Example: Profile measurement
Rail sections are typically measured with templates to find out
if they satisfy the customer's demands. A number of characteristic
and quality relevant properties must be recorded, such as
rail height, rail foot, rail web, rail head, rail shoulder etc.
The geometrical testing parameters are fixed in German, European and
international standards. The permissible profile deviations are in the
range of 0.1 mm. Using conventional mechanical templates, which are
available as reference templates and ±templates, only
selected segments of the rail can be inspected by hand.
Proceeding in this way, it is not possible to collect
information concerning the dimensional compliance along the
entire length of the rail. It is the goal to automatically
record the profile data for the final inspection over the entire length
of the rails, and to do so while the rail os passing
on the roller table. These measured data can be used for the
improvement of the production process as well as for documentation purposes.
During the automatic inspection, the measurement data are
evaluated in such a way that the measurement procedure of the template
inspection copied, in order to assure the correspondence
of the results and their conformity with standards.
Other applications
In addition to meausring rail profiles, arcus-rail systems
can also be used to measure other rail characteristics,
such as straighness of rails or straightness of end-sections
of rails.
|
Technical data (Example profile measurement)
| Property |
Value |
| Drives |
Servo motors |
| Sensors |
10 laser light section sensors of tye Taglio 130x105/272 |
| Measuring frequency |
200 Hz |
| Speed of rail during measurement |
1,5 m/s |
| Width of measuring unit in direction of transport |
1 m |
| Types of rails |
railway, tramway, crane (different profile for each type) |
| Switching between different types of rails |
automatically |
| Temperature of the rails during measurement |
0-80°C |
| Temperature compensation |
Calculation of the results to represent the values of the rail at a reference temperature of 20°C |
| Inspection result |
simulation of a handheld gauge, conforming with apropriate standards |
| Adjustment/Calibration |
outside the roller table, automatic process |
| Measuring precision |
50 μm |
| Articles and Brochures |
Download |
| Online laser measurement technology for rolled products (Ironmaking and Steelmaking 2008) |
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