Abrasive tool making process – material – or composition – With inorganic material – Clay – silica – or silicate
Patent
1974-10-21
1976-04-20
Smith, Al Lawrence
Abrasive tool making process, material, or composition
With inorganic material
Clay, silica, or silicate
51206P, B24B 100
Patent
active
039516199
ABSTRACT:
A grinding wheel has a series of deep and narrow circumferential grooves between circular grinding sections having radially convex surfaces for forming serrations in a knife edge. The grooves are filled with a non-abrasive substance to strengthen the wheel and prevent a build-up of grinding off-fall as well as providing an indication by sound and feel when grinding of the serrations in a knife edge is completed. One embodiment has a plurality of abrasive discs mounted on a holder with smaller diameter non-abrasive discs between each of the abrasive discs, to form grooves therebetween. The holder forms a hub for mounting the assembled wheel on a spindle. A second embodiment has a vitrified abrasive which is pressed to form a blank with a cylindrical outer surface and a hub portion for receiving a spindle. The blank is fired to a relatively low temperature so that it may be mounted on a spindle as narrow annular grooves are cut through its cylindrical surface, and the outer faces of the abrasive sections between the grooves are dressed to a convex radius half the thickness of the abrasive sections. The grooves are then filled with a non-abrasive material to a diameter less than that of the abrasive sections and the wheel is fired to a relatively high temperature to give the abrasive sections desired hardness.
REFERENCES:
patent: 1000813 (1911-08-01), Johnson
patent: 1045016 (1912-11-01), George
patent: 2144987 (1939-01-01), Miller
patent: 2691806 (1954-10-01), Janes
patent: 3395204 (1968-07-01), Olsson
patent: 3622288 (1971-11-01), Rue
Godici Nicholas P.
Ruemeli Robert F.
Smith Al Lawrence
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