Prediction of part machining cycle times via virtual CNC

This paper presents the virtual prediction of part machining cycle times within 95% accuracy by considering the trajectory generation and corner smoothing models of commercial CNCs. The key functions of the CNC which control the machine motions are the real time interpolation, trajectory generation...

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Bibliographic Details
Published in:CIRP annals 2015, Vol.64 (1), p.361-364
Main Authors: Altintas, Y., Tulsyan, S.
Format: Article
Language:English
Subjects:
Computer numerical control (CNC)
Cycle time
Tool path
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Summary:This paper presents the virtual prediction of part machining cycle times within 95% accuracy by considering the trajectory generation and corner smoothing models of commercial CNCs. The key functions of the CNC which control the machine motions are the real time interpolation, trajectory generation and feed drive control modules. It is shown that only the trajectory generation and the interpolation of tool path geometry are crucial in predicting the part machining cycle times, and the servo control loops contribute negligible time delay. The proposed model is experimentally validated in machining 3 and 5-axis parts on commercial CNC machine tools.
ISSN:0007-8506
DOI:10.1016/j.cirp.2015.04.100