铸铁缸体水套芯撑熔合不良问题分析及研究

Analysis and Study on the Poor Fusion of Water Jacket Core Chaplet in Cast Iron Cylinder Block

针对某发动机铸铁缸体水套外壁芯撑熔合不良导致缸体漏水问题,分析了芯撑熔合不良的原因,提出了改善芯撑熔合效果的优化方案,经过试验验证,芯撑熔合效果与芯撑窝座的结构大小、浇注时的铁液温度和浇注时间有直接关系。通过控制浇注温度和时间,优化芯撑窝座的结构,保证了缸体水套芯撑和铁液的充分熔合,彻底解决了某发动机缸体水套因芯撑熔合不良导致的漏水问题,提高了发动机的可靠性及品质。

Aimed at the problem of water leakage caused by the improper fusion of core support on the outer wall of the water jacket of an engine cast iron cylinder block,the causes of the improper fusion of core support were analyzed,and an optimization scheme to improve the fusion effect of core support was put forward.The results show that the melting effect of the core brace is directly related to the structure size,casting temperature and casting time of the core brace socket.By controlling the pouring temperature and time,the structure of the core support socket seat is optimized to ensure the full fusion of the cylinder water jacket core support and liquid iron,which completely solves the leakage problem of the engine water jacket caused by the bad fusion of the core support,and improves the reliability and quality of the engine.