摘要
通过采用流体软件在液态和半固态情况下对摩托车发动机外壳进行模拟,得到不同条件下的充型和浆料流动特点,获得合理的模拟凝固时间和保压时间,得出以下结论:(1)相对于传统液态充型铸造方案,采用半固态的充型方案对铸件减少空气卷入的效果明显;(2)采用半凝固充型方案,充型温度较低,可缩短冷却和开模时间,提高生产效率;(3)对于薄壁件和复杂件,半固态的充型速率不一致,易出现冷隔、表面粗糙度下降等问题。
By using fluid software to simulate the liquid state and semi-solid state of the motorbike engine casing,the mold filling and slurry flowing characteristics were obtained,and the reasonable simulation solidification time and pressure holding time were achieved. The following conclusions were obtained:(1)Compared with traditional liquid mold filling scheme,the effect of reducing air involvement was more obvious.(2)By using semi-solidifying mold filling scheme,the mold filling temperature was lower,it was possible to shorten cooling time and mold opening time,improve production efficiency.(3)For thin-walled and complex castings,the filling rate of semi-solid was not consistent,the problems such as cold shut and surface finish quality decline were easy to occur.
作者
刘祥
宁萍
吕国芳
LIU Xiang;NING Ping;LYU Guo-Fang(Chongqing Creation Vocational College,Chongqing 402160,China;Hohai University,Nanjing 210000,China)
出处
《现代铸铁》
CAS
2018年第6期52-57,共6页
Modern Cast Iron
基金
重庆市教委科学技术研究项目--金属丝高频电磁感应熔覆成型3D打印技术研究(项目编号:KJQN201805402)
重庆市永川区自然科学基金项目--纯电动汽车空调系统实训平台的开发与示范应用(项目编号:Ycstc
2018nb0701)
重庆科创职业学院校级科研项目--电动汽车空调系统实训平台的开发与应用
关键词
液态铸造
半固态铸造
模拟分析
liquid state casting
semi-solid state casting
simulation and analysis
