面向大型环件径轴向稳定高效轧制的变形过程规划方法研究

Research on radial-axial deformation process planning method for large ring rolling with stability and high efficiency

针对大型环件径轴向轧制成形过程规划问题,根据成形锻件和环坯的尺寸特征,提出了一种轧制变形路径规划的理论模型,确定了关键参数对理论模型的线型及其曲率变化的影响规律和选取方法;建立了芯辊进给速度数学模型,考虑环件径向轧制孔型的锻透和咬入条件以及环件外径扩大速度,确定了相关参数的合理范围,结合轧制变形路径和芯辊径向进给速度,得到上锥辊的轴向进给速度;针对典型截面环件轧制变形过程进行规划,借助ABAQUS软件建立了大型环件径轴向轧制热力耦合三维有限元模型,并按照所规划的过程进行了仿真,仿真结果表明,该规划方法可以保证环件轧制过程顺利稳定进行,并通过实验进行了验证。

Aiming at the planning problem of the radial-axial rolling process of large ring,a theoretical model of rolling deformation path planning was proposed according to the size characteristics of formed forgings and ring blanks,and the influence laws and selection methods of key parameters on the linetype and curvature changes of the theoretical model were determined.The mathematical model of the mandrel feed speed was established.Considering the forging penetration and bite conditions of the radial rolling pass of ring and the expanding speed of the outer diameter of ring,the reasonable ranges of the relevant parameters were determined.Combined with the rolling deformation path and the radial feed speed of mandrel,the axial feed speed of the upper cone roll was obtained.The typical section ring rolling deformation process was planned.With the help of ABAQUS software,the three-dimensional thermal mechanical coupling finite element model of radial-axial rolling of large ring was established,and the simulation was carried out according to the planned process.The simulation results show that the planning method can ensure the ring rolling process proceed successfully and stably,which was verified by experiments.