Donald L TowneN Syracuse, NY

3994100, Nov 30, 1976

Jan 16, 1976

5/649857

Richard S. Shelden - Cherry Valley IL
Robert L. Schaller - Camillus NY
Donald L. Towne - North Syracuse NY

Sundstrand Syracuse, Inc. - Syracuse NY

B24B 2104
B24B 2118

51145T

A multi-station grinding machine having an index table carrying a plurality of work tables rotatable with respect thereto with means for oscillating the index table while simultaneously rotating a work table whereby a workpiece at a grinding station is caused to have compound movements relative to a grinding element at the grinding station. The structure at the grinding station includes a column carrying a grinding element with the column being mounted for pivotal movement to move the grinding element toward and away from the work table with the column being out of balance, whereby the weight thereof normally urges the column in a direction to move the grinding element away from the work table and with jack mechanism operable to move the column through infeed and fast infeed movements to advance the grinding element relative to the work table. The foregoing structure has hydraulic circuitry for supplying the hydraulic motors for the index table and work tables and the operating cylinders for the jack mechanism whereby a grinding cycle may be performed at a plurality of stations with the index table oscillating and the work tables rotating while the grinding elements are being advanced and with an additional work table being at a load-unload station to exchange an unfinished workpiece for a finished workpiece while grinding is occurring at the other stations.