公开(公告)号：EP3159095A4

公开(公告)日：2018-03-14

申请号：EP15809146

申请日：2015-05-20

Applicant: NTN TOYO BEARING CO LTD

Inventor： NAKAGAWA NAOKI ,  SUZUKI SHINTARO ,  NAKANO KENICHI ,  FUJITA TAKUYA ,  SUZUKI KIYOHIRO ,  NATSUME RENJI ,  SUGIYAMA TATSURO ,  KOBAYASHI MASAZUMI

IPC: B23K26/21 ,  B23K15/00 ,  B23K15/04 ,  B23K26/08 ,  B23K26/282 ,  B23K33/00 ,  B23K101/04 ,  B23K103/04 ,  B23K103/18 ,  F16D3/20

CPC classification number: B23K15/0046 ,  B23K15/04 ,  B23K26/0823 ,  B23K26/21 ,  B23K26/282 ,  B23K33/006 ,  B23K2201/04 ,  B23K2203/04 ,  B23K2203/18 ,  F16D3/20 ,  F16D3/205 ,  F16D3/223 ,  F16D2003/22326 ,  G01N29/043 ,  G01N29/225 ,  G01N29/28 ,  G01N2291/267

Abstract: For butt-welding, which includes bringing joining end surfaces (50 and 51) of a cup member (12a) and a shaft member (13a) into abutment against each other and radiating a high energy intensity beam from a radially outer side, the shaft member (13a) has a recess (52 or 53) on a radially inner side of the joining end surface (51) to obtain a welded portion (49) having a closed hollow cavity on a radially inner side after butt-welding. The joining end surface (50) (protruding surface (50a)) of the cup member (12a) protrudes toward a radially inner side with respect to an inner diameter (E) of the joining end surface (51) of the shaft member (13a). With this, a welded portion (74) of an outer joint member (11) of a constant velocity universal joint (10), which is manufactured by joining the cup member (12a) and the shaft member (13a), can be improved in strength and quality.

公开(公告)号：EP3159567A4

公开(公告)日：2018-03-14

申请号：EP15810262

申请日：2015-05-20

Applicant: NTN TOYO BEARING CO LTD

Inventor： NUMAMOTO JUN ,  NAKANO KENICHI ,  FUJITA TAKUYA ,  SERA AKIRA ,  MATSUNAGA HIROSHI ,  SUGIYAMA TATSURO ,  KOBAYASHI MASAZUMI

IPC: F16D3/20 ,  B21J5/06 ,  B21J5/08 ,  B21K1/14 ,  B23K15/00 ,  B23K26/21 ,  F16D1/068 ,  F16D3/205 ,  F16D3/223

CPC classification number: F16D3/223 ,  B21J5/06 ,  B21J5/08 ,  B21K1/14 ,  B23K15/00 ,  B23K26/21 ,  F16D1/068 ,  F16D3/20 ,  F16D3/205 ,  F16D2003/22326 ,  F16D2250/0076

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.