高溫軸承鋼8Cr4Mo4V激光微孔加工工藝研究


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摘要進(jìn)入新世紀(jì)以來(lái)，激光技術(shù)由于其突出的非接觸，無(wú)磨損，無(wú)污染，效率高等優(yōu)點(diǎn)，在我國(guó)的制造業(yè)領(lǐng)域特別是微加工方面出現(xiàn)了快速發(fā)展的勢(shì)頭。由于激光同調(diào)性很好的特點(diǎn)，使得它應(yīng)用在硬質(zhì)合金等堅(jiān)硬材料的打孔領(lǐng)域有著普通機(jī)械加工工具無(wú)法比擬的優(yōu)勢(shì)。激光打孔是最早達(dá)到實(shí)用化的激光加工技術(shù)，也是激光加工的主要應(yīng)用領(lǐng)域之一。本論文著重研究了LASERTEC 80 PowerDrill激光器在對(duì)高溫軸承鋼8Cr4Mo4V加工微孔過(guò)程中，通過(guò)使用ANSYS軟件熱分析進(jìn)行溫度場(chǎng)模擬來(lái)研究脈沖能量以及脈沖個(gè)數(shù)參數(shù)對(duì)打孔的影響。比較分析了模擬值和實(shí)驗(yàn)值，對(duì)在高溫軸承鋼8Cr4Mo4V上打微孔提出了可行的工藝參數(shù)選擇方法。
首先，本文論述了目前國(guó)內(nèi)外激光微孔加工技術(shù)的應(yīng)用和發(fā)展，以及其特有的優(yōu)勢(shì)和必須重視其發(fā)展的原因。接著介紹了激光加工微孔的理論依據(jù)，并且通過(guò)ANSYS軟件模擬對(duì)打孔參數(shù)進(jìn)行分析，并通過(guò)實(shí)驗(yàn)進(jìn)行驗(yàn)證比較模擬值和實(shí)驗(yàn)值，得出脈沖能量、脈沖個(gè)數(shù)、重復(fù)頻率對(duì)激光打微孔的影響。

關(guān)鍵詞: 激光打孔； 溫度場(chǎng)； 模擬仿真； 有限元




Laser micro processing technology of high temperature bearing steel 8Cr4Mo4V
AbstractEntering the new century, laser technology because of its outstanding non-contact, wear-free, pollution-free, high efficiency, especially in terms of the emergence of micro-machining momentum of rapid development in the manufacturing sector in China. As the laser coherence nice features, making its application in the field of carbide and other hard materials drilling has general machining tools cannot match advantage. Laser drilling is the first practical use of laser processing technology, is one of the main applications of laser processing. In this paper focuses on the impact of high temperature bearing steel 8Cr4Mo4V laser micro machining process to study the pulse energy and pulse number of parameters through the use of thermal analysis software ANSYS simulation of the temperature field punch . Comparative analysis of the simulated and experimental values ​​of playing microspores in high temperature bearing steel 8Cr4Mo4V made ​​feasible process parameter selection methods.
First, this paper discusses the current application and development of laser micro machining technology at home and abroad, as well as its unique advantages and must pay attention to the reasons for its development. Then introduced the theory of laser micro machining, and carried out by ANSYS software simulation of drilling parameters analyzed and validated comparing simulated and experimental values ​​through experiments, pulse energy, pulse number, repetition frequency of laser micro- Effect of the hole.

Key words：laser drilling； temperature field； simulation； finite element




目錄
摘要 1
目錄 3
第一章緒論 6
1.1 概述 6
1.2 激光打孔的特點(diǎn) 6
1.2.1 激光打孔技術(shù)的概念 6
1.2.2 激光打孔技術(shù)的優(yōu)點(diǎn) 6
1.3 激光打孔技術(shù)國(guó)內(nèi)外發(fā)展現(xiàn)狀 7
1.4 激光打孔的發(fā)展趨勢(shì) 8
1.5 本論文的研究?jī)?nèi)容 10
第二章激光與物質(zhì)相互作用 12
2.1 激光加工的原理 12
2.2 激光束的描述 12
2.3 激光打孔的物理過(guò)程 14
2.4 本章小結(jié) 15
第三章溫度場(chǎng)模擬理論 17
3.1 有限元法的基本思想及特點(diǎn) 17
3.2 激光打孔的數(shù)學(xué)模型 18
3.3 激光打孔質(zhì)量的檢測(cè) 19
第四章激光打孔溫度場(chǎng)數(shù)值模擬 22
4.1 ANSYS軟件介紹 22
4.1.1 ANSYS軟件特性 22
4.1.2 ANSYS熱分析概述 23
4.1.3 ADPL語(yǔ)言簡(jiǎn)介 23
4.2 激光打孔溫度場(chǎng)模擬分析 24
4.2.1 激光打孔溫度場(chǎng)分析 24
4.2.2 激光打孔溫度場(chǎng)模擬 26
4.3 本章小結(jié) 29
第五章激光打孔實(shí)驗(yàn)工藝分析 31
5.1 激光打孔的實(shí)驗(yàn)設(shè)備 31
5.2 激光打孔主要參數(shù)對(duì)打孔質(zhì)量的影響 33
5.2.1 重復(fù)頻率對(duì)打孔質(zhì)量的影響 33
5.2.2 脈沖個(gè)數(shù)對(duì)打孔質(zhì)量的影響 36
5.2.3 離焦量對(duì)打孔質(zhì)量的影響 40
5.3 實(shí)驗(yàn)結(jié)果與模擬結(jié)果的比較 43
5.4 本章小結(jié) 44
第六章結(jié)論與心得 45
6.1 總體分析結(jié)論 45
6.2 畢業(yè)設(shè)計(jì)總結(jié)心得 45
致謝 48
參考文獻(xiàn) 49
附錄A 50
附錄B 71
附錄C 76