| 유도가열을 이용한 강판성형공정에서 변형량 예측을 위한 계산식 유도 |
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| Derivation of Simplified Formulas to Predict Deformations of Plate in Steel Forming Process with Induction Heating |
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Kang-Yul Bae, Young-Soo Yang, Chung-Min Hyun, Seok-Hee Won, Si-Hoon Cho |
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| Abstract |
Recently, the electro-magnetic induction process has been utilizing to substitute the flame heating process in shipyard. However, few studies have been performed to exactly analyze the deformation mechanism of the heating process with mathematical model. This is mainly due to the difficulty of modeling the inductor travelling on plate during the process.
In this study, heat flux distribution of the process is firstly numerically analysed with the assumption that the process has a quasi-stationary state and also with the consideration that the heat source itself highly depends on the temperature of base plate. With the heat flux, the thermal and deformation analyses are then performed with a commercial program for 34 combinations of heating parameters. The deformations obtained and heating parameters are synthesized with a statistical method to produce simplified formulas, which easily give the relation between the heating parameters and deformations. The formulas are well compared with results of experiment. |
| Key Words:
Steel forming, Electro-magnetic induction, Heat-source analysis, Heat-flow analysis, Deformation analysis, Angular deformation, Transverse shrinkage, FEM, Statistical method, Simplified formula |
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