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Grinding wheel balancing method and apparatus

  • US 5,243,788 A
  • Filed: 08/15/1990
  • Issued: 09/14/1993
  • Est. Priority Date: 09/11/1989
  • Status: Expired due to Fees
First Claim
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1. A method of balancing a grinding wheel comprising the steps of:

  • performing an unbalance measuring operation to determine the unbalanced nature of the grinding wheel;

    securing at least two balancing weights to the grinding wheel along at least one radius around the axis of the grinding wheel in balancing positions calculated from the measuring operation;

    locating and storing positions of said at least two weights;

    determining proper balancing positions of said at least two weights to balance the grinding wheel by effectively removing said at least two weights without actual physical movement of said at least two balancing weights; and

    repositioning said at least two weights to said proper balancing positions to balance the grinding wheel, wherein the step of determining proper positions of said at least two balancing weights includes vectorially adding unbalance vectors associated with force vectors resulting from the stored positions and respective masses of said at least two balancing weights together with a measured unbalance vector, thereby determining a grinding wheel unbalance vector and thereafter, repositioning said at least two balancing weights on the grinding wheel to compensate the grinding wheel unbalance vector, and wherein first and second balancing weights are utilized and each said balancing weight is arranged at a respective angle (α and

    β

    respectively) with respect to the angular position which is turned through 180°

    of the grinding wheel unbalance vector, the angles in the case of equal balancing weights satisfying the following equations;

    ##EQU5## and in the case of different balancing weights satisfying the following equations;

    ##EQU6## wherein Us designates the magnitude of the grinding wheel unbalance vector, S1 designates a scalar value which results from a mass of the one balancing weight and a radius at which that weight is movable around the axis of rotation of the grinding wheel, and S2 designates a scalar value which results from a mass of the other balancing weight and a radius at which that weight is movable around the axis of rotation of the grinding wheel.

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