【摘要】 连续挤压生产中转速直接决定生产效率，挤压轮转速越高，坯料发生不均匀变形程度越大，变形热也越大，直接影响模具的使用寿命。本文通过对不同转速情况下直径为8 mm黄铜圆棒线材四孔模连续挤压过程的仿真模拟，得到不同转速情况下的温度、速度和等效应力应变分布情况。模拟结果表明：提高挤压轮转速，稳态下坯料的温度和等效应变速率最大值逐渐增大，边缘物料流速小于中心物料的流速，会导致产品边部质量不稳定。通过仿真分析可减少实验次数，大大节约生产成本，同时为多孔模挤压工艺的制定、提升产品质量提供参考。更多还原

【Abstract】 In continuous extrusion production, the rotational speed directly determines the production efficiency. The higher the rotational speed of the extrusion wheel, the greater the degree of uneven deformation of the billet, and the greater the heat of deformation, which directly affects the service life of the mold. This article simulates the continuous extrusion process of 8mm diameter brass round rod wire with four hole die under different rotational speeds. The temperature, velocity, and equivalent stress-strain distribution under different rotational speeds are analyzed. The simulation results show that increasing the rotational speed of the extrusion wheel gradually increases the maximum temperature and equivalent strain rate of the billet in steady state. The flow velocity of the edge material is lower than that of the center material, which can lead to unstable edge quality of the product. At the same time, it provides important basis for the development of porous die extrusion technology and the improvement of product quality. Through simulation analysis, the number of experiments can be reduced, greatly saving production costs.更多还原