Laser transmission welding of white thermoplastics with adapted. The sonimat welding laser solution, lsw, uses a laser beam carried by fiber to the optical processing. The influence of oxide film, such as laser cutting edge or mill scale, on co2 laser welding phenomena and weld characteristics of mild steel was investigated. Plastic welding ultrasonic welding and cutting sonimat. It is an approach to provide costeffective and toolindependent laser welding systems, which are able to compensate for the geometrical deviations that large, three. Within the branch industrial heating and laser systems, leister technologies ag distributes the brands leister, novolas and weldy. However, there is also a variety of other additives, including colorings, that are ir absorbent. We have more than 15 years of experience in developing laser plastic welding processes for welding of both amorphous polymers such as ps, pc, acrylics and.
Recent journal of materials processing technology articles. The gun consists of a main body which contain heating element. Laser plastic welding requires one part to be transmissive to a laser beam and either the other part absorptive or. Semiconductor diode lasers are typically used in plastic welding. A comparison of welding techniques was performed to determine the most effective method for producing aluminum tailorwelded blanks for high volume automotive applications. This is anon contact soldering for high requirements. Welding of lightcoloured or transparent polymers, which is particularly required in the medical device industry, is successfully achieved with co 2 laser in the case of welding thin films or more general by using the above. Pyrometergeregeltes laserschweissen transparenter kunststoffe. Seam welding is the most important pulsed laser application describes the seam welding as a series of overlapping spot welds to form a fusion zone or seam. Park, a study on the co 2 laser welding characteristics of high.
Beam welding technology in the past ten years, laser and electron beam welding processes have seen enormous. It is a noncontact process that requires access to the weld zone from one side of the parts being welded. Quality control laser plastic welding, impossibly consistent. Pyrometer control for laser welding of transparent polymers. This paper will walk you through the pros and cons of each method. Laser welding is currently used by industries for its quality, its high speed and.
Laser transmission welding of thermoplasticspart i. The first piece of plastic is transparent to the laser beam whereas the second plastic is absorbing it. The air mass flow and the temperature can be adjusted in a. Lasers offer a wide range of welding or brazing laser welding with filler material methods. An example using a diode laser manipulated by a sixaxis robot is shown in fig. The purpose of the website is to introduce and educate engineers and designers with the.
J plastics and composites welding handbook, carl hanser verlag, munich, s. It enables to better control all movements and to ensure that the amplitude of the ultrasonic plastic welding device will remain the same. Plastic welding is welding for semifinished plastic materials, and is described in iso 472 as a. Laser welding, unlike conventional arc or gas welding, can be effectively utilised to produce high quality, clean and tough welds in high carbon steels. New applications such as welding of material combinations and the ability to fill opening gaps between the workpieces offer new prospects for laser beam welding processes with filler wire.
A method of joining two plastics by subsequent transmission and absorption of laser energy. This movement allows a continuously operating laser beam to irradiate a line of a speci. The formation and the quality of seam welds are the results of a combination of various pulsed. Laser plastic welding is well suited to work with most any plastic joining need. No i16, jalan pju 1a20f, dataran ara damansara, 47301 petaling jaya, selangor, malaysia. Apr 24, 2002 the influence of oxide film, such as laser cutting edge or mill scale, on co2 laser welding phenomena and weld characteristics of mild steel was investigated. International scientifictechnical and production journal the paton welding journal the paton welding journal has been published monthly since 2000 in english, issn 0957798x. Laser welding with alpha laser laser welding devices. When two component plastic parts need to be joined, laser welding employs four basic steps to accomplish the task. The process allows contactfree processing of a wide range of materials in different material thicknesses. Examinations were made on the weld characteristics which were. Malaysias laser plastic welding equipment manufacturer. Laser welding in an innovative joining technique for plastics and offer advantages that cannot be achieved with any other process at this time.
This welding has come into use not only for 490 n mm2 grade steel and 590 nmm2 grade steel but also for weatherresistant steel. Fcw, with which upward welding is possible at high currents, is used when the gap is large. The laser welded dimple jacket is a sheet of metal which has a uniform array of depressions or dimples pressed into the metal by the latest laser welding technology, and then inflated to form flow pass. Aluminum sheet was joined with an emphasis on post weld formability, surface quality and weld speed. The welding of thermoplastics using co2 laser achieved, two different types of. Pdf applications of laser welding for the joint of. Citescore values are based on citation counts in a given year e. Schematic of hotgas welding, showing the correct position of torch and filler rod for different thermo plastic 4. It shows great advantages over fsw and conventional fusion welding due to its high flexibility and adaptabil.
This was a direct laser welding process, where the laser heated the films directly without the laser being transmitted through the upper part of the joint. Laser welding of plastics is a relatively new process that induces locally a fast polymer heating. The welded chair will be fed out of the system for manual removal and replaced by a. Welding for blood analysis device, laser technik journal, s. Advanced laser welding of highperformance thermoplastic. Laser plastic welding is leaving a noticeable mark in the assembly world.
The welding journal has been published continually since 1922 an unmatched link to all issues and advancements concerning metal fabrication and construction each month the welding journal delivers news of the welding and metal fabricating industry. The objective of the study is to investigate the effects of physical properties of plastics on the weldability and the quality of the dissimilar materials welding between sus304 stainless steel and plastics. Whether joint welding or deposition welding, with wire or with powder. Westgate, fiberdelivered laser welding of ultrahigh strength steels for automotive application, twi report no.
The majority of the reported experiments on laser welding of magnesium alloys were conducted using co 2 or nd. Leisters innovative and patented laser bonding solutions provide alternative production processes in automotive, medical, sensor. From microfluidic devices, created at unparalleled accuracy, to cleanroom class v applications, impossible with other welding methods. Welding of plastics requires appropriate experience to prevent failure to maintain important process variables, such as overheating of the welding site, improper preparation of welded edges, or. This is typically accomplished by using new materials of changing part geometries. Contour welding involves relative motion between the laser beam and the thermoplastic parts in a direction perpendicular to the beam of the laser. During the transmitting welding the laser beam is transmitted by the first join partner and absorbed by the second join partner. To guarantee good quality, vertical distance variations between wire tip and weld pool are, above all, not permissible as this causes globular metal transfer and would accordingly result in strongly rippled. In this paper, unless specified, dualbeam laser welding means two laser beams are arranged in tandem, as shown in fig. Influence of oxide film on weld characteristics of mild.
Stay informed on the latest products, trends, technology and events via in. The process is very much different than traditional metal welding. Characteristics of tig arcassisted laser weldingbrazing. However, each joining method has its own set of advantages and disadvantages. Microstructural characteristics and mechanical properties. Dissimilar materials laser welding between stainless steel. The paton welding journal is a covertocover english translation of the avtomaticheskaya svarka automatic welding journal. Lightweight construction in the automotive industry is a fight for every pound. Results of welding high carbon steel are presented. Sonimat was the first company in the world to choose digital technology and control for his generators in order to better monitor the plastic welding process and to obtain an optimized welding quality. Weld strength of laserwelded hotpressforming steel. European space agency awards contract for development of design for additive manufacturing applications. Transmission welding of transparent to absorbing plastics is a proven. It is inconceivable that a modern vehicle can be manufactured without laser welding as part of the production process.
With 3 million listed companies, mainly manufacturers, wholesalers, distributors and service providers, every month europages attracts more than 2 million decisionmakers searching for business partners, suppliers or service providers in europe and worldwide. A throughtransmission welding process, polymer welding provides the ability to precisely weld most thermoplastics. Laser plastic welding, a roughly decadeold assembly method, boasts its own resume of breakthrough applications. The results show that the assisted tig arc optimizes the interface reaction. Laser plastic welding ultrasonic welding and cutting. The spreading behavior of liquid metal on the back of the galvanized steel at different assisted welding currents was also investigated. Safety with lasers and other optical sources, plenum press, new york, available from laser institute of america, 12424 research parkway, orlando, fl 32826. I0 enters the material and is attenuated according to lambert ex as the extinction coefficient. Laser plastic welding is considerably more effective in comparison with conventional gluing or ultrasonic welding methods and guarantees highstrength joints without markings and surface damage. Laser welding of plastics was first reported in the early 1970s silvers and wachtell, 1970, when film materials were welded using a co 2 laser. Dec 12, 2019 laser beam welding is a technique in manufacturing whereby two or more pieces of material usually metal are joined by together through use of a laser beam. Our laser welding systems yield highstrength precision seams. The laser welding procedure used for textiles is generally based on the clearweld method of transmission laser welding, but direct welding using either diode or co 2 laser sources is also feasible.
Relevant research papers by the worlds foremost scientists, engineers, teachers and industry professionals, are published monthly in the welding journal and are also available for download in pdf format. For most applications, the process involves directing a pulsed beam of visible light at the weld. Comparing laser welding technologies with friction stir. Laser welding of butt joints, which were different in location and thickness of oxide film, were performed. Every single part is investigated for whether it could be made even lighter. Plastic welding laser fraunhofer usa center for laser. During the last decade a number of laser manufacturers in europe and the usa have. With this technique, the energy to melt the thermoplastic is brought into the material all at once. Waveguides direct and distribute laser energy simultaneously and homogeneously along the weld line. Laser stands for l ight a mplification by s timulated e mission of r adiation. The concept involves passing a focused laser beam through an upper, laser transmissive part to the interface of the two parts to be joined.
The laser weldingbrazing lwb process has been widely used in the automotive industry due to its unique performance such as high welding speed, low base metal deformation, and precise control of the laser beam energy refs. Europages is a european b2b platform available in 26 linguistic versions. Laser plastic welding a blog and resource site about laser plastic. Laser welding with laser welding machines from alpha laser. International scientifictechnical and production journal the paton welding journal. Laser welding is a precondition for compact, weightoptimised components and. Nowadays, dissimilar materials welding, especially between metal to plastics, has been become the hottest issue. Laser beam welding using two lasers, or dualbeam laser welding, is an emerging welding technology. Laser beam welding is a technique in manufacturing whereby two or more pieces of material usually metal are joined by together through use of a laser beam. Schematic of hotgas welding, showing the correct position of torch and filler rod for different thermoplastic 4. Research paper study of laser welding technique for.
The optical processing produces a spot to weld plastic parts without any contact advantages of sonimats laser plastic welding solution. Innovative, particlefree welding process via contactless heating through laser radiation with high weld strength. Laser welding for metals and plastics es technology. Jaeschke, laser transmission welding of continuous carbon fibre reinforced plastics and thermoplastic polymers, dissertation, leibniz university hanover, 2012. Download our laser plastic welding design manual on through transmission. With laser technology the welding process can be performed very cleanly and precisely. The current study focused on the tandem dualbeam laser welding process and its impact on weld quality. Tungsten inert gas tig arcassisted laser weldingbrazing was used for the butt joining of 5a06 aluminum alloy to the galvanized steel by preset filler powder without groove. Welding research weld morphology and thermal modeling in. Laser plastic welding, also often referred to as throughtransmission welding, is a process of bonding plastic using focused laser radiation.
Lefon develops its own inhouse world class laser welding machine. Use laser plastic welding to get particulate free welds, precise control of the. Safety with lasers and other optical sources, plenum press, new york, available from laser institute of america, 12424 research parkway, orlando, fl. The weld characteristics related to the fast cooling rate were critically evaluated and methods to reduce the rate of cooling were developed. In experiment, the lap joint configuration with sus304 put on the top was. The purpose of the research is to take an uptodate look at laser welding technology currently being utilized. Underwater laser welding of steel, journal of laser applications, 6 1994, pp 112229.
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