摘要3D打印是快速成型领域的一种新兴技术，自诞生之日起就持续受到热烈关注，并且高速发展，在很多方面取得了重大进步。同时，随着微米/纳米技术水平的提高，微纳卫星逐渐成为市场主流，而3D打印在制造复杂三维微纳结构方面有着巨大优势。在利用3D打印制造卫星已成为新的发展潮流的背景下，本课题对如何改造桌面3D打印机使其支持复合打印进行了研究，以便满足卫星内部电路制造对于3D打印技术的需求。本文首先综述了3D打印技术的基本概念，国内外3D复合打印的研究现状，以及3D打印未来的发展趋势。然后，分析了对桌面3D打印机进行改造的目的、要求以及总体设计方案，确定了两项主要研究内容，包括导电材料选择和挤出机构设计。其次，查找并对比几种导电墨性能并进行测试。再次，设计了两种挤出头结构方案并总结优缺点。最后，本次桌面3D打印机的改造，从原理上验证了复合打印的可行性，能在打印产品模型的同时打印其内部电路，为以后直接打印带电路的卫星提供支持。49459

毕业论文关键词  3D打印  微纳卫星  导电墨水   挤出机构

毕业设计说明书外文摘要

Title    Modifying of the Desktop 3D Printer ——Composite Printing

Abstract

3D printing is an emerging technology in the field of rapid prototyping. It has continued to be warmly concerned and develop rapidly from the date of birth. And it has made significant progress in many areas. At the same time, with the improvement of micro/nano technology, the micro-nano satellite is gradually becoming the mainstream market. Meanwhile, 3D printing has a huge advantage in the manufacture of complex 3D micro-nano structures. In the case that using 3D printing to manufacture satellites is becoming the new trend of development, this subject did some research about how to modify a desktop 3D printer to support composite printing, so as to satisfy the needs of printing internal circuit in satellites. This paper firstly summarizes the basic concepts of 3D printing technology,the research status at home and abroad about composite printing, as well as the future development trend of 3D printing. Secondly,it analyzed the purpose, requirements and the overall scheme of modifying the 3D printer, then defined two main contents, including selection of conductive material and design of extruder. Thirdly, it found and compared the performance of several conductive ink,and tested their conductivity. Fourthly, two extrusion head was designed and this paper has summarized their advantages and disadvantages. Finally, this transformation of the desktop 3D printer has verified the feasibility of composite printing, which means printing the model and its internal circuits simultaneously. Therefore, this subject will give support to print satellite with circuit.

Keywords  3D printing   Micro-nano satellite   conductive ink   extruder

1  引言 3

1.1  3D打印技术概述 3

1.2  国内外复合打印的研究现状 5

1.2.1  常用3D打印技术的复合打印原理 5

1.2.2  卫星打印 5

1.2.3  电路打印 6

1.3  3D打印的发展趋势 7

2  桌面3D打印设备改造总方案 7

2.1  改造目的和要求 7

2.2  改造方案 8

3  导电性复合材料的选择