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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.
김종관,김상복,이중기,김화정 한국공작기계학회 1999 한국생산제조학회지 Vol.8 No.1
According to the development of tool material and the improvement of machinability of cutting material like aluminium alloy, the higher spindle speed is needed. However, the higher speed causes the heat generation of bearings, the deformation of spindle unit parts, and the rotational accuracy of spindle to be worse. Therefore, it is essential to analyze and control the heat generation and the thermal behavior of spindle unit in order to have higher speed and better rotational accuracy. This paper shows the analogy between the analyzation of heat generation and thermal behavior of high speed spindle system by finite element method and the test results of actual temperature rise through running test, and shows the necessity of cooling the spindle and inner ring side of bearings for the thermal balance of high speed spindle system.