Local corner smoothing of linear toolpath based on B-spline fitting and its piecewise interpolation

Line segment toolpaths are commonly utilized in machining of complex parts with curved surfaces. However, the first-order discontinuity of the linear toolpath results in frequent variation of the feedrate, which is bad to the machining quality. To smooth the sharp corners of linear toolpath thus avo...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-11, Vol.1678 (1), p.12017
Main Authors: Song, Dening, Zhou, Chao, Zhong, Yuguang, Yao, Jianjun, Ma, Jianwei
Format: Article
Language:English
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Summary:Line segment toolpaths are commonly utilized in machining of complex parts with curved surfaces. However, the first-order discontinuity of the linear toolpath results in frequent variation of the feedrate, which is bad to the machining quality. To smooth the sharp corners of linear toolpath thus avoiding above problem, this paper presents a local corner smoothing approach. Compared with existing methods, the smoothed toolpath using the proposed the is one integral B-spline, instead of alternative straight-line segments and spline segments, which make the continuity more easily to ensured. Additionally, the integral long B-spline is interpolated through a piecewise feedrate scheduling method, thus the computational burden can be released. Effectiveness of the presented method in corner smoothing and kinematic constraining is demonstrated by illustration test.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1678/1/012017