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要想获得精度高、光度和内在质量好的叶轮铸件,在进行铸件工艺设计前,必须对叶轮结构的特点(包括尺寸、重量、壁厚和形状复杂程度等),合金种类,制壳工艺等进行综合考虑。尤以叶轮的结构最为重要。 一、叶轮结构特点及其对铸件质量的影响 叶轮的结构对铸件质量的影响有以下几个方面: 1.叶轮的轮毂部位较厚大,如果热节未引出,补缩不够,会造成轴孔部位在加工后出现缩孔和缩松。
To obtain high precision, good luminosity and good inherent quality impeller castings, the characteristics of the impeller structure (including size, weight, wall thickness and shape complexity, etc.), alloy type, shell making process, etc. To consider. Especially the structure of the impeller is most important. First, the structure of the impeller and its impact on the quality of the casting The quality of the impact of the structure of the impeller in the following areas: 1. The hub of the impeller thicker, if the heat is not drawn, not enough, will result in shaft hole After the site shrinkage and shrinkage after processing.