JPH089082B2 - Width reduction press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a width reduction press which prevents buckling of a material which is continuously fed when the material is width-reduced using a press. It is about.

[Prior Art] When a material such as a slab is width-reduced, a press capable of setting a larger reduction amount than width-rolling has been attracting attention, and research for its practical application is underway.

5 to 8 show conventional measures for preventing buckling of a material subjected to a large width reduction.
The upper and lower surfaces are held by the holding roll / pinch rolls b'and b.

In the figure, c is a pressing force adjusting device composed of a screw or a cylinder, d is a pressing die, e and f are support rolls provided on the inlet and outlet sides, g is a transport roll, and h is a support roll. Indicates the material feeding direction.

[Problems to be Solved by the Invention] However, according to the above-described conventional apparatus, since the lower pressing roll b and the supporting rolls e and f support the lower surface of the material a substantially horizontally, the material a by pressing is pressed. As the thickness of the material a increases, the material a is restrained by the rolls b, e, f from increasing the thickness on the lower surface side in the ideal cross-sectional shape shown by the phantom line in FIG. As indicated by the solid line in the figures and FIG. 8, the thickness must be increased to the upper surface side, and the material thickness direction center plane i on the press exit side is half the thickness increase Δt than the material center plane j on the entrance side. It gets expensive.

Therefore, in order to maintain a uniform reduction amount on the horizontal rolling mill (not shown) that receives this material a in the next step, the center height of the roll gap of the horizontal rolling mill is Δt from the center plane j on the press-in side. It is necessary to install the rolling mill so that it is only higher.

However, since the above-mentioned Δt fluctuates according to the change of the property of the material a and the set value of the width reduction amount, the purpose can be achieved only by adjusting the installation level of the horizontal rolling mill. It is difficult.

Further, as shown in FIG. 8, the thickened portion of the material a toward the upper surface side is strongly pressed by the upper pressing roll b ′ or the like, so that the contact portion with the roll b ′ is dented or the material a is strengthened. When the width is reduced, it is difficult for the material to flow to the center of the width, so that the dogbone portion generated at the width end is the roll b ′.
There was a problem such as corner scratches being made by interfering with the end face of the.

Further, the material a thickened to the upper surface side by the press is
Since the center plane i in the material thickness direction faces upward, the material a is subjected to a force of upward lifting. However, since the middle portion and the rear end portion of the material a are restrained by the leading portion of the material a, even if the material tries to lift upward, it is unlikely that the material a actually lifts. At the tip of a, there is nothing that restrains the material a, so it may actually warp upward.

Even if the tip of the material a is warped, if the warp grows to a certain extent, the material a is heated to a high temperature, and the material a sags due to its own weight and is substantially flattened.
If the warp is accompanied by buckling, no one will flatten it by its own weight, and as shown in FIG. 5, it will be arched in the feed direction h and cannot pass through the horizontal rolling mill in the next process. There is.

[Means for Solving the Problems] In view of the above-mentioned problems, the present invention makes it easy to accept the material of the next process equipment regardless of the change in the property of the material and the width reduction amount, and also by the contact with the roll. The purpose of this is to provide a width reduction press that does not cause scratches, and the gist thereof is to put at least the lower surface of the material 1 on the inlet side and the outlet side between the left and right press dies 3, 3 of the width reduction press. Lower support roll to support
5 and 6 are arranged such that the inlet side is high and the outlet side is low so that the center plane 2 in the thickness direction of the material 1 whose thickness is increased by width reduction is maintained at the same height level before and after width reduction. Support roll according to the thickness of 1 and the amount of reduction to material 1
Providing height adjusting devices 15, 16 that can adjust the supporting height of 5, 6,
The upper and lower presser rolls 7 and 8 that press the upper and lower surfaces of the material 1 with a strong pressing force are arranged in the intermediate portion between the support rolls 5 and 6, and the pressing force for the material 1 is changed to the upper and lower presser rolls 7 and 8. The possible pressing force adjusting devices 4, 4 ', 13, 13' are provided.

[Operation] Since the center plane 2 in the thickness direction of the pressed material 1 moves horizontally while being kept at the same level as before the pressing, it becomes easy to receive the material in the equipment of the next process, and there is no scratch during the pressing. There is no possibility of occurrence of.

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

1 and 2 show a first embodiment of the present invention, in which 1 is a material continuously fed in the feeding direction indicated by an arrow k, and 2 is a thickness direction of the material 1. The center planes 3 and 3 are a pair of left and right pressing dies that are pressed and driven in the direction of arrow 1.

Support rolls on the bottom and bottom of the press
5, 6 are arranged, a height adjusting device 15 (screw mechanism, etc.) is attached to the support rolls 5, 6, and each support roll 5, 6
The height is set to be high on the inlet side and low on the outlet side so that the material 1 having an increased thickness can be supported substantially horizontally during width reduction.

The press rolls and pinch rolls 7 and 8 (hereinafter referred to as press rolls) are provided above and below the intermediate portions of the support rolls 5 and 6, respectively.
Are arranged, and pressing force adjusting devices 4 ', 4 (screw mechanism etc.) are attached to the upper and lower presser rolls 7, 8.

In addition to the pressing force adjusting device 4 ', the upper pressing roll 7 is provided with a lateral moving device 9 (cylinder device or screw mechanism) for adjusting the position in the feed direction k.
The upper surface of the material 1 can be pressed by following the movement of the center of gravity 12 of the width reduction force distribution 14 acting on the material 1 (patent application filed on May 16, 1986 by the same inventor (Japanese Patent Application No. 61
-112131))).

The upper and lower pressing rolls 7 and 8 also play the role of pinch rolls for feeding the material 1 by being rotationally driven in the direction of arrow m by a driving device (not shown).

Next, the operation and handling procedure of this device will be described.

When the material 1 is width-reduced, in consideration of the increase in thickness corresponding to the width reduction amount, the material thickness-direction center plane 2 after width-reduction is maintained at substantially the same level as the press-insertion side thickness-direction center surface. As possible, the height of the supporting rolls 5 and 6 is adjusted so that the supporting roll 5 is high and the supporting roll 6 is low.
Adjust in advance with step 15 so that the level is maintained as it is while the width reduction is in progress.

Further, the pressing force adjusting devices 4 ', 4 enable the upper and lower pressing rolls 7, 8 to strongly press the upper and lower surfaces of the material 1 with a required pressing force. In this case, the protrusion amount of the pressing force adjusting device 4 is set so that the required pressing force acts on the material 1 when the lower pressing roll 8 is positioned at the intermediate height between the support rolls 5 and 6. .

When the material 1 is passed through the press in the above-described state, the material 1 is pressed by the pressing force adjusting devices 4 ′, 4 and the pressing rolls 7, 8 at the intermediate portion on the press-in / out side, and the width reduction force distribution 1 on the upper and lower surfaces.
Since the center of gravity 12 of 4 can be strongly pressed, there is no risk of buckling due to width reduction.

Further, the support rolls 5 and 6 whose heights are adjusted by the height adjusting device 15 so that the inlet side is high and the outlet side is low, the level of the center plane 2 in the thickness direction before and after the reduction of the material 1 does not change. It is easy to receive the material of the equipment, and since the level of the thickness center plane 2 of the material 1 is unchanged before and after the reduction, the material 1 does not receive the upward force, and the tip of the material 1 moves upward. Warping is prevented.

Further, since the position of the lower surface side of the material 1 is lowered, the amount of increase in the position of the upper surface due to the increase in the thickness is reduced, so that the upper pressing roll 7 interferes with the upper surface of the material 1 to prevent the material 1 from being scratched. To be done.

Incidentally, the center of gravity position 12 of the width reduction force distribution 14 moves in the process of width reduction in the press, but since the lateral movement device 9 moves the upper presser roll 7 in the feeding direction k to press the center of gravity position 12. (Arrow n), the upper pressing roll 7 can effectively press the material 1.

Here, the width reduction force distribution 14 is a distribution state in which the magnitude of the width reduction force acting on each point determined at a predetermined interval in the feeding direction k of the material 1 is represented by the length of the vector. And the barycentric position 12 of the width reduction force distribution 14 is the width reduction force distribution
The geometrical center position of 14 is a point at which the width reduction force is concentrated, so that the pressing position is effective for preventing buckling of the material 1.

Further, when the material 1 is width-reduced by the same amount, a larger width reduction force is required for a portion having a smaller width dimension and a portion having a larger width dimension (generally, the same thickness). Then, crushing one of width 10 with one crushing requires a larger width reduction force.) Therefore, the width dimension is smaller than the entry side with a large width dimension, The width reduction force becomes larger on the outlet side where the thickness dimension is increased, and the width reduction force distribution 14 is biased to the outlet side as shown in FIG. 2, and the center of gravity 12 also has the width reduction force distribution. The position is slightly offset from the center of 14 toward the exit side.
Further, as the range of reduction of the material 1 by the mold 3 expands during one width reduction, the width reduction force distribution 14 does not necessarily increase in a similar manner (the width 100 part and the width 50 part If you crush one by one, 50: 100 = in the first unit time
The ratio of width reduction force which was 1: 2 is 49: 99 ≠ 1: 2 in the next unit time.
Because. If the width reduction amount is the same, the width reduction force is inversely proportional to the width dimension), and the center of gravity position 12 moves every moment.

 A second embodiment of the present invention is shown in FIG.

In this example, the support rolls 5 and 5 ', the press rolls 7 and 8 and the support rolls 6 and 6'are respectively provided on the press-in side, the press-out side and the middle part of the press inward side in the thickness direction central plane. Two
Are arranged symmetrically with respect to each other, and support rolls 5, 5 ', 6,
Height adjustment devices such as height adjustment cylinders 6 '
6, 16 'are provided, the pressing rolls 7, 8 are provided with pressing force adjusting devices 13', 13 such as pressing force adjusting cylinders, and the lateral moving device 9 is removed from the upper pressing force adjusting device 13 '. Other than this, there is no difference from the first embodiment.

In this example, the roll height is adjusted by a highly responsive cylinder device in place of the screw mechanism in the first embodiment, so that the roll 5 can be swiftly followed by the increase in the thickness of the material 1 during the rolling reduction. , 5 ', 7,8,6,6' can be moved up and down, so that the level of the central surface 2 in the thickness direction before and after the reduction of the material 1 can be surely supported so as not to change. There are advantages.

The upper support rolls 5 ′ and 6 ′ guide the upper surface of the material 1 so as to lightly contact the upper surface of the material 1 or to press the upper surface of the material 1 very lightly. The function of the upper pressing roll 7 that applies a strong pressing force to the upper surface of the material 1 is different.

 A third embodiment of the present invention is shown in FIG.

This example shows the upper and lower presser rolls shown in the embodiment of FIG.
Since the lateral moving devices 9 are provided in 7 and 8, respectively, there is an advantage that the movement of the center of gravity position 12 of the rolling force can be accurately followed, and other than that, there is no difference from the second embodiment.

The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] As described above, the present invention exhibits the following excellent effects.

(I) By arranging at least the lower support rolls so that the entrance side is high and the exit side is low, the material whose thickness increases during width reduction is brought to the same level as that before the width reduction in the center plane in the material thickness direction. Since it is maintained, it is easy to receive the material of the next process equipment.

(Ii) For the same reason as in (i), the tip of the material does not warp in the feeding direction, and the upper part of the material is prevented from interfering with the upper pressing roll and causing scratches. It

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a view from the direction of II-II in FIG. 1, FIG. 3 and FIG. FIG. 6 is a side view of the present apparatus, which is a second and third embodiment of the present invention, FIG. 5 is a side view of a conventional presser roll device, and FIG. 6 is a view taken along the line VI-VI of FIG. FIG. 7 is a view on arrow VII-VII in FIG. 5, and FIG. 8 is a view on arrow VIII-VIII in FIG. In the figure, 1 is a material, 3 is a mold, 4 and 4'is a pressing force adjusting device,
5,6 are support rolls, 7,8 are presser rolls and pinch rolls, 9
Is a lateral moving device, 13 and 13 'are pressing force adjusting devices composed of pressing force adjusting cylinders, and 15, 16 and 16' are height adjusting devices.

Claims (1)

[Claims] 1. Molds (3) for the left and right of a width reduction press
The lower support rolls (5) and (6) that support the lower surface of the material (1) at least on the inlet side and the outlet side between (3) are thickened by width reduction in the thickness direction of the material (1). The inlet side is high and the outlet side is low so that the center plane (2) is maintained at the same height level before and after width reduction, and the thickness dimension of the material (1) and the amount of reduction with respect to the material (1), etc. A height adjusting device (1) capable of adjusting the supporting height of the supporting rolls (5) and (6) according to the
5) and (16) are provided, and upper and lower presser rolls (7) and (8) for pressing the upper and lower surfaces of the material (1) with a strong pressing force are provided in the intermediate portion between the support rolls (5) and (6). A width characterized in that upper and lower presser rolls (7) (8) are provided with pressing force adjusting devices (4) (4 ') (13) (13') capable of changing the pressing force applied to the material (1). Reduction press.