基于熵值法的铝合金缸体低压铸造工艺多目标优化  

Multi-Objective Optimization of Low-Pressure Casting Process of Aluminum Alloy Cylinder Block Based on Entropy Method

作　　者：邓伟[1] 宋仲模 雷基林[1] 罗坤 徐远志[2] 张勇 DENG Wei;SONG Zhong-mo;LEI Ji-lin;LUO Kun;XU Yuan-zhi;ZHANG Yong(Yunnan Provincial Key Laboratory of Internal Combustion Engine,Kunming University of Science and Technology,Kunming 650500,Yunnan,China;Kunming Yunnei Power Co.,Ltd,Kunming 650224,Yunnan,China;Chengdu Zhengheng Power Co.,Ltd,Chengdu 610500,Sichuan,China)

机构地区：[1]昆明理工大学云南省内燃机重点实验室,云南昆明650500 [2]昆明云内动力股份有限公司,云南昆明650224 [3]成都正恒动力股份有限公司,四川成都610500

出　　处：《铸造》2024年第6期753-761,共9页Foundry

基　　金：云南省科技厅重大科技专项计划(202202AB080011)。

摘　　要：基于有限元软件ProCAST构建某型铝合金缸体的有限元模型,设计L16(44)正交试验方案,探究了浇注温度、模具预热温度、充型时间、保压压力四个工艺参数对凝固时间和缩松体积的影响。采用熵值法分别计算两个评价指标的权重,将凝固时间与缩松体积转化为综合评分值进行单目标优化。通过极差分析与方差分析,得到了各参数对综合评分的影响程度为:浇注温度(A)>模具预热温度(B)>保压压力(D)>充型时间(C),确定了最优的工艺参数为A1B2C1D3。对比原工艺参数方案和优选工艺参数方案发现:凝固时间缩短了20.35%,缩松体积下降了2.96%。经生产试验,缸体铸件外观质量良好,无明显铸造缺陷,验证了最佳工艺参数的合理性。Based on the finite element software ProCAST to construct the finite element model of a certain type of aluminum alloy cylinder block,the L16(44)orthogonal test scheme was designed,and the influences of four process parameters of pouring temperature,mold preheating temperature,filling time and holding pressure on solidification time and shrinkage volume were explored.The entropy method was used to calculate the weights of the two evaluation indexes,and the solidification time and shrinkage volume were converted into comprehensive scoring values for single-objective optimization.Through range analysis and ANOVA,the influence of each parameter on the comprehensive score was obtained:pouring temperature(A)>mold preheating temperature(B)>holding pressure(D)>filling time(C),and the optimal process parameters were determined as A4B4C4D1.Compared with the original process parameter scheme and the preferred process parameter scheme,it was found that the solidification time shortened by 20.35%,and the shrinkage volume decreased by 2.96%.After the production test,the appearance quality of the cylinder casting was good,and there were no obvious casting defects,which verified the rationality of the optimal process parameters.

关 键 词：铝合金缸体 低压铸造 正交试验 熵值法 多目标优化 

分 类 号：TG24[金属学及工艺—铸造]