气力冲击造型试验紧实过程中型砂的应力分析  

Stress Analysis of Green Sand during Experimental Compaction by Air impact Moulding

作　　者：武忠[1] 王祥生[1] 孙国雄[1] 

机构地区：[1]东南大学

出　　处：《铸造》1997年第10期12-15,共4页Foundry

摘　　要：采用气冲造型机并在型砂顶部覆盖铝板的方法，获得了气力冲击造型试验紧实过程中型砂内部的动态应力。分析表明，型砂紧实过程可分为顶部（盖板上方）阶跃载荷的形成、入射应力波的传播和反射应力波的传播三个紧实阶段。依据冲击动力学原理获得了试验条件下的型砂内部冲击应力波的波速，并分析了相关影响因素。The dynamic stress inside green sand during experimental compaction by air impact moulding can be achieved using a method of placing aluminium plate at the top of green sand.The results showed that the compaction process of green sand divides into three steps:the formation of impact load at the top of green sand(over the plate),the propagation of incident stress wave and the propagation of reflected stress wave.According to principle of impact dynamics,the speeds of stress wave inside green sand in laboratory were measured and some factors concerned have also been discussed.

关 键 词：气力冲击造型 应力波 型砂 紧实 应力分析 

分 类 号：TG242[金属学及工艺—铸造]