Finite Element Investigation on Cutting Force and Residual Stress in 3D Elliptical Vibration Cutting Ti6Al4V.
Finite Element Investigation on Cutting Force and Residual Stress in 3D Elliptical Vibration Cutting Ti6Al4V.
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3D 椭圆振动切削 Ti6Al4V 切削力和残余应力的有限元研究
DOI：
10.3390/mi13081278
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发表时间：
2022-08-08
期刊：
影响因子：
3.4
通讯作者：
中科院分区：
文献类型：
--
作者：
钛合金是一种典型的难加工材料，具有超高的强度和硬度以及低弹性模量的特点。常规切削由于切削力大、刀具磨损大，难以保证加工质量和效率。椭圆振动切削（EVC）作为一种有效的方法可以提高钛合金的切削加工性。本文采用有限元法（FEM）研究了3D EVC在Ti6Al4V加工中的切削力和残余应力。利用 Johnson-Cook 本构模型来说明 Ti6Al4V 合金的塑性行为。描述了3D EVC的运动学，然后分析了不同切削速度、振动幅度、振动频率和切削深度对切削力和残余应力的影响。仿真结果表明，切削速度、振动幅值a、振动频率和切削深度对主力影响较大。此外，利用3D EVC可以很容易地在加工表面附近获得压应力层，这有助于提高工件的加工性能。
Titanium alloy is a typical difficult-to-machine material with features of superhigh strength and hardness, and low elastic modulus. It is difficult to guarantee the processing quality and efficiency due to the high cutting force and tool wear in conventional cutting. Elliptical vibration cutting (EVC) as an effective method can improve the machinability of titanium alloys. In this paper, the finite element method (FEM) was adopted to study the cutting force and residual stress of 3D EVC in machining of Ti6Al4V. The Johnson-Cook constitutive model was utilized to illustrate the plastic behavior of Ti6Al4V alloy. The kinematics of the 3D EVC was described, and then the influence of various cutting speeds, vibration amplitudes, vibration frequencies and depths of cut on cutting force and residual stress were carried out and analyzed. The simulation results show that the cutting speed, vibration amplitude a, vibration frequency and depth of cut have larger effect on principal force. In addition, the compressive stress layer can be easily obtained near the machined surface by using 3D EVC, which is helpful to improve the working performance of workpiece.
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