铸造旧砂振动再生的离散元法模拟  

Simulation of Discrete Element Method for Vibration Type Reclamation of Casting Used Sand

作　　者：张希俊[1] 武智猛[1] 张方[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2013年第13期44-47,共4页Hot Working Technology

基　　金：国家自然基金资助项目(50665004)

摘　　要：应用离散单元法模拟铸造旧砂在振动再生过程中的运动和受力状态。以边界功表示砂粒受到的正向挤压作用,摩擦功表示砂粒间的相互摩擦,模拟计算了多个因素对旧砂振动再生的影响。结果表明:采用多边形筒体、设置中心筒体、提高振动频率和振幅以及在砂中加入介质,可提高旧砂再生的效果。在模拟基础上进行了实际的振动再生试验。研究结果有利于指导设计振动再生机和优化振动再生工艺。The movement and force state of casting used sand in vibration type reclamation were simulated by distinct element method （DEM. The boundary work was shown by forward squeezing and the frictional work was shown by frictional interaction between sands. The influence of the several factors on the process of vabration type reclamation was simulated. The simulation results indicate that the effect of reclamation of used sand can be improved by using polygon cylinder, setting central cylinder, raising the fi＇equency and amplitude of vibration and putting medium in sand. On the basis of these, the actual vibration regeneration tests are done. The results of experiment are of help to design vibration regeneration machine and optimize technical processes.

关 键 词：离散元法 铸造旧砂 振动再生 数值模拟 

分 类 号：TG231.5[金属学及工艺—铸造]