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| Combined electromagnetic and thermal FEM modeling of heavy cylinder during induction heating process |
| SUN Jian-liang， QIU Chou-wu， PENG Yan， DONG Zhi-kui， CHANG Rong-wei |
| （National Engineering Research Center for Equipment and Technology of Cold Strip Rolling， Yanshan University， Qinhuangdao 066004， Hebei， China） |
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Abstract The three dimensional electromagnetic-thermal model of heavy cylinder during induction heating process was established based on ANSYS and ANSOFT Maxmell software. Considering the problem of corner effect during induction heating， the following three solutions were proposed： Changing the rectangular coil to the I-type coil； Welding a heat-treatment ring at the end of the heavy cylinder； Welding a heat-treatment ring at the end of the heavy cylinder and also adding magnetic conductor at the end of the coil. The distribution of temperature and stress under different solutions were simulated in the current study. The simulation results show that the end of heavy cylinder would be overheated and burned because of the corner effect and the high magnetic flux density at the end of heavy cylinder when the rectangular coil was used for induction heating. The corner effect was weakened by using I-type coil during induction heating process， but it caused the insufficient temperature at the end of heavy cylinder after heating. Welding heat-treatment ring at the end of the heavy cylinder was an effective method to remove the corner effect， but the end of the heavy cylinder was still overheated. By welding heat-treatment ring at the end of the heavy cylinder and also adding magnetic conductor at the end of the coil， not only could the corner effect be removed， but also the overall heating effect was improved. Meanwhile， the thermal stress was acceptable for the heavy cylinder material.
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Received: 18 March 2016
Published: 02 November 2016
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2016, Vol. 51 
