The Use of DANP for Evaluating the Effect of Drilling Composite Materials Using a New Special Drill

以DANP法評估新特用鑽頭於鑽削複合材料之影響

曹中丞(Chung-Chen Tsao)

《中國機械工程學刊》 38卷1期 (2017/02) Pp. 23-32

摘要

In the drilling of fiber-reinforced composites (FRCs), manufactures and studiers are obliged to use delamination-free holes. These holes can increase the in-service life of composite components under fatigue loads and save manufacturers additional repair costs. However, a finished delamination-free hole depends on the selection of appropriate cutting parameters, tool materials and geometries. A compound step-core-special drill (CSCSD) is a special tool which can generate a precise hole when drilling FRCs. This type of drill utilizes the peripheral distribution of thrust. Cutting parameter selection is a multiple criteria decision-making (MCDM) problem, which combines the decision making trial and evaluation laboratory (DEMATEL) and analytical network process (ANP) methods (referred to as DANP) to develop a new special drill for drilling FRCs. The purpose of this study is to explore how the best selection of cutting parameters can be implemented to enhance and increase the efficiency of the resources used in the new tool design process. Therefore, a CSCSD is selected as the empirical case to study how to select the proper cutting parameter to achieve the aspired levels of performance. The results show that: (1) a good relationship between CSCSD and their cutting parameters is the foundation of a finished delamination-free hole process; (2) drilling parameters (D3) play a major role in a delamination-free hole evaluation system, and have greatest effect on other dimensions; and (3) The influence criteria of feed rate (C8) and cutting velocity ratio (C9) were found to be more affecting factors on dimension of drilling parameters. The model can be extended to other new tool design fields to evaluate questions of compatibility and feasibility prior to implementing delamination-free hole processes.

關鍵字

drilling ； fiber-reinforced composites ； multiple criteria decision-making (MCDM) ； decision making trial and evaluation laboratory (DEMATEL) ； analytical network process (ANP) ； special drill

並列摘要

於纖維強化複合材料能鑽出無脫層孔(Delamination-free Hole)已成為製造業者與研究學者的責任。探究其因，係於疲勞負载下，無脫層孔可增加複合材料元件之工作壽命，且能節省製造業者其額外修復的成本。然一個鑽後無脫層孔取決於適當的切削參數(Cutting Parameters)選取及刀具材料與幾何形狀。複合特殊階梯管鑽(Compound Step-Core-Special Drill，CSCSD)是一種可以產生精密孔徑的新特用刀具，其係利用圓周分佈推力作用於纖維強化複合材料。對研發新特用鑽頭於纖維強化複合材料鑽孔而言，切削參數選取是多準則決策(Multiple Criteria Decision-Making，MCDM)的問題。而此多準則決策，係結合決策實驗室分析法(Decision Making Trial and Evaluation Laboratory，DEMATEL)與網路程序分析法（Analytic Network Process，ANP）而得，又名DANP法。而本研究目的旨在提出何種切削參數選取是最好的選擇，而經由適當的切削參數選取可加強與增加新刀具設計程序之效率。故本研究選擇複合特殊階梯管鑽當成經驗案例，以研究切削參數選取對其達成鑽削性能之渴望程度。從得到之結果顯示：(1)複合特殊階梯管鑽與其鑽削參數之間有好的關聯，是完成無脫層孔製程之基礎；(2)於無脫層孔評估系統中，鑽削參數(D3)扮演著一個重要的角色，且在其他構面(Dimensions)中有最大的影響力；(3)於鑽削參數之構面中，進給速率(C8)與切削速度比(C9)是更具有影響的準則(Criteria)因子。而此得出之模型結果，可於無脫層孔製程中，評估問題之適合性與可行性，且能擴展至其他新刀具設計的領域。