【摘要】 采用铸造仿真MAGMA软件对高挡位自动挡变速箱壳体的三种浇注系统和排溢系统进行充填和凝固过程数值模拟,通过分析比较模拟结果,确定了最优浇排系统设计方案和压铸工艺。同时,采用局部增压技术,对铸件中的高压油道进行增压补缩,消除了缩孔、缩松等铸造缺陷。最后通过压铸生产,验证了浇排系统和局部增压结构设计合理,为其他类似的大型、复杂变速器壳体压铸工艺设计提供参考。更多还原

【Abstract】 Using the casting simulation software MAGMA, the filling and solidification process of three different pouring and overflow systems in the design of a high-gear auto transmission case were simulated, the optimal scheme of the pouring and overflow systems were determined by analyzing and compating the evaluation of the simulation results. At the same time, using the local pressurization technology, the high-pressure oil passage of the casting were pressurized and fed, the casting defects of shrinkage, dispersed shrinkage etc. were avoided. Finally the design of the pouring systems and the local pressurization structure were reasonable by the die casting production test, the design of large-scale complicated transmission case could be used as a reference for the casting process of similar products.更多还原