Method of concentric grinding

Details Method of concentric grinding Method of concentric grinding

1977-03-04

1979-02-06

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51289R, 279 2R, 269 481, 51227R, B24B 100

Patent

active

041376749

ABSTRACT:
A holder for use in cutting the outside surface of a cylindrical blank, the inner bottom of which has a concave spherical seat, to make said outside surface concentric with said concave spherical seat, characterized in that a rotatable shaft of a smaller outside diameter than the inner diameter of said blank and having a tip bearing against said concave spherical seat is provided longitudinally with three equi-distant grooves. A concave spherical surface is formed at the bottom of each of said grooves and this surface has a concave spherical surface of radius R with its axis running at right angles to the longitudinal direction of said rotatable shaft. In each groove of said shaft is slidably inserted an expansion pawl having at its top a projection bearing against the inside surface of said blank and having at its bottom a convex spherical surface of radius r (R > r). The invention includes a method of correcting concentricity by using said holder.

REFERENCES:
patent: 1976109 (1934-10-01), Archea
patent: 2698551 (1955-01-01), Olsen
patent: 2922592 (1960-01-01), Kaltenbach
patent: 3792856 (1974-02-01), Hernandez

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