Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1976-01-13
1977-09-06
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
511345R, 5116593, B24B 4900
Patent
active
040459195
ABSTRACT:
An apparatus for feed grinding workpieces comprises a workpiece spindle assembly for supporting a workpiece and a grinding wheel spindle assembly for supporting a grinding wheel, the two spindle assemblies being movable relative to each other to enable movement of the workpiece into pressure contact with the grinding wheel. A variable speed drive system rotationally drives the grinding wheel relative to the workpiece at a first predetermined speed of rotation different than the resonant frequency of the grinding wheel spindle assembly to effect feed grinding of the workpiece. Completion of the feed grinding or spark-out is detected after which the rotational speed of the grinding wheel is lowered to a second predetermined speed different than the resonant frequency of the grinding wheel spindle assembly when operating in the spark-out mode. The high speed rotation during feed grinding assures good grinding quality and the low speed rotation during spark-out assures good surface finishing. By rotating the grinding wheel spindle assembly at speeds other than its resonant frequencies, damage due to large vibrations of the assembly is avoided.
REFERENCES:
patent: 2612008 (1952-09-01), Kiniholm
patent: 2994995 (1961-08-01), Griffith
patent: 3798846 (1974-03-01), Smith
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Seiko Seiki Kabushiki Kaisha
Whitehead Harold D.
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