Title:
二部構造のボールピンのための球要素及び球要素の製造方法
Document Type and Number:
Japanese Patent JP2007538203
Kind Code:
A
Abstract:
A process is provided for manufacturing balls, especially for ball and socket joints, as well as to a ball element for two-part ball pivots. The microalloyed carbon-manganese steel balls are manufactured by cold extrusion and subsequent grinding. Annealing can thus be completely eliminated, as a result of which a less expensive material can be used. The process makes possible a manufacture of balls especially for two-part ball pivots in a simpler manner and at a lower cost, and the surface finish and the material quality as well as the strength and the wear resistance are at the same time preserved or increased. As a result, the effort needed to manufacture the balls is reduced, and, moreover, the problem of the impact marks often developing on the ball surfaces during tempering is eliminated.
Inventors:
Yohen Kruse
Dirk Adam Chik
Reinhard Stetelau
Jean-Paul Castane
Dirk Adam Chik
Reinhard Stetelau
Jean-Paul Castane
Application Number:
JP2007511851A
Publication Date:
December 27, 2007
Filing Date:
May 02, 2005
Export Citation:
Assignee:
ZF Friedrichshafen AG
International Classes:
F16C11/06; B21K1/02; B21K1/76; C21D7/02; C21D8/00; C22C38/00; C22C38/04; C22C38/46; C21D9/36
Domestic Patent References:
| JPH08238534A | 1996-09-17 | |||
| JPH07259840A | 1995-10-09 | |||
| JPS6487717A | 1989-03-31 | |||
| JPS6412118A | 1989-01-17 | |||
| JPH05346114A | 1993-12-27 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Einzel Felix-Reinhard
Reinhard Einsel