Design And Numerical Simulation Of Automobile Gearbox Top Casting Mold

The Manufacturing industry is the foundation of a country’s economic development,and casting industry is an important part of it.In view of the high energy consumption and resource consumption in the foundry industry,it is necessary to reduce the environmental impact of the foundry industry by optimizing the process.Currently,optimization of various process parameters to improve the utilization of various resources is an important means of energy saving and emission reduction in the foundry industry.Therefore,this thesis investigates the influencing factors in the design characteristics of the casting process,establishes a solid model based on the influence of the process design characteristics,and optimizes the relevant parameters to reduce the defects of the castings,improves the productivity of the castings,and promotes the sustainable development of the castings.Translated with www.DeepL.com/Translator（free version）The design of the automobile gearbox top cover casting as the research object first of all,based on the finite element analysis of the gearbox top cover casting process numerical simulation,analysis of the gate position on the gearbox top casting mold filling process,solidification process,shrinkage and porosity of the influence of the law,get the most reasonable casting method.Secondly,based on the simulation results of casting scheme,the structure of the casting mold is designed.Due to the complex structure of the inner cavity of the gearbox top cover,this design adopts the method of gravity casting with casting aluminum mold and sand core,which can ensure the inner manufacturing accuracy of the cavity and simplify the mold structure.Taking into account the location of parting surface,pushing mechanism,mold type and design principle of mold shape and size,the 3d modeling and assembly of casting aluminum mold and sand core mold parts were carried out,and finally the molding mold design of automobile gearbox top cover was completed.Finally,the optimized casting mold was simulated.Three parameters which have great influence on casting quality:pouring temperature,mould preheating temperature and pouring speed were selected as experimental factors to study single factor variable control and analyze the analysis of casting forming quality by different process parameters.L9（33）orthogonal table was established with filling state,solidification state and shrinkage cavity defects as test results index,and orthogonal tests of three factors and three levels were completed.The influence of various factors on the experimental indexes was analyzed,and the optimal combination of casting parameters was obtained:pouring temperature 700℃,mold preheating temperature 160℃,pouring speed 1.5kg/s.