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題名 | 快速原型加工之新的切層策略研究=A New Slicing Strategy for Layer Manufacturing Techniques |
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作者 | 廖運炫; 邱雲堯; | 書刊名 | 國立臺灣大學工程學刊 |
卷期 | 80 2000.10[民89.10] |
頁次 | 頁31-39 |
分類號 | 446.8 |
關鍵詞 | 切層法; 快速原型; 層加工技術; Slicing rules; Rapid prototyping; Layer manufacturing techniques; |
語文 | 中文(Chinese) |
中文摘要 | 現有的切層方法無法確保加工裕留量於正確位置,造成同一個工件同時產生尺寸多餘 (over-size) 或尺寸不足 (under-size) 等缺點,使後處理加工時無法獲得期望的尺寸要求。為了改善上述缺點及提昇加工效率,達到確保加工形狀的目的,本研究提出了一厚度固定的切層方法。其方法是發展一判斷準則,根據 .STL檔具備的幾何資訊,利用其中的法向量與實際工件加工方向兩者所計算的內積值,同時參考工件的用途需求,以選擇適當的切層方法並進而計算出正確的加工路徑。本研究所提出之方法適用於各種快速原型系統,尤其是普遍常用固定層厚的加工情形。由於採用固定層厚的切層法亦能獲得所欲之精度,預期本研究提出之新的切層策略亦能改善加工效率。 |
英文摘要 | The current slicing rules of most Rapid Prototyping (RP) systems can not guarantee to produce a prototype of unilateral tolerance. Such a drawback would cause the problem of over-cut and under-cut occurred simultaneously in the finished part. In order to overcome this difficulty as well as to improve the machining efficiency of the RP system, an innovated slicing strategy is proposed in this paper. The key tactic of the strategy is to set up a judgement criterion. Based on the geometric information provided by the .STL file, the inner product of the normal vector and the vector of the working direction of the part is calculated. Then, together with the expected functions and usage of the part, the inner product is used as an index for choosing the proper slicing methods and henceforth, computing the corresponding working paths. The proposed strategy has been verified by two real examples. The desired unilateral tolerance of the part is successfully obtained. The proposed strategy can be applied to various RP systems, especially to those using uniform thickness slicing rules. Since accuracy of the part can be achieved by using uniform thickness layer, improvement in machining efficiency due to less effort involved in slicing is expected. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。