Internal grinder

Details Internal grinder Internal grinder

1989-03-14

1990-09-18

Hartman, J. J.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116571, 5116577, 5116593, B24B 4900

Patent

active

049569457

ABSTRACT:
An internal grinding apparatus having a grinding wheel attached to a spindle rotor radially and axially supported by electromagnetic bearings. Currents applied to the electromagnetic bearings are continuously controlled by a controlling system including a central processing unit during grinding work in order to adjust the longitudinal axis of the spindle rotor. The longitudinal axis of the spindle rotor is inclined and/or shifted at predetermined locations of the grinding wheel in a bore of a workpiece, thereby eliminating tapering of the long bore, and improving the cylindricality and straightness in grinding work.

REFERENCES:
patent: 4180946 (1980-01-01), Heijkenskjold et al.

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