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Feed control apparatus for grinding machine

  • US 4,615,149 A
  • Filed: 05/22/1985
  • Issued: 10/07/1986
  • Est. Priority Date: 05/23/1984
  • Status: Expired due to Term
First Claim
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1. A numerically controlled grinding machine including a bed, a work table slidably mounted on said bed in a first axis direction for supporting thereon a workpiece and rotating it about the first axis, a wheel head slidably mounted on said bed in a second axis direction perpendicular to the first axis, a grinding wheel rotatably mounted on said wheel head and having a first grinding surface arranged in parallel with the first axis for grinding a cylindrical portion of said workpiece and a second grinding surface arranged in parallel with the second axis for grinding a shoulder portion of said workpiece adjacent to the cylindrical portion, first and second feed mechanisms for moving said work table and said wheel head respectively in the first and second axis directions, and a numerical control apparatus for activating both said feed mechanisms on a basis of numerical control data and for effecting simultaneous movements of said work table and said wheel head to move said grinding wheel along a path extending across the first axis at an acute angle,wherein said numerical control apparatus comprises:

  • memory means for storing said numerical control data, an instruction for effecting the simultaneous movements of said work table and said wheel head, and command data indicative of a movement amount of said wheel head in the second axis direction;

    means for reading out the stored instruction and command data;

    computation means responsive to the read out instruction for calculating a movement amount of said work table in the first axis direction on a basis of the read out command data so as to enable said grinding wheel to move along said path and for producing first and second output signals respectively indicative of the movement amount of said wheel head and the calculated movement amount of said work table; and

    means responsive to the output signals of said computation means for activating said feed mechanisms to effect the simultaneous movements of said work table and said wheel head.

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