Patent
Method for laser welding a fin and a tube
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TLDR
In this article, a method of laser welding a planar metal surface to a cylindrical metal surface is provided, where the planar surface is placed into approximate contact with a cylinear surface to form a juncture area to be welded, and a laser beam is focused through the acute angle of contact at the junction area.Abstract:
A method of laser welding a planar metal surface to a cylindrical metal surface is provided, first placing a planar metal surface into approximate contact with a cylindrical metal surface to form a juncture area to be welded, the planar metal surface and cylindrical metal surface thereby forming an acute angle of contact. A laser beam, produced, for example, by a Nd:YAG pulsed laser, is focused through the acute angle of contact at the juncture area to be welded, with the laser beam heating the juncture area to a welding temperature to cause welding to occur between the planar metal surface and the cylindrical metal surface. Both the planar metal surface and cylindrical metal surface are made from a reflective metal, including copper, copper alloys, stainless steel alloys, aluminum, and aluminum alloys.read more
Citations
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Patent
A heat exchanger
TL;DR: In this article, a heat exchanger is constructed from steel alloy having alloyed components which reduce the hardness of said steel alloy to facilitate tube bending, thereby allowing the first tube to be bent during installation within the heat transfer system.
Patent
Laser welding boiler tube wall panels
TL;DR: In this paper, a method of welding together the parts of a boiler tube wall panel includes placing at least two parts of the panel to be welded together along a weld line and adjacent each other, and forming a weld along the weld line using a laser beam.
Patent
Laser beam welding method
TL;DR: In this paper, the length of the welding seam formed was defined as the product of pulse duration of the laser pulse and the relative velocity of the work piece and laser pulse divided by the number of applications.
Journal ArticleDOI
Study on the microstructure and mechanical properties of Nd:YAG pulsed laser beam weld of UNS-C17200 copper beryllium alloy
TL;DR: In this paper, the microstructure of Nd:YAG pulsed laser welding of copper beryllium sheet has been investigated by tensile and hardness tests, optical and scanning electron microscopy (SEM) and X-ray diffraction (XRD) images revealed three distinct solidified structures due to various thermal gradients occurred in the fusion zone.
Patent
Absorber for a thermal solar collector and method for the production of said absorber
TL;DR: In this paper, an absorber for a thermal solar collector, consisting of a sheet metal plate and at least one thermal fluid pipe, was proposed, and the continuous weld connection was provided in the curved section of the pipe.
References
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Patent
Laser beam welding
TL;DR: In this article, a laser beam welding apparatus comprising a body with a passage through which the laser beam is directed and focused to a position outside the body closely adjacent to a terminal portion of the passage.
Patent
Method of welding
TL;DR: In this paper, a laser keyhole weld without filler metal is made in one pass, full penetration is achieved by two laser keyholes welds without filler material (one made from each side), or resistively heated filler wire is fed into the metal pool of a laser conduction weld in one or more passes along each side of the confronting surfaces to be joined.
Patent
Narrow gap laser welding
John O. Milewski,Edward Sklar +1 more
TL;DR: A laser welding process using optical ray tracing to make a model of a laser beam and the geometry of a joint to be welded, adjusting variables in the model to choose variables for use in making a laser weld, and then welding the joint using the chosen variables as discussed by the authors.
Patent
Apparatus for producing heat exchanger tubes
TL;DR: In this article, a rotating tube has helically wound on its outer surface a strip that forms the fins, with this strip being fed to the tube surface under tension, and with the bottom edge of the strip being welded on the tube.