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为得到钢轨万能轧制过程轨头和轨底的精确宽展,以轨头和轨底宽展为待定参数,在坯料断面尺寸、设备参数、轧制工艺参数已知的基础上,基于上限原理推导得出包含轨头和轨底宽展系数的钢轨万能轧制过程总功率表达式,并应用MATLAB软件遗传算法工具箱编写M文件对钢轨万能轧制总功率进行单目标优化,得到轧制功率最小时的轨头和轨底宽展系数。为验证理论模型,对18kg/m轻轨进行万能轧制实验,并用DEFORM软件模拟其万能轧制过程,将优化后宽展系数与实验结果进行对比,两者误差小于2%。
In order to get the exact width of rail head and rail bottom of rail universal rolling process, the parameters of rail head and rail width are to be determined. Based on the known cross section size, equipment parameters and rolling process parameters, The total power expression of rail universal rolling process including rail head and rail width expansion coefficient is deduced and M file is compiled by using MATLAB software genetic algorithm toolbox to optimize the total power of rail universal rolling to get the rolling power The minimum width of the rail head and rail expansion coefficient. In order to validate the theoretical model, a universal rolling test was carried out on a 18kg / m light rail. The universal rolling process was modeled by DEFORM software. The optimized spread ratio was compared with the experimental results. The error between them was less than 2%.