| In this paper, a mathematical model of copper-steel high frequency induced deposition welding is established based on the basic principle of induction heating. In this model, characteristics of high frequency induced deposition welding used in copper-steel dissimilar metals welding, knowledge of electromagnetics and heat transfer, theory of finite element method are considered. The size and relative position with the device of workpiece in welding process are also considered. ANSYS is used to simulate the temperature field of copper-steel high frequency induced deposition welding. By setting the welding time, different parameters are set under the same conditions to simulate the temperature field, so as to investigate the effect of these parameters on the induction heating and guide the actual welding.Basic principle and effect of induction heating are briefly introduced, while the finite element mathematical model of electromagnetic field, the finite element mathematical model of temperature field and boundary conditions are also introduced, providing a theoretical basis for numerical analysis based on ANSYS. ANSYS and general analytical processes are briefly introduced.Different parameters of heating time, frequency of the power supply, diameter of the induction coil, the gap between the workpiece and the heating coil, the height and position of the heating coil are changed to analyze the effect of the above factors on the induction heating under the same conditions.At the same time, welding parameters are set to practice the actual welding. In actual welding, the temperature of the point of steel substrate at the same height of the upper copper is measured and the temperature cycling curve is obtained at this point. Compared with the temperature of the point of welding simulation, the result is found to be within the error of 10% and the overall trend is the same. The shear strength of the joint is found 183MPa by the shear test to meet the requirements. |
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