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Effects of filler wire feed on the efficiency of laser welding 填料送丝对激光焊接效率的影响
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497889
A. Salminen
{"title":"Effects of filler wire feed on the efficiency of laser welding","authors":"A. Salminen","doi":"10.1117/12.497889","DOIUrl":"https://doi.org/10.1117/12.497889","url":null,"abstract":"The range of laser welding applications is widening from applications in car manufacturing to normal machine building. Laser welding has suffered from the tight demands for component and joint manufacture. This investigation studies the effect of various welding and filler wire feed variables on the weld quality and efficiency of the laser welding process. Welding was found to be possible with several parameter combinations and the width of air gap used was 1 mm, when the material thickness was 6 mm. The utilization of filler wire feed introduces some new parameters to the laser welding process. There is a noticeable effect from the wire feed position and feed angle on the welding process. The variations, like lack of penetration, of weld quality, was caused by inaccurate positioning of filler wire and can be compensated by the adjustment of the filler wire feed rate and the energy input to some extent. The efficiency of laser welding with filler wire is equal to that of autogenous welding, but the overall energy input must be increased according to the air gap volume. Filler wire feed provides the process with less stringent demands, but requires additional energy input to the workpiece.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"57 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":"120943569","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: 27
Putting fundamentals on multiphase material balance of laser based cutting polymers and natural fiber composites to practical use 将激光切割聚合物和天然纤维复合材料的多相材料平衡原理推向实际应用
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.503175
A. Ostendorf, M. Goede, S. Barcikowski
{"title":"Putting fundamentals on multiphase material balance of laser based cutting polymers and natural fiber composites to practical use","authors":"A. Ostendorf, M. Goede, S. Barcikowski","doi":"10.1117/12.503175","DOIUrl":"https://doi.org/10.1117/12.503175","url":null,"abstract":"Laser-based cutting and drilling of polymers and natural fiber composites has already covered a market niche, even though fundamentals of heat transfer and multiphase material balances are not well characterized up to now. Discussing the decomposition and vaporization balance, a recommendation on process parameters is given. Within this paper, criteria for laser-based production are given as well as requirements of the material. The investigation focus on strategies to control the pyrolysation and decomposition of the material as well as the prognosis of the process ability derived from laser Micropyrolysis-GC/MS correlated with industrial applications.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"101 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":"114019424","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
Thick sandwich panel fabrication for bridge deck structure and its joint strength 桥面结构厚夹层板的制作及其接缝强度
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497718
A. Kitagawa, Naoaki Fukuda, Shinnosuke Takeda, A. Matsunawa
{"title":"Thick sandwich panel fabrication for bridge deck structure and its joint strength","authors":"A. Kitagawa, Naoaki Fukuda, Shinnosuke Takeda, A. Matsunawa","doi":"10.1117/12.497718","DOIUrl":"https://doi.org/10.1117/12.497718","url":null,"abstract":"The purpose of this study is to evaluate the static strength of thick plate laser welded lap joint and the performance of thick sandwich panel for bridge deck structure. The strength of thin sheet laser welded lap joint whose thickness is less than 1.6 mm have been already reported, but the strength of thick plate laser welded lap joint whose thickness is more than 10 mm is not known. The authors believe this thick laser welded lap jont enable heavy industries to make a revolution on applying it for sandwich panel fabrication. Then, they have conducted mechanical tests of 10 mm + 6 mm thick laser welded lap joints to grasp their static strength. According to the obtained data, they fabricate a thick sandwich panel model of newly designed bridge deck structure for evaluation. The static lading test, cyclic loading test and collapsing test show that the thick sandwich panel has enough performance for the practical application.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"11 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":"127733291","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
Modematic: a fast laser beam analyzing system for high power CO2-laser beams 调制解调器:用于高功率co2激光束的快速激光束分析系统
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497931
F. Olsen, D. Ulrich
{"title":"Modematic: a fast laser beam analyzing system for high power CO2-laser beams","authors":"F. Olsen, D. Ulrich","doi":"10.1117/12.497931","DOIUrl":"https://doi.org/10.1117/12.497931","url":null,"abstract":"The performance of an industrial laser is very much depending upon the characteristics of the laser beam. The ISO standards 11146 and 11154 describing test methods for laser beam parameters have been approved. To implement these methods in industry is difficult and especially for the infrared laser sources, such as the CO2-laser, the availabl analyzing systems are slow, difficult to apply and having limited reliability due to the nature of the detection methods. In an EUREKA-project the goal was defined to develop a laser beam analyzing system dedicated to high power CO2-lasers, which could fulfill the demands for an entire analyzing system, automating the time consuming pre-alignment and beam conditioning work required before a beam mode analyses, automating the analyzing sequences and data analysis required to determine the laser beam caustics and last but not least to deliver reliable close to real time data to the operator. The results of this project work will be described in this paper. The research project has led to the development of the Modematic laser beam analyzer, which is ready for the market.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"55 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":"115923251","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
High power laser applications in Nippon Steel Corporation 高功率激光在新日铁的应用
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497732
K. Minamida
{"title":"High power laser applications in Nippon Steel Corporation","authors":"K. Minamida","doi":"10.1117/12.497732","DOIUrl":"https://doi.org/10.1117/12.497732","url":null,"abstract":"The full-scale use of lasers in the steel industry began 25 years ago with their applications as controllable light sources. The laser systems contribute to increase efficiency and quality of the steel making processes, and also save energy of resources and labor. Laser applications in the steel making process generally require high input energy, however, it is essential to consider the interaction between the laser beam and materials. In particular, the reflectivity of the laser beam on the surface of material and the quantity of the laser-induced plasma are critical parameters for high efficient processes. We newly developed methods and systems of high power 45 kW CO2 laser welding of hot steel specimens with their applications as welding characteristics of hot steel specimens that temperature is about 1000 degree C, have been examined. Using laser induced plasma as a secondary heat source, the penetration depth improves about 30% compared to that at room temperature. The bead width is also enlarged by 10%. The maximum depth is 38 mm at 1m/min welding velocity at 40 kW. A beam weaving method is adopted for further enlargement of bead width without degrading fusion efficiency. It is also effective for suppressing the bead depth deviation. Additionally, several new applications, for example, new type all-laser-welded honeycomb panels for high- speed civil transport, will be talked.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"316 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":"122128296","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
Present state of applying diode laser in Toyota Motor Corp. 半导体激光器在丰田汽车公司的应用现状。
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.486492
Masaki Terada, Hideo Nakamura
{"title":"Present state of applying diode laser in Toyota Motor Corp.","authors":"Masaki Terada, Hideo Nakamura","doi":"10.1117/12.486492","DOIUrl":"https://doi.org/10.1117/12.486492","url":null,"abstract":"Since the mid-1980s, Toyota Motor Corporation has applied CO2 lasers and YAG lasers to machine (welding, piercing, cutting, surface modifying etc.) automobile parts. In recent years diode lasers, which are excellent in terms of cost performance, are now available on the market as a new type of oscillator and are expected to bring about a new age in laser technology. Two current problems with these lasers, however, are the lack of sufficient output and the difficulty in improving the focusing the beam, which is why it has not been easy to apply them to the machining of metal parts in the past. On the other hand, plastics can be joined with low energy because they have a lower melting point than metal and the rate of absorption of the laser is easy to control. Moreover, because the high degree of freedom in molding plastic parts results in many complex shapes that need to be welded, Toyota is looking into the use of diode lasers to weld plastic parts. This article will introduce the problems of plastics welding and the methods to solve them referring to actual examples.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"90 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":"114974895","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
Application of YAG laser welding to gas turbine components YAG激光焊接在燃气轮机部件上的应用
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.503147
Shuho Tsubota, M. Mega, Koji Takahashi, Yoshitaka Uemura, Norihide Hirota, Kengou Yamaguchi
{"title":"Application of YAG laser welding to gas turbine components","authors":"Shuho Tsubota, M. Mega, Koji Takahashi, Yoshitaka Uemura, Norihide Hirota, Kengou Yamaguchi","doi":"10.1117/12.503147","DOIUrl":"https://doi.org/10.1117/12.503147","url":null,"abstract":"An investigation to apply YAG laser welding to gas turbine components was carried out. The materials of gas turbine such as Ni base alloy are difficult to weld by conventional arc welding methods because of large heat affection. But laser welding can reduce heat input compared with conventional methods and keeps the good repeatability. The welding parameter survey was carried out to satisfy the designing requirements. The YAG laser welding under appropriate conditions enables to prevent welding defects such as HAZ cracks and improves the weld joints quality and performance. Tensile test and low cycle fatigue test were carried out. Tensile strength and fatigue life of laser weld joints are same or higher than that of conventional manual TIG weld joints. The Automatic YAG laser welding system was also developed and put into practical use.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"59 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":"122051208","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
Thick plate welding with Nd:YAG laser and COIL 用Nd:YAG激光和COIL焊接厚板
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497725
T. Nakabayashi, F. Wani, A. Hayakawa, Sachio Suzuki, K. Yasuda
{"title":"Thick plate welding with Nd:YAG laser and COIL","authors":"T. Nakabayashi, F. Wani, A. Hayakawa, Sachio Suzuki, K. Yasuda","doi":"10.1117/12.497725","DOIUrl":"https://doi.org/10.1117/12.497725","url":null,"abstract":"In the field of heavy industries, many products are made of thick metal parts. Nd:YAG laser has been recently developed up to 10 kW. Nd:YAG laser has the characteristics of the optical fiber transmittance and the good absorption by the metal surface, so that it is expected to apply Nd:YAG laser to thick plate welding. This study presents the thick plate welding with Nd:YAG laser and COIL (Chemical Oxygen-Iodine Laser). We have developed a coaxial beam combining system with beams of Nd:YAG laser and COIL. The maximum average power of the combined beam was 19 kW. Welding tests of 304 stainless steel plates were carried out. The effects of various welding parameters were investigated, such as the laser power and pulse modulation. As a result, it was clarified that the pulse wave has good efficiency of deeper penetration as compared to continuous wave at low welding speed. When the combined beam was used, 20 mm penetration depth on the stainless steel could be obtained in high aspect ratio at welding speed of 1m/min. When the combined beams and another Nd:YAG laser beam whose power was 4 kW were used, both side welding on 30 mm thickness plate could be achieved.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"5 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":"121138717","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: 3
Assessment of hot crack properties of laser welded stainless steel alloys 激光焊接不锈钢合金热裂纹性能评价
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497904
T. W. Juhl, F. Olsen
{"title":"Assessment of hot crack properties of laser welded stainless steel alloys","authors":"T. W. Juhl, F. Olsen","doi":"10.1117/12.497904","DOIUrl":"https://doi.org/10.1117/12.497904","url":null,"abstract":"Crack testing concerning small and fast solidifying laser welds in austenitic stainless steel has been studied. A set of methods has been applied to investigate alloy properties, including (1) Application of known information to predict solidification phases, (2) Weld metal solidification rate measurements for prediction of phases, (3) Various crack tests to assess the crack susceptibility of alloys and (4) A combination of the above for selection of suitable, weldable alloys. The possibility of using such specific methods for alloys and applications has been investigated and recommendations are given. Results from the solidification rate measurements had high variations. They do not show an expected correlation between the crack resistance and the solidification rate. The employment of pulsed seam welds is assessed not to be usable in the present measurement method. From evaluation of several crack tests, the Weeter spot weld test has been chosen to form a basis for the development of a practicable method to select specific alloys for welding applications. A new test, the Groove weld test was developed, which has reduced the time consumption and lightened the analysis effort considerably. The Groove test showed results in good compliance with the Weeter test.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"90 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":"126248920","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
Newly undertaken inspections for aged nuclear power plants 新开展的老旧核电站检查工作
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497921
T. Matsui, Atsushi Baba, Y. Yamashita
{"title":"Newly undertaken inspections for aged nuclear power plants","authors":"T. Matsui, Atsushi Baba, Y. Yamashita","doi":"10.1117/12.497921","DOIUrl":"https://doi.org/10.1117/12.497921","url":null,"abstract":"Some of Japan's oldest nuclear generation plants are now entering their 30th year, which is close to their designed lifespan. The rules on fitness-for-service for nuclear power plants undertaken by utilities are to extend the lifetime of plants to 60 years. Upon lifetime extension new rules must be applied and JSME (Japan Society of Mechanical Engineers) issued new rules in May 2000. These rules define allowable flaw sizes in operating plant components. In these circumstances, in-situ flaw sizing and repairs are urgently needed. Accordingly, laser inspections such as laser UT and laser holography are being developed.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"36 4 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":"132729345","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
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