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자동차용 자동변속장치의 피니셔형 구조 부품의 생산효율 개선을 위한 열간 단조 최적 성형 공정기술 연구
김화정(H. J. kim),김용조(Y. J. Kim) 한국소성가공학회 2016 한국소성가공학회 학술대회 논문집 Vol.2016 No.4
This study is the tension of the hot forging products in research related to improving productivity of hot forging process for the production of the inner race with a finisher-type gear structure of the automatic transmission is applied to a car which may occur in the shape of hot rolling of the inner race interpret and analyze the forging process using a finite element method in order to minimize forging defects in stress cracking by producing a prototype based on the result thereof, and Adjust the hot forging process through re-interpretation and analysis based on the results of the production of prototypes for some parameters such as flow pattern of metal optimally to secure and build inner race productivity-based hot forging process of automatic transmissions and also off.
김현수(H. S. Kim),강호석(H. S. Kang),김용길(Y. G. Kim),김용조(Y. J. Kim) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
In order achieve a high durability and light weight, a suspension control arm, which has absorbed vibration and impact, for motor vehicles has been designed a very complex cross-sectional shape. It is very difficult to a hot forging process because the cross-sectional area in the middle body of the control arm is relatively small compared to the ends of the control arm, and the middle body has twisted in the longitudinal direction. In this study, a four step forging process was investigated. The hot forging process consists of; 1)preform by forging roll, 2)bending, 3)blocker, and 4)finisher. However, the investigation of the preform of the forging roll, in order to reduce the material input weight per forging weight, focused on the preform on the forging roll stage. The hot forging processes were conducted using FE simulations, the simulation results have been compared with experimental results and also relatively in good agreement with the experimental results.
김현필,김용조,Kim, H.P.,Kim, Y.J. 한국금형공학회 2012 한국금형공학회지 Vol.6 No.2
A counter shaft gear is an important part in the transmission system of vehicle. Its shape is relatively complicated and should meets high strength. Traditionally it has been manufactured as follows; the counter shaft gear has consisted of a clutch and helical body with teeth which are forged and machined for teeth respectively and then attached by frictional welding. In this study, a new hot forging process was proposed and designed so that the counter shaft gear is formed as one body without divide it into two parts. Furthermore, the precision forging process has been developed for the clutch teeth without additional grinding.