镁合金变速箱罩体压铸充型过程模拟与优化  

Simulation and Optimization of Die Casting Magnesium Alloy Automobile Gearbox Cover during Filling Process

作　　者：王向杰[1] 逯志浩[2] 

机构地区：[1]湖北理工学院机电工程学院 [2]东风汽车集团股份有限公司技术中心

出　　处：《特种铸造及有色合金》2014年第12期1272-1275,共4页Special Casting & Nonferrous Alloys

基　　金：湖北省教育厅科学技术研究资助项目(B2014032);湖北理工学院湖北省重点学科"机械工程"资助项目(T201408)

摘　　要：介绍了某汽车新型变速箱壳体的结构特点及工艺要求,运用华铸CAE软件对镁合金变速箱罩体的压铸充型过程进行了模拟与工艺优化。通过修改铸件的分型面,调整浇口总截面积大小、浇口数量及各浇口截面积的大小比例,以及根据分析结果合理安排排溢系统的位置,可明显改善原有工艺方案中的卷气、充型不平稳、铸件内部存在纵向低温区以及氧化夹杂等缺陷。The structural characteristics and process requirements of a new gearbox housing were de- scribed, and filling process of the magnesium alloy gearbox cover was simulated and optimized by the CAE technology. By modifying the casting parting face, adjusting total cross-sectional area of the gate, the number of gates and the gate cross-sectional area of the size ratio, as well as reasonable arrange- ments for the position of overflow system based on the result analysis, defects such as gas-entrappment, unstable filling and longitudinal low temperature zone as well as un-reasonable oxide inclusion distribu- tion in the housing, can be eliminated greatly.

关 键 词：镁合金 变速箱壳体 压铸 充型工艺优化 

分 类 号：TG249.2[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]