This section describes project planning using the example of a simplified hot-dip galvanizing line. The information also applies to other continuous processing lines, such as tin plating, chromium plating, plastic coating, annealing and pickling line, etc.
Key features
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Multiple line sections with different speeds (entry, processing, and exit sections)
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Multiple uncoilers and coilers possible
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A skin pass mill or stretch leveler are often included, where elongation of the material and thus a speed difference occurs.
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1:n, n:1 and n:m production possible.
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Multiple products in the line simultaneously
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Scrap cuts, sample cuts
Typical measured values
Thickness, width, layer thickness, temperatures, strip tension, skin pass level, oil quantity
ibaQDR
|
Property |
Remark |
|---|---|
|
Tracking ID |
With each welding operation |
|
Tracking start |
Length counting begins at completion of welding operation |
|
First measuring location |
Uncoiler |
|
“Finished” signal |
Division cut at the shear before coiler |
|
Length resolution |
1 m |
Typical measuring locations
|
Measuring location type |
Application / Special features |
|---|---|
|
Tracking start (default) |
Standard measuring location, which is provided and enabled by default. Normally corresponds to the welder. |
|
Tracking end (default) |
Standard measuring location, which is provided and enabled by default. Example: Exit shear |
|
Standard measuring location |
Distributed through the entire line, where material tracking delivers precise signals or length values. Use is essential at locations where material elongation occurs (entry length ≠ exit length) Example: Skin pass mill |
|
Measuring location with offset after MLx |
Distributed through the line, always with reference to an upstream standard measuring location. To be used wherever material tracking provides no signal or no length value. The exact distance (strip travel) to the standard measuring location must be known. Example: Shapemeter roll 3 m after skin pass mill |
|
Measuring location in front of the tracking start |
The exact distance (strip travel) to the tracking start measuring location must be known. Example: Thickness gauge before welder |
The following figure shows the data from the CGL simulator in ibaAnalyzer. The top graph shows the length signals from material tracking against time. In the following two graphs, signals from different parts of the line are shown standardized to the finished strip length, with the last graph showing the signal vector for a flatness measurement. These visualizations are particularly useful for signals from traversing measurement devices, e.g. layer thickness or oil coverage measurements.
