重型卡车横梁的铸造工艺

Casing Process of Heavy Duty Truck Beam Casting

介绍了一种重型汽车用铸造横梁的铸造生产工艺,采用粘土砂静压造型线造型,覆膜砂热芯制芯;铸件结构为薄壁壳体类铸件,在车架安装部位、V型推力杆装配连接部位存在局部多处孤立热节,气孔、缩孔的风险较高;应用MAGMA软件对铸造的充型、补缩工艺设计进行模拟分析计算,通过对充型温度场、粒子追踪模拟来判断现有气孔、冷隔、夹渣等缺陷的风险概率,通过残余液相和缩松判据分析现有工艺产生收缩缺陷的风险概率,综合充型、凝固过程的模拟结果,对原有工艺进行优化并试制,最终获得了合格铸件。

For This paper introduces a kind of casting process for heavy duty truck casting beam,which is made of green sand by high pressure molding line,making core with coated sand.The casting is thin-walled shell castings.There are several local isolated hot spots in the mounting part of the frame and the assembly connection part of the V-shaped stinger,and the risk of porosity and shrinkage cavity is high.Using MAGMA software for flling and feeding of casting process,based on the flling temperature field,the particle tracking simulation to determine the existing risk of defects such as porosity,cold shut,slag inclusion,through the analysis of the fraction liquid and shrinkage criterion to judge the risk probability of causing shrinkage defects,integrated simulation result of flling and solidification process,optimize the original design and trial-manufacture model,finally obtained the qualified castings.