摘要
目的精确控制铝合金壳体成形回弹角度,对铝合金壳体成形工艺进行优化。方法针对影响回弹角度的多个成形工艺参数(保温成形温度、模具间隙、摩擦因数和压边力)进行单变量逐步优化研究。结果随着保温成形温度的升高,壳体回弹角度因流变应力的降低和校正力的升高而逐渐降低;随着模具间隙的增大,可变动模具的圆角半径增大,板材贴合模具程度降低,壳体回弹角度逐渐增大;随着摩擦因数的增大,板材加工的形状与模具更契合,成形后回弹的角度降低;随着压边力的增大,板材内/外表面间的应力差大大降低,回弹角度逐渐降低。结论通过多个参数的逐步优化,获得最终优化工艺参数如下:保温成形温度为310℃,摩擦因数为0.15,模具间隙为1.1 mm,压边力为12 kN,对应的回弹角度为7.027°。
This study takes the optimization of the forming process of aluminum alloy shell as the main research object.In order to improve the springback angle performance of aluminum alloy shell forming.Aimed at multiple forming process parameters that affect the springback angle:heat preservation forming temperature,mold clearance,friction coefficient and blank holder force,a univariate stepwise optimization study was carried out.With the increase of heat preservation forming temperature,the shell springback angle gradually decreased due to the decrease of flow stress and the increase of correction force;with the increase of die gap,the fillet radius of the variable die increased,and the sheet fit the die.The lower the degree is,the springback angle of the shell gradually increases;with the increase of the friction coefficient,the shape of the sheet is more suitable for the mold,thereby reducing the springback angle after forming;the blank holder force increases,and the inner/outer surface of the sheet The stress difference is greatly reduced,and the springback angle is gradually reduced.Through the step-by-step optimization of multiple parameters,the final optimized process is obtained as the heat preservation forming temperature of 310℃,the film material coefficient of 0.15,the die gap of 1.1 mm,the blank holder force of 12 kN,and the corresponding springback angle of 7.027°.
作者
梁家生
LIANG Jiasheng(Guangxi Polytechnic Vocational Technical School,Nanning 530031,China)
出处
《精密成形工程》
北大核心
2024年第2期104-107,共4页
Journal of Netshape Forming Engineering
关键词
铝合金
回弹角度
保温成形温度
模具间隙
摩擦因数
压边力
aluminum alloy
springback angle
heat preservation forming temperature
die gap
friction coefficient
blank holder force
