Title:
ハイドロフォーム加工方法およびそれに用いられる金型
Document Type and Number:
Japanese Patent JP4855928
Kind Code:
B2
Abstract:
According to the hydroforming method by the invention, when slots with the aspect ratio of 3 or more are pierced onto the bulge-formed portion made by the hydroforming, even the piercing can be carried out within a series of processing steps in the hydroforming, thereby eliminating the piercing operation by means of the cumbersome machining process such as milling and ensuring an excellent slot configuration. Thus, the hydroformed parts by the invention are best suited for the automobile parts etc. where various piercing operations are required, and the mold used for the hydroforming method by the invention can be widely employed for processing the automobile parts etc., whereby the invention can be applied for processing the parts in automobiles and industrial machineries as well.
Inventors:
Mitsutoshi Uchida
Application Number:
JP2006510242A
Publication Date:
January 18, 2012
Filing Date:
February 18, 2005
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
Nippon Seiko Co., Ltd.
nsk Steering Systems Co., Ltd.
Sumitomo Steel Pipe Co., Ltd.
Nippon Seiko Co., Ltd.
nsk Steering Systems Co., Ltd.
Sumitomo Steel Pipe Co., Ltd.
International Classes:
B21D28/28; B21D26/033; B21D26/035; B21D28/24; B21D28/34; B21D53/88
Domestic Patent References:
| JP2000351029A | 2000-12-19 | |||
| JPH07223028A | 1995-08-22 | |||
| JPH0810869A | 1996-01-16 | |||
| JP2003112222A | 2003-04-15 | |||
| JPS4540783B1 | ||||
| JPS447626B1 |
Attorney, Agent or Firm:
Michio Mori