结构突变壳体构件倾转铸造充型模拟研究  

Numerical Simulation on Filling of Tilting Casting of Structural Mutation Shell Component

作　　者：茄菊红 宋和谦 纪旭辉 曹福洋[2,3] 张伦勇 孙剑飞[2,3] QIE Juhong;SONG Heqian;JI Xuhui;CAO Fuyang;ZHANG Lunyong;SUN Jianfei(AECC Xi'an Engine Control Technology Co.,Ltd.,Xi'an 710077,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中国航发西安动力控制科技有限公司,陕西西安710077 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [3]哈尔滨工业大学金属精密热加工国家级重点实验室,黑龙江哈尔滨150001 [4]中北大学材料科学与工程学院,山西太原030051

出　　处：《热加工工艺》2024年第23期122-129,共8页Hot Working Technology

基　　金：中国航发西安动力控制科技有限公司技术开发项目(MH2020200558);金属精密热加工国家级重点实验室基金项目(JZKJW20220018-05)。

摘　　要：以铝合金油泵壳体铸件深井位置的充型过程为研究对象,运用流体计算软件Fluent,采用自定义程序的方法,研究不同形状参数下倾转浇注过程中合金液流前沿的形态,揭示规律性氧化膜缺陷的形成原因。结果表明:增大铸件深井结构与浇口杯之间的距离造成金属液流速增大,形成涡流,造成卷气和氧化膜缺陷;结构设计时应保证深井前流道长度与深井深度呈反比关系,减小切割角,增大深井后流道高度,从而抑制紊流,减轻卷气和氧化膜缺陷的产生。该结论通过水模拟实验得到充分验证。Taking filling process of aluminum alloy oil pump shell casting in a deep well position as the research object,the fluid calculation software Fluent and the user-defined function(UDF)method were used to study the morphology of the alloy liquid flow front during the filling process under different geometric parameters,the reasons for the formation of regular oxide film defects were revealed.The results show that increasing the distance between the well and the filling gate makes the flow speed increase,it causes vortexes and turbulence,and the defects such as gas entrapment and oxide film are formed.During the structure design process,it should be ensured that the length of the flow channel before the deep well is inversely proportional to the depth of the deep well,reducing the cutting angle and increasing the height of the flow channel after the deep well,so the turbulence is suppressed,the formation of air entrainment and oxide film defects is reduced.The conclusion has been fully verified by water simulation experiments.

关 键 词：薄壁铸件 倾转铸造 数值模拟 流场分析 

分 类 号：TG244[金属学及工艺—铸造] TG249.9