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ABSTRACT
So far the most of table of circular saw on market is die-cast by aluminum alloy. That is because aluminum alloy not only has light weight, beautiful outlook, but also intensity quality. The aluminum alloy made table can have multi-shapes. Because the table of circular saw is to be with wide working area and thin thickness, many different shapes of ribs are usually used to increase its strength. However, this always develops quality problems, such as cracks, porosities, and shape changed. Therefore, how to develop a good designed aluminum alloy die casting product and also improve the die casting problem is need to be solve. This study will use mold-flow analysis to design the table mold of the circular saw. At first, we develop subsidiary institutions of table of circular saw, also take consider of the outlook and strength of the table to create its 3D model. Secondary, we use mold-flow analysis software at the mold developing stage to simulate how melt aluminum liquid fill-in metal mold. By this we can find out the better number and shape of entrances for melt aluminum liquid, and also the better design of ribs height on the table. Besides, we can estimate where the defects may happen by proper parametric inference. This helps us to decrease the risk, not just like the tradition way only rely on experiment experience, and also decrease problems on mold modification in future. Finally, we make molds according to the results of mold-flow simulations. After we finish die casting the table, we apply impact test on it to test its strength and precision on surface. Experiments show that the mold-flow analysis improves quality of the mold, decreases the defect rate of die-cast, and also the strength and precision of the table all meet our requirements. Key Words: circular saw, molding tool, die-cast, mold-flow analysis, entrances for melt aluminum liquid
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