Straight and safe strip guidance through the finishing mill, especially for head and tail
During the hot rolling of steel strip interferences can occur when transporting the strip from one mill stand to the next mill stand. Such interferences may hinder the straight-line of the strip and produce a deviation from the centerline which cause ripped tails or even cobbles. The X-Pact® Centerline Control increases the rolling stability, reduces the number of unplanned roll changes and supports operator by suitable visualization.
The system consists of the X-Pact® Sense hotCam and the X-Pact® ProBAS automation system. The resulting proved technology measures the width of the strip and detects the position of the strip edges between the mill stands in the hot finishing mill. The system uses a closed-loop algorithm to calculate the strip center line deviation and provides a levelling correction signal for the mill stands. For the different rolling sequences (head, filet, tail end) different control methods are used. Smooth transition between the control actions in the different phases is ensured. The X-Pact® Sense hotCAM itself is designed against harsh environmental conditions like high strip temperature, fog, steam, dust and vibrations.
Customer challenges addressed
- Straight and safe strip guidance through the finishing mill, especially for head and tail
- Determination of various measurement values of hot strip material in the hot finishing mill
- Calculation of center line deviation and providing a levelling correction signal for the mill stands