机械5

小型三角洲式3D打印机机械结构设计 摘要 随着新兴技术的发展，逆向工程技术在近几年得到了高速的发展，其中也包括了3D打印技术。为提高快速成型技术的应用水平，快速高效的处理已成为3D打印技术发展的新课题。 在分析3D打印机的发展概况、基本原理的基础上，提出了三角洲式FDM 3D打印机的总体设计方案，并对3D打印机的机械结构进行了设计，主要包括：框架设计、传动装置设计、送料装置、电控元选择等方面，此外对关键零件进行了校核。通过提高喷嘴的精度，提高了射流精度。传动部分采用滑动螺杆与滚动导轨相结合，保证传动精度提高传动效率。使用线性步进电机直连丝杠，使响应更加准确、快速，简化了中间传动环节，使精度更高。 关键词：3D打印技术；并联机床；传动机构；步进电机；喷头 Abstract With the developme
nt of emergi
ng tech
nologies, reverse e
ngi
neeri
ng tech
nology has bee
n developed rapidly i
n rece
ntyears, i
ncludi
ng the 3D pri
nti
ng tech
nology.A
nd
now 3D pri
nti
ng tech
nology has bee
nwidely used i
n the field of mecha
nical ma
nufacturi
ng. To improve the applicatio
n level of rapid prototypi
ng tech
nology a
nd fast-efficie
nt processi
ng has become a project of 3D pri
nti
ng tech
nology. To a
nalysis the developme
nt of the 3D pri
nter,we put forward the overall pla
n of desig
n of the delta type FDM3D pri
nter based o
n the ultimate pri
nciple, a
nd to desig
n the mecha
nical structures of the 3D pri
nter, i
ncludi
ng frame desig
n, tra
nsmissio
n desig
n, feedi
ng device, co
ntrol eleme
nt selectio
n. Furthermore the key parts have bee
n checked. Pri
nti
ng precisio
n has bee
n improved by improvi
ng the accuracy of
nozzle; With form of combi
ni
ng the slidi
ng screw a
nd rolli
ng guide i
n the tra
nsmissio
n part is
not o
nly e
nsure the tra
nsmissio
n accuracy, improved the tra
nsmissio
n efficie
ncy, used the li
near stepper motor that directly co
n
nectedwith screw but also made the respo
nse more accurate a
nd fast.with
no i
ntermediate tra
nsmissio
n li
nks, the mecha
nical structure is simplified. a
nd made a higher precisio
n. Keywords: 3D pri
nti
ng tech
nology; parallel machi
ne tool; tra
nsmissio
n mecha
nism; steppi
ng motor;
nozzle 目录 摘要I Abstract II 第一部分设计调研报告5 1.1概述5 1.2学生、教师简介5 1.3调研时间及调研形式6 1.4调研企业及其概况6 1.5调研内容6 1.5.1课题所涉及技术领域的基本情况6 1.5.2该项目的设计方法、研发手段、技术特点均与项目或结构有关8 1.5.3现阶段存在的技术问题8 1.5.4市场需求及产品应用前景分析9 1.5.5结论10 第二部分设计可行性论证报告11 2.1设计课题要达到的设计目的11 2.2调研结论11 2.3方案设计12 2.4设计方案论证13 2.4.1技术方面13 2.4.2制造方面13 2.4.3经济性方面13 2.4.4现有的知识储备方面13 2.4.5结论14 第三部分设计计算书14 3.1打印机框架整体设计14 3.1.1打印机框架尺寸设计14 3.1.3连杆的强度校核16 3.2挤出部件设计17 3.3.1丝杠的选取及其校核20 3.3.2螺杆的设计21 3.强度校核22 3.3.5销的计算及校核26 参考文献28 致谢29