Automatic spindle bearing adjustment

Details Automatic spindle bearing adjustment Automatic spindle bearing adjustment

B - Operations, Transporting

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341/108

B23Q 1/26 (2006.01) B23Q 11/14 (2006.01) B23Q 15/12 (2006.01) B23Q 15/18 (2006.01) F01M 5/00 (2006.01) F16C 19/52 (2006.01) F16C 25/06 (2006.01) F16C 25/08 (2006.01) F16C 33/66 (2006.01) F16N 7/32 (2006.01) F16N 7/34 (2006.01) F16N 29/00 (2006.01) F16N 29/02 (2006.01)

Patent

CA 1186775

ABSTRACT An adaptive control system for regulating the preload on the bearings that rotatably support a spindle. The preload on the bearings is adjusted by a piston of a piston and cylinder mechanism that bears against one of the races of the bearing. The axial and radial thrust applied to the rotating spindle is continuously monitored by thrust sensors. These sensors produce signals representing the measured thrust and such signals are transmitted to a computer. The computer, in turn, controls the operation of a pressure regulator in response to these signals to adjust the hydraulic pressure directed to the piston and cylinder mechanism. Such adjustment of the hydrau- lic pressure serves to likewise adjust the pressure applied to the bearing race by the piston for varying the preload on the bearing to obtain ideal operating characteristics for a broad expanse of conditions.

414360

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