Title:
METHOD OF PRESS-FORMING PRESS FORMED ARTICLE
Document Type and Number:
Japanese Patent JP2009125780
Kind Code:
A
Abstract:
To improve the yield of the high-accuracy press working of a metal sheet composed of a sheet lubricating film precoated material and a sheet lubricating film post-coated material by preventing the positional deviation caused by shrinkage in the width direction when drawing it by forming V-shaped notches on both sides of the metal sheet at the same time as drawing work.
There are provided a method of press-forming the press-formed article, and a constitution in which, the V-shaped notches (50) for positioning are formed on both sides of the metal sheet (10) in a press-position of the drawing at the same time as the drawing and positioning in the directions of two axes is performed in the process of the drawing and on and after the drawing.
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Inventors:
Sugama, Junji
Ishikawa, Hanji
Takahashi, Suetsugu
Ishikawa, Hanji
Takahashi, Suetsugu
Application Number:
JP2007000304595
Publication Date:
June 11, 2009
Filing Date:
November 26, 2007
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
B21D43/00; B21D22/20; B21D28/24; B21D43/00; B21D22/20; B21D28/24
