining start hole along the closed loop path in the opposite direction to said point of suspension of the electric discharge machining operation, thereby to cut off the part left uncut and to complete the closed loop machining path.
Claim 2
Dependent Claim
184 words
A wire-cut, electric discharge machining method for cutting from a work a cut-away portion defined by a closed loop machining path by means of a wire-cut, electric discharge machine provided with an automatic wire feed mechanism for automatically installing a wire electrode on a wire electrode running system, the method comprising the steps of: starting electric discharge machining of the closed loop from a machining start hole made in the work; performing electric discharge machining along the closed loop path to a point of suspension of the electric discharge machining operation where a part of the closed loop configuration is left uncut; securing the work portion to be cut-away, formed within the unfinished closed loop, to the remainder of the work; reinserting the wire electrode into the machining start hole by means of the automatic wire feed mechanism; and performing electric discharge machining from the machining start hole along the closed loop path in the opposite direction to said point of suspension of the electric discharge machining operation, thereby to cut off the part left uncut and to complete the closed loop machining path.
Claim 3
Dependent Claim
88 words
A method according to claim 1 wherein, in the case of the wire electrode being broken during the electric discharge machining operation of a closed loop, the wire electrode is subsequently re inserted by the automatic wire feed mechanism into the machining start hole of the closed loop and is moved to the position of its breakage along the route and in the direction in which the electric discharge machining operation was being carried out immediately prior to the breakage, and then the electric discharge operation is resumed.
Claim 4
Dependent Claim
104 words
A method according to claim 1 or 2, when adapted for cutting from a work a plurality of cut-away portions defined by respective closed loop machining paths, wherein in one machining stage the closed loop paths are machined one after another to said points of suspension of said electric discharge machining operations where a part of each closed loop configuration is left uncut; the work portions to be cut away, formed within the unfinished closed loops, are secured to the remainder of the work; and in a subsequent machining stage the closed loop machining paths are completed one after another in the aforesaid manner.
Claim 5
Dependent Claim
183 words
A wire-cut, electric discharge machine provided with an automatic wire feed mechanism for automatically installing a wire electrode on a wire electrode running system the machine being adapted and arranged to perform a machining method for cutting from a work a cut-away portion defined by a closed loop machining path, the method comprising the steps of; starting electric discharge machining of the closed loop from a machining start hole made.in the work; performing electric discharge machining along the closed loop path to a point of suspension of the electric discharge machining operation where a part of the closed loop configuration is left uncut; securing the portion to be cut-away, formed within the unfinished closed loop, to the remainder of the work; reinserting the wire electrode into the machining start hole by means of the automatic wire feed mechanism; and performing electric discharge machining from the machining start hole along the closed loop path in the opposite direction to said point of suspension of the electric discharge machining operationthereby to cut off the part left uncut and to complete the closed loop machining path.
Claim 6
Dependent Claim
183 words
A wire-cut, electric discharge machine provided with an automatic wire feed mechanism for automatically installing a wire electrode on a wire electrode running system the machine being adapted and arranged to perform a machining method for cutting from a work a cut-away portion defined by a closed loop machining path, the method comprising the steps of; starting electric discharge machining of the closed loop from a machining start hole made.in the work; performing electric discharge machining along the closed loop path to a point of suspension of the electric discharge machining operation where a part of the closed loop configuration is left uncut; securing the portion to be cut-away, formed within the unfinished closed loop, to the remainder of the work; reinserting the wire electrode into the machining start hole by means of the automatic wire feed mechanism; and performing electric discharge machining from the machining start hole along the closed loop path in the opposite direction to said point of suspension of the electric discharge machining operationthereby to cut off the part left uncut and to complete the closed loop machining path.
Claim 7
Dependent Claim
96 words
A machine according to claim 4, which is adapted and arranged to perform said machining method wherein, in the case of the wire electrode being broken during the electric discharge machining operation of a closed loop, the wire electrode is subsequently reinserted by the automatic wire feed mechanism into the machining start hole of the closed loop and is moved to the position of in its breakage along the route and in the direction/which the electric discharge machining operation was being carried out immediately prior to the breakage, and then the electric discharge operation is resumed.
Claim 8
Dependent Claim
115 words
A machine according to claim 4 or 5, which is adapted and arranged to perform said machining method when the method is adapted for cutting from a work a plurality of cut-away portions defined by respective closed loop machining paths, wherein in one machining stage the closed loop paths are machined:one after another to said points of suspension of said electric discharge machining operations where a part of each closed loop configuration is left uncut; the work portions to be cut away, formed within the unfinished closed loops, are secured to the remainder of the work; and in asubsequent machining stage the closed loop machining paths are completed one after another in the aforesaid manner.
References Cited (Backward Citations)
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