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Title:
COINING METHOD
Document Type and Number:
Japanese Patent JP2688016
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To apply continuous coining to a material to be worked by a comparatively small rolling force by forming a roll on the side of the material to be worked into an appropriate diameter, to prevent the damages of a roll on a die side and the die, especially the damage of the roll on the die side, and to remarkably improve the durability of a coining device.
SOLUTION: In this method for coining a material 3 to be worked by the projecting and the recessed part on a die surface 1a by passing a die 1 having projecting and recessed parts on the die surface 1a and the material 3 are passed superimposedly through the gap between a pair of rolls 2 and 4, and applying a rolling force by the roll 2 to the die 1 and the material 3 while revolving a pair of the rolls 2 and 4 to impart a plastic deformation to the material 3, a thin flexible sheet material 9 is disposed between the roll 4 on the die 1 side and the die 1.


Inventors:
Matsuzaki, Toshihiko
Noya, Kazuo
Nakao, Kiyotaka
Application Number:
JP1995000346155
Publication Date:
August 22, 1997
Filing Date:
December 12, 1995
Export Citation:
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Assignee:
TECH RES & DEV INST OF JAPAN DEF AGENCY
International Classes:
B21D22/02; B21D22/10; B21D31/00; (IPC1-7): B21D31/00; B21D22/02; B21D22/10
Domestic Patent References: