發(fā)布時間：2018-12-23 09:07

【摘要】：3D打印技術(shù)是最近二十年來制造業(yè)最熱門的技術(shù),被稱為新一代的工業(yè)革命。3D打印技術(shù)由于其數(shù)字化、小批量、個性化制造,縮短了產(chǎn)品的研發(fā)周期,提高了生產(chǎn)效率,更好地滿足了現(xiàn)代社會需求。在工業(yè)制造領(lǐng)域內(nèi),3D打印技術(shù)得到了飛速的發(fā)展和廣泛的應(yīng)用,但是,3D打印也有一些不足,成型精度不高、成型效率低、力學(xué)性能不高。FDM成型工藝是3D打印技術(shù)中較常見的一種成型工藝,具有設(shè)備便宜、材料環(huán)保、較易推廣等優(yōu)點(diǎn),然而,產(chǎn)品的翹曲變形和臺階效應(yīng)等缺點(diǎn)還是很難避免。本文通過對FDM成型工藝進(jìn)行分析,著重研究了不同掃描路徑對制造產(chǎn)品的成型精度和成型效率的影響。主要研究內(nèi)容如下:(1)本文介紹了 FDM成型工藝過程的幾種基本掃描路徑。掃描路徑分別是:往復(fù)直線掃描、偏置掃描、分層掃描和復(fù)合掃描等。實(shí)現(xiàn)了對往復(fù)直線掃描和偏置掃描的計算算法;復(fù)合掃描是由這兩種掃描相結(jié)合,算法也類似。(2)對重要的工藝參數(shù)進(jìn)行理論分析和數(shù)值仿真,不同的打印溫度、掃描速度、層厚對成型精度和成型效率的影響。利用ANSYS的熱—結(jié)構(gòu)耦合分析,得出打印溫度、層厚等工藝參數(shù)的選擇要適度。(3)本文利用ANSYS分析軟件,以長方體模型為例,探索對幾種不同的掃描路徑分別進(jìn)行了數(shù)值模擬的方法。通過對不同的掃描路徑進(jìn)行ANSYS熱分析和結(jié)構(gòu)分析,使用APDL腳本語言編寫代碼程序,得到模型節(jié)點(diǎn)的溫度梯度變化和應(yīng)力分布。分析得出不同掃描路徑對成型精度變化規(guī)律,成型精度最好的是內(nèi)外混合偏置掃描,成型效率和成型精度都較好的是復(fù)合掃描,為實(shí)際應(yīng)用提供一定意義的參考。(4)對不同工藝參數(shù)和填充路徑進(jìn)行實(shí)驗(yàn)研究,以長方體為例作為3D打印制造模型,測量模型的絕對翹曲值。
[Abstract]:3D printing technology is the most popular technology in the manufacturing industry in the last two decades, it is called the new generation of industrial revolution. 3D printing technology has shortened the product research and development cycle and improved the production efficiency because of its digitization, small batch, individualized manufacture. Better meet the needs of modern society. In the field of industrial manufacturing, 3D printing technology has been rapidly developed and widely used. However, 3D printing also has some shortcomings, such as low precision and low efficiency. The mechanical properties are not high. FDM molding technology is a common forming process in 3D printing technology, which has the advantages of cheap equipment, environmental protection of materials and easy to be popularized. However, it is difficult to avoid the disadvantages of warpage and step effect of the products. Based on the analysis of FDM forming process, the influence of different scanning paths on the forming accuracy and forming efficiency of manufacturing products is studied. The main contents are as follows: (1) this paper introduces several basic scanning paths of FDM molding process. Scanning paths are: reciprocating linear scan, offset scan, stratified scan and composite scan. The calculation algorithm of reciprocating line scanning and offset scanning is realized. Composite scanning is a combination of these two scans and the algorithm is similar. (2) theoretical analysis and numerical simulation of important process parameters, different printing temperature, scanning speed, layer thickness on the forming accuracy and efficiency. By using the thermal-structural coupling analysis of ANSYS, it is concluded that the selection of process parameters such as printing temperature and layer thickness should be moderate. (3) in this paper, the cuboid model is taken as an example by using ANSYS analysis software. Several methods for numerical simulation of different scanning paths are explored. By ANSYS thermal analysis and structural analysis of different scanning paths, the temperature gradient and stress distribution of model nodes are obtained by using APDL script language to write code programs. The analysis shows that different scanning paths change the forming accuracy, the best one is the internal and external mixed bias scanning, and the best one is the compound scanning, which has better forming efficiency and precision. It provides a reference for practical application. (4) the experimental study of different process parameters and filling paths is carried out. The cuboid is taken as a 3D printing manufacturing model to measure the absolute warping value of the model.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP391.73

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 高善平;;基于穩(wěn)健設(shè)計的FDM成型件尺寸精度的優(yōu)化分析[J];現(xiàn)代制造技術(shù)與裝備;2016年05期

2 王占禮;晁艷艷;胡艷娟;任天猛;;改進(jìn)的Hilbert曲線在FDM路徑規(guī)劃中的應(yīng)用[J];機(jī)械設(shè)計與制造;2016年03期

3 余世浩;周勝;;3D打印成型方向和分層厚度的優(yōu)化[J];塑性工程學(xué)報;2015年06期

4 朱靜;伍馮潔;韓曉英;黃文愷;吳羽;;淺談FDM打印機(jī)的誤差分析與3D模型質(zhì)量優(yōu)化[J];東莞理工學(xué)院學(xué)報;2015年05期

5 董潔;衡良;殷國富;;桌面級3D打印技術(shù)及其發(fā)展趨勢[J];信息技術(shù)與標(biāo)準(zhǔn)化;2015年06期

6 劉鑫;余翔;張奔;;中美3D打印技術(shù)專利比較與產(chǎn)業(yè)發(fā)展對策研究[J];情報雜志;2015年05期

7 林忠威;黃常標(biāo);王澤昊;;平面輪廓的螺旋填充軌跡生成算法[J];計算機(jī)工程與應(yīng)用;2015年18期

8 柳建;雷爭軍;顧海清;李林岐;;3D打印行業(yè)國內(nèi)發(fā)展現(xiàn)狀[J];制造技術(shù)與機(jī)床;2015年03期

9 巢海遠(yuǎn);劉景;童晶;張霞;;一種提高FDM三維打印系統(tǒng)成型效率的算法[J];微處理機(jī);2014年06期

10 劉利剛;徐文鵬;王偉明;楊周旺;劉秀平;;3D打印中的幾何計算研究進(jìn)展[J];計算機(jī)學(xué)報;2015年06期

相關(guān)博士學(xué)位論文 前1條

1 紀(jì)良波;熔融沉積成型有限元模擬與工藝優(yōu)化研究[D];南昌大學(xué);2011年

相關(guān)碩士學(xué)位論文 前2條

1 曹一青;基于TRIZ理論的熔融沉積快速成型技術(shù)優(yōu)化研究[D];內(nèi)蒙古科技大學(xué);2013年

2 孫建平;快速成型加工的自適應(yīng)分層及冗余數(shù)據(jù)的優(yōu)化處理研究[D];北京化工大學(xué);2006年

，

本文編號：2389750