CFRP制孔加工缺陷及制孔技术的研究进展

Review of the Defects and the Drilling Technology of CFRP

碳纤维增强复合材料(CFRP)已在航空航天飞机上得到了大量应用。在CFRP结构件的装配连接中,需要进行大量的制孔加工。但在CFRP制孔中极易产生毛刺、分层等制孔缺陷,严重影响制孔质量和构件使用性能,尤其是分层制孔缺陷是造成构件报废失效的主要原因。针对分层制孔缺陷的研究现状,重点阐述制孔缺陷的形成机制及制孔缺陷的评价方法,再梳理CFRP制孔工艺方法及其制孔刀具的研究现状。面对高模量CFRP制孔难度不断加大的趋势,为了抑制CFRP制孔中制孔缺陷的产生,指出CFRP制孔加工下一步研究的重点。

The carbon fiber reinforced polymer(CFRP)has been widely applied in aviation industry.A variety of drilling operations are usually required to achieve assembly for CFRP components.CFRP drilling is prone to produce many unique damages,such as burrs(or uncut fibers),delamination.The drilling qualities and the components performance are affected seriously by these defects,especially by the delamination.The delamination is the main reason for the rejection of the CFRP parts.In view of domestic research situation of the delamination,the formation mechanism and the evaluation methods of the delamination are emphasized in detailed.And the making hole processing technology and the tools are reviewed.Along with the high modulus CFRP drilling becoming harder and harder,the study emphases in future research are indicated to reduce the drilling-induced defects.