激光气化冻结浆料分层实体制造中黏结剂的选择  

Binder Selection for Frozen Slurry-Based Laminated Object Manufacturing by Laser Gasification

作　　者：张耿[1] 李娜 郭元章 杨少斌 陈桦[1,2] ZHANG Geng;LI Na;GUO Yuanzhang;YANG Shaobin;CHEN Hua(School of Mechatronic Engineering,Xi＇ an Technological University,Xi＇ an 710021,China;Shaanxi Key Laboratory of Non Traditional Machining,Xi＇ an Technological University,Xi＇an 710021,China)

机构地区：[1]西安工业大学机电工程学院,西安710021 [2]西安工业大学陕西省特种加工重点实验室,西安710021

出　　处：《西安工业大学学报》2018年第4期343-348,359,共7页Journal of Xi’an Technological University

基　　金：陕西省科技统筹创新项目(2014KTCQ01-22);陕西省特种加工重点实验室开放基金(2017SXTZKFJG03)

摘　　要：为减小多孔陶瓷3D打印加工过程中坯体的变形,提出了一种基于冻结陶瓷浆料的分层实体制造方法(FS-LOM).采用刮片铺设浆料,通过冷冻板建立固体支撑,利用激光气化切割2D图形,采用冷冻干燥技术获得多孔结构.分析了FS-LOM的加工机理;选取3种黏结剂配制陶瓷浆料,进行了加工实验和结果分析.结果表明:FS-LOM具有加工过程坯体无变形的特点,在提高孔隙设计性,改善零件台阶效应等方面具有潜力;采用羧甲基纤维素钠作为黏结剂配制的浆料,具有共晶点高,激光切割效果好,层间结合紧密的优点,可满足FS-LOM的加工要求.In order to reduce the deformadon of porous ceramic body in the 3D priwdng, the paper presents a method of frozen ceramic slurry-based laminated object manufacturing （FS-LOM） .- paving slurry by a scraper, forming a solid support by a cryopanel, cutting 2D graphs by laser gasification, and obtaining the porous structure by freeze-drying method. The processing mechanism of FS-LOM is analyzed. Three kinds of binder were selected and used to prepare ceramic slurry. The processing experiment was conducted and its results were analyzed. The results show that there is no deformation in the processing of the body by FS-LOM and it has the potential to improve the design of porous structure and the stair-stepping effect of parts. The slurry prepared with sodium carboxymethyl cellulose as the binder has the advantages of high eutectic point, good laser cutting effect and compact combination between layers,which can meet the requirement of FS-LOM processing.

关 键 词：激光气化 多孔结构 陶瓷浆料 黏结剂 

分 类 号：TH16[机械工程—机械制造及自动化]