汽车发动机缸体内腔质量影响因素分析及工艺控制

Analysis of Influencing Factors and Process Control of Inner Cavity Quality of Automobile Engine Cylinder Block

随着汽车轻量化的发展,发动机缸体壁厚要求越来越薄。针对水套内腔质量的影响因素进行了分析和工艺改善;介绍了烧结陶瓷砂、纤维素和铬尖晶石用于硅砂制芯添加对砂芯高温和常温特性以及产品质量的影响;指出涂料的热暴、热膨胀和烧结性对产品内腔质量影响以及涂料粉料的作用机理;运用射砂模拟技术对砂芯致密性进行了分析和质量改善。

With the development of automobile lightweight,the wall thickness requirement of engine inner cavity is getting smaller and smaller.The influencing factors of inner cavity quality were analyzed and the process was improved.The effects of adding sintered ceramic sand,cellulose and chromium spinel to silica sand core on the high temperature and normal temperature characteristics of sand core and product quality were introduced.The effects of thermal explosion,thermal expansion and sintering properties of the coating on the quality of the inner cavity and the mechanism of powder action were pointed out.The sand shooting simulation technology was used to analyze the density of the sand core and improve the quality of the inner cavity.