High performance drilling of T800 CFRP composites by combining ultrasonic vibration and optimized drill structure

钻探 演习 材料科学 推力 振动 分层(地质) 机械加工 超声波传感器 复合材料 结构工程 机械工程 地质学 声学 工程类 物理 古生物学 构造学 冶金 俯冲
作者
Zhefei Sun,Daxi Geng,Fanxing Meng,Li Zhou,Xinggang Jiang,Deyuan Zhang
出处
期刊:Ultrasonics [Elsevier BV]
卷期号:134: 107097-107097 被引量:40
标识
DOI:10.1016/j.ultras.2023.107097
摘要

Drilling of high-strength T800 carbon fiber reinforced plastic (CFRP) are widely employed in current aviation industry. Drilling-induced damages frequently occur and affect not only the load carrying capacity of components but also the reliability. As one of effective methods to reduce the drilling-induced damages, advanced tool structures have been widely used. Nevertheless, it is still difficult to realize high machining accuracy and efficiency by this method. This paper compared three different drill bits to evaluate the drilling performance of T800 CFRP composites and the results showed that the dagger drill was a good choice to drill T800 CFRP considering the lowest thrust force and damages. On this basis, ultrasonic vibration was successfully imposed on dagger drill to further improve the drilling performance. The experimental results showed that ultrasonic vibration reduced the thrust force and surface roughness with a maximum decrease of 14.1 % and 62.2 % respectively. Moreover, the maximum hole diameter errors were decreased from 30 μm in CD to 6 μm in UAD. Besides, the mechanisms of force reduction and hole quality improvement by ultrasonic vibration were also revealed. The results suggest that the combination of ultrasonic vibration and dagger drill is a promising strategy for high performance drilling CFRP.
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