管道压铸件的风冷工艺设计与仿真

Design and Simulation of Air Cooling Process of Pipe Die Casting

为了缩短管道压铸件冷却时间,实现快速高效冷却方案的制定,对风冷工艺进行了研究。基于k-epsilon湍流模型,利用Fluent软件模拟仿真了压铸件在冷却输送机上强制风冷时温度变化的情况,分析了风机的不同工位对冷却效果的影响。分析表明,当铝合金压铸件初始温度为400℃时,工件的温度在0-100 s内下降趋势明显,降幅为300℃;100-300 s内下降趋势缓慢,降幅为80℃;当风机出风口与工件的距离为300 mm、风机偏角为20°时,冷却效果最佳,在300 s内可将工件冷却至20℃左右。

In order to shorten the pipe die casting cooling time, and to realize rapid and efficient cooling solutions, the mechanism of air cooling is studied. Using Fluent software, based on k-epsilon turbulence model, temperature changes of the die casting on the air-cooled experimental bench forced air cooling is simulated and the cooling effect of different location of the fan is analyzed. The analysis result shows that when the initial temperature of the aluminum alloy die casting is 400 ℃, the temperature of the workpiece declines significantly within 0~100 s, decreased by 300 ℃; the temperature declines gradually within 100~300 s, decreased by 80 ℃; When the distance is 350 mm between the workpiece and outlet of the fan, and the angle is 20°, cooling effect is the best, and it can be cooled to 20 ℃ in 300 s.