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• W2127995316 abstract "Laser transmission welding (LTW) of polymers is a direct bonding technique which is already used in differentindustrial applications sectors such as automobile, microfluidic, electronic and biomedicine. This technique offersseveral advantages over conventional methods, especially when a local deposition of energy and minimum thermaldistortions are required. In LTW one of the polymeric materials needs to be transparent to the laser wavelength and thesecond part needs to be designed to be absorbed in IR spectrum. This report presents a study of laser weldability of ABS(acrylonitrile/butadiene/styrene) filled with two different concentrations of carbon nanotubes (0.01% and 0.05% CNTs).These additives are used as infrared absorbing components in the laser welding process, affecting the thermal and opticalproperties of the material and, hence, the final quality of the weld seam.A tailored laser system has been designed to obtain high quality weld seams with widths between 0.4 and 1.0mm. Itconsists of two diode laser bars (50W per bar) coupled into an optical fiber using a non-imaging solution: equalization ofthe beam quality factor (M2) in the slow and fast axes by a pair of micro step-mirrors. The beam quality factor has beenanalyzed at different laser powers with the aim to guarantee a coupling efficiency to the multimode optical fiber. Thepower scaling is carried out by means of multiplexing polarization technique. The analysis of energy balance and beamquality is performed in two linked steps: first by means ray tracing simulations (ZEMAX®) and second, by validation.Quality of the weld seams is analyzed in terms of the process parameters (welding speed, laser power and clampingpressure) by visual and optical microscope inspections. The optimum laser power range for three different weldingspeeds is determinate meanwhile the clamping pressure is held constant. Additionally, the corresponding mechanicalshear tests were carried out to analyze the mechanical properties of the weld seams. This work provides a detailed studyconcerning the effect of the material microstructure and laser beam quality on the final weld formation and surfaceintegrity." @default.
• W2127995316 created "2016-06-24" @default.
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• W2127995316 date "2012-06-01" @default.
• W2127995316 modified "2023-10-18" @default.
• W2127995316 title "Laser transmission welding of Acrylonitrile-Butadiene-Styrene (ABS) using a tailored high power diode-laser optical fiber coupled system" @default.
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• W2127995316 doi "https://doi.org/10.1117/12.922570" @default.
• W2127995316 hasPublicationYear "2012" @default.
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