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International Congress on Laser Advanced Materials Processing最新文献

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Advances in laser soldering using high power diode lasers 大功率二极管激光器激光焊接的研究进展
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497952
A. Hoult, A. McLenaghan, J. Rathod
{"title":"Advances in laser soldering using high power diode lasers","authors":"A. Hoult, A. McLenaghan, J. Rathod","doi":"10.1117/12.497952","DOIUrl":"https://doi.org/10.1117/12.497952","url":null,"abstract":"Laser soldering systems have been available for many years but the recent arrival of high power direct diode systems has given a boost to the acceptance of these systems by industry. Diode lasers are now being employed in industry for a range of soldering applications, most of these are the more challenging soldering applications where the controllability of laser processing is required and the diode laser brings added benefit to these. Very little work has been published on the quality of laser soldered joints and this paper addresses this shortfall by exploring laser parameters and joint quality using a number of techniques.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130072399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Development of in-process monitoring technique in YAG laser welding YAG激光焊接过程监控技术的发展
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497924
Yasumasa Nakashima, K. Kamimuki, T. Nakabayashi, Kouichi Yoshida
{"title":"Development of in-process monitoring technique in YAG laser welding","authors":"Yasumasa Nakashima, K. Kamimuki, T. Nakabayashi, Kouichi Yoshida","doi":"10.1117/12.497924","DOIUrl":"https://doi.org/10.1117/12.497924","url":null,"abstract":"We have studied in-process monitoring technique in Nd:YAG laser welding. We used a CCD camera and a photodiode as the monitoring sensor, and observed laser processing coaxially with the laser beam. There were differences in the image of the CCD camera between full and partial penetration welding and the detection for full and partial welding was achieved by the image processing of the detected image data. And, it was suggested that a change in the focal position could be detected because a change in the luminescence intensity could be caught with the photodiode when the deviation of the focal position occurred.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134376132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Effect of laser power on clad metal in laser-TIG combined metal cladding 激光- tig复合熔覆中激光功率对熔覆金属的影响
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497595
A. Utsumi, T. Hino, J. Matsuda, Takashi Tasoda, M. Yoneda, M. Katsumura, T. Yano, T. Araki
{"title":"Effect of laser power on clad metal in laser-TIG combined metal cladding","authors":"A. Utsumi, T. Hino, J. Matsuda, Takashi Tasoda, M. Yoneda, M. Katsumura, T. Yano, T. Araki","doi":"10.1117/12.497595","DOIUrl":"https://doi.org/10.1117/12.497595","url":null,"abstract":"TIG arc welding has been used to date as a method for clad welding of white metal as bearing material. We propose a new clad welding process that combines a CO2 laser and a TIG arc, as a method for cladding at high speed. We hypothesized that this method would permit appropriate control of the melted quantity of base metal by varying the laser power. We carried out cladding while varying the laser power, and investigated the structure near the boundary between the clad layer and the base metal. Using the laser-TIG combined cladding, we found we were able to control appropriately the degree of dilution with the base metal. By applying this result to subsequent cladding, we were able to obtain a clad layer of high quality, which was slightly diluted with the base metal.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133905731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Keyhole behavior and liquid flow in molten pool during laser-arc hybrid welding 激光-电弧复合焊接过程中熔池中的锁孔行为及液体流动
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497763
Y. Naito, S. Katayama, A. Matsunawa
{"title":"Keyhole behavior and liquid flow in molten pool during laser-arc hybrid welding","authors":"Y. Naito, S. Katayama, A. Matsunawa","doi":"10.1117/12.497763","DOIUrl":"https://doi.org/10.1117/12.497763","url":null,"abstract":"Hybrid welding was carried out on Type 304 stainless steel plate under various conditions using YAG laser combined with TIG arc. During arc and laser-arc hybrid welding, arc voltage variation was measured, and arc plasma, laser-induced plume and evaporation spots as well as keyhole behavior and liquid flow in the molten pool were observed through CCD camera and X-ray real-time transmission apparatus. It was consequently found that hybrid welding possessed many features in comparison with YAG laser welding. The deepest weld bead could be produced when the YAG laser beam of high power density was shot on the molten pool made beforehand stably with TIG arc. A keyhole was long and narrow, and its behavior was rather stable inside the molten pool. It was also confirmed that porosity was reduced by the suppression of bubble formation in hybrid welding utilizing a laser of a moderate power density.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"4831 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130154210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Nd:YAG laser clad welding of titanium on steel plate 钛在钢板上的激光熔覆焊接
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497894
K. Nishimoto, H. Fujii, S. Katayama
{"title":"Nd:YAG laser clad welding of titanium on steel plate","authors":"K. Nishimoto, H. Fujii, S. Katayama","doi":"10.1117/12.497894","DOIUrl":"https://doi.org/10.1117/12.497894","url":null,"abstract":"A face welding technology of a titanium sheet on a steel plate for adding corrosion resistance was investigated. In the welding tests, 1800 W YAG laser beam was irradiated at different locations near a touching line of both plates through f:θ lens and was scanned within 13 mm width along the line at the frequency of 10 Hz, 20 Hz or 40 Hz. Twin rolls were set to load forces on both plates subjected to welding and simultaneously for pulling them out. The tensile shear test was carried out on each piece. Consequently, the highest strength was obtained at the frequency of 40 Hz. SEM observation and EDX analyses revealed that the formation of intermetallic compounds was smallest in this weld.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116082612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
New proposal for the solution of thick plates lap joint problem 解决厚板搭接问题的新方案
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497721
Naoaki Fukuda, A. Kitagawa, Yasuo Takahashi, A. Ohmori, Katsunori Inoue
{"title":"New proposal for the solution of thick plates lap joint problem","authors":"Naoaki Fukuda, A. Kitagawa, Yasuo Takahashi, A. Ohmori, Katsunori Inoue","doi":"10.1117/12.497721","DOIUrl":"https://doi.org/10.1117/12.497721","url":null,"abstract":"The strength of laser welding with lap joints depends on its welding length and width of bead at plates interface. Therefore, the narrow bead width of laser lap welding joints at plates interface forces to apply multi-times welding to get required strength. The goal of this paper is to increase interface bead width on thick plate laser lap welding. The authors turn their attention to the penetration shapes of high power CO2 laser welding for achieve that. It is well known that penetration shapes are like a wine cup in the case of deep penetration welding using high power CO2 laser. The penetration shape of the wine cup is suggested that a large amount of laser power is absorbed at the surface of the test pieces. Then, the authors have studied how to change the heat source distribution on laser lap welding, and have succeeded to increase the bead width at the interface by a new developed process.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123591171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of parameters in hybrid welding of aluminum alloy 铝合金复合焊接工艺参数的优化
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497793
T. Jokinen, Petteri Jernstroem, M. Karhu, I. Vanttaja, V. Kujanpaeae
{"title":"Optimization of parameters in hybrid welding of aluminum alloy","authors":"T. Jokinen, Petteri Jernstroem, M. Karhu, I. Vanttaja, V. Kujanpaeae","doi":"10.1117/12.497793","DOIUrl":"https://doi.org/10.1117/12.497793","url":null,"abstract":"Numerous advantages of hybrid welding, in which laser beam and arc has combined, over autogenous laser welding has been reported. Especially in case of inaccurate joint preparation or fixturing of the plates to be welded because of the filler metal added to the process through MIG-welding. Also additional heat, coming from the arc to the process, enables higher welding speed and deeper penetration. Aluminum alloy (AlMg3) was used in the experiments. Welding was carried out by using the hybrid process (combination of Nd:YAG- and MIG-welding) in the flat position. The joint preparation was carried out as shear cut and different gap widths were used. Welding experiments were made systematically using a statistical experiment procedure called TAGUCHI-method. Parameters, for example alignment of point of arc and laser, varied in experiments. Also characteristic parameters of both welding methods were changed according to the experimental procedure. In this paper results of welding experiments are reported as well as parameters used. A phenomenona of the hybrid process with aluminum is discussed and also reasons for weld defects occurred are pointed out.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123606823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
CO2 laser welding of aluminum alloys at high speeds up to 20 m/min 铝合金的CO2激光焊接，速度可达20米/分
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497789
Kunimitsu Takahashi, M. Kumagai, S. Katayama, A. Matsunawa
{"title":"CO2 laser welding of aluminum alloys at high speeds up to 20 m/min","authors":"Kunimitsu Takahashi, M. Kumagai, S. Katayama, A. Matsunawa","doi":"10.1117/12.497789","DOIUrl":"https://doi.org/10.1117/12.497789","url":null,"abstract":"CO2 laser welding of thin aluminum sheets was performed at welding speeds of up to 20 m/min to investigate the weldability, weld pool dynamics and mechanical properties of the weld bead of aluminum alloys. High-speed camera observation of weld areas showed that the thickness of the keyhole-front-face decreased to 100 μm under high-speed welding conditions and the weld pool became unstable. The focal length was optimized to increase the spot power density and thereby easily melt the aluminum sheets. Using a 76-mm focal length lens, which corresponds to 11 MW/cm2 power density, we obtained a keyhole mode weld bead with a depth of 1.3 mm at 20 m/min welding speed at 2 kW laser power. It was also possible to reduce the heat affected zone (HAZ) width to only 1.6 mm when the welding speed was 20 m/min. The HAZ width decreased as welding speed was increased. The tensile strength test of A6N01 weld beads showed that the fracture strength increased as the welding speed was increased up to 16 m/min, probably because the soft region of weld specimens was decreased. On the other hand, solidification cracks formed in the weld bead center at higher speeds, resulting in decreased strength.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132148057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Status and results of the German national diode laser research project "Modular Diode Laser Systems" (MDS) 德国国家二极管激光器研究项目“模块化二极管激光系统”(MDS)的现状与成果
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497969
F. Bachmann
{"title":"Status and results of the German national diode laser research project \"Modular Diode Laser Systems\" (MDS)","authors":"F. Bachmann","doi":"10.1117/12.497969","DOIUrl":"https://doi.org/10.1117/12.497969","url":null,"abstract":"The German national research project \"Modular Diode Laser Systems -- MDS\" is aimed to the improvement of high power semiconductor laser elements, to investigation of mounting, cooling and beam forming technologies, the integration of these elements into high power diode laser systems and finally the investigation of novel applications with such systems. Consequently, the project shows a vertical organization of three groups: \"Chip-Technology,\" \"Laser- and Systems-Technology\" and \"Processes and Applications.\" The organization as well as newest results are the content of this contribution. Besides \"conventional use\" of the high power diode laser source, applications with a \"modular\" setup of the diode laser elements will be presented. The five year project with 22 partners from research and industry is now in its fourth year.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126306146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Laser-matter interaction in laser shock processing 激光冲击加工中的激光-物质相互作用
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497617
A. Sollier, L. Berthe, P. Peyre, E. Bartnicki, R. Fabbro
{"title":"Laser-matter interaction in laser shock processing","authors":"A. Sollier, L. Berthe, P. Peyre, E. Bartnicki, R. Fabbro","doi":"10.1117/12.497617","DOIUrl":"https://doi.org/10.1117/12.497617","url":null,"abstract":"Laser shock processing (LSP) is an emerging industrial process in the field of surface treatment with particular application to the improvement of fatigue and corrosion properties. In the standard configuration, the metal sample is coated with a sacrificial layer in order to protect it from detrimental thermal effects, and a water overlay is used to improve the mechanical coupling by a confining like effect. Whereas the induced mechanical effects are now well understood, very few studies have been realized concerning the thermal effects. For this purpose, the knowledge of the confined plasma microscopic parameters has a great importance. A complete model describing the laser-liquid-metal interaction is presented. The model predicts the time evolution of the plasma parmmeters (temperature, density, ionization) and allows us to compute the induced pressure and temperature in the metal sample. By comparing the numerical results with various experimental measurements, predictions can be made concerning the best laser irradiation conditions for LSP.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125945936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
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