Готові списки джерел за темами / Simultaneous laser welding

Добірка наукової літератури з теми "Simultaneous laser welding"

Автор: Grafiati

Опубліковано: 14 березня 2023

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Статті в журналах з теми "Simultaneous laser welding"

Liu, Y. N., and E. Kannatey-Asibu. "Laser Beam Welding With Simultaneous Gaussian Laser Preheating." Journal of Heat Transfer 115, no. 1 (February 1, 1993): 34–41. http://dx.doi.org/10.1115/1.2910666.

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An analytical solution of the dual, laser beam welding process is presented. It is based on a Gaussian distributed leading heat source for preheating, followed by a line source for the actual welding process. The effect of beam distribution parameters as well as interbeam spacing and relative power intensities on the resulting temperature distribution and cooling rate are presented. For a preheating Gaussian source of power 1550 W, the depth of region above 500°C is 2.25 mm, and that above 250°C is 3.5 mm. The cooling rate at the weld centerline without preheating for a temperature of 650° C, input power 1800 W, and welding velocity 20 mm/s is found to be 1004°C/s. Under the same conditions, the cooling rate with a 1550 W preheating Gaussian distributed heat source (beam distribution parameter 1 mm, and interbeam spacing 10 mm) is reduced to 570°C/s.

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Wilke, L., H. Potente, and J. Schnieders. "Simulation of Quasi-Simultaneous and Simultaneous Laser Welding." Welding in the World 52, no. 1-2 (January 2008): 56–66. http://dx.doi.org/10.1007/bf03266617.

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Schmailzl, Anton, Stefan Hierl, and Michael Schmidt. "Gap-bridging During Quasi-simultaneous Laser Transmission Welding." Physics Procedia 83 (2016): 1073–82. http://dx.doi.org/10.1016/j.phpro.2016.08.113.

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Jankus, S. M., and R. Bendikienė. "Laser beam positioning in quasi-simultaneous laser transmission welding of polymers." Proceedings of the Estonian Academy of Sciences 71, no. 4 (2022): 350. http://dx.doi.org/10.3176/proc.2022.4.05.

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Hopmann, Christian, and Suveni Kreimeier. "Modelling the Heating Process in Simultaneous Laser Transmission Welding of Semicrystalline Polymers." Journal of Polymers 2016 (October 27, 2016): 1–10. http://dx.doi.org/10.1155/2016/3824065.

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Laser transmission welding is an established joining process for thermoplastics. A close-to-reality simulation of the heating process would improve the understanding of the process, facilitate and shorten the process installation, and provide a significant contribution to the computer aided component design. For these reasons a thermal simulation model for simultaneous welding was developed which supports determining the size of the heat affected zone (HAZ). The determination of the intensity profile of the laser beam after the penetration of the laser transparent semicrystalline thermoplastic is decisive for the simulation. For the determination of the intensity profile two measurement systems are presented and compared. The calculated size of the HAZ shows a high concordance to the dimensions of the HAZ found using light microscopy. However, the calculated temperatures exceed the indicated decomposition temperatures of the particular thermoplastics. For the recording of the real temperatures during the welding process a measuring system is presented and discussed.

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Rajulu, C. Govinda, A. Gopala Krishna, and Thella Babu Rao. "An integrated evolutionary approach for simultaneous optimization of laser weld bead characteristics." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 8 (September 19, 2016): 1407–22. http://dx.doi.org/10.1177/0954405416667431.

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The selection of optimal welding parameters in any welding process significantly improves the quality, production rate, and cost of a component. The weld bead characteristics such as bead width, depth of penetration, and heat-affected zone are the prominent factors for evaluating the performance of a welded joint. The work presents a novel evolutionary multi-objective optimization approach to derive the optimal laser welding conditions for the weld bead geometrical parameters. The welding experiments were conducted with the consideration of pulse frequency, pulse width, welding speed, and pulse energy as the process-control variables to evaluate the weld bead characteristics. Empirical models for the bead characteristics were developed in terms of the input variables using response surface methodology. The individual and interactive effects of the variables on the responses were also analyzed. As the influence of control variables on the bead characteristics is conflicting in nature, the problem is formulated as a multi-objective optimization problem to simultaneously optimize the output parameters. The aim is to simultaneously minimize the bead width, maximize the depth of penetration, and minimize the heat-affected zone. An efficient evolutionary algorithm called non-dominated sorting genetic algorithm-II was applied to derive the set of Pareto-optimal solutions. The derived optimal process responses were confirmed with the experimental values. The proposed integrated methodology can be applied to any welding process to automate the process conditions in computer-integrated manufacturing environment.

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Nguyen, Nam-Phong, Stefan Behrens, Maximilian Brosda, Alexander Olowinsky, and Arnold Gillner. "Modelling and thermal simulation of absorber-free quasi-simultaneous laser welding of transparent plastics." Welding in the World 64, no. 11 (August 25, 2020): 1939–46. http://dx.doi.org/10.1007/s40194-020-00973-5.

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Abstract The growing demands on the quality of plastic components and the trend towards miniaturisation are posing a great challenge on plastics processing technology. As many complex components can no longer be manufactured in a single step, joining processes such as laser transmission welding are gaining in importance. In classic laser transmission welding, the joining partners have different optical properties. The upper joining partner is transparent in the laser wavelength range, whilst the lower partner is absorbent due to the addition of absorber materials. In medical and biotechnological applications, the addition of absorber materials is often undesirable due to strict biocompatibility requirements. If, on the other hand, radiation sources are used which emit radiation in the area of the natural absorption of the plastic (λ = 1600–2000 nm), untreated transparent plastics can also be welded. In this work, a theoretical model will be presented to calculate the temperature distribution and progression during quasi-simultaneous welding using a thulium fibre laser (λ = 1940 nm). A sensitivity analysis is carried out to investigate the influence of different parameters on the heat affected zone (HAZ). The simulated HAZ is then compared with the HAZ from the experimental work.

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SATO, Hirotaka, Shinya HAYAKAWA, Takashi NAKAMURA, and Fumihiro ITOIGAWA. "E16 Welding Strength of Each Welding Plane in Simultaneous Multi-layer Laser Welding of Transparent Resin plates." Proceedings of The Manufacturing & Machine Tool Conference 2012.9 (2012): 279–80. http://dx.doi.org/10.1299/jsmemmt.2012.9.279.

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Udin, Ilya Nikolaevich, A. A. Voropaev та A. Unt. "Аpplication Development for the Evaluation of Penetration in Laser and Laser-Arc Hybrid Welding of Tee and Corner Joints". Key Engineering Materials 822 (вересень 2019): 381–88. http://dx.doi.org/10.4028/www.scientific.net/kem.822.381.

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Анотація:

Laser technologies deservedly take their place in modern mechanical engineering production. Using laser source for welding has already become common. However, the creation of critical welded constructions is impossible without extensive technological surveys, which can be greatly simplified by using a computational experiment. To achieve this goal, special programs are usually used. That can be unjustified difficult and thereby awkward for technological practice. The article describes an application built on the basis of a simplified model for calculating the temperature field for the cases of laser and laser-arc welding of internal fillet welds as well as single-sided T-joints and simultaneous double-sided welds. The results of calculations by the model and comparing them with experimental data have shown that it is sufficiently adequate for use in technological purposes. The developed application contemporaneously has a simple and intuitive interface, does not require significant computational resources and can be used for quick preliminary estimation of the result of welding for the selected type of weld.

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Liu, Chao, Hui Wang, Yu Huang, Youmin Rong, Jie Meng, Gen Li, and Guojun Zhang. "Welding seam recognition and tracking for a novel mobile welding robot based on multi-layer sensing strategy." Measurement Science and Technology 33, no. 5 (February 16, 2022): 055109. http://dx.doi.org/10.1088/1361-6501/ac3d06.

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Abstract That a mobile welding robot with an adaptive seam tracking ability can greatly improve welding efficiency and quality has been extensively studied. To further improve automation in multiple-station welding, we developed a novel intelligent mobile welding robot consisting of a four-wheeled mobile platform and a collaborative manipulator. With the support of simultaneous localization and mapping (SLAM) technology, the robot is capable of automatically navigating to different stations to perform welding operations. To automatically detect the welding seam, a composite sensor system including an RGB-D camera and a laser vision sensor is creatively applied. Based on the sensor system, a multi-layer sensing strategy is performed to ensure that the welding seam can be detected and tracked with high precision. By applying a hybrid filter to the RGB-D camera measurement, the initial welding seam could be effectively extracted. Next, a novel welding start point detection method is proposed. Meanwhile, to guarantee the tracking quality, a robust welding seam tracking algorithm based on laser vision sensor is presented, to eliminate the tracking discrepancy caused by the platform parking error, through which the tracking trajectory can be corrected in real-time. The experimental results show that the robot can autonomously detect and track the welding seam effectively at different welding stations. Also, multiple-station welding efficiency can be improved and quality can also be guaranteed.

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Більше джерел

Дисертації з теми "Simultaneous laser welding"

Hsing-Shun, Huang, and 黃性順. "Post-Weld Shift of Spot Welding for TO-CAN Package using Simultaneous Multi-Beam Lasers." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/81761602424509457537.

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碩士
國立屏東科技大學
車輛工程系所
95
When the laser beam is incident on the work piece, the surface of the work piece will melt due to heat transfer. Once the laser energy is no more to be deposited on the work piece, the surface temperature of the work piece will reduce and result in solidifying phenomena. During the total process of phase change the expansion and solidification shrinkage will occur on welding parts and results in a so-called post-weld shift. This research is mainly to investigate the effects of different parameters on post-weld shift of spot welding for TO-CAN package using simultaneous multi-beam lasers. The simulation results show that there is no displacement in X-direction and Y-direction when the three laser beams are incident on the TO-CAN part in an angle 45 degree with the same laser power. But the expansion and solidification shrinkage will cause the displacement in the Z-direction, which can be improved by increasing loading on the work piece. Moreover, adjusting the power of someone laser beam will cause the displacement. The greater the energy difference between the laser beams is, the more the displacement produced.

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Частини книг з теми "Simultaneous laser welding"

Duggan, G., M. Tong, and DJ Browne. "Front Tracking Model of Simultaneous Melting and Solidification during Multiple Layer Deposition in GMA Welding." In PRICM, 3017–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.ch373.

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Duggan, G., M. Tong, and D. J. Browne. "Front Tracking Model of Simultaneous Melting and Solidification During Multiple Layer Deposition in GMA Welding." In Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing, 3017–24. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48764-9_373.

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Acherjee, Bappa, Debanjan Maity, Arunanshu S. Kuar, Souren Mitra, and Dipten Misra. "Optimization of Laser Transmission Welding Parameters Using Chicken Swarm Optimization Algorithm." In Handbook of Research on Manufacturing Process Modeling and Optimization Strategies, 142–61. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2440-3.ch007.

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The ever-increasing demand of high quality joints with improved cycle times leads the industries, those involve welding of plastics, to use laser for welding plastics. Laser transmission welding is the latest development in the field of welding of plastics. In present research work, experimental investigation, parametric modeling and optimization of laser transmission welding of polycarbonate is carried out. A systematic experimental plan is executed using central composite design of response surface methodology (RSM). Mathematical models are developed using RSM for establishing an interrelationship between the process parameters and the responses of interest. Chicken swarm optimization (CSO) algorithm is employed with the developed RSM models to set the optimal process parameters combinations to achieved desired weld qualities. Here, the objectives are set as to increase the weld strength and decrease the weld width independently, as well as simultaneously. The interdependent parametric trends are also studied and discussed.

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Тези доповідей конференцій з теми "Simultaneous laser welding"

Russek, U. A., H. Staub, A. Palmen, and H. Kind. "Simultaneous laser beam welding of thermoplastics – Innovations and challenges." In ICALEO® 2003: 22nd International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2003. http://dx.doi.org/10.2351/1.5060068.

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Piili, Heidi, Lauri Taimisto, Tuomas Purtonen, Petri Laakso, and Antti Salminen. "Computer simulation of quasi-simultaneous welding process of polycarbonate." In ICALEO® 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2009. http://dx.doi.org/10.2351/1.5061678.

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Abed, Stephane, Wolfgang Knapp, Martin Traub, Dieter Hoffmann, Reinhart Poprawe, and Peter Loosen. "Development of simultaneous laser welding process applied to thermoplastic polymers." In ICALEO® 2004: 23rd International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2004. http://dx.doi.org/10.2351/1.5060279.

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Laakso, Petri, Saara Ruotsalainen, Tuomas Purtonen, Hannu Minkkinen, Veli Kujanpää, and Antti Salminen. "Simultaneous sub second laser welding of polymers with diffractive optics." In ICALEO® 2010: 29th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2010. http://dx.doi.org/10.2351/1.5062059.

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Ruotsalainen, Saara, Petri Laakso, Matti Manninen, Tuomas Purtonen, Veli Kujanpää, and Antti Salminen. "TWINQUASI – A new method for quasi-simultaneous laser welding of polymers." In ICALEO® 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2012. http://dx.doi.org/10.2351/1.5062454.

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Jansson, Anssi, Saara Kouvo, and Veli Kujanpää. "Quasi-simultaneous laser welding of polymers - the process and applications for mass-production." In ICALEO® 2005: 24th International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2005. http://dx.doi.org/10.2351/1.5060516.

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Laakso, Petri, Saara Ruotsalainen, Tuomas Purtonen, Mikko Rikkonen, Antti Salminen, and Veli Kujanpää. "Effect of variable power control in quasi-simultaneous fiber laser welding of polymers." In ICALEO® 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2011. http://dx.doi.org/10.2351/1.5062335.

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Ilar, Torbjörn, Ingemar Eriksson, and Alexander F. H. Kaplan. "Simultaneous top and root high speed imaging on droplet formation in laser welding." In ICALEO® 2013: 32nd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2013. http://dx.doi.org/10.2351/1.5062887.

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Ruotsalainen, Saara, Petri Laakso, and Veli Kujanpää. "Quasi-simultaneous laser welding of transparent polymers by using beam off-setting scanning technique." In ICALEO® 2013: 32nd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2013. http://dx.doi.org/10.2351/1.5062866.

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Seidel, Bernd, Christian Koerber, Klaus Behler, and Eckhard Beyer. "New method for process monitoring in high-power simultaneous laser beam welding." In Lasers, Optics, and Vision for Productivity in Manufacturing I, edited by Georges Sayegh and Michael R. Osborne. SPIE, 1996. http://dx.doi.org/10.1117/12.251196.

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