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某型船用柴油机缸盖铸造缺陷分析及解决方法
Analysis and Solution of Casting Defects in the Cylinder Head of a Certain Marine Diesel Engine
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- DOI:
- 作者:
- 高 博1，张 宏2，雷王平2，郑 俊3，王梅东3，闫月须3，杨军军2，田 英2
GAOBo1, ZHANGHong2, LEIWangping2, ZHENG Jun3, WANG Meidong3, YAN Yuexu3, YANGJunjun2, TIAN Ying2
- 作者单位:
- 1. 海军装备部，陕西兴平713102；2.陕西柴油机重工有限公司，陕西兴平713102；3.中核工程咨询有限公司，北京 100073
1. Department of Navy Equipment, Xingping 713102, China; 2. Shaanxi Diesel Engine Heavy Industry Co., Ltd., Xingping 713102, China; 3. China Nuclear Engineering Consulting Co., Ltd., Beijing 100073, China
- 关键词:
- 缸盖；球墨铸铁；薄壁缩松缺陷；孤立热节
cylinder head; nodular iron; thin-walled shrinkage defect; isolated hot spot
- 摘要:
- 目前对于厚大球墨铸件的缩松缺陷研究较多，但缺乏对薄壁处缩松缺陷的研究，特别是复杂架构铸件薄壁 缩松缺陷。 针对本公司某型船用缸盖进排气筒缩松缺陷和弹簧座面夹渣问题，进行缺陷原因分析，并采取相应的 措施进行工艺优化：①通过改进排气孔的冷铁工艺来消除孤立热节；②在弹簧座面增加加工余量，使得渣子充分 上浮从而全部机加去除。通过后续机加结果表明，工艺改进后的缸盖缺陷全部消除，质量得到有效提升，合格率由50% 提升至93%。At present, there is much research on the shrinkage defects of thick and large ductile iron castings. However, less research has focused on shrinkage defects in thin-walled parts, especially in complex structure castings. This paper analyses the cause of the shrinkage defects in the intake and exhaust pipes of a certain type of marine cylinder head and the slag inclusion problem on the spring seat surface of our company. Corresponding measures were taken to optimize the process: ① the isolated hot spots were eliminated by improving the cold iron process of the exhaust hole; ② the machining allowance was added on the spring seat surface so that the slag was fully floated and removed by machining. The subsequent machining results show that all defects in the cylinder head after the process optimization have been eliminated. The quality has been effectively improved, with the qualification rate increasing from 50% to 93%.