大型机翼整体壁板系统化喷丸成形技术

doi:10.7527/S1000-6893.2019.22635

Abstract

Abstract: Large integral wing skin panels are important integral structures of modern large aircrafts. These panels usually constitute the aerodynamic shape of aircraft directly. Shot peening is generally the preferred process for the forming of modern large wing skin panels made of high strength aluminum alloy. It is, however, still a difficult issue to precisely shot peen form these large wing skin panels in modern aircraft manufacturing industry. In this paper, a systematic method is proposed for shot peen forming of large wing skin panels. The factors that may influence the precision of shot peen formed large wing skin panels are classified into error of plane panel, accuracy of designed process parameters, control accuracy of process parameters, and environmental factors. The plane panel is optimized by minimizing deformation potential energy to reduce the dimension error induced by plane panel. To increase their accuracy and efficiency, the peening parameters are comprehensively designed by a combination of methods of data fitting, artificial neural network, and analytical model. Correction formulae for plane panel are presented to account for the influence of environmental temperature and oscillation of peening parameters to the final shape and dimensions of the shot peened wing skin panel. Portable shot peening machine is used to locally and gradually correct the panel from peen forming line to its desired shape. Industrial practice on shot peen forming of wing skin panels shows that the systematic method presented in this paper can effectively improve the precision and efficiency of wing skin panel shot peen forming and fulfill the requirement of industrial production.

Key words: large wing, integral wing skin panel, shot peening, shot peen forming, systematic method, precise forming

CLC Number:

V261.91

ZHAO An'an, ZHANG Xianjie, GAO Guoqiang, LIU Libin, WANG Yongjun. A systematic method of shot peen forming of large integral wing skin panels[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(2): 522635-522635.

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A systematic method of shot peen forming of large integral wing skin panels

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