Method for preventing shape changes in metal coils, in particualr for preventing a collapsing of newly wound hot coils
AssigneePrimetals Technologies Austria GmbH
InventorsRoland Hofer, Lukas Pichler, Christoph Salzmann, Alois Seilinger, Olaf Silbermann
Life of this patent
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Abstract
The invention relates to a method for preventing shape changes in metal coils, in particular for preventing a collapsing of newly wound hot coils. In the method, a metal coil, in particular a newly wound hot coil, is rotated about its longitudinal axis intermittently in a first rotational direction and then rotated back in a second opposing rotational direction, or further rotated in the first rotational direction.
Claims20
A method for preventing shape changes in metal coils, comprising:
- intermittently first and second rotating a metal coil about a longitudinal axis of the metal coil, wherein the first rotating is forward in a first direction of rotation around a first angle of rotation;
- and
- wherein the second rotating is subsequent to the first rotating, in a second direction one of opposite the first direction around a second angle of rotation, and further in the first direction around a third angle of rotation;
- wherein the first direction is counter to a coiling direction of the metal coil;
- wherein the first rotating and the second rotating are performed so that the metal coil is not rotated beyond a coil start on an outer circumference of the metal coil;
- wherein the first angle of rotation is between 22.5° and 135°;
- and
- wherein there is a rest interval between the first rotating and the second rotating.
A transport system for preventing shape changes in metal coils, comprising:
- a transport device with a coil support having at least a first rotatable and a second rotatable transport roller;
- and
- at least one external drive unit, configured to be coupled mechanically to one of the rotatable transport rollers in order to drive said transport roller;
- wherein the system is configured to intermittently first and second rotate a metal coil in a first rotation and in a second rotation about a longitudinal axis of the metal coil, wherein the first rotation is forward in a first direction of rotation around a first angle of rotation;
- and
- wherein the second rotation is subsequent to the first rotation, in a second direction one of opposite the first direction around a second angle of rotation, and further in the first direction around a third angle of rotation;
- wherein the first direction is counter to a coiling direction of the metal coil;
- wherein the first rotation and the second rotation are performed so that the metal coil is not rotated beyond a coil start on an outer circumference of the metal coil;
- and
- wherein there is a rest interval between the first rotation and the second rotation.
A transport system for preventing shape changes in metal coils, comprising:
- a transport device with a coil support having at least a first rotatable and a second rotatable transport roller;
- at least one drive unit configured to drive said transport roller;
- and
- a controller coupled to the transport device and the at least one drive unit, the controller configured to intermittently first and second rotate a metal coil in a first rotation and in a second rotation about a longitudinal axis of the metal coil, the first rotation being forward in a first direction of rotation around a first angle of rotation, the second rotation being subsequent to the first rotation and in a second direction one of:
- opposite the first direction around a second angle of rotation, and
- further in the first direction around a third angle of rotation;
- wherein the first direction is counter to a coiling direction of the metal coil;
- wherein the first rotation and the second rotation are performed so that the metal coil is not rotated beyond a coil start on an outer circumference of the metal coil;
- and
- wherein there is a rest interval between the first rotation and the second rotation.
Dependencies are inferred from the claim text.