AC7A 알루미늄 합금 주조재를 이용한 타이어 몰드의 열변형에 관한 연구
A Study on Thermal Deformations of Tire Mold using AC7A Aluminum Alloy Casting Material
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The accuracy of tire mold is very important in determining the quality of tire. Because it is made in closed tire mold is a permanent casting device, the investigationon the thermal deformation of tire mold has a lot of trouble. In this study, the thermaldeformations such as temperature, displacement and stress distributions inside the AC7Acasting material for tire mold were analyzed by numerical analysis according to thepreheated temperature of permanent casting device. In order to verify the results ofnumerical analysis, the experiments for temperature measurement of the AC7A castingmaterial were carried out under the same condition with numerical analysis. "COMSOLMultiphysics" was used for the numerical analysis. The preheated temperatures fornumerical analysis were set up 150℃, 200℃, 250℃ and 300℃. The thermal deformationswere calculated in each preheated temperatures. When the preheated temperature is 150℃,displacement and stress are the highest as 0.341mm and 0.481GPa, but the temperature isthe lowest as 267.33℃. When the preheated temperature is 300℃, displacement and stressare the lowest as 0.25mm and 0.351GPa, but the temperature is the highest as 374.27℃. When the experimental results were compared with the numerical results, there weresome temperature differences because of the latent heat by phase change heat transfer. However, the cooling patterns except for the latent heat section were almost similar.
Abstract
The accuracy of tire mold is very important in determining the quality of tire. Because it is made in closed tire mold is a permanent casting device, the investigationon the thermal deformation of tire mold has a lot of trouble. In this study, the thermaldeformations such as temperature, displacement and stress distributions inside the AC7Acasting material for tire mold were analyzed by numerical analysis according to thepreheated temperature of permanent casting device. In order to verify the results ofnumerical analysis, the experiments for temperature measurement of the AC7A castingmaterial were carried out under the same condition with numerical analysis. "COMSOLMultiphysics" was used for the numerical analysis. The preheated temperatures fornumerical analysis were set up 150℃, 200℃, 250℃ and 300℃. The thermal deformationswere calculated in each preheated temperatures. When the preheated temperature is 150℃,displacement and stress are the highest as 0.341mm and 0.481GPa, but the temperature isthe lowest as 267.33℃. When the preheated temperature is 300℃, displacement and stressare the lowest as 0.25mm and 0.351GPa, but the temperature is the highest as 374.27℃. When the experimental results were compared with the numerical results, there weresome temperature differences because of the latent heat by phase change heat transfer. However, the cooling patterns except for the latent heat section were almost similar.
참고문헌 (12)
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