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14th NOLAMP Conference : The 14th Nordic Laser Materials Processing Conference, August 26th – 28th 2013, Gothenburg, Sweden
- 2013
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Laser is a key element in obtaining a sustainable economy in Europe. Innovative laser processes will play a significant role in future green manufacturing as they provide a precise, well-controlled and highly effective energy deposition to the workpiece. Future challenges are to increase the spectrum of laser manufacturing technologies in all sectors where the laser can offer innovative product solutions, higher product quality, less environmental impact, higher productivity and in turn cost benefits.The NOLAMP conferences address all aspects of laser materials processing from fundamental science to industrial applications. The first NOLAMP conference took place in Oslo in 1987 in a period of intense development of the laser processes and their industrial applications. The NOLAMP has continued on a biannual cycle ever since, strengthening the Nordic laser community by encouraging knowledge transfer and networking. Now, 26 years later, in the forthcoming 14th NOLAMP, the research and development of processes like laser welding, laser hybrid welding, laser cutting and laser surface treatment is still very important, as well as the development of industrial applications and equipment for laser material processing. This time the NOLAMP Conference will be held in Gothenburg, Sweden. In this highly industrialized region of Sweden and with the close distance to Denmark, Norway and Finland, we hope to attract a strong participation from industry and the scientific community. On behalf of the Nordic laser community and Luleå University of Technology, it is our great pleasure to invite you to the 14th NOLAMP conference.
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| 2. |
- Engström, Hans, et al.
(författare)
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Adaptive process control in laser robotic welding
- 2003
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Ingår i: 9th NOLAMP Conference. - Trondheim : Department of Geography, Norwegian University of Science and Technology. - 8292499016 ; , s. 251-258
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Konferensbidrag (refereegranskat)abstract
- An adaptive process control and seam tracking system for robotic laser welding with filler was developed and then evaluated for the butt welding of SS-1147 mild steel sheets of thickness 2 mm. The system comprises a 3 kW Nd:YAG laser, an industrial robot and a laser camera for seam tracking and measurement of gap width. The gap width data are used to control welding speed and wire feed rate. Experiments were carried out to weld butt joints of SS-1147 mild steel with gap widths varying between 0-0.8 mm. The resultant weld geometry was evaluated to determine the operating range of the laser camera (measured gap width) for monitoring to result in acceptable welds.
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| 4. |
- Engström, Hans, et al.
(författare)
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Education of Industrial Users of Laser Materials Processing Technology
- 2005
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Ingår i: 10th NOLAMP Conference. - Luleå : Luleå tekniska universitet. - 9163172283 ; , s. 33-40
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Konferensbidrag (refereegranskat)abstract
- The extensive use of high power laser for materials processing in industry has brought a new era in manufacturing technology. High speed processing with low heat input and high precision offers up-to-date manufacturing. New processes like laser hybrid welding are developed and introduced in industry. But the potential of laser technology is not by far fully utilised due to lack of knowledge of laser processes in the industrial environment.The national Swedish programme, "proDesign - Expert competence in industrial product development and materials processing", offers new opportunities of providing education for industrial managers, designers and manufacturing people. Within the scope of proDesign, Luleå University of Technology has developed several new courses in laser material processing for people in industry. These courses have now uccessfully been introduced to the Swedish market and this paper presents experiences from this work.
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| 5. |
- Engström, Hans, et al.
(författare)
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New laser projects to strengthen the manufacturing industry in northern Scandinavia
- 2011
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Ingår i: 13th NOLAMP Conference. - : Department of Geography, Norwegian University of Science and Technology.
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Konferensbidrag (refereegranskat)abstract
- The industrial development in northern part of Scandinavia has for the last years steadily beengrowing, primarily driven by strong expansion in mining, hydro power and wind powerindustries, which influences the growth and also demand on the mechanical industry in thearea. In order to further develop the competitiveness of manufacturing companies and thepromotion of laser technology in the north of Sweden and Finland, three new laser projectswere approved. These projects will be presented in this paper.. One project at LuleåUniversity of Technology (LTU) will support industry to develop and implement lasers inmanufacturing, combined with further development of an interesting laser process useful forthe regional industry. One project is a cooperation project between LTU and University ofOulu that will focus on developing optimal laser welds in high strength steels using highpower fibre- and disc lasers and evaluation of fatigue properties of the welds. The thirdproject deals with fatigue properties of laser clad surfaces and is a cooperation projectbetween LTU and Centria Research unit of Central Osterbothnia of Applies Sciences,involving also Tampere University of Technology.
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| 6. |
- Håkansson, Anders, et al.
(författare)
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Barriers to Implementation of Laser Welding Technology – A Study of 11 Companies in Scandinavia
- 2015
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Ingår i: Manufacturing Science and Technology. - : Horizon Research Publishing Co., Ltd.. - 2333-2735 .- 2333-2697. ; 3:2, s. 48-55
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Tidskriftsartikel (refereegranskat)abstract
- In the manufacturing industry, one essential contribution to sustain high competitiveness is successful regular implementation of advanced manufacturing technology. Barriers of different sorts could interfere with this implementation. The purpose of this study is to investigate whether there are barriers to implementation of laser welding technology and how they affect the implementation process. Eleven small manufacturing companies, mainly in northern Sweden and Finland, are interviewed regarding their experiences with implementation of laser welding technology. What is clear is that this is a more complex question than just lack of money. The study shows other underlying barriers to have more influence on the lack of implementation. Many of the barriers are connected with organization and management. Identifying these barriers and when they occur in the implementation process may improve implementation efficiency.
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| 7. |
- Kaplan, Alexander, et al.
(författare)
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Projekt: Forum för Industriell Framtid
- 2013
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Annan publikation (populärvet., debatt m.m.)abstract
- För att uppnå det övergripande målet att skapa en internationellt konkurrenskraftig regional tillverkningsindustri har projektet följande mål: • Genomföra ett antal högkvalitativa seminarier där experter möter små eller medelstora svenska och finska företag. Seminarierna ska resultera i en ”Agenda för industriell framtid” • Implementera ett antal demonstranter (svetsning) där man kan utveckla och träna operatörer, utveckla nya organisationsformer, testa olika styrsystem, samordna demonstratorer i nätverk och ett antal andra aktiviteter som utvecklats inom ”Agenda för industriell framtid” • Genomföra 20 handlingsprogram (ett för varje företag) där man försöker realisera agendan i anslutning till den etablerade demonstratorn. Målsättningen är att förbättra det ekonomiska omsättningen med 15 % samtidigt som man förbättrar miljön med 15 %. • Arrangera ett internationellt slutseminarium Projektets vision är att regionens tillverkningsindustri kan ses som en av de mest avancerade SME-kulturerna i världen. Baserat på avancerad hög-teknologi lyckas man utveckla innovativa produkter i världsklass, samtidigt som man värnar om ekologisk hållbarhet. Metoder för jämställdhet, som bidrar till att bryta den sneda könsfördelningen inom industrin, har utvecklats. Företagen är konkurrenskraftiga och genererar såväl höga intäkter som en stabilt växande arbetsmarknad.
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| 8. |
- Nilsson, Klas, et al.
(författare)
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Influence of butt and T-joint preparation in laser arc hybrid welding
- 2002
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Konferensbidrag (refereegranskat)abstract
- Using a hybrid CO2 laser/MAG welding process, the weldability of butt and T joints (fillet welds) in mild steel (0.056%C, 0.61%Mn) plate of 8 mm thickness, as received from laser or mechanical cutting, was investigated. A 6 or 17 kW laser was used in conjunction with a conventional MIG/MAG welding gun and a mixture of helium and argon with carbon dioxide or oxygen as the shielding gas. Ranges of welding speeds, wire feed rates, stick out, welding current and voltages, arc to laser beam distances, and shielding gas compositions were used. The welds were assessed by appearance and shape, and by measurements of tensile, impact and bending properties
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| 9. |
- Nilsson, Klas, et al.
(författare)
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Parameter Influence in CO2-laser/MIG Hybrid Welding
- 2003
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Ingår i: 56th Annual assembly of International Institute of Welding.
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Konferensbidrag (refereegranskat)abstract
- Hybrid welding, as the combination of laser beam and arc welding, is an innovative joining technology that has many advantages compared to the single processes. With the hybrid process joint gap can overbridges and hence additional and costly joint preparation can be avoided. Also the weld metal composition can be controlled by the filler wire. The laser/MIG hybrid welding pårocess is up to 50 % faster compare to autogenous laser welding. This paper presents results from an ongoing investigation into laser/MIG hybrid welding of 6 mm thick, high strength steels.The results include welding parameters for a 6 kW CO2-laser combined with conventional pulsed MIG/MAG equipment. The influences of the basic MIG parameters as the voltage, pulsing time and pulsing frequency on the welding result were investigated, where especially the geometry of the weld seams as well as undercut formation is considered. The influence of the welding result by adjusting the lateral position of laser beam and MIG arc was also examined as well as suitable parameter setup for different joint configurations like V- and butt joints. In the case of butt joint, the maximum bridgeable gap width was determined.It was found that the MIG power has a major influence at the weld geometry. A high MIG power leads to increased undercut size and increased porosity. The variation of the lateral displacement of the MIG arc was shown to be tolerant. It can be stated that a variation of the lateral displacement of 1.5 mm gave still acceptable welding results. It was possible to weld butt joints with a gap of up to 2.0 mm and a maximum in welding speed was reached with a gap of 1.0 mm.
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| 10. |
- Norman, Peter, et al.
(författare)
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Correlation between photodiode monitoring and high speed imaging of the dynamics causing laser welding defects
- 2008
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Ingår i: Congress proceedings. - Orlando, Fla : Laser institute of America. - 9780912035123 ; , s. 829-837
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Konferensbidrag (refereegranskat)abstract
- Today merely a few monitoring systems for in-process detection of laser welding defects are commercially available. Despite a trend towards cameras, industrially more robust is still a photodiode, measuring in an optically filtered spectral window either the thermal emissions from the melt and vapour or the laser beam reflections. The monitoring rule for each application is identified empirically through correlations between the signal dynamics and welding defects, as the linking mechanism is non-trivial and therefore hardly understood. Thus the method does not provide a systematic guideline to detect a certain welding defect.The here presented approach studies the context between the photodiode signal, the welding defects and the vapour, melt pool, keyhole and temperature dynamics. Simultaneous laser-illuminated high speed imaging is compared to photodiode monitoring at three spectral windows in order to identify through simultaneous timing any linking dynamics in a qualitative manner. Supportive methods are emission modelling and thermal imaging. Several cases of joints, materials and defects were studied to develop an illustrated theoretical description of the defect-signal correlations.
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