基于单磨粒划擦仿真的钛合金抛光机理研究  

Research on the Mechanism of Titanium Alloys Polishing Based on Scratch Simulation of Single Abrasive Particle

作　　者：李奇 于天彪[1] 王宛山[1] LI Qi;YU Tianbiao;WANG Wanshan(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819

出　　处：《组合机床与自动化加工技术》2023年第11期1-5,10,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家重点研发计划项目(2017YFA0701201)。

摘　　要：自由磨粒抛光被认为是最常用和最重要的抛光方法之一,抛光垫、自由磨粒和工件之间的相互作用形成了接触区域的材料去除,材料去除机理的研究对于抛光过程控制和工艺参数优化具有重要意义。建立了单磨粒划擦热-力耦合有限元模型,研究了钛合金抛光过程中的材料去除机理,发现了单个磨粒高速划擦过程中的“水漂效应”现象,且随着划擦速度的增加,这种效应越加明显。当在相同的划擦速度下减小划擦力时,材料去除方式由连续去除变为不连续去除。因此,当单个磨粒高速划擦时,会产生类似于轴向超声抛光的轨迹。该研究为钛合金抛光高速划擦过程中的微观材料去除机理提供了理论参考。Free abrasive polishing is considered to be one of the most commonly used and important polishing methods,the interaction between polishing pad,free abrasive particles and workpiece forms the material removal in the contact area,the study of material removal mechanism is of great significance for polishing process control and process parameter optimization.In this paper,a thermal-mechanical coupled finite element model of single abrasive particle scratching was established,and the material removal mechanism during the polishing process of titanium alloys was studied,the"water drift effect"phenomenon in the high-speed scratching process of single abrasive particle has been discovered,and the effect becomes more obvious as the scratch speed increases.When the scratch force is reduced at the same scratch speed,the method of material removal changes from continuous removal to discontinuous removal,therefore,when single abrasive particle at high speed,it will produce a trajectory similar to that of axial ultrasonic polishing.The provides a theoretical reference for the microscopic material removal mechanism in the high-speed scratching process of titanium alloys polishing.

关 键 词：钛合金 抛光 材料去除机理 水漂效应 数值模拟 

分 类 号：TH161[机械工程—机械制造及自动化] TG68[金属学及工艺—金属切削加工及机床]