In the track of metro vehicle manufacturing process

stainless steel body side wall beam adopting column structure has the characteristics of large size

welding parts

how to predict and control the welding deformation

to ensure that the design size is an urgent research topic in rail vehicle manufacturing plant. Firstly

the long-term tracking of a side wall unit after welding flatness were found

the welding deformation of the side wall of the unit;secondly

the establishment of a local finite element model

the simulation of welding deformation using the finite element software

analyze the reason of side wall unit deformation trend

and puts forward the applied reverse before welding two kinds of beam deformation and increase the process control measures;finally the feasibility of this method is proved

the control unit of the factory wall stainless steel side welding deformation has important significance.