期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 131, 期 -, 页码 261-287出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2019.05.058
关键词
Five-axis machining; Ball-end milling; Tool-workpiece interactions; Stability prediction; Structural mode coupling; Process damping
资金
- National Natural Science Foundation of China [51375055, 51575055]
- High-end CNC machine tools and basic manufacturing equipment Science and Technology Major Project of China [2015ZX04001002]
In five-axis ball-end machining, stability of the milling process is not only determined by the combination of depth of cut and the spindle speed, but also determined by the lead and tilt angles of the milling tool (i.e., the tool orientations). As the degree of freedom increases, five-axis machining machines have more complex dynamic characteristics. Therefore, the influence of the tool-workpiece interactions on the machining performance is more obvious. In this paper, a new five-axis ball-end milling dynamical model which considers the multiple interactions between the tool and workpiece is established for the first time. Based on the established dynamical model, the effects of regenerative effect, structural mode coupling and process damping on the dynamic characteristics of five-axis milling are investigated. In addition, the effects of lead angle and tilt angle on the stability prediction of five-axis milling are investigated. The experimental results show that the proposed five-axis milling dynamical model is more reliable than the traditional one in predicting the stability of five-axis milling. (C) 2019 Elsevier Ltd. All rights reserved.
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