针对高体积分数SiCp/Al复合材料的加工难题,采用在线电解修整精密磨削加工工艺对其进行精密磨削实验研究.首先,通过建立单颗粒磨削模型,得到磨粒的最大变形磨屑厚度,进而利用Matlab软件,得到SiCp/Al复合材料塑性域磨削的试验参数范围.然后,通过单因素试验探究磨削深度、砂轮转速以及工件移动速度对加工表面粗糙度的影响,利用正交试验最优参数与理论分析得到的塑性域磨削的试验参数范围进行对比,确定了最优工艺参数.最后,以最优试验参数对体积分数40%的SiCp/Al复合材料进行精密磨削加工,获得表面粗糙度Ra 0.030μm的加工表面.研究表明：应用ELID精密磨削加工工艺,采用W5铸铁基金刚石砂轮,当砂轮转速为1500 r/min,磨削深度在0.1μm,工件移动速度为2 m/min时,磨削效果最佳.%In view of the high volume fraction of SiCp/Al composites processing problem, on-line electrolytic dressing ( ELID ) precision grinding processing technology is used to carry on precision grinding experimental study for SiCp/Al composites. First, by establishing single particle grinding model, the maximum grinding grain deformation of the chip thickness was obtained, and then using Matlab software, the scope of test parameters of the SiCp/Al composite plastic domain grinding was obtained. Second, through single factor experiment, the grinding depth, speed of grinding wheel and workpiece speed effects on machining surface roughness were obtained, and then compared the optimal parameters of the test obtained from orthogonal experiment with the scope of test parameters of the SiCp/Al composite plastic domain grinding obtained from theoretical analysis, the optimal process parameters were determined. Finally, carrying on precision machining for the volume fraction of 40% of SiCp/Al composites by using the optimal experimental parameters, the machined surface roughness of Ra 0. 030μm was obtained. Research shows that applying ELID precision grinding processing technology and using W5 cast iron funds corundum grinding wheel, when the speed of the grinding wheel is 1 500 r/min, the grinding depth is 10μm and workpiece speed is 2 m/min, the best grinding effect can be obtained.
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