Title:
PROCESS FOR PRODUCING TUBULAR RING WITH BEADS AND DIE FOR USE THEREIN
Document Type and Number:
WIPO Patent Application WO/2004/028720
Kind Code:
A1
Abstract:
A die (6) having a molding plane on the inner surface side and a plurality of grooves for molding beads formed in the molding plane along the circumferential direction is arranged on the outer circumferential side of a tubular material ring (1), of which the inner circumferential side is arranged with a coil body (7) for electromagnetic molding. Under that state, a large instantaneous current is fed to the coil body (7) for electromagnetic molding, the tubular material ring (1) is enlarged in diameter and pressed against the molding plane of the die (6), thus performing electromagnetic forming in a shape corresponding to the molding plane. Them, such improvements are make as an air-venting die (6), a splittable die, correction of a roll after electromagnetic forming, a plurality of times of instantaneous application of a large current, a die with a cutter, use of a tubular material ring having a large number of holes, a die with a positioning means, and the like. Consequently, a highly accurate tubular ring with beads can be produced at a low cost with high productivity.
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Inventors:
IMAMURA YOSHIHAYA (JP)
EGUCHI NORITAKE (JP)
SAKURAI TAKEO (JP)
TANIMOTO HIROSHI (JP)
EGUCHI NORITAKE (JP)
SAKURAI TAKEO (JP)
TANIMOTO HIROSHI (JP)
Application Number:
PCT/JP2003/012372
Publication Date:
April 08, 2004
Filing Date:
September 26, 2003
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
IMAMURA YOSHIHAYA (JP)
EGUCHI NORITAKE (JP)
SAKURAI TAKEO (JP)
TANIMOTO HIROSHI (JP)
IMAMURA YOSHIHAYA (JP)
EGUCHI NORITAKE (JP)
SAKURAI TAKEO (JP)
TANIMOTO HIROSHI (JP)
International Classes:
B60C17/04; B21D26/14; B21D39/08; B21D53/16; B21D53/30; B60C17/06; (IPC1-7): B21D26/14; B21D39/08; B21D53/26
Domestic Patent References:
| WO1997045216A1 | 1997-12-04 |
Foreign References:
| DE3215029A1 | 1982-12-09 | |||
| JPH0824969A | 1996-01-30 | |||
| JPH0810864A | 1996-01-16 | |||
| FR2488163A1 | 1982-02-12 | |||
| JPH04197524A | 1992-07-17 | |||
| JPS5964125A | 1984-04-12 | |||
| JPS4520599Y1 | 1970-08-18 | |||
| JP2001310602A | 2001-11-06 |
Other References:
See also references of EP 1563924A4
Attorney, Agent or Firm:
Kaji, Yoshiyuki (Nishinakajima Yodogawa-k, Osaka-shi Osaka, JP)
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