拟间歇振动辅助偏摆车削铝基碳化硅的切屑及表面质量研究

Study On Chip Investigation and Surface Quality in Vibration-assisted Swing Cutting of Aluminum Silicon Carbide

为深入了解拟间歇振动辅助偏摆车削铝基碳化硅的加工机理,建立了拟间歇振动辅助偏摆车削和普通切削加工铝基碳化硅的三维仿真模型,分析不同切削速度下铝基碳化硅的基体与颗粒损伤及不同切削深度的切屑形貌。结果显示:拟间歇振动辅助偏摆车削铝基碳化硅的表面质量与刀具摆动有关,由于其存在切削力、摩擦力和进给力逆转现象,有利于铝基体的塑性创成和颗粒部分断裂,减少颗粒损伤,但随着切削速度的增加而逐渐减弱;与传统车削相比,拟间歇振动辅助偏摆车削的切屑为S形,更容易断裂。因此可以进一步完善拟间歇振动辅助偏摆切削难加工复合材料相关技术。

To gain a comprehensive understanding of the machining mechanism in vibration-assisted swing cutting of aluminum silicon carbide SiCp/Al,a three-dimensional simulation model is established to compare vibration-assisted swing cutting with conventional machining processes of SiCp/Al at different cutting speeds.This research analyzes the damage to the aluminum matrix and particles at various cutting depths and examines the chip morphology.The results indicate that the surface quality of SiCp/Al in vibration-assisted swing cutting is closely related to tool oscillation.The presence of cutting forces,frictional forces,and feed force reversal phenomena promotes plastic deformation of the aluminum matrix and partial fracture of particles,reducing particle damage.However,this effect gradually diminishes with increasing cutting speed.Compared to traditional turning,chips produced during vibration-assisted swing cutting exhibit an S-shaped morphology and are more prone to fragmentation.This study contributes to the further enhancement of technology related to vibration-assisted swing cutting for challenging-to-machine composite materials.