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In the present study, an axis-symmetric electro-thermo-mechanical model has been developed to analyze a deformation process by continuous resistance heating. The influences of the contact resistance, the current intensity and the die geometry on the temperature distribution were investigated, and the variations of the billet temperature distribution, forming force were obtained. The simulation results correspond well with experimental measured values. Furthermore, the influence of a current increasing during forming on the billet temperature and forming force was predicted in order to optimize the forming technology by continuous resistance heating.

Influence of Upsetting Process on Continues Electric Heating by Coupled Electro-thermal-mechnical Simulation