An adaptive real-time NURBS curve interpolation for 4-axis polishing machine tool. (February 2021)

• Record Type: Journal Article
• Authors: Ji, Shijun; Lei, Lianggen; Zhao, Ji; Lu, Xiuquan; Gao, Hong
• Is Part Of: Robotics and computer-integrated manufacturing. Volume 67(2021)
• Publication Date: 2021-02
• Subjects: CNC -- NURBS Interpolation -- Acceleration/Deceleration (ACC/DEC) Control -- Simulation; Robots, Industrial -- Periodicals; Computer integrated manufacturing systems -- Periodicals; Robotics -- Periodicals; Robots industriels -- Périodiques; Productique -- Périodiques; Robotique -- Périodiques; 670.285
• DOI: 10.1016/j.rcim.2020.102025
• Languages: English
• ISSNs: 0736-5845

Abstract

Highlights: An adaptive real-time NURBS curve interpolation is proposed for 4-axis polishing machine tool. The proposedreal-time NURBS curve interpolation can improve the machining performance and eliminates the machining shock caused by the undesired ACC/DEC profile. Aflexible S-shaped curve acceleration/deceleration (ACC/DEC) control method is added to the interpolation algorithms. The NURBS curve interpolation experiments performed on the 4-axis polishing machine tool demonstrate the validity and correctness of the adaptive real-time NURBS curve interpolation algorithm in the CNC system. Abstract: The non-uniform rational B-spine (NURBS) curve interpolation is a key technology of the advanced computer numerical control (CNC) system. NURBS curve interpolation can realize a high-speed and high-precision machining, and it can also avoid some inevitable deficiencies of the linear and circular interpolation functions which are generally used in traditional NC system. Before the interpolation, some calculation tasks are finished, which will decrease the amount of calculation during interpolation and increase the interpolation efficiency. Further, an adaptive NURBS curve interpolation with real-time and flexible S-shaped curve acceleration/deceleration (ACC/DEC) control method is added to the interpolation algorithms. The NC machining simulation conducted with the MATLAB software and the NURBS curve interpolation experiments performed on the 4-axis polishing machine tool demonstrate the validity and correctness of the adaptive real-time NURBS curve interpolation algorithm in the CNC system.