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자동차 차체 경량화를 위한 중공 알루미늄 압출재의 프레스 성형해석
이효영(H. Y. Lee),여홍태(H. T. Yeo),신긍문(G. M. Shin),허관도(K. D. Hur) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In the recent years, weight reduction of the vehicle is one of the major methods for improving automotive fuel efficiency. The use of low-density material such as high-strength aluminum alloy in the automotive industry is increasing every year. In this study, the aluminum extruded profile is analyzed by two bending processes using a commercial finite-element code (DEFORM-3D) in order to evaluate the press bending process. The first method is using the side-punch and the second method is the press bending process using the wing-die. From the results of FE-analysis, the distribution of the effective strain has been compare the wing-die bending process with the side-punch bending process. Especially, sagging phenomena have been predominant in the side-punch bending.
이효영(H. Y. Lee),여홍태(H. T. Yeo),허관도(K. D. Hur) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In the recent years, the application of reducer in the field of the automation equipment, the precise machine including industrial robot, the medical device and the frontier industry is demanded extraordinary. In order to raise the quality of the product, it is important to verify the design of reducer especially. Double planetary gear is introduced in the reducer, and the FE analysis is applied to the system. According to the characteristics between the objects of gear, two models, the first model is composed of the rigid body to elastic body and the second model is composed of the elastic body to elastic body, are considered in the design. of reducer. A commercial software(Visual Nastran-4D) is used to analyze the motion of the mechanism and the pinion in the reducer is analyzed by the finite element method. It was proposed the proper type between the objects of gear by the analysis, and the improved model in the design of reducer was also evaluated for the stability.