The Research On Parametric Simulation Of High Frequency Welded Pipe Of Composite Aluminum Alloy

As people’s consciousness of environmental protection and energy saving gradually strengthening, facing the new norm that the number of motor vehicle increasing in China, it is an urgent need to reduce energy consumption of the vehicle, which demands the light-weight of its heat exchanging system, namely the light-weight of heat exchanger tubes, and therefore motor vehicles need a lot of radiator parts that manufactured by high-frequency welded pipes of new aluminum alloy. Based on the high-frequency induction welding tube of composite aluminum alloy as the research object, the paper mainly analyzes the effects between the welding parameters and the quality of welded pipe; it mainly does the following three aspects:First, We establish finite element model of high frequency welded pipe through finite element analysis software ANSYS and load in the form of a line heat source model of function. We can solve and obtain welded tube map of temperature field. It is analyzed that different welding parameters collected during the production of the commissioning, the results show that there is a certain relationship between the welding speed and power; of which both have a great influence on the temperature of the weld point.Second, Using the analysis of welding temperature field of high frequency tube and displacement constraint conditions, solving the finite element model of the high frequency welded pipe. We can get welded pipe’s stress distribution nephogram and the displacement- time curve, observing and analyzing the change trend of residual stress and strain in welded pipe, the results show that welding residual tensile stress in the welded area of pipe is biggest of all, we need to reduce the residual stress in the subsequent processing.Third, Through burst test of hydrostatic pressure of pipes, we can judge the quality of welded pipe and indirectly determine the rationality of welding parameters. Experimental results show that the bigger welding residual tensile stress of the welded area of pipe is, the smaller pipe’s blasting pressure value is, and the open position is often in the welded area of pipe. It shows that the theoretical analysis results of finite element simulation can reflect accurately the actual welding process.