Laser Welding

Welding is a method of joining two or more pieces of metal together using various techniques such as spot welding and arc-welding. Laser beam welding is another of these techniques and uses high powered lasers to join multiple pieces of metal together.

The use of a laser beam has many advantages such as narrow and deep welds due to its concentrated heat source. In the automotive industry laser beam welding is quite frequently used for it fast and high volume applications.

Laser beam welding allows high power density which results in localised heat affected zones and this then allows high heating and cooling rates. The size of the laser spot can be between 0.2mm and 13mm, however only the smaller sizes are used for welding applications.

The depth of penetration depends on the focal point of the laser and is proportional to the amount of power being supplied. If the focal point is just below the surface of the workpiece then penetration is maximised.

With laser welding a pulsed or continuous laser beam is used, and this will depend upon the application. To produce deep welds a continuous laser is used but on thinner materials such as very thin sheet metals a pulsed laser using pulses only milliseconds long are employed.

There are two types of lasers which are commonly in use and these are gas lasers and solid state lasers. The first type uses mixtures of gases such as nitrogen, helium and carbon dioxide as a medium, whilst solid state lasers use solid medias such as chromium in aluminium oxide, synthetic ruby, neodymium in glass, and the most common type used is crystal which is composed of yttrium aluminium garnet doped with neodymium. When the mediums of either type of laser is excited, they emit photons and form a laser beam.

With a gas laser the lasing medium is produced by using high voltage and low current power sources to excite the mixture, and these lasers can operate in both pulsed and continuous mode. The power requirements for gas lasers are generally much higher than solid state lasers, and can reach 25kW.

Solid state lasers have wavelengths much shorter than gas lasers, and operators need to protect their eyes with special goggles or specially designed screens to prevent damage to the retina within the eyes. To deliver the laser beam to the required weld area, fibre optics are usually employed.

Another type of laser is the fibre laser and the gain medium is the optical fibre itself. They are used for robotic industrial welding and are capable of up to 50kW.

Laser Welding can have many applications and is very widely used in the automotive industry.

If you are in need of this service check out our product pages, they contain many companies that specialise in this. John Cheesman writes about Laser Welding. Visit the Businessmagnet product page for details and suppliers of Laser Welding.

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Precision Laser Welding Service - Is it Available?

Laser processing encompassing laser welding, laser cutting, laser drilling and laser system integration is the most advanced manufacturing technology that is rapidly gaining popularity. Be it in any industry, military, medical, aerospace engineering, automotive, space propulsion or hi-tech manufacturing, processing by laser beams have immense benefits and is the best solution to organizational needs and manufacturing equipments as precision laser cutting leads to accuracy and perfection.

Laser welding is used in delicate surgeries as well as in processing industrial materials. Such is the diverse nature of benefit of laser welding. It is the intense beam of concentrated heat source that is directed to melt, as well as heat or even vaporize selected area of any type of material. Laser welding is the most modern technique of welding and it leads to no distortion of material. Laser welding is an excellent tool for welding any kind of materials.

Laser welding is always preferred to conventional welding as it has a small HAZ (heat affected zone), deep penetration with excellent precision, consistent joints with minimal distortion due to heating, no secondary processing, faster weld rates and high repeatability. The choice of laser for welding depends primarily on the thickness of the material, its type and also penetration requirement. There exist two main types of beam delivery options used in case of laser welding such as through fiber optic cable and conventional beam delivery.

Again, precision laser cuttings are the more popular and effective than the traditional cutting process. The reason is obvious. It is accuracy that holds the key to success of precision laser cutting. In the manufacturing industry quality and accuracy are very important aspect; precision laser cutting is an excellent tool. The benefit of laser cutting is far too many. It is not only flexible and fast but it is a cost-effective mechanism as well. Again in precision laser cutting the material does not come into contact with the cutting tool while in the traditional method of cutting the material has a physical contact with the cutting tool.

This physical contact may lead to contamination or distortion of the material and the cutting tool may even get distorted or break down while cutting. Precision laser cutting does not lead to such issues. Additionally traditional cutting cannot be used in all types of materials, but precision laser cutting is used for any material with any kind of thickness.

Besides these other laser services include alternative to conventional drilling system that is laser drilling that provides with accurate holes with maximum precision and is very fast too. If you do not compromise on quality, then laser processing suitably tailored to industry requirement is the solution of the manufacturing industries in the long run.

Laser welding in no mean job and for low- and high-powered laser processing and for laser materials processing service and contract manufacturing services you should never settle for less only look for services offered at http://www.arcorlaser.com/

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Laser Machine Welding

Laser machine welding is the joining of two pieces of material, usually metal, but often these days plastics, using a laser beam. A laser is a single phase, or coherent beam of light often seen in science fiction movies, but the development of the laser beam and its application in laser machine welding allows for advancements in precision welding using this high-energy device, which creates heat when it strikes a surface. Laser machine welding is used for steam tracing and inspection, for surface heat treating, cutting with heat and other precision applications.

The laser, which stands for light amphlication by stimulated emission of radiation, emits photons in a narrow beam. Laser light usually in monochromatic, meaning that it emits light of a single wavelength. Common light emits incoherent light, which goes in all directions over the spectrum. The first working laser was developed by Hughes labs in 1960, but was descended from work done by Albert Einstein in 1916. However, the laser itself is such a recent development that the use of laser machine welding is a fairly recent technological innovation.

Lasers have found applications in many areas since their invention. Modern medicine utilizes lasers for surgery, having realized the ability to perform less invasive surgical procedures than in the past. Also the fine and precise nature of lasers has led surgeons to use them for such delicate operations as eye surgery. In common practice many people today use laser pointers, especially in the classroom. Marksmen use laser sights on rifles. Computer users use laser printers for output rather than old-fashioned methods, and lasers are used for motion detection and security, among many dozens if not hundreds of other applications. Lasers are even used in children's toys, office photocopiers and in the devices used to lock and unlock car doors. As technology improved lasers worked their way into all aspects of life and it was only natural that applications of lasers to welding technology would occur. The end result of this has been the creation of the laser machine-welding specialty, taking its place next to Mig, Tig, Arc and other welding methods.

Uses of laser machine welding are becoming commonplace in the computer and consumer electronics industry, in space and aircraft technology and with defense contractors. Laser machine welding is often used because it can be much more precise than other welding methods. Laser machine welding is often used for micro welds of hyper small dimensions that conventional welding methods could never touch. Laser machine welding is often used in jewelry manufacturing, engraving, in dentistry, and in the tool and die industry where precision is demanded. Laser machine welding is on the cutting edge of technology, and welders trained to use laser machine welding are some of the brightest and most talented welders in the industry.

Laser machine welding has also found a home in the highly technical and precise welding needs of plastic welding. While plastic welding is often done with ultrasonic welders, many times laser machine welding is the preferred method.

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