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Wuhao Zhuang,Lin Hua,Xiaowen Wang,Yanxiong Liu,Liying Dong,Heping Dai 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.2
Roll-forging process is widely used to fabricate the automobile front axle beams. The reasonable selection of the process parameters is significant to ensure the quality and improve the property of the automobile front axle beam owing to the complexity and importance of the preliminary roll-forging process. This paper developed a 3D Finite element (FE) model of the preliminary roll-forging process of the AISI-1045 automobile front axle beam under the Deform-3D platform. A corresponding experiment is subsequently conducted. Good agreement between the experimental and simulative results validates the employed model. Based on this dependable FE model, the influences of initial temperature of billet T 0 , rotational speed of rolls n and friction factor m on the geometric dimension, temperature inhomogeneity, deformation inhomogeneity, and roll-forging load are investigated comprehensively. The results can provide reliable guidelines for the selection of process parameters.
Liying Dong,Xinghui Han,Lin Hua,Jian Lan,Wuhao Zhuang 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.4
In a cold rotary forging press with double eccentricity bushings, the rotation speed ratio of double eccentricity bushings has significanteffects on the rocking tool path. Thus, this study examines the effects of the rotation speed ratio of double eccentricity bushings on therocking tool path of cold rotary forging presses. On the basis of kinematics relations, the motion equations of the rocking tool with doubleeccentricity bushings are obtained. The effects of the rotation speed ratio of double eccentricity bushings on the rocking tool path arestudied by using the obtained motion equations.