An optimization method of gating system for impeller by RSM and simulation in investment casting
An optimization method of gating system for impeller by RSM and simulation in investment casting
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熔模铸造叶轮浇注系统的RSM与模拟优化方法
DOI：
10.1007/s00170-018-2474-z
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发表时间：
2018-10-01
影响因子：
3.4
通讯作者：
Sun, Baode
中科院分区：
文献类型：
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作者：
Wang, Donghong;Sun, Jinyu;Sun, Baode
浇注系统的设计在整个铸造工艺设计中占有非常重要的比重。在熔模铸造中，铸件凝固模拟是一种替代迭代试错法设计浇注系统的确定性方法。然而，工程师的经验和知识对获得最优解的有效性有重要影响。本文的目的是得到一个优化的浇注系统，以减少隔水管的尺寸，并具有安全余量设计，在叶轮中没有缩孔和气孔。采用3个实验因素和2个最优目标，建立Box-Behnken设计（BBD）。对开式叶轮进行浇注系统直径、浇注系统高度和浇注温度试验。指标包括缩孔体积和缩孔到铸件的距离。结果表明：立管直径对缩孔体积和缩孔位置的影响最为明显；结果表明，与模量法得到的冒口相比，优化后的冒口效果更为明显，浇注系统体积减小了47.85%，铸件成品率提高了15.02%。通过物理实验对仿真结果进行了验证，结果与实验值吻合较好。
The design of gating system occupies a very important proportion in the design of the entire casting process. Casting solidification simulation is being a deterministic approach replacing the iterative trial and error method to design gating system in investment casting. However, the experience and knowledge of the engineer have an important impact on the effectiveness to achieving an optimal solution. The purpose of this paper is to get an optimized gating system to decreasing the size of the riser with a safety margin design with no shrinkage cavities and porosities in the impeller. The Box-Behnken Design (BBD) was prepared with three experimental factors and two optimal targets. The experimental factors involved gating system diameter, gating system height, and pouring temperature for open impeller. The targets included volume of shrinkage porosity and distance from shrinkage porosity to casting. The results indicated that the diameter of the riser has the most obvious impact on the volume and position of the shrinkage porosity. Compared with the riser obtained by the modulus method, the results show that the effect of riser optimization is more obvious, the volume of gating system is reduced by 47.85%, and the casting yield is increased by 15.02%. The physical experiments were performed to verify the simulation results, and good agreement between experimental values.