RLH-A | Remote Laser Hardening - Adaptive
DESCRIPTION OF FUNCTION
A 1-D scanner based on the scapacs® optic building blocks architecture, with integrated highly dynamic
temperature control – the RLH-A is capable of hardening extremely demanding components.
RLH-A: Complete view (shown here without cross-jet and process-jet)
THE ADVANTAGES
• Enables complex and variable components to be hardened for power trains or heat treatment
shops.
• Variable process parameters: track mid-point; track width left and right; pre-heating and hardening
temperatures and power; de-focussing; and the emissions coefficient. Parameters can also be
changed during the process.
• Reliable hardening and consistent quality: made possible by the highly dynamic temperature
control mechanism via the variable scanner-mirror speed and by the subsidiary slow laser power
controls (based on Patent EP 08 022 027 B2).
• Set-up time is significantly reduced and processes are easier to adapt – the optional auto-focus
module allows the spot diameter to vary without requiring a change to the operating clearance.
• By using scapacs® components, the optical system can be optimally adapted to the laser source
and the process parameters (fibre diameter, laser source, required power distribution).
• Optionally, a monitoring camera can be integrated into the system.
• Optionally available with external line projector so that operating clearance can be optimally set.
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ILLUSTRATION OF THE RLH-A MODULES
Monitoring
camera
Fibre coupling,
Trumpf type D
Interface box
Optional
line projector
RLH-A: side view
Collimator with
auto-focus
module
Monitoring camera
Tool coupling
Line scanner
Cooled
protective
shield
Fibre coupling,
Trumpf type D
Line scanner
Focusing module
Cover glass
drawer
Tool coupling
Cross jet
Cooled protective
shield
RLH-A: rear view
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Interface box
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Optional
line projector
RLH-A: top view
Pyrometer
Interface box
Tool coupling
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THE FUNCTIONS OF THE INDIVIDUAL
MODULES
scapacs® building blocks
• Based on a constantly growing collection of optical and mechanical
parts.
Variable fibre coupling
• Trumpf-D
• Trumpf-B
• Optoskand QBH
• Optoskand MMI
Collimation
• Fixed collimation or with integrated auto-focus module.
• The auto-focus module allows the focus diameter to be modified
based on the process. The stand-off clearance to the component
does not need to be adjusted.
• An additional cover glass below the fibre ends – no contaminant
particles penetrate while the fibre is being changed.
Pyrometer
• Integrated camera-based pyrometer.
• Path of measurement beam from pyrometer is coaxial with the path
of the laser beam.
• Thus the scanner also moves the pyrometer's measurement field.
• The measurement distance from the pyrometer to the laser focus is
constant so it can be set optimally.
• An error in the scanner positioning does not affect the
measurement result.
• Temperature fields can be selected using software functions. No
mechanical adjustment to the sensors is required.
Monitoring camera
• Integrated coaxial-aligned monitoring camera – camera observation
is independent of the position of the scanner mirror.
• Thus the component remains still for the observer (this is not the
case for the pyrometer camera).
• It is easy and safe to visually verify the position of the hardening
track over the camera.
• Thus the initial commissioning process is faster and less prone to
errors.
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Scanner unit
• Highly dynamic scanner unit.
• Linear projection (one-dimensional).
• Variable programming options for the scanned line.
• External cooling for the entire optics and galvos (not including the
fibre coupling). This does not prevent the penetration of cooling
water into the optical system.
Flange mounting on the robot
• Can be quickly swapped out with high-precision tool coupling
• Measurement for the optics, just as for all scapacs® devices, is
enabled at the appropriate measuring stations.
Cover glass drawer
• Dust-proof drawer for cover glass.
• Additional protective glass between the lens and the cover glass
drawer: offers additional protection for the focusing lens.
• Efficient cross-jet module (not shown here).
• Process jet uses nozzle from Silvent (not shown here) in order to
prevent water vapour from the quenching bath from reaching the
optics.
Controller (not shown here)
• Modern, bus-based control design.
• Actuators and sensors are bus nodes.
• The controller is the bus master and is separated from the RLH
head.
• Controller can be installed as needed (for example, in the facility's
equipment cabinet).
• The RLH system can communicate with the production facility on a
selection of Fieldbus variants, such as Interbus, Profibus, Devicenet
or Profinet.
• A facility PC can be used for parameterization. The PC can also be
used for operating the laser power unit or the facility PLC.
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