Textured lapping plate and process for its manufacture

Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool

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Details

51DIG6, 51307, 51295, 51319, B24D 1700

Patent

active

048214612

ABSTRACT:
A lapping plate is selectively textured for improved useful life and greater abrading consistency. Glass beads are serially propelled onto a lapping surface of the lapping plate in order to form spherical cavities of generally uniform size and distribution, and of a desired density. The cavities provide discontinuity in the lapping surface which substantially prevents workpiece hydroplaning. The cavities also receive loose abrading grit, workpiece fragments and other contaminants, resulting in more smoothly machined workpiece surfaces. Use of the lap plate with cavities also has been found to improve the co-planarity of composite magnetic transducing heads.

REFERENCES:
patent: 1082202 (1913-12-01), Krug
patent: 3041799 (1962-07-01), Kemman
patent: 3246430 (1966-04-01), Hurst
patent: 3287862 (1966-11-01), Abernathy
patent: 3486274 (1969-12-01), David
patent: 3683562 (1972-08-01), Day
patent: 3869263 (1975-03-01), Greenspan
patent: 3921342 (1975-11-01), Day
patent: 4037367 (1977-07-01), Kruse

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