Study Of Induction Heating Parameter Sensitivity Of Cu-Al Tube Joints

The induction heating which generates heat through Joule effect resulting from the eddy current of the workpiece is an effective method for metal tube brazing. Due to its high efficiency, precise control and low pollution properties, It has been rapidly developed and widely applied in industrial operations. How to adjust the various parameters of the heating process so that the temperature distribution of the workpiece can meet the production requirements is a common concern. As the numerical simulation has become an effective method for solving of temperature field problem of induction heating as its high efficiency and low cost.This paper deals with numerical simulation of cu-al pipe joints induction brazing process, using the method of electromagnetic/thermal coupled calculation with finite element analysis software ANSYS. The 2D and 3D induction heating calculation model were set up, based on which the influences on the temperature distribution of the heating zone through different current, frequency, coil gap, distance between coil and workpiece, the eccentricity have been analyzed. The results showed that: the average temperature of induction heating zone is basically linear with the applied current and frequency. Besides, it increases as the coil gap and distance between coil and workpiece decreases. The contribution rate on the induction heating zone of each parameter can also be determined based on the actual model.The comparison showed that the results of numerical simulation are consistent with the measured results, providing a scientific basis for practical welding process.