锻压技术

轿车加强梁内高压成形规律的仿真研究

英文标题：Simulation study on the hydroforming regulation of reinforcing beam of car

作者：贾宇坤罗建斌李健何延之

分类号：TG394

出版年,卷(期):页码：2017,42(2):183-188

摘要：

针对轿车前副车架加强梁内高压成形技术，为了研究其成形规律，借助非线性有限元软件AUTOFORM，采用多道次工序开展轿车加强梁内高压成形数值模拟研究。确定了合理加载路径及主要参数设置，通过仿真计算其壁厚最大减薄率为19.84%，基于此分析了低温退火处理、模具与管材接触面的摩擦系数对加强梁内高压成形厚度分布以及结构件最大减薄率的影响规律。结果表明，低温退火处理方法较未经退火方法其最大减薄率会有显著降低，并使其壁厚分布更加均匀；同时，摩擦系数越小，壁厚减薄率越小，且对于横截面处壁厚分布越接近于初始壁厚。

In order to study the hydroforming regulation of front subframe reinforcing beam of car, the numerical simulation analysis of multi-pass process was conducted for the entire process of tube hydroforming by the nonlinear finite element software AUTOFORM. Then, a reasonable loading path and the main parameters were confirmed respectively, and the calculated maximum wall thinning rate was 19.84%. Based on the above, the influences of low-temperature annealing and friction coefficient between pipe and die on thickness distribution and the maximum wall thinning rate of reinforcing beam in hydroforming were analyzed. The results show that the maximum thinning rate of reinforcing beam in hydroforming by low-temperature annealing is smaller than that by non-annealing, and the thickness distribution is more uniform. Meanwhile, the smaller the friction coefficient is, the smaller the wall thinning rate is, and the wall thickness distribution is much closer to the initial wall thickness.

基金项目：

广西高等学校优秀中青年骨干教师培养工程（GXQG012013032）；广西科技大学研究生教育创新计划项目（GKYC201619）；柳州市科学研究与技术开发计划课题（2015C060301）；广西汽车零部件与整车技术重点实验室开放课题（2015KFYB03）

贾宇坤（1989-），男，硕士研究生李健（1980-），男，博士，教授

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