Device for setting a brush onto a roll
The invention relates to a device for placing a brush ( 1 ) against rollers ( 2 ), for example in roll stands, in particular against the working and/or support roller of a roll stand for the hot rolling of aluminium, wherein the brush ( 1 ) is mounted on a pivot lever and can be placed in contact against the roller ( 2 ) by means of a placement device ( 3 ) which exerts a placement force. It is provided here according to the invention that the placement device ( 3 ) for the brush ( 1 ) comprises at least one adjusting element ( 5 ) which is arranged so as to be rotatable with respect to the pivot lever ( 12 ) and which is operatively connected to the pivot lever by means of a force transmission element ( 4 ). A regulating circuit ( 6 ) is designed to regulate the placement force to be constant, proceeding from a nominal force F 0 , in such a way that, by means of a monitoring device ( 7 ) for the rotational angle of the adjusting element ( 5 ) with respect to the pivot lever, the placement force can be regulated to be constant by means of at least one actuating element ( 8 ).
1. A device for setting a brush ( 1 ) on to a roll ( 2 ) for shaping or guiding strip material, for example in rolling stands or strip guiding devices, comprising:
a pivoting lever ( 12 ), on whose one end the brush ( 1 ) is mounted such that it can rotate and is preferably parallel to the roll ( 2 ), and on whose other end the pivoting lever ( 12 ) is mounted such that it can rotate about a pivot axis ( 10 ); and
a setting device ( 3 ) for setting the brush ( 1 ) against the roll ( 2 ) with a setting force,
characterized in that
the setting device ( 3 ) for the brush ( 1 ) comprises at least one adjusting element ( 5 ) that is arranged such that it can rotate in relation to the pivoting lever ( 12 ), and a force transmission element ( 4 ) for forming an operative connection between the pivoting lever ( 12 ) and the adjusting element ( 5 );
a monitoring device ( 7 ) is provided to monitor the angel of rotation of the adjusting element ( 5 ) in relation to the pivoting lever ( 12 ); and
a control loop ( 6 ) is provided in order to keep the setting force of the brush ( 1 ) against the roll ( 2 ) constant to a predefined intended force F 0 by readjusting and keeping constant the angle of rotation monitored by the monitoring device ( 7 ), via at least one actuating element ( 8 ).
2. The device as claimed in claim 1 , characterized in that the force transmission element ( 4 ) between the adjusting element ( 5 ) and the pivoting lever ( 12 ) is formed as a compression spring ( 9 ).
3. The device as claimed in claim 1 , characterized in that the adjusting element ( 5 ), which is arranged such that it can rotate in relation to the brush ( 1 ), is constructed as an adjusting lever ( 11 ).
4. The device as claimed in claim 1 , characterized in that the adjusting element ( 5 ) is mounted such that it can rotate about the pivot axis ( 10 ).
5. The device as claimed in claim 1 , characterized in that the actuating element ( 8 ) for the constant regulation of the setting force is formed as a hydraulic cylinder ( 13 ).
6. The device as claimed in claim 5 , characterized in that the actuating element ( 8 ) for the constant regulation of the setting force is formed as a hydraulic cylinder ( 13 ) acting on the adjusting lever ( 11 ).
7. The device as claimed in claim 1 , characterized in that the monitoring device ( 7 ) for the angle of rotation is formed as a rotary encoder ( 14 ).
8. The device as claimed in claim 1 , characterized in that the predefinition for the intended force F 0 for the control loop ( 6 ) is formed as a function of the brush type.
9. The device as claimed in claim 1 , characterized in that the predefinition for the intended force F 0 for the control loop ( 6 ) is formed as a function of the roll width.
10. The device as claimed in claim 1 , characterized in that the predefinition for the intended force F 0 for the control loop ( 6 ) is formed as a function of the roll material.
11. The device as claimed in claim 1 , characterized in that the predefinition for the intended force F 0 for the control loop ( 6 ) is formed as a function of the strip material.
12. The device as claimed in claim 1 , characterized in that the roll ( 2 ) and/or the brush ( 1 ) is designed to rotate.