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Patent Searching and Data


Title:
CONCAVE PORTION FORMING METHOD ON METAL PLATE
Document Type and Number:
Japanese Patent JP3318907
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To form a concave portion on one face of a metal plate wherein a desired shape of the concaved portion can be made without causing a big stress to the metal plate by the formation of the concaved portion.
SOLUTION: In this method, a given shape of concaved portion 2, with a depth shallower than the thickness of the metal, is press-formed by a press and the like from one face 1a side of the metal plate 1 of a given thickness. At the same time, a convex portion 3 is protrudedly formed on other face 1b side of the metal plate 1 and, the metal of the concaved portion 2 is transferred. Thereafter, the convexed portion 3 on the other face 1b side is cut by a cutting processing, and then, the concaved portion 2 is formed on one face 1a side of the metal plate 1.


Inventors:
Miyahara, Hideyuki
Application Number:
JP1997000282768
Publication Date:
June 21, 2002
Filing Date:
September 29, 1997
Export Citation:
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Assignee:
NAKAMURA SEISAKUSHO KK
International Classes:
B23P13/00; B21D22/02; B21D22/04; (IPC1-7): B21D22/04; B21D22/02; B23P13/00