JP2000263107A - Device for regularly controlling frictional force between guide way and contact surface of roll chock guided in window of roll stand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make frictional force act on over the entire area of the pressing surface of a chock by changing pressing force to generate a constant frictional force without depending on rolling technical conditions each time with respect to a device for regularly controlling the frictional force between the guide way and contact surface of a roll chock guided in the window of a roll stand. SOLUTION: The guide ways FF1, FF2 are carried in the window SF. A carring plate PL which is flat and whose back can be pressed is arranged and guided vertically slidably to the guide ways FF1, FF2 of the window and chock or the contact surfaces AF1, AF2 in the window.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for regularly controlling a frictional force between a guide surface and a contact surface of a roll chock guided in a window of a roll stand.

[0002]

2. Description of the Prior Art Apparatus of this type dampen vibrations which occur frequently in the rolling of strips on a multi-roll stand, especially at high rolling speeds at the risk of causing various vibration problems. Help to do.
These vibrations cause various surface damage to the strip, such as so-called vibration flaws, and have a detrimental effect on the service life of the roll. If rolling at lower rolling speeds is necessary to avoid these oscillations, the result is higher cost and reduced rolling line productivity.

[0003] It has already been proposed to address these vibration problems by generating a frictional force between the guide surface of the window and the chock having a hollow body and the abutment surface, the hollow body being liquid. It could be stretched using pressure. This telescopic hollow body is mounted in the window of the roll stand and acts on the pressing surface of the chock. This hollow body will increase the frictional force between the window and the guide surface of the chock and the abutment surface, but the hollow body will only act spherically on the abutment surface of the chock and will be uniform. Has the disadvantage that it does not act over the entire surface. It is impossible or very difficult to change the pressing strength. It is impossible or very difficult to obtain constant pressing and frictional forces.

[0004]

The problem underlying the present invention is that a device of the same type has to be modified in order to generate a constant frictional force without depending on the respective rolling technical conditions. In order to allow the device to work over the entire pressing surface of the chock.

[0005]

SUMMARY OF THE INVENTION This object is achieved by providing, in a window, a flat, rear-pressable carrier plate carrying a guide surface in which a window and a chock guide surface are provided. Alternatively, the problem is solved by being guided so as to be slidable perpendicular to the contact surface. The invention further proposes that a piston-cylinder unit is provided in the mill housing, which acts on the back of the carrier plate. Finally, it is also possible to mount a replaceable wear plate with an abutment surface on the carrier plate.

[0006] This device provides a constant pressing force and frictional force,
The chocks in the window of the roll stand can be generated under bridging of driving play, that is, a constant pressing force and frictional force can be appropriately set without depending on rolling technical conditions. .

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail on the basis of an exemplary embodiment illustrated in the drawings:
In the window SF, it is guided between the guide surfaces FF1 and FF2 of the window so as to be able to move up and down in the direction of the double arrow DP. FIG.
In the beam SH1 shown to the left of the figure, there is a recess AS in the limiting surface of the window SF, in which a flat plate is slidably guided vertically with respect to the guide surface FF1. PL is incorporated. This plate is located on the side of the plate facing the chocks LE and its abutment surface AF,
It has a guide surface FF1 attached to it and acts on the piston of the piston-cylinder unit KZA contained in the beam SH from the back. Chock L
On the surface of the plate PL facing the abutment surface AF of E, a wear plate is mounted in a manner not shown, so that one side of this wear plate forms the guide surface FF1.

With the use of the piston-cylinder unit KZA, the plate PL, via a hydraulic control device (not shown), sets the adjustment interval AW in the recess AS by a choke L.
It can slide toward E. At this time, the pressing force FP calculated in advance and the resulting frictional force F
R is the guide surface FF1 and FF2 of the window SF and the chock LE
Between the pressing surfaces AF1 and AF2.

The plate PL can be used on the power side or the operation side in the case of a backup roll, an intermediate roll and a work roll of a roll stand.

[0010]

The device according to the invention makes it possible to operate over the entire pressing surface of the chock by varying the pressing force in order to generate a constant frictional force, independently of the respective rolling technical conditions. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a partial schematic view of a window SF formed in beams SH1 and SH2 of a roll stand as viewed in a roll axis direction.

[Explanation of symbols]

W Roll LE Chock SF Window FF1, FF2 Guide surface SH1, SH2 Beam PL Carrying plate AS Concave AW Adjustment interval KZA Piston-cylinder unit AF1, AF2 Contact surface FR Friction force FP Pressing force

Claims (3)

[Claims] An apparatus for regularly controlling a frictional force between a guide surface and a contact surface of a roll chock guided in a window of a roll stand, comprising: a guide surface (SF) in a window (SF). FF1; FF2) and a flat, back-pressable carrier plate (PL) are provided, within which window and chock guide surfaces (FF1; FF2) or abutment surfaces (AF1; AF
2) A device characterized in that it is slidably guided perpendicular to the device. 2. The piston-cylinder unit (KZA) provided in the beam (SH1; SH2) acting on the back of the carrier plate (PL). The described device. 3. The device according to claim 1, wherein the carrier plate (PL) is provided with an exchangeable wear plate.