It requires a particularly bright laser to get energy into the part without doing more harm than good (or reflecting back into your peepers). Alibaba.com offers 11,044 laser welding of aluminum products. You will find aluminum and its alloys in industries as varied as aerospace and sporting goods and electronics and consumer packaging. Each weld area created by a pulse cools quickly, which minimizes the amount of heat in the surrounding material, which in turn limits how hot the part might become, which in turn minimizes melting and distortion of the part. Laser beam energy can be applied to the work piece either as a series of pulses, as a continuous beam, or in a laser stir weld configuration. Prudence dictates that aluminum parts which are to be welded should be pre-weld processed in a such a manner that minimal to no lubricants are used â sawing and machining of aluminum should be performed dry, if possible, and if not, the parts must be throughly cleaned. Reflectivity is the most critical challenge with laser welding. Laser welding uses laser as a high-energy density light source, which has the characteristics of fast heating and instant solidification. [4, 5] Patterns can be programmed to compensate for large gaps in weld joints and other potentially problematic weld geometry problems. Choice of cover gas is generally dependent on the type of laser and its power rating as the use of the wrong cover gas can result in access plasma generation and/or changes to the properties of the welded materials. As stated earlier, cover gases are often required when laser welding aluminum. Please contact us today for more information. As little as a decade ago, laser welding aluminum was considered to â¦ All other alloys can only be laser welded with the help of additives. Aluminum has certain properties which make it more challenging to weld than other metals. Clean the surface before welding – the main cause of porosity is the evolution of hydrogen gas during weld metal solidification. With this in mind, there is keen interest in the use of laser welding to produce lightweight and economical vehicle structures in aluminium. Use a stainless steel wire brush to clean a joint only after solvent cleaning.Â Wire brushing prior may imbed hydrocarbons and other contaminates in the aluminum. FIGURE 1 shows the effect of laser power (2â5.3kW), welding speed, and the gap between the sheets on weld porosity formation with a fillet edge welding configuration using a filler wire of AA4043 (5.3% Si) . The process is frequently used in high volume applications using automation, as in the automotive industry. Aluminum Laser Welding Machine Manufacturers, Factory, Suppliers From China, We've been confident that there'll become a promising future and we hope we can have long lasting cooperation with consumers from all over the world. Modulated output from continuous wave lasers can also help with cracking and porosity . More precise control of the weld pool for increased keyhole stability. Oxidation issues can lead to contamination and porosity problems. The decision to use a particular method is dependent on the application, the properties of the materials, etc. How fortunate that new laser technology has evolved to fit the bill. Aluminum alloys with manganese can only be processed to a limited extent by laser welding. For welding heat sensitive components, such as electronics housings, using filler materials and welding with a pulsed laser is indicated. Partner with OR Laser to find your unique solution for welding aluminum items efficiently. Medical Devices: a Study in Collaboration, Extraordinary Demands in Extraordinary Times. The near infrared 1070 nm wavelength has definite advantages over the incumbent CO 2 laser technology due to the lower reflectivity of metals at this wavelength. Although in recent years, laser welding in a vacuum has taken ground, it is yet to be entirely accepted in the welding industry. However, due to the high reflectivity and good thermal conductivity of aluminum alloy and the shielding effect of plasma, some defects â¦ The present investigation was mainly concerned with characteristics of autogeneous laser butt welding of 2âmm thickness nonheat treatableAA5052-H12,AA5083-H12 and 2âmm, 3âmmthickness heat treatableAA6061-T6aluminum alloys. Mg, Zn). However, for welds with deeper penetration in crack prone aluminum alloys, weâve had a lot of success using our proprietary Laser Stir Welding technique. Laser welding also has one of the highest initial investments, tooling costs, and weld joint fit-up requirements These must be accounted for when selecting laser welding as the joining method for your production process. Major Challenge of Laser Welding. However, each process has slightly different characteristics which can make some types of lasers preferable for certain applications, joint configurations, and aluminum alloy combinations. Each pulse creates an area of melted material, the work piece is then moved slightly and another pulse is applied, resulting in a series of overlapping welds create a continuous bead. Hydrocarbon contamination must be removed before abrading the surface to remove aluminum oxide. Nd:YAG (Neodymium: Yttrium-Aluminum-Garnet). Sheared edges are acceptable provided they are straight and square. Porosity. High-brilliance lasers allow fast, low-heat deep penetration laser welding to produce narrow seams even in metal foils. Mg, Zn). Continuous wave lasers typically feed at speeds of 25 to 100 inches per minute in order to not overheat the parts. A wide variety of laser welding of aluminum options are available to you, such as warranty of core components, local service location, and key â¦ The main tenets of these procedures are summarized below. Therefore, itâs no surprise that they are being used with increased frequency in product manufacturing applications ranging from batteries and electronics packaging, to automotive components and consumer goods packaging. Machining methods that leave a ground or smeared surface should be avoided.Â For example, a band saw willÂ leaveÂ metal smeared along the path of the blade.Â This problem can be overcome by filing or machiningÂ the joint edge post cutting. Laser welding; Laser welding A laser beam can join metal in different ways â it can join workpieces at the surface or create deep weld seams. A fit-up tolerance of 15% of the material thickness is desirable. The wide and growing use of aluminum alloys is a result of its defining properties which include: Density – aluminum is the lightest of all ordinary metals. The heat affected zone is minimized and weld penetration can range up â¦ If grinding cannot be avoided, use a course disk. The amount of pre-weld preparation is largely dependent on the condition of the aluminum parts to be welded, and that is generally dependent on the storage conditions and the cleanliness of the machine procedures used to make the part thus far. Stable keyhole welding – high power lasers with good beam quality produce a stable keyhole during welding. Higher mechanical strength aluminum-steel weld joints has been demonstrated with TIG, MIG, electronic beam, and laser welding. © 2020 by EB Industries. Laser beam welding can be used with crack sensitive materials, such as the 6000 series of aluminum alloys when combined with an appropriate filler material such as 4032 or 4047 aluminum. Deep-penetration welding allows for a single weld to replace multiple welds in different joint designs. Diversity of alloys (see Table below for a summary of the main aluminum alloys). We never spam, we never sell our mailing list. Good weld fixturing is necessary so that the laser beam can be placed accurately. The effect of laser welding parameters,surface cleaning, filler wire addition, and backing strip on quality of laser welded joints was clarifiedusing 5âkW laser machine. Here, the welding of 100 µm thick aluminum foils in lap joints is investigated. Alternatively, there are chemical cleaning methods utilizing immersions in caustic solutions and water that are effective at removing aluminum oxide. Weld profiles can be manipulated into asymmetry, such as increasing the penetration on one side of the weld joint. Laser welding requires a fairly precise joint in order to maintain permissible gap and mismatch. GMAW (MIG) Services. 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