Laser Welding Equipment

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Laser Welding Machine Manufacturer And Supplier
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Welding is a method of joining two or more pieces
of metal together using various techniques such
as spot welding and arc-welding. Laser welding is
another of these techniques and uses high powered
lasers to join multiple pieces of metal together.
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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.
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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.
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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.
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To produce deep welds a continuous laser welding
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.
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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.
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When the mediums of either type of laser welding
are excited, they emit photons and form a laser
beam welding. 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.
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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.
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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 welding and are capable of up to
50kW. Laser Welding can have many applications
and is very widely used in the automotive
industry.
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Welding Machine Please Come And Visit Us Today
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Signvec International Pte Ltd Contact Us 10,
Ubi Crescent 05-35, Lobby C, UBI
Techpark, Singapore 408564 Tel (65) 6749
7337 Tel [phone] Email
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