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Method and machine for grinding rotationally symmetrical workpieces

  • US 4,630,403 A
  • Filed: 10/02/1985
  • Issued: 12/23/1986
  • Est. Priority Date: 10/11/1984
  • Status: Expired due to Fees
First Claim
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1. A method of removing material from axially spaced-apart first and second portions of rotary workpieces which are symmetrical with reference to their axes of rotation, such as the reciprocatory elements of lift valves, comprising the steps of clamping a third portion of a workpiece;

  • maintaining the thus clamped workpiece in a first predetermined position;

    grinding the first portion of the workpiece in such first position by a grinding tool;

    monitoring the dimensions of the ground first portion and generating and memorizing signals denoting the monitored dimensions;

    inverting the workpiece and maintaining the inverted workpiece in a second predetermined position without interrupting the clamping step; and

    grinding the second portion of the inverted workpiece by said grinding tool, including effecting a relative movement of the inverted workpiece and the the grinding tool as a function of the memorized signals.

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