Metal working – Method of mechanical manufacture – Gear making
Patent
1999-12-30
2000-11-28
Larson, Lowell A.
Metal working
Method of mechanical manufacture
Gear making
B21H 502
Patent
active
06151778&
ABSTRACT:
A wrought or powder metal gear preform is mounted for rotation about a first axis and then driven in meshing engagement with a roll forming die supported for rotation about a second axis transverse to the first axis. The roll forming die includes a helical worm thread that moves radially as well as axially across the face of the preform teeth to displace the material of the preform. In the case of a powder metal preform, displacement of the material acts to densify the teeth, whereas in the case of a wrought preform the gear teeth are burnished. The preform and roll forming die are separately driven to control densification.
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Trasorras Juan R. L.
Woolf Richard Mark
Federal-Mogul World Wide Inc.
Larson Lowell A.
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