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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 forming regularity of the beam in the front subframe of a car, the numerical simulation research on the high-pressure beam forming in a car using a multi-pass procedure is carried out by means of the nonlinear finite element software AUTOFORM. The reasonable loading path and the setting of the main parameters were determined. The maximum wall thickness reduction rate was 19.84% by simulation. Based on this, the relationship between the low temperature annealing treatment, the friction coefficient of the contact surface of the die and the pipe, The impact of the maximum reduction rate of the law. The results show that, compared with the annealing without annealing method, the maximum reduction rate will be significantly reduced, and the wall thickness distribution more uniform; the same time, the smaller the friction coefficient, the smaller the wall thickness reduction rate, and the cross-section The closer the wall thickness distribution is to the initial wall thickness.