内高压成形制备6063铝合金异形管件的壁厚分布及尺寸精度

发布时间：2019-03-21 07:17

【摘要】：为了实现铝合金副车架在某型国产高档轿车中的应用,对其副车架横梁的内高压成形过程进行实验研究。测量管件内典型截面在压弯、预成形以及内高压成形工序中的环向壁厚分布,分析截面的壁厚分布规律;建立管件内典型截面尺寸的正态概率分布函数,得到截面各尺寸相对于设计值的最大偏差。结果表明:对于膨胀量为2.63%的异形截面A-A,最大减薄位置位于长直边与左下圆角的过渡区,最大减薄率为15.6%;对于膨胀量为3.31%的矩形截面B-B,最大减薄位置位于长直边与右下圆角的过渡区,最大减薄率为15.8%。此外,截面A-A的最大尺寸偏差为0.19 mm,截面B-B的最大尺寸偏差为0.28 mm。两个典型截面的壁厚分布及尺寸精度均满足设计要求。
[Abstract]:In order to realize the application of aluminum alloy sub-frame in a domestic high-grade car, the internal high pressure forming process of its auxiliary frame beam was studied experimentally. The distribution of circumferential wall thickness in the process of bending, pre-forming and internal high pressure forming is measured, and the distribution rule of section wall thickness is analyzed. The normal probability distribution function of the typical section size in the pipe is established, and the maximum deviation of each section size relative to the design value is obtained. The results show that the maximum thinning position is in the transition region between the long straight edge and the lower left fillet, and the maximum thinning rate is 15.6% for the special section A / A with 2.63% expansion. For the rectangular section B B with 3.31% expansion, the maximum thinning position is located in the transition region between the long straight edge and the lower right fillet, and the maximum thinning rate is 15.8%. In addition, the maximum size deviation of section A is 0.19 mm, and the maximum deviation of section B is 0.28 mm.. The wall thickness distribution and dimension accuracy of the two typical sections meet the design requirements.
【作者单位】：哈尔滨工业大学材料科学与工程学院;一汽轿车股份有限公司;
【基金】：长江学者和创新团队发展计划资助基金项目(IRT1229)
【分类号】：TG306

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