公开(公告)号：US20170159719A1

公开(公告)日：2017-06-08

申请号：US15319613

申请日：2015-05-20

Applicant: NTN Corporation

Inventor： Daisuke KAGAWA ,  Tsuneaki HIRAOKA ,  Shintaro SUZUKI ,  Naoki NAKAGAWA ,  Tatsuro SUGIYAMA ,  Masazumi KOBAYASHI

IPC: F16D3/223 ,  F16D3/205 ,  F16D1/068 ,  B23K15/00

CPC classification number: F16D3/223 ,  B23K15/0006 ,  B23K15/002 ,  B23K15/0033 ,  B23K15/0053 ,  B23K15/04 ,  B23K15/06 ,  B23K26/0823 ,  B23K26/242 ,  B23K26/282 ,  B23K26/32 ,  B23K2101/04 ,  B23K2103/04 ,  B23K2103/18 ,  C21D9/50 ,  C21D2211/003 ,  C21D2211/005 ,  F16D1/027 ,  F16D1/068 ,  F16D3/205 ,  F16D3/2055 ,  F16D3/227 ,  F16D2003/22326 ,  F16D2250/0076 ,  Y10S464/906

Abstract: In an outer joint member of a constant velocity universal joint, a cup member and a shaft member are made of medium to high carbon steel and welded together. The cup member has a bottomed cylindrical shape that is opened at one end, and includes a cylindrical portion, a bottom portion, and a short shaft section of a solid shaft shape protruding from the bottom portion and having a joining end surface. The shaft member has a solid shaft shape and a joining end surface. The joining end surfaces of the cup and shaft members are brought into abutment against each other, and a high energy intensity beam is radiated from an outer side in a radial direction to form a welded portion. A structure of a molten metal at the welded portion is in a mixed phase of ferrite and granular cementite.

公开(公告)号：US20170234836A1

公开(公告)日：2017-08-17

申请号：US15502872

申请日：2015-07-23

Applicant: NTN CORPORATION

Inventor： Hiromi NAGAI ,  Daisuke KAGAWA ,  Naoki NAKAGAWA ,  Takashi IMANAKA ,  Yasuhiko SAKAKIBARA ,  Tokio UEDA ,  Masazumi KOBAYASHI ,  Tatsuro SUGIYAMA

IPC: G01N29/04 ,  G01N21/95

Abstract: An inspection device inspects a joint-type outer joint member of a constant velocity universal joint that includes a cup section having a bottomed cylindrical shape and track grooves in an inner periphery thereof for torque transmitting elements, and a shaft section extending from a bottom of the cup section. The inspection device inspects the outer joint member, which is obtained through melt-welding on a cup member forming the cup section and a shaft member forming the shaft section. The inspection device includes a surface inspection unit to inspect for a defect which appears on a surface of the outer joint member due to welding, an internal inspection unit to inspect for an internal defect of a welded portion, and a recording unit to record an inspection result of the inspection. The inspection device is configured to efficiently perform in-line total inspection for the melt-welded joint-type outer joint member.