CFRP/TC4叠层结构制孔技术对比实验

Comparative Test of CFRP/TC4 Stack Structure Drilling Technology

因CFRP、TC4材料的物理性能差异较大,导致CFRP/TC4叠层构件切削性能匹配性较差,钻削过程中存在界面损伤、CFRP孔壁损伤难以调控的问题。针对上述问题,本文采用变参数啄式钻削工艺、变参数钻削工艺和恒参数钻削工艺对CFRP/TC4叠层结构进行了制孔实验,并对不同工艺条件下的轴向力、界面质量、TC4的切屑形态、CFRP层孔壁质量进行了对比分析。结果表明:相对于其他两种钻削工艺,在变参数啄式钻削工艺条件下,TC4材料层轴向力明显较高,产生短带状和短螺旋状切屑;CFRP层出口和入口处的孔径更接近于名义孔径,孔壁缺陷较少,表面粗糙度相对较小。

Due to the great difference of physical properties between CFRP and TC4 materials,the cutting performance matching of CFRP/TC4 stack components was poor.There were some problems such as interface damage and CFRP hole wall damage that were difficult to control during drilling.In view of the above problems,the drilling experiments of CFRP/TC4 stacks were carried out by using variable parameter pecking drilling technology,variable parameter drilling technology and constant parameter drilling technology.The thrust force,interface quality,chip morphology of TC4 and hole wall quality of CFRP under different process conditions were compared and analyzed.The results show that the thrust force of TC4 obtained by variable parameter pecking drilling process is significantly higher than that under the other two processes,and short ribbon and short spiral chips are produced.The diameter at the exit and entrance of the CFRP stack are closer to the nominal diameter,and the hole wall defects are less,and the surface roughness is relatively low.