Measurements of steel slab width and edge profile
The SlabProfiler 3D is a laser measurement system for in-line width and edge profile measurement of slabs in continuous casting plants. The SlabProfiler uses two LIMAB ProfiCura 2D laser profile sensors that capture the entire edge profile at a rate of 240 Hz. The slab width and edge shape are continuously measured and displayed both graphically and numerically on the operator screen. The SlabProfiler provides instant recognition of out of shape or dimensional problems of slabs and provides users with an invaluable tool for monitoring the casting process.
|Width range (typical)||Thickness range (typical)||Width accuracy||Slab temperature|
|600 – 2000 mm||40 – 320 mm||± 1 mm||0 – 1200 ºC|
The SlabProfiler system uses LIMAB’s ProfiCura 2D sensors which use the principle of 2D laser triangulation capturing the true profile at a rate of 240Hz. Two sensors are used one mounted either side of the slab which captures both edge shapes. The sampling of both lasers is synchronised so that the width can also be measured.
- Hot slab width and edge profile before the flame cutter in a continuous casting plant
- Hot slab width and edge profile after the flame cutter in a continuous casting plant
- Dimensional inspection of cold slab on entry to the reheat furnace in hot rolling mills
- Length measurement of hot or cold slabs (option)
- Camber of hot or cold slabs (option)
LIMAB laser technology
The SlabProfiler uses LIMAB’s standard ProfiCura 2D profile sensors which use the principle of 2D laser triangulation. These sensors are a product of almost 25 years experience of producing precision laser sensors. The Sensors are robust, rugged yet very accurate and are at the heart of the SlabProfiler system.
The ProfiCura 2D project a laser line on to the surface to be measured. This line is viewed with a high-resolution camera which captures the image an internal microprocessor within the sensor applies a calibration algorithm to converts the file into X, Y coordinate data. To measure the slab two sensors are used mounted either side of the slab at a safe distance of around 1 metre. The profile capture rate is 240 Hz per sensor. The scanning of both lasers is synchronised so that the slab width can be determined at various height positions.
Measures width and the edge profile
In addition to measuring the width of the slab, the true profile of both edges is also measured accurately providing invaluable feedbacks as to the overall performance of the caster. Poor edge shape can be a result of mould wear or cooling problems within the caster these are all highlighted at an early stage.
Forced air cooling
The SlabProfiler is delivered with a forced air cooling system that makes installation simple and reduces the running costs. In addition, the air is used to keep the optics clean eliminating regular maintenance.
With many installations worldwide the SlabProfiler system is simple to install and will immediately provide you with the benefits of accurate slab dimensional measurement.
Full slab geometry
The SlabProfiler system can be equipped optional lasers that in addition to the width and edge profile also measure the slab length and camber.
The software is designed for client/server mode with the possibility of several clients connecting to one server. The server software calculates and displays the edge profiles and displays them in a graphical view. Trend graphs show the width of the slab over time. Numerical values display key dimensions and slab temperature. All measured values are logged to a database for archiving and post-production analysis.
LIMAB provide a complete turn-key solution, one contractor takes full responsibility. The SlabProfiler system includes all hardware and software needed for any plant installation. LIMAB provide commissioning training and on-going product support and service.
|Rugged construction||Reliable use in any mill environment for either hot
or cold applications
|Side mounting||All equipment mounts to the side of the slab making
it easy to retrofit to existing lines.
|Proven System||Simple to
install and will immediately provide you with the benefits of accurate slab
|Forced air cooling||Simple installation
and reduces the running costs. Air is used to keep the optics clean
eliminating regular maintenance.
|Edge profile measurement||Proves
invaluable feedbacks as to the overall performance of the caster. Identifies
poor edge shape early which is a result of mould wear or cooling problems
within the caster.
|Edge thickness||Measures slab
edge thickness on both sides
|Length & Camber||Options to add length and camber to provide full
slab geometry information
|Constructed with standard ProfiCura 2D sensors||Spare parts readily available, ensuring very low
on-going cost and no high value spares inventory.
|Improved yield||Continuous process monitoring ensures more product
is produced to specification increasing process efficiency
|Turn-key solution||One contractor takes full responsibility for
|Slab width range (typical)||600 – 2500 mm|
|Slab length range (typical)||2000 – 18000 mm|
|Deviation from roller table centre line (typical)||± 100 mm|
|Slab temperature range||0 – 1200 ºC|
|Slab speed (typical)||1 – 60 m/min|
|ProfiCura 2D stand-off distance||900 mm|
|ProfiCura 2D measuring range||1000 mm|
|ProfiCura 2D maximum distance||1900 mm|
|Slab thickness||40 – 350 mm|
|Width measurement accuracy||±1 mm 2σ|
|Length measurement accuracy (option)||< ±0.05% of reading|
|Sensor profile rate||from 240 Hz|
|Camber accuracy (option)||±2 mm|