Title:
歯車
Document Type and Number:
Japanese Patent JP5305123
Kind Code:
B2
Abstract:
The invention aims to improve not only the resistance to abrasion and scoring, but also the fatigue strength against pitting and chipping, without increasing the number of steps of the manufacturing process. The tooth face 2 of the gear is smoothed by gyro polishing. In the thus smoothed tooth face 2, a multitude of microscopic recesses 3 are randomly formed by liquid honing in which microscopic hard particles are collided with the tooth surface together with liquid. By the liquid honing, a large compressive residual stress is produced on the tooth face 2. This improves not only the resistance to abrasion and scoring, but also the fatigue strength against pitting and chipping, without increasing the number of steps of the manufacturing process.
Inventors:
Masanori Sato
Katsushi Abe
Katsushi Abe
Application Number:
JP2007307054A
Publication Date:
October 02, 2013
Filing Date:
November 28, 2007
Export Citation:
Assignee:
ntn corporation
International Classes:
F16H55/17; B24B31/00; B24C3/00; C21D7/06
Domestic Patent References:
| JP2006225741A | ||||
| JP2002130409A | ||||
| JP2002031212A | ||||
| JP2000280120A | ||||
| JP2591616Y2 |
Attorney, Agent or Firm:
Bunji Kamada
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro