摘要
微型铣刀在微铣削加工中由于悬伸量的不同会导致刀具寿命和加工表面质量存在明显差异。主要是由于不同悬伸量导致微型铣刀的振动模态和频率分布是不同的。为了研究悬伸量对微型铣刀振动模态和频率分布的影响规律,对不同悬伸量微型铣刀的固有频率、振型及变化规律进行了研究。利用ANSYS建立了微铣刀有限元模型,采用自由网格划分,通过合理地设置网格划分的疏密程度,确保有限元模型的合理性。分析了四种不同悬伸量微型铣刀的前6阶固有频率和模态振型。所作研究可为切削速度的选择提供参考。
Obvious differences may occur in tool life and machined surface quality when micro-milling cutter use different extended lengths in micro milling process.It is mainly known as that the different extended length can lead to distinct vibration＇s model and frequencies distribution.In order to learn about the rule that how extended length affect the vibration＇s model and frequencies distribution of the cutter,this paper conducts an experiment which to study the inherent frequency,vibration＇ s model and change rule under various extended lengths.ANSYS is used to establish the micro-cutter＇s finite element model,and free meshing is adopted to finish the model meshing.meshing density is set reasonable to ensure the reliability of the model.During this research,four different extended lengths＇inherent frequency and modal shape of the first six ranks have been analyzed and the result can make a reference for the choice of cutting speed.
出处
《组合机床与自动化加工技术》
北大核心
2013年第12期112-114,共3页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51305061)
高等学校博士学科点专项科研基金(20120041120034)
中央高校基本科研业务费专项资金资助(DUT13LAB13)
关键词
微型铣刀
模态分析
有限元法
悬伸量
micro milling cutter
modal analysis
finite element method
extended length
