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research-article

A method of generating spiral tool path for direct 3-axis CNC machining of measured cloud of point

[+] Author and Article Information
Jinting Xu

No.2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province Dalian, China Dalian, Select State/Province 116024 China xujt@dlut.edu.cn

Longkun Xu

No. 2 Linggong Road Dalian, Liaoning 116024 China xulongkun@mail.dlut.edu.cn

Yuwen Sun

No. 2 Linggong Road Dalian City, Liaoning 116024 China xiands@dlut.edu.cn

Yuan-Shin Lee

NCSU Box 7906 Department of Industrial and Systems Engineering Raleigh, NC 27695 yslee@ncsu.edu

Jibin Zhao

No. 114 Nantan Street Shenyang, Liaoning 110016 China jbzhao@sia.cn

1Corresponding author.

Manuscript received January 28, 2019; final manuscript received April 8, 2019; published online xx xx, xxxx. Assoc. Editor: Charlie C.L. Wang.

ASME doi:10.1115/1.4043532 History: Received January 28, 2019; Accepted April 09, 2019

Abstract

Smooth continuous spiral tool paths are preferable for computer numerical control (CNC) machining due to its good kinematics and dynamics characteristics. This paper presents a new method to generate spiral tool paths for direct 3-axis CNC machining of measured cloud of point. In the proposed method, inspired by Archimedean spiral passing through the radial lines in a circle, 3D radial curves on the cloud of point are introduced, and how to construct the radial curves on the complex cloud of point is discussed in detail and then a practical and effective radial curve construction method of integrating boundary extraction, region triangulation, mesh mapping and point projection is proposed. On the basis of the radial curves, the spiral tool path can be generated nicely by interpolating the radial curves using a spiral curve. Besides, the method of identifying and eliminating the overcuts and undercuts in the spiral tool path resulting from the interpolation error are also presented for good surface quality. Finally, several examples are given to validate the proposed method and shows its potential in practical applications when the quality parametric models and mesh models is not available.

Copyright © 2019 by ASME
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