Title:
金属製部材の製造方法
Document Type and Number:
Japanese Patent JP6849212
Kind Code:
B2
Abstract:
The present invention reduces the possibility of wrinkles forming between a cylindrical part and the periphery of a base thereof. A method for manufacturing a metal member is provided with a cylindrical part forming step S200 and a base wall thickness increasing step S202. The cylindrical part forming step S200 comprises forming a cylindrical part in a metal plate-shaped material. The base wall thickness increasing step S202 comprises increasing the wall thickness of a base portion of the cylindrical part. The base wall thickness increasing step S202 has an internal-peripheral-portion movement step S210 and a push-out step S214. In the internal-peripheral-portion movement step S210, a punch causes an internal peripheral portion on a distal-end side of the cylindrical part to move toward an internal peripheral portion on the base side. In the push-out step S214, the punch pushes out the moved portion of the cylindrical part moved in the internal-peripheral-portion movement step S210 in the opposite direction from the protrusion direction of the cylindrical part as viewed from the periphery of the base of the cylindrical part in a state in which the periphery of the base of the cylindrical part is interposed between a female die and a pressing die.
Inventors:
Naoki Fujii
Application Number:
JP2016227914A
Publication Date:
March 24, 2021
Filing Date:
November 24, 2016
Export Citation:
Assignee:
Kanemitsu Co., Ltd.
International Classes:
B21J5/08; B21D19/08; B21J5/06
Domestic Patent References:
| JP11138219A | ||||
| JP2005000977A |
Foreign References:
| CN102962360A | ||||
| US20100294064 |
Attorney, Agent or Firm:
Shoji Suzue
Tetsuro Yoshimura
Tetsuro Yoshimura