Tripod type constant-velocity universal joint and method for producing the same
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jan 26, 2012
app pub date -
Apr 2, 2010
filing date -
Apr 20, 2009
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Abstract
A manufacturing method for a tripod type constant velocity universal joint includes, when forging a raw-shaped material corresponding to each of three journals into a journal shape using a molding surface of a die and in a state where a relief portion is provided on a raw-shaped-material-leading-end-side of the die, molding an outer peripheral surface of the raw-shaped material into a projected round shape. The molding occurring with a tapered surface formed on the molding surface with which the outer peripheral surface of the raw-shaped material is held in contact and a recessed round surface formed between the molding surface and the tapered surface.
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