Laser,Welding,Overview,Laser,W technology Laser Welding Overview
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Laser Welding is also called Laser Beam Welding and it is acommercial process and is used when you want to fuse together several pieces ofmetal. The way it works is that a laser beam is pointed to a joint and then thebeam is moved along that joint. The process will melt the metals into a liquid,fuse them together, and then make them solid again. This is generally a process that is used when you want alinear continuous seam or at times when you want spot welds in a certain area.There are basically two types of laser welding. Laser conduction weldingfocuses the beam on a specific area and relies on the conductivity of the metalit is melting to conduct the heat into the joint. As this happens, the materialbeing welded changes from solid to liquid, and then they turn back into solidand they are welded. In laser penetration welding, the laser beam is pointed intoa certain area and at a stack of material that needs to be melted all together.This single location creates a space for the beam to concentrate on thespecific needs of the metals to be melted. Some of this material will then vaporize and create a hole that is asthick as the material that was heated. After the heating andcooling down of the metal it is welded; this is similar to a spot lap joint.The two types of lasers that are used for this process are the GasLaser that uses a mixture ofseveral gases that can include helium, nitrogen or carbon dioxide for itsmedia, or a Solid State Laser that uses a solid media like a synthetic rubyaluminum oxide or gas. Both type so lasers can be used as continuous streams orpulsed modes of operation. The Laser Welding process is very versatile and it can beused on many different steels including carbon, HSLA, stainless, aluminum ortitanium. In some instances like the carbon steels, you will need to guardagainst cracking because of the cooling rates. This type of welding does gain ahigh quality weld and it can be a very fast process, depending on the thicknessof the piece you are working on. The automotive industry uses Laser welding for much of whatit does and the gas lasers are usually the most readily suitable for this typeof high volume. There are several advantages of laser welding. You can sendthe laser beam through the air rather than having to place it in a vacuum androbots can easily do this type of work. You can get a higher quality in yourwelds. There is also another hybrid type of laser welding that iscalled laser hybrid welding and it combines both laser beam and arc welding soyou get more flexible positions and welding speeds are higher, and undercuttingis reduced. A few of the advantages to laser welding arethat you can do deeper or more narrow welds than can be done with otherprocesses, you don't have to worry about distortions because they aren'tcreated with the laser.
Laser,Welding,Overview,Laser,W