Constant velocity universal joint outer joint member and manufacturing method for same
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United States of America Patent
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Jul 16, 2019
Grant Date -
Jun 8, 2017
app pub date -
May 20, 2015
filing date -
Jun 18, 2014
priority date (Note) -
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status (Latency Note)
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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.
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