发明名称 |
METHOD OF MANUFACTURING RECTANGULAR TUBE HAVING STEPPED PORTION |
摘要 |
A method of manufacturing a rectangular tube having a stepped portion includes: forming V-shaped grooves on a rectangular tube at surfaces of an end thereof in a direction parallel to a longitudinal direction thereof; and pressing each of the surfaces having the V-shaped grooves formed thereon from outside to inside, whereby the end of the rectangular tube is radially reduced. |
申请公布号 |
US2015273558(A1) |
申请公布日期 |
2015.10.01 |
申请号 |
US201414229351 |
申请日期 |
2014.03.28 |
申请人 |
TANOUE Ryuji;SASAKI Hirokazu;NAKAMURA Naofumi;KUROBE Jun |
发明人 |
TANOUE Ryuji;SASAKI Hirokazu;NAKAMURA Naofumi;KUROBE Jun |
分类号 |
B21D19/10 |
主分类号 |
B21D19/10 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method of manufacturing a rectangular tube having a stepped portion comprising:
forming V-shaped grooves on a rectangular tube at surfaces of an end thereof in a direction parallel to a longitudinal direction thereof; and pressing each of the surfaces having the V-shaped grooves formed thereon from outside to inside, whereby the end of the rectangular tube is radially reduced. |
地址 |
Sakai JP |