We have a complete line of
High Power Detectors for
measuring multi-k W lasers.
We offer regular detectors,
available off the shelf, with
models up to 30 k W and
up to 100 k W, designed for
Square, round or even
rectangular apertures are
possible and sky’s the limit
in terms of maximum power!
HP & Super HP Detectors
Up to 100 kW
Reinventing the gear?
Laser technology can help
KINGSTON, ON, CANADA – In terms of innovation, automotive technology never stands still. For those looking to reinvent the gear (or
at least manufacture it more effciently), there are new, produc-tion-tested options ready to improve the process. A monitoring
and control technology produced by Laser Depth Dynamics is
giving industrial laser users unprecedented fexibility and conf-dence in how they record and control their welding processes—
and automotive powertrain applications are a highly active area
LDD’s measurement technology, Inline Coherent Imaging (ICI), is
the frst industrial solution for direct penetration depth measurements
in laser welding. ICI works by adding a second low-power laser beam
to the welding head, routed through the same focusing optics as the
process beam. This secondary beam is used to take high-accuracy
distance measurements hundreds of thousands of times per second.
The end result is the ability to resolve the very bottom of the keyhole,
as well as the surface of the welding workpiece, while the process
laser is on and welding. The system bears a number of advantages
for rotary welding applications commonly seen in production of powertrain components.
For setup and alignment on a round part, an ICI system can play
the role of an inline camera. However, the 3D resolution and immunity to ambient lighting conditions empower system users to pinpoint
the desired welding path, focus height, and part apex with precision
on the order of 10µm. All three aspects of this initial alignment are
critical to a repeatable process when welding around the outside of
a circular part (FIGURE).
ICI reports direct measurements of the keyhole depth over the
entire length of the weld. This technology also offers multi-factor
monitoring, made possible by actively pointing the measurement
beam to different sites on the part during the weld. This allows a
single system to measure seam position, distance from the head to
the workpiece, and the profle of the fnished weld bead, all during
a single welding pass. This monitoring scheme looks for welding
defects and their root causes immediately before, during, and after
the passage of the process beam within the region visible through
the welding optics.
For rotary welding, the combination of seam position and head/
workpiece offset measurements detects workpiece wobble during
welding, whether it is because of fxturing error, a failed press ft, out-of-round parts, or in some cases deformation caused by the weld
itself. Seam position monitoring can be used to ensure butt welds are
on target, or to check lap weld position by tracking a nearby edge. ICI
is an effective solution for fber, disk, direct-diode, and CO2 laser welding processes, and is compatible with many wire-feed applications.
The keyhole depth measurement results are comparable to those
obtained from cut and etch, but they cover the entire circumference
of the part, corresponding to cut geometries that would be either
extremely diffcult or effectively impossible to produce in the metallurgy lab.