Gadiz welding Laser explain Mig welding Laser

One of the remarkable characteristics of laser welding is the narrow and deep
configuration of the weld. This narrow weld is the result of the high energy concentration of
the process and the high welding speed which result in a low heat input into the workpiece.
Several applications take advantage of this narrow weld characteristic and high speed
processing, but for a lot of other applications the laser process is too expensive and its narrow weld leads to some difficult metallurgical and fit-up problems. To avoid these problem

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In the late seventies at Imperial College in London a group lead by William
Steen performed the first attempts in combining a laser and an arc (TIG) welding process.
This new hybrid laser-arc welding immediately showed improved characteristics compared to
both the solo laser and the solo arc welding techniques as well as providing increased process
stability, a significantly higher welding speed and a deeper and narrower weld. However, this
innovation did not immediately find practical applications as the laser process itself was not
viable on an industrial scale

spg car shoe the laser welding

The predominant constituent of the shield gas is generally an inert gas such as
helium or argon. A shield gas providing a higher ionisation potential is required since the
plasma can deflect or absorb a portion of the laser energy when CO2 lasers are employed.
Helium is therefore often preferred to argon for laser welding, but its lightness is a
disadvantage and it is often combined with argon which is heavier without substantial
alteration of the weld penetration depth. The addition of reactive gases such as oxygen and
carbon dioxide has been shown to have an influence on the weld pool wetting characteristics
and bead smoothness.

Gadiz Mig welding

MIG welding is a welding process based on the creation of an electrical arc
between a welding torch (anode) and the workpiece (cathode), see figure 2. Heat is transferred
to the workpiece through a plasma. The intensity of the power input of this process is around
103 W/cm2 (significantly lower than for laser welding), which produces a weld of small depth
and medium width. The welding speed is also lower than the one provided by the laser
process and this can result in some distortion of the workpiece, which often needs to be
machined afterwards. But MIG welding is interesting from an industrial point of view because
it has a good bridging ability, the equipment costs are low compared to laser welding, and this
process is also very energy efficient (60 to 80 %).

Kumpulan Gadiz laser

The arc welding source uses a DC mode rather than an AC mode because the
energy input and density are higher in the first case. The arc source is often operated in a
pulsed mode since this has been shown to reduce the amount of spatter whilst maintaining a
deep penetration of the weld. The welding voltage has been shown not to greatly influence the
weld penetration depth, which is mostly dependant on the laser power, but the weld bead gets
wider if the welding voltage increases, giving a lower depth to width ratio for a same laser
power. The arc voltage (and wire feed rate) will therefore need to be increased for wider fit-up
gaps, to avoid any lack of fusion. The welding current is generally matched to the filler wire
diameter (higher welding current for higher wire diameter). Considering a given wire