Title:
金属製薄板製品の残留応力低減方法
Document Type and Number:
Japanese Patent JP4441183
Kind Code:
B2
Abstract:
To provide a method and a mold assembly for reducing, at a low cost and effectively, the residual stress of a metal sheet product after processing.
In the method for reducing the residual stress, after the metal sheet product 1 is heated or is processed at room temperature, dies 2 and 2' which are colder than the room temperature and have the reversed shape of the product are pressed against the metal sheet product 1 from its top and bottom surfaces. In this case, it is preferable to keep the die pressing force at 10% or lower of the yield stress of the metal sheet product and to make the clearance between a cope or drag and the metal sheet product 10% or thinner of the thickness of the metal sheet product.
COPYRIGHT: (C)2004,JPO
Inventors:
Noriyuki Suzuki
Application Number:
JP2003012111A
Publication Date:
March 31, 2010
Filing Date:
January 21, 2003
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21D1/00; B21D22/02; B21D37/16
Domestic Patent References:
| JP52035160A | ||||
| JP2256294A |
Attorney, Agent or Firm:
Hiroaki Tamura
Tsugeko Shigeo
Yoshiyuki Watanabe
Daisuke Yoshisako
Tomoyuki Yabuki
Tsugeko Shigeo
Yoshiyuki Watanabe
Daisuke Yoshisako
Tomoyuki Yabuki