DECOILING OF A COILED STRIP

Abstract

An unwinding device (1) for unwinding a strip (5) which had been wound to form a coil (3), in order for the unwound strip (5) to be hot-rolled. The unwinding device (1) has at least two bottom rollers (7) for supporting the coil (3) on the lower side of the coil, a detaching mechanism (9) for detaching a strip end (11) from the coil (3) on an unwinding side of the coil, and a downholder roller (13), (14) which is disposed at the coil (3) such that the downholder roller (13), (14) stabilizes the position of the coil (3) when the strip end (11) is being detached.

Claims

1.-4. (canceled)

5. A method for unwinding a strip which had been wound to form a coil, the method comprising: supporting the coil on the lower side below the coil by at least two bottom rollers; detaching a strip end from the coil on an unwinding side of the coil by a strip-end detaching mechanism; and disposing a downholder roller at a fixed spacing from an external surface of the coil in a manner to stabilize the position of the coil when the strip end is being detached.

6. The method as claimed in claim 5, further comprising disposing the downholder roller at an upper side of the coil.

7. The method as claimed in claim 5, further comprising disposing the downholder roller at the unwinding side on the coil.

8. The method as claimed in claim 5, further comprising disposing respective longitudinal axes of the downholder roller and of the bottom rollers to be mutually parallel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The single FIGURE schematically shows a side view of an unwinding device for unwinding a strip which has been wound to form a coil, in order for the strip to be hot-rolled.

DESCRIPTION OF AN EMBODIMENT

[0020] The unwinding device 1 comprises two bottom rollers 7 for supporting the coil 3 on the lower side, a strip-end detaching mechanism 9 for detaching a strip end 11 from the coil 3 on an unwinding side, and a downholder roller 13 which is disposed on the coil 3 in such a manner that the downholder roller 13 stabilizes the position of the coil 3 when the strip end 11 is being detached.

[0021] In the exemplary embodiment which is illustrated in the FIGURE, a downholder roller 13 may be disposed at an upper side of the coil, so as to be at a fixed spacing from an external surface of the coil. Alternatively, a downholder roller 14 may be disposed at the unwinding side 15 of the coil 3, as shown in broken line. The downholder roller 13 or 14 is normally out of contact with the coil and contacts the coil when the strip end is detached, so that the downholder roller serves as a mechanical stop for the coil.

[0022] The longitudinal axes of the downholder roller 13, 14 and of the bottom rollers 7 are disposed so as to be mutually parallel. The strip-end detaching mechanism 9 is configured as a pivotable arm. Mountings of the downholder roller 13, 14 in the gap between the coil and the strip-end detaching mechanism 9 are not illustrated. The downholder roller is held at a fixed spacing from the external surface of the coil.

[0023] Furthermore, there are transfer rollers 15 and two drive rollers 17 for conveying the unwound strip 5. The drive rollers 17 are disposed on top of one another. The strip 5 is guided by way of the transfer rollers 15 to the drive rollers 17 and is pulled through between the drive rollers 17.

[0024] While the invention has been illustrated and described in more detail by way of preferred exemplary embodiments, the invention is not limited by the disclosed examples, and other variations may be derived therefrom by a person skilled in the art without departing from the scope of the invention.

LIST OF REFERENCE SIGNS

[0025] 1 Unwinding device

[0026] 3 Coil

[0027] 5 Strip

[0028] 7 Bottom roller

[0029] 9 Strip-end detaching mechanism

[0030] 11 Strip end

[0031] 13 Downholder roller

[0032] 15 Transfer roller

[0033] 17 Drive roller