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首页> 外文会议>Association for Iron amp; Steel Technology(AIST)/The Minerals, Metals amp; Materials Society(TMS) Proceedings vol.2; 20040926-29; New Orleans,LA(US) >Process Modeling for Rotary Tube Piercing Application
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Process Modeling for Rotary Tube Piercing Application

机译：旋转管穿孔应用的过程建模

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摘要

The rotary piercing of a solid bar into a seamless tube, also known as the Mannesmann process, is a very fast rolling process. In the process, the preheated billet is cross rolled between two barrel-shaped rolls at a high speed. To study the rotary piercing process, the Finite Element Method (FEM) based commercial code DEFORM was used. The updated Lagrangian approach was first used in the investigation. Due to the dominated rotational velocity field, the time step size is limited to a small value and the whole part must be modeled for better solution accuracy. It therefore increases the computing effort. To reduce the computation time, a new method with the Eulerian approach was developed. The geometry updating is carried out in the feeding direction while the nodal coordinates in the hoop direction remains unchanged. With this approach and the rotational symmetry treatment, only half of the model is simulated due to the symmetry condition. This paper summarizes the overall methodologies. A tube piercing example was presented to demonstrate the numerical techniques. Excellent agreement between the finite element predictions and actual part shapes was observed. This approach can also be used for other similar processes with rolls and rotating workpiece.
机译：将实心棒旋转穿孔到无缝管中，也称为Mannesmann工艺，是一种非常快速的轧制过程。在此过程中，预热的坯料在两个桶形辊之间高速交叉轧制。为了研究旋转穿孔过程，使用了基于有限元方法（FEM）的商业代码DEFORM。在调查中首先使用了更新的拉格朗日方法。由于占主导地位的转速场，时间步长被限制为一个较小的值，并且必须对整个零件进行建模以提高求解精度。因此，这增加了计算量。为了减少计算时间，开发了一种采用欧拉方法的新方法。在进给方向上执行几何更新，而在环向上的节点坐标保持不变。使用这种方法和旋转对称性处理，由于对称性条件，仅模拟了一半模型。本文总结了总体方法。给出了一个穿孔实例，以演示数值技术。观察到有限元预测与实际零件形状之间的极佳一致性。这种方法也可用于带有辊和旋转工件的其他类似过程。

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