Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining
碩士 === 中原大學 === 機械工程研究所 === 99 === Compared with mechanical machining, laser machining is with the characteristics of non-contact, no residual chips, no cleaning needed, and more accurate. However, because nanosecond laser is a long pulse laser, it usually induces thermal effects which will deterior...
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ndltd-TW-099CYCU54890432015-10-13T20:23:26Z http://ndltd.ncl.edu.tw/handle/18398132170373078140 Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining Nd: YVO4 雷射應用於精微加工之特性分析 Chin-Ling Tai 戴金玲 碩士 中原大學 機械工程研究所 99 Compared with mechanical machining, laser machining is with the characteristics of non-contact, no residual chips, no cleaning needed, and more accurate. However, because nanosecond laser is a long pulse laser, it usually induces thermal effects which will deteriorates the machining accuracy and the material properties of the workpiece. Thus, it is very important to develop a method to minimize the influence of the thermal effect. In the research, the influence of processing parameters of nanosecond laser processing, laser power, and pulse energy on the machining performance and material properties was first explored. Subsequently, curve fitting method was applied to develop a method to obtain optimal processing parameters for deeper groove and minimized recast layer. Furthermore, the water-assisted method was added, and the results have shown that it can have 17 times machining depth than having laser processing in air. Besides, it also significantly decreases the thermal effect. By observing the morphology and topography of the machined workpiece, it was found that there was almost not a crater and a layered structure. The proposed method provides high surface quality, good accuracy, deeper depth, and good stability for nanosecond laser processing. It makes nanosecond laser processing more suitable for micro machining application with the advantages of low cost and use in simple surroundings. Shih-Ming Wang 王世明 2011 學位論文 ; thesis 182 zh-TW |
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碩士 === 中原大學 === 機械工程研究所 === 99 === Compared with mechanical machining, laser machining is with the characteristics of non-contact, no residual chips, no cleaning needed, and more accurate. However, because nanosecond laser is a long pulse laser, it usually induces thermal effects which will deteriorates the machining accuracy and the material properties of the workpiece. Thus, it is very important to develop a method to minimize the influence of the thermal effect. In the research, the influence of processing parameters of nanosecond laser processing, laser power, and pulse energy on the machining performance and material properties was first explored. Subsequently, curve fitting method was applied to develop a method to obtain optimal processing parameters for deeper groove and minimized recast layer. Furthermore, the water-assisted method was added, and the results have shown that it can have 17 times machining depth than having laser processing in air. Besides, it also significantly decreases the thermal effect. By observing the morphology and topography of the machined workpiece, it was found that there was almost not a crater and a layered structure. The proposed method provides high surface quality, good accuracy, deeper depth, and good stability for nanosecond laser processing. It makes nanosecond laser processing more suitable for micro machining application with the advantages of low cost and use in simple surroundings.
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author2 |
Shih-Ming Wang |
author_facet |
Shih-Ming Wang Chin-Ling Tai 戴金玲 |
author |
Chin-Ling Tai 戴金玲 |
spellingShingle |
Chin-Ling Tai 戴金玲 Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
author_sort |
Chin-Ling Tai |
title |
Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
title_short |
Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
title_full |
Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
title_fullStr |
Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
title_full_unstemmed |
Characteristics Analysis of Using Nd: YVO4 Laser for Micro Machining |
title_sort |
characteristics analysis of using nd: yvo4 laser for micro machining |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/18398132170373078140 |
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