JPH04138821A - Tension leveller - Google Patents

Abstract

PURPOSE:To correct the stretch, the C-warp and the L-warp of the strip part by arranging a strip shape detecting means and C-warp detecting means on the outlet side of the high tension range in the tension leveller and also setting a roller leveller at the low tension range. CONSTITUTION:The strip shape detecting means 17 and the C-warp detecting means 22 are arranged at the outlet side part of the high tension range, the partial elongation and C-warp of the strip S is detected, and they are corrected by automatically controlling the elongation rate of the high tension range, or the roll reduction of the roll unit N for correcting C-warp, the roll shifting amt. and the roll bending volume, and also L-warp of the strip S is corrected with the roller leveller B of the low tension range, so the sample cut for the strip S at the down stream of the tension leveller becomes needless, and the down time for the line can be reduced, and the working member can be saved. Even if the variation of L-warp is generated, the amount of L-warp can be regulated to constant within the defined value with the roller leveller B.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application> The present invention relates to a tension leveler that corrects defects in the shape of a strip (thin metal strip) by applying elongation and bending to the strip.

<Prior Art> Figure 5 schematically shows an example of a conventional tension leveler that corrects defects in board shape by applying elongation and bending to the strut.

In the figure, a tension area is formed by an inlet side prydle roll unit 119 and an outlet side prydle roll unit 120, and an elongation roll unit 121 and a warpage correction roll unit 122 are arranged in the tension area (B).

In this tensile leveler, tension is applied to the running strip S by both prydle sail units 119 and 120, and the stretching roll unit 121 is rolled down to stretch the strip in the longitudinal direction of the strip, so that the residual stress in the width direction of the strip is not constrained.
In addition to correcting elongation in the middle, elongation at the edges, etc., the warp correction roll unit 122 is rolled down to correct the warp in the width direction of the strip S caused by the correction by the upstream elongation roll unit 121 (referred to as warp in the board width direction) and in the longitudinal direction of the board. Correct the ru (referred to as L anti-second).

<Problems to be Solved by the Invention> A large warp that occurs when the strip S is straightened in plate shape by the elongation roll unit 121 is corrected by an appropriate rolling amount of the warp correction roll unit 122. ), it is difficult to judge the amount of warpage, and the amount of warpage is checked by cutting a sample of the strip S in the wake of the tension leveler, and the amount of warpage of the warp correction roll unit 122 is adjusted to achieve appropriate rolling. Since the amount of reduction was being searched, it took a great deal of time and effort to find the appropriate reduction amount for each of the various strips S to be processed with this tension leveler.

In addition, if the rolling amount of the warpage correction roll unit 122 is constant due to changes in plate thickness, yield point fluctuations, or tension fluctuations from the device itself in the same strip coil, especially L
The amount of warpage tends to vary, and it is difficult to eliminate warpage over the entire length of the same strip coil.

The same goes for correction of partial elongation; it is necessary to visually check the strip shape after correction, adjust the roll shift amount or roll bending amount, and search for the appropriate amount.
Similar to warpage adjustment, it required a great deal of time and effort.

Means for Solving the Problems> A tension leveler according to the present invention that solves the above problems is a tension leveler in which a strip tension area is formed by a priddle roll unit, and a strip straightening roll unit is disposed in this tension area. A zero-second straightening roll in a full leveler, which forms a high tension region in the tension region and forms a low tension region downstream thereof, and includes an elongated roll unit, a tapered roll shift mechanism, and a trawl bending mechanism in the high tension region. A roller leveler capable of tilting reduction is arranged in the low tension region, a plate shape detection means and a C warp detection means are arranged in the exit side of the high tension region, and the C warp detection means A reduction amount automatic control means automatically controls the reduction amount of the C warp correction roll unit based on the detected value, and an elongation rate of the strip or a shift amount of the roll shift mechanism and a shift amount of the roll bending mechanism are determined based on the detection value of the plate shape detection means. The present invention is characterized by being provided with means for automatically controlling the amount of bending.

Function> In the tensile tension leveler having the above structure, the strip fed to the high tension area from the previous process is stretched by the stretching roll unit to correct partial elongation such as edge elongation and mid-elongation. Then, the partial elongation of the strip is detected by the plate shape detection means, and the tension (elongation rate) due to the pre-dol roll unit in the high tension range is determined. The amount of bending is automatically controlled and the strip is straightened so that the partial elongation is within a predetermined value.

Next, the amount of C warp of the strip that has come out of the high tension area is detected by a C warp amount detection means, and the amount of rolling of the zero-second straightening roll unit is automatically controlled based on the amount of C-warp, so that the amount of zero second correction is specified. Straighten the strip to be within the value.

Next, the strip is introduced into a low tension area, and bent in the longitudinal direction of the plate by tilting pressure of a roller leveler, and the exit side thereof is flattened to correct the warp amount of the strip to a constant value.

Example of implementation Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a device arrangement state of a tension leveler according to one embodiment, FIG. 2 shows a side view of the roll arrangement state of a C inversion correction roll unit, and FIG. A cross section of the side-divided backup roll in the figure is shown, and FIG. 4 shows a plane view of the work roll and deflector roll in FIG. 2 and their shifted states.

1st y! J, the high tension area of the strip S formed by the inlet side prydle roll unit 19 and the outlet side prydle roll unit 20 (roll unit 1
9.20) are provided with a plate shape detection bud 17 and a deflector roll 21 which also serve as deflector rolls for the elongation roll units A and C warp correction roll unit N1.

The plate shape detection 1117 detects the roll shift bending device 9 for the work roll 1 and the side-divided backup roll 4 in the 0-9 straightening roll unit N, the roll shift device 14 for the lower work roll 11, and the priddle roll unit 19 for the lower work roll 11. 20 elongation rate eave motors 18
is connected to.

On the downstream side of the prydle roll unit 20 on the exit side, a low tension area of the strip S (prydle roll unit 31.
32) is formed, and in this low tension area, a roller leveler B is provided, in which an upper work roll 21 and a lower work roll 29 are arranged in a staggered manner above and below the pass line of the strip S. .

C warpage is detected between the Prydle roll unit 20 on the exit side of the high tension area and the Prydle roll unit 31 on the inlet side of the low tension area! 22 is installed, and B's C warp detection @22
is connected to the drive motor 23 of the lowering device 15 of the lower work roll unit 11 in the C warp correction roll unit N. Note that the C warp detection unit 22 may be arranged in the low tension region.

As shown in FIGS. 2 and 4, the roll group of the C warp correction roll unit N includes a work roll 1 whose end on the working side is tapered, and a pair of intermediate rolls that are in contact with the work roll 1. 2. A center split reinforcing roll 3 that abuts both sides of the intermediate roll 2, a pair of side split backup rolls 4 that are pivotally attached to the eccentric shaft 5, and a lower workpiece whose driving side end is tapered. It consists of roll 11.

As shown in FIG. 3, the side-divided backup roll 4 is rotatably attached to a center eccentric part 5m, a concentric part 5m, and a side eccentric part 5c which is scratched in the opposite direction to the center scarred part 5a of the eccentric shaft 5, as shown in FIG. This eccentric shaft 5 is rotatably supported by a frame 6 and is connected to a roll bending device 9m.
is connected to.

As shown in FIG. 4, the drive side of the work roll 1 is
The drive side of the lower work roll 11 is connected to the roll shift device @9b via a tick 8 movable in the roll axis direction, and the drive side of the lower work roll 11 is connected to the roll shift device @9b via a tick 12 movable in the roll axis direction. It is connected to 14.

Next, the straightening action of the tensile strength leveler having the above structure will be explained.

A high tension is applied to the strip S fed from the previous process by both priddle roll units 19 and 20, and it is stretched by the elongation roll unit A, so that the residual stress in the width direction of the strip is not restricted and the edge elongation is achieved. Corrects partial elongation such as mid-elongation.

Then, the residual elongation of the strip S is detected by plate shape detection l#17, and fed back to the elongation rate control motor 18 of the priddle roll unit 19 to change the elongation rate, or the elongation rate of the C rectifying roll unit N is Roll bending device 9a, roll shifting device 9b, 1
4, and if there is edge elongation S, for example, shift the work roll L and lower work roll 11 as shown in FIG. Correct partial elongation.

Note that this roll shift and roll bending are just examples, and there are various patterns depending on the shape of each plate.

Then, the amount of C warp of this strip S is detected by the amount of C warp l#
22 and feeds it back to the drive motor 23 of the rolling down device 15 of the C-warp correction roll unit N, and according to the detected value, lowers the lower work roll 11 to bend the strip S and straighten the C-warp. Correct.

Next, low tension is applied to the strip S by both priddle roll units 31 and 32, and the strip S is tilted down by a roller leveler B to bend it in the longitudinal direction of the plate,
Flatten the exit side and correct the warpage.

<Effects of the Invention> According to the tensile strength repeller according to the present invention, the plate shape detection means and the C-reverse 9-detector are arranged in the exit side portion of the high-tension region, and the partial elongation and C repulsion of the strip are detected. The elongation rate in the high tension range, the reduction amount of the C warp correction roll unit, the roll shift amount, and the amount of roll benzo ink are automatically controlled and straightened, and the warp of the strip is corrected by the roller leveler in the low tension range. There is no need to sample-cut the strip in the wake of the tension leveler, which reduces downtime on the line and reduces the number of workers.

In addition, even if variations in L warp occur in the same strip due to changes in strip thickness, yield point fluctuations, or tension fluctuations from the device itself, the roller leveler in the low tension range can maintain the L warp amount within the specified value. It can be corrected to a certain extent.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing the clever arrangement of a tension leveler according to an embodiment of the present invention, Fig. 2 is a schematic side view showing the four-wheel device of the C warp correction roll unit, and Fig. 3 is a side split. FIG. 4 is a cross-sectional view of a backup roll, FIG. 4 is a partial WJ view of a C warp correction roll unit, and FIG. 5 is a schematic side view showing the roll arrangement of an example of a conventional tension roller leveler. In the drawings, A is an extension roll unit, B is a roller leveler, NLtC warp correction roller unit, S is a strip, 1 is a work roll, 4 is a side split backup roll, 9 is a roll shift bending device, 11 is a lower work roll, 14 is a 15 is a roll-down device; 17 is a plate shape detector; 18 is a motor for controlling elongation rate; Mitsubishi Heavy Industries, Ltd

Claims (1)

[Claims] In a tension leveler in which a strip tension area is formed by a priddle roll unit and a strip straightening roll unit is arranged in this tension area, a high tension area is formed in the tension area and a low tension area is formed downstream thereof. An elongated roll unit, a tapered roll shift mechanism, and a roll bending mechanism are provided in the high tension area, and a sheet width direction warping correction roll unit is provided, and a roller leveler capable of tilting reduction is provided in the low tension area. , a plate shape detection means and a plate width direction warp detection means are arranged in the exit side part of the high tension area, and the rolling amount of the plate width direction warp correction roll unit is automatically controlled based on the detected value of the plate width direction warp detection means. and a means for automatically controlling the elongation rate of the strip or the shift amount of the roll shift mechanism and the bending amount of the roll bending mechanism based on the detection value of the plate shape detection means. Tension leveler.