Title:
リンクチェーン
Document Type and Number:
Japanese Patent JP5145348
Kind Code:
B2
Abstract:
A bush (9) is pressed into a link plate in a turning link rank (1 2 ) that turns relatively with a pin (3). The bush (9) is molded into a seamless cylindrical shape by cold-forging and is coated with a metal carbide layer formed by cementation of chrome, vanadium and others and having Vickers hardness of 1300 Hv or more similarly to the pin. After that, the bush (9) is treated by a quenching, tempering or isothermal transformation process. Thereby, wear resistance of the pins and the link plates of a silent (link) chain is improved, productivity is improved and the cost is cut.
Inventors:
Yoshihiro Shimada
Nobuyuki Suai
Nobuyuki Suai
Application Number:
JP2009534103A
Publication Date:
February 13, 2013
Filing Date:
September 27, 2007
Export Citation:
Assignee:
DAIDO KOGYO CO.,LTD.
International Classes:
F16G13/06; C21D1/06; C21D9/00; C22C38/00; C23C8/22; C23C10/28; F16G13/02
Domestic Patent References:
| JP2005351369A | 2005-12-22 | |||
| JP2000249196A | 2000-09-12 | |||
| JP2005281788A | 2005-10-13 | |||
| JPH09269035A | 1997-10-14 |
Attorney, Agent or Firm:
Kazuo Chikajima