Method and apparatus for grinding a workpiece

Details Method and apparatus for grinding a workpiece Method and apparatus for grinding a workpiece

1994-09-30

1996-10-08

Kisliuk, Bruce M.

Abrading

Precision device or process - or with condition responsive...

451 5, 451 11, B24B 4900, B24B 5100

Patent

active

055625231

ABSTRACT:
In a grinding method wherein a rotating workpiece and a rotating grinding wheel are relatively moved toward and away from each other and wherein at least three of rough, fine and finish grinding step are performed successively at high, medium and low infeed rates respectively for grinding the workpiece, the grinding wheel is retracted to a back-off position at the end of the rough grinding step. To calculate the back-off position, a first residual grinding amount which is left unground due to the bending of the workpiece is calculated based upon the diameter of the workpiece and the position of the grinding wheel which are detected respectively by an in-process measuring device and an absolute encoder at the end of the rough grinding step, and a second residual grinding amount of the workpiece at the end of the fine grinding step is estimated based upon the first residual grinding amount and a third residual grinding amount which has been calculated at the end of the finish grinding step for a preceding workpiece portion. The back-off position is calculated from the difference between the first and second residual grinding amounts.

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