Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1979-03-22
1981-03-10
Whitehead, Harold D.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51 88, B24B 100, B24B 512
Patent
active
042545889
ABSTRACT:
A method of controlling infeed in simultaneously grinding the inner and outer diameters of an annular workpiece with a multiple infeed speed. The method comprises, while supervising the amounts of infeed of the internal and external grind infeeding heads, the finish dimensions of the inner and outer diameters of the workpiece, the infeed positions of the internal and external grind infeeding heads, and the time when inner and outer diameter dimension signals are sent, starting the simultaneous rough grinding of the inner and outer diameters at rough grinding infeed speeds so determined as to simultaneously reach predetermined allowances for precision grinding, completing the rough grinding of the inner diameter in response to a signal indicating the completion of the rough grinding of the outer diameter, and starting precision grinding at precision grinding infeed speeds so determined that when the precision grinding of one diameter is completed, the other diameter has a predetermined allowance for precision grinding left.
REFERENCES:
patent: 2807916 (1957-10-01), Squire
Nakajima Kazuyoshi
Onoda Makoto
NTN Toyo Bearing Company Limited
Whitehead Harold D.
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