大尺寸2024-T351铝合金喷丸成形曲率变化规律研究  

Curvature Change Law of Large Size 2024-T351 Aluminum Alloy under Shot Peening Forming

作　　者：尹佳 贾保国 杨辉 徐刚 胡彦华 李凡 王安恒 YIN Jia;JIA Baoguo;YANG Hui;XU Gang;HU Yanhua;LI Fan;WANG Anheng(AVIC Xi'an Aircraft Industry Group Co.,Ltd.,Xi'an 710089,China;Anhui Polytechnic University,Anhui Wuhu 241000,China)

机构地区：[1]中航西安飞机工业集团股份有限公司,西安710089 [2]安徽工程大学,安徽芜湖241000

出　　处：《精密成形工程》2024年第3期165-170,共6页Journal of Netshape Forming Engineering

摘　　要：目的以喷丸成形工艺下的2024-T351铝合金平板件和单筋件为研究对象,分析弦向及展向曲率半径试验值与拟合值的变形规律。方法针对试件厚度、喷丸压力、喷丸速度、预弯量4个参数进行喷丸成形操作的正交试验,通过测量成形后曲率的变化规律,分析不同参数组合对平板件和单筋件成形变化规律的影响。结果在不考虑材料性能波动的情况下,随着平板件厚度和喷丸速度的增大,平板试件的弦向曲率半径和展向曲率半径均呈递增趋势;而随着喷丸压力的增大,平板试件的弦向曲率半径和展向曲率半径则呈现递减趋势,即当平板件厚度和喷丸速度增大时,喷丸成形对平板试件弯曲的影响程度有所增大,曲率半径减小;反之,喷丸成形对平板试验件弯曲的影响程度减小,曲率半径增大。结论在忽略初始状态并将其假设为自由状态或给定预弯量状态的条件下,随着喷丸速度的增大,单筋试件的曲率半径递增,试验值与拟合值的变化趋势基本相符,二者最大偏差为11.2%。The work aims to take 2024-T351 aluminum alloy flat and single rib parts under shot peening forming technology as the research object to analyze the deformation laws of chord and spanwise curvature radius test values and fitting values.The orthogonal experimental method was adopted to apply four parameters,namely specimen thickness,shot peening pressure,shot peening speed,and prebending amount,to the shot peening forming operation.The curvature change law after forming was measured,and the forming change law of flat and single rib parts was analyzed under different parameter combinations.Re-gardless of the material performance fluctuation,as the thickness of the flat specimen and the shot peening speed increased,both the chordal curvature radius and the spanwise curvature radius of the flat specimen showed a decreasing trend.As the shot peening pressure increased,the chord curvature radius and the spanwise curvature of the flat specimen both decreased.When the thickness and shot peening speed of the flat specimen increased,the bending degree of the flat specimen by shot peening form-ing increased,resulting in a decrease in the curvature radius.When the shot peening pressure increased,the degree of bending of the flat specimen caused by shot peening decreased,resulting in an increase in the curvature radius.Regardless of whether the initial state is a free state or a given prebending state,as the shot peening speed increases,the curvature radius of the single rib specimen increases.The experimental values are basically consistent with the fitted values,with a maximum deviation of 11.2%.

关 键 词：喷丸成形 2024-T351铝合金 曲率半径 正交实验 喷丸速度 

分 类 号：V26[航空宇航科学与技术—航空宇航制造工程]