Analysis of Induction Heating in Pipe Bender by Finite-Boundary Element Method

Abstract

A simulation model for induction heating problems in pipe benders is proposed. This model, which is valid for cylindrical geometries, treats a coupling problem between electromagnetic fields and temperature fields. In order to effectively deal with a movement of a pipe during heating process, the electromagnetic field has been solved by Finite-Boundary Element Method. The transient temperature field which is caused by eddy current losses at each time step has been analyzed by Finite Element Method. The influence of temperature on electromagnetic and material properties have been taken into account. In addition, the results of the experiments in the pipe bender for stainless steel pipe, whose diameter is 267mm, are described. The accuracy of the calculation has been confirmed by comparisons with the experimental measurements.