JP2001105026A - Device and method for leveling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve a problem that leveling is difficult to adjust and drawback that considerable skill is required in a conventional leveling device which is composed of movable rollers and fixed rollers having the same diameter and in which a method by which the strain of a material is removed by making the amount of biting on the introducing side of the material larger and adjusting the amount of biting on the drawing-out side gradually smaller is adopted. SOLUTION: The diameter of the leveling roller is made larger gradually from the introducing side of the material to the drawing-out side. The material is passed through the leveling rollers whose diameter is made larger from the introducing side to the drawing-out side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a leveling apparatus and a leveling method for straightening a metal plate such as a rolled coil or a stamped product.

[0002]

2. Description of the Related Art A metal material has a winding habit due to being wound in a coil shape, and there is a great difference between a winding start and a winding end. There is also a problem of residual stress due to uneven thermal diffusion. Residual stress is also generated when cutting a metal material, and large residual stress is generated in a cut surface when the sharpness of the slitter is not uniform or when the sharpness is reduced. Such a residual stress is extremely troublesome, which appears as a strain at the moment when a mechanical process such as a press process is performed.

As a device for correcting such a distortion of a metal plate, there is a so-called leveling device. The leveling device is configured to remove a distortion or the like of the metal plate by passing a metal plate between a plurality of rows of leveling rollers provided opposite to each other and continuously generating an alternate bending deformation. . For example, it is used to remove distortion of a coil sent to a press device or a metal molded product after press working.

A conventional leveling device has five or more movable and fixed roller arrays, and adjusts the amount of bite by moving the movable roller array relative to the fixed roller array. For example, there are a type in which the amount of engagement of each roller is adjusted as shown in FIG. 4A, and a type in which a movable roller is made into a block as shown in FIGS. 4B and 4C. Further, there is also a structure in which the movable roller row is opened as shown in FIG.

[0005]

In the conventional leveling roller, the movable roller and the fixed roller having the same diameter have a large bite amount on the introduction side of the metal material as shown in FIG. This is performed for the purpose of removing the distortion of the metal material and flattening by gradually adjusting the amount of deformation so as to gradually decrease the initial large deformation amount. However, the conventional leveling device has a drawback that it is extremely difficult to adjust the amount of deformation of the metal material because the leveling rollers have the same diameter. For this reason, as described above, due to the invisible residual stress of the metal material, there has been a problem that it cannot be corrected in principle, and distortion may appear in the product after press working. For this reason, in the conventional leveling device, the actual effect cannot be exerted unless the individual movable rollers are adjusted to finely adjust the amount of bite. Had become.

[0006]

Means for Solving the Problems In view of the above problems, the present inventor has accomplished the present invention as a result of intensive studies. In a device for straightening a metal plate by passing a metal plate between a plurality of leveling rollers arranged opposite to each other, the diameter of the leveling roller is gradually increased from an introduction side to a discharge side of the metal plate.

According to the invention of the method, in a method of straightening by passing a metal plate between a plurality of leveling rollers arranged in opposition to each other, the leveling whose diameter is gradually increased from an introduction side to an exit side is provided. The object is to pass the metal plate through a roller.

Here, the term "leveling roller" as used in this specification refers to a roller in which a plurality of rolls arranged so that their peripheral surfaces are adjacent to each other are arranged in two stages (two rows) so as to face each other. Usually, each roller in the leveling roller is forcibly rotated individually by a chain or a gear. However, a structure in which only the rollers arranged on both sides are driven to rotate, or a separate feed roller is provided to feed the metal plate may be used. In the present invention, the diameter of the leveling roller is gradually increased. In this case, in addition to gradually increasing each roller of the leveling roller, a case where one to several rolls having the same diameter are grouped as one group and the diameter is gradually increased for each group is also included.

The primary object of the present invention is to simplify the leveling adjustment. In other words, the correction principle of the leveling device is generally to gradually change the correction curvature from the introduction part to the derivation part of the material, to give continuous alternating bending deformation, and to gradually reduce the correction curvature. is there.
For this reason, by gradually increasing the diameter of the leveling roller, it is possible to perform correction by sequentially changing the correction curvature as described above without adjusting the bite amount of each roller. For example, if the peripheral surfaces on the opposite sides of the leveling roller are arranged on a parallel straight line, the biting amount can be kept constant only by performing parallel movement according to the thickness of the material. Further, if an adjusting mechanism is provided at two or four locations on the block or plate on the movable side of the leveling roller, fine adjustment can be performed to an optimal leveling position.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings.

FIG. 1 shows an example of an embodiment of a leveling device 1 according to the present invention, in which each roller 3 of a leveling roller 2 gradually increases in diameter from the introduction side to the exit side of the metal plate 4. . In addition, the upper movable roller 21 and the lower fixed roller 22 have their peripheral surfaces facing each other linearly and in parallel. In this example, the rolls 3 having the same diameter are divided into groups I to IV, and the diameter is gradually increased for each group.

The leveling device 1 includes a movable roller 21
Are moved in parallel to maximize the amount of engagement (in the case of a plate thickness of 0), the larger the diameter of the roller 3 as shown in FIG.
Inevitably, the gap between the movable roller 21 and the fixed roller 22 increases. Therefore, when a metal plate 4 having a predetermined thickness is leveled, the bending radius to be deformed gradually increases as shown in FIG. 3B, and the amount of deformation of the metal plate 4 is gradually reduced. Functions can be easily achieved.

FIG. 3 shows another example of the embodiment of the leveling device 1 according to the present invention. Each of the rollers 3 of the movable roller 21 and the fixed roller 22 is supported by an integral block 5. The leveling device 1 according to the present invention basically performs leveling of the metal plate 4 having various thicknesses only by moving the movable roller 21 up and down in parallel (in a state where the amount of bite is kept constant over the entire leveling roller). Can be performed, but provided at four locations as in this example (two in the figure, but actually provided at four corners of the movable plate 23).
The interval between the movable roller 21 and the fixed roller 22 may be finely adjusted by the elevation adjustment screw 6. Further, in this embodiment, a reverse warp roller 7 for feeding the straightened metal plate 4 straight to the exit side of the block 5 of the movable roller 21 is provided.

In the case of fine adjustment with the elevation adjusting screw 6, the leveling device 1 of the present invention only slightly changes the biting amount of the leveling roller, and the deformation amount is increased on the introduction side and reduced on the extraction side. It is done within the range which does not deviate from the technical requirements. In other words, unlike the conventional method in which the amount of deformation of the metal plate 4 is gradually reduced by changing only the amount of engagement when the same leveling roller is used as in a conventional leveler, the amount of deformation is reduced by the introduction-side small-diameter roller. This is a structure in which the maximum feature of the present invention, that is, the deformation is reduced by the large-diameter roller on the lead-out side, and the bite amount is further finely adjusted. The adjustment of the bite amount in this case is
This is the case where the amount of engagement between the introduction side and the exit side is changed, or the amount of engagement between both ends of the roller 3 is changed.

[0015]

As described above, the leveling apparatus and the leveling method according to the present invention are directed to an apparatus for straightening a leveling roller by passing a metal plate between a plurality of leveling rollers arranged so as to face each other. The metal plate is gradually increased from the leading portion to the leading portion. Further, in a method of correcting by passing a metal plate between a plurality of leveling rollers arranged in opposition to each other, by passing the metal plate through the leveling roller, the diameter of which gradually increases from the introduction portion to the lead-out portion, The straightening of the metal plate and the removal of the residual stress can be performed extremely easily without performing complicated adjustment. In addition, if a device for partially adjusting the biting amount of the leveling roller is provided, fine adjustment to an optimum leveling position can be performed according to the metal plate to be leveled. Further, the present invention has an extremely useful effect in practical use, such as making it very easy to set a fixed amount of the bite amount for each material and to restore the material when replacing the material.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a leveling device according to the present invention.

2A is a front view in which a movable roller of the leveling device of FIG. 1 is moved in parallel to maximize a biting amount, and FIG. 2B is a front view of FIG.
FIG. 5 is a front view showing a state in which a metal plate is leveled by the leveling device.

FIG. 3 is a front view showing another example of the embodiment of the leveling device according to the present invention.

4A to 4D are front views showing a conventional example of a leveling device.

FIG. 5 is a schematic front view showing a leveling method of a conventional leveling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leveling device 2 Leveling roller 21 Movable roller 22 Fixed roller 23 Movable plate 3 Roller 4 Metal plate 5 Block 6 Elevation adjustment screw

Claims (7)

[Claims] An apparatus for straightening by passing a metal plate between a plurality of leveling rollers arranged in opposition to each other,
A leveling device wherein the diameter of the leveling roller is gradually increased from the introduction side to the exit side of the metal plate. 2. The leveling apparatus according to claim 1, wherein the plurality of leveling rollers have the same diameter, and the diameter is gradually increased for each group. 3. The leveling device according to claim 1, wherein the leveling roller has a peripheral surface on a side facing the linear position. 4. The leveling device according to claim 1, wherein each of the leveling rollers has a roller supported by an integral block. 5. A method of straightening by passing a metal plate between a plurality of leveling rollers arranged in opposition to each other,
A leveling method comprising passing the metal plate through the leveling roller, the diameter of which gradually increases from the introduction side to the exit side. 6. The leveling method according to claim 5, wherein the plurality of leveling rollers have the same diameter, and the diameter is gradually increased for each group. 7. The leveling method according to claim 5, wherein the peripheral surfaces of the leveling rollers on the side facing each other are located on a straight line.