板金元件折彎順序與製程容差之研究｜國立臺灣科技大學博碩士論文系統

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研究生：	陳彥君 Yen-Chun Chen
論文名稱：	板金元件折彎順序與製程容差之研究 A Study of the Bending Order and the Process Tolerance of Sheet Metal Products
指導教授：	鄧昭瑞 Geo-Ry Tang
口試委員:	李維楨 Wei-Chen Lee 修芳仲 Fang-Jung Shiou
學位類別：	碩士 Master
系所名稱：	工程學院 - 機械工程系 Department of Mechanical Engineering
論文出版年：	2007
畢業學年度：	95
語文別：	中文
論文頁數：	74
中文關鍵詞：	板金、折彎順序、製程容差
外文關鍵詞：	Sheet Metal, Bending Order, Process Tolerance
相關次數：	點閱：132 下載：6
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本研究主旨為探討板金元件的折彎順序與製程容差之關係作為安排製程之依據。當板材以沖壓方式進行折彎加工時，個別折彎的製造誤差會累積於完工成品的導出尺度上。為了滿足藍圖設計尺度的規範且同時有效的安排折彎製程，本文建議以三階段的方式完成折彎順序之訂定。首先以容差基量的分析方式與折彎優先順序的指定，排除大部分無法符合藍圖容差規範的折彎順序。其次為調整誤差倍數以增加設計容差的利用。最後得到可行的折彎順序後，使用最佳化的方法進行製程容差微調，讓設計容差得到最大利用。研究過程中發展了一套電腦輔助設計程式，協助製程設計者擇定合適的施工順序並藉由使用最佳化模組使藍圖設計容差獲得最大利用。

The purpose of this thesis is studying the relationship between a bending order and the process tolerances of sheet metal products. When the sheet metal is punched, the manufacturing errors of bending will be accumulated in the resultant dimensions of a product. In order to meet the requirements of blueprints and to assign the process tolerances effectively, it is proposed a design of bending processes in three stages. In the first stage, unsatisfied bending sequences will be excluded through the analysis of basic tolerance and assignment of process priority. Secondly, the error multiplier will be adjusted to increase of using an available tolerance budget. After getting the feasible bending order, the process tolerances can be tuned by the optimal method to get the maximum usage of blueprint tolerances. In this study, the computer aided design program was used to help process engineers to choose a suitable bending order and design process tolerances.

摘要................................I
Abstract...........................II
誌謝..............................III
目錄...............................IV
圖索引............................VII
表索引..............................X
第一章 緒論.........................1
1. 1 前言.........................1
1. 2 文獻回顧.....................2
1. 3 研究方法.....................3
1. 4 本文架構.....................4
第二章 板金製程與設計圖.............5
2. 1 板金加工製程.................5
2. 1. 1 塑性變形................5
2. 1. 2 板金展開總長計算........6
2. 2 板金設計藍圖.................7
2. 2. 1 尺度標註................7
2. 2. 2 導出尺度................9
2. 2. 3 基準轉換...............10
2. 3 板金製程簡圖................12
2. 3. 1 板金折彎部分補償值.....12
2. 3. 2 板金厚度補償值.........13
2. 3. 3 施工長度補償值.........14
2. 3. 4 簡圖範例...............15
第三章 板金容差分析................17
3. 1 施工誤差....................17
3. 1. 1 施工誤差種類...........17
3. 1. 2 加工類型與剪裁誤差.....18
3. 2 製程誤差累積................19
3. 3 製程容差分配................22
3. 3. 1 製程容差基量...........22
3. 3. 2 容差基量之計算.........25
第四章 板金折彎順序................28
4. 1 折彎順序搜尋................28
4. 1. 1 狀態空間...............29
4. 1. 2 折彎順序之樹狀展開.....29
4. 2 反向折彎順序................30
4. 3 板金約束條件................31
4. 3. 1 誤差允數的分配.........31
4. 3. 2 剪裁誤差的累積.........36
4. 3. 3 折彎順序的選擇.........37
4. 4 反向折彎搜尋步驟............38
4. 5 折彎展開範例................41
4. 6 誤差倍數調整................44
4. 7 製程容差最佳分配............48
第五章 折彎製程規劃系統............50
5. 1系統架構.....................50
5. 2系統介面說明.................52
第六章 結論與未來展望..............58
參考文獻...........................60
附錄A..............................63
附錄B..............................70
作者簡介...........................74

                                

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