The Research Of Process Of Copper Alloy Die-casting

Die-casting is a sort of high efficiency, few cutting of metal figuration exactitude foundry method which developed quickly in latter-day metal process craft. This craft method has been widely used in every walk of work in nation economy. During the process of die-casting, the air hole and shrink hole frequently exist in the casting. This paper will research how to avoid air hole and the quality of mounding during die-casting.The date configuration of Solidworks and ProCAST was analysis in this paper, using the method of sm1+sm2=sm3 to solve the problem of simulation model construction. This solved the difficulty of date interface. And establish the shot sleeve module for slow shot phrase. Use the shell model to found the special shell between mould/casting in Pro/E. This method can solve the problem of date transfer between CAD/CAM.The air can be vent to cavity entirety when the slow shot acceleration is 2m/s~2 simulated by ProCAST under the present sleeve parameter. The best casting can be obtained when the model temperature is 200℃, the pour temperature is 1150℃under this acceleration.The vacuum die-casting can decrease air hole,improve the surface quality and keep the size stability,reduce the specific pressure,extend the life of mould. The Cu alloy vacuum die-casting system was designed and produced. The systems were computed to validate.During design the vacuum die-casting moulds, We realized vacuuming cavity of moulds without totally enclosing moulds by multi-spot bleeding of steam and spiral air channel through improve original Cu alloy bearing cage mould. This method was easy to mend mould, decrease the cost and the difficulty of technology, it also improve the quality of the casting.The slow shot theory equation and the vacuum die-casting theory equation was deducted, we obtain the range of acceleration 1.39-4.4m/s~2 under lab condition. The common flaw of gas hole generated by involved gas in the shot room was settled effectively in the course of Cu alloy die-casting.Judging from fractures of products, position of flaws in the products kept consistent with simulation results of solidifying state. The purpose of predicting flaws was realized. The perfect castings were obtained through these processing parameters.