基于FDM的低熔點(diǎn)金屬牙模制備方法研究
本文選題:3D打印技術(shù) + FDM成型技術(shù); 參考:《蘭州理工大學(xué)》2017年碩士論文
【摘要】:3D打印技術(shù)經(jīng)過(guò)近幾年的發(fā)展已經(jīng)越來(lái)越多的被應(yīng)用到生產(chǎn)制造領(lǐng)域,3D打印技術(shù)以“增材制造”技術(shù)為原理,突破了傳統(tǒng)制造技術(shù)的許多限制,在復(fù)雜零件、快速模具制作、創(chuàng)新設(shè)計(jì)等方面有著傳統(tǒng)制造技術(shù)方法無(wú)法比擬的優(yōu)勢(shì),尤其在模具開(kāi)發(fā)與快速模具制作方面得到了廣泛應(yīng)用。熔融沉積快速成型技術(shù)(FDM)作為最基礎(chǔ)的3D打印技術(shù),目前已得到廣泛應(yīng)用,FDM成型技術(shù)可以將三維幾何模型快速、準(zhǔn)確的轉(zhuǎn)化為具有一定功能的原型件。本課題以FDM成型技術(shù)為基礎(chǔ),并以低熔點(diǎn)金屬材料為打印材料,制作具有一定精度且可用于熔模鑄造的低熔點(diǎn)金屬牙齒模型。重點(diǎn)對(duì)低熔點(diǎn)金屬材料打印方法、成型過(guò)程中絲材的受力分析、噴頭溫度場(chǎng)分布情況、噴頭出口壓強(qiáng)分布情況、低熔點(diǎn)金屬牙模制備方案和牙模成型質(zhì)量進(jìn)行了相關(guān)分析與研究。本文首先從理論上分析了FDM成型技術(shù)的供絲與出絲過(guò)程,在此基礎(chǔ)上對(duì)打印過(guò)程中絲材的受力情況進(jìn)行了理論分析,得出進(jìn)給力與擠出阻力的數(shù)學(xué)模型;同時(shí)分析了溫度對(duì)絲材受力情況的影響機(jī)理,得出有溫度場(chǎng)影響時(shí)進(jìn)給力與擠出阻力的數(shù)學(xué)模型。并通過(guò)ANSYS Workbench有限元分析軟件對(duì)打印過(guò)程中噴頭溫度場(chǎng)分布情況、噴頭出口處壓強(qiáng)分布情況做了仿真研究,計(jì)算得到具體的進(jìn)給力與擠出阻力。通過(guò)相關(guān)分析與計(jì)算,得出低熔點(diǎn)金屬材料打印溫度的確立方法。其次,對(duì)幾何模型格式轉(zhuǎn)換誤差、分層誤差、成型系統(tǒng)誤差、材料收縮率導(dǎo)致的誤差、噴頭部分導(dǎo)致的誤差以及后處理誤差等因素的形成機(jī)制與相關(guān)計(jì)算方法進(jìn)行了分析,并提出通過(guò)減小STL弦高及分層厚度、選用低收縮率絲材、合理選擇噴頭溫度以及合理匹配出絲速度與填充速度等來(lái)提高牙模成型質(zhì)量。最后,對(duì)打印過(guò)程中的重點(diǎn)參數(shù)設(shè)置方案進(jìn)行了相關(guān)分析,主要包括分層厚度的設(shè)置、打印溫度的設(shè)置、擠出速度與填充速度的設(shè)置以及輪廓補(bǔ)償設(shè)置等。通過(guò)三維設(shè)計(jì)軟件建立牙齒模型并進(jìn)行分層處理,最終以低熔點(diǎn)金屬絲材為打印材料,通過(guò)FDM成型技術(shù)制得低熔點(diǎn)金屬牙齒模型,并對(duì)不同打印溫度與分層厚度下的成型質(zhì)量進(jìn)行了對(duì)比分析和評(píng)價(jià)。
[Abstract]:Through the development of 3D printing technology in recent years, 3D printing technology has been applied more and more in the field of production and manufacturing. The principle of 3D printing technology is "material increasing manufacture" technology, which breaks through many limitations of traditional manufacturing technology and makes complex parts and rapid die making. Innovative design has unparalleled advantages in traditional manufacturing technology, especially in mould development and rapid mold making. As the most basic 3D printing technology, the fused deposition Rapid Prototyping (FDM) technology has been widely used to transform 3D geometric models into prototypes with certain functions. Based on FDM technology and low melting point metal material, a low melting point metal tooth model with certain precision and can be used in investment casting is made. Focusing on the printing method of low melting point metal material, the stress analysis of wire during forming, the distribution of spray head temperature field, the distribution of nozzle outlet pressure, The preparation of low melting metal molds and the quality of molds were analyzed and studied. In this paper, firstly, the feeding and drawing process of FDM forming technology is analyzed theoretically. Based on this, the force of wire in printing process is analyzed theoretically, and the mathematical model of feed force and extrusion resistance is obtained. At the same time, the influence mechanism of temperature on the stress of wire is analyzed, and the mathematical model of feed force and extrusion resistance under the influence of temperature field is obtained. Through ANSYS Workbench finite element analysis software, the distribution of nozzle temperature field and the pressure distribution at nozzle outlet are simulated, and the specific feed force and extrusion resistance are calculated. Through correlation analysis and calculation, the method of determining the printing temperature of low melting point metal material is obtained. Secondly, the formation mechanism and calculation methods of geometric model format conversion error, layering error, molding system error, material shrinkage error, nozzle part error and post-processing error are analyzed. It is proposed to improve the quality of tooth die by reducing STL chord height and delamination thickness, selecting low shrinkage silk material, reasonably selecting nozzle temperature and matching wire speed and filling speed. Finally, the key parameter setting scheme in the process of printing is analyzed, including the setting of layer thickness, the setting of printing temperature, the setting of extrusion speed and filling speed, and the setting of contour compensation. The tooth model was built by 3D design software, and the low melting point metal wire was used as printing material, and the low melting point metal tooth model was made by FDM technology. The molding quality under different printing temperature and delamination thickness is analyzed and evaluated.
【學(xué)位授予單位】:蘭州理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TG241
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 宋彬;崔聿辰;李雨;施利進(jìn);駱建權(quán);張志峰;;3D打印技術(shù)和鑄造模擬技術(shù)在精密鑄造生產(chǎn)中的應(yīng)用[J];金屬加工(熱加工);2016年19期
2 劉樹文;傅駿;葉珍珍;殷國(guó)富;;基于熔融沉積技術(shù)的汽輪機(jī)葉片熔模鑄造生產(chǎn)[J];熱加工工藝;2015年23期
3 周婧;段國(guó)林;盧林;蔡瑾;孫迎建;;義齒快速成型制作技術(shù)研究現(xiàn)狀及發(fā)展趨勢(shì)[J];機(jī)械設(shè)計(jì);2015年09期
4 唐通鳴;張政;鄧佳文;錢素艷;李志揚(yáng);黃明宇;;基于FDM的3D打印技術(shù)研究現(xiàn)狀與發(fā)展趨勢(shì)[J];化工新型材料;2015年06期
5 毛珍娥;石永吉;;3D打印技術(shù)在口腔義齒制作領(lǐng)域的應(yīng)用及人才培養(yǎng)對(duì)策[J];中國(guó)衛(wèi)生產(chǎn)業(yè);2015年09期
6 談耀文;王永信;;基于光固化成形的快速熔模鑄造組樹方法[J];熱加工工藝;2015年05期
7 傅駿;向召偉;鄧珍波;殷國(guó)富;;基于熔融沉積技術(shù)的快速熔模鑄造工藝實(shí)踐[J];金屬世界;2015年01期
8 劉歡歡;劉佑年;葉升平;;基于3D設(shè)計(jì)及FDM快速成型的編鐘鑄造實(shí)踐[J];鑄造設(shè)備與工藝;2014年03期
9 張建平;高飛;王玲玲;;快速成型技術(shù)在熔模精密鑄造中的應(yīng)用[J];新技術(shù)新工藝;2014年03期
10 傅駿;王澤忠;方輝;殷國(guó)富;;3D打印技術(shù)及其在鑄造中應(yīng)用現(xiàn)狀與發(fā)展展望[J];中小企業(yè)管理與科技(下旬刊);2014年03期
相關(guān)博士學(xué)位論文 前2條
1 曹馳;鋅基合金模具快速制造關(guān)鍵技術(shù)研究[D];蘭州理工大學(xué);2009年
2 鄒國(guó)林;熔融沉積制造精度及快速模具制造技術(shù)的研究[D];大連理工大學(xué);2002年
相關(guān)碩士學(xué)位論文 前10條
1 李生鵬;熔融沉積成型零件精度及機(jī)械性能研究[D];中國(guó)礦業(yè)大學(xué);2015年
2 張自強(qiáng);基于FDM技術(shù)3D打印機(jī)的設(shè)計(jì)與研究[D];長(zhǎng)春工業(yè)大學(xué);2015年
3 肖亮;3D打印擠出機(jī)熱力學(xué)分析及結(jié)構(gòu)優(yōu)化設(shè)計(jì)[D];西安工程大學(xué);2015年
4 張培;基于快速成型的三維模型數(shù)據(jù)處理技術(shù)研究[D];河南科技大學(xué);2013年
5 包寬亮;生物降解材料流變性能的研究[D];北京化工大學(xué);2013年
6 倪榮華;熔融沉積快速成型精度研究及其成型過(guò)程數(shù)值模擬[D];山東大學(xué);2013年
7 陳葆娟;熔融沉積快速成形精度及工藝實(shí)驗(yàn)研究[D];大連理工大學(xué);2012年
8 張媛;熔融沉積快速成型精度及工藝研究[D];大連理工大學(xué);2009年
9 趙仕平;FDM導(dǎo)絲機(jī)構(gòu)及控制系統(tǒng)研究[D];華中科技大學(xué);2009年
10 成丹;基于快速成型技術(shù)的精密鑄造石膏型熔模研究[D];重慶大學(xué);2008年
,本文編號(hào):1995255
本文鏈接:http://sikaile.net/kejilunwen/jiagonggongyi/1995255.html