求翻译：本文采用ProCAST软件对大型中空轴件砂型铸造充型及凝固过程进行数值模拟与计算。通过结果研究分析可以获得砂型铸造时合金充型及凝固行为、铸造缺陷形成及分布情况，实现铸件最终质量的预测。本课题研究分析了铸造工艺对充型及凝固过程的影响。研究结果表明：通过利用Procast对该大型中空轴件进行浇注凝固模拟，结果确定了铸件浇注位置及各浇道的设置对铸件缺陷的减少能起到至关重要的作用，冒口位置及大小也对铸件的缩松、缩孔起到良好的改善作用。是什么意思？

In this paper, procast software hollow shaft parts sand mold filling and solidification process of numerical simulation and calculation. Outcomes research can get a sand casting alloy filling and solidification behavior, casting defect formation and distribution of casting the final quality of the f

In this article ProCAST software for large hollow shaft is filled with sand-casting and solidification process with numerical simulation. Through research and analysis results can be obtained at sand-cast alloy and gel-filled, casting defect formation and distribution of quality to achieve the final

ProCAST software in this article on the sand casting of large hollow shaft numerical simulation of mold filling and solidification process and calculate. Sand through a study on the analysis of the results of casting alloys during mo