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Title:
METHOD OF MANUFACTURING OUTER JOINT MEMBER OF CONSTANT VELOCITY UNIVERSAL JOINT, AND OUTER JOINT MEMBER
Document Type and Number:
Japanese Patent JP2016003693
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an outer joint member, and the outer joint member capable of improving strength and quality of a welded part, and reducing manufacturing costs.SOLUTION: In an outer joint member of a constant velocity universal joint, a cup member 12a having a track groove 30 on its inner periphery and a shaft portion 13a formed on a bottom portion of the cut member 12a are composed of independent members, and the cut member 12a and the shaft member 13a are welded. The cut member 12a and the shaft member 13a are composed of medium carbon steel. The cut member 12a is integrally formed by forging processing, and then a joining end face 50 is prepared on an outer face of a bottom portion in a mechanical processing process. A joining end face 51 is formed on the shaft member 13a in the mechanical processing process, and the joining end face 50 of the cup member 12a and the joining end face 51 of the shaft member 13a are butted, and welded by radially applying beam from an outer side. The shaft member 13a has a step portion 54 on which the joining end face 51 is formed and a recessed portion 52 at a radial inner side formed by forging processing from a billet obtained by cutting a bar material.

Inventors:
NATSUME RENJI
HARADA KUNIAKI
MANO YOSHIYA
SUZUKI KIYOHIRO
TSUBOI SHUNICHIRO
NAGATAKE AKIRA
SUGIYAMA TATSURO
KOBAYASHI MASAZUMI
Application Number:
JP2014123466A
Publication Date:
January 12, 2016
Filing Date:
June 16, 2014
Export Citation:
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Assignee:
NTN CORP
International Classes:
F16D3/20; B21J1/06; B21J5/08; B21J13/02; B21K1/14; B23K15/00
Domestic Patent References:
JP2011226589A2011-11-10
JP2012057696A2012-03-22
JPH1078024A1998-03-24
JP2004197912A2004-07-15
JP2006289500A2006-10-26
JP2011226589A2011-11-10
JP2012057696A2012-03-22
JPH1078024A1998-03-24
JP2004197912A2004-07-15
JP2006289500A2006-10-26
Attorney, Agent or Firm:
Kunihiko Shiromura
Kumano 剛