Automation of Postprocessors to Increase Productivity

  • K. G. Adams
  • D. French


To obtain maximum productivity from an N/C machine, selection of the most economic feeds and speeds which will ensure the required surface finish of the product is mandatory. To relieve the programmer of this task, an automated postprocessor was developed. The postprocessor vocabulary structure and implementation presented illustrates a method by which the programmer can specify the desired type of material, cutter, surface finish and the economic parameters required to generate the optimum cutting conditions. Since the postprocessor calculates tool wear, programming options allow the generation of automatic tool changes to insert new tools where conditions warrant. A summary of tools, cutting parameters and costs is printed out when postprocessing is completed, including the percentage of tool life still available on each tool which permits tool replacement schedules and total tool requirements to be predetermined.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    OPITZ ET AL. (1970) The basis of cutting calculations in EXAPT, Numerical Control User’s Handbook, McGraw-Hill, pp. 393–424 Google Scholar
  2. 2.
    K. ADAMS and C. BOER (1976) Tool Life and Surface Finish Relationships for Milling Aluminum Alloy, Proceedings of the Fourth North American Metalworking Research Conference, pp. 339–345 Google Scholar
  3. 3.
    C. BOER (1975) Automatic Selection of Optimum Cutting Parameters With Surface Finish Constraints for a Numerically Controlled Milling Machine”, M.A.Sc. thesis, Mechanical Engineering Department, University of Waterloo, May, 1975 Google Scholar
  4. 4.
    System/360 APT Numerical Control Processor(360A-CN-10x) Version 4 System Manual Google Scholar
  5. 5.
    APT Postprocessor Standards, IIT Research Institute, September 1963 Google Scholar

Copyright information

© Department of Mechanical Engineering University of Manchester Institute of Science and Technology 1983

Authors and Affiliations

  • K. G. Adams
    • 1
  • D. French
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of WaterlooBelgium

Personalised recommendations