基于AnyCasting的大型机床床身铸造温度场模拟研究

Study on Simulation of Casting Temperature Field of Large-scale Machine Tool Body Based on AnyCasting

使用Any Casting铸造模拟软件对不同浇注温度的HT300灰铸铁大型机床床身铸造过程的温度场进行了模拟。结果表明,铸造过程中金属液温度沿流动方向逐渐降低,最低温度位于中间部位,最高温度位于两侧浇口附近;随着浇注温度提高,相同充型时间内高温区域扩大,金属液凝固率下降,充型结束时浇冒口温度提高,有助于补缩和铸件的顺序凝固。在两种浇注温度条件下最先发生凝固的部位基本一致,最终凝固部位略有差异;随着浇注温度提高,凝固时间逐渐延长,但温度达到1385℃以上时,继续提高浇注温度对于凝固时间的影响较小。

The temperature field of different pouring temperatures of HT300 large-scale machine tool body during casting process was simulated by using AnyCasting software. The results show that the liquid metal temperature decreases gradually along the flow direction during casting process, the minimum temperature is located in the middle, and the highest temperature is located near the gate of both sides. With the increase of pouting temperature, the high temperature region expands, the solidification rate of molten metal decreases in the same filling time, and the riser temperature increases at the end of filling, which is helpful to feeding and sequential solidification of casting. The primary solidification positions are almost the same while the final solidification positions are slightly different under the two pouring temperatures. With the increase of pouring temperature, the solidification time extends gradually. However, when the temperature is above 1385℃, the effect of pouring temperature on the solidification time is small.