Laser welding has been widely used in the automotive, aerospace, mining and tunneling industries and plays an important role in military defense, surveying, marine navigation, agriculture, and transportation sectors. It is primarily used to join a variety of materials and components, usually metals.
In the automotive industry for example, high-power lasers are used to weld many components such as transmissions, mufflers, catalytic converters, exhaust systems, and tailor-welded blanks. Given that it’s considered as an indispensable tool in so many industries, many people are still baffled: how does a concentrated beam of light cut through and piece together the toughest materials on the planet?
Laser Beam Welding 101
As mentioned, laser beam welding is a technique used to join multiple pieces of metal using a laser. The concentrated heat source emitted by the beam allows for narrow, deep welds and high welding rates.
To achieve this, special lenses or curved mirrors focus the beam on a single pinpoint. This creates an extreme heat density wherever the laser beam is focused. Remember those science experiments with a magnifying glass and leaf on television? It’s the same thing with welding; only there’s a 6k watt of energy being channeled to a single spot. The focused laser beam penetrates the work piece and forms a cavity called a ‘keyhole’, which is filled with metal vapor or ionized metal vapor. This expanding vapor contributes to the prevention of the collapse of the molten walls of the keyhole into this cavity.
Dual Beam Lasers
Dual beam lasers from providers like lasertoolsco.com are a variation of laser tools used for welding and cutting purposes. Instead of having one beam, a single beam is divided into two equal-power beams. The dual beams work in tandem, with one ray following another during welding. The results are delayed humping onsets, slowed cooling rates, and improved fitups tolerance.
Experimental studies and welding research also suggest that utilizing dual beam lasers significantly improves overall welding quality, reduces surface defects, and cracking susceptibility.
Whether it’s a single beam concentrated on one spot, or one large beam split into two equally powerful rays, laser beams have become a staple in heavy welding and cutting. Evidently, they have become the precision cutting tools of choice.