激光选区烧结快速成型技术中若干关键问题的研究-机械制造及其自动化专业论文.docx

江苏大学硕士学位论文ABSTRACT 江苏大学硕士学位论文 ABSTRACT R鑫p避Pfoto￡ypi驾(R玲is a珏advancea岛涨ing and p羚cessing tee趣罐ogy搬采is foIlowed with interest by researchers aIld manu妇ctures in recem years．Now the basic principles of蠡Ve kinds ofRP technology，which dofninate in the world，haVe boen integrated． Tb special RP systems，it is an important subject how to decreaSe fonning time，妇proVe the proto它，ping precision and extend t圭le utiIization area of prototyping without extra expensiVe cost，Just on the basis of all above opinions，囊e r。search滩the fo蕊ing precision，fofming time，scanning path，post-treatmem and RT of SLS on血e high molecular powder mate“als is 搿cceded．羹le}esult of t量lis research has boen suceesslly applied i砖协氇e薹{RPS·ll{A RP system and has great effect on manufacturing qualified pans，also is a foundation of a积谴lbra娃ng氇is system． Ail the factors that a野毫ct如e proto鲫ir撂precision are她tensiVely analyzed in this papeL mou曲mallufacturing special panem，using the Variance aIlalysis a11d rallge anaIysis of tlIe o撞hogon融。xpefiment，the e拄毫c拓of p∞cess par勰ele描on p∞童。够ping siZe，foml and position accurac y，surface mughness are discussed，the combination ofprocess parameters are 印垃糠zed，鑫nd氆e pfo瓣鼬堍q诚i每is gf。atly imp∞ved．强e w印p汹l锄of SLS is鑫lso stressed a11d the fndamental cause，developing虹如d and settlement of mis problem is adVanced．霹le in霞uence of壤e p蠢mary process pa鞭metefs on the wa带distortion is reviewed throu曲t11e onhogonal experiments．The result a11d sol砸on of mis experiment have g溉n guidallce to minish the wa瞪distortion of material SLS syStems．In the dissertation，the 碰蜘nion meehanism of SLs is dissertatcd黼d圭11e cOmpfe沁ns主vc se掇e黼en芏of SLS distortion is proposed． 硅e撇￡he黜溆l m胡e}姆w撼馥激fo糯堍{ime c繇k p戳isely caleul蹴d is ratiocinated．This model shows that in SLS the scarming“delay’’phenomenon can make the ∞tual＆rming￡ime greatly exceed奄e也eoretlcal time，and也e total number，total leng氇of the scanning lines and the scanning speedhave diffbrem e腋cts on the scanning‘‘delay”．111is model a11d the experiment soluti