铸钢连杆小头铸造缺陷分析及工艺改进

Defect Analysis and Process Improvement Research at Small Head Cast of Connecting Rod in Casting Steel

针对连杆小头铸钢件铸造时出现缩孔缺陷,将原立浇单个冒口工艺改为卧浇,并采用比例法设计了3个补缩冒口。生产结果,铸件在超声波检查时无一因存在缩孔而致废,铸件合格率95%以上,铸造工艺出品率为59%。

In view of casting steel of connectingm rod to small head having the shrink hole flaw when casting,the single rising head craft of the erectness cast is originally changed as the lying cast,and using the ratio method three sink heads are designed.Production result has showed that casting when ultrasonic wave inspection does not have one to send waste because of having the shrink hole.The qualified rate of casting is above 95%,and the casting technique product rate is 59%.