论文部分内容阅读
Carbon fiber reinforced plastic (CFRP) com-posites are extremely attractive in the manufacturing of structural and functional components in the aircraft manufacturing field due to their outstanding properties,such as good fatigue resistance,high specific stiffness/strength,and good shock absorption.However,because of their inherent anisotropy,low interlamination strength,and abrasive characteristics,CFRP composites are considered difficult-to-cut materials and are prone to generating serious hole defects,such as delamination,tearing,and burrs.The advanced longitudinal-torsional coupled ultra-sonic vibration assisted drilling (LTC-UAD) method has a potential application for drilling CFRP composites.At present,LTC-UAD is mainly adopted for drilling metal materials and rarely for CFRP.Therefore,this study analyzes the kinematic characteristics and the influence of feed rate on the drilling performance of LTC-UAD.Experimental results indicate that LTC-UAD can reduce the thrust force by 39％ compared to conventional drilling.Furthermore,LTC-UAD can decrease the delamination and burr factors and improve the surface quality of the hole wall.Thus,LTC-UAD is an applicable process method for drilling components made with CFRP composites.