Title:
【発明の名称】周壁部を有する板金体及びその周壁部の厚肉化方法
Document Type and Number:
Japanese Patent JP2964048
Kind Code:
B2
Abstract:
PCT No. PCT/JP96/01927 Sec. 371 Date Mar. 17, 1998 Sec. 102(e) Date Mar. 17, 1998 PCT Filed Jul. 10, 1996 PCT Pub. No. WO98/01246 PCT Pub. Date Jan. 15, 1998A sheet metal member thickening method according to the present invention comprises the steps of rotating a disc-shaped sheet metal member held between rotating dies, and pressing a first forming roller and a second forming roller subsequently against a periphery thereof while rotating it, thereby forming a base plate and a thickened peripheral wall thereof. A first forming step comprises plural small steps, including a previous small step in the first forming step and a post small step following the previous one. Between the previous small step and the post small step, a radius of curvature of the annular bottom surface of the forming surface of the first forming roller is greater than that of the annular bottom surface of the forming surface of the first forming roller employed in the previous small step, and an opening angle between a pair of annular forming surfaces of the forming surface of the first forming roller employed in the post steps is smaller than that between the pair of annular forming surfaces of the forming surface of the first forming roller employed in the previous small step.
Inventors:
Toshiaki Kanemitsu
Shuji Kanemitsu
Hironori Nishioka
Shuji Kanemitsu
Hironori Nishioka
Application Number:
JP50502798A
Publication Date:
October 18, 1999
Filing Date:
July 10, 1996
Export Citation:
Assignee:
Kanemitsu Co., Ltd.
International Classes:
B21D22/14; B21D53/26; B21H1/00; B21H1/04; B21K1/28; B21K1/42; B21K21/00; B21K23/04; F16S1/04; B21H7/18; (IPC1-7): B21H1/04; B21D53/26; B21K1/42
Domestic Patent References:
| JP6284846A | ||||
| JP747439A | ||||
| JP6360037A |
Attorney, Agent or Firm:
Koichi Suzue (1 person outside)