摘要
介绍了EA888油底壳主要缺陷部位及缺陷形式,分析确定了泄漏是由高压油道处有贯穿性的缩孔、疏松而导致的。利用鱼骨图对缩孔产生的根本原因进行分析,排除了工艺参数的影响。通过模具优化,加设局部增压机构和加大型芯点冷却的方案设计,解决了油底壳高压油道处缩孔、缩松缺陷,减少了产品的泄漏废品率。
This article introduced the main defective parts and forms of EA888 oil pan, and analyzed and determined that the leakage was caused by penetrating shrinkages and porosity at the high-pressure oil passage. This article analyzed the root cause of the shrinkages by using fish bone diagram, and found that the process parameter was not relevant in the case. Besides, through the scheme design of die optimization, setting of local pressure boosting mechanism and setting of large core cooling system, the problem of the shrinkages and porosity defects at the high-pressure oil passage of the oil pan was solved and the product reject rate regarding leakage was reduced.
作者
侯丽彬
曲太旭
朱洪军
HOU Li-bin;QU Tai-xu;ZHU Hong-jun(Dalian University of Science and Technology,Dalian 116036,Liaoning,China)
出处
《铸造》
CAS
北大核心
2023年第2期203-206,共4页
Foundry
关键词
高压油道
缩孔
模具
局部增压
点冷却
激冷层
high-pressure oil passage
shrinkage
die
local pressure boosting
point cooling
chilling layer