大型饼类锻件预镦粗工序的数值模拟研究

Research on the simulation of prior upsetting for heavy disk forgings

为了解决镦粗变形缺陷,将饼类锻件的预镦粗工序分为锥台砧镦粗和平砧端面整平两个阶段,利用DEFORM-3D计算平台建立锻造过程的有限元模型并进行仿真分析;分别从锻件内部的应力场和应变场等方面研究了锥台砧锥角和压下率对镦粗过程的影响,平砧旋转锻造方式和下砧砧形对端面整平过程的影响,以获得合理的预镦粗锻造工艺参数,指导实际生产过程。

In order to solve the deformation defect,prior upsetting is split into upsetting of frustum anvil and surface flattening of flat anvil,and the forging process is modeled and simulated by DEFORM- 3D finite element software. Based on the simulation result of stress and strain field in forging,it shows the detail about upsetting and surface flattening such as the parameters of frustum degree,reduction ratio,rotation mode of flat anvil and the down anvil shape. It obtains the rational forging parameters,provides the theoretical basis for the process design of heavy disk forgings.