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采用Deform-3D软件对变形体在水平滑动结构ECAP模具内变形行为进行了有限元模拟,重点研究了水平滑块运动速度与挤压杆下行速度之间的比率(v2/v1)、变形体与模具底部滑动结构之间的摩擦系数对最大挤压载荷和应变的影响规律。结果表明:随着v2/v1的增加,最大挤压载荷总是呈下降趋势;最大挤压载荷与变形体主要变形区截面等效应变近似呈Boltzman函数规律变化;工件与模具底部滑动结构之间的摩擦系数对最大挤压载荷和应变的影响与v2/v1值有关。
The Deform-3D software is used to simulate the deformation behavior of the deformable body in ECAP mold with horizontal sliding structure. The ratio between the velocity of the horizontal slider and the descending speed of the extruding bar (v2 / v1) The influence of the friction coefficient between the sliding structure at the bottom of the mold on the maximum compressive load and strain. The results show that the maximum compressive load always decreases with the increase of v2 / v1. The equivalent compressive strain at the maximum compressive load and the main deformation zone of the deformed body changes approximately in the Boltzman’s law. The difference between the maximum compressive load and the sliding structure at the bottom of the mold The effect of the friction coefficient on the maximum crush load and strain is related to the v2 / v1 value.