Bi-rotary milling head is one of the core components of five-axis machining center and its dynamic characteristics directly affect the machining stability and accuracy. During the five-axis machining, the milling head would change the posture continuously. To facilitate rapid evaluation and optimization of the dynamic behavior of the bi-rotary milling head within the whole workspace, a multi-rigid-body dynamic model considering the flexible joint is established. The varying stiffness of the flexible joints affected by gravity and cutting force at different swing angles is analyzed. A parametric dynamic equation with posture parameters and physical parameters is finally deduced. The sensitive structural parameters on natural frequency and its fluctuation within the workspace are obtained by the sensitivity analysis. The theoretical and experimental results show that the dynamics of the bi-rotary milling head behave pose-dependent and the varying dynamics can be positive controlled by modifying sensitive structural parameters at the design stage.
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ASME 2016 11th International Manufacturing Science and Engineering Conference
June 27–July 1, 2016
Blacksburg, Virginia, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4990-3
PROCEEDINGS PAPER
Pose-Dependent Dynamic Modeling and Analysis of Bi-Rotary Milling Head
Jun Zhang,
Jun Zhang
Xi’an Jiaotong University, Xi’an, China
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Huijie Zhang,
Huijie Zhang
Xi’an Jiaotong University, Xi’an, China
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Wanhua Zhao
Wanhua Zhao
Xi’an Jiaotong University, Xi’an, China
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Chao Du
Xi’an Jiaotong University, Xi’an, China
Dun Lu
Xi’an Jiaotong University, Xi’an, China
Jun Zhang
Xi’an Jiaotong University, Xi’an, China
Huijie Zhang
Xi’an Jiaotong University, Xi’an, China
Wanhua Zhao
Xi’an Jiaotong University, Xi’an, China
Paper No:
MSEC2016-8862, V002T04A039; 7 pages
Published Online:
September 27, 2016
Citation
Du, C, Lu, D, Zhang, J, Zhang, H, & Zhao, W. "Pose-Dependent Dynamic Modeling and Analysis of Bi-Rotary Milling Head." Proceedings of the ASME 2016 11th International Manufacturing Science and Engineering Conference. Volume 2: Materials; Biomanufacturing; Properties, Applications and Systems; Sustainable Manufacturing. Blacksburg, Virginia, USA. June 27–July 1, 2016. V002T04A039. ASME. https://doi.org/10.1115/MSEC2016-8862
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