前轴承座上半铸件铸造工艺方案设计与模拟优化  

Design and simulation optimization of casting process scheme for upper half casting of front bearing seat

作　　者：杜孙毅 高金桥 蔡嘉楠 杨弋涛[1] DU Sunyi;GAO Jinqiao;CAI Jianan;YANG Yitao(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《中国铸造装备与技术》2024年第1期35-44,共10页China Foundry Machinery & Technology

摘　　要：前轴承座上半属于壳体类构件,两侧对称,但壁厚不均匀,材质为HT250。分析铸件结构特点,制定了分别从轴承座底面和顶面浇入的两种底注式浇注方案,分型面皆在轴承座底面。通过数值模拟对两种方案的温度场、速度场、缺陷等进行分析可知,从轴承座顶面浇入的缺陷较大且不利于消除,故选择从轴承座底面浇入的方案,并对此方案进行优化处理。针对铸造过程中产生的缩凹、缩松、缩孔等缺陷,分别增设了冒口、冷铁并进行优化。最终使铸件中的缺陷几乎全部消除,较大的缺陷均集中在浇注系统中,对铸件无影响。The upper half of the front bearing seat belongs to the shell class member,the two sides are symmetrical,but the wall thickness is uneven,and the material is HT250.The structural characteristics of the casting were analyzed,and two bottom-injection pouring schemes were formulated from the bottom surface and the top surface of the bearing seat respectively,and the parting surface was on the bottom surface of the bearing seat.Through the analysis of the temperature field,velocity field and defects of the two schemes,it can be seen that the defects poured from the top surface of the bearing seat are large and not conducive to elimination,so the scheme poured from the bottom surface of the bearing seat is selected and optimized.In view of the defects such as concave,porosity,and porosity generated during the casting process,risers and cold iron were added and optimized.In the end,almost all the defects in the casting are eliminated,and the larger defects are concentrated in the gating system,which has no impact on the casting.

关 键 词：铸造工艺 灰铁件 浇注系统 冒口 数值模拟 

分 类 号：TG242[金属学及工艺—铸造]