薄肋高速空切的颤振实验研究  

An Experimental Study of Chatter Caused By High Speed Empty-Cutting of Thin Rib

作　　者：许冬梅[1] 许进忠[2] 

机构地区：[1]福建信息职业技术学院,福建福州350003 [2]高雄应用科技大学

出　　处：《图学学报》2013年第3期111-114,共4页Journal of Graphics

摘　　要：薄肋在高速空切时产生的颤振将影响零件加工质量、表面粗糙度和刀具寿命,为了克服此影响,对薄肋空切时,在不受外力直接激振的情况下的薄肋振幅变化进行分析;运用有限元方法和田口实验法对薄肋进行仿真实验和动态位移激振研究,得出结论:薄肋的宽、高、厚度尺寸会直接影响薄肋位移量,当高度一定时,宽度增加位移量会减少;当宽度与高度一定时,随着厚度的减少,其位移量会变大;当宽度与厚度一定时,随着高度的增加,其位移量亦会变大。探讨了薄肋动态位移内部能量的变化状态,并获得其能量完全衰减的时间,进而设计其加工路径以避开颤振。The processing quality of accessories, coarseness of their surface, and service life of cutting tools are affected by chatter caused by high speed empty-cutting of thin rib. In order to overcome those influences, the dynamics of thin rib amplitude was analyzed without direct exciting vibration from external force during empty-cutting, then finite element method and Taguchi experiment were applied to conduct simulation experiment and dynamic displacement exciting vibration on the thin rib. It was proved that the width, height and thickness of thin rib directly affected its displacement. The displacement of thin rib was decreased with increase of its width at a certain height, while increased with decrease of its thickness at a certain width and height. Meanwhile the displacement of thin rib was increased with increase of its height at a certain width and thickness. Furthermore, the dynamics of energy in the thin rib during its dynamic displacement was explored, and the time for complete attenuation of its energy was obtained. Accordingly the processing path of thin rib was designed to avoid chatter.

关 键 词：薄肋 高速空切 颤振 

分 类 号：TG506.1[金属学及工艺—金属切削加工及机床]