研究生: |
周敬誠 Ching-cheng Chou |
---|---|
論文名稱: |
快速原型系統適應性體積誤差率切層法之研究 The Study of a Volumetric Error-based Adaptive Slicing in Rapid Prototyping |
指導教授: |
邱士軒
Shih-hsuan Chiu |
口試委員: |
李俊毅
Chun-yi Li 邱顯堂 Hsien-tang Chiu 周國村 Kuo-tsun Chou 鄭國彬 Kuo-pin Cheng |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 72 |
中文關鍵詞: | 適應性切層 、層製造 、快速原型 |
外文關鍵詞: | RP, LM, adaptive slicing |
相關次數: | 點閱:266 下載:5 |
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快速原型(Rapid Prototyping)技術是以疊層製造(Layered Manufacturing)的方式來製造工件。CAD模型切層後,可將其分為切層區塊與誤差區塊,階梯效應為誤差區塊產生的主因,階梯效應越大會使得建構工件與原CAD模型在表面精確度造成較大的差異。目前所提出的適應性切層法,大多數是以Cusp Height為基礎,但它並不能有效的降低階梯效應。本研究先計算切層封閉輪廓面積,並進一步求得切層區塊與誤差區塊體積,最後以誤差區塊體積來決定切層厚度,可有效將階梯效應最小化。在模擬實驗中,利用本研究所提之方法,與Cusp Height適應切層法做體積差異之比較,由結果可知,運用體積誤差率為指標,可得到一個精確度較高的適應性切層,使得加工時的精度更準確,並獲得愈趨近於原CAD模型的實體。
Rapid Prototyping(RP) is based on layered manufacturing(LM). The actual slice of the original CAD model can be divided into two parts, one is the sliced part and the other is the difference part. The staircase effect gives rise to difference part. The higher staircase effect causes the more difference of surface precision between the CAD model and the part produced by the RP machine. Nearly all the reported adaptive slicing algorithms are based on the Cusp Height. But the Cusp Height may not be the best representative of the staircase effect in same cases. This paper uses Surveyor’s Area Formula to calculate the close contour area, and then gets the sliced part area and difference part area. Then the difference part was used to determine the last sliced thickness to minimize the staircase effect. In this paper, we use the method to compare with adaptive slicing based on Cusp Height upon area differences. We found that by using this method, we can improve the precision while slicing, and make the part produced by the RP machine nearly the original CAD model as possible.
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