本文選題：增材制造 + STL模型��； 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：電弧增材制造具有沉積效率高、絲材利用率高、成本低、對零件尺寸限制少以及易于修復(fù)零件等優(yōu)點。增材制造軟件是增材制造技術(shù)中的關(guān)鍵,其中最為核心的是從工件模型到增材制造設(shè)備的模型處理和數(shù)據(jù)轉(zhuǎn)換軟件,開發(fā)用于電弧焊接系統(tǒng)的增材制造模型處理軟件,對促進增材制造技術(shù)的研究與發(fā)展有重要意義。本文對增材制造模型處理軟件中的模型載入與拓撲信息分析、模型分層切片和加工路徑規(guī)劃等核心功能做了詳細的研究。目前應(yīng)用于快速原型系統(tǒng)的標準數(shù)據(jù)接口文件是STL格式的文件,在分析了兩種不同格式的STTL文件的結(jié)構(gòu)特點后,設(shè)計了兩種格式文件的載入模塊。之后對模型數(shù)據(jù)進行了偏置,將之放置于虛擬加工空間中間位置。STL文件不包含拓撲信息,軟件設(shè)計了計算模型的三角面片鄰接拓撲信息的功能,為提高后續(xù)切片分層的效率打好了基礎(chǔ)。對STL模型直接進行切片,設(shè)計實現(xiàn)了求取切平面與模型上三角面片相交線段的算法,并進而得到了層片輪廓數(shù)據(jù)。添加了輪廓優(yōu)化功能,可以在不影響增材制造加工精度的情況下,將輪廓線中過短的微型線段去除。并開發(fā)了層片數(shù)據(jù)顯示模塊,采用C++的MFC編程中的GDI函數(shù)實現(xiàn)層片點數(shù)據(jù)的可視化。對層片輪廓進行了分區(qū)劃分,將層片分為多個獨立區(qū)域。對各個獨立區(qū)域針對不同的情況,采取了不同的路徑規(guī)劃方法,使復(fù)雜零件的層片加工難度降低:對壁厚較均勻的凸多邊形層片輪廓,主要利用了角平分線進行了點位置的偏置,得到輪廓偏置填充掃描路徑;對凹多邊形及內(nèi)部孔洞較多的層片輪廓,設(shè)計實現(xiàn)了直線往復(fù)掃描填充路徑規(guī)劃,用一系列平行直線與層片輪廓線求交得到掃描填充線段。開發(fā)了數(shù)控加工程序轉(zhuǎn)換模塊,將加工路徑輸出成能適用于多數(shù)數(shù)控焊接設(shè)備的加工指令程序文件。進行了增材制造路徑模擬及實際加工試驗,證明了本文所開發(fā)軟件功能較為完整,運行效果基本良好。
[Abstract]:Arc augmentation has the advantages of high deposition efficiency, high utilization ratio of wire, low cost, less restriction on the size of parts, and easy to repair the parts. Material augmentation manufacturing software is the key of material augmentation manufacturing technology. The core of the software is the model processing and data conversion software from workpiece model to material adding manufacturing equipment, and the model processing software is developed for arc welding system. It is of great significance to promote the research and development of material increasing manufacturing technology. In this paper, the core functions such as model loading and topology information analysis, model slicing and machining path planning are studied in detail. At present, the standard data interface file used in rapid prototyping system is STL file. After analyzing the structural characteristics of two STTL files with different formats, the loading module of two format files is designed. After that, the model data is biased and placed in the middle of the virtual machining space. STL file does not contain topology information. The software designs the function of computing the model's triangle slice adjacent topology information. It lays a good foundation for improving the efficiency of subsequent slicing. The STL model is sliced directly, and the algorithm of finding the intersection line between the cut plane and the triangle slice on the model is designed and realized, and then the contour data of the slice are obtained. The contour optimization function is added to remove the short line segments from the profile without affecting the machining accuracy. The data display module is developed, and the GDI function in MFC programming is used to realize the visualization of the data. The profile of the layer is divided into several independent regions. Different path planning methods are adopted for each independent region in order to reduce the processing difficulty of complex parts: the contour of convex polygon sheet with uniform wall thickness. The angular bisection line is mainly used to offset the point position to obtain the contour offset filling path. For the concave polygon and the slice contour with more internal holes, the linear reciprocating scan filling path planning is designed and realized. A series of parallel lines and slice contours are intersected to obtain the scanning and filling segments. The NC machining program conversion module is developed and the machining path is output to the machining instruction program file which can be applied to most NC welding equipments. The simulation of the material increasing manufacturing path and the actual processing test have proved that the software developed in this paper has relatively complete function and good running effect.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG434

【參考文獻】

相關(guān)期刊論文 前10條

1 尹博;趙鴻;王金彪;劉運鳳;馬洪文;;鈦合金電弧增材制造技術(shù)研究現(xiàn)狀及發(fā)展趨勢[J];航空精密制造技術(shù);2016年04期

2 陳樹君;趙昀;肖s，

本文編號：2047414