基于ABAQUS的单个颗粒与加工面碰撞对固液两相流加工的影响研究

Influence of colliding of single particle and the processing wall on solid-liquid flow processing with ABAQUS

针对固液两相流加工过程中磨粒如何影响加工效果的问题,提出了磨粒与工件之间的摩擦状况是直接影响抛光过程与抛光质量的重要因素的假设。根据实际加工的实验材料数据,利用ABAQUS非线性有限元分析软件,研究了单磨粒对工件表面的接触作用与材料去除的关系;然后搭建了固液两相流实验平台,对试验钢条进行了软性磨粒流加工。实验结果表明,加工表面的磨损分布比较均匀,表面的粗糙度明显降低,体现了固液两相流加工的有效性。研究结果表明,实际加工中加工表面在受到水平切削力和竖直挤压力共同作用下,产生了塑性变形继而发生切削磨损,最终提高了加工表面的抛光效果,达到了镜面级加工效果的目的,同时通过使用ABAQUS软件可从微观直接说明固液两相流无工具精密加工机理。

Aiming at the problem that how particles affect the outcome of the solid-liquid flow processing,a hypothesis that the friction between the particle and the processing will be a vital factor that influences both the process and the polishing quality was presented. According to the real experimental processing data,the material removal was studied when the single particle comes into contact with the processing wall, using ABAQUS software. Then the experiment was set up to polish the steel strip with solid-liquid flow. The experiment results show that the abrasion is evenly distributed and the surface roughness greatly improved which means that the solid-liquid flow is valid in polishing process. The results indicate that the combined action of horizontal cutting force and vertical pressing force will cause plastically deformation and further abrasion in real machining, improving the surface roughness to mirror finish. Meanwhile, the mechanism of solid-liquid flow precision machining without tools can be viewed directly through ABAQUS software in microscopic.