变参数超声啄式钻削CFRP/TC4不同钻孔顺序试验研究  

Experimental Study on Variable-Parameters Ultrasonic Pecking Drilling With Different Drilling Sequences for CFRP/TC4 Stacks

作　　者：刘凤宇 陈涛[1] 段振岩 索煜豪 张川电 LIU Fengyu;CHEN Tao;DUAN Zhenyan;SUO Yuhao;ZHANG Chuandian(Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学,武汉430070

出　　处：《航空制造技术》2025年第7期92-99,123,共9页Aeronautical Manufacturing Technology

摘　　要：碳纤维增强树脂基复合材料(Carbon fiber reinforced plastic,CFRP)/TC4叠层材料被广泛应用于航空航天领域。CFRP/TC4叠层材料钻孔加工一般采用单一工艺,本研究将超声辅助钻削与啄式钻削相结合,形成超声啄式钻削(Ultrasonic pecking drilling,UPD)工艺,并对材料进行钻孔加工。针对叠层材料,钻孔顺序的改变会导致不同的孔加工质量以及刀具磨损。为此,本文从该角度对UPD下CFRP/TC4叠层材料轴向力、CFRP出口损伤、刀具磨损等方面进行了分析,发现沿CFRP→TC4方向钻孔时,CFRP出口损伤较低,最大分层因子降低了21.9%;而沿TC4→CFRP方向钻孔时,轴向力更低,刀具主切削刃磨损较少。通过对两种钻孔顺序下孔内壁进行扫描电镜观察以及粗糙度检测发现,TC4→CFRP方向钛切屑缠绕有利于改善孔内壁质量。Carbon fiber reinforced plastic(CFRP)/TC4 stacks are widely used in aerospace fields.Drilling of CFRP/TC4 stacks is generally performed using a single-process method.In this study,ultrasonic-assisted drilling and pecking drilling were combined to form a novel ultrasonic pecking drilling(UPD)process for drilling these materials.The variation in drilling sequences for stacks significantly affects hole quality and tool wear.Therefore,this paper analyzes the thrust force,CFRP exit damage,and tool wear during UPD of CFRP/TC4 stacks.The results indicate that the drilling in the CFRP→TC4 direction reduces CFRP exit damage,with the maximum delamination factor decreased by 21.9%;Drilling in the TC4→CFRP direction generates lower thrust force and causes less wear on the tool’s main cutting edge;Scanning electron microscopy(SEM)observations and surface roughness measurements of the hole walls under both drilling sequences demonstrate that titanium chip entanglement in the TC4→CFRP direction improves hole wall quality.

关 键 词：碳纤维增强树脂基复合材料(CFRP) TC4 超声啄式钻削(UPD) 变参数 损伤分析 

分 类 号：TB332[一般工业技术—材料科学与工程]