期刊
CHINESE JOURNAL OF AERONAUTICS
卷 28, 期 6, 页码 1766-1773出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2015.06.001
关键词
Aero-engine casings; Bull-nose end mill; Chatter; Four-axis milling; Stability lobe diagram
资金
- National Basic Research Program of China [2013CB035802]
- 111 Project of China [B13044]
An analytical model for chatter stability prediction in bull-nose end milling of aero-engine casings is presented in this paper. And the mechanics and dynamics variations due to the complex cutter and workpiece geometry are considered by analyzing the effects of the lead angle on the milling process. Firstly, the tool-workpiece engagement region is obtained by using a previously developed method and divided into several disk elements along the tool-axis direction. Secondly, a 3D dynamic model for stability limit calculation is developed and simplified into a 1D model in normal direction considering only the dominant mode of the workpiece. Then the cutting force coefficients, the start and exit angles corresponding to each disk element are determined. And the total stability lobe diagram is calculated using an iterative algorithm. Finally, several experimental tests are carried out to validate the feasibility and effectiveness of the proposed prediction approach. (C) 2015 The Authors. Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.
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