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Considering Machining Tolerances in High Speed Corner Tracking

[+] Author Affiliations
Sepehr Zarifmansour, Rudolf Seethaler

University of British Columbia, Kelowna, BC, Canada

Paper No. DETC2015-46047, pp. V009T07A060; 7 pages
doi:10.1115/DETC2015-46047
From:
  • ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 9: 2015 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications
  • Boston, Massachusetts, USA, August 2–5, 2015
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5719-9
  • Copyright © 2015 by ASME

abstract

Growing industrial demand for faster machine tools, makes feed-rate and trajectory optimization a challenging problem in machining processes. One of the most challenging machining operations for computer numerically controlled (CNC) machine tools is corner tracking. In this scenario, most of the conventional feed-rate optimization approaches sacrifice speed for accuracy. This paper, proposes a new feed-rate and trajectory optimization algorithm for CNC machines. At each corner of the trajectory, the presented algorithm regenerates the trajectory, using a circular move within a desired tolerance limit. Then, a new feed rate optimization method is employed, which enables the machine tool to travel at the maximum feasible velocity through the corners, while taking acceleration constraints into account. Experimental results for different desired tolerances indicate that the new algorithm achieves significantly shorter travel times than the theoretical minimum time trajectory with zero tolerance.

Copyright © 2015 by ASME

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