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Method and apparatus for grinding a workpiece

  • US 5,562,523 A
  • Filed: 09/30/1994
  • Issued: 10/08/1996
  • Est. Priority Date: 09/30/1993
  • Status: Expired due to Term
First Claim
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1. 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 first and second grinding steps are performed successively at high and low infeed rates respectively for grinding said workpiece, said method comprising the steps of:

  • (1) measuring the diameter of said workpiece during said grinding steps;

    (2) detecting the infeed position of said grinding wheel relative to said workpiece during said grinding steps;

    (3) effecting said first grinding step;

    (4) calculating a back-off position at the end of said first grinding step, said back-off position being calculated based upon the relative position between said grinding wheel and said workpiece detected at the end of said first grinding step and the diameter of said workpiece measured at the end of said first grinding step;

    (5) moving said grinding wheel and said workpiece away from each other to locate one of said grinding wheel and said workpiece to said calculated back-off position; and

    (6) effecting said second grinding step.

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