It is based on keyhole or penetration mode welding. Finally, the author explains applications of laser welding plastics using several industrial case studies from the automotive industry, household goods, and medical devices. Plastic welding laser welding of plastics is an established process that is increasingly used in different markets and is displacing the traditional welding methods. During the transmitting welding the laser beam is transmitted by the first join partner and absorbed by the second join partner. Presently, researchers are working mainly on the welding of metals. From microfluidic devices, created at unparalleled accuracy, to cleanroom class v applications, impossible with other welding methods. Polymer processing xxii 2007 1 carl hanser verlag, munich 43 fig. Welding of transparent materials using femtosecond laser. The process is very much different than traditional metal welding. Laser plastic welding requires one part to be transmissive to a laser beam and either the other part. Laser plastic welding, also known as through transmission welding, is quite simple in its essence see basic process video. Integrated laser source pneumatic sliding door available for seated or standing work position cnc controller beckhoff clamping device standard accuracy clamping fixed base plate with glass plate or welding.
Laser welding of transparent polymers by using quasi. 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. In hot gas air welding, the heat transfer medium is a heated gas, in general clean air. Laser plastic welding is leaving a noticeable mark in the assembly world. The welding of thermoplastics using co2 laser achieved, two different types of. Manipulation equipment is available to position components and the laser. Laser plastic welding, a roughly decadeold assembly method, boasts its own resume of breakthrough applications. Laser plastic welding, also often referred to as throughtransmission welding, is a process of bonding plastic using focused laser radiation.
Plastic welding, ask latest information, plastic welding abstract, plastic welding report, plastic welding presentation pdf,doc,ppt, plastic welding technology. Although there are many methods for joining thermoplastics, laser plastic welding. The processes and applications of laser welding are most prominent in the automotive industry, where lasers boost productivity at a low cost when welding. Diode lasers in plastic welding and selective laser. All principal fastening and joining methods used to assemble plastic parts today are. Tailored to the needs of everyone dealing with laser welding of plastics. Safety with lasers and other optical sources, plenum press, new york, available from laser. In medical device manufacturing, for instance, cleanliness is absolutely mandatory. The book has been completely updated and a new chapter on laser welding of plastics was added. Influence of surface pretreatments on laser welding of ti6al4v alloy article pdf available in journal of materials engineering and performance 235 march 2014 with 4 reads. A commonly used additive to make plastic absorbent for ir laser light is carbon black typically 0. Although there are many methods for joining thermoplastics, laser plastic welding has a few clear advantages.
The process is frequently used in high volume applications using automation, as in the automotive industry. Application of laser welding technologies to automotive. The effect of the laser welding parameters such as laser power, welding speed. Plastics welding plastics welding is the process of joining two pieces of thermoplastics.
Laser plastic welding a blog and resource site about. Yag diode wavelength nm 10,600 1,064 800, maximum power w 60,000 6,000. Underwater laser welding of steel, journal of laser applications, 6 1994, pp 112229. Leister is the only provider of all standard laser welding processes in the industry including two patents for key laser delivery methods mask welding and globo welding. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. In conventional infrared laser welding of plastics, the socalled through transmission infrared ttir laser welding. Laser welding of polypropylene using two different sources. Laser welding has advantages of high speed, high precision, consistent weld integrity, and low heat distortion. Laser heat treatment of lowalloy ultrahighstrength steel, laser welded joints after laser heat treatment, the range of plastic deformation expanded, which led to a larger bending radius and. Heryueh huang, effects of activating flux on the welded joint characteristics in gas metal arc welding. Delivering a focused heat source, laser welding creates a strong seam at a high speed.
In the infancy of plastic welding, the use of nitrogen proved most successful in preventing material. Typical serial application in laser plastic welding. 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. The two parts are joined when the melt zone is produced at the contact interface. Penetration depth in laser beam welding an analysis resulted in two expressions for depth of penetration, both of which can be used to determine laser beam welding parameters for any steel by e. Cycle times can be further reduced and production costs can be minimized at the same time as raising your productivity.
Different type of plastics with welding temperature. The wide array of applications is explained quite simply by the advantages of the procedure and variety of welding. Pdf influence of surface pretreatments on laser welding. Laser welding is a widely used jointing technique in many. The welded samples were characterized by carrying out visual and microscopic inspection for the welding. Laser febmarch 2017 kopfarbeit mit dem laserstrahl. Laser welding plastics is on the rise the laser welding procedure has without question established itself in the plastic welding industry. Laser welding is one of the welding methods which are applied in the production of automotive bodies. The laser transparent material should have a laser. The carbondioxide co 2 laser is a wellestablished materials processing tool commonly used for cutting plastics in film, sheet, and fabric form. Laser plastic welding a business unit with many years of experience in the laser welding of plastics. Pdf laser transmission welding of semicrystalline thermoplastics. Laser welding utilizes a laser beam as a concentrated heat source to join multiple pieces together.
Infrared laser welding of overlapped thermoplastics utilizes radiation penetration heating. Because of different pigment additions today plastics. However, there is also a variety of other additives, including colorings, that are ir absorbent. All plastics with the same chemical properties can be welded. Ramesh singh laser welding basics laser welding is a noncontact process that requires access to the weld zone from one side of the parts being welded the weld is formed as the intense laser. View enhanced pdf access article on wiley online library html view download pdf. Laser plastic welding is a method of bonding two or more thermoplastic components together. Laser power laser wavelength in microfluidics applications.
In this paper, laser weldability of neutral polypropylene has been investigated using fibre and carbon dioxide lasers. The process control is carried out via an automatic clamping pressure controller and the waytime monitoring of the whole welding process. Laser radiation is shot through an upper transmissive plastic part. A design of experiment doe was conducted in order to establish the influence of the main working parameters on the welding strength of the two types of laser.
The concept involves passing a focused laser beam through an upper, laser. Laser beam welding lbw is a welding technique used to join pieces of metal or thermoplastics through the use of a laser. Of the various available plastics welding methods, laser welding is best suited for making welds with dimensions less than 1 mm 0. American journal of mechanical and industrial engineering. Laser welding is also effective with some dissimilar material combinations. Butt joint structure for laser transmission welding of nylon. Although laser welding has a short history in comparison with resistance spot welding and arc welding, accompanying the spread of high power co2 lasers in the 1990s, laser welding became widely applied to welding.
More laser compatible materials and additives are being developed, and the possibilities are expanding quickly. You are welcome to try out the following laser applications at the center. Laser welding in an innovative joining technique for plastics and offer advantages that cannot be achieved with any other process at this time. At the heart of the lpkf lqvario mf lies a precise fibre laser for creating ultrafine welding seams lines. The laser is also used to perform turning as well as milling. Research and development teams at material suppliers and universities worldwide have been actively advancing the frontier of plastic laser welding. Quality control laser plastic welding, impossibly consistent.
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