Method for and apparatus of producing outer member of universal joint having cross-grooves
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United States of America Patent
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Jun 16, 1998
Grant Date -
N/A
app pub date -
Sep 18, 1996
filing date -
Sep 27, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A method for and an apparatus of producing an outer member of a universal joint having cross-grooves are provided in order to increase replenishability of the inner peripheral portion of the outer member. The outer member 1 is provided in a preformed material including a shaft 1a and a cylindrical portion 1b. A punch set 5 is fitted within the cylindrical portion 1b. The punch set is expandable and constrictable in the radial direction and includes a plurality of protrusions 3 having a configuration complementary to that of the cross-grooves. The cylindrical portion 1b is pressed into a die bore 8, starting with its opening portion 9, for performing an ironing operation.
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