后罩支座铸件的铸造工艺优化

Casting Process Optimization of Rear Cover Brackets Casting

介绍了后罩支座铸件的结构及技术要求,详细阐述了生产初期出现的内浇道内部冲砂及铸件缩孔、缩松缺陷。通过运用MAGMA数值模拟软件对浇注系统进行模拟优化,对浇注系统进行相应更改,并对生产过程进行严格控制,成功解决了浇注系统的冲砂缺陷和铸件的缩孔、缩松问题。最后指出:(1)应用MAGMA数值模拟软件对后罩支座铸件的工艺方案进行模拟优化,可以克服工艺优化的盲目性。(2)在冷冒口顶部增加发热冒口套,利用氧化反应产生的热能来加热冒口,可以增加冒口的补缩效果,解决冷冒口补缩不稳定问题。

The structure and technical requirements of the back cover brackets casting were introduced.The defects of sand punching at inner sprue,shrinkage and porosity that appear in the initial stage of production were elaborated in detail.By using MAGMA numerical simulation software to simulate and optimize the gating system,corresponding changes to the gating system were made,and the production process was strictly controlled.The problems of sand punching defects in the gating system and shrinkage and porosity of castings have been successfully solved.Finally,it was pointed out that:(1)The application of MAGMA numerical simulation software to simulate and optimize the process scheme of rear cover brackets castings could overcome the blindness of process optimization.(2)Add a heating riser on the top of the cold riser,and use the heat energy generated by the oxidation reaction to heat the riser,could increase the feeding effect of the riser and solve the problem of unstable feeding of the cold riser.