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为了揭示各种工艺参数和顶头温度场的关系,建立了顶头温度场的数学模型。模型考虑了顶头和钢管内表面之间的摩擦条件、轧辊转速、延伸率、顶头材质等因素对顶头温度场的影响。仿真计算结果指出,在以上各因素条件下,顶头和钢管内表面之间的摩擦条件,材料的某些特性对顶头温度场有很大影响。在材质不变时,实施工艺润滑,可以较显著地提高顶头寿命。计算结果证实,在实施工艺润滑的过程中,存在一个临界摩擦系数f_o,当f≤f_o时,润滑作用显著。本文给出f_o=0.1。
In order to reveal the relationship between various process parameters and head temperature field, a mathematical model of head temperature field was established. The model considers the influence of the friction condition between the head and the inner surface of the steel pipe, the rotational speed of the roll, the elongation, the material of the head on the head temperature field. The simulation results show that under the above conditions, the friction conditions between the head and the inner surface of the steel pipe and some properties of the material have a great influence on the temperature field of the head. In the same material, the implementation of process lubrication, can significantly improve the life of the plug. The calculation results show that there exists a critical friction coefficient f_o in the process of implementing process lubrication, and the lubrication effect is significant when f≤f_o. This article gives f_o = 0.1.