采用弹塑性理论建立了钢管与模具之间关系的力学分析模型，动态模拟了钢管的整个拔制过程，得到了拔制力的动态变化过程。根据拔制力的变化规律，将拔制过程分为起始、流动、稳定3个阶段，研究了拔制温度与拔制力之间的关系，理论分析和有限元计算结果说明，提高拔制温度能够明显降低拔制力，提高拔制设备的工作能力，所建立的拔制力分析模型经实验和生产实际使用比较，达到了较好的吻合，可为优化模具结构和进行拔制工艺设计提供依据。
Based upon the principle of the elasticity and plasticity, a mechanical model of the emptysunken steel tube and die is built to simulate the whole process of steel tube drawing mill dynamically by calculating FEM, and the rules of drawing force are developed. Based on the rules of drawing force, drawing process is divided into three stages: start, flow and stable stages. So the relationship of drawing force with drawing temperature is studied, the result of theoretical analysis and calculation of FEM shows that drawing temperature remarkably decreases the drawing force, and increases the equipment capacity of emptysunken steel tube. The predicted result of drawing force model is in good agreement with the experimental result and meets the practical application. The basis is provided for optimal design of die structure and technological design of emptysunken steel tube.
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