US 8,082,056 B2Granted

Operation method for a looping pit with drag compensation

AssigneeSiemens Aktiengesellschaft

InventorBertram Schulze

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Abstract

A band is introduced into the pit entrance of a looping pit. This band is released from the looping pit at a pit exit. A segment of the band can thereby be buffered. The entrance-sided drag that exists in the band at the pit entrance is measured by an entrance-sided drag measuring device; the exit-sided drag that exists in the band at the pit exit is measured by an exit-sided drag measuring device. The values of the entrance-sided and exit-sided drags are passed to a control device. Depending on the entrance-sided and exit-sided drags, a control signal for at least one driven roller arranged between the pit entrance and exit is identified by the control device and is passed to the at least one driven roller. The band buffered in the looping pit is acted upon by the at least one driven roller according to the control signal.

Claims20

Dependent claims

An operating method for a looping pit by means of which a section of a strip can be buffered, comprising the steps of:

supplying the strip to the looping pit at a pit entrance and emitting the strip from the looping pit at a pit exit,
detecting entrance-side drag, which occurs in the strip at the pit entrance by means of an entrance-side drag measurement device, and detecting exit-side drag which occurs in the strip at the pit exit by means of an exit-side drag measurement device,
supplying the entrance-side drag and the exit-side drag to a control device,
comparing the entrance-side drag and the exit-side drag to calculate a drag difference between the entrance-side drag and the exit-side drag,
comparing the calculated drag difference to a nominal drag difference, and
determining a control signal by the control device for at least one driven roller, which is arranged between the pit entrance and the pit exit, as a function of the comparison of the calculated drag difference to the nominal drag difference, and emitting the control signal to the at least one driven roller,
wherein the at least one driven roller acts on the strip which is buffered in the looping pit, corresponding to the control signal.

4 more elements

Dependencies are inferred from the claim text.