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Title:
OUTER JOINT MEMBER OF CONSTANT VELOCITY UNIVERSAL JOINT AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2016003735
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent cracking of a welded part of an outer joint member of a constant velocity universal joint in which a cup member and a shaft member are welded.SOLUTION: In an outer joint member 11 of a constant velocity universal joint in which a cup member 12a and a shaft member 13a are welded, the cup member 12a and the shaft member 13a are composed of medium-high carbon steel. The cup member 12a has the bottomed cylindrical shape opened at one end, and is composed of a cylindrical portion 12a1, a bottom portion 12a2, and a solid shaft-shaped short shaft portion 12a3 projecting from the bottom portion 12a2 and having a joining end face 50 on an end portion. The shaft member 13a has the solid shaft-shape, and has a joining end face 51 on one end. The joining end face 50 of the cup member 12a and the joining end face 51 of the shaft member 13a are butted, and a welded part 49 is formed by radially applying beam of high energy density from an outer side. A structure of melted metal of the welded part 49 has a mixture phase of ferrite and granular cementite.

Inventors:
KAGAWA DAISUKE
HIRAOKA TSUNEAKI
SUZUKI SHINTARO
NAKAGAWA NAOKI
SUGIYAMA TATSURO
KOBAYASHI MASAZUMI
Application Number:
JP2014125499A
Publication Date:
January 12, 2016
Filing Date:
June 18, 2014
Export Citation:
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Assignee:
NTN CORP
International Classes:
F16D3/20; B23K15/00; B23K26/21
Domestic Patent References:
JP2013100859A2013-05-23
JP2013245806A2013-12-09
JPH05208280A1993-08-20
JPS6357960A1988-03-12
Attorney, Agent or Firm:
Kunihiko Shiromura
Kumano 剛
Yoshiyuki Shiraishi