期刊
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
卷 106, 期 -, 页码 89-97出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijmachtools.2016.04.007
关键词
5 axis; Ball end milling; Chatter stability; Tool orientation; Optimization
资金
- National research and Engineering Science Council of Canada (NSERC) [11R86164]
- National Natural Science Foundation of China [51475302]
- Shanghai Municipal Commission of Economy and Informatization Project [RX-RJJC-02-15-9242]
Dies, molds and parts with complex free form surfaces are usually machined with ball end mills on 5-axis CNC machining centers. This paper presents automatic adjustment of tool axis orientations to avoid chatter along the tool path. The process mechanics and dynamics of ball end milling are modeled in cutter-workpiece engagement coordinate system. The structural dynamics of tool and workpiece are transformed to cutter-workpiece engagement coordinates by considering the tool path and the kinematics of the machine tool. The stability of the 5-axis ball end milling is modeled at each tool path location, and the chatter free tool axis orientations are searched iteratively using Nyquist criterion while avoiding gouging limits. The tool path, i.e. cutter location (CL) file, is updated to generate chatter free, 5-axis ball end milling of the parts. The proposed algorithm has been experimentally proven in 5-axis ball end milling tests. (C) 2016 Elsevier Ltd. All rights reserved.
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