加载路径对变径管内高压成形影响的模拟研究

摘要

By using Dynaform software,the impact of loading paths of axial feeding and internal pressure on hydroforming of tubes with variable cross sections is discussed based on the appropriate amount of the total axial feed and the maximum internal pressure.Results indicate that the double linear loading pattern in which the feeding speed in anterior stage is larger than that in the posterior is the best loading path,and the step-loading pattern excels the linear loading pattern a lot,and the step-loading pattern reaches its optimization when the feeding pressure falls into 40~60 MPa.%基于Dynaform有限元模拟软件,在获得合适总轴向进给量以及最大内压力的基础上,重点探讨了轴向进给路径以及内压力加载路径对变径管内高压成形的影响。结果表明：按照前段进给速度大于后段进给速度的双线性轴向进给方式进给能得到一条最优的轴向进给路径;梯形内压加载方式的成形结果要明显优于线性内压加载方式,且当内压区间为40～60MPa时,梯形内压加载方式的成形结果达到最优化。