JPS6195721A - Roll leveler - Google Patents

Abstract

PURPOSE:To improve the accuracy of straightening by forming a backup roll by plural roll pieces as well as supporting the roll pieces in a separately drivable state with respect to a leveling roll. CONSTITUTION:Each roll of a group of backup rolls, is formed by sectional roll pieces 10a, 10b, which are attached to axes 11 freely rotatably as well as are supported by bearings 12 separately. Each bearing 12 is connected to a worm box 15 through a rod 14, etc. and the power inputting axes of boxes 15 are connected to each other through couplings 17, 18. The couplings 17, 18 are provided with clutching functions respectively, and each box 15 is provided with a hydraulic motor 20 to vertically move the bearing 12 in order to press the roll pieces 10a, 10b separately. That is, the roll pieces 10a, 10b can be vertically moved all together, and are also capable of finely straightening local strains through the independent hydraulic motors 20. Accordingly, the accuracy of straightening is improved.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a roller leveler that corrects residual stress, distortion, etc. in a rolled strip, and particularly to a roller leveler that corrects residual stress and distortion in a rolled strip. Even if there is a distortion, it can be reliably corrected and a high-quality strip can be obtained.

<Prior art> In general, a strip rolled by a rolling mill has internal residues in the longitudinal and width directions of the strip during rolling or cooling due to the smelting or rolling process or uneven temperature distribution. It is known that the stress distribution becomes non-uniform. If the internal residual stress distribution of the strip becomes uneven, shape defects will appear in the strip due to local distortion such as mid-elongation, ear waves, or one-sided waves. A big problem is coming.

Normally, in order to prevent such shape defects in the strip, the strip is straightened in a hot or cold state, and various roller levelers are used for this purpose. The basic structure of this roller leveler is that a plurality of leveling rolls are alternately arranged vertically along the traveling direction of the strip so as to sandwich the strip.

In other words, the strip is passed between the upper and lower leveling rolls and bent repeatedly in the vertical direction to equalize the curvature of each part of the strip, and then the curvature is reduced to zero, thereby improving the shape of the strip. At the same time, the residual stress is reduced.

FIG. 3 shows the structure of an example of such a conventional roller leveler.
a+ and its cross-sectional structure taken along the line B-B (frame-shaped as shown in bl)) Inside the Uji leg 101 are frames 103 and 10 that face each other vertically with the band plate 102 in between.
4 is in position a, and a pair of front and rear balance cylinders 105
A lowering cylinder 106 provided in the housing 101 is connected to the upper frame 103 connected to the housing 101 via the lower frame 104.
The housing 101 is placed on a pair of front and rear wedge blocks 107 that are slidably attached to the housing 101 along the longitudinal direction of the housing 101. These wedge blocks 107 have strip plates 1
A round screw shaft 108 extending in the width direction of the wedge blocks 102 is screwed together in a penetrating state, and the screw directions of the screw shaft 108 are opposite to each other in the pair of wedge blocks 107. Therefore, this screw shaft 1
When the motor 109 connected to 08 is operated, the cutting blocks 107 move closer to each other or move away from each other.
Along with this, the lower frame 104 is attached to the housing 101.
It is designed to move up and down. A plurality of reinforcing roll pieces 110 divided along the width direction of the strip plate 102 are rotatably supported on the lower frame 104 via a spherical seat 111. A plurality of rows are arranged along the longitudinal direction, and a leveling roll 112 is placed between each row. An upper leveling roll 113 is vertically movably suspended from the upper frame 103 so as to be offset by half a pitch from the lower leveling roll 112, and these upper leveling rolls 113
A reinforcing roll piece 114 located between the J' and r rolls 113 is rotatably supported by the upper frame 103. Note that the lower frame 104 and wedge block 10
7th grade is the band plate 102 as is clear from Fig. 4 (bl)
The frame is divided into three along the width direction, and each frame 104
By changing the height of the strip plate 102, the pressing force along the width direction of the strip plate 102 is locally changed, and the effect of roll bending is intended to correct the shape of the strip plate 102 and uniformly reduce the residual stress in the width direction. are doing.

<Problems to be Solved by the Invention> Some conventional roller repellers attempt to remove distortion and residual stress in the width direction of the strip as described above, but the problem is rather vague. However, it was not intended to provide detailed correction.

The present invention can be applied not only in the longitudinal direction of the strip but also in the width direction I'
It is an object of the present invention to provide a roller repeller capable of performing fine correction.

Means for Solving the Problems> The present invention provides a plurality of leveling rolls that sandwich a strip and are arranged alternately up and down along the traveling direction of the strip; In a roller leveler having a plurality of reinforcement rolls that compensate for the pressing force of the leveling roll against the plate, each of the reinforcement rolls has a plurality of reinforcement rolls divided along its longitudinal direction.
Each of these roll pieces is movably supported in a direction opposite to the leveling roll.

Effect> When any roll piece is moved in the direction facing the leveling roll, the pressing force of this roll piece against the leveling roll changes. Therefore, by separately adjusting the pressing force of each roll piece against the leveling roll, it is possible to finely correct the strip along the width direction.

<Embodiment> Fig. 1 shows the side structure of an embodiment of the roller leveler according to the present invention. like,
The reinforcing roll group 3 is divided into a plurality of pieces (in this example, five pieces each) in a direction parallel to these axes both upper and lower.
The upper reinforcing roll group 3 is attached to an upper frame 4 which is vertically movably installed in the housing 6 by a roll lowering device 7, and is configured to press the upper leveling roll 2 to straighten the strip 1. In the figure, 5 indicates a lower frame, and 8 indicates a roll balance device. Pressing means for pressing the leveling roll 2 in a direction substantially perpendicular to the axis of each divided roll shaft 11 is provided on the roll pieces 10a on both divided end sides of the reinforcing roll group 3 and the roll piece 10b located in the middle thereof. are connected. That is, the a-roll piece 1 of the reinforcing roll group 3
0a and 10b are each rotatably attached to a shaft 11 supported by a bearing 12. Each bearing 12 is connected to a worm box 15 via a slide needle 13 and a rod 14, and is moved up and down by the operation of a worm mechanism (not shown) within the worm box 15. Input shafts 1 of each of the worm boxes 15 are fixedly installed in parallel in the width direction of the strip plate 1 on the upper frame 4.
6 are connected to each other via couplings 17, and furthermore, the input shaft 16 on one end side is connected to the coupling 18.
It is connected to a drive motor 19 via. The couplings 17, 18 each have a latching function and can be disconnected as required. Each worm box 15 is equipped with a hydraulic motor 20, and the hydraulic motor 2 is operated separately from the drive from the input shaft 16.
0 moves the bearing 12 up and down, and the roll piece 1
0a and 10b can be pressed independently. Further, the reference numeral 21 in the figure is a cover for the upper and lower sections. Although not shown, the roll piece 10
The roll piece 10a is used to alleviate locally excessive surface pressure applied to the outer circumferential surface of the leveling roll 2 by a and 10b.

Preferably, 10b is barrel-shaped so that the diameter decreases at both ends.

Therefore, when the drive motor 19 is driven, all the rods 14 are simultaneously pressed downward by the operation of the worm box 15, and all the roll pieces 10a and 10b press the leveling roll 2 by the same amount. On the other hand, the drive motor 19
When the hydraulic motor 20 is operated separately, the roll piece 1
0a and 10b can move up and down independently, and any pending force can be applied to the leveling roll 2. In this way, in this embodiment, the simultaneous pressing and single pressing of the roll pieces 1'Oa and 10b can be performed in any combination in accordance with the required conditions, but it is possible to press them individually. It may also be configured as just It should be noted that the above-described configuration can, of course, be applied to any or all of the reinforcing roll groups in the strip running direction. For reinforcing roll groups to which the configuration of the present invention is not applied, suppression is performed only by the roll rolling down device 7. Further, although the above explanation has mainly been made regarding the case where the present invention is applied to the upper reinforcing roll, the present invention can be similarly applied to the lower reinforcing roll.

<Effects of the Invention> According to the rolling down device of the present invention, each of the roll single rolling blades for the leveling roll can be controlled according to the required straightening conditions, so that local distortion over the entire length and width of the strip can be reduced compared to the conventional method. It is possible to straighten things more finely than ordinary objects, and it is possible to obtain products with extremely high commercial value.

[Brief explanation of drawings]

FIG. 1 (-) is a side view showing a schematic structure of an embodiment of a roller repeller according to the present invention, FIG. , Figure 3 (
al is a side view showing a schematic structure of an example of a conventional roller repeller, and FIG. 3 fbl is a sectional view taken along the line-B arrow. Also, in the symbols in the figure, 1 is a strip plate, 2 is a leveling roll, and 3
10a is a reinforcing roll group, 4 is an upper frame, 5 is a lower N frame, 6 is a nozzle, 7 is a roll lowering device, 8 is a roll balance device, and 10a. 10b is a roll piece, 11 is a split roll shaft, 12 is a bearing,
14 is a rod, 15 is a worm box, 16 is an input shaft, 17.18 is a coupling, 19 is a drive motor, 20
is a hydraulic motor.

Claims (1)

[Claims] A plurality of leveling rolls sandwiching a strip and arranged alternately up and down along the traveling direction of the strip, and a plurality of reinforcing rollers that come into contact with each of these leveling rolls to compensate for the pressing force of the leveling rolls against the strip. In the roller leveler having a roll, each of the reinforcing rolls is composed of a plurality of roll pieces divided along its longitudinal direction, and each of these roll pieces is supported so as to be drivable in a direction opposite to the leveling roll.