砂轮约束磨粒喷射精密光整加工工艺特性研究  

Study on characteristics of abrasive jet precision finishing process with grinding wheel as restrain

作　　者：李长河[1] 蔡光起[1] 刘枫[1] 

机构地区：[1]东北大学机械工程与自动化学院

出　　处：《金刚石与磨料磨具工程》2005年第5期41-44,共4页Diamond & Abrasives Engineering

基　　金：国家自然科学基金资助项目(项目编号:50475052);高等学校博士学科点专项科研基金资助项目(项目编号:20040145001)

摘　　要：研究了砂轮约束磨粒喷射精密光整加工工艺特性,分析了磨粒尺寸、磨料流体浓度、加工循环、砂轮速度、携带流体对加工表面质量的影响.利用平面磨床M7120对Q235A进行喷射加工实验,用TALYSURF轮廓仪测量加工后的微观几何参数值,用扫描电镜和金相显微镜观察表面微观形貌.实验结果表明,选用质量分数10%W7 Al2O3微粉与防锈润滑液进行喷射加工20～30循环,不仅保持或获得高的表面形状精度,而且又可高效的获得具有粗糙度Ra0.15～1.6μm的无缺陷加工表面,明显去除磨削加工过度塑性变形,减少表面层污染和磨削烧伤,实现高效、高精度、低粗糙度,并且磨削和抛光可以集成的表面精密光整加工新方法.The process technique on abrasive jet finishing process with wheel as restrain was investigated. The effects of different particle size, abrasive concentration, machining cycles, the velocity of grinding wheel and the medium type on the surface quality were analyzed. Experiments were performed with plane grinder M7120 and workpiece material Q235A. The machined surface morphology was studied using SEM and microscope and microcosmic geometry parameters were measured with TALYSURF instrument. The experimental results under the conditions of percentage 10 abrasive concentration, W7 Al2O3 particle and machining 20-30 circles showed that, the new technique can not only attain higher surface form accuracy, to diminish grinding defects such as severe deformation, surface layer pollution and ground burnout, but also can efficiently acquire defect-free finishing surface with Ra0. 15 - 1.6μm and finally achieve high efficiency, high precision and low roughness values, furthermore, integrating grinding process and abrasive jet finishing process into one features.

关 键 词：砂轮约束 磨粒喷射 精密光整加工 工艺特性 表面粗糙度 

分 类 号：TG74[金属学及工艺—刀具与模具] TH161.1[机械工程—机械制造及自动化]