下箱体铸造工艺设计及数值模拟  

Casting Process Design and Numerical Simulation of Lower Box

作　　者：叶茜 郭莹[1] 孙悦颖 YE Xi, GUO Ying, SUN Yueying(College of Material, Shaanxi University of Technology, Hanzhong 723000, Chin)

机构地区：[1]陕西理工大学材料学院,陕西汉中723000

出　　处：《铸造技术》2018年第4期794-796,799,共4页Foundry Technology

摘　　要：下箱体为球墨铸铁件,在设备运行过程中承受交变的冲击载荷,箱体要求抗压测试,组织致密度要求高;铸件内部空腔较复杂,壁厚不均匀,最大壁厚80 mm,最小壁厚20 mm。对下箱体铸件进行工艺性分析、造型材料选择、浇注系统及砂芯设计等,采用组合砂芯解决内腔较复杂问题,通过在适当位置设置冒口的方法,使铸件均衡凝固,以达到零件致密度要求。设计过程使用UG三维造型软件进行三维建模,运用Pro CAST软件对铸件充型及凝固过程进行数值模拟,根据模拟结果对现有工艺方案进行了优化。The lower box was a nodular cast iron, in the process of running the equipment to withstand the impact of alternating load, the compression testing of box was required, microstructure density requirement was high; the casting cavity was more complex, the wall thickness was uneven, the maximum wall thickness was 80 mm, minimum wall thickness was 20 mm. The process of the lower box casting was analyzed, the selection of the molding material, the gating system and the design of the sand core were used. The composite core was used to solve the complicated problem of the cavity. By setting the riser in the proper position, the part density meted to the requirements. The design process was simulated by UG 3 D modeling software, and the casting process and solidification process were simulated by Pro CAST software. Finally, the existing technological scheme was optimized according to the simulation results.

关 键 词：球墨铸铁 呋喃树脂砂 数值模拟 

分 类 号：TG251[金属学及工艺—铸造]