Title:
ワッシャの製造方法及びワッシャ
Document Type and Number:
Japanese Patent JP6513501
Kind Code:
B2
Abstract:
A method of manufacturing a washer capable of improving a material yield is provided. The method includes: a preparation step of preparing a longitudinal member N1 which includes an upper corrugated portion 20 and a lower corrugated portion 30 including crest portions 21, 31 formed on at least one of an upper surface and a lower surface and valley portions 22, 32 continuous to the crest portions 21, 31 in the right-left direction; and a deformation step of deforming the longitudinal member N1 such that the upper surface and the lower surface are arcuate as viewed in the direction from the front to the rear.
Inventors:
Yoichi Ochiai
Application Number:
JP2015120134A
Publication Date:
May 15, 2019
Filing Date:
June 15, 2015
Export Citation:
Assignee:
Taiho Kogyo Co., Ltd.
International Classes:
B21D53/20; B21D11/20; F16B43/00
Domestic Patent References:
| JP51141767A | ||||
| JP49067301A | ||||
| JP1135138U | ||||
| JP53091063A | ||||
| JP10223412A | ||||
| JP2003328512A | ||||
| JP53117885U | ||||
| JP5994610U |
Attorney, Agent or Firm:
Toyohiko Nagata
Takafumi Hidefumi
Takafumi Hidefumi