Forging device and forging method for outer joint member of constant-velocity universal joint
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United States of America Patent
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Oct 25, 2022
Grant Date -
Dec 2, 2021
app pub date -
Dec 26, 2018
filing date -
Jan 9, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A forging apparatus includes an ironing mechanism and a phase alignment mechanism. The ironing mechanism includes: a punch set, which is fitted into a cylindrical portion of a pre-processing material to be formed into the outer joint member, and is radially expandable and contractible, the cylindrical portion having grooves formed in an inner peripheral surface thereof; and a die having a hole into which the cylindrical portion is press-fitted. The phase alignment mechanism is configured to align phases of the grooves in the inner peripheral surface of the pre-processing material and phases of track groove portion forming surfaces of the punch set with each other before the pre-processing material is fitted to the punch set.
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