摘要
轧环机下箱体，材质HT250，重9500kg，轮廓尺寸4100mm×2500mm×577mm，干砂型，冲天炉熔炼。运用均衡凝固模数法设计补缩式顶注雨淋浇注系统，以大孔出流作充填校核。采用2个浇包同时浇注，2套独立对称的浇注系统，设计结果为：直浇道φ80mm，横浇道56／60mm×50mm，18只内浇道φ18mm，浇注温度1320-1380℃。浇注出的铸件形状完整，机加后没有缩孔、缩松、夹渣、气孔等缺陷，工艺出品率93％。表明均衡凝固模数法设计补缩式浇注系统是实用的。
The case of ring rolling mill is made of HT 250, the total weight is 9 500 kg, and the overall dimensions are 4 100 mm in length, 2 500 mm in width and 577 in height. The mould is made using dry clay bonded sand and the as-cast iron is melted in cupola. The top shower gating system is designed using proportional solidification modulus calculation method and its feeding ability of the gating system is checked though the large orifice discharge. The two dependent and symmetrical gating system are adopted and poured by two ladles at the same time. The designed results are as follows： a sprue with a size of 80 mm diameter, a runner with a size of 56/60 mm × 50 mm, 18 ingates with a size of 18 mm diameter, and the 1 320- 1 380 ℃ pouring temperature. The castings after machining show that there are no shrinkages, porosity, slag inclusions and blowholes. The overall yield rate is 93%. It is indicated that it is a practical method to design feeding and gating system using proportional solidification modulus calculation method.
出处
《铸造技术》
CAS
北大核心
2007年第3期299-301,共3页
Foundry Technology
关键词
箱体铸铁件
模数法
浇注系统补缩设计
Gray cast iron casting of case type
Moduli calculation method
Design of gating and feeding system
