Title:
シェル形針状ころ軸受用軌道輪およびその製造方法
Document Type and Number:
Japanese Patent JP4080182
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve precisions of surface roughness, cylindricality and roundness of a trial ring of shell shaped needle roller bearing. SOLUTION: After an iron punch 20 is inserted to contact a bottom of a deeply drawn cap shaped shell material 10 and press the cap shaped shell material 10 into a dice hole 31 of a dice 30 keeping the ironing punch 20 inserting, an inner periphery surface 2 of a cap shape is ironing treated by drawing an ironing punch 20.
Inventors:
Shintoshi Masatoshi
Application Number:
JP2001191564A
Publication Date:
April 23, 2008
Filing Date:
June 25, 2001
Export Citation:
Assignee:
ntn corporation
International Classes:
F16C33/64; B21D22/28; B21D51/16; B21D53/10; F16C19/46
Domestic Patent References:
| JP8284951A | ||||
| JP7265987A | ||||
| JP2000065050A | ||||
| JP10146638A | ||||
| JP29001104B1 |
Attorney, Agent or Firm:
Shogo Ehara
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura