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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。
The elastic-plastic theory was used to establish the mechanical analysis model of the relationship between the steel pipe and the die. The dynamic simulation of the entire pipe drawing process was carried out, and the dynamic changing process of the drawing force was obtained. According to the variation rule of drawing force, the drawing process is divided into three stages: starting, flowing and stabilizing. The relationship between drawing temperature and drawing force is studied. Theoretical analysis and finite element calculation results show that drawing process Temperature can significantly reduce the pulling force and improve the working capacity of the drawing equipment. The established pulling force analysis model is better than the actual use of the experiment and production to achieve a better match, to optimize the mold structure and drawing process design Provide evidence.