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研究生:杜東憲
研究生(外文):Dong-Xian Du
論文名稱:雷射輔助加工運用於SKD-11模具鋼材料加工特性之研究
論文名稱(外文):The Study of Processing Characteristics of Laser Assisted Machining Applied to the SKD-11 Molding Tool Steel Material
指導教授:郭春寶
指導教授(外文):Chun-Pao Kuo
學位類別:碩士
校院名稱:國立中正大學
系所名稱:機械工程所
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:2006
畢業學年度:94
語文別:中文
論文頁數:124
中文關鍵詞:雷射輔助加工
外文關鍵詞:Laser Assisted Machining
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強度高、耐熱性質佳的材料,是目前工業界所共同追求的目標。不過相對的機械性質佳的材料往往都會比一般普通的材料還來的難加工處理。也因此對於越來越講求工件表面粗糙度、加工效率、加工成本的現代工業需求來說是ㄧ個重大的挑戰。他們所共同面臨的問題不外乎有採用特殊加工就必須提高加工成本,往往採用特殊加工加工時間通常會大於一般傳統式的加工方式,這是目前業界在加工技術上所面臨的難題。不過將問題回歸現實面,我們可以將現有的加工機台,透過複合式的加工理念,不需再額外的去從新設計一台全新的機台,只需在原有的設備上加上雷射設備。可以利用雷射輔助加工的熱源來達到軟化材料,讓刀具尚未接觸工件前可以有ㄧ段預熱的時間。在這短暫的加熱時間內讓材料吸收熱量達到材質軟化的程度,相變化的產生,可以確保我們的刀具接觸到的工件皆是軟性的。如此一來刀具的磨耗相對減低,對於工件表面的粗糙度也將會有大幅度的改善。由本文中實驗所得的結果有施加雷射輔助加工與未施加雷射輔助加工的表面粗糙度大約平均相差4~5倍,另外刀具的磨耗也有大幅度的減少達40~60%,這些都是雷射輔助加工所帶來的效果。
The present industry aims at pursuing for materials of great intensity and heat-resistant quality. However, the processing procedure is more difficult for materials of good mechanical quality than general one. The good mechanical quality puts a great challenge to the requirements of present industry which stress surface roughness, processing efficiency, and processing cost. Moreover, the common problem present industry faces is like enhanced processing cost as long as they use special processes.
The present industry encounters difficulty in processing skill; that is, the processing time is usually more for special processing manner than general one. Return to reality, we don’t have to design additional machine; instead, by compound processing ideas, we just have to add laser device to the original machine. Therefore, we can soften the material by the LAM. Then, there is a reserved period before the cutting tool contacts the work piece. In the short period, the material absorbs heat to be soft. The form change makes sure that the work piece the cutting tool contacts with is soft. Hence, the abrasion of the cutting tool reduces relatively, and the roughness degree of work piece surface improves largely. By the result of this experiment, the roughness of the surface is four to five times difference on average due to use LAM or not. In addition, the abrasion of the cutting tool reduces largely by 40~60%. The effects mentioned above all result from LAM.
目錄
摘要(中文) I
摘要(英文) II
目錄 IV
圖目錄 VII
表目錄 XIII
第一章 緒論
1-1 前言 1
1-2 研究目的 2
1-3 文獻回顧 3
1-4-1文獻總結 12
1-4-2國內外文獻與本人研究之比較 12
第二章 SKD11材料性質與雷射特性簡介
2-1 SKD11材料介紹與用途 14
2-2 現有的SKD-11模具鋼加工方法 19
2-3 雷射生成機制 20
第三章 切削理論
3-1 概述 24
3-2 車床加工模式 24
3-3 刀具種類 26
3-4 切屑型態基本探討 32
3-5 刀具磨耗理論 33
3-6 加工參數 35
3-7 表面粗糙度 37
第四章 溫度理論模式建立
4-1 緣由 40
4-2 模型建立 40
4-3 理論推導 43
4-4 溫度模擬分析 48
第五章 實驗與結果
5-1 實驗 52
5-2 靜態實驗 53
5-3 動態實驗 56
第六章 最佳化加工參數 80
第七章 結論與未來展望
7-1 結論 90
6-2 未來展望 94
參考文獻 95
附錄一 99
附錄二 105
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