2A16铝合金簸箕形薄壁件成形工艺

Forming process on dustpan-shaped thin-wall part for 2A16 aluminum alloy

确定了一种2A16铝合金簸箕形薄壁件的成形工艺方案,并采用DYNAFORM软件进行有限元模拟,研究成形过程中的裂纹和起皱等影响产品质量的问题。通过模拟分析得到了铝合金簸箕形薄壁件在不同凸凹模间隙和压边力下的凸凹模间隙-最大减薄率和增厚率曲线、压边力-最大减薄率曲线、压边力-最大增厚率曲线,对比了不同毛坯尺寸时的工件成形质量,确定了最佳工艺参数为:毛坯尺寸为237.42 mm×319.24 mm、凸凹模间隙为1.75 mm、压边力为50 kN。将成对拉深与单件拉深进行对比,发现材料利用率提升了48.498%,产品加工效率提高了1倍。最终通过拉深成形实验,验证了成对拉深成形方案和各工艺参数的合理性,为簸箕形薄壁件的成形提供了技术参考。

A forming process scheme of dustpan-shaped thin-walled part for 2A16 aluminum alloy was determined,and software DYNAFORM was used for finite element simulation to study the problems affecting the product quality such as cracks and wrinkles during the forming process.Then,for aluminum alloy dustpan-shaped thin-walled part,the punch-die clearance-maximum thinning rate and thickening rate curves blank holder force-maximum thinning rate curve,and blank holder force-maximum thickening rate curve were obtained by simulation analysis at different punch-die clearances and blank holder forces,and by comparing the forming quality of workpiece with different blank sizes,the optimal process parameters were determined as the blank size of 237.42 mm×319.24 mm,the punch-die clearance of 1.75 mm and the blank holder force of 50 kN.Furthermore,compared with single piece deep drawing,the material utilization rate was increased by 48.498%,and the product processing efficiency was doubled by paired deep drawing.Finally,through the deep drawing experiment,the rationality of the paired deep drawing scheme and the process parameters were verified,which provided technical reference for the forming of dustpan-shaped thin-wall parts.