SiCp/Al复合材料与传统的金属材料相比,具有优异的物理和热学性能.但在孔加工中,棱边加工缺陷成为影响其在高端产品中使用的主要问题之一.开展金刚石涂层刀具钻削SiCp/Al复合材料的试验研究,对试验力学信号进行分析,对出入口棱边缺陷形成机理及形貌特征做出了解释.结果表明:使用金刚石涂层刀具钻削SiCp/Al复合材料时,每步钻削深度、进给速度和主轴转速对轴向力的作用依次减弱;出口处质量明显优于入口处,入口缺陷形成机理主要是Al基体的断裂和SiC颗粒脱落;金刚石涂层钻头适合用于加工SiCp/Al复合材料.对于SiCp/Al复合材料的实际加工应用有一定的参考价值.%Compared to traditional metal materials, SiCp/Al composites has excellent physical and thermal proper-ties. However, hole edge quality in the he holed drilling process becomes one of the main problems influencing the usability of the composites. In this paper, experimental study on drilling of SiCp/Al composites with diamond coated bits is carried out, the measured mechanical signals, the formation mechanisms and characteristics of hole edge defects are analyzed. It is shown that in the drilling process the process parameters have influence on the thrust force, and their effect are ordered as each drill depth, feed speed and spindle speed; the hole quality at the exit is better than that at the entrance; the defect for-mation mechanisms mainly include the fracture of Al matrix and the detachment of SiC particle. And the diamond coated bits are suitable for the drilling of SiCp/Al composites. It has reference value for the actual processing and application of SiCp/Al composites.
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