Lapping internal surfaces

Details Lapping internal surfaces Lapping internal surfaces

1988-10-07

1990-05-29

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51 93, 51290, 51DIG6, B24B 3300

Patent

active

049284347

ABSTRACT:
In improved equipment for lapping internal surfaces, use is made of a composite lap, the rod of which is held by the tool spindle and inserted with a marginal degree of clearance into a cone that carries the abrasive shell, and a chucking mechanism located beneath and coaxial with the spindle and lap; errors are avoided, particularly with smallbore work, by embodying the lap rod in three rigidly associated sections, namely, a polygonal tip, insertable and fastened with a transverse pin in a matching polygonal socket offered by the cone, a flexible coupling section, and a shank uppermost that is screwed into or otherwise clamped to the spindle. Work to be lapped is held in a chuck suspended from at least three cables threaded through relative peripheral mountings afforded by the chuck itself.

REFERENCES:
patent: 3352067 (1967-11-01), Estabrook
patent: 4223485 (1980-09-01), Largeteau
patent: 4615152 (1986-10-01), Bogaert

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