B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
B23P 15/00 (2006.01) B24B 39/04 (2006.01) F16D 3/02 (2006.01) F16D 3/06 (2006.01) F16D 3/84 (2006.01)
Patent
CA 2326620
A method for manufacturing a slip yoke for use with a transmission in a vehicle drive train assembly includes an initial step of near net forming an unfinished slip yoke, such as forging or casting. Portions of the slip yoke may be finished machined, if necessary. Then, an outer surface of the slip yoke is subjected to a burnishing process. Burnishing is a metal working process wherein one or more rollers are moved into engagement with the outer surface of the slip yoke as it is rotated. The pressure generated by the rollers re-shapes the outer surface of the slip yoke to a very smooth surface without the removal of material. The result is a tough, work hardened, wear-resistant, and corrosion-resistant surface for the outer surface of the slip yoke, having a mirror-like smooth finish. Lastly, the burnished slip yoke is installed on an output shaft of a transmission, wherein it is engaged by a seal. Slip yokes manufactured in accordance with the burnishing process of this invention have been found to provide significantly better results than slip yokes manufactured using the prior art grinding method.
Larochelle Paul
Wagner Brad W.
Dana Corporation
Ridout & Maybee Llp
LandOfFree
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