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博碩士論文 etd-0811106-153336 詳細資訊
Title page for etd-0811106-153336
論文名稱
Title
適用於軸對稱表面拋光之刀具創新設計
A novel design of polishing tool for axially symmetrical surface
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
143
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2006-06-28
繳交日期
Date of Submission
2006-08-11
關鍵字
Keywords
彈塑性刀具、凹凸錐面之軸對稱工件、組合曲面、快速原型機、有限元素分析、幾何型態可調
adjusting its geometric feature of structure, finite element method, convex and concave symmetrical surface, combined surface
統計
Statistics
本論文已被瀏覽 5697 次,被下載 1869
The thesis/dissertation has been browsed 5697 times, has been downloaded 1869 times.
中文摘要
本論文針對組合曲面中幾何特徵為凹凸錐面之軸對稱工件,發展出新型拋光刀具。此刀具的功能除了能產生拋光行為,還擁有高壽命之特質;另外,透過幾何型態可調之刀具結構,可針對尺寸、錐度不同的工件作拋光,以達到有效率以及可控性的拋光行為。論文中將利用一套思考邏輯之方法,找尋可達到上述設計目標之拋光刀具的概念設計。此拋光刀具系統之架構,分為兩部分,其一,具有彈性之結構,該結構除了可隨工件調整其幾何型態,還兼具負載控制之功能;其二,滾筒狀之滾子刀具,該滾子兼具轉速可調以及磨耗不易影響加工率之特質。拋光刀具系統則是利用快速原型機與粗糙ABS材料精確製作出的彈塑性刀具。其結構之變形特徵分析與尺寸設計,藉由有限元素軟體以完成;另外,完成一套簡易拋光加工機之設計及組裝,以方便規劃系統性的實驗;也驗證本拋光刀具系統的可行性、重現性以及可控性。由實驗結果探討可知,本拋光系統具有不錯的加工重現性。另外,透過刀具磨耗實驗結果證明,本拋光系統的加工率確實不敏感於刀具的磨耗,且刀具的曲率半徑變化量不大,對於加工重現性的掌握及經濟上的考量是極有利的。最後,經由負載以及轉速效應實驗證實,本拋光系統之加工率分佈與液動壓拋光法具有相當之一致性。
Abstract
This thesis is to develop a novel polishing tool system fitted for convex and concave symmetrical surface of combined surface. There are two design goals in this system. First, this system can be used to polish a concave or convex cone surface with various dimensions and angle cones by adjusting its geometric feature of structure. Second, this polishing tool is expected to have high life expectancy in real applications. Because of the advantages, an efficiency and controllable polishing system would be developed.An inference process, based on a top-down planning strategy, was used to obtain the concept design of polishing tool. There are two major parts in the structure of polishing tool system. The first one is its elastic structure. Both its geometric configuration and loading applied at work are adjustable. The second one is the polishing tool of cylindrical shape. With this specific geometric feature, the effect of tool wear on polishing rate is minimized. The finite element method was adopted to analyze the deformation characteristics of the elastic structure. Accordingly, an optimal design about the shape and dimension of elastic structure was determined. The experimental study showed that the developed polishing system had the property of high repeatability in machining rate. It was also demonstrated that the machining rate of system was insensitive to the tool wear during the polishing process. This advantage may allow this system to gain significant benefit in reducing the need of tool replacement. Finally, it was shown that the experimental trends of machining rate due to the change of applied load or polishing speed followed that of cylindrical polishing system. Both of them can be properly predicted based on the lubricating theories.
目次 Table of Contents
謝誌…………………………..……………………………...………………………..I
目錄……………………………………………………………..…….......................II
圖索引…………………………………………………………….………………..IV
表索引…………………………………………………………..………………...VII
中文摘要..………………………………………………………….……………VIII
Abstract..………………...………………………………………….…...................IX
第一章 緒論………………………………………………………........................1
1-1研究動機與方法………………………………………………………1
1-2現有拋光法之回顧……………………………….…………...............3
1-3內容介紹……………………………………...………………………...4

第二章 點、線、面液動壓拋光法之特性探討…………………….………..5
2-1不同加工潤滑區對加工率之影響......…………………….……….5
2.1.1半接觸潤滑區之液動壓加工理論……….……………..…6
2.1.2非接觸潤滑區之液動壓加工理論…………………..…….7
2-2液動壓拋光之點、線、面拋光特性簡介….……………….………9

第三章 凹、凸錐面工件之拋光刀具概念設計…………………………..13
3-1好的拋光刀具系統之概念...............................................................13
3-1.1 可發生拋光行為…………………………………….............13
3-1.2 擁有高效率之拋光行為……………………………………15
3-1.3 擁有可控性之拋光行為………………………………17
3-2 好的拋光刀具系統之要件………………………………….18
3-2.1刀具幾何形狀之設計目標…..……………………………..15
3-2.2刀具系統運動規劃之設計目標……………………….17
3-3 初步概念設計……………………………………………….20
3-4 尺寸可變形與可量測負載之結構概念設計………….……25
3-5 滾子阻力設計之思考邏輯………………………..………...27
3-6 製造方法的選擇與注意事項…………………………….. ..30

第四章 刀具結構特性之有限元素法設計……………………………….31
4-1 負責尺寸變形結構設計…………………………………… 31
4-1.1刀具幾何形狀之決定………………………………….32
4-1.2尺寸分析……………………………………………….32
4-1.3扇形結構分析與設計………………………………….33
4-2 負責控制拋光加工率之負載控制結構設計.........................37
4-2.1矩形截面………………………………………….……38
4-2.2決定較佳的矩形截面尺寸……………………….……38
4-3 拋光刀具的結構外型與尺寸以及可變形範圍…………….40

第五章 拋光特性之實驗分析………………………………………..41
5-1 實驗規畫…………………………………………………… 41
5-2 實驗與量測設備…………………………………………….43
5-2.1 實驗系統簡介……………………………………..…..43
5-2.2 實驗材料與量測設備之介紹……………………..…..45
5-3 實驗結果與討論…………………………………………….46

第六章 總結與未來展望……………………………………………..48
6-1 各章之總結………………………………………………….48
6-2 未來展望…………………………………………………….49
參考文獻 ……..………………………………………………………..51
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