Three-roll steering stand

In the case of high strip tensions and/or thick strip it is recommended that a strip guidance system with a three-roll steering stand type SRHT is used for correcting strip travel without deflection of the strip. Achieving a good steering effect necessitates sufficient adhesion between strip and rolls. The degree of adhesion is determined by the roll diameter and the depth of depression of the mid-roll.

The swivelling frame with the three rolls is guided by two steering levers so that a suitable relationship between the angle formed between the strip and the roll axis (I portion) and lateral displacement of the strip (P portion) is achieved. In addition to exactly positioning the outgoing strip, a centering effect is exerted on the strip in the entry area. The application shown here with a very short entry distance can only be realised in combination with an upstream strip guidance system: see description HQT-System.

The most stringent requirements concerning exact guidance of the strip are imposed upstream of trimming shears. On the one hand, the width of the edge to be cut off must be kept as small as possible, and on the other hand, there must be a defined minimum width to prevent the cut edge from tearing off. For exact sensing of the strip position, the high-precision inductive strip centre sensing system type BMIH as shown here or the HF alternating light measuring system type BMS, protected against external light, is recommended.