JPH0534096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a roller leveler for straightening a board with poor flatness to make a board with a good flat shape.

[Prior Art] In a conventional roller leveler, upper and lower roll groups each having a large number of rolls of the same diameter are arranged in a staggered manner with gaps that can give a small radius of curvature strain to the plate material. Straightening is performed by passing a steel plate between the roll groups. However, with such conventional roller levelers, there is a limit to the range of plate thickness that can be straightened. When straightening a plate, a sufficient straightening effect cannot be achieved. On the other hand, if a smaller roll pitch is used to sufficiently straighten a thin plate, a large straightening reaction will occur when straightening a thick plate. There is a risk that rolls, bearings, etc. may be damaged by the force, and this tendency is particularly noticeable when straightening plates with a high yield point, as has been the case in recent years.

In addition, especially in the case of thin plates, waving, elongation, warping in the width direction, etc. are more likely to occur than in thick plates, but in the conventional roller leveler described above, warping in the longitudinal direction is more likely to occur. Although it can be corrected relatively easily, it has not been possible to correct ear waves, mid-length elongation, warpage in the width direction, etc.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention is capable of sufficiently correcting thin plate materials to thick plate materials even when the yield point is high, and also improves ear waves, middle This improves the ability to correct shapes that have been considered difficult in the past, such as elongation and warping in the width direction.

[Means for Solving the Problems] The present invention provides a plurality of upper small diameter rolls disposed above the front part of the plate material passing line, a split support roll that supports each of the upper small diameter rolls from above, and a split support roll of the split support rolls. An upper small pitch roll group is formed from a support frame installed directly above, and a bending cylinder that connects the support frame and each divided support roll to apply bending force to the upper small diameter roll via each divided support roll. , a plurality of lower small-diameter rolls disposed at the lower side of the front stage of the plate material passing line, shifted in position from the respective upper small-diameter rolls when viewed from above;
A split support roll that supports each lower small diameter roll from below, a support frame installed directly below the split support roll, and a lower small diameter roll that connects the support frame and each split support roll to A lower small pitcher roll group is formed from a bending cylinder that applies bending force to the roll, and a vertical movement device is provided for vertically moving both or one of the upper small pitcher roll group and the lower small pitcher roll group, and the latter part of the plate material passing line is provided. An upper large pitcherol group and a lower large pitcherol group shifted from the upper large pitcherol group when viewed from above, and a vertical movement for vertically moving both or one of the upper large pitcherol group and the lower large pitcherol group. The present invention relates to a roller leveler characterized by comprising a device.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is an upper small pitch roll group having an upper small diameter roll 2, a split support roll 3 having a spherical outer peripheral surface that supports the upper small diameter roll 2, and a bending cylinder 4 connected to the support roll 3; A lower small-diameter roll 6 and a lower small-diameter roll 6 arranged at a position shifted from the upper small-diameter roll 2 when viewed from above.
9 is a lower small pitch roll group having a split support roll 7 supporting the support roll 7 and a bending cylinder 8 connected to the support roll 7; The pitch roll group 12 is a lower large pitch roll group having a large diameter roll 13 and a support roll 14 that supports the large diameter roll 13, and the lower large pitch roll group 12 is positioned relative to the upper large pitch roll group 9 when viewed from above. Pinch rolls 15 for pushing the plate material S are provided upstream of the upper and lower small pinch roll groups 1 and 5.

Further, the upper small pitch roll group 1 and the support frame 16 are provided with a balance cylinder 17 and reduction screws 18, 18, and the support frame 19 of the upper large pitch roll group 9 is provided with a balance cylinder 20 and reduction screws 21, 21, respectively. There is. still,
22 is a support frame for the lower small pitch roll group 5;
23 is a support frame for the lower large pitch roll group 12.

Next, the effect will be explained.

When correcting the shape of a thin plate material S,
The upper small pitch roll group 1 is lowered by the reduction screws 18, 18 so that a strong reduction can be applied to the plate material S, and the upper large pitch roll group 9 is lowered by the reduction screws 21, 21 so that a light reduction can be applied to the plate material S. Make it. At this time, the support frame 19 is tilted by adjusting the reduction screws 21, 21 so that the gap between the large diameter rolls 10, 13 is small on the upstream side and becomes large on the downstream side.

When the shape is corrected in such a state, the plate material S is strongly compressed by the upper and lower small diameter rolls 2 and 6, and the plate material S is
is given a strain with a small radius of curvature, and the large diameter rolls 10 and 13 on the downstream side give a strain with a gradually large radius of curvature until it reaches infinity. Therefore, a product with good shape can be obtained. In addition, in the above operation, by applying a pushing force to the plate material S with the pinch rolls 15 arranged on the upstream side, the sheet threadability is greatly improved, and the effect is further increased especially when roll bending is performed. do.

When correcting the shape of a thick plate material S,
The small pitch roll group 1 is raised to the extent that it can be used as a pinch roll by the rolling screws 18, 18, the large pitch roll group 9 is lowered by the rolling screws 21, 21, and tilted in the same manner as described above, and the large diameter rolls 10, 13 The shape of the plate material S is corrected.

In addition, if there is an ear wave or elongation in the plate material S, the bending cylinders 4 and 8 of the upper and lower small diameter roll groups 1 and 5 are adjusted to bend the individual upper and lower small diameter rolls 2 and 6 as required. Then, the plate material S is straightened. Furthermore, if the plate material S is warped in the axial direction, as shown in FIGS. 2 and 3, the corresponding upper and lower small diameter rolls 2 and 6 are sequentially given roll crowns in opposite directions. Work is performed by adjusting the bending cylinders 4 and 8.

In this way, by using the bending cylinders 4 and 8, the amount of elongation of the plate material S can be made uniform.

If the pinch rolls 15 (material pushing device) are disposed in the upstream position of the upper and lower small pitch rolls 1 and 5 in the front stage as shown in FIG. 1, deterioration of sheet threading performance can be prevented even if the roll gap is narrowed.

In the above embodiments, any other type of rolling down mechanism may be adopted, and at the same time, the rolling down mechanism may be a rolling down type from below. Furthermore, the outer periphery of the support roll may be cylindrical and not have alignment, and other methods may be used. Of course, various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, according to the roller leveler of the present invention, each upper small diameter roll of the upper small pitch roll group that is movable up and down is given the required bending, and the lower small diameter roll that is movable up and down is By making it possible to give the required bending to each of the lower small diameter rolls of the pitch roll group, it is possible to equalize the amount of elongation of the plate material and obtain a product with a good shape. This improves the range of plate thicknesses that can be straightened, and makes it easier to roll down thin sheets with high yield stress.Furthermore, when rolling thick plates with the large pitch roll group, strong rolling is performed with the small pitch roll group. Since an appropriate curvature is given without any distortion, it is easy to bite the plate, and furthermore, since the small pitch roll group and rolling force can be small, the small pitch rolls, bearings, etc. are not damaged.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of the roller leveler of the present invention, and FIGS. 2 and 3 are schematic front views showing the state in which the roller leveler of the present invention is used to correct warpage in the width direction of a plate material. 1 is an upper small diameter roll group, 2 is an upper small diameter roll, 3 is a split support roll, 4 is a bending cylinder, 5 is a lower small pitcher roll group, 6 is a lower small diameter roll, 7 is a split support roll, 8 is a bending cylinder, 9 indicates an upper large pitch roll group, 10 indicates a large diameter roll, 12 indicates a lower large pitch roll group, 13 indicates a large diameter roll, and 15 indicates a pinch roll.

Claims (1)

[Claims] 1. A plurality of upper small-diameter rolls arranged above the front stage of the plate material passing line, a divided support roll that supports each upper small-diameter roll from above, a support frame installed directly above the divided support roll, and the support frame. An upper small pitch roll group is formed from a bending cylinder that connects each split support roll and applies bending force to the upper small diameter roll via each split support roll, and the A plurality of lower small-diameter rolls arranged at a position shifted from each upper small-diameter roll, a split support roll that supports each lower small-diameter roll from below, a support frame installed directly below the split support roll, and the support A lower small pitch roll group is formed from a bending cylinder that connects the frame and each divided support roll and applies bending force to the lower small diameter roll through each divided support roll, and Both or one of them is provided with a vertical movement device that moves up and down, and an upper large pitch roll group and a lower large pitch roll group are arranged at a position shifted from the upper large pitch roll group when viewed from above at the rear stage of the plate material passing line, and A roller leveler comprising a vertical movement device for vertically moving both or one of the large pitch roll group and the lower large pitch roll group.