Post-processing Algorithm of a Novel Five-axis Hybrid Kinematic Machining Unit

被引：0
|
作者：
Zhang J. [1 ]
Bao Y. [1 ]
Fang H. [1 ]
Song Y. [1 ]
机构：
[1] School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2023年 / 59卷 / 01期
关键词：
hybrid kinematic machining unit; inverse kinematics; S-shape workpiece; smoothing processing; velocity allocation;
D O I：
10.3901/JME.2023.01.298
中图分类号：
学科分类号：
摘要：
Due to the merits of high stiffness, quick dynamic response and flexible posture adjustment, 5-axis hybrid machine units have been regarded as an alternative solution for high-efficiency machining of aluminum alloy structural components with complex geometries. Post-processing is of great importance to the improvement of machine capacity of hybrid machine units. A post-processing algorithm is proposed to improve the surface quality of the workpieces for a novel hybrid kinematic machining unit. Firstly, by adopting the B-spline curve, a double parameter curve interpolation algorithm is formulated to smooth the tool tip and tool axis trajectory. And then, the parameter synchronization is used to ensure the synchronous interpolation of tool tip and tool axis. Secondly, the velocity mapping model of the hybrid kinematic machining unit is formulated and a velocity allocation algorithm is proposed to ensure the stability of tool tip velocity. Thirdly, by using the inverse kinematics and the velocity allocation algorithm, the feedrate, the tool tips and the tool axis vectors are converted into a set of motion control points of the servo motors. Based on this, the post-processing of tool-path is realized for the hybrid kinematic machining unit. Finally, based on a laboratory prototype of the hybrid kinematic machining unit, a set of machining tests on S-shape workpiece is carried out to verify the effectiveness of the proposed post-processing algorithm. © 2023 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：298 / 308
页数：10
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