微尺度铣刀刃在加工过程中的动态分析
首发时间:2013-03-15
摘要:随着信息时代的发展,微加工技术已逐渐成为研究热点,尤其是微尺度铣削加工中的颤振的预防。针对微尺度铣削实际情况,首先进行动态理论研究,深入分析傅里叶法和平均齿角法两种方法,比较两者优缺点,确定傅里叶分析法接近实际加工要求,经频域法获得分析颤振的叶瓣图,着重分析在稳定区和非稳定区内选择微铣削参数对进行了试验研究,分析稳定和非稳定曲线和加工零件的表面质量,获得在高主轴转速内的颤振点、非颤振点和不确定点基本与理论分析相符,而在低速主轴转速三者的分布情况与理论太一致,究其原因是在微尺度铣削过程中发生了颤振阻尼效应。研究微尺度铣削颤振,对提高零件的加工零件的精度,减少微铣削刀刃磨损,延长微刀具寿命等都具一定的指导意义。
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The dynamic analysis of microscale edge in the process of micromilling
Abstract: The micro-processing technology has gradually become a hot topic problem, especially in microscale milling chatter prevention with the development of the information age. In allusion to the actual case of micromilling, the dynamic theoretical research of microscale milling are analyzed in-depth about the Fourier method and the average tooth angle method. Compared to two ways,the former is close to the actual processing requirements. The lobes are obtained use the two ways. Micro milling parameters are selected in the stable area and unstable region.Stable and non-stable curve and surface quality of machined parts are obtained after micro-milling test.The chatter points ,non-chatter point and uncertain point are obtained in the high spindle speed,which are consistent with theoretical analysis. In contrast,the distributionin of chatter points in the low-speed spindle speed. The reason is that the damping effect are produced in the microscale milling process.The research of microscale milling chatter, which has a certain significance to improve parts of precision machined parts,reduce the wear and tear of the micro-milling blade and extend micro-tool life.
Keywords: Micro chatter Lobe diagram Spindle speed Axial cutting depth Damping effect
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