消音管内高压成形焊缝区胀裂数值分析

Numerical Analysis of Weld Zone Splitting During Silencer Tube Hydroforming

针对消音管在内高压成形过程中,焊缝区附近易出现胀裂的问题,采用数值模拟与实验相结合的方法,对消音管的内高压成形过程进行了研究.实验采用HF1000内高压成形机进行消音管的内高压成形实验,并利用dynaform软件进行对该实验的过程进行了数值模拟,实验模拟了消音管在内高压成形过程中焊缝附近的应力分布情况和壁厚的分布情况,并与实验结果对比验证,发现使用凹形直线加载路径进行内高压成形实验时,能够使得到的管件在变形过程中产生的应力最小,管件的壁厚分布情况最好.

In this paper, the process of silencer tube hydroforming was studied through methods combining of numerical simulation and experimental basing on the problem of splitting near the weld area during inner hydroform- ing of silencer tube. In the experiment silencer tube hydroforming was finished with HFIO00 hydroforming ma- chine, then we used dynaform to do numerical tion of stress near the weld and wall thickness simulation of the experime during inner hydroforming nt process, mainly simulated the distribu- of silencer tube. periment results, we can get quality pipe with least deformation stress and best distribution using concave linear load path within the hydroforming. Comparing with the ex- of wall thickness when