摘要
碳纳米管作为增强相的加入会使碳纳米管铝基复合材料(CNTs/Al)在磨削过程中产生不同的表面缺陷,为了探究其磨削机理和不同的去除方式,对CNTs/Al复合材料进行仿真和磨削实验研究。结果表明,磨削加工后铝基体表面会出现毛刺、凹坑、突起和沟壑等现象,碳纳米管的主要去除方式有压入基体、断裂和拔出等。通过正交实验分析可以得出影响加工表面粗糙度大小的磨削参数依次是砂轮线速度、进给速度和磨削深度。由单因素实验可知随着砂轮线速度增大,表面粗糙度变小;增大进给速度或磨削深度时,表面粗糙度会变大。选择砂轮线速度为30 m/s,进给速度为0.6 mm/min,磨削深度为10μm加工时,工件表面粗糙度最小。探究出CNTs/AL复合材料的磨削机理和磨削参数对表面质量的影响,在工业中对磨削加工时参数和方式的选择提供了依据,可以显著提高加工精度和生产率。
The addition of carbon nanotubes as a reinforcing phase would cause different surface defects in the grinding process of carbon nanotube aluminum matrix composites(CNTs/Al).In order to explore the grinding mechanism and different removal methods,the simulation and grinding experiments of CNTs/Al composites were carried out.The results show that there are burrs,pits,protrusions,and ravines on the surface of the aluminum matrix after grinding.The main removal methods of carbon nanotubes are pressing into the matrix,breaking and pulling out.Through orthogonal experimental analysis,it can be concluded that the grinding parameters that affect the roughness of the machined surface are the grinding wheel speed,feed speed,and grinding depth.It can be seen from the single-factor experiment that the surface roughness decreases with an increase in grinding wheel speed.When the feed rate or grinding depth is increased,the surface roughness will become larger.When the grinding wheel speed is 30 m/s,the feed speed is 0.6 mm/min,and the grinding depth is 10μm,the surface roughness of the workpiece is the smallest.Mastering the grinding mechanism of CNTs/AL composites and the influence of grinding parameters on surface quality provides a basis for the selection of grinding parameters and methods in industry,which can significantly improve the machining accuracy and productivity.
作者
恽大可
高奇
YUN Dake;GAO Qi(College of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,China)
出处
《组合机床与自动化加工技术》
北大核心
2025年第5期161-167,共7页
Modular Machine Tool & Automatic Manufacturing Technique
基金
辽宁省自然科学基金项目(2022-MS-375)。
