【作者】 符昊； 许华； 符永宏；

【Author】 Fu Hao,Xu Hua,Fu Yonghong(School of Mechanical Engineering,Jiangsu University,Zhenjiang Jiangsu 212013 China)

【机构】 江苏大学机械工程学院；

【摘要】 采用ABAQUS有限元软件,数值模拟了筒形件的塑性成形过程。揭示了模具表面不同区域摩擦特性对板厚、拉深力、材料流动和最大周向应变的影响规律,获得了影响筒形件成形过程中产生起皱和拉裂现象的主影响区和次影响区。由此表明,模具表面摩擦特性具有显著的区域性特征。对起皱而言,凹模压边区与凹模圆角区较大的摩擦系数能有效抑制起皱,凸模圆角区较小的摩擦系数也能抑制起皱;对拉裂而言,凸模圆角区较大的摩擦系数,凹模压边区、凹模圆角区较小的摩擦系数能有效地抑制拉裂。更多还原

【Abstract】 This article simulate metal forming process of cup-shaped dies by using the software ABAQUS.Then by analyzing the rules of influence about friction properties of different areas through thickness、forming force、 material flowing、maximum circumferential strain,we found the main-affected regions and minor-affected regions of wrinkling and fracture in forming process.Based on the results above,friction properties on the surface of dies showed regional characteristics.To restrain wrinkling,we may increase the friction coefficient of die blank holder area and die fillet,or decrease the friction coefficient of punch fillet;to restrain fracture,we may increase the friction coefficient of punch fillet,or decrease the friction coefficient of die blank holder area and die fillet.更多还原