摘要
采用分子动力学模拟方法进行了金属钛的纳米振动切削和普通纳米切削的比较研究。结果表明:在相同仿真条件下,单向振动X、Y向切削力平均值仅为普通切削的1/3左右;椭圆振动切削(elliptical vibration cutting,EVC)相比单向振动切削,剪切角变大,切屑的塑性变形降低,同时主切削力以及背吃刀力值均降低;单向振动切削和EVC的切削温度呈近似正弦脉冲变化,对比普通加工,振动切削的温度显著下降;相比于单向振动切削EVC的工件平均切削温度略高。
The molecular dynamics （MD） simulation method is used for comparative study of titanium nano-vibra- tion cutting and common cutting. In the same simulation conditions, the average cutting force of unidirectional vi- bration in X, Y direction is only about 1/3 of common cutting force. Compared with unidirectional vibration cut- ting, the elliptical vibration cutting （EVC） shear angle increases and the plastic deformation of cutting chip is re- duced, at the same time the values of principal cutting force and thrust force are reduced. The cutting temperature change of EVC and unidirectional vibration cutting is following approximate sinusoidal pulse. Compared with corn- mon cutting, the temperature of vibration cutting piece in the EVC process is slightly higher than dropped significantly. The average cutting temperature of work- unidirectional vibration cutting.
出处
《机床与液压》
北大核心
2017年第6期62-68,共7页
Machine Tool & Hydraulics
基金
supported by Science Foundation of AVIC I,China (NO.2007ZE54011)
关键词
钛
分子动力学
单向振动切削
椭圆振动切削
Titanium, Molecular dynamics, Unidirectional vibration cutting, EVC
