畢業(yè)設(shè)計 選擇性激光燒結(jié)快速成型機機械系統(tǒng)設(shè)計
論文說明書共43頁，字數(shù)總計：17285
資料簡介：
A1-傳動機構(gòu).DWG
A1-激光掃描工作臺.DWG
A2-鋪粉滾筒.DWG
A1-SLS快速成型機.DWG
A2-齒輪.DWG
A0-SLS快速成型機.DWG
A0-SLS成型機部件.DWG
摘 要

快速成型(RP)技術(shù)是近年來倍受學術(shù)界和制造業(yè)關(guān)注的一種先進成型制造技術(shù)。目前世界上占主導地位的5種RP成型方法其基本原理業(yè)己完善，針對具體的RP系統(tǒng)如何在不增加昂貴的附加成本的同時，進一步提高成型效率、提高成型件的精度、完善成型件性能以及盡量擴展成型件的適用范圍是發(fā)展RP技術(shù)的重要課題.作者正是基于以上觀點，就高分子粉末材料的激光選區(qū)燒結(jié)(SLS)快速成型技術(shù)中的成型精度、成型時間、掃描路徑、成型件的后處理及成型件在制模中的應(yīng)用問題開展了深入的研究。將所研究結(jié)果應(yīng)用于設(shè)計機械結(jié)構(gòu)中，提高成型機工作合理性。
選擇性激光燒結(jié)工藝（SLS）又稱為激光選區(qū)燒結(jié)。是借助精確引導的激光束使材料粉末燒結(jié)或熔融后凝固形成三維原型或制件。該工藝方法是由美國得克薩斯大學奧斯丁（Austin）分校的C.R.Dechard于1989年研制成功的。
目前研究SLS的有DTM公司，E.O.S公司，3D Systems公司，北京隆源公司，華中科技大學，華北工學院，南京航空航天大學等。其中，最早將SLS市場化的是DTM公司。
作者對比DTM，EOS兩大公司的經(jīng)典設(shè)計方案，改進設(shè)計結(jié)構(gòu)，增強工作性能，試圖將新的思想帶入到SLS成型機的設(shè)計中。


關(guān)鍵詞：快速成型，激光選區(qū)燒結(jié)，成型效率，成型精度
The Selective Laser Sinter

Abstract
Rapid Prototyping( RP)is an advanced forming and processing technology that is followed with interest by researchers and manufactures in recent years. Now the basic principles of five kinds of RP technology, which dominate in the world, have been integrated. To special RP systems, it is an important subject how to decrease forming time, improve the prototyping precision and extend the utilization area of prototyping without extra expensive cost. Just on the basis of all above opinions, the research on the forming precision, forming time, scanning path, post-treatment and RT of SLS on the high molecular powder materials is preceded. The result of this research has been successfully applied into the system and has great effect on manufacturing qualified parts, also is a foundation of ameliorating this system.
The Selective Laser Sinter(SLS) is also named Laser Selectivity Sinter. It can make the datum powder sinter or blend to three-dimensional antitype by dint of exactitude introductory laser. This craftwork is created in 1989 by an American, C.R.Dechard, who lived in the Austin.
Now, there are many company studying the SLS in the world, for example , the DTM, E.O.S, 3D Systems. And there are also many company in our country, for instance, Beijing Longyuan Lst., the middle of China science and technology University. But the first company who made the SLS commercial is the DTM.
Author would like compare the design blue print of DTM and E.O.S, and improve the design, also try to take a new idea into the SLS.


KEYWORDS: Rapid Prototyping, Selective Laser Sintering, forming precision,Forming time
目錄
1緒論…………………………………………………………………………………… 6
1.1對快速成型技術(shù)的全面理解………………………………………………… 6
1.2 當前主要的RP技術(shù)…………………………………………………………… 7
1.2.1 主要快速成型系統(tǒng)的綜述………………………………………………… 7
1.2.2 幾種主要RP技術(shù)的比較…………………………………………………… 8
1.2.2.1 尺寸精度…………………………………………………………………… 8
1.2.2.2 零件制造時間……………………………………………………………… 9
1.2.2.3 制件的復雜程度…………………………………………………………… 9
1.2.2.4 制作成本…………………………………………………………………… 9
1.3 基于SLS成型技術(shù)的材料…………………………………………………… 9
1.4 RP技術(shù)的發(fā)展現(xiàn)狀…………………………………………………………… 10
1.4.1 金屬零件的直接制造和模具的快速制造……………………………… 12
1.4.2 RP系統(tǒng)的發(fā)展……………………………………………………………… 13
1.5 本課題設(shè)計的目的和主要內(nèi)容…………………………………………… 13
2 設(shè)計方案題目要求…………………………………………………………… 13
3 SLS的工作原理………………………………………………………………… 13
3.1信息過程——離散處理……………………………………………………… 13
3.2物理過程——疊加成型……………………………………………………… 13
3.2.1 DTM——分缸鋪粉………………………………………………………… 14
3.2.2 E.O.S——送料槽鋪粉……………………………………………………… 14
4 SLS的工藝過程及特點………………………………………………………… 17
4.1 激光選區(qū)燒結(jié)（SLS）的工藝特點……………………………………… 17
4.2工藝過程………………………………………………………………………… 17
4.2.1 粉末原料的燒結(jié)…………………………………………………………… 18
4.2.2粉末材料的選擇…………………………………………………………… 19

5 SLS的系統(tǒng)組成………………………………………………………………… 20
5.1主機……………………………………………………………………………… 21
5.1.1成型工作缸……………………..