1.Department of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411101,China;
2.Hunan Province Cooperative Innovation Center for Wind power Equipment and Energy Conversion,Xiangtan 411101,China;
3. State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;
4.College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China
Abstract:Aiming at high speed turn-milling by end mill,the theoretical model in stability range of three-dimensional dither was established on the basis of its cutting principle by using an analytic method. Based on modal test of 4-axial turn-milling by end mill,the leaf figure of the dither stability range was simulated and analyzed. The results show that: the geometrical shape of mill,material of work-piece,rotating speed of mill,cutting depth and the frequency response function of machine-tool’s structure are closely related to the conditions that can produce dither in high speed turn-milling by end mill. In the test of stability range of dither in turn-milling,the results of spectrum analysis for cutting force show that: cutting is stable and non-dither when cutting-in frequency of cutter tooth plays the leading role in force spectrum. Dither is produced when modal frequency of the system plays the leading role in force spectrum. The measured value of cutting force and surface roughness are also higher than those in the condition of non-dither. Thus the theoretical model and results of simulation can provide theoretical guidance for processing efficiency and surface quality of work-piece manufactured by end mills.
关跃奇1,魏克湘1,2,张文明3,关汗青4. 高速车铣加工三维颤振的稳定性分析与试验研究[J]. 振动与冲击, 2017, 36(4): 192-197.
GUAN Yueqi1,WEI Kexiang1,2,ZHANG Wenming3,GUAN Hanqing4. Stability analysis and experimental research for three-dimensional dither in processing of high speed milling. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(4): 192-197.
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