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1.发明申请公开(公告)号：US20170120369A1
公开(公告)日：2017-05-04
申请号：US15319097
申请日：2015-05-20
申请人： NTN CORPORATION
发明人： Naoki NAKAGAWA , Shintaro SUZUKI , Kenichi NAKANO , Takuya FUJITA , Kiyohiro SUZUKI , Renji NATSUME , Tatsuro SUGIYAMA , Masazumi KOBAYASHI
CPC分类号： B23K15/0046 , B23K15/04 , B23K26/0823 , B23K26/21 , B23K26/282 , B23K33/006 , B23K2101/04 , B23K2103/04 , B23K2103/18 , F16D1/027 , F16D3/205 , F16D3/2055 , F16D3/223 , F16D3/227 , F16D2003/22326 , G01N29/043 , G01N29/225 , G01N29/28 , G01N2291/267
摘要： For butt-welding, which includes bringing joining end surfaces of a cup member and a shaft member into abutment against each other and radiating a high energy intensity beam from a radially outer side, the shaft member has a recess on a radially inner side of the joining end surface to obtain a welded portion having a closed hollow cavity on a radially inner side after butt-welding. The joining end surface (protruding surface) of the cup member protrudes toward a radially inner side with respect to an inner diameter of the joining end surface of the shaft member. With this, a welded portion of an outer joint member of a constant velocity universal joint, which is manufactured by joining the cup member and the shaft member, can be improved in strength and quality.
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2.发明申请公开(公告)号：US20170138406A1
公开(公告)日：2017-05-18
申请号：US15319625
申请日：2015-05-20
申请人： NTN CORPORATION
发明人： Jun NUMAMOTO , Kenichi NAKANO , Takuya FUJITA , Akira SERA , Hiroshi MATSUNAGA , Tatsuro SUGIYAMA , Masazumi KOBAYASHI
CPC分类号： F16D3/223 , B21J5/06 , B21J5/08 , B21K1/14 , B23K15/00 , B23K26/21 , F16D1/068 , F16D3/20 , F16D3/205 , F16D2003/22326 , F16D2250/0076 , Y10S29/048 , Y10S72/713 , Y10S72/714 , Y10S464/906 , Y10T29/49879 , Y10T403/478
摘要： A cup member has a cylindrical portion, a bottom portion, and a short shaft portion having a solid shaft shape and including a joining end surface at an end portion thereof. A shaft member has a solid shaft shape and includes a joining end surface at one end thereof. The joining end surfaces of the cup and shaft members are brought into abutment against each other and welded from a radially outer side to form a welded portion. At this time, center segregation is prevented from interfering with the welded portion. The cup member is formed by forging including upsetting a billet having a columnar shape successively in a plurality of stages, extruding the cylindrical portion and the short shaft portion, and ironing the cylindrical portion. In the course of the upsetting, a region of the billet corresponding to a bottom side of the cup member is narrowed.
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