A theoretical model for load prediction in rolling correction process of thin-walled aeronautic parts

作者：Lu, L. X.; Sun, J.^*; Li, Y. L.; Li, J. F.

来源：International Journal of Advanced Manufacturing Technology, 2017, 92(9-12): 4121-4131.

DOI：10.1007/s00170-017-0420-0

• Distortion correction
• Bilateral rolling
• Load prediction
• FEM
• Thin-walled part

In the aviation industry, flexural distortion of thin-walled aeronautic parts after machining processes is inevitable, especially for high-strength aluminum alloy. To satisfy the accuracy requirement for subsequent assembly processes, the distorted parts have to be corrected. Bilateral rolling operation has been proved to be an effective method for correcting the flexural distortion. However, this method is generally based on trial and error, and the quality of distortion correcting cannot be guaranteed. To solve this problem, finite element method (FEM) was first adopted to investigate the distortion feature after bilateral rolling process for T-shaped structures. The relationship between processing parameters and maximum deflection was then studied. An equivalent bending moment method was proposed to represent the effects of bilateral rolling on micro-plastic deformation and residual stresses. Besides, a theoretical model was established for distortion prediction. Furthermore, based on simulation results, the calculation formula of the equivalent load was deduced. Finally, the theoretical model and the equivalent bending moment method were verified by rolling correction experiments, which were used to calculate the rolling correcting load (rolling depth). The results show that the average reduction rate of deflection is 73.5%. This paper provides an effective theoretical model for predicting the correction load in rolling correction process for thin-walled aeronautic parts.

• 出版日期2017-10
• 单位山东大学