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Numerically controlled machine tool and method of controlling grinding operation thereof

  • US 5,315,789 A
  • Filed: 10/02/1991
  • Issued: 05/31/1994
  • Est. Priority Date: 08/24/1987
  • Status: Expired due to Term
First Claim
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1. A numerically controlled machine tool for grinding a workpiece into a desired shape by rotating the workpiece about its own axis at a prescribed speed, and moving a grinding tool in radial and axial directions of the workpiece, said machine tool comprising:

  • first drive means for moving the grinding tool in the radial direction of the workpiece;

    second drive means for moving the grinding tool in the axial direction of the workpiece;

    input means for inputting roll shape data, wherein said roll shape data includes (i) a roll number for identifying said roll shape data;

    (ii) a roll shape composed of a plurality of parameter curves; and

    (iii) parameters for said curves;

    point group data calculating means for calculating point group data for said curves according to prescribed formulas;

    memory means for storing said roll shape data for a plurality of desired shapes and their corresponding point group data;

    control means, responsive to a selection of a desired shape for controlling the operation of said first and second drive means in accordance with said point group data of said selected desire shape to grind the workpiece to the desired shape.

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