Computer controller optical surfacing (CCOS) lap pressure contro

Details Computer controller optical surfacing (CCOS) lap pressure contro Computer controller optical surfacing (CCOS) lap pressure contro

1985-09-18

1986-12-09

Olszewski, Robert P.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51109R, 51209R, B24B 700

Patent

active

046271953

ABSTRACT:
A rotary lapping system and process is disclosed for producing a controlled pressure gradient, including positive and negative lift, when lapping a workpiece coated with an abrasive slurry liquid with a plurality of grinding pads mounted beneath a rotating lap substrate. To obtain positive and negative lift, the grinding pads are tilted with respectively a positive and negative angle of attack, which hydrodynamically reacts with the abrasive slurry liquid to produce the desired lift. The controlled pressure gradient is further varied by decentering the rotation of lap substrate.

REFERENCES:
patent: 843624 (1907-02-01), Peirce
patent: 1293334 (1919-02-01), Challet
patent: 2423118 (1947-07-01), Ramsay
patent: 3517466 (1970-06-01), Bouvier
patent: 3699721 (1972-10-01), Beasley

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