某齿轮泵壳体快速铸造工艺的研究及应用

Research and Application of Fast Casting Process for Pump Shell

新研产品的生产周期及生产成本一直是传统铸造方法的弱点。为保证新研产品铸件的一次试制合格,简化了毛坯外形,设计铸造工艺方案,铸件内腔采用3D打印砂芯成形,铸件浇注后外形由机加工成形。简化后的模具加工总共用时15天,同步3D打印砂芯,每项铸件打印壳芯约一周时间。若壳体外部结构更改,本套模具还可继续生产铸件,若内腔油路更改,可用3D打印重新打印,大大降低了生产成本,为科研生产提供有力保障。

The production cycle and production cost of newly developed products have always been the weakness of traditional casting methods.In order to ensure the qualification of the first trial production of the newly developed castings,the blank shape was simplified,and the casting process was designed.The inner cavity of the castings was formed by 3D printing sand core,and the shape of the castings was machined after pouring.The simplified mold processing took a total of 15 days,synchronous 3D printing of the sand core,and about one week for each casting to print the shell core.If the external structure of the shell is changed,the mold can continue to produce castings.If the oil circuit in the inner cavity is changed,3D printing can be used to reprint,which greatly reduces the production cost and provides a strong guarantee for scientific research and production.