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摘要立体快速成型技术作为一种新型的加工技术，国内对其研究起步于90年代初，它是一种快速生成模型或者零件的制造技术。熔融堆积成型属于立体成型技术，熔融堆积成型是利用计算机的控制，通过CAD数据，采用熔融丝料堆积而成型。熔融堆积成型（FDM）对应3D打印机打印材料普遍为ABS和PLA，然而利用FDM方法打印固体推进剂在国内尚没有相关方面的研究。为了实现立体快速成型技术在推进剂成型方面的可行性，结合推进的成分结构和性能特点，分析利用熔融堆积成型技术实现推进剂成型的可能性。通过对熔融堆积成型精度的分析,找到其影响因素及影响规律，然后选用合适的安全代用材料开展实验研究，利用已知的工艺手段对新材料展开探索研究，找出其成型的最优工艺。然后逐步将惰性填料替换为高能炸药，为拓展推进剂成型技术手段提供原理和技术支撑并且掌握高固体含量打印料的制备技术，改进挤出头，使其挤出时不至发生阻塞。本作品使用的是熔化温度较低（100~150℃）的混合热塑性材料，并填充含能固体填料。较低的成型温度保证了加工含能材料的安全性，通过控制打印材料的加工温度，改装打印机使其具备安全装置，发生事故时切断打印料，使事故最小化从而达到降低危险性的目的。20687
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关键词 立体成型技术 推进剂成型 熔融堆积成型 成型精度 代用料
毕业论文设计说明书（论文）外文摘要
Title In stero-prototyping technology research explore the propellant molding
Abstract
Three-dimensional／stereoscopic rapid prototyping technology as a new processing technology，China started its research in the early 1990s, it is a manufacturing technology to quickly generate models or component。Fused Deposition Modeling is a three-dimensional rapid prototyping technology，under computer control and management，rely on existing CAD data,accumulate materials precise manner ,that is, from the point piled into the surface, the surface piled into a three-dimensional,then the resulting entity. Rely on three-dimensional rapid prototyping technology can generate very complex entity, and the process of forming the mold without auxiliary. FDM 3D printer to print material generally correspond to ABS and PLA, however, the use of FDM to print solid propellant in China yet no related research.
In order to study the feasibility of three-dimensional rapid prototyping technology in terms of propellant molding, combine the structure and performance characteristics of ingredients , demonstrate which rapid prototyping method is suitable for propellant system, we need to first analyze and summarize the factors for fused deposition modeling products ,what prone to defects and accuracy problems，reach the influencing factors and laws.Then choose the appropriate security alternative materials to carry out experimental studies,using known technology to start exploring new materials research, explore the best of the new material molding process.Finally gradually high explosives replaced to inert filler ,to provide the propellant molding techniques principles and technical support.This work uses a low melting temperature (100 ~ 150 ℃) mixing a thermoplastic material and filled with energetic solid filler.Forming a lower processing temperature to ensure the safety of energy-containing material, and a refitted safety device to increase the safety factor of the experiment.The main idea is as follows, 1、Prepare the components of solid propellant ,thermoplastic adhesive with high explosives ,as printed materials, use FDM method to achieve propellant molding. 2、Solve the FDM process of preparing solid propellant grain security problems(Control the temperature of a printing material processing,modify the printer so that it has a safety device,cut print material when accident,minimize accidents).3、Solve high solids systems extrusion problems(Grasp preparing technology of high solids print materials,improve extrusion head,not to block the extrusion,improve temperature control system,remains the extrusion head and the hot bed temperature stable during the heating,not to cause temperature accident).4、Use machines prepare smaller size tablet,then use adhesive bonding pills，small gains big, made larger size grain(apply the principle of layered manufacturing techniques, the first printing of small size semi finished products，then using the low fusion technology has been finished).