18CrNiMo7-6钢研抛工艺试验研究

Experimental Research on Lapping and Polishing Process of 18CrNiMo7-6 Steel

探究研抛工艺参数对工件材料去除率和表面粗糙度的影响。以砂纸和金刚石喷雾抛光剂为研抛介质,通过正交试验研究砂纸细度、研抛压力、研抛速度、研抛时间对18CrNiMo7-6工件材料去除率和表面粗糙度的影响。采用三维形貌仪、千分尺、电子天平和超景深显微镜对18CrNiMo7-6工件的表面粗糙度、厚度、质量和表面形貌进行测量分析,以材料去除率和表面粗糙度为评价指标,得到最佳的研抛工艺参数组合。在最佳工艺参数组合下,砂纸研磨工件的材料去除率为0.86μm/min,表面粗糙度为Ra0.048μm,金刚石抛光剂抛光后工件表面粗糙度为Ra0.024μm。砂纸研磨最佳工艺参数为:砂纸细度800#,研磨压力0.2MPa,研磨速度30rpm,研磨时间30min。抛光最佳工艺参数为:抛光压力0.2MPa,抛光速度30rpm,抛光时间15min。

To investigate the influence of lapping process parameters on workpiece material removal rate and surface roughness. The sandpaper and diamond spray polishing agent were used as the polishing medium. The effects of sandpaper fineness, lapping and polishing pressure, polishing speed and polishing time on the material removal rate and surface roughness of 18 CrNiMo7-6 workpiece were studied by orthogonal test. The surface roughness, thickness, quality and surface morphology of 18 CrNiMo7-6 workpieces were measured by three-dimensional shape analyzer, micrometer, electronic balance and ultra-depth microscope. The material removal rate and surface roughness were used as evaluation indexes to obtain the best combination of process parameters. Under the optimal combination of process parameters, the material removal rate of the sandpaper grinding workpiece was 0.86μm/min, the surface roughness was Ra 0.048μm, and the surface roughness of the workpiece after polishing with diamond polishing agent was Ra 0.024μm. The optimal process parameters for sandpaper grinding are: sandpaper fineness of 800#, lapping pressure of 0.2 MPa, lapping speed of 30 rpm, and lapping time of 30 min. The optimal process parameters for polishing are: polishing pressure 0.2 MPa, polishing speed 30 rpm, polishing time 15 min.