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International Congress on Laser Advanced Materials Processing最新文献

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Lowest cost due to highest productivity and highest quality 由于最高的生产率和最高的质量，成本最低
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.486501
D. Wenk
{"title":"Lowest cost due to highest productivity and highest quality","authors":"D. Wenk","doi":"10.1117/12.486501","DOIUrl":"https://doi.org/10.1117/12.486501","url":null,"abstract":"Since global purchasing in the automotive industry has been taken up all around the world there is one main key factor that makes a TB-supplier today successful: Producing highest quality at lowest cost. The fact that Tailored Blanks, which today may reach up to 1/3 of a car body weight, are purchased on the free market but from different steel suppliers, especially in Europe and NAFTA, the philosophy on OEM side has been changing gradually towards tough evaluation criteria. \"No risk at the stamping side\" calls for top quality Tailored- or Tubular Blank products. Outsourcing Tailored Blanks has been starting in Japan but up to now without any quality request from the OEM side like ISO 13919-1B (welding quality standard in Europe and USA). Increased competition will automatically push the quality level and the ongoing approach to combine high strength steel with Tailored- and Tubular Blanks will ask for even more reliable system concepts which enables to weld narrow seams at highest speed. Beside producing quality, which is the key to reduce one of the most important cost driver \"material scrap,\" in-line quality systems with true and reliable evaluation is going to be a \"must\" on all weld systems. Traceability of all process related data submitted to interfaces according to customer request in combination with ghost-shift-operation of TB systems are tomorrow's state-of-the-art solutions of Tailored Blank-facilities.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"27 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":"133568394","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 in high power laser welding 高功率激光焊接中的锁孔行为
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497891
S. Tsukamoto, I. Kawaguchi, G. Arakane, H. Honda
{"title":"Keyhole behavior in high power laser welding","authors":"S. Tsukamoto, I. Kawaguchi, G. Arakane, H. Honda","doi":"10.1117/12.497891","DOIUrl":"https://doi.org/10.1117/12.497891","url":null,"abstract":"Dynamic keyhole behavior has been observed to elucidate the formation and suppression mechanism of the porosity in 20 kW CO2 laser welding with the depth of 20 mm. The results indicate that the bubble is formed by capillary instability of the cylindrical keyhole. The tip of the keyhole is broken up by instability during rapid decrease in the depth, so called spiking phenomenon. Spontaneous fluctuation in the keyhole depth and spontaneous keyhole perturbation during welding promotes the bubble formation. Pulse modulation of the laser power is effective in stabilizing the keyhole and hereby suppressing the porosity if the frequency coincides with the eigenfrequency of the molten pool oscillation. The suppression effect is enhanced if the waveform is controlled appropriately.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"1 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":"128536939","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: 30
Deep penetration laser welding with Nd:YAG lasers combination up to 11 kW laser power 深熔激光焊接采用Nd:YAG激光器组合，激光功率可达11kw
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.486494
F. Coste, F. Janin, M. Hamadou, R. Fabbro
{"title":"Deep penetration laser welding with Nd:YAG lasers combination up to 11 kW laser power","authors":"F. Coste, F. Janin, M. Hamadou, R. Fabbro","doi":"10.1117/12.486494","DOIUrl":"https://doi.org/10.1117/12.486494","url":null,"abstract":"The use of a combination of 2 or 3 Nd:YAG lasers having each an output power of 3 or 4 kW is presented in the case of heavy section welding. We discuss the main difficulties that are occurring for these conditions. The strategy leading to the welding of sample thickness up to 60 mm is presented.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"259 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":"132735569","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: 8
Innovative high power lasers for welding applications 用于焊接应用的创新型高功率激光器
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.486502
H. Huegel
{"title":"Innovative high power lasers for welding applications","authors":"H. Huegel","doi":"10.1117/12.486502","DOIUrl":"https://doi.org/10.1117/12.486502","url":null,"abstract":"From process considerations and economical reasons, an ideal welding laser should provide the necessary power at short wavelength and the highest possible beam quality at a high overall efficiency. The concept of a diode-pumped Yb:YAG thin disc laser, in principle, fulfills these requirements at the same time. Its characteristic features are discussed and results of fundamental theoretical and experimental investigations are presented. Performance data of first industrial devices underline the advantages that can be expected from this design: a power of 1.5 kW is delivered through a 0.15 mm fiber at an optical-to-electrical efficiency of 27%. Some preliminary results of welding studies with up to four of such devices demonstrate its great potential for thin metal sheet welding and many other applications where the achievement of well-defined slender weld seams is essential.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"179 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":"133151990","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
Nd:YAG laser welding of aluminum alloy assisted by high-peak pulsed lasers 高频脉冲激光辅助下铝合金Nd:YAG激光焊接
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497779
T. Ooie, A. Utsumi, T. Yano
{"title":"Nd:YAG laser welding of aluminum alloy assisted by high-peak pulsed lasers","authors":"T. Ooie, A. Utsumi, T. Yano","doi":"10.1117/12.497779","DOIUrl":"https://doi.org/10.1117/12.497779","url":null,"abstract":"Nd:YAG laser welding of an aluminum alloy assisted by high-peak pulsed lasers such as excimer and Q-switched Nd:YAG laseers was investigated. In this novel laser hybrid welding, a plasma induced by a high-peak power laser absorbs the Nd:YAG laser energy and transmits it to a work piece. In the laser welding of the aluminum alloy using the Nd:YAG laser of which maximu power was 6 kW, the heat input and the penetration depth increased by 20% and 8%, respectively, by using simultaneous irradiation of the excimer laser of which average power was only 16 W. According to the optical emission of the plasmas, not only KrF excimer laser but also 2nd harmonic of a Q-switched Nd:YAG laser is applicable for the laser hybrid welding as the high-peak pulsed laser.","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":"125195955","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
Current cutting technology of high power CO2 laser 当前高功率CO2激光切割技术
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497717
Y. Miyamoto, T. Hirosaki, T. Murai
{"title":"Current cutting technology of high power CO2 laser","authors":"Y. Miyamoto, T. Hirosaki, T. Murai","doi":"10.1117/12.497717","DOIUrl":"https://doi.org/10.1117/12.497717","url":null,"abstract":"Laser processing using the high-density energy beam concentrated on a very small area spot size has been advanced in the industrial fields of cutting and welding. Also of it, cutting with small heat-affect and narrow kerf width has become possible for high power CO2 lasers. In recent years laser processing machines have replaced the conventional means of production in the sheet metal industry. With this has come a greater expectation for the laser processing machine to process the parts of large-item small-volume production with greater precision and better efficiency. Moreover, laser cutting, due to its greater precision and higher stability, is spreading to other fields such as the machine used for the construction of thick-plated equipment. This field has traditionally used gas cutting and plasma cutting in its manufacturing process. This paper will describe the current cutting technology of high power CO2 laser. It will explain the relationship between the laser beam's characteristics and its quality performance of cutting. It will then go on to outline the current laser processing machines in which technology has been applied.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"414 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":"124809745","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
New developments in surface technology and prototyping 表面技术和原型的新发展
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497613
T. Himmer, E. Beyer
{"title":"New developments in surface technology and prototyping","authors":"T. Himmer, E. Beyer","doi":"10.1117/12.497613","DOIUrl":"https://doi.org/10.1117/12.497613","url":null,"abstract":"Novel lightweight applications in the automotive and aircraft industries require advanced materials and techniques for surface protection as well as direct and rapid manufacturing of the related components and tools. The manufacturing processes presented in this paper are based on multiple additive and subtractive technologies such as laser cutting, laser welding, direct laser metal deposition, laser/plasma hybrid spraying technique or CNC milling. The process chain is similar to layer-based Rapid Prototyping Techniques. In the first step, the 3D CAD geometry is sliced into layers by a specially developed software. These slices are cut by high speed laser cutting and then joined together. In this way laminated tools or parts are built. To improve surface quality and to increase wear resistance a CNC machining center is used. The system consists of a CNC milling machine, in which a 3 kW Nd:YAG laser, a coaxial powder nozzle and a digitizing system are integrated. Using a new laser/plasma hybrid spraying technique, coatings can be deposited onto parts for surface protection. The layers show a low porosity and high adhesion strength, the thickness is up to 0.3 mm, and the lower effort for preliminary surface preparation reduces time and costs of the whole process.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"146 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":"122613859","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
Weldability of mild steel with oxide film in high power CO2 laser welding 低碳钢氧化膜在高功率CO2激光焊接中的可焊性
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497728
K. Ono, K. Adachi, I. Miyamoto
{"title":"Weldability of mild steel with oxide film in high power CO2 laser welding","authors":"K. Ono, K. Adachi, I. Miyamoto","doi":"10.1117/12.497728","DOIUrl":"https://doi.org/10.1117/12.497728","url":null,"abstract":"Influence of oxide film, such as laser cutting edge or mill-scale, on solidification crack formation in high power CO2 laser of mild steel was investigated. Laser welding test of butt joints were performed. Examinations were made on the solidification crack formation. The results of these experiments lead to understanding that (1) excess oxygen supplied from oxide film causes solidification crack as well as porosity and (2) influence of oxygen content is bigger than that of sulfur when there is excess oxygen in the weld. It is considered that these are attributed to change of molten metal flow and drop of melting point such as sulfur. These results suggest that reduction of oxide film thickness or killing oxygen activity by supplementary deoxidizing elements may produce acceptable weld.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"1 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":"131595232","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
Joining of dissimilar materials 不同材料的连接
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497587
G. Sepold, M. Kreimeyer
{"title":"Joining of dissimilar materials","authors":"G. Sepold, M. Kreimeyer","doi":"10.1117/12.497587","DOIUrl":"https://doi.org/10.1117/12.497587","url":null,"abstract":"The combination of dissimilar materials is a challenging goal for the development of parts with locally optimized properties. The main goal of these developments are weight reduction, optimization of properties or the tailoring of the properties for specific applications in combination with an efficient joining technology. However, using conventional high temperature joining technologies, the formation of intermetallic phases within the joining zone is a nearly unavoidable phenomenon when joining dissimilar material combinations. These phases cause a lack of the mechanical stability in the joining zone. By using an optimized laser joining technology for thin sheet materials this problem could be overcome. The localized energy input of the laser beam and a controlled heat distribution leads to minimized interaction of the joint materials. To overcome process instabilities a special working head technic was developed. At present, Fe-Al and Ti-Al material combinations are successfully joined by this process. Metallurgical and mechanical properties of a number of selected dissimilar material joints will be presented and applications discussed.","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":"130916816","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: 13
Characteristic of ZnSe aspheric beam homogenizer for CO2 laser 二氧化碳激光器用ZnSe非球面光束均质器特性研究
International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497929
T. Hirai, K. Fuse, M. Shiozaki, K. Ebata, T. Okada, H. Namba
{"title":"Characteristic of ZnSe aspheric beam homogenizer for CO2 laser","authors":"T. Hirai, K. Fuse, M. Shiozaki, K. Ebata, T. Okada, H. Namba","doi":"10.1117/12.497929","DOIUrl":"https://doi.org/10.1117/12.497929","url":null,"abstract":"Laser processing is now being used increasingly in the area of electronics, especially, for drilling micro holes in printed circuit. But the intensity distribution of laser beam mainly based on Gaussian is not uniform. Therefore, the demand for uniform intensity distribution is rising rapidly in the field of heat processing. To obtain higher uniformity, attempts must be made to convert non-uniform Gaussian distribution into top-hat shaped uniform intensity distribution for smoothly bending laser beams. In this study the authors propose an aspheric beam homogenizer made from ZnSe that can convert non-uniform Gaussian distribution into top-hat shaped uniform intensity distribution. The ZnSe beam homogenizer consists of two aspheric lenses. First one converts Gaussian profile to uniform irradiation, and second one performs phase matching. The authors design this optical component with a special method based on wave optics. In the design, the authors define the target intensity distribution as the super-Gaussian shaped one instead of completely uniform top-hat shaped one. Compared with the homogenizers of traditional design, the newly designed homogenizer achieved 70% increase in the uniformity of signal intensity even after propagation. The paper reports the measured intensity distribution after propagation from the beam homogenizer with high power CO2 laser.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"63 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":"128377430","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
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