A prediction model of milling force for aviation 7050 aluminum alloy based on improved RBF neural network
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ORIGINAL ARTICLE
A prediction model of milling force for aviation 7050 aluminum alloy based on improved RBF neural network Yaonan Dai 1 & Xiaotao Zheng 1 & Xubing Chen 2 & Jiuyang Yu 1 Received: 7 March 2020 / Accepted: 1 September 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Semi-finishing is an important step to reduce the cutting vibration and deformation caused by the thin-walled stiffening rib parts of aeronautical inertial control products during the finishing process. In the semi-finishing process, the variation of cutting force is a key factor of machining deformation. A large number of samples considering the effect of cutting parameters, such as spindle speed, feed per tooth, and milling width were simulated by the finite element simulation software AdvantEdge to obtain the milling forces based on 7050 aluminum alloy (Al7050) for aviation. Moreover, the standardized Euclidean distance was introduced to the radial basis neural network model (RBF-NN) to develop an improved RBF neural network model (IRBF-NN), and a high-precision model to predict the effect of cutting parameters on the thin-walled semi-finishing milling forces was established based on the proposed IRBF-NN. Results show that the maximum relative errors of milling force obtained by the genetic algorithm–optimized BP neural network model (GA-BP-NN), RBF-NN, and IRBF-NN are 13.9%, 12.5%, and 4.1%, respectively. Accordingly, the proposed IRBF-NN has high accuracy and effectiveness to predict milling force for the semi-finishing of aerospace Al7050 thin-walled stiffening rib parts. Keywords Milling force . Al7050 . AdvantEdge . IRBF-NN
1 Introduction In the field of aviation [1], aircraft attack efficiency and accuracy are directly affected by the manufacturing accuracy of inertial control products [2]. As a key component in inertial control products, the thin-walled stiffening rib part [3] is mainly made of 7050 aluminum alloy (Al7050) [4].
* Xiaotao Zheng [email protected] Yaonan Dai [email protected] Xubing Chen [email protected] Jiuyang Yu [email protected] 1
Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment, School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
2
School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Considering that Al7050 is prone to bending, warping, and other problems during the finishing process of low-rigidity parts, such as thin-walled stiffening rib parts, three methods of rough machining, semi-finishing, and finishing are usually used to control the machining accuracy, quality stability, and machining efficiency of thin-walled parts. Shi et al. [5] used 1500, 2000, and 2500 rpm to study the effect of tool path on the cutting force of Al7050. Jiang et al. [6] utilized 4000 rpm to study the effect of milling force on the residual stress of Al7050-T7451. Ju et al. [7] investigated 5000 rpm to analyze the extraction meth
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