摘要
以某重型商用车平衡轴支架为研究对象,根据平衡轴支架的结构特点与质量要求,初步设计了平衡轴支架的铁型覆砂铸造工艺方案并进行样件试制。样件剖切结果发现在平衡轴根部厚大区域出现了较为严重的缩孔缩松缺陷。利用AnyCasting软件对平衡轴支架铸件的充型与凝固过程进行模拟仿真,仿真结果预测的铸件缩孔缩松位置与实际情况相一致。基于平衡轴支架充型与凝固过程及铸件缺陷产生原因的分析,对初始铸造工艺方案进行优化。优化后的仿真结果显示平衡轴支架铸件的缩孔缩松缺陷已基本消除。根据优化后的铸造工艺方案再次进行样件试制,样件剖切结果表明原平衡轴根部厚大区域的缩孔缩松缺陷已完全消除,平衡轴支架铸件内部质量满足要求。
Taking the balance shaft bracket of a heavy commercial vehicle as the research object,based on the structural characteristics and quality requirements of the balance shaft bracket,the sand-lined metal mold casting process scheme of the balance shaft bracket was preliminarily designed and the sample was trial produced.The cutting results of the sample revealed severe shrinkage and porosity defects in the thick area at the root of the balance shaft.The filling and solidification process of the balance shaft bracket casting was simulated using AnyCasting software,and the predicted shrinkage and porosity positions of the casting were consistent with the actual situation.Based on the analysis of the filling and solidification process of the balance shaft bracket and the causes of casting defects,the initial casting process scheme was optimized.The simulation results of the optimized process scheme showed that the shrinkage and porosity defects of the balance shaft bracket casting have been basically eliminated.According to the optimized casting process scheme,a trial production of the sample was conducted again.The cutting results of the sample showed that the shrinkage and porosity defects in the thick area at the root of the original balance shaft have been completely eliminated,and the internal quality of the balance shaft bracket casting met the requirements.
作者
白红
冀元贵
罗铖
吴孟武
BAI Hong;JI Yuan-gui;LUO Cheng;WU Meng-wu(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,Hubei,China;Hubei Xingyuan Technology Co.,Ltd.,Shiyan 442000,Hubei,China;Hubei Longzhong Laboratory,Xiangyang 441022,Hubei,China)
出处
《铸造》
CAS
2024年第3期396-402,共7页
Foundry
基金
湖北省重点研发计划资助项目(2021BAA048)
湖北省重点研发计划资助项目(2022BAD100)。
关键词
平衡轴支架
铁型覆砂铸造
数值模拟
工艺优化
balance shaft bracket
sand-lined metal mold casting process
numerical simulation
process optimization
