Description

A dividing measuring location is used to map division cuts, scrap or sample sheet cuts.

Typical applications

  • Hot rolling mills

  • Inspection lines

Example for cropping shear in hot rolling mill (actual data):

The following figure shows the associated signal progression for length (top) and tracking IDs (bottom) for two scrap cuts at the beginning and end of the product.
Measuring location properties

Name and Enable as for standard measuring location

Entry/Exit tracking ID

For the Entry tracking ID and Exit tracking ID, the material tracking system has to supply two different analog signals, which are then selected in the measuring location properties. Controlling the Entry tracking ID and Exit tracking ID enables two modes to be differentiated.

Scrap cut mode (material exits the line with no further processing)

If the Exit tracking ID is equal to zero and the Entry tracking ID is not equal to zero, this corresponds to a scrap cut. This means that the cut material at this measuring location is removed from production and undergoes no further processing.

Division cut mode (material remains in the line)

A cut should change the Exit tracking ID, so that the cut material receives a new ID. The Entry tracking ID remains unchanged.

The “tracked parts” resulting from the cut then pass through the remaining measuring locations after the dividing measuring location. When the product file for each of these new products is generated at the end, ibaQDR takes each corresponding section of the original “tracked part” at the dividing measuring location and adds the data from all preceding measuring locations.

When a product file is generated at the end, ibaQDR identifies the scrap sections and only takes into account the section of the “tracked part” remaining in the line.

Length

There is only one length signal as no elongation of the material takes place at a dividing measuring location. In contrast to a standard measuring location, the length signal corresponds to the entry length, which means that it has to be reset to zero with every cut.
Example (theoretical)

The following figure shows the time-based graphs for four measuring locations. The first two measuring locations are standard measuring locations, the third is a dividing measuring location and the fourth is a standard measuring location again.

Before the dividing measuring location, the tracked part has a length of 60 m (measured length value = red curve).

At the dividing measuring location, a division cut is made every 12 m. Each cut increments the Exit tracking ID. This produces five new tracked parts, each with a length of 12 m. These can be seen at the last measuring location, which they pass through in turn after the dividing measuring location.