GH4169外螺纹滚压过程ABAQUS有限元仿真模型建立及验证

Establishment and Verification of ABAQUS Finite Element Simulation Model for GH4169 External Thread Rolling Process

为深入揭示GH4169外螺纹滚压成型机理,利用ABAQUS建立其外螺纹滚压过程有限元仿真模型并进行实验验证。滚压过程中,滚丝轮和圆柱形工件间的接触区域不断发生变化,属于复杂接触类型。为此,较为详细地介绍有限元模型建立过程中的材料本构模型、求解类型、网格划分及自适应网格、接触及边界条件等关键技术,利用能量法、外螺纹成型样貌以及最大径向力验证了该仿真模型的有效性。

In order to reveal the rolling forming mechanism of GH4169 outer thread in depth,the finite element simulation model of rolling process of GH4169 outer thread was established by ABAQUS and verified by experiment.During the rolling process,the contact area between the roller and cylindrical workpiece changes constantly,which belongs to the complex contact type.Therefore,the key technologies such as material constitutive model,solution type,grid partition and adaptive grid,contact and boundary conditions during the establishment of finite element model are introduced in detail.The validity of the simulation model is verified by energy method,external thread shape and maximum radial force.