A theoretical and experimental investigation into multimode tool vibration with surface generation in ultra-precision diamond turning |
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| Affiliation: | 1. Research Institute of Mechanical Manufacturing Engineering, School of Mechatronics Engineering, Nanchang University, Nanchang, Jiangxi, China;2. State Key Laboratory in Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;3. Shenzhen Research Institute of The Hong Kong Polytechnic University, Shenzhen, Guangdong, China;1. School of Mechatronics Engineering, Harbin Institute of Technology, China;2. Key Laboratory of E&M, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, China;1. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China;2. EPSRC Future Metrology Hub, School of Computing and Engineering, University of Huddersfield, United Kingdom;3. School of Engineering, University of Warwick, United Kingdom;1. Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin, 30054, China;2. State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China;3. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, 300384, China;4. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, China;1. Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;3. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China;4. Interdisciplinary Centre for Advanced Materials Simulation, Ruhr-University Bochum, Bochum, 44780, Germany;1. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, 310027, PR China;2. State Key Laboratory of Precision Measuring Technology and Instruments, Centre of MicroNano Manufacturing Technology, Tianjin University, 300072, PR China;3. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, J.S., 210094, PR China |
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| Abstract: | In ultra-precision diamond turning (UPDT), tool's high frequency vibration is natural mechanism influencing nanometric surface roughness of machined components. Its first mode high frequency vibration has been overemphasized. However, its multimode high frequency vibration (MHFTV) has not been reported. In the paper, the MHFTV and its effects on surface generation in UPDT are firstly studied. The experimental and theoretical results verify that (i) diamond tool naturally possesses multimode high frequencies, i.e. one sub-high frequency (SHF) for the tool shank tip, one high frequency (HF) for the tool tip, and one ultrahigh frequency (UHF) for the diamond tip; (ii) dampers cause the variation of tool's multimode high frequencies, under which the MHFTV together produces non-uniform zebra-stripe-like patterns at a machined surface; and (iii) cutting force has a linear relationship with and tool's stiffness has a reverse proportion to the amplitude of the MHFTV to influence surface generation, which can be used to improve surface quality. |
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| Keywords: | High frequency Surface generation Multimode tool vibration Ultra-precision diamond turning |
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