International Congress on Laser Advanced Materials Processing最新文献_第8页

Direct diode laser cladding of Co based alloy to dual phase stainless steel for repairing the machinery parts 钴基合金与双相不锈钢直接激光熔覆修复机械零件

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497957

K. Yamada, Sou Morisita, M. Kutsuna, Takeshi Ikeda

引用次数: 6

Flexible laser welding of tailored blanks in small batch series 小批量系列定制毛坯柔性激光焊接

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.486495

C. Bagger, F. Olsen

{"title":"Flexible laser welding of tailored blanks in small batch series","authors":"C. Bagger, F. Olsen","doi":"10.1117/12.486495","DOIUrl":"https://doi.org/10.1117/12.486495","url":null,"abstract":"In a EU Craft project including eight partners in five countries, the most important aspects regarding efficient and low cost manufacture by small and medium sized enterprises (SME) of tailored blanks has been systematically investigated. In this paper, small batch series laser welding of tailored blanks in SME will be described. This includes the design, development and systematic use of a flexible and low cost clamping device as well as the practical experience obtained on the job shop through systematic optimization of welding of tailored blanks with even and uneven thickness (0.75 and 1.25 mm). A clamping device that is able to hold finished parts up to 1 x 1 m is successfully manufactured and tested. A special arrangement with alignment needles along the weld line is used to precisely position the sheets. These needles are turned into the clamping device during welding, where root shielding is employed. Hydraulic presses hold down the sheets, so they move less than 0.01 mm during welding. High quality tailored blank welds are successfully manufactured in ten different combinations, including mild steel and medium strength steel with even and uneven thickness with and without zinc coating.","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":"122548749","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

Folded resonator for reactor-pumped 3He/Ar/Xe systems 反应堆泵浦3He/Ar/Xe系统的折叠谐振器

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497937

W. Shen, Zhaogu Cheng, J. Wan, Huijie Huang

引用次数: 0

Mechanism of pore formation during keyhole laser spot welding 小孔激光点焊孔形成机理研究

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497914

A. Kaplan, M. Mizutani, S. Katayama, A. Matsunawa

{"title":"Mechanism of pore formation during keyhole laser spot welding","authors":"A. Kaplan, M. Mizutani, S. Katayama, A. Matsunawa","doi":"10.1117/12.497914","DOIUrl":"https://doi.org/10.1117/12.497914","url":null,"abstract":"Theoretical and experimental studies have been carried out in order to improve the understanding of the mechanism of pore formation in keyhole laser spot welding in a qualitative and also quantitative manner. A semi-analytical mathematical model of the keyhole collapse illustrates the different characteristic time scales of the contributing physical processes: post-vaporization (order of magnitude: 100 ns typically), excess keyhole vapor relaxation flow 10 μs), inertia driven collapse (100 μs), followed by bubble contraction, re-condensation and rising (10 ms), and re-solidification (10 ms). The conditions of the keyhole just before switching off the laser beam, observed by X-ray imaging, are essential for the subsequent collapse mechanism. In case of a bottleneck-shaped keyhole, which can easily form due to the paradox of vapor flow inversion, bubble formation is likely to occur due to necking. When the thermally contracting bubble is trapped by the re-solidification front, a pore is formed. The model is complementary to high speed X-ray observations of the keyhole shape, particularly in liquid Zn that enables investigation of keyhole and bubble formation not constrained by surrounding solid.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"188 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":"117304466","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

End-pumped thin-rod Yb:YAG amplifier for laser processing 激光加工用端泵薄杆Yb:YAG放大器

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497932

S. Takasaki, Y. Tsujioka, M. Fukuda, Shinichi Matsubara, S. Kawato, Takao Kobayashi

{"title":"End-pumped thin-rod Yb:YAG amplifier for laser processing","authors":"S. Takasaki, Y. Tsujioka, M. Fukuda, Shinichi Matsubara, S. Kawato, Takao Kobayashi","doi":"10.1117/12.497932","DOIUrl":"https://doi.org/10.1117/12.497932","url":null,"abstract":"The Yb (ytterbium) laser material is promising for high-power all-solid-state ultrashort pulse lasers because of its high quantum efficiency and wide gain spectrum. A didoe end-pumped technology is developed for high-average-power and efficient all-solid state ultrashort pulse lasers with high beam quality output. Two 100 W CW-LDs are used for pumping and the beams are focused on the end surfaces of a thin and long Yb:YAG rod. A pair of parallel side surfaces of the rod is placed in contact with cupper heat sinks to remove heat. A one-dimensional distribution of thermal stress induced birefringence was observed in the rod by this simple heat flow. The loss due to thermal birefringence was measured to be smaller than 3%, when the probe beam was linearly polarized in parallel or perpendicular to the direction of cooling. It can be expected theoretically that a moderate single-path gain of 4 for efficient amplification and the optical conversion efficiency of 50% are realized for multimode operation with a pump power of 200 W. In the experiment, output power was measured to be 55 W with beam quality factor of Mx2 x My2 = 5.5 x 6.0 and 27 W with Mx2 x My2 = 1.3 x 1.4 for simple plane-plane linear cavity configuration with no thermal lens compensations.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"103 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":"116803901","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

Hybrid welding of hollow section beams for a telescopic lifter 伸缩式升降机空心截面梁的混合焊接

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497770

Petteri Jernstroem

{"title":"Hybrid welding of hollow section beams for a telescopic lifter","authors":"Petteri Jernstroem","doi":"10.1117/12.497770","DOIUrl":"https://doi.org/10.1117/12.497770","url":null,"abstract":"Modern lifting equipment is normally constructed using hollow section beams in a telescopic arrangement. Telescopic lifters are used in a variety number of applications including e.g. construction and building maintenance. Also rescue sector is one large application field. It is very important in such applications to use a lightweight and stable beam construction, which gives a high degree of flexibility in working high and width. To ensure a high weld quality of hollow section beams, high efficiency and minimal distortion, a welding process with a high power density is needed. The alternatives, in practice, which fulfill these requirements, are laser welding and hybrid welding. In this paper, the use of hybrid welding process (combination of CO2 laser welding and GMAW) in welding of hollow section beam structure is presented. Compared to laser welding, hybrid welding allows wider joint tolerances, which enables joints to be prepared and fit-up less accurately, aving time and manufacturing costs. A prerequisite for quality and effective use of hybrid welding is, however, a complete understanding of the process and its capabilities, which must be taken into account during both product design and manufacture.","PeriodicalId":159280,"journal":{"name":"International Congress on Laser Advanced Materials Processing","volume":"47 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":"117035099","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

Fan shaped cracking test of aluminum alloys in laser welding 铝合金激光焊接扇形开裂试验

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497901

M. Kutsuna, Keiichiro Shido, T. Okada

引用次数: 6

Application of laser welding for body in white 激光焊接在白色车身中的应用

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497742

K. Mori, S. Takemura, Takuma K. M. Nakamura, Youichi Yamamoto

引用次数: 5

Development of high speed laser soldering process for lead-free solder with diode-laser 二极管激光无铅焊料高速激光焊接工艺的开发

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497966

Jing-bo Wang, M. Watanabe, Y. Goto, K. Fujii, Hiroyuki Kuriaki, M. Satoh, J. Ikeda, K. Fujimoto

引用次数: 1

Laser beam welding of high stressed, complex aircraft structural parts 高应力、复杂飞机结构件的激光焊接

International Congress on Laser Advanced Materials Processing Pub Date : 2003-03-03 DOI: 10.1117/12.497719

Peter Mueller-Hummel, Stefan Ferstl, Marcus Sengotta, R. Lang

引用次数: 14