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应用弹塑性大变形有限元法,对连铸铜管坯三辊行星轧制过程进行了三维有限元模拟研究。通过坐标变换的方法建立了三辊行星轧制有限元模型,该模型考虑了轧辊的倾斜角β和偏转角α。模拟分析得出三辊行星轧制过程中管坯断面要经受一个由圆形到三角形再归到圆形的变形过程。得出在三辊行星轧制过程中起到主要作用的是三向压应力状态,有利于坯料的大变形和提高轧制管材性能。同时模拟分析得到三辊行星轧制过程中坯料质点的运动轨迹和相应规律。该模拟计算对探索复杂的三辊行星轧制规律具有重要意义。
By using the elasto-plastic large deformation finite element method, the three-dimensional finite element simulation of the three-roll planetary rolling process of continuous casting copper tube blank was carried out. The three-roller planetary rolling finite element model was established by coordinate transformation. The model considered the roll angle β and deflection angle α. The simulation results show that the cross-section of the tube during the rolling process of the three-roller planetary is subjected to a deformation process from circular to triangular and then back to the circular shape. It is concluded that the three-direction compressive stress plays a major role in the rolling process of the three-roller planets, which is good for the large deformation of the billet and the improvement of the properties of the rolled pipe. At the same time, the motion trajectory and the corresponding law of the billet particle in the process of three-roller planetary rolling are obtained through simulation. This simulation calculation is of great significance for exploring the complex rolling rules of three-roller planetary gears.