US4233486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling-wire electrical discharge machine
Assignee: Japan Kinoko Research Center Foundation
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Filing: 1978-12-21
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Granted: 1980-11-11
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Expires: 1998-12-21
Abstract
Abstract A traveling-wire electrical machining system with improved accuracy results by providing, in addition to the usual electrode guide arms straddling the workpiece and by which the electrode is sharply deflected in its path from the supply coil to the backup coil, a second pair of arms guiding the stretch of the electrode immediately forming the machining region. According to the invention, the second pair of arms, also straddling the workpiece, engages the electrode between each deflection location and the workpiece. The second pair of arms is mounted on the column independently of the first pair of arms so that the second arms are not affected by deflection of the first arms.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02; B23H7/08; B23H7/10; B23H7/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
201 words
A traveling-wire electrical discharge machine for electroerosively machining a workpiece located in a machining region with a condinuous elongate electrode, said machine comprising: a single column mounted on a machine base; supply reel means mounted on said column for feeding said continuous elongate electrode; takeup reel means mounted on said column for collecting said continuous elongate electrode; a pair of first arms individually mounted to said column and supporting at their respective end portions a pair of first guide sections for spanning said continuous elongate electrode therebetween across said machining region and for guiding said continuous electrode from said supply reel means toward said machining region and for guiding said spanned electrode toward said takeup reel, respectively; means for advancing said continuous electrode and transporting it through said machining region; a pair of second arms mounted individually to said column and supported independently of said first arms by said single column between said first arms and supporting at their respective end portions a pair of second wire guide sections spacedly positioned between said first wire guide sections across said machining region for guiding said spanned electrode precisely in line with a cutting section across a machining gap in said machining region.
Claim 2
Dependent Claim
201 words
A traveling-wire electrical discharge machine for electroerosively machining a workpiece located in a machining region with a condinuous elongate electrode, said machine comprising: a single column mounted on a machine base; supply reel means mounted on said column for feeding said continuous elongate electrode; takeup reel means mounted on said column for collecting said continuous elongate electrode; a pair of first arms individually mounted to said column and supporting at their respective end portions a pair of first guide sections for spanning said continuous elongate electrode therebetween across said machining region and for guiding said continuous electrode from said supply reel means toward said machining region and for guiding said spanned electrode toward said takeup reel, respectively; means for advancing said continuous electrode and transporting it through said machining region; a pair of second arms mounted individually to said column and supported independently of said first arms by said single column between said first arms and supporting at their respective end portions a pair of second wire guide sections spacedly positioned between said first wire guide sections across said machining region for guiding said spanned electrode precisely in line with a cutting section across a machining gap in said machining region.
Claim 3
Dependent Claim
37 words
The traveling-wire electrical discharge machine defined in claim 1 wherein said first guide sections are positioned to guide said continuous elongate electrode so that its direction of advance changes sharply at each of said first guide sections.
Claim 4
Dependent Claim
39 words
The traveling-wire electrical discharge machine defined in claim 2 wherein said first guide sections are positioned to stretch and guide said spanned electrode therebetween generally in alignment with said cutting section across said maching gap in said machining region.
Claim 5
Dependent Claim
50 words
The traveling-wire electrical discharge machine as defined in claim 1, claim 2 or claim 3, further comprising a wire-joining device arranged in a path between said supply reel and said take-up reel for uniting a wire-piece leading from said supply reel and a wire-piece leading to said take-up reel together.
Claim 6
Dependent Claim
104 words
The traveling-wire electrical discharge machine defined in claim 4 wherein said wire-joining device comprises a wire-twisting member having a central opening for receiving the open end of one of said wire pieces therethrough and a wire-holding section for holding the open end of the other wire piece, said wire-twisting member being rotatably mounted; a wire-clipping member for holding the end of said one wire piece passing through said opening and the open end of the said other wire piece together; and a rotary drive member for rotating said twisting member relative to said clipping member to wind one of said pieces around the other.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |