面曝光快速成形光固化實(shí)驗(yàn)研究
發(fā)布時(shí)間：2018-08-17 18:40
【摘要】：隨著社會(huì)需求的不斷增加,人們生活質(zhì)量的不斷提高,個(gè)人消費(fèi)也逐步的個(gè)性化,從而對(duì)工業(yè)產(chǎn)品的生產(chǎn)不斷提出新要求。在這種產(chǎn)品多元化,個(gè)性化,小批量和復(fù)雜化的同時(shí),在激烈市場(chǎng)競(jìng)爭(zhēng)的驅(qū)使下,制造企業(yè)為了保持產(chǎn)品在市場(chǎng)上的競(jìng)爭(zhēng)力,必須縮短產(chǎn)品的設(shè)計(jì)周期和生產(chǎn)周期,傳統(tǒng)的制造方法已經(jīng)不能滿足這種市場(chǎng)需要,于是產(chǎn)生了快速成形技術(shù)。 快速成形技術(shù),是當(dāng)今世界上新型制造技術(shù)之一,最近在世界范圍內(nèi)發(fā)展很快。它是繼數(shù)控技術(shù)之后,20世紀(jì)制造領(lǐng)域的又一重大突破,是當(dāng)代先進(jìn)制造技術(shù)的重要組成部分。 面曝光快速成形技術(shù)是快速成形技術(shù)的一種,它的工作原理是,首先將繪制或者掃描得到的三維CAD模型分層,然后以DMD或者LCD在工作面成像作為動(dòng)態(tài)掩膜,對(duì)成形材料進(jìn)行曝光操作。每次曝光制作一層,逐層累加,最終生成與三維CAD模型近似的實(shí)體制件,其近似程度就是快速成形系統(tǒng)的制造精度。影響制造精度的主要因素有兩個(gè),分別是視圖發(fā)生器的光學(xué)分辨率和光敏樹脂的固化特性。 本文首先對(duì)面曝光快速成形系統(tǒng)的總體結(jié)構(gòu)做了介紹,分析了快速成形系統(tǒng)中視圖發(fā)生器的組成和基本原理,提出了一種高分辨率視圖發(fā)生器的實(shí)現(xiàn)方案,采用投影儀的DMD與物鏡一體結(jié)構(gòu),有效的避免了光軸對(duì)偏導(dǎo)致的像面光照度不均和成像失真等問題。并在此方案的基礎(chǔ)上,設(shè)計(jì)了新的光學(xué)成像系統(tǒng)。在光學(xué)成像系統(tǒng)設(shè)計(jì)的過程中,使用ZEMAX軟件確定了光闌的位置,并對(duì)成像系統(tǒng)像差進(jìn)行了優(yōu)化。經(jīng)過成像測(cè)試實(shí)驗(yàn),結(jié)果顯示其成像精度滿足面曝光快速成形的實(shí)驗(yàn)要求。 然后探討了本實(shí)驗(yàn)用光敏樹脂的成分和固化原理。通過理論分析,建立了面曝光快速成形系統(tǒng)工作面的光能量分布模型,使用高斯函數(shù)和像素光強(qiáng)累加的辦法對(duì)工作面的光強(qiáng)分布進(jìn)行描述,并建立了樹脂光固化的數(shù)學(xué)模型,在此基礎(chǔ)上計(jì)算了光敏樹脂的臨界曝光量和透射深度等參數(shù),為進(jìn)一步研究光敏樹脂的固化特性打下了基礎(chǔ)。 通過綜合光強(qiáng)分布模型和樹脂的光固化模型,預(yù)測(cè)了曝光能量、掩模寬度和固化深度,固化寬度之間的關(guān)系。通過分析實(shí)驗(yàn)數(shù)據(jù),得出光固化模型對(duì)樹脂實(shí)際固化情況模擬得較好的結(jié)論。在此基礎(chǔ)上建立了光敏樹脂的過固化模型,對(duì)過固化形成原因和影響過固化深度的因素進(jìn)行了深入研究。通過對(duì)實(shí)驗(yàn)數(shù)據(jù)的分析,找到了控制過固化深度的具體方法。 最后在本文研究的基礎(chǔ)上,制作了具有代表性的零件,來說明本研究的成果和實(shí)際意義。
[Abstract]:With the continuous increase of social demand, people's quality of life is constantly improving, and individual consumption is gradually individualized, thus putting forward new requirements for the production of industrial products. Competitiveness requires shortening the design and production cycles of products. Traditional manufacturing methods can no longer meet the needs of the market, so rapid prototyping technology has emerged.
Rapid prototyping (RP) is one of the new manufacturing technologies in the world, and it has developed rapidly in the world recently. It is another important breakthrough in the manufacturing field of the 20th century after NC technology, and it is an important part of the modern advanced manufacturing technology.
Surface exposure rapid prototyping technology is a kind of rapid prototyping technology. Its working principle is firstly to lay the 3D CAD model drawn or scanned, and then to use DMD or LCD as a dynamic mask to expose the forming material. The approximation degree of an approximate solid part is the manufacturing accuracy of a rapid prototyping system. There are two main factors affecting the manufacturing accuracy: the optical resolution of the view generator and the curing characteristics of the photosensitive resin.
Firstly, this paper introduces the overall structure of the face exposure rapid prototyping system, analyzes the composition and basic principle of the view generator in the rapid prototyping system, and puts forward a high resolution view generator implementation scheme. The DMD of the projector is integrated with the objective lens, which effectively avoids the image illumination caused by the optical axis offset. Based on this scheme, a new optical imaging system is designed. In the process of designing the optical imaging system, the position of the aperture is determined by ZEMAX software, and the aberration of the imaging system is optimized. Requirements for inspection.
Then the composition and curing principle of photosensitive resin are discussed. The light energy distribution model of the working face of the surface exposure rapid prototyping system is established by theoretical analysis. The light intensity distribution of the working face is described by the method of Gaussian function and pixel light intensity accumulation, and the mathematical model of resin curing is established. The critical exposure and transmission depth of photosensitive resin were calculated, which laid a foundation for further study of curing characteristics of photosensitive resin.
The relationship among exposure energy, mask width, curing depth and curing width was predicted by combining the light intensity distribution model with the resin curing model. By analyzing the experimental data, it was concluded that the light curing model could simulate the actual curing situation of the resin better. On this basis, the supercuring model of the photosensitive resin was established, and the super-curing model of the photosensitive resin was used for the overcuring. The formation reasons and the factors affecting the depth of overcure were studied in depth. Through the analysis of the experimental data, the concrete methods to control the depth of overcure were found.
Finally, on the basis of this study, representative parts are made to illustrate the results and practical significance of this study.
【學(xué)位授予單位】：西安工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH16
本文編號(hào)：2188544
[Abstract]:With the continuous increase of social demand, people's quality of life is constantly improving, and individual consumption is gradually individualized, thus putting forward new requirements for the production of industrial products. Competitiveness requires shortening the design and production cycles of products. Traditional manufacturing methods can no longer meet the needs of the market, so rapid prototyping technology has emerged.
Rapid prototyping (RP) is one of the new manufacturing technologies in the world, and it has developed rapidly in the world recently. It is another important breakthrough in the manufacturing field of the 20th century after NC technology, and it is an important part of the modern advanced manufacturing technology.
Surface exposure rapid prototyping technology is a kind of rapid prototyping technology. Its working principle is firstly to lay the 3D CAD model drawn or scanned, and then to use DMD or LCD as a dynamic mask to expose the forming material. The approximation degree of an approximate solid part is the manufacturing accuracy of a rapid prototyping system. There are two main factors affecting the manufacturing accuracy: the optical resolution of the view generator and the curing characteristics of the photosensitive resin.
Firstly, this paper introduces the overall structure of the face exposure rapid prototyping system, analyzes the composition and basic principle of the view generator in the rapid prototyping system, and puts forward a high resolution view generator implementation scheme. The DMD of the projector is integrated with the objective lens, which effectively avoids the image illumination caused by the optical axis offset. Based on this scheme, a new optical imaging system is designed. In the process of designing the optical imaging system, the position of the aperture is determined by ZEMAX software, and the aberration of the imaging system is optimized. Requirements for inspection.
Then the composition and curing principle of photosensitive resin are discussed. The light energy distribution model of the working face of the surface exposure rapid prototyping system is established by theoretical analysis. The light intensity distribution of the working face is described by the method of Gaussian function and pixel light intensity accumulation, and the mathematical model of resin curing is established. The critical exposure and transmission depth of photosensitive resin were calculated, which laid a foundation for further study of curing characteristics of photosensitive resin.
The relationship among exposure energy, mask width, curing depth and curing width was predicted by combining the light intensity distribution model with the resin curing model. By analyzing the experimental data, it was concluded that the light curing model could simulate the actual curing situation of the resin better. On this basis, the supercuring model of the photosensitive resin was established, and the super-curing model of the photosensitive resin was used for the overcuring. The formation reasons and the factors affecting the depth of overcure were studied in depth. Through the analysis of the experimental data, the concrete methods to control the depth of overcure were found.
Finally, on the basis of this study, representative parts are made to illustrate the results and practical significance of this study.
【學(xué)位授予單位】：西安工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH16
【引證文獻(xiàn)】
相關(guān)碩士學(xué)位論文 前1條
1 楊根;面曝光快速成形制作參數(shù)優(yōu)化研究[D];西安工程大學(xué);2012年
，本文編號(hào)：2188544
本文鏈接：http://sikaile.net/kejilunwen/jixiegongcheng/2188544.html
最近更新
教材專著
