3D打印镂空型芯压缩性能及其铸造实验研究  

Experimental Study on Compressibility and Casting of 3D Printing Hollow Core

作　　者：梁西昌 万熠[1,2,3] 侯嘉瑞 辛倩倩 Liang Xichang;Wan Yi;Hou Jiarui;Xin Qianqian(Experimentalist,School of Mechanical Engineering,Shandong University,Jinan 250061,China;不详)

机构地区：[1]山东大学机械工程学院,济南市250061 [2]高效洁净机械制造教育部重点实验室 [3]机械工程国家级实验教学示范中心 [4]山东大学工程训练中心

出　　处：《工具技术》2022年第11期54-57,共4页Tool Engineering

基　　金：山东省重点研发计划(2020JMRH0202);山东省新旧动能转换重大产业攻关项目(2021-13);山东大学教育教学改革研究项目(2022Y133,2022Y124,2022Y312)。

摘　　要：为研究3D打印镂空结构对型芯压缩强度和铸造冷却温度造成的影响,以圆筒状零件的铸造为例,设计并3D打印了砂型上下模和三种型芯结构,包括实心型芯、无支撑和桁架支撑镂空型芯。进行了镂空型芯、实心型芯的压缩实验和A356铝合金的铸造实验,测量铸造过程中铸件的冷却温度变化。结果表明,所设计的无支撑和桁架支撑镂空型芯抗压强度约为实心型芯的18%和25%,镂空型芯抗压强度可满足铸件铸造要求;无支撑镂空型芯和桁架支撑型芯重量约为实心型芯重量的83%和87%,可减少砂型重量。采用镂空型芯可改变铸件的冷却速度,为调控铸件冷却场的研究奠定了基础。In order to study the effect of 3 D printing hollow structure on core compression strength and casting cooling temperature, taking the casting of cylindrical parts as an example, upper and lower molds of sand mold and three core structures are designed and printed, including solid core, unsupported and truss supported hollow core.The compression experiments of hollow core and solid core are carried out.The casting experiment of A356 aluminum alloy is carried out to measure the change of cooling temperature during casting.The results show that the compressive strength of designed hollow core without support and truss support is about 18% and 25% of that of solid core, and the casting experiment shows that the compressive strength of the hollow core can meet the casting requirements of the casting.The weight of unsupported hollow core and truss supported core are about 83% and 87% of the weight of solid core, which can reduce the weight of sand mold.The use of hollow core can change the cooling rate of castings, which lays a foundation for the study of regulating the cooling field of castings.

关 键 词：3D打印 镂空型芯 压缩强度 铸造温度 

分 类 号：TG115.65[金属学及工艺—物理冶金] TH162[金属学及工艺—金属学]