本文選題：快速成型　切入點(diǎn)：車身覆蓋件　出處：《大連理工大學(xué)》2016年碩士論文

【摘要】：隨著“中國制造2025”等國家政策措施對發(fā)展增材制造技術(shù)的扶持以及3D打印技術(shù)可以帶來的巨大利益驅(qū)使,國內(nèi)眾多科研機(jī)構(gòu)加大了對這一制造技術(shù)的資金和人才投入。隨著研究的不斷深入和市場的積極開拓,增材制造技術(shù)飛速發(fā)展、日臻完善,己走出實(shí)驗(yàn)室并在汽車、航空航天、工業(yè)設(shè)備、生物醫(yī)藥工程、食品加工、微納制造等眾多領(lǐng)域獲得了廣泛的應(yīng)用�！吨袊圃�2025》的出臺加速了中國制造業(yè)的轉(zhuǎn)型升級,也使得越來越多的制造企業(yè)開始將目光投向“3D打印”這一戰(zhàn)略性新興產(chǎn)業(yè)。因其加工制造靈活性強(qiáng)、無需開發(fā)設(shè)計(jì)模具等特點(diǎn),在汽車工業(yè)方面主要應(yīng)用于設(shè)計(jì)開發(fā)領(lǐng)域和零部件制造領(lǐng)域。汽車是一個大批量生產(chǎn)的產(chǎn)品,3D打印的加工效率問題決定其更適合于個性化、小批量產(chǎn)品的生產(chǎn)。如何提高3D打印加工效率也成為了一個亟待解決的重要技術(shù)問題。本文研究對象是FDM工藝中Zigzag填充掃描加工軌跡優(yōu)化問題,優(yōu)化目標(biāo)是提高3D打印加工效率。首先建立了3D打印的運(yùn)動學(xué)模型,在機(jī)構(gòu)運(yùn)動學(xué)參數(shù)的約束下,研究了3D打印的最優(yōu)填充掃描方向問題。通過實(shí)例驗(yàn)證了填充掃描速度、填充掃描加速度、填充掃描線寬度是最優(yōu)填充掃描方向的影響因素。為了解決掃描線連接處步進(jìn)電機(jī)多次啟停的問題,采用貝塞爾曲線優(yōu)化了掃描線的連接方式,改變了填充掃描線連接處的運(yùn)動學(xué)模型,引入樣條曲線插補(bǔ)的原理,并采用龍格庫塔算法求解插補(bǔ)參數(shù),從而計(jì)算曲線連接處的加工時間。對于復(fù)雜平面輪廓的填充掃描,本文提出了一種區(qū)域分割算法,可將平面輪廓分割成若干個可以連續(xù)加工的子區(qū)域。該算法減少了噴頭跨越內(nèi)孔等非加工區(qū)域的抬刀次數(shù),空行程僅發(fā)生在區(qū)域連接時。最后通過實(shí)例驗(yàn)證了該算法的有效性及正確性,對提高3D打印效率具有重要的研究意義。
[Abstract]:With the support of national policies and measures such as "made in China 2025" and the huge benefits that 3D printing technology can bring, Many domestic scientific research institutions have increased their capital and human resources investment in this manufacturing technology. With the continuous deepening of research and the active development of the market, the material increasing manufacturing technology has developed rapidly and is becoming more and more perfect. Industrial equipment, biomedical engineering, food processing, micro-nano manufacturing and many other fields have been widely used. The introduction of "made in China" accelerated the transformation and upgrading of China's manufacturing industry. As a result, more and more manufacturing enterprises are beginning to focus on the strategic emerging industry of "3D printing". Because of its strong flexibility in processing and manufacturing, it does not need to develop and design molds and other characteristics. It is mainly used in the field of design and development and in the field of parts and components manufacture in automobile industry. The efficiency of 3D printing of automobile is a mass production product, which is more suitable for individuation. How to improve the efficiency of 3D printing has also become an important technical problem to be solved urgently. This paper focuses on the optimization of Zigzag filling and scanning machining trajectory in FDM process. The optimization goal is to improve the processing efficiency of 3D printing. Firstly, the kinematics model of 3D printing is established. The optimal filling scanning direction of 3D printing is studied under the constraint of kinematics parameters of the mechanism. The filling scanning speed is verified by an example. In order to solve the problem of multiple start and stop of stepper motor in scan line connection, Bezier curve is used to optimize the connection mode of scan line, in order to solve the problem that the scan direction is affected by filling scan acceleration and filling scan line width. In this paper, the kinematics model of filling scanning line joint is changed, the principle of spline curve interpolation is introduced, and the interpolation parameters are solved by Runge-Kutta algorithm, so as to calculate the processing time at the junction of curve. In this paper, a region segmentation algorithm is proposed, in which the planar contour can be divided into several sub-regions that can be continuously machined. The empty stroke only occurs in the area connection. Finally, the validity and correctness of the algorithm are verified by an example, which is of great significance to improve the efficiency of 3D printing.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U463.82

【參考文獻(xiàn)】

中國期刊全文數(shù)據(jù)庫 前10條

1 葉軍祥;;3D打印在汽車行業(yè)中的應(yīng)用[J];內(nèi)燃機(jī)與配件;2016年02期

2 吳勇毅;陳淵源;;《中國制造2025》上的3D打印“國家戰(zhàn)略”[J];上海信息化;2015年10期

3 牛銳敏;;3D打印汽車呼之欲出[J];汽車科技;2014年06期

4 程美;;3D打印技術(shù)及其在汽車制造業(yè)中的創(chuàng)新應(yīng)用[J];模具制造;2014年08期

5 李小麗;馬劍雄;李萍;陳琪;周偉民;;3D打印技術(shù)及應(yīng)用趨勢[J];自動化儀表;2014年01期

6 谷祖威;于慧;;3D打印技術(shù)對汽車零部件制造業(yè)的影響[J];現(xiàn)代零部件;2013年09期

7 盧秉恒;李滌塵;;增材制造(3D打印)技術(shù)發(fā)展[J];機(jī)械制造與自動化;2013年04期

8 衛(wèi)洪春;彭小利;;掃描線多邊形區(qū)域填充算法研究[J];四川文理學(xué)院學(xué)報(bào);2012年05期

9 陳偉華;張鐵;;三次均勻有理B樣條曲線插補(bǔ)算法的研究[J];機(jī)械設(shè)計(jì)與制造;2010年08期

10 朱傳敏;唐s，

本文編號：1680824