Production technique for upper valve plate of vehicle gearbox

The invention provides a production technique for an upper valve plate of a vehicle gearbox. The production technique comprises the technological steps of smelting, refining, pressure casting, deburring, and final inspection and packaging. According to the production technique, the time, temperature and pressure in the production process are adjusted to be within the optimal ranges based on experimentally validated data; meanwhile, the product quality is further improved through a reasonable check method after each technological step; and the upper valve plate, produced according to the preparation technique, of the vehicle gear box is high in material purity and large in density, the valve plate can effectively adapt to the working environment of the vehicle gearbox, the stability of the vehicle gearbox during work is maintained, and the service life of the vehicle gearbox is prolonged. 本发明设计了种汽车变速箱上阀板生产工艺，包括熔炼、精炼、压铸、去毛刺及终检包装的工艺步骤，按照本发明依据实验验证数据，将生产过程中的时间、温度、压力调整至最佳范围内，同时在每个工艺步骤后以合理的检验手法进步提升产品质量，按照本发明的制备工艺所成产