Local corner smoothing of linear toolpath based on B-spline fitting and its piecewise interpolation. (November 2020)

• Record Type: Journal Article
• Authors: Song, Dening; Zhou, Chao; Zhong, Yuguang; Yao, Jianjun; Ma, Jianwei
• Is Part Of: Journal of physics. Volume 1678(2020)
• Publication Date: 2020-11
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1678/1/012017
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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.