摘要
针对铝合金汽车制动油缸铸件在生产实际中的夹渣缺陷,在夹渣聚合长大模型(PAGM,Particles Aggregation Growth Model)的基础上,对铸件的充型及凝固过程进行了数值模拟,分析了铸件夹渣缺陷的形成原因,并提出了改进方案。分析结果表明,使用PAGM进行模拟后,发现夹渣缺陷分布预测与实际生产统计结果一致,且夹渣缺陷产生的主要原因是浇注温度较低、充型速度过快。改进方案通过提高浇注温度、降低浇注速度、采用卧式浇注系统和改变内浇口位置的方式进行浇注工艺和模具结构的优化,模拟分析结果显示可以有效地消除关键部位的夹渣缺陷。应用PAGM进行铸造仿真能有效地预测铸造过程中的夹渣分布,为优化铸造工艺和减少夹渣缺陷提供了参考。
Aiming at the slag inclusion defects in aluminum alloy automobile brake cylinder casting,the filling and solidification process of the casting were simulated based on the Particles Aggregation Growth Model(PAGM),and the causes of slag inclusion defects were analyzed,and the improvement schemes were put forward.The results show that the distribution of slag inclusion defects predicted by PAGM is consistent with the actual production statistics,and the main reason of slag inclusion defects is that the pouring temperature is lower and the filling speed is too fast.By raising the pouring temperature,reducing the pouring speed,adopting the horizontal pouring system or changing the position of the inner gate to optimize the pouring process and mould structure,the simulation results show that the inclusion defects in the key parts can be effectively eliminated.The application of PAGM in casting simulation can effectively predict the distribution of slag inclusion in the casting process,which provides a reference for optimizing casting process and reducing slag inclusion defects.
作者
汪双君
汪红兴
陈应航
徐磊
WANG Shuangjun;WANG Hongxing;CHEN Yinghang;XU Lei(College of Mechanical and Vehicle Engineering,Bengbu University,Bengbu 233030,China;Anhui Jingke Energy Co.,Ltd.,Process Department,Hefei 231600,China)
出处
《武汉轻工大学学报》
CAS
2023年第4期87-94,105,共9页
Journal of Wuhan Polytechnic University
基金
安徽省教育厅高校科研项目(2022AH051922)
蚌埠学院校级自然科学研究重点项目(2021ZR01zd)。
关键词
制动油缸
夹渣缺陷
聚合长大
数值模拟
brake cylinder
slag inclusion defect
aggregation growth
numerical simulation
