冷冻机体铸件平做立浇铸造工艺设计  

Casting Process Design of Horizontal Position Molding and Vertical Position Pouring for Freezer Housings

作　　者：陈宗民[1] 陈强 CHEN Zong-min;CHEN Qiang(College of Mechanical Engineering,Shandong University of Technology,Zibo 255049,Shandong,China;Shandong Honsin Group,Weifang 261307,Shandong,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049 [2]山东浩信集团,山东潍坊261307

出　　处：《铸造》2019年第7期764-768,共5页Foundry

摘　　要：介绍了一种冷冻机体铸件的平做立浇铸造工艺方法。该铸件属于薄壁箱体类铸件,外廓、内腔结构均很复杂,由于工作环境有承压和渗漏要求,铸件不允许有任何缺陷,并要进行压力渗漏试验。采用平做立浇工艺,兼顾了造型和液态金属充型的双重要求。在浇注系统中采用底雨淋加阶梯式浇注系统,使金属液分散进入型腔,并通过控制浇注系统各单元的截面比实现分层平稳注入。按照平做立浇工艺,设计了专用工装。该工艺降低了造型高度、方便了型芯装配,使浇注过程平稳,温度场均衡,实现了同时凝固,降低了铸造热应力。The casting process for freezer housing which is a kind of thin-walled box casting is introduced. This casting is characterized by its complexity of contour profile and cavity. Due to the requirements of pressure-bearing and anti-leakage in the working environment, no defects are tolerated in this casting and pressure leakage tests are required. A casting process with horizontal position molding and vertical position pouring is adopted, which takes into account both the molding and liquid metal filling. Bottom shower gating plus step gating system is designed to disperse the liquid metal into the mold cavity, in which the layered filling is realized by controlling the section ratio of each unit in the gating system. The special flask is designed for this process. In this design of casting process, the molding height is reduced, sand core assembly is very convenient, and molten metal can be poured smoothly, so temperature balance is realized and internal stress is reduced.

关 键 词：铸造工艺 铸件 平做立浇 底雨淋阶梯式浇注系统 冷冻机体铸件 

分 类 号：TG244[金属学及工艺—铸造]