Investigation on pre-stress shot peen forming process of aluminum alloy 2024-T351

Author:  X.Huang, Y. Zeng
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.433-438)
Doc ID:  2014116
Year of Publication:  2014
Abstract:  
Pre-stress shot peen forming is a method to form large integral wing skin panels. In this paper, a set of pre-stress experimental device of shot peen forming is developed and the influence of process parameters on the curvature of aluminum 2024-T351 are investigated. The rules of the comprehensive effect of air pressure of nozzle, movement velocity, thickness of part and pre-stress on finial curvatures are obtained. Based on multiple regression analysis method, finial curvatures prediction model of process parameters is established. The result shows that the maximum curvature deviation between the experimental results and the prediction ones is within 8.9%. It is found that the developed equation can be used to optimize the process parameters and to predict the finial curvatures after pre-stress peen formed.