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研究生:蕭志峰
研究生(外文):Chih-Feng Hsiao
論文名稱:具尺寸公差之方型工件最低成本製程規劃研究
論文名稱(外文):A STUDY ON MINIMUM-COST PROCESS PLANNING FOR PRISMATIC PARTS WITH DIMENSIONAL TOLERANCES
指導教授:蔡志成蔡志成引用關係
學位類別:碩士
校院名稱:國立中興大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:73
中文關鍵詞:尺寸公差電腦輔助製程規劃方型工件製程規劃
外文關鍵詞:Dimensional ToleranceCAPPPRISMATIC PARTSprocess planning
相關次數:
  • 被引用被引用:12
  • 點閱點閱:1028
  • 評分評分:
  • 下載下載:278
  • 收藏至我的研究室書目清單書目收藏:3
公差資訊為產品生命週期之重要資訊,然而產品生產過程中,製程的安排卻決定了產品是否能滿足設計的要求,不同的製程會產生不同的產品良率及生產成本。本研究針對方形切削工件,利用工件特徵、公差資訊、機具加工精度與成本的關係提出一整合產品良率與加工成本之製程規劃方法,研究中利用工件的公差資訊與製程機具的製程能力,估算整體加工良率且考慮良率對於產品的重製所造成成本的增加,並在各加工特徵每個製程階段使用機具確定的情況下提出一合理且快速的製程規劃原則,綜合上述兩種方法據以規劃最低加工成本之製程。為證實該方法之可行性,文中並根據上述法則設計建構一最低成本製程規劃系統,利用資料庫系統及電腦高速運算能力整合加工資源與加工參數,在以製程能力分析估算良率,篩選出最小成本之製程。在製程規劃實例中發現產品良率與加工成本關係可分成四種狀況,製程的合理與否對生產成本影響差距極大,且相同的製程良率不同製程機具選擇可能造成二倍以上的成本差距。
Tolerancing data are critical information in product life cycle. However, process plan determines the quality, yield rate, and cost at production stage. In this thesis, we developed a method for process planning of prismatic parts with dimensional tolerancing (DT) specifications. The method integrates process yield rate and cost based on manufacturing features and dimensional tolerances of a part as well as accuracies of machine tools. With tolerancing information and manufacturing capability of machine tools, cost of rework due to limited yield rate is also considered as that adds to the manufacturing cost. A rule of thumb for fast process planning, when machine tools are already selected, is also used to speed up the planning process. Combining the above two methods, the least-cost process for prismatic parts can be planned. A software prototype is then designed and implemented based on the above methods as a proof of feasibility. It takes the advantage of using data bases and computation capability of a computer to integrate manufacturing resources and product DT specifications. It calculates the yield of machining processes, selects the minimum-cost processes. It is found in this thesis that the process plan with yield rate do affect production cost. Manufacturing cost of the same yield with different machine tools can be increased up to two times
目 錄
中文摘要 I
英文摘要 II
目錄 III
符號表 VI
圖目錄 VIII
表目錄 XI
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目標 4
1.3 文獻回顧 4
1.4 研究方法 6
1.5 論文大綱 7
第二章 公差與製程能力 8
2.1 製程能力 8
2.2含尺寸及公差工件之製程能力推導 9
2.2.1串聯系統與並聯系統 10
2.2.2多尺寸及公差製程能力之規劃 11
第三章 製程公差累積計算 13
3.1公差累積 13
3.2公差表 14
3.3 公差表中公差累積搜尋搜尋方法 18
3.3.1雙筆迴路法 18
3.3.2單筆迴路法 20
3.3.3深度搜尋 21
第四章製造成本探討 25
4.1 公差成本模式 25
4.2 組合製程之成本模式 27
第五章含公差零件製程規劃方法 30
5.1 零件製造特徵及公差資訊輸入 35
5.1.1特徵的判別與公差資訊輸入 35
5.1.2 工件可加工面判斷 36
5.2 製程判斷 37
5.3最佳化製程組合方法 40
第六章 系統實作 49
6.1製程規劃資訊輸入模組 53
6.2製程判別模組 56
6.3製程整合模組 57
6.4製程單輸出模組 57
6.5應用範例 59
第七章結論與未來展望 68
7.1結論與討論 68
7.2未來展望 69
參考文獻 70
附錄 73
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