雨淋式浇注系统在活塞生产中的应用  

Application of Spray Gating System on Piston Production

作　　者：史家全[1] 

机构地区：[1]合肥铸锻厂,安徽合肥230022

出　　处：《现代铸铁》2016年第2期36-38,共3页Modern Cast Iron

摘　　要：介绍了油压机活塞的铸件结构及技术要求,详细阐述了该铸件的生产工艺:采用顶雨淋式浇注系统,浇道比为ΣF_直:ΣF_横:ΣF_内=1:3.5:1.3,设置十字旋转横浇道,将铸件中心直浇道和一周环形浇道连接,环形浇道下方均匀分布8个内浇道,在铸件厚大部位的内表面和外表面均布一圈内外互相错开的冷铁。首次试制时,由于砂芯损坏,外侧密封槽根部在加工时发现有缩松存在。通过增加内浇道高度,砂芯再无损坏;通过适当增大冷铁尺寸,铸件缩孔、缩松缺陷也得到了解决。Casting structure and the technical requirements of hydraulic piston machine were introduced. The process of the casting was elaborated. Top spray gating system was used and gating ratios were ΣFpouring:ΣFrunner:ΣFflow=1:3.5:1.3. Set a cross rotation runner and connect the center sprue runner and annular runner. There were 8 ingates even set around the annular runner. Chills were set at the out and inner surface on thick part. At the first time trial,since the sand core damaged,shrinkage were found at the outer seal groove in machining. By increasing the height of the inner runner,sand core got no damage. By appropriately increasing the size of the chill,casting shrinkage,shrinkage defects had been resolved.

关 键 词：球墨铸铁 活塞 雨淋式浇注系统 

分 类 号：TG255[金属学及工艺—铸造]