摘要
采用数值模拟方法预测了刮板输送机铲板槽帮铸件的缩孔位置和在侧板底部产生的凸起变形,通过凝固温度场和温度梯度分析了铸件变形原因。研究表明,当温度场在同一水平位置上相当、温度梯度较小时,铸件的变形量最小。并根据变形机理及铸件结构对铲板槽帮铸件的原铸造工艺进行了改进,改进了浇注系统、冒口和冷铁工艺,按改进后的工艺生产出来的铲板槽帮铸件达到了技术要求。
In the paper, through numerical simulation, the locations of shrinkage defects and the convex deformation at both ends of the side plate of the rump pan for scraper conveyors were investigated. By analyzing the solidification temperature field and the temperature gradient, the reasons for the casting deformation were discussed in details. The research results indicate that when the temperature field at the same height of the casting is similar and the temperature gradient is small, the deformation of the casting will be minimal. Based on the mechanism of deformation and the structure of the casting itself, the original foundry process design of the rump pan was improved, including the gating system, risers and chills. According to the improved foundry process design, the rump pan castings were produced, meet the technical requirements of the casting.
出处
《铸造》
CAS
CSCD
北大核心
2016年第2期188-192,共5页
Foundry
基金
沈阳市科技计划项目(F13-036-2-00
F12-267-4-00)
关键词
铲板槽帮
变形
数值模拟
温度梯度
工艺改进
rump pan
deformation
numerical simulation
temperature gradient
process improvement
