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Numerical control grinding machine for grinding a taper portion of a workpiece

  • US 4,584,795 A
  • Filed: 03/20/1985
  • Issued: 04/29/1986
  • Est. Priority Date: 03/22/1984
  • Status: Expired due to Fees
First Claim
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1. A numerical control grinding machine, comprising:

  • a bed;

    a traverse table movably mounted on said bed;

    a swivel table mounted on said traverse table and pivotable about a pivot secured to said traverse table;

    workpiece support means mounted on said swivel table for supporting a workpiece to be rotatable about an axis which extends in the moving direction of said traverse table;

    a grinding wheel mounted on said bed and movable toward and away from said workpiece;

    a traverse feed device for moving said traverse table;

    a swivel feed device for pivotally moving said swivel table about said pivot;

    a wheel feed device for moving said grinding wheel toward and away from said workpiece;

    a measuring device engageable with a reference end surface of said workpiece for generating a signal when said reference end surface is located, through movement of said traverse table, at a predetermined position in the moving direction of said traverse table; and

    a numerical controller for controlling said traverse, swivel and wheel feed devices in response to said signal from said measuring device, said numerical controller including;

    first feed control means for controlling said traverse feed device so as to move said traverse table from an original position to a reference detecting position which is determined upon engagement with said reference end surface with said measuring device;

    feed amount detection means responsive to said signal for detecting a first feed amount through which said traverse table is moved from said original position to said reference detecting position;

    first calculation means for calculating the difference between said first feed amount detected by said feed amount detection means and a first predetermined value, said first predetermined value being indicative of a feed amount through which said traverse table would be moved from said original position to said reference detecting position if a workpiece model were supported by said workpiece support means;

    second calculation means for calculating based upon said calculated difference second and third feed amounts through which said traverse table and said grinding wheel are to be moved respectively so that said taper portion of said workpiece can be ground to a desired dimension;

    second feed control means for controlling said traverse feed device to move said traverse table by said calculated second feed amount from said reference detecting position;

    third feed control means for controlling said swivel feed device to pivot said swivel table by a predetermined angle; and

    fourth feed control means for controlling said wheel feed device to move said grinding wheel toward said workpiece by said calculated third feed amount.

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