JPH0729137B2 - Camber straightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bending in a width direction of a cutting plate and a strip,
That is, the present invention relates to a camber straightening device that partially rolls a material in which camber is generated and removes the camber.

(Prior Art) A conventional camber straightening device is, for example, shown in FIGS.
As shown in the figure, a method of straightening the camber by applying bending to the cutting plate 3 in which the camber is generated by three rolls 8 in the opposite direction, and FIGS.
As shown in the figure, there is a device for correcting the camber by applying a reverse bending to the plate 3 with a mold 9 for the plate 3 in which the camber is generated. As an example of the strip, in the case of a steel strip (hereinafter referred to as a strip), as shown in FIG. 13, tension is applied to the strip 13 by the tension generator 10 in a strip state,
A device that repeatedly bends the strip 13 with the tension leveler 11 to continuously perform camber correction,
As shown in FIG. 14, while the camber-generated plate material 3 is chucked by the chucking device 12,
Camber correction of the plate material 3 is performed by applying a tension in the plate length direction to generate a descending elongation in the plate material 3.

(Problems to be Solved by the Invention) The camber straightening device according to FIGS. 8, 9 and 10 and 11 described above does not apply reverse bending when applying reverse bending in the plate width direction of the plate material 3. The required straightening force is concentrated at the contact point between the roll 8 and the plate material 3 and at the contact point between the die 9 and the plate material 3, and as a result, the extreme plastic deformation portion is formed at both ends of the plate width of the plate material 3 as shown in FIG. However, there are disadvantages in that in order to solve this problem, in many cases, extra work such as maintenance of the grinder at both ends of the plate width in the subsequent process is required.

Further, the so-called tension leveling device as shown in FIG. 13 not only requires a great amount of equipment cost, but also when a camber occurs once the strip 13 is cut into a cutting plate, it no longer functions as a camber straightening device. I can't.

Further, as shown in FIG. 14, in the method using stretch leveling, the portion clamped by the chucking device 12 causes plastic deformation that cannot withstand use, and the portion must be cut and removed by a shear, resulting in product yield. Has the drawback of becoming worse.

The present invention has been made to solve the above-mentioned drawbacks, and even in a striped state and a cut plate state of a material in which camber has occurred, it is a relatively inexpensive equipment cost, and is extremely plastic inconvenient as a product. An object of the present invention is to provide a camber straightening device that can smoothly correct the camber of a material without generating a deformed portion.

(Means for Solving Problems) A configuration of the present invention for solving the above problems and achieving the object of the present invention will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. . According to the present invention, the backup roll 4 is disposed in close proximity to at least one of the upper and lower sides of the work rolls 1 which are provided relative to each other, and a large-diameter roll portion is formed at a position different from the width center of the material to be straightened in the backup roll 4. Then, the camber generated in the material to be straightened 3 is removed and straightened by the camber straightening device in which the body length of the large diameter roll portion is formed narrower than the width of the material to be straightened 3.

(Operation) That is, since the present invention has the device configuration as described above,
For example, the material to be straightened 3 in which camber is generated is clamped by the work rolls 1 which are provided opposite to each other, and a part of the roll is made large in diameter, and the body length of the large diameter portion is made narrower than the width of the material to be straightened 3. By arranging the backup rolls at different positions from the width center of the material to be straightened 3, the material to be straightened 3 is subjected to a strong pressure as shown in FIG. It is down-rolled and the rest is lightly rolled or not rolled at all. As a result, the camber is corrected by intensively rolling the shaded portion as shown in FIG. 7b. Further, since the portion that comes into contact with the material to be straightened 3 is a work roll having a uniform roll diameter in the cylinder length direction, it acts so as to achieve the camber straightening without giving an extreme plastic deformation portion or damage to the material to be straightened 3. To do.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1 and FIG. 2, the work rolls 1 which are vertically disposed are a pinion stand 5 and a universal joint 2.
It is arranged so as to be rotationally driven by the drive motor 6 via.

A backup roll 4 having a large diameter at least one of the opposing work rolls, only the work roll 1 on the upper side in this drawing, is provided. The body length of the large-diameter portion of the backup roll 4 is narrower than the width of the material to be straightened 3, and in this figure, the large-diameter portion is located toward the right side, that is, the material to be straightened. It is arranged at a position different from the width center of No. 3. The respective rolls are rotatably supported by bearings 14 and are configured to be freely rotatable by the rotational drive of the drive motor 6.

2A and 2B are sectional views taken along the line AA in FIG. 1. In FIG. 2A, the backup roll 4 in which a part of the roll has a large diameter is attached to the work roll 1 on the upper side. This is an example in which one backup roll is provided, and FIG. 2B is an example in which two backup rolls are provided.

Next, FIG. 3 shows a second embodiment of the present invention, in which one of the work rolls 1 which is vertically opposed to each other, in FIG. The backup roll 4 formed in the above is disposed, and the backup roll 15 having a constant outer shape in the axial direction is disposed in the vicinity of the other work roll, so that a higher reduction rolling can be performed than in the first embodiment of the present invention. It is configured to be possible.

FIG. 4 is a third embodiment of the present invention, in which a backup roll 4 having a body part partially formed with a large diameter is provided in proximity to both work rolls 1 which are vertically arranged, and a camber straightening device is provided. Is configured.

FIG. 5 shows a fourth embodiment of the present invention, in which one of the upper and lower work rolls, in this case, the work roll adjacent to the upper work roll, can be shifted in the axial direction of the upper work roll 1. The short roll length backup roll 4 is arranged and configured to be shifted by the axial position adjusting device 16. Further, the backup roll 15 is provided for the purpose of ensuring the rigidity of the short roll length backup roll 4, One work roll 1 has a backup roll 15 with a uniform outer shape.
Is provided to form a camber straightening device.

FIG. 6 shows a fifth embodiment of the present invention, in which a short roll backup roll 4 which can be shifted in the axial direction of the upper and lower work rolls is arranged close to both the work rolls 1 which are vertically opposed to each other. The axial position adjustment device 16
The camber straightening device is constituted by arranging a backup roll 15 having a constant outer shape for the purpose of ensuring the rigidity of the back up roll 4. The axial position adjusting device 16 is not limited to the structure shown in this figure.

In this way, the backup roll is arranged close to at least one of the upper and lower sides of the work rolls that are provided relative to each other, and a large-diameter roll portion is formed at a position different from the width center of the material to be straightened in this backup roll. By providing the camber straightening device in which the body length of the roll portion is formed narrower than the width of the material to be straightened, it is possible to intensively roll a part of the material to be straightened 3 in the width direction, and moreover, the material to be straightened. Since the work rolls 1 which are vertically opposed to each other in contact with the rolls 3 are rolls having a constant outer shape, the camber can be straightened without damaging the material to be straightened 3.

(Effects of the Invention) In the present invention, as described above, the backup roll 4 is provided in close proximity to at least one of the upper and lower sides of the work rolls 1 that are provided relative to each other, and the backup roll 4 differs from the width center of the material 3 to be straightened. A large-diameter roll portion is formed at a position, and the body length of the large-diameter roll portion is formed to be narrower than the width of the material 3 to be corrected. It is possible to straighten the camber of 3 and moreover, the material to be straightened 3
Since the contact portion with the work roll 1 has a uniform outer shape,
There is an industrial effect that the camber straightening can be performed without damaging the material to be straightened.

Furthermore, this camber straightening device can be effectively used as an online camber straightening device used in a method of installing in a shear line or a slitter line, while in the so-called offline usage mode, the material in which the camber is generated is removed. It also has the effect of two birds with one stone, which can also be used for selective correction.

The first embodiment of the present invention shown in FIG. 1 can be installed at a low cost because it has the simplest structure, and the second and third embodiments of the present invention shown in FIGS. 2 and 3 can be installed. Is slightly more expensive, but is effective for correcting the camber of a material having a relatively high tensile strength and a wide width. The fourth embodiment of the present invention shown in FIG. 4 has a structure in which the backup roll 4 having a partly large diameter in the cylinder length direction can be shifted in the axial direction. Therefore, in the above embodiment, the camber of the material to be straightened 3 is cambered. Although the reversing work is necessary depending on the direction of generation, according to the present embodiment, the position of the backup roll 4 can be adjusted according to the direction of generation of camber. This contributes to labor saving in the sense that no reversing work is required. The camber straightening device according to the fifth embodiment of the present invention shown in FIG. 6 effectively acts as a camber straightening device for a wide material having a higher tensile strength than that of the above-mentioned embodiments.

As an example similar to the present invention, FIG. 15 is conceivable, but in this case, the material to be straightened 3 is rolled unevenly as shown in FIG. 16, which is inconvenient and does not match the purpose of the present invention.
It is not within the scope of the invention.

As another application of the present invention, when it is installed in a slitter line or the like, for example, in order to correct a camber generated in a material having three slits, a part of a roll having a large diameter is formed in two or three places. Backup roll 4 provided
Is installed and used as a camber straightening device which is disposed in the vicinity of work rolls which are vertically arranged relative to each other, thereby functioning as a more effective camber straightening device.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a camber straightening device according to a first embodiment of the present invention, FIG. 2a is a first example showing a section AA of FIG. 1, and FIG. 2b is a first example. A second example showing a section AA in the drawing, FIGS. 3 to 6 are longitudinal sectional views of a camber straightening device according to second to fifth embodiments of the present invention, and FIG.
Is an example of a stress distribution generated in the material to be straightened during the camber straightening, FIG. 7b is a camber straightening explanatory view, FIG. 8 is a camber straightening device using three rolls, and FIG. 9 is a sectional view B in FIG. -B, Fig. 10 is an explanatory view of a press straightening device, Fig. 11
10 is a cross-sectional view taken along the line CC of FIG. 10, FIG. 12 is an explanatory view of deformation of a plate end portion generated by bending correction of a camber, FIG. 13 is an explanatory view of a tension leveler device, and FIG. 14 is an explanatory view of a stretcher leveler. FIG. 15 is an explanatory view of a camber straightening device similar to the present invention, and FIG. 16 is an explanatory view of a plate shape after the camber straightening according to the embodiment of FIG. 1 ... Work roll, 2 ... Rotary drive universal joint, 3
…… Material to be straightened, 4 …… Backup roller partially formed with a large diameter, 5 …… Pinion stand, 6 …… Drive motor, 7 …… Material transport roll, 8 …… Straightening vertical roll,
9 ... Mold, 10 ... Tension generator, 11 ... Tension leveler, 12 ... Chucking device, 13 ... Strip, 14 ... Bearing, 15 ... Backup roll with constant outer shape, 16 ... Axial direction Position adjustment device, 17 ... hydraulic cylinder.

Claims (1)

[Claims] 1. A backup roll is disposed in close proximity to at least one of the upper and lower sides of the work rolls that are provided relative to each other, and a large-diameter roll portion is formed at a position different from the width center of the material to be straightened in the backup roll. A camber straightening device in which the body length of the large diameter roll portion is formed narrower than the width of the material to be straightened.