砂轮约束磨粒喷射精密光整加工表面微观形貌的研究

Study on Surface Microscopic Morphology of Abrasive Jet Finishing with Grinding Wheel as Restraint

对砂轮约束磨粒喷射精密光整加工表面微观形貌进行分析,研究了工件表面尖峰去除机理和均化及改善波纹度机理。利用平面磨床M7120对精磨后的Q235A工件材料进行喷射加工实验,采用TALSURF5轮廓仪测量加工后表面的微观几何参数值,用扫描电镜观察表面微观形貌变化,用金相显微镜观察磨削烧伤。实验结果表明,随着加工循环次数的增加,表面微观形貌由方向一致的沟槽过渡到随机的、无方向性的微细凹坑,表面粗糙度值明显降低,喷射加工能减轻或消除磨削烧伤。

The surface microscopic morphology of abrasive jet finishing process with wheel as restraint was analyzed. The ground surface peak removal mechanism and homogenizing and improving ripples mechanism were investigated. Experiments were performed with a plane grinder M7120 and workpiece material of Q235A. The machined surface morphology was studied using SEM and microcosmic geometry parameters were measured with TALSURF5 instrument. The ground burnout was investigated with microscope. The experimental results show that the machined surface change from continuous and parallel micro--groove and plough to randomly discontinuous micro--pit can be observed with machining circles increasing. Furthermore, the novelty process method can diminish roughness values and ground burnout obviously.