Method and planetary-type lapping machine for lapping a...

B - Operations – Transporting – 24 – B

Patent

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51/75

B24B 7/16 (2006.01)

Patent

CA 1086064

ABSTRACT OF THE DISCLOSURE A planetary-type lapping machine comprises a station- ary and a rotary lapping discs, and cages arranged therebetween, the cages being essentially planet pinions of a sun-and-planet mechanism and containing the components being machined. The rotary lapping disc is in a force transmitting connection with the sun gear through a differential gear link. The differential gear link enables approximately double increase in the angular speed of the lapping disc relative to the angular speed of rotation of the center of said cages about the axis of rotation of said lapping disc. This relieves the cages from forces applied on the part of the plates being machined. To maintain parallelism of the lapping discs incor- porated in the drive link of one of the sun gears is a controll- able differential gear link whereby the speed of rotation of the sun gear is varied per cycle.

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