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자동차 타이어용 금형의 열변형 예측에 관한 수치해석적 연구
양호동(Hodong Yang),오율권(Yoolkwon Oh),김용범(Yongbum Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In the present study, numerical analysis applying a finite element method(FEM) is used to predict the thermal strain of mold for automobile tire. To investigate the thermal strain and characteristic of Aluminum(Al) alloy mold, it is performed that the contraction rates and stress occurred by temperature distributions on the inside of Al alloy mold during the cooling process were calculated from the numerical works. Also, numerical results of Al alloy mold were compared with those of mild steel mold in order to obtain the improved precision and good quality of mold. Therefore, in the present study, the results of numerical analysis are presented to help to make the effective and the best mold products.
타이어 몰드의 정밀주조를 위한 알루미늄 합금 금형의 열적특성 고찰
김용범(Yongbum Kim),양호동(Hodong Yang),오율권(Yoolkwon Oh) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study numerically and experimentally investigated on thermal characteristics of aluminum alloy (Al-alloy) mold for precision casting of automobile tire mold. The Al-alloy tire mold was selected the produced tire mold in a manufacturing factory and its manufacturing system was applied the method of metal casting instead of sand casting. When the AC7A selected as a casting material is injected to inner casting device, the temperature, displacement and stress distributions occurred inside of Al-alloy tire mold until completed solidification of its were numerically calculated by finite element method (FEM). Also, the temperature distribution was experimentally measured under the same condition of numerical analysis. The results of numerical study revealed that temperature distribution inside of Al-alloy tire mold occurred a rapid cooling from the beginning injection of casting material to about 20 minutes. And, the results of displacement and stress distributions and patterns were happened at the measurement points of tread part due to the rapid temperature difference in mold. Moreover, the result of experimental study revealed that temperature distribution also measured the similar pattern as a numerical study during the cooling time about 20 minutes.
알루미늄 합금을 사용한 타이어 몰드의 열변형에 관한 수치해석적ㆍ실험적 연구
오율권(Yoolkwon Oh),김용범(Yongbum Kim),양호동(Hodong Yang) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Numerical analysis using a finite element method was applied to analyze that aluminum alloy mold was happened the difference of temperature distribution. Beside, thermal strain rate occurred by temperature distribution investigated to predict the accurate measurement variations of aluminum alloy. In results of this study, aluminum alloy represented rapidly cooling graph during initial 20 minutes after beginning cooling process, therefore value of stress and displacement is rapidly changed during initial 20 minutes after beginning cooling process. In addition to, temperature distribution obtained by experiment confirmed corresponding pattern then compared numerical analysis with experiment. These results are contributed to make the effective and the high precision casting mold.
AC7A 알루미늄 합금 금형의 응고과정에서 금형 내부에 발생하는 열변형에 대한 수치해석적 연구
오율권(Yoolkwon Oh),김용범(Yongbum Kim),양호동(Hodong Yang) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The manufacturing industry such as automobile tire must be changed to consult the tastes of customers and is required to make the finest product that it has improved more stability and driving performance at consumer's desire in a quick time. In the present study, AC7A aluminum alloy casting mold which consist of 8 pieces is introduced as an analysis model. Also, numerical work using a finite element method was applied to investigate the thermal deformation that included the temperature distribution, stress and strain during the cooling process in AC7A aluminum alloy casting mold. The numerical results such as temperature distributions, stress and strain are presented to help to make the effective and the best tire mold. In addition, the introduced technique of numerical work using a finite element method is very useful and especially needs to improve the precision of tire mold such as sectional type or puzzle type.
AC7A를 이용한 사형주조에서 타이어 몰드의 열변형에 관한 유한요소 해석
오율권(Yoolkwon Oh),김용범(Yongbum Kim),양호동(Hodong Yang),박근욱(Keonuk Park),서동표(Dongpyo Seo) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
The present study analyzed on thermal strain of the AC7A tire mold produced in sand castings by FEA. To predict the numerical result of thermal strain in AC7A mold during the cooling process, it is performed the investigation of temperature distribution, stress and strain based on the physical properties of AC7A. In results of this study, the temperature distribution result of AC7A mold is more uniform than mild steel mold and the cooling time of AC7A mold is more short than it. Also, the results of strain and stress in AC7A mold is better than it. In addition, AC7A and mild steel mold is revealed that cooling curve was observed the rapid pattern in 20 minutes after beginning cooling process and difference in temperature of mold is the biggest. These results are presented to help to make the effective and the precision tire mold. Also, the introduced technique of numerical analysis is very useful and especially needs to improve the high precision mold in the industrial aspect.
FEM을 이용한 Tire Mold용 Al 금형의 온도분포 및 수축량 해석
오율권(Yoolkwon Oh),김재열(Jaeyeol Kim),서동표(Dongpyo Seo),양호동(Hodong Yang),박근욱(Keunuk Park),김우진(Woojin Kim) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
The plant of Al alloy mold should be established to produce the good quality tires. However, mild steel mold is used as tire mold which is consist of one piece. This type of metal mold is more economic in the total cost but the quality of product is not enough. Therfore, in this study, Al alloy mold which consist of six pieces was introduced. Also, numerical analysis using a finite element method (FEM) was applied to analyze that Al alloy mold was happened the characteristics of temperature distribution. Moreover, the contraction rate occurred by temperature distribution investigated to predict the accurate measurement variations of Al alloy mold.