锻压技术

Ф550mm行车轮模锻件分模面裂纹分析

英文标题：Parting face crack analysis of traveling crane wheel drop forgings of Φ550 mm

作者：程里龚超

单位：重庆工学院材料科学与工程学院重庆重型铸锻厂锻造分厂重庆400050 重庆400083

关键词：模锻件分模面裂纹锻造错移切边

分类号：TG316

出版年,卷(期):页码：2008,33(1):24-26

摘要：

在16 t热模锻锤上锻造一批(150件)直径为Ф550 mm的行车轮时,有近3/4的锻件沿切边带出现开口分模面裂纹,并产生飞边残留及翘曲不平的叠饼状飞边。经过破裂特征分析、锻造工序追溯及模锻件分模面结构分析后发现:由于在始锻时发现模膛存在严重磨损拉痕,即在锤上进行型腔打磨,造成锻造上下模型腔错移,从而导致锻件沿分模面错移,切边宽度过大,切边凹模施加的极大的垂直力和水平力产生的合力致使切边时行车轮沿分模面向内严重撕裂。

Three quarter die forgings were broken along parting line among 150 forgings of Ф550mm traveling crane wheels forged on drop hammer of 16t.The warp flash was produced and some of them were remained after trimming.The forging procedure tracing and parting face structure analyzing were performed.The result shows that wheel breaking along parting line is caused by trimming flash.Forging offset causes error repairing pattern.The main reason is the impression offset in forging which causes bigger trimming width and force.

基金项目：

参考文献：

[1]锻件质量分析编写组.锻件质量分析[M].北京:机械工业出版社,1983.
[2]王仲仁.锻压手册(锻造第3卷)[M].北京:机械工业出版社,2002.
[3]吕炎.锻造缺陷分析与对策[M].北京:机械工业出版社,1999.
[4]吕炎.锻造工艺学[M].北京:机械工业出版社,1995.
[5]万煦义.提高大中型柴油机连杆模锻件质量的途径[J].锻压技术,2006,31(3):4-8.

服务与反馈：

【文章下载】【加入收藏】