Electromagnetic Modeling and Thermal Analysis of a Non-Axisymmetric System for Induction Brazing

Abstract

The electromagnetic process happening between an induction brazing coil and the brazing assembly was studied and is described in the following pages. Using the tools of numerical analysis, we managed to achieve 3-D simulation of the process, which includes presentation of the magnetic field, thermal heat transfer, and time dependence. The results presented are considered for two of commonly used materials—copper and stainless steel in the shape of pipes. The induction brazing coil is a complex C-shape to match with the real industrial practices. The results obtained from the model are in accordance with the experimental results, as in both the model and the experiment, the required temperature was reached in about 6 s. It was found that during the brazing process, the inductance of the winding increases by about 4 nH and the resistance by 1.5 mΩ, which is important for the coordination of the power supply.

Synthesis of Induction Brazing System Control Based on Artificial Intelligence

“…Both values are difficult to define analytically, especially in a complex form of the coil, such as that of the considered induction brazing system in Figure 2. Using COMSOL Multiphysics™ model for numerical 3D modeling of the brazing process, presented in [11] and verified by comparison with laboratory tests, the required power for brazing of the joints composed of different materials is determined. Figure 3 demonstrates the power depending on the duration of the technological process required for brazing; one of the most commonly used joints in practice is pipe-pipe, choosing three variants of the material-copper, brass, and stainless steel (the same material for both pipes).…”