针对航空铝合金非等厚薄壁框架构件应力模型进行分析,结合实验测试技术和喷砂表面处理,就构件表面形态变化对其变形的影响进行研究.结果表明:首先,这类构件加工后变形呈现侧壁弯曲不一致的复杂性,且弯扭变形明显.第二,由于侧壁和底面垂直,可分别在各部位进行喷砂处理,以方便获得想要的变形矫正效果.第三,随着喷砂表面覆盖次数的增加,引起的变形也会增加,但效果会逐渐减弱.在实验中发现,表面处理可以矫正和减少构件的变形,使其回复率超过35％～50％,这说明喷砂表面处理工艺对构件变形具有调节作用.
Based on the analysis of stress model of unequal-thickness thin-walled frame aluminum alloy,combined with the experimental testing technology and sand-peening (SP) surface treatment,influence of the surface properties of the components on its deformation was studied.The results show that first of all,the deformation of these components after machining shows the complexity of bending inconsistency of the side wall,and obvious bending and torsion.Second,since the sidewalls and the bottom of the component are perpendicular,they can be sandblasted respectively,which is convenient to obtain the predicted deformation of the component.Third,the increase in the number of sandblasted surface coverage will lead to increased deformation,but the effect will be gradually reduced.In the experiment,the appropriate surface treatment can correct and reduce the deformation of components,so that the recovery rate is more than 35％-50％.The research shows that the blasting surface treatment process has positive effects on the deformation of the component.
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