Multi-axis Loading Device for Reliability Tests of CNC Machine Tools

被引：1
|
作者：
Liu H. [1 ]
Fan R. [1 ]
Guo J. [1 ]
Zhang W. [2 ]
Zhao Q. [2 ]
Chen W. [1 ]
机构：
[1] School of Mechanical Engineering and Automation, Beihang University, Beijing
[2] China National Machine Tool Quality Supervision Testing Center, Beijing
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2020年 / 31卷 / 13期
关键词：
CNC machine tool; Load-while-track; Multi-axis loading; Parallel mechanism; Reliability;
D O I：
10.3969/j.issn.1004-132X.2020.13.013
中图分类号：
学科分类号：
摘要：
A multi-axis loading device with load-while-track capacity was proposed to generate multi-axis feeding resistance for the reliability test of CNC machine tools. This provided the research foundation to simulate complex cutting forces in real machining processes. The loading device was developed by a 6-PUS parallel mechanism. Based on a fuzzy PID controller, an explicit force control system was established, which could adaptively adjust the proportional and integral gains according to loading errors. Multi-axis loading experiments were conducted on a real five-axis CNC machine tool. Results show that the loading device may track the uniaxial, three-axis and five-axis feeding motion of the spindle and simultaneously apply three-axis forces to the spindle; the maximum loading error is less than 3.2%. This illustrates that the device may effectively generate multi-axis feeding resistance to the spindle that is performing various feeding trajectories. Research fruits may supply the theoretical support and equipment to the future work on simulating cutting forces by dynamic loading. The loading device provides a new loading method for the reliability test of machine tools, and assists large-scale development and standardization of the test. Besides the reliability test, the loading device may also be utilized in other performance evaluations of machine tools, such as accuracy retainability, overload, and run-in test. © 2020, China Mechanical Engineering Magazine Office. All right reserved.
引用
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页码：1606 / 1612
页数：6
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