基于FDM工艺的3D打印机机械系统设计制造研究

发布时间：2018-05-03 03:31

本文选题：FDM + 3D打印　；参考：《华北电力大学》2017年硕士论文

【摘要】：3D打印技术做为一项新兴的制造技术,最近几年发展迅猛,已经广泛应用于制造业的各个领域。在不同技术的3D打印设备中,FDM(Fused Deposition Modeling,熔融沉积)工艺3D打印机一般具有构造简单、设计简洁、结构明了的特点,并且该种设备制造成本、维护成本和成型材料成本在各项技术中也是最低的。因此在目前市场中的桌面级3D打印机,该技术应用最为广泛。目前市场中常见的桌面级FDM工艺3D打印机有Maker Bot公司的Thing-Matic、Replicator系列打印机、3Dsystems公司的Cube打印机及其衍生产品。目前市场中的FDM工艺3D打印机多为小型桌面化设备,成型尺寸较小。在打印尺寸较大的零件时,以往的方法往往是分段打印然后拼接,这样强度明显达不到要求。因此,研发较大成型尺寸的FDM工艺3D打印机且使其产业化、市场化将具有巨大的应用潜能和广阔的市场前景。本课题旨在探索一种结构稳定、控制简单、可实现高速打印、成型空间达500×500×500mm的大尺寸FDM工艺3D打印机。本文研究内容主要有3D打印机的机械系统结构设计同时涉及控制电路搭建与调试、控制软件的选择,以及打印实验验证。首先,分析主流FDM工艺3D打印机的结构特点、技术原理、工艺过程、技术特点,比较各种结构的优缺点,总结出完整的机械系统设计方案。利用三维建模软件PROE对结构设计方案中的各主要零部件进行数字化设计和虚拟装配,得到整机机械系统的三维装配模型。然后,运用ANSYS Workbench有限元分析软件,对机械系统中主要的承力部件进行有限元分析验证结构的可行性。在所设计的机械系统结构基础上,完成3D打印机控制电路的选型和搭建。对主控制板进行固件程序烧录,实现主控制板对3D打印机各执行模块的控制。进行打印实验,通过电路硬件调试与切片软件参数设置,实现打印功能。本文具有一定的工程实际应用意义,对于FDM工艺3D打印机结构的设计和结构优化有重要参考价值。
[Abstract]:As a new manufacturing technology, 3D printing technology has developed rapidly in recent years and has been widely used in various fields of manufacturing industry. In different technology 3D printing equipment, the 3D printer of FDM / Fused Deposition Modeling (fused deposition) process generally has the characteristics of simple structure, simple design and clear structure, and the cost of this kind of equipment. The cost of maintenance and molding materials are also the lowest in various technologies. Therefore, in the current market of desktop-class 3D printers, this technology is the most widely used. Among the most popular desktop FDM process 3D printers in the market are Maker Bot's Thing-Matic Replicator series, Cube printers and their derivatives. At present, the FDM process 3D printer in the market is mostly a small tabletop device, and the molding size is small. When printing larger parts, the previous methods are usually piecewise printing and splicing, so the strength is obviously not up to the requirement. Therefore, the development and industrialization of FDM process 3D printer with large molding size will have great application potential and broad market prospect. The purpose of this paper is to explore a large scale FDM process 3D printer with stable structure, simple control, high speed printing and forming space up to 500 脳 500 脳 500mm. The main contents of this paper are the design of 3D printer's mechanical system and the construction and debugging of control circuit, the choice of control software, and the verification of printing experiment. Firstly, the structural characteristics, technical principle, technological process and technical characteristics of the mainstream FDM process 3D printer are analyzed, and the advantages and disadvantages of various structures are compared, and the complete mechanical system design scheme is summarized. The 3D assembly model of the mechanical system of the whole machine is obtained by using the 3D modeling software PROE to carry out the digital design and virtual assembly of the main parts in the structural design scheme. Then, using ANSYS Workbench finite element analysis software, the feasibility of the structure is verified by the finite element analysis of the main load-bearing parts in the mechanical system. On the basis of the designed mechanical system, the control circuit of 3D printer is selected and built. The firmware program is burned on the main control board to realize the control of each execution module of 3D printer by the main control board. The printing experiment was carried out, and the printing function was realized by debugging the circuit hardware and setting the parameters of slicing software. This paper has certain engineering practical application significance, has the important reference value to the FDM process 3D printer structure design and the structure optimization.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP334.8

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