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Open AccessArticle

Modeling and Optimization of Bidirectional Clamping Forces in Drilling of Stacked Aluminum Alloy Plates

by Jintong Liu 1,2, Anan Zhao 3, Piao Wan 2, Huiyue Dong 2 and Yunbo Bi 1,2,*
1
State Key Laboratory of Fluid Power and Mechatronic System, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
2
Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
3
Aviation Industry Corporation of China Xi’an Aircraft Industry (Group) Limited Company, Xi’an 710089, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(12), 2866; https://doi.org/10.3390/ma13122866
Received: 3 June 2020 / Revised: 22 June 2020 / Accepted: 23 June 2020 / Published: 26 June 2020
Interlayer burrs formation during drilling of stacked plates is a common problem in the field of aircraft assembly. Burrs elimination requires extra deburring operations which is time-consuming and costly. An effective way to inhibit interlayer burrs is to reduce the interlayer gap by preloading clamping force. In this paper, based on the theory of plates and shells, a mathematical model of interlayer gap with bidirectional clamping forces was established. The relationship between the upper and lower clamping forces was investigated when the interlayer gap reaches zero. The optimization of the bidirectional clamping forces was performed to reduce the degree and non-uniformity of the deflections of the stacked plates. Then, the finite element simulation was conducted to verify the mathematical model. Finally, drilling experiments were carried out on 2024-T3 aluminum alloy stacked plates based on the dual-machine-based automatic drilling and riveting system. The experimental results show that the optimized bidirectional clamping forces can significantly reduce the burr heights. The work in this paper enables us to understand the effect of bidirectional clamping forces on the interlayer gap and paves the way for the practical application. View Full-Text
Keywords: drilling; stacked aluminum plates; interlayer gap; bidirectional clamping force drilling; stacked aluminum plates; interlayer gap; bidirectional clamping force
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MDPI and ACS Style

Liu, J.; Zhao, A.; Wan, P.; Dong, H.; Bi, Y. Modeling and Optimization of Bidirectional Clamping Forces in Drilling of Stacked Aluminum Alloy Plates. Materials 2020, 13, 2866.

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