摘要
复合材料因其比强度高、抗疲劳腐蚀性好、结构轻等优点广泛应用于飞机结构件中。在复合材料损伤后机械螺接修理过程中,为了解决复合材料制孔时容易出现出口分层和撕裂、表面质量不高、刀具磨损快的制孔难题,在超声纵振套磨钻切削刃的运动和制孔机理分析基础上,介绍了包括纵振手钻、套磨钻、超声电源和换能器等在内的超声纵振制孔系统,通过普通套磨制孔和超声纵振套磨制孔对比试验,研究复合材料套磨制孔过程中的排屑、刀具磨损和制孔质量问题。试验结果表明,超声纵振套磨制孔增大了排屑空间,缓解了料芯堵屑,有助于排屑;有效抑制了复合材料孔口分层和撕裂,纤维以剪切断裂为主,孔表面光洁平整,提高了制孔质量;刀具外壁磨损小,内壁磨粒锋利性保持良好,提高了刀具耐用度。
Composite materials were widely used for various aircraft structural components because of their superior mechanical and physical properties such as high specific strength,high figure strength,light weight and so on.However,when composite materials after damage were machined,hole-making trouble such as layer delamination and tearing,low surface and rapid tool wear quality occurred,so the mechanism of ultrasonic-assisted vibration(UAV)core drilling was studied on the base of analyzing the motion and the hole-making mechanism of drill cutter,it was introduced that the portable ultrasonic-assisted drilling system including the hand drill,the core drilling,the ultrasonic power supply and transducer.The experiments including core drilling and UAV were comparative studied.The problems of the chip removal,tool wear and hole quality during core drilling hole-making were studied.The experimental results showed that the ultrasonic-assisted vibration core drilling could increase chips-removal space,the greater clearance coupled and help wash away the chips which effectively prevented layer delamination and tearing at the exit hole,the broken of fiber was mainly shear fracture,the hole around surface was more smooth,therefore improved the surface quality around the hole edges,UAV could reduce the tool outer wall wear,the sharpened grinding grain at inner wall maintained very good,and prolonged the tool life.
作者
杨后川
张献缝
杜晓伟
谈镦名
张星星
YANG Houchuan;ZHANG Xianfeng;DU Xiaowei;TAN Dunming;ZHANG Xingxing(Air Technical Sergeant School,Air Force Engineering University,Xinyang 464000,China;95606 Troop,Luzhou 646000,China)
出处
《新技术新工艺》
2020年第10期26-30,共5页
New Technology & New Process
基金
装备军内科研计划项目(KJ2016C2129)。
关键词
复合材料
超声纵振
超声手钻
套磨制孔
composite materials
ultrasonic-assisted vibration
the ultrasonic-assisted hand drill
core drilling hole-making
作者简介
杨后川(1971-),男,博士,副教授,主要从事高性能材料高效机械加工技术和飞机结构修理等方面的研究。
