| Chatter stability and precision during high-speed ultrasonic vibration cutting of a thin-walled titanium cylinderChatter stability and precision during high-speed ultrasonic vibration cutting of a thin-walled titanium cylinder |
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| 作者姓名： | Zhenlong PENG Deyuan ZHANG Xiangyu ZHANG |
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| 作者单位： | 1. School of Mechanical Engineering and Automation, Beihang University;2. Institute of Bionic and Micro-Nano Systems, Beihang University;3. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University |
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| 摘 要： | Titanium alloys are widely used in the aviation and aerospace industries due to their unique mechanical and physical properties. Specifically, thin-walled titanium(Ti) cylinders have received increasing attention for their applications as rocket engine casings, aircraft landing gear,and aero-engine hollow shaft due to their observed improvement in the thrust-to-weight ratio.However, the conventional cutting(CC) process is not appropriate for thin-walled Ti cylinders due to its low thermal conduc...
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| 收稿时间： | 30 October 2019 |
Chatter stability and precision during high-speed ultrasonic vibration cutting of a thin-walled titanium cylinder |
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| Zhenlong PENG,Deyuan ZHANG,Xiangyu ZHANG.Chatter stability and precision during high-speed ultrasonic vibration cutting of a thin-walled titanium cylinderChatter stability and precision during high-speed ultrasonic vibration cutting of a thin-walled titanium cylinder[J].Chinese Journal of Aeronautics,2020,33(12):3535-3549. |
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| Institution: | 1. School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China;2. Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing 100083, China;3. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China |
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| Abstract: | Titanium alloys are widely used in the aviation and aerospace industries due to their unique mechanical and physical properties. Specifically, thin-walled titanium (Ti) cylinders have received increasing attention for their applications as rocket engine casings, aircraft landing gear, and aero-engine hollow shaft due to their observed improvement in the thrust-to-weight ratio. However, the conventional cutting (CC) process is not appropriate for thin-walled Ti cylinders due to its low thermal conductivity, high strength, and low stiffness. Instead, high-speed ultrasonic vibration cutting (HUVC) assisted processing has recently proved highly effective for Ti-alloy machining. In this study, HUVC technology is employed to perform external turning of a thin-walled Ti cylinder, which represents a new application of HUVC. First, the kinematics, tool path, and dynamic cutting thickness of HUVC are evaluated. Second, the phenomenon of mode-coupling chatter is analyzed to determine the effects and mechanism of HUVC by establishing a critical cutting thickness model. HUVC can increase the critical cutting thickness and effectively reduce the average cutting force, thus reducing the energy intake of the system. Finally, comparison experiments are conducted between HUVC and CC processes. The results indicate that the diameter error rate is 10% or less for HUVC and 51% for the CC method due to a 40% reduction in the cutting force. In addition, higher machining precision and better surface roughness are achieved during thin-walled Ti cylinder manufacturing using HUVC. |
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| Keywords: | High-speed machining Minimum chip thickness Mode-coupling Thin-walled cylinder Ultrasonic vibration cutting |
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