基于压射速度调控金属流动减少铝制9AT壳体缺陷工艺研究  

Research and Development of Process for Reducing Defects in Aluminum 9AT Shells Based on Injection Velocity Control of Metal Flow

作　　者：许延琛 李亨[1,2] 鲁超 滕兴宇 唐丽 吴玉程 XU Yanchen;LI Heng;LU Chao;TENG Xingyu;TANG Li;WU Yucheng(Anhui Key Laboratory of Aeronautical Structural Parts Forming,Manufacturing and Equipment,Hefei University of Technology,Hefei 230000,China;Jiangnan Light Alloy New Material Industry Research Institute,Chizhou 247100,China;Hefei Yaming Auto Parts Co.,Ltd.,Hefei 230000,China;Wuhu Ruihu Lightweight Technology Co.,Ltd.,Wuhu 241000,China;Anhui Huanxin Group Co.,Ltd.,Anqing 246001,China)

机构地区：[1]合肥工业大学航空结构件成形制造与装备安徽省重点实验室,安徽合肥230000 [2]江南轻合金新材料产业研究院,安徽池州247100 [3]合肥亚明汽车部件有限公司,安徽合肥230000 [4]芜湖瑞鹄轻量化技术有限公司,安徽芜湖241000 [5]安徽环新集团股份有限公司,安徽安庆246001

出　　处：《铸造技术》2023年第9期855-860,共6页Foundry Technology

基　　金：安徽省发改委创新工程项目(JZ2022AFKJO032);中央高校基本科研业务费专项资金(JZ2021HGTB0100,PA2020GDSK0076)。

摘　　要：9AT汽车变速器离壳体油路管道、加强筋等复杂结构集中于右侧,对称性差,气密性要求高,导致成型难度大,生产合格率较低。压射速度是影响产品合格率的关键因素,本文通过计算确定了工艺参数并模拟了3组不同流速对金属液流动和缺陷率的影响。结果表明,当浇注温度为680℃、压射速度为3.5 m/s、模具温度为200℃时流速最为平缓,产生的缩松缩孔体积最小。用该组工艺参数进行压铸实验,并对铸件进行组织形貌观察和性能测试,其抗拉强度和伸长率分别为257.3 MPa、4%。变速器离壳体产品性能和质量满足使用要求,产品合格率由原来的65.3%提高到77.5%。Complex structures such as the oil pipeline and reinforcing ribs from the case of 9AT automobile transmission are concentrated on the right side,resulting in poor symmetry and high requirements for airtightness,which lead to great molding difficulties and low production qualification rates.The injection velocity is a key factor affecting the product qualification rate.In this paper,the process parameters were determined through calculation,and the effects of three different flow rates on the metal liquid flow and defect rate were simulated.The results show that when the pouring temperature is 680℃,the injection speed is 3.5 m/s,and the mold temperature is 200℃,the flow rate is the gentlest,creating the smallest volume of shrinkage porosity and shrinkage cavity.Die casting experiments were carried out with this set of parameters,the microstructure and morphology of the castings were observed,and performance tests were conducted.The tensile strength and elongation are 257.3 MPa and 4%,respectively.The performance and quality of the transmission case product meet the use requirements,and the qualified rate of the products increases from 65.3%to 77.5%.

关 键 词：压铸 压射速度 数值模拟 变速器离壳体 

分 类 号：TG146[一般工业技术—材料科学与工程]