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Title:
COINING METHOD
Document Type and Number:
Japanese Patent JPH09164434
Kind Code:
A
Abstract:

To subject a thick stock to coining working with a small load using a roll of small diameter by rolling the stock with small rolling width, and transferring the pattern associated with fine rolling deformation of the stock.

In the coining, the stock is rolled with small rolling width in the range of δ=1.0t-1.5t, where δ is the rolling width, and (t) is the thickness of the stock, and the pattern is transferred on the stock surface accompanied by fine rolling deformation of the stock. A roll in which D/t is in the range of 10-40 where (t) is the thickness of the stock, and D is the diameter of the forming roll, and the pattern is transferred while the stock is rolled at the draft in the range of 1-10%. The pattern is preferably formed on roll surface or a flat surface to be passed through the rolls together with the stock. Thus, the contact area of the roll with the stock is reduced, deformation of the stock to the side during the rolling is slightly permitted, and the rolling load is reduced.


Inventors:
Matsuzaki, Toshihiko
Murai, Masamitsu
Noya, Kazuo
Nakao, Kiyotaka
Application Number:
JP1995000346151
Publication Date:
June 24, 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; B21D31/00; (IPC1-7): B21D31/00; B21D22/02
Domestic Patent References:
JPH06198351A