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反转螺旋薄壁管件是一种新开发的高效吸能的异型零件,由于形状比较特殊,加工过程中的厚度分布不均和过度减薄问题一直没有得到很好的解决。通过建立有限元分析模型,对管件液压成形的过程利用有限元分析软件LS-DYNA进行了模拟。利用响应曲面法进行优化得到液压胀形的最佳工艺参数,优化后的薄壁管件厚度分布更加均匀,减薄率在优化后降低了10.258%。最后通过比较优化前后的薄壁管件厚度和减薄率分布情况对优化结果进行了讨论和分析。
Inverted spiral thin-walled tube is a newly developed high-efficiency energy-absorbing special-shaped parts. Due to the special shape, the problem of uneven thickness distribution and excessive thinning in the process has not been solved well. Through the establishment of the finite element analysis model, the hydroforming process of the pipe is simulated by finite element analysis software LS-DYNA. The optimum process parameters of hydraulic bulging were obtained by the response surface method. The optimized thickness distribution of the thin-walled tube was more uniform, and the thinning ratio decreased by 10.258% after the optimization. Finally, the optimization results are discussed and analyzed through the comparison of the thin-walled tube thickness and thinning rate distribution before and after optimization.