Manufacturing method of outer joint member of constant velocity universal joint and outer joint member

Title:

Manufacturing method of outer joint member of constant velocity universal joint and outer joint member

Document Type and Number:

Japanese Patent JP6320855

Kind Code:

B2

Abstract:

Provided is a method of manufacturing an outer joint member (11, 11 2 ) of a constant velocity universal joint, the outer joint member (11, 11 2 ) being constructed by forming, through use of separate members, a cup section (12, 12 2 ) having track grooves (30, 30 2 ) formed at an inner periphery of the cup section (12, 12 2 ) and engageable with torque transmitting elements (19, 41), and a shaft section (13) formed at a bottom portion of the cup section (12, 12 2 ), and by welding a cup member (12a, 12a 1 , 12a 2 ) forming the cup section (12, 12 2 ) and a shaft member (13a) forming the shaft section (13), the method including: forming the cup member (12a, 12a 1 , 12a 2 ) and the shaft member (13a) of medium carbon steel; preparing, as the cup member (12a, 12a 1 , 12a 2 ), a cup member (12a, 12a 1 , 12a 2 ) having a cylindrical portion (12a1, 12a1 1 , 12a1 2 ) and a bottom portion (12a2, 12a2 1 , 12a2 2 ) integrally formed by forging, and a joining end surface (50, 50 1 ) formed on an outer surface of the bottom portion in a machining step after the forging; preparing, as the shaft member (13a), a shaft member (13a) having a joining end surface (51) to be joined to the bottom portion (12a, 12a 1 , 12a 2 ) of the cup member (12a, 12a 1 , 12a 2 ), which is formed in a machining step; bringing the joining end surface (50, 50 1 ) of the cup member (12a, 12a 1 , 12a 2 ) and the joining end surface (51) of the shaft member (13a) into abutment against each other; and welding the cup member (12a, 12a 1 , 12a 2 ) and the shaft member (13a) by radiating a beam from an outer side of the cup member (12a, 12a 1 , 12a 2 ) to an abutment portion between the cup member (12a, 12a 1 , 12a 2 ) and the shaft member (13a) in a radial direction of the cup member, the joining end surface (50, 50 1 , 50 2 , 50 3 ) of the cup member (12a, 12a 1 , 12a 2 , 12a 3 ) and the joining end surface (51, 51 1 , 51 3 ) of the shaft member (13a, 13a 1 , 13a 3 , 13b) having a dimension difference between outer diameters (B1, B1 1 , B1 3 , B2, B2 1 , B2 3 ) thereof.

Inventors:

Takeshi Shimazawa
Naoki Nakagawa
Hiraoka Tsuneaki
Shintaro Suzuki
Tatsuro Sugiyama
Masazumi Kobayashi

Application Number:

JP2014125497A

Publication Date:

May 09, 2018

Filing Date:

June 18, 2014

Export Citation:

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