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Optimized NURBS Based G-Code Part Program for High-Speed CNC Machining

[+] Author Affiliations
Sai Ashish Kanna, Andres Tovar, Hazim El-Mounayri

Indiana University-Purdue University Indianapolis, Indianapolis, IN

Jason Soungjin Wou

Bishop Steering Technology, Inc., Indianapolis, IN

Paper No. DETC2014-34884, pp. V004T06A039; 6 pages
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 19th Design for Manufacturing and the Life Cycle Conference; 8th International Conference on Micro- and Nanosystems
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4635-3
  • Copyright © 2014 by ASME


This work presents the automation of high-accuracy CNC tool trajectory planning from CAD to G-code generation through optimal NURBs surface approximation. The proposed optimization method finds the minimum number of NURBS control points for a given admissible theoretical cord error between the desired and manufactured surfaces. The result is a compact part program that is less sensitive to data starvation than circular and spline interpolations with potential better surface finish. The proposed approach is demonstrated with the tool path generation of an involute gear profile.

Copyright © 2014 by ASME



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