QT700-2四缸曲轴铸造工艺数值模拟及其优化  

Casting Method Parameters Simulation and Optimization of QT700-2 Nodular Iron 4-Cylinder Crankshaft

作　　者：刘金林 龚华林 张晓锋 LIU Jin-lin;GONG Hua-lin;ZHANG Xiao-feng(Shanghai Sandmann Foundry Co.,Ltd.,Shanghai 201805,China)

机构地区：[1]上海圣德曼铸造有限公司,上海201805

出　　处：《现代铸铁》2022年第5期9-14,共6页Modern Cast Iron

摘　　要：介绍了QT700-2四缸曲轴的铸件结构及技术要求,初步设计了该铸件在DISA生产线上的铸造工艺,利用MAGMA模拟软件分析铸件的充型过程、凝固过程以及HUB位置的缩孔情况,发现采用传统的圆柱形侧冒口不能消除HUB孔缩孔缺陷,后通过减小冒口颈距离和优化冒口参数且采用矩形侧冒口工艺,有效防止了四缸曲轴HUB孔位置的缩孔缺陷的产生,但是此优化工艺的浇注时间较长,影响生产节拍,通过进一步缩小矩形侧冒口尺寸和质量,缩短了浇注时间,满足了现场生产节拍需求。The casting structure and technical requirements of a QT700-2 nodular iron 4-cylinder crankshaft was introduced,its casting method used for production on DISA line was primarily designed,the mold filling process,solidification process and HUB hole shrinkage were analyzed by using MAGMA simulation software.It was revealed that using traditional cylinder-shaped side riser could not eliminate the HUB hole shrinkage defect,then,by shortening riser neck and optimizing riser parameters and using rectangle side riser casting method,the shrinkage defect in HUB hole location was effectively prevented,however the pouring time of this optimized casting method was too long and affected production beat.By further reducing size and weight of the rectangle side riser,the pouring time was reduced,and in theory,it could meet the field production beat requirements.

关 键 词：球墨铸铁 曲轴 数值模拟 缩孔 

分 类 号：TG255[金属学及工艺—铸造]