JP3224045B2 - Width reduction press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a width reduction press device, and more particularly to a width reduction press device for reducing the width of a slab material using a press.

[0002]

2. Description of the Related Art As a device for adjusting the width of a slab material, a width reduction roll device and a width reduction press device have been conventionally used. Among these, the width reduction press device (slab sizing press device) has a large contact length between the mold and the slab, and the width reduction is performed with this long contact length. There is utility that a reduction amount can be obtained. For this reason, means for producing a strip (rolled material) by combining a width reduction press with a horizontal rolling facility has been conventionally used.

[0003]

However, when a large width reduction is performed using a width reduction press device, for example, FIG.
As shown in (1), the upper and lower surfaces of both sides may be deformed into a swelling shape (referred to as a dog bone), and small projections 2 may be formed above and below both ends of the slab material 1 whose width has been reduced.
Such a projection is a sharp chevron of about 3 to 5 mm, and when this projection 2 is rolled as it is, as shown in FIG. 2 (B), a defect 3 is formed on the upper and lower surfaces slightly inside from both ends of the slab. During the subsequent horizontal rolling, the defective portion 3 remains on the upper and lower surfaces of the slab, leaving seam flaws on the upper and lower surfaces of the product (strip). These seam flaws remain continuously at a constant pitch on the upper and lower surfaces of the strip, and have problems such as deterioration in elongation characteristics during press molding and damage to the appearance by leaving flaws on the surface of the final product. In order to solve such problems, conventionally, for example, a "die for continuous width reduction press of hot slab" (Japanese Patent Publication No. 4-33521), "a method and an apparatus for forming a width reduction material by pressing"
(JP-A-63-149001) and the like have been proposed. In the former invention of Japanese Patent Publication No. 4-33521, as shown in FIG. 3, a trapezoidal caliber groove is provided in a die 4 to be reduced in width, and upper and lower portions of both ends of the slab are formed by the inclined surface of the caliber groove. Is formed inward to prevent the occurrence of the above-mentioned projections. However, with such a means, the thickness of the slab changes greatly due to the width reduction of the slab 1, so that it is difficult to match the center height of the slab placed on the roller with the center height of the mold having the caliber grooves. There was a problem. The latter invention disclosed in JP-A-63-149001 is disclosed in FIG.
As shown in the figure, an edger roll 5 having an arcuate roll surface is provided separately from a die for the width reduction press, and both ends of the slab 1 are formed inward by the edger roll to prevent the occurrence of a projection. . However, such means has a problem that when the thickness of the slab 1 is large, the rolling force of the edger roll becomes considerably large in order to form the slab end face into an arc shape over the entire thickness. The present invention has been made to solve the above-mentioned problems. That is, a first object of the present invention is to respond to a change in the height of a slab, and without requiring a large rolling force, without projecting portions above and below both ends of the slab, An object of the present invention is to provide a width reduction press device in which seam flaws are not formed on upper and lower surfaces. On the other hand, in the conventional width reduction press device, in order to guide the width-reduced slab, for example, as shown in FIG. 5, the width of the slab 1 width-reduced to the downstream side of the width reduction mold 4 is slightly larger than the width of the slab 1. Interval (for example, 50m per side)
m), a side guide 6 fixed at a distance was provided. However, since the amount of deformation of the slab 1 at the time of width reduction does not completely match on both sides, the width-reduced slab normally bends to the left or right (up and down in the figure). There is a problem that the slab conveyance power is increased due to the frictional resistance between the slab 1 and the side guide 6 when pressed. In addition, since the side guides were severely worn, they had to be replaced frequently. The present invention has been made to solve the above-mentioned problems. That is, a second object of the present invention is to provide a width reduction press device provided with a slab guide device having a small slab conveyance resistance and a small wear.

[0004]

According to the present invention, a contact position is provided on the entry side of the width reduction press die (4) and abuts against both side surfaces of the slab (1). and can be opened and closed between a remote disengaged position in the width direction, and provided with a caliber groove (12), a vertical pair of elevatable in the vertical Ejjaroru (10), the exit side of the press die for width reduction
And a pair of vertical pinch rolls (20) that are in contact with both side surfaces of the slab and allow the slab whose width has been reduced during the width reduction of the slab to move in the width direction. A width reduction press is provided. According to a preferred embodiment of the present invention, said edger roll (10) comprises:
A straight groove bottom (12a) shorter than the thickness of the abutting slab;
It has a trapezoidal caliber groove (12) composed of inclined surfaces (12b) provided on both sides of the groove bottom, and is raised and lowered so that the center height of the groove bottom matches the center height of the slab. The pinch roll (20) is controlled so as to move in the width direction opposite to the direction in which the slab whose width has been reduced during the width reduction of the slab moves.

[0005]

According to the configuration of the present invention, a pair of vertical edges is provided.
Jaror(10)But trapezoidal caliber groove(12)To
Is provided so that it can be moved up and down.
The height of the slab changes due to the
Even if the center height of the slab is changed,
Up and down the edger roll to slab its center height
Height can be adjusted. Also,Press for width reduction
Provided on the entry side of the mold (4)Edger roll(10)
When the both ends of the slab are molded inward, when the width is reduced
Inconvenient projections that may cause defects in the future
No defects occur in the rolled material during the next horizontal rolling
No. Moreover, a trapezoidal caliber groove(12)Because
Even if the slab is thick,
There is no need to form with an edger roll,
Since only the barrel is formed, the rolling force of the edger roll
Is small. Therefore, it is possible to respond to changes in slab height.
End of the slab without the need for large rolling forces
The occurrence of upper and lower protrusions and the resulting strip after rolling
The formation of seam flaws can be prevented. In addition,
According to the configuration of Ming, a pair of vertical pinch rolls(20)
But the width reduction press moldOn the exit sideProvided, both slabs
The slab that abuts against the side and is reduced in width during slab width reduction
It can be moved in the width direction, so when the width is reduced
Even when the slab deformation is different on both sides,
By moving the slab in the width direction,
The bend of the love can be prevented.AlsoSuch sla
The widthwise movement of the element during the width reduction, that is, plastic deformation occurs
Slab with relatively small force
Can be moved. The vertical pinch roll is
As it rotates (rotates) while in contact with the slab,
Low contact resistance with pinch roll, slab transfer power
Can be considerably reduced. Plus, slabs are always
Because it is sent almost straight, the force acting on the pinch roll
Is small and the pinch roll wear is very low.

[0006]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a width reduction press device according to the present invention, wherein FIG.
It is sectional drawing in the AA of (A). In FIG. 1, a width reduction press device (slab sizing press device) according to the present invention includes a trapezoidal caliber groove 12 and a pair of vertical edger rolls 10 that can move up and down in a vertical direction. The trapezoidal caliber groove 12 is used to
And a slope 12b provided on both upper and lower sides of the groove bottom 12a. At the lower part of the vertical edger roll 10, as shown in FIG.
A vertical hydraulic cylinder 14 and the like are provided so that the vertical edger roll 10 can be moved up and down. The hydraulic cylinder 14 raises and lowers the edger roll 10 so that the center height of the groove bottom 11 matches the center height of the slab 1. The vertical edger roll 10 is provided on the entry side of the width-pressing press die 4 and, for example, a horizontal hydraulic cylinder 16 or the like makes contact with both sides of the slab 1 and both sides of the slab. It is provided so as to be able to open and close in the width direction between a detached position away from the surface. The edger roll 10 may be a driving roll or a non-driving roll, but is preferably a driving roll. With this configuration, even if the thickness of the slab changes due to the width reduction of the slab and the center height of the slab placed on the roller changes, the edger roll having the caliber groove is raised and lowered to make the center height the slab height. It can be adjusted.
In addition, when the edges of the slab are formed inward by this edger roll, no inconvenient projections may occur in the future when the width is reduced, and defects will occur in the rolled material during horizontal rolling in the next act. Does not occur. In addition, since the slab is a trapezoidal caliber groove, even when the slab has a large thickness, it is not necessary to form the entire slab with an edger roll, and only the portion where the inclined surface comes into contact is formed. Therefore, it is possible to cope with a change in the height of the slab, and to prevent the occurrence of protrusions above and below both ends of the slab and the formation of seam flaws in the strip after rolling without requiring a large rolling force. Can be.

The width reduction press device (slab sizing press device) shown in FIG. 1 further includes a pair of vertical pinch rolls 20 capable of moving the slab 1 whose width has been reduced during the width reduction of the slab 1 in the width direction. Have. This width reduction press device is provided on the exit side of the width reduction press die 4, and is capable of rotating while abutting on both side surfaces of the slab 1. The pinch roll 20 may have a caliber groove similar to the edger roll 10, but is not limited to this. As shown in FIG. 1A, the pinch roll 20 is provided with a horizontal hydraulic cylinder 22 and the like so that the vertical pinch roll 20 can be moved in the width direction. The hydraulic cylinders 22 are used in synchronization with each other to control the slab 1 to move in the width direction opposite to the direction in which the slab 1 whose width has been reduced during the width reduction of the slab 1 moves. With such a configuration, even when the deformation amount of the slab at the time of the width reduction is different between the two sides, the slab is moved in the width direction during the width reduction, thereby preventing the slab having the width reduced from bending. Such movement of the slab in the width direction is performed at the same time as the width is being reduced, that is, when plastic deformation occurs, so that the slab can be moved with a relatively small force. Further, since the vertical pinch roll rotates (rotates) while being in contact with the slab, the contact resistance between the slab and the pinch roll is small, and the slab conveyance power can be considerably reduced. In addition, since the slab is always fed almost straight, the force acting on the pinch roll is small and the wear of the pinch roll is very small.

[0008]

As described above, according to the present invention, the edger roll can be moved up and down even if the thickness of the slab changes due to the width reduction of the slab and the center height of the slab placed on the roller changes. The center height can be adjusted. Also,
With the edger roll having the trapezoidal caliber groove, both ends of the slab can be formed inward to prevent the occurrence of a projection. Further, since the trapezoidal caliber groove is used, only the portion where the inclined surface contacts is formed, so that the rolling force of the edger roll is small. Therefore, it is possible to cope with a change in the height of the slab, and to prevent the occurrence of protrusions above and below both ends of the slab and the formation of seam flaws in the strip after rolling without requiring a large rolling force. Can be. Furthermore, according to the present invention, even when the amount of deformation of the slab during width reduction is different on both sides, the slab is moved in the width direction during width reduction, thereby preventing bending of the width-reduced slab. . Such movement of the slab in the width direction is performed at the same time as the plastic deformation occurs, so that the slab can be moved with a relatively small force. Further, since the pinch roll rotates (rotates) while being in contact with the slab, the contact resistance between the slab and the pinch roll is small, and the slab conveyance power can be considerably reduced. In addition, since the slab is always sent almost straight, the force acting on the pinch roll is small,
Wear of the pinch rolls is also very low.

Therefore, in summary, according to the present invention, it is possible to cope with a change in the height of the slab, no large rolling force is required, no projections are formed above and below both ends of the slab, and after rolling, A width reduction press device provided with a slab guide device in which seam flaws are not formed on the upper and lower surfaces of the strip, the slab conveyance resistance is small, and the wear is small.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a width reduction press device according to the present invention.

FIG. 2 is a schematic diagram showing a conventional slab cross-sectional shape after width reduction.

FIG. 3 is a schematic view (A) of a conventional width reduction die having a caliber groove and a cross-sectional view taken along line AA of FIG.

FIG. 4 is a schematic view of a conventional edger roll having a circular roll surface.

FIG. 5 is a schematic view of a conventional width reduction press having a side guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slab material 2 Protrusion part 3 Defect part 4 Width reduction die 5 Edger roll 6 Side guide 10 Vertical edger roll 12 Caliber groove 12a Straight groove bottom 12b Inclined surface 14, 16 Hydraulic cylinder 20 Vertical pinch roll 22 Hydraulic cylinder

Continuation of the front page (72) Inventor Setuma Matsunuma 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd. Yokohama No. 2 Factory (56) References JP-A-3-238101 (JP, A) Opened 62-134108 (JP, A) Opened open 62-96943 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 15/00 B21B 1/02

Claims (3)

(57) [Claims] 1. A width direction between a contact position provided on an entrance side of a width reduction press die (4) and contacting both side surfaces of a slab (1) and a separation position separated from both side surfaces of the slab. an openable and closable manner, and provided with a caliber groove (12), and a pair elevatable in the vertical direction vertical Ejjaroru (10), provided on the outlet side of the press die for width reduction, those on both sides of the slab A pair of vertical pinch rolls (2) that are capable of moving in the width direction the slab whose width has been reduced during the width reduction of the slab.
(0) . 2. The edger roll (10) has a trapezoidal caliber groove ( 12) comprising a straight groove bottom (12a) shorter than the thickness of the abutting slab and inclined surfaces (12b) provided on both sides of the groove bottom. The width reduction press apparatus according to claim 1, further comprising ( 12) , wherein the center height of the groove bottom is raised and lowered so as to coincide with the center height of the slab. Wherein the pinch rolls (20), slabs width reduction in the width reduction of the slab is controlled so as to move in the width direction of the direction opposite to the movement, that in claim 1, wherein The width reduction press device as described in the above.