Title:
接続部の製造方法
Document Type and Number:
Japanese Patent JP6896687
Kind Code:
B2
Abstract:
After an annular plate is blanked from a metal flat plate in a blanking step, an inner peripheral portion of the annular plate is deformed upward in a burring step. As a result, a hat-shaped intermediate product having an upstanding tubular portion and an annular plate portion is formed. After that, an outer peripheral portion of the annular plate portion is folded step by step toward an inner peripheral side of the annular plate portion. As a result, a folded portion composed of a first folded portion and a second folded portion is formed, whereby a connection portion having a second flange portion is formed.
Inventors:
Toru Kojima
Application Number:
JP2018182047A
Publication Date:
June 30, 2021
Filing Date:
September 27, 2018
Export Citation:
Assignee:
Aisin Takaoka Co., Ltd.
International Classes:
B21D51/16; B21D19/08; B21D19/12; F16L23/032; F16L23/08
Domestic Patent References:
| JP56147987A | ||||
| JP10094846A |
Foreign References:
| US20020067950 | ||||
| US20080191465 | ||||
| US3455582 | ||||
| US20150367394 | ||||
| CN201359140Y |
Attorney, Agent or Firm:
Tsuyoshi Yamada