3D打印石膏型无模快速精密铸造工艺研究  

Research on Moldless Rapid Precision Casting Technology of Plaster Mold by 3D Printing

作　　者：许中明[1] 黄学能 钱江 XU Zhongming;HUANG Xueneng;QIAN Jiang(School of Intelligent Manufacturing,Shunde Polytechnic,Foshan 528333,China;Guangzhou Mingzhu Electric Co.,Guanzhou 511400,China)

机构地区：[1]顺德职业技术学院智能制造学院,广东佛山528333 [2]广州明珠电气股份有限公司,广东广州511400

出　　处：《铸造技术》2019年第12期1324-1327,共4页Foundry Technology

基　　金：广东省轻工装备智能制造工程技术研究中心开放课题资助项目（2019-KJZX011）

摘　　要：以斜齿轮为铸造试验对象,沿工艺流程从铸型设计、铸型3D打印、铸型脱水、零件浇注4阶段对石膏型无模快速精密铸造工艺进行了研究。结果表明,当所铸零件形状复杂时,釆用剖分结构的铸型比整体铸型更有利于型腔内部余粉的清理;型腔表面不用刷硅溶胶或水玻璃等.但需进行脱水处理,否则铸件易出现气孔等缺陷;石膏型无模铸造充型能力强,型壳清理方便,铸造出来的零件尺寸精度可达CT5-CT6,表面粗糙度Ra值可达3.2-6.3μm.With helical gears as the casting test object,the moldless rapid precision casting technology of plaster mold was studied by four stages as casting mold design,3D printing,dewatering and casting parts along the process flow.The results show that when the shape of the casting parts is complex,the partition structure is more advantageous to the cleaning of the cavity interior than the whole casting;the surface of the cavity inside the plaster casting does not need to be brushed with silica sol or sodium silicate,but needs to be dewatered,otherwise the casting is prone to defects such as blowhole;the filling capacity of plaster mold is better than that of the sand mold.The plaster mold is easy to clean.The dimensional precision of the part casted can reach CT5~CT6,and the Ra value of surface roughness can reach 3.2~6.3μm.

关 键 词：石膏型 无模铸造 精密铸造 3D打印 

分 类 号：TG249.5[机械工程—精密仪器及机械]