High-efficiency ultrasonic assisted drilling of CFRP/Ti stacks under non-separation type and dry conditions

• Published in: Journal of Zhejiang University. A. Science Vol. 25; no. 4; pp. 275 - 291
• Main Authors: Ying, Enze, Zhou, Zehua, Geng, Daxi, Shao, Zhenyu, Sun, Zhefei, Liu, Yihang, Liu, Lianxing, Jiang, Xinggang, Zhang, Deyuan
• Format: Journal Article
• Language: English
• Published: Hangzhou Zhejiang University Press 01.04.2024; Springer Nature B.V; School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China%Beijing Chenjing Electronics Company Limited,Beijing 100015,China%Aerospace Times Feihong Technology Company Limited,Beijing 100094,China
• Subjects: Carbon fiber reinforced plastics; Civil Engineering; Classical and Continuum Physics; Cutting force; Cutting parameters; Drilling; Efficiency; Engineering; Feed rate; Industrial Chemistry/Chemical Engineering; Mechanical Engineering; Research Article; Separation; Stacks; Surface roughness; Titanium base alloys; Tool life; Tool wear; Workpieces; Carbon fiber-reinforced plastic and titanium alloy (CFRP/Ti) stacks; CFRP/Ti叠层; 切削力; Tool wear; Surface integrity; 刀具磨损; 超声辅助钻削; 表面质量; Ultrasonic-assisted drilling (UAD); Cutting force; Ultrasonic-assisted drilling(UAD); Carbon fiber-reinforced plastic and titanium alloy(CFRP/Ti)stacks
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.A2300227

In this study, to address the low efficiency for conventional ultrasonic-assisted drilling (UAD) of carbon fiber-reinforced plastic and titanium alloy (CFRP/Ti) stacks, feasibility experiments of non-separation UAD, in which continuous cutting between the tool and the workpiece occurs at a high feed rate, are carried out. The experimental results indicate that, compared to conventional separation UAD, the non-separation UAD effectively reduces the cutting forces by 24.2% and 1.9% for CFRP stage and 22.1% and 2.6% for the Ti stage at the feed rates of 50 and 70 µm/r, respectively. Furthermore, the non-separation UAD significantly improves hole quality, including higher hole diameter accuracy, lower hole surface roughness, and less hole damage. In addition, the non-separation UAD can decrease adhesive tool wear. This study demonstrates that, compared to conventional drilling (CD), the non-separation UAD can effectively improve drilling quality and tool life while maintaining high efficiency.