Powder metal crown gear forming process

Details Powder metal crown gear forming process Powder metal crown gear forming process

1977-09-09

1978-09-05

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

291592, 72377, B21D 2200

Patent

active

041110315

ABSTRACT:
An improved method is disclosed for making spur gears having teeth with axially crowned working faces. A sintered powdered metal compact is formed in the shape of the desired gear, but slightly oversized and preferably with gear teeth having working faces that are uncrowned in the direction parallel to axis of rotation of the gear. The compact is forced into a smooth circular die cavity having a diameter slightly less than the outer diameter of the compact. Only the tips of the gear teeth engage the die wall. While the compact is constrained within the die, axial compressing forces are applied to it and gear teeth having axially crowned working faces are produced. At the same time, the gear is finish sized to desired dimensions.

REFERENCES:
patent: 3298219 (1967-01-01), Schober
patent: 3355930 (1967-12-01), Federov

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