發(fā)布時(shí)間：2018-03-17 19:28

  本文選題：工藝數(shù)據(jù)處理　切入點(diǎn)：切層計(jì)算　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：激光選區(qū)熔化技術(shù)(Selective Laser Melting,SLM)利用高能量激光束選擇性地熔化粉末材料,通過(guò)逐層鋪粉、逐層熔化、逐層凝固堆積的方式實(shí)現(xiàn)復(fù)雜零件的高質(zhì)量自由成形,是一種極具發(fā)展前景和應(yīng)用優(yōu)勢(shì)的增材制造技術(shù)。作為SLM制造裝備的核心組成部分,工藝數(shù)據(jù)處理用于工藝路徑規(guī)劃、工藝參數(shù)調(diào)節(jié)、激光掃描控制等功能模塊之間的數(shù)據(jù)協(xié)同處理。全方位、多角度地實(shí)現(xiàn)激光器、掃描振鏡的便捷控制,高效、高精度地實(shí)現(xiàn)切層計(jì)算、路徑填充等工藝數(shù)據(jù)處理,不僅為自主SLM增材制造裝備的開(kāi)發(fā)提供了所必需的支撐條件,亦為新材料SLM成形工藝的研究提供了靈活可控的參數(shù)調(diào)整空間。為此,本文開(kāi)展了面向自主激光選區(qū)熔化制造裝備的工藝數(shù)據(jù)處理研究,主要成果如下:(1)提出了集切層數(shù)據(jù)處理、激光掃描控制功能于一體的SLM工藝軟件框架體系,實(shí)現(xiàn)模型數(shù)據(jù)、切層數(shù)據(jù)、加工指令之間的無(wú)縫銜接�；赩isual C++軟件開(kāi)發(fā)工具、OpenGL圖形渲染引擎搭建了 STL模型讀取、顯示及交互環(huán)境,為工藝數(shù)據(jù)處理算法的研究提供了開(kāi)發(fā)平臺(tái)。(2)分析了現(xiàn)有切層計(jì)算方法在效率和精度方面的不足,提出了基于共索引Hash映射排序策略的快速切層算法。通過(guò)構(gòu)建切層線段端點(diǎn)與所在邊或頂點(diǎn)的關(guān)聯(lián)索引值,結(jié)合相鄰切線段的有序鄰接屬性以及Hash函數(shù)直接尋址的特點(diǎn)構(gòu)建共索引映射,實(shí)現(xiàn)了散亂切層線段的線性排序。(3)針對(duì)激光器、掃描振鏡的便捷控制需求,開(kāi)發(fā)了基于RTC5卡的激光掃描系統(tǒng)控制單元。分析了 RTC5的控制流程以及跳轉(zhuǎn)命令、打標(biāo)命令對(duì)掃描質(zhì)量的影響,實(shí)現(xiàn)了激光掃描系統(tǒng)的全方位、多角度控制。(4)基于自主研制的陶瓷材料激光選區(qū)熔化試驗(yàn)平臺(tái)實(shí)現(xiàn)了工藝數(shù)據(jù)處理軟件的功能集成及性能測(cè)試,通過(guò)對(duì)比切層計(jì)算效率、振鏡掃描精度、激光器輸出質(zhì)量以及SLM成形測(cè)試驗(yàn)證了軟件功能的有效性。
[Abstract]:Selective Laser melting technique (SLM) utilizes high energy laser beam to selectively melt powder materials, and realizes the free forming of complex parts with high quality by layer coating, layer by layer melting, and layer by layer solidification accumulation. As the core part of SLM manufacturing equipment, process data processing is used in process path planning and process parameter adjustment. Laser scanning control and other functional modules of data processing. Omni-directional, multi-angle laser, scanning mirror convenient control, high-efficiency, high-precision cutting layer calculation, path filling and other process data processing, It not only provides the necessary supporting conditions for the development of the independent SLM material increasing equipment, but also provides a flexible and controllable parameter adjustment space for the study of the new material SLM forming process. In this paper, the process data processing for autonomous laser selective melting manufacturing equipment is studied. The main results are as follows: 1) A SLM process software framework which integrates the data processing of cutting layer and laser scanning control is proposed to realize the model data. Based on the Visual C software development tool and OpenGL graphics rendering engine, the STL model reading, displaying and interactive environment are built. This paper provides a development platform for the research of process data processing algorithm. It analyzes the shortcomings of the existing cutting layer calculation methods in terms of efficiency and precision. In this paper, a fast slicing algorithm based on co-index Hash mapping sorting strategy is proposed. Combined with the ordered adjacent attributes of adjacent tangent segments and the characteristics of direct addressing of Hash function, the co-index mapping is constructed, and the linear ordering of scattered tangent segments is realized, which aims at the convenient control requirements of laser and scanning mirror. The control unit of laser scanning system based on RTC5 card is developed. The control flow and jump command of RTC5 are analyzed. The effect of marking command on scanning quality is analyzed, and the omnidirectional laser scanning system is realized. Based on the laser selective melting test platform of ceramic materials, the functional integration and performance test of process data processing software are realized. The efficiency of cutting layer calculation and the scanning accuracy of vibrating mirror are compared. The laser output quality and SLM shaping test verify the effectiveness of the software.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG665

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙中民;習(xí)友寶;;三維激光掃描系統(tǒng)的固有誤差校正算法[J];激光與紅外;2016年01期

2 田宗軍;顧冬冬;沈理達(dá);謝德巧;王東生;;激光增材制造技術(shù)在航空航天領(lǐng)域的應(yīng)用與發(fā)展[J];航空制造技術(shù);2015年11期

3 史玉升;鄭友德;周鋼;;我國(guó)增材制造產(chǎn)業(yè)化實(shí)現(xiàn)路徑[J];中國(guó)工業(yè)評(píng)論;2015年05期

4 羅楠;王泉;劉紅霞;;一種快速3D打印分層方向確定算法[J];西安交通大學(xué)學(xué)報(bào);2015年05期

5 易法令;徐文華;黃展鵬;;基于STL格式三維醫(yī)學(xué)模型的可視化研究[J];北京生物醫(yī)學(xué)工程;2015年01期

6 丁紅瑜;孫中剛;初銘強(qiáng);黃潔;王豐超;;選區(qū)激光熔化技術(shù)發(fā)展現(xiàn)狀及在民用飛機(jī)上的應(yīng)用[J];航空制造技術(shù);2015年04期

7 趙志國(guó);柏林;李黎;黃建云;;激光選區(qū)熔化成形技術(shù)的發(fā)展現(xiàn)狀及研究進(jìn)展[J];航空制造技術(shù);2014年19期

8 王春香;郝志博;;快速成型技術(shù)STL模型等厚分層算法研究[J];機(jī)械設(shè)計(jì)與制造;2014年04期

9 劉杰;楊永強(qiáng);蘇旭彬;肖冬明;;多零件選區(qū)激光熔化成型效率的優(yōu)化[J];光學(xué)精密工程;2012年04期

10 胡浩;唐淳;雷軍;李建民;李密;石勇;趙娜;鄔映臣;武德勇;呂文強(qiáng);李弋;;千瓦級(jí)低透射波前畸變端抽運(yùn)板條增益模塊技術(shù)研究[J];中國(guó)激光;2012年01期

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