摘要
以薄壁支架为研究对象,根据其结构特点及质量要求,设计了薄壁铝合金支架砂型铸造工艺方案,利用数值模拟软件对铸造工艺的充型及凝固过程进行模拟。结果发现,由于支架壁厚较薄,无法完全充满铸型,凝固过程中出现大量缩孔、缩松缺陷。分析了缺陷产生的原因,进一步优化浇注系统,并合理选择冒口和冷铁安放位置,设计腰圆形冒口与冷铁尺寸,再次进行数值模拟。结果表明,优化后铸造工艺能较好地消除铸造缺陷,生产出合格铸件。
According to thin-walled bracket structural characteristics and quality requirement,the design of sand casting process for the thin-walled aluminum alloy bracket was carried out.The View Cast software was used for the filling and solidification process.The simulated results show that a large number of shrinkage cavity and shrinkage defects appear in the solidification process as a result of the failure to completely fill the mold because of the thin wall thickness of the bracket.Origination of the defects was described,and the gating system was optimized.Through selecting the position of the riser and the cold iron,designing the size of the riser and the cold iron,the simulated results reveal that the optimized casting process can eliminate the casting defects and meet the requirement of the casting production.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2017年第5期561-564,共4页
Special Casting & Nonferrous Alloys
基金
河南省高等学校重点科研项目(16A450002)
河南理工大学校内基金资助项目(B2016-007)
关键词
铝合金支架
数值模拟
铸造缺陷
工艺优化
Aluminum Alloy Bracket
Numerical Simulation
Casting Defects
Process Optimization
