超声振动辅助切削三维SiCp/Al复合材料温度仿真研究

Temperature simulation of ultrasonic assisted cutting of three-dimensional SiCp/Al composites

铝基碳化硅(SiCp/Al)复合材料由于优异的性能在航空航天、汽车生产等领域中得到了广泛的应用。为了深入了解超声振动辅助车削SiCp/Al的切削机理,使用有限元仿真软件ABAQUS建立了超声振动辅助车削SiCp/Al的三维仿真模型,并分别对颗粒、基体及内聚力模型进行定义。针对所建立的三维模型仿真分别分析了不同切削速度、切削深度、刀具振幅以及刀具振动频率的SiCp/Al切削温度。从仿真结果可以看出:超声振动辅助切削SiCp/Al时,SiC颗粒的温度普遍比Al基体的温度要低,切削过程中工件的温度与切削速度、切削深度和刀具的振幅成正比,但是随着刀具振动频率的增加温度反而会降低,另外在剪切带的切削温度最高。

Aluminum-based silicon carbide(SiCp/Al) composites have been widely used in aerospace, automobile production and other fields because of their excellent properties. In order to deeply understand the cutting mechanism of ultrasonic vibration-assisted turning SiCp/Al, a three-dimensional simulation model of ultrasonic vibration-assisted turning SiCp/Al was established by using finite element simulation software ABAQUS, and the particle, matrix and cohesion models were defined respectively.According to the established three-dimensional model simulation, the SiCp/Al cutting temperatures with different cutting speeds, cutting depths, tool amplitudes and tool vibration frequencies are analyzed respectively. From the simulation results, it can be seen that when cutting SiCp/Al by ultrasonic vibration, the temperature of SiC particles is generally lower than that of Al matrix, and the temperature of workpiece is directly proportional to cutting speed, cutting depth and amplitude of cutter, but the temperature will decrease with the increase of cutter vibration frequency, and the cutting temperature in shear band is the highest.