车用涡轮增压器壳体浇注系统设计

Design of Gating System for Auto Turbocharger Housing

为了满足一型多件的要求,并验证常见的浇注设计理论对小型钢铸件的有效性,采用3种浇注系统设计理论即铸造技术手册中提供的公式,Ozan公式和大孔口出流理论设计了截面形状相似、尺寸不同的浇注系统,并用Magmasoft进行了模拟。模拟结果表明,采用大孔口出流理论设计的浇注系统效果较好,并投入生产。生产结果表明,采用1.2∶0.9∶1.0的直浇道、横浇道、内浇道横截面积比,可获得质量良好的铸件,废品率降低,型板成品率提高8%。

To meet the requirements of making multiple castings in one mold and verify the effectiveness of common gating design theories for small steel casting,three gating systems with similar section shapes and different sizes were designed with using the three common gating design theories(formula provided in the Foundry Technology Manual,Ozan Formula and Large Orifice Outflow Theory)and simulated by Magmasoft.The simulated results showed that the gating system designed using Large Orifice Outflow Theory is better and was put into production.Production results showed that using cross section area ratio of sprue,runner and ingates at 1.2∶0.9∶1.0,good quality castings are obtained,scrap rate is reduced,and pattern yield is increased by 8%.