Temperate Field Study With Ansys Simulation And Parameter Detection Of Rail Gas Pressure Welding

The technology of rail welding plays a very important role in the engineering of laying continuous welded railway (CWR). With the development of high-speed and heavy-loading track, the quality of rail welding is desired to be more and more exigent. Now, the technology of gas pressure welding has been applying in the engineering of rail welding progressively. The temperature field of gas pressure welding plays a crucial role in the quality of welding joint, so the study of welding temperature field is significant to ensure the traffic safety and quality of welding and reduce the cost of welding.In this paper, a detect system of welding parameter and temperature field is developed with Visual Basic(VB) technology;based on the parameter, the temperature field of gas pressure welding of rails is simulated with ANSYS finite element program;the experiment of temperature detecting is done. After comparing the result of simulation and experiment, the finite element model and simulating result is mended.The results show that the parameter detecting system can detect the welding parameter of rail gas pressure welding real-timely and create the quality report automatically, so it provided a useful means to cast back the welding condition and assess the welding quality and control the quality of rail welding engineering;in the Qing Zang railway where altitude is higher then 3000m, the gas proportion of gas pressure welding of rail should be controlled between 0.96~1.1,while the proportion is often between0.85~0.95 in the area where altitude is lower then 1000m;the three-dimensional (3-D) finite element temperature field model in this paper can describe the dynamic temperature distribution of gas pressure welding of rails, which is useful for optimizing the size of welding-flame nozzle and selecting appropriate welding parameters.