Title:
MANUFACTURING METHOD OF ODD-SHAPED COPPER BAR FOR COMMUTATOR PIECE
Document Type and Number:
Japanese Patent JP3661641
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a odd-shaped copper bar for a commutator piece capable of efficiently and inexpensively manufacturing a dissimilar copper bar for a commutator piece.
SOLUTION: A base material 11 is continuously extruded from a copper wire by the friction thrust using a rotary wheel 4. Since the shape of the base material 11 by the conform extrusion is close to a final shape, the number of subsequent cooling steps can be minimized, and the odd-shaped copper bar for the commutator piece is efficiently and inexpensively manufactured.
Inventors:
Tatsuya Sotoki
Kazuhiko Okasa
Satakero Tsukada
Kazuhiko Okasa
Satakero Tsukada
Application Number:
JP2001391869A
Publication Date:
June 15, 2005
Filing Date:
December 25, 2001
Export Citation:
Assignee:
Hitachi Cable Ltd.
International Classes:
B21C23/21; B21C1/00; B21C23/00; B21C23/14; H02K15/02; (IPC1-7): B21C23/21; B21C1/00; B21C23/14; H02K15/02
Domestic Patent References:
| JP11197738A | ||||
| JP2001145307A | ||||
| JP10166097A | ||||
| JP61182819A | ||||
| JP6218425A | ||||
| JP9323104A |
Attorney, Agent or Firm:
Tadao Hirata
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