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Laser welding is a contact-less joining process in which a
laser beam is used to create a fusion weld in metals. To create these welds,
the laser beam is tightly focused onto the metal parts. The very high energy
density in the laser focus melts the metals, which solidify once the laser
pulse is terminated. |
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The laser welding process has a
number of important benefits: |
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Contact-less so it is possible to weld in
inaccessible places |
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No or minimal part deformation
or electrode contamination |
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High speed (up to 500 welds per second) |
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Small heat affected zone as the
spots are small and the laser pulses short (1ms - 50 ms) |
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Possibility to make very small
welds (0.05) mm diameter in thin materialsl |
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For precision laser spot and seam welding powerful pulsed Nd: YAG lasers are
used. In this type of laser a flash lamp provides the energy to create a lasing
action in a Neodimium doped YAG crystal. The generated laser pulses have a high
peak power in the range of 0.5 to 8 kW, needed in the welding process.
Our advanced laser welders use a fast closed loop control in which the produced
laser output is measured and compared to the programmed pulse shape. Any
deviations are automatically corrected within every single laser pulse,
resulting in superior weld reproducibility.
Pulsed Nd: YAG laser welders use optical fibres to transmit the laser beam to
the workpiece. One laser source can be divided into multiple fibres to support
several machines, or make simultaneous welds. The latter is needed in special
applications like fibre attachment in the telecom industry where the weld
shrinkage is cancelled out by the multiple beams.
The combination of fibre diameter, focusing optics used and laser parameters
determine the shape of the weld. Finding the optimum laser settings is a job
for laser engineers in our application labs. |
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Pulsed laser spot and seam welding applications. |
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A-Series Laser Welders
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Our extensive laser welding product range consists of more than
10 different pulsed Nd: YAG lasers which address different applications ranging
from micro spot welding to high speed aluminum seam welding.
Some of the characteristics of our welder product line:
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Unique closed loop power feedback system for optimum stability
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Advanced pulse shaping
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Special seam weld mode
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Up to 6 fiber outputs
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Very reliable with large install base
Air-Cooled Laser Welders, LW5A,
LW15A, LW25A
The Air-cooled laser welders are designed for spot welding
and low volume seam welding applications. The LW5A is especially geared towards
welding thin wires, foils using small spot sizes around 200 micron. With a
maximum peak power of 1 kW this laser is extremely stable in low energy
applications.
The air-cooled welders work on 220-240V single phase 50/60 Hz electrical power.
The lasers feature an integrated water to air heat exchanger, so no external
cooling water is required.
Medium Power Water Cooled Laser
Welders, LW50AE, LW70AE, LW150AE
The medium power laser welders are all water cooled and work
on 480V three-phase power. They are used in a multitude of applications ranging
from seam welding medical implants to spot welding large mechanical parts.
High Power Water Cooled Laser
Welders, LW300AE, LW400AE, LW500AE, LW600AE
The high power laser welders are all water cooled and
require a 400V 3-phase power connection. They are typically used for high speed
spot welding and seam welding of reflective materials such as aluminum and
copper.
The LW500AE and LW600AE are the first of our laser welders which feature a
color touch screen panel on the laser to make programming these lasers easier
than ever before.
Laser
Specifications
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