Look-Ahead Algorithm with Whole S-Curve Acceleration and Deceleration

Tool paths of a complex contour machining generated by commercial CAD/CAM systems are mainly composed of many short linear/circular blocks. Though the look-ahead algorithms can improve speed and accuracy in the machining of short linear/circular segments, most of them just deal with linear segments...

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Bibliographic Details
Published in:Advances in Mechanical Engineering 2013, Vol.2013 (2013), p.1-9
Main Authors: Youdong, Chen, Ji, Xudong, Yong, Tao, Wei, Hongxing
Format: Article
Language:English
Subjects:
Acceleration
Algorithms
Computer aided manufacturing
Computer simulation
Deceleration
Efficiency
Machining
Numerical controls
Segments
Studies
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Summary:Tool paths of a complex contour machining generated by commercial CAD/CAM systems are mainly composed of many short linear/circular blocks. Though the look-ahead algorithms can improve speed and accuracy in the machining of short linear/circular segments, most of them just deal with linear segments with trapezoid acceleration and deceleration (acc/dec). In addition, the look-ahead algorithms with S-curve acc/dec are too complex to adopt the equivalent S-curve profile by approximation algorithm. To increase the smoothness of feedrate profile and machining efficiency of continuous short line and circle machining, this paper presents a feedrate profile generation approach and corresponding look-ahead algorithm with whole S-curve acc/dec. With the proposed look-ahead scheme, the feedrate profiles with S-curve acc/dec can work efficiently in a lot of short line and circle segments. Thus, the machining productivity can be increased and the feedrate profiles are smooth. The simulation and experiments verify the feasibility and validity of the proposed approach.
ISSN:1687-8132
1687-8140
1687-8132
DOI:10.1155/2013/974152