In this paper

the process of silencer tube hydroforming was studied through methods combining ofnumerical simulation and experimental basing on the problem of splitting near the weld area during inner hydroforming of silencer tube. In the experiment silencer tube hydroforming was finished with HF1000 hydroforming machine，then we used dynaform to do numerical simulation of the experiment process，mainly simulated the distribution of stress near the weld and wall thickness during inner hydroforming of silencer tube. Comparing with the experiment results，We G’an get (Iuahty plpe Wlth least (lefOrmatlon stress an(1 best (hstrlbutlon Of Wall th1G’kness Whenusing concave linear load path within the hydroforming.