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Machine tool for machining a workpiece by feeding a cutting tool in a series of discrete steps and related method

  • US 4,704,689 A
  • Filed: 08/27/1985
  • Issued: 11/03/1987
  • Est. Priority Date: 08/27/1984
  • Status: Expired due to Term
First Claim
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1. A machine tool for machining a workpiece by feeding a cutting tool into said workpiece in a series of discrete steps, said machine tool comprising:

  • (a) data storage means for storing a constant value for each of said steps;

    (b) calculating means, responsive to the value of a variable factor independently derived of said constant value and affecting operation of said cutting tool, for calculating for each of said discrete steps an infeed distance as a function of said corresponding constant value for that step said value of said variable factor; and

    (c) control means for feeding said cutting tool into said workpiece as a function of the infeed distances for a plurality of said and, upon completion of feeding for one step, at least partially withdrawing said cutting tool and subsequently feeding said cutting tool into said workpiece as a function of said infeed distance for the next step.

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