本文選題：PLA　切入點：熔融沉積成型　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：熔融沉積成型系統(tǒng)的低成本是相比其他快速成型工藝的一大優(yōu)勢,因而得到了廣泛應(yīng)用。在熔融沉積成型過程中,工藝參數(shù)對成型零件的特性能夠產(chǎn)生重要的影響。本文通過理論分析,以大量的試驗研究為基礎(chǔ),對成型過程中的主要工藝參數(shù)進行分析研究,從而提高了成型件的尺寸精度、成型時間和彈性性能。本文所做的主要工作及取得的研究成果如下:(1)系統(tǒng)地介紹了影響熔融沉積成型零件精度的因素,從原理性、成型工藝過程和后處理三個方面進行分析,并針對各影響因素,提出了相應(yīng)的改進措施,為優(yōu)化成型過程中的工藝參數(shù),提高成型件的尺寸精度、成型時間和彈性性能提供了方法支撐。(2)以成型零件的出絲過程為對象,研究擠出絲材的截面模型,建立絲材的寬度模型;考慮材料收縮特性對成型件宏觀尺寸的影響,構(gòu)建成型件內(nèi)外輪廓的補償量模型;研究成型加工過程中的臺階效應(yīng),建立臺階誤差的理論模型。(3)以成型零件的尺寸精度為研究對象,設(shè)計標(biāo)準(zhǔn)件,通過正交試驗,采用不同的多指標(biāo)正交試驗分析方法研究分層厚度、路徑寬度和輪廓數(shù)對尺寸精度的影響,分別得出尺寸誤差最小時的工藝參數(shù)水平組合。通過試驗,研究路徑寬度對成型件外觀形貌的影響,得到不同尺寸零件外觀形貌最優(yōu)時的路徑寬度水平。(4)采用PLA材料,研究成型過程中的工藝參數(shù)對成型件彈性性能的影響,通過一套玩具器械反應(yīng)成型件的彈性性能,建立工藝參數(shù)與系統(tǒng)評價指標(biāo)間的映射關(guān)系及其模型,進行單因素試驗和響應(yīng)面試驗,優(yōu)化成型過程中的約束條件,并對模型預(yù)測最優(yōu)方案進行試驗驗證,為最大限度地利用成型件的彈性性能提供指導(dǎo)。
[Abstract]:The low cost of the melt deposition molding system is one of the advantages over other rapid prototyping processes, so it has been widely used. The process parameters can have an important influence on the characteristics of the forming parts. Based on the theoretical analysis and a large number of experimental studies, the main process parameters in the forming process are analyzed and studied, thus improving the dimensional accuracy of the molded parts. The main work and research results in this paper are as follows: (1) the factors that affect the precision of fused deposition forming parts are introduced systematically, and analyzed from three aspects: principle, forming process and post treatment. According to the influence factors, the corresponding improvement measures are put forward, which can provide method support for optimizing the process parameters, improving the dimensional accuracy, forming time and elastic properties of the forming parts. The cross section model of extruded wire is studied and the width model of wire is established. Considering the effect of material shrinkage on the macro dimension of the forming part, the compensation model of the inside and outside contour of the forming part is constructed. The step effect in the molding process is studied. The theoretical model of step error is established. (3) taking the dimensional accuracy of forming parts as the research object, the standard parts are designed. Through orthogonal test, different multi-index orthogonal test methods are used to study the delamination thickness. The influence of path width and contour number on dimension precision is obtained, and the horizontal combination of process parameters when the dimension error is minimum is obtained. The influence of path width on the appearance and morphology of the molded parts is studied by experiments. The PLA material was used to study the influence of the process parameters on the elastic properties of the molded parts. Through a set of toy instruments, the elastic properties of the molded parts were studied. The mapping relationship between process parameters and system evaluation indexes and its model are established. Single factor test and response surface test are carried out to optimize the constraint conditions in the molding process. It provides guidance for the maximum use of the elastic properties of the molded parts.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH16

【參考文獻】

相關(guān)期刊論文 前10條

1 李東方;陳繼民;袁艷萍;黃寬;方浩博;;光固化快速成型技術(shù)的進展及應(yīng)用[J];北京工業(yè)大學(xué)學(xué)報;2015年12期

2 阮久莉;郭玉文;喬琦;;廢打印機回收處置的生命周期評價[J];環(huán)境工程技術(shù)學(xué)報;2015年04期

3 阮久莉;郭玉文;劉景洋;喬琦;;我國打印機報廢量預(yù)測研究[J];中國資源綜合利用;2013年05期

4 王忠宏;李揚帆;張曼茵;;中國3D打印產(chǎn)業(yè)的現(xiàn)狀及發(fā)展思路[J];經(jīng)濟縱橫;2013年01期

5 江靜;祁文軍;阿地力·莫明;;快速成型技術(shù)在醫(yī)學(xué)上的應(yīng)用[J];機械設(shè)計與制造;2011年05期

6 陳雪芳;榮靜;;基于FDM的快速成型質(zhì)量的研究[J];蘇州市職業(yè)大學(xué)學(xué)報;2009年01期

7 劉斌;謝毅;;熔融沉積快速成型系統(tǒng)噴頭應(yīng)用現(xiàn)狀分析[J];工程塑料應(yīng)用;2008年12期

8 劉曉輝;;快速成型技術(shù)發(fā)展綜述[J];農(nóng)業(yè)裝備與車輛工程;2008年02期

9 王天明;習(xí)俊通;金燁;;熔融堆積成型中的原型翹曲變形[J];機械工程學(xué)報;2006年03期

10 潘琰峰,沈以赴,顧冬冬,胥橙庭;選擇性激光燒結(jié)技術(shù)的發(fā)展現(xiàn)狀[J];工具技術(shù);2004年06期

，

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