Title:
等速自在継手の外側継手部材の製造方法
Document Type and Number:
Japanese Patent JP6396087
Kind Code:
B2
Abstract:
A cup member (12a) has a cylindrical portion (12a1), a bottom portion (12a2), and a short shaft portion (12a3) having a solid shaft shape and including a joining end surface (50) at an end portion thereof. A shaft member (13a) has a solid shaft shape and includes a joining end surf ace (51) at one end thereof. The joining end surface (50) of the cup member (12a) and the joining end surface (51) of the shaft member (13a) are brought into abutment against each other and welded through radiation of a high energy intensity beam from a radially outer side to form a welded portion (49) having an annular shape. At this time, center segregation (S) is prevented from interfering with the welded portion (49). The cup member (12a) is formed by forging. The forging includes upsetting a billet having a columnar shape successively in a plurality of stages, extruding the cylindrical portion (12a1) and the short shaft portion (12a3), and ironing the cylindrical portion (12a3). In the course of the upsetting, a region of the billet corresponding to a bottom side of the cup member (12a) is narrowed. With this, an outer joint member of a constant velocity universal joint, which is manufactured by joining a cup member and a shaft member through welding, is improved in strength and quality of a welded portion.
Inventors:
Jun Numamoto
Kenichi Nakano
Takuya Fujita
Masaru Sera
Koji Matsunaga
Tatsuro Sugiyama
Masazumi Kobayashi
Kenichi Nakano
Takuya Fujita
Masaru Sera
Koji Matsunaga
Tatsuro Sugiyama
Masazumi Kobayashi
Application Number:
JP2014125502A
Publication Date:
September 26, 2018
Filing Date:
June 18, 2014
Export Citation:
Assignee:
ntn corporation
International Classes:
F16D3/20; B21J5/06; B21J5/08; B21K1/14; B23K15/00
Domestic Patent References:
| JP2012057696A | ||||
| JP2013188758A | ||||
| JP6269895A | ||||
| JP2002254132A | ||||
| JP2013245806A |
Attorney, Agent or Firm:
Kunihiko Shiromura
Tsuyoshi Kumano
Tsuyoshi Kumano