Qualitative Research on the Irregular Stock Cutting Problem in Shipbuilding

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基本資料

Project title

Code/計畫編號

NSC101-2221-E019-041

Translated Name/計畫中文名

造船廠不規則切割問題之定性研究

Project Coordinator/計畫主持人

Wei-Chu Weng

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=2590552

Year

2012

Start date/計畫起

01-08-2012

Expected Completion/計畫迄

01-07-2013

Bugetid/研究經費

518千元

ResearchField/研究領域

機械工程

"不規則切割問題是許多工業界必然會遇到的問題，如皮革業、成衣業和造船業等。所謂不規則切割問題是探討在一大片母材上如何盡量切割出許多不規則外形的型材，而所謂不規則外形是指除了矩形之外的各種形狀，或者是有縷空的型材。與其他工業所不同的是，造船業的產品非常大，所以它所面對的不規則切割問題的型材不僅尺寸很大，甚至比母材寬度還長，且外形大凹、多變，使得所面對的不規則切割問題更複雜，這也是為什麼在造船廠，仍然依靠人力處理不規則切割問題，以手動方式在母材上安排型材。而在國際期刊中，不規則切割問題相關論文本就不多，探討造船廠的不規則切割問題的論文更是付之闕如，加上曾嘗試為造船廠的不規則切割問題實例進行電腦自動排版，結果非常不理想，因此提出本計畫。本計畫擬收集七個造船廠的不規則切割問題實例進行案例測試，並設計二階段排版法，從如何將型材分成兩大類個別排版，並且針對船廠的型材特性設計了六種法則以決定型材之排版順序，然後使用NEST 排版系統來排版，透過定性方法來了解如何安排船廠型材排版才能獲得比較好的結果。分析的結果將有助於後續排版最佳化相關研究。" "Irregular stock cutting problem is a common problem encountered in many industries such as leather, clothes and shipbuilding. The problem discusses how to arrange as many irregular shapes to be cut out from a material sheet as possible. A so called irregular shape is the one with irregular contour and/or with inner holes. When compared with the problem in other industries, the problem in shipbuilding is quite different because ships are very large products so as their shapes for the irregular stock cutting problem. That is why, so far, the nesting work is still mainly based on manpower. On the other hand, in many international journals, the papers concerning about irregular stock cutting problem are few and those concerning about the problem in shipbuilding are almost none. In addition, we had ever tried to nest one of practical problems in shipbuilding by computer and its result was terribly bad. Therefore, the project is proposed to understand the irregular stock cutting problem in shipbuilding by qualitative research. In the proposal, total seven practical instances are gathered from shipbuilding companies for case studies. NEST auto-nesting system is used as the tool. A two-stage nesting method is designed especially for the practical instances, where all shapes in every case are going to be divided into two categories by a proposed way and individually nested in different stage. In the first nesting stage, there are six sequencing rules especially designed and based for the first nesting stage. We hope to find out how to nest the shapes in shipbuilding for better results."

DSpace CRIS

Qualitative Research on the Irregular Stock Cutting Problem in Shipbuilding

基本資料

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