Production process flow of main differential shell casting of engineering machinery speed reducer

According to the production process flow of the main differential shell casting of the engineering machinery speed reducer, a split sand box template is adopted for externally fixing a differential shell sand mold before casting molding, and the operability is improved through the arrangement of a split structure; the internal combined sand core and the differential shell sand mold are kept compact, meanwhile, the split sand box mold plate can be used for forming the exhaust through hole, the exhaust efficiency can be improved while internal molten iron is prevented from overflowing, the exhaust efficiency can be maximized after the exhaust through hole is combined with the exothermic riser, the air hole defect of a casting is reduced, and the casting quality is improved. And material waste is reduced, and the production efficiency of the speed reducer main differential shell casting is improved. 一种工程机械减速器主差速壳铸件生产工艺流程，本申请在浇注成型前采用分体砂箱模板对差速壳砂型进行外部固定，分体式结构的设置提升可操作性，保持内部组合砂芯与差速壳砂型的紧实的同时能够利用分体砂箱模板进行排气通孔的开设，防止内部铁水外