JPS60145219A - Roll leveler and method for using said roll leveler - Google Patents

Abstract

PURPOSE:To enlarge the thickness range of a steel sheet capable of straightening the steel sheet and to perform its optimum straightening by using intermediate rolls arranged between work rolls and backup rolls instead of the drawn out work rolls in accordance with the thickness of a steel sheet. CONSTITUTION:When a steel sheet S is thin, the sheet S is straightened in shape by work rolls 4, 9 shown by the right half in the figure. At that time, the rolls 4, 9 are driven by the frictional forces between intermediate rolls 5, 10 and these rolls 4, 9. When a steel sheet S is a thick one S, the rolls 4, 9 are drawn out to the operation side free from a driving device by a proper means, and the rolls 5, 10 are used as the work rolls as shown by the left half in the figure, to straighten the sheet S in shape. In this case, the work rolls are made small in diameter and the intermediate rolls large, respectively, but the large-diameter work rolls and small-diameter intermediate rolls are also available.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roller leveler that can straighten the shape of a steel plate, and more specifically, a roller leveler that can widen the range of thickness that can straighten a steel plate. and how to use the roller leveler.

[Prior Art] Conventionally, the same roller leveler has been used to correct the shape of steel plates within a certain thickness range. However, in the case of auxiliary plates, it is necessary to reduce the radius of curvature of the bent part of the steel plate, so it is desirable to use a small diameter roll as the work roll, and in the case of thick plates, the radius of curvature of the bent part is large. It is desirable to use a large diameter roll because it is easy to roll and the rolling reaction force is large. Therefore, in the past, there was a limit to the range of plate thickness that could be corrected by the same roller leveler, and it was not possible to sufficiently correct the shape over a wide range of plate thicknesses.

[Object of the Invention] An object of the present invention is to provide a roller leveler that can widen the thickness range of a steel plate that can be shaped, and a method of using the roller leveler.

[Light 1! In the present invention, a work roll and an intermediate roll with different diameters are provided, and in the case of a steel plate of the same thickness, the work roll is used to correct the shape, and when the thickness changes, the work roll is moved to the line. Shape correction is performed by pulling out the intermediate roll and using it as a work roll. Therefore, the range of plate thickness that can be corrected becomes larger, and accurate correction becomes possible.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the entire roller leveler of the present invention, and an upper frame 3 that can be raised and lowered by a lowering device 2 is provided on the upper part of a housing 1, and the upper frame 3 has the following features:
A work roll 4, an intermediate roll 5 whose outer diameter is larger than that of the work roll 4, and a work roll 4 via the intermediate roll 5.
A backup roll 6 for backing up is provided. The intermediate roll 5 is connected to a coupling (not shown) and is driven by a spindle rotated by a drive device, and the work roll 4 is connected to a coupling not shown.
It is designed to be driven by the frictional force between the

At the bottom of the housing 1, there are 4
The lower frame 8 allows the lower roll group to be tilted by changing the push-up distance on the entry side and the exit side so that the lower roll group can be lowered.
The lower frame 8 is provided with a work roll 9, a medium-thin roll 10 whose outer diameter is larger than the work roll 9, and a backup roll 11 that backs up the work roll 9 via an intermediate [1-ru] 10. .

The intermediate roll 10 is connected to a coupling like the intermediate roll 5, and is driven by a spindle rotated by a drive device, and the work roll 9 is driven by frictional force with the intermediate roll 10. It has become.

In the case of a thin steel plate 5Ifi, the shape is corrected using work rolls 4 and 9 as shown in the right half of FIG. At this time, the work rolls 4 and 9 are driven by the frictional force of the intermediate rolls 5 and 10.

When the steel plate S is a thick plate, the work roll 4 is
．． 9 is pulled out to the work side where there is no drive device, and as shown in the left half of FIG. 2, the intermediate rolls 5 and 10 are used as work rolls to correct the shape.

In addition, in the embodiments of the present invention, the case where the work roll is made small in diameter and the intermediate roll is made in large diameter is explained, but it is also possible to carry out the work even if the work roll is made large in diameter and the intermediate roll is made in small diameter. It goes without saying that straightening may be performed, that a backup roll may be driven instead of driving the intermediate roll, and that other changes may be made without departing from the gist of the present invention. be.

[Effect of the invention] According to the roller leveler and the method of using the roller leveler of the present invention, an intermediate roll having a diameter different from that of the work roll is provided between the work roll and the backup roll, and the work roll is pulled out according to the plate thickness. This allows intermediate rolls to be used as work rolls.
Straightenable steel plate thickness V! The scope is expanded and optimal correction can be performed, which can produce excellent effects in each field.

4. l1lu) rfRtll Explanation FIG. 1 is an explanatory diagram of a roller leveler applied to the present invention,
FIG. 2 is an explanatory view of the case where the roller leveler of FIG. 1 is used to correct the shape of a steel plate, with the right half showing a state in which a thin plate is being corrected, and the left half showing a state in which a thick plate is being corrected.

In the figure, 4.9 is a work roll, 5, 1o is an intermediate roll, and 6
．． 11 indicates a backup role.

Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Scope of Claims] 1) A roller leveler characterized in that a drivable intermediate roll is disposed between a replaceable work roll and a backup roll. 2) When straightening a steel plate of a predetermined thickness, straightening is performed by a work roll driven by an intermediate roll, and when straightening a steel plate of a different thickness from the above-mentioned steel plate, the work roll is pulled out of the line and the intermediate roll is A method of using a roller leveler characterized by performing correction.