JP3330292B2 - Guide device for multi-slit rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for a multi-slit rolling mill in a reinforcing bar rolling mill.

[0002]

2. Description of the Related Art As this kind of multi-slit rolling mill,
For example, Japanese Patent Publication No. 56-25881, Japanese Patent Publication No. 2-2
No. 1882, JP-A-4-100603 and JP-A-6-87007 are known. In these conventional products, one multi-row material formed by connecting parallel strips at a thin-walled connection portion is divided from the connection portion and formed into a plurality of intermediate steel bars, followed by finish rolling. .

[0003] As shown in FIG. 8, in the conventional multi-slit rolling mill, the divided intermediate steel bar 30 is guided downstream by a guide device 31. The guide device 31 is formed with a guide path defined by a partition wall 32, and reliably separates and guides the intermediate steel bar 30.

[0004]

In the guide device 31 of the conventional multi-slit rolling mill, the intermediate strip steel 3
There is a problem that the tip of the connection portion 33 remaining at zero contacts the partition wall 32, and burrs adhere to the partition wall 32, and the burrs gradually increase, preventing passage of the leading end of the succeeding material. In particular, burrs are likely to occur at the front end of the entrance of the partition wall 32, which has been a major cause of misrolling in slit rolling.

Conventionally, a guide device has been regularly checked to confirm the progress of burr generation, and burrs have been removed or a partition wall has been replaced. However, this maintenance could not be performed during the operation, and the repair work was very troublesome. Therefore, an object of the present invention is to provide a guide device that prevents generation of burrs and can reliably guide an intermediate steel bar.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the feature of the present invention is that a single multi-strip material formed by connecting parallel strips at a thin connection portion is divided from the connection portion by a slit device and formed into a plurality of intermediate strip steel materials. In the guide device for guiding the intermediate steel bar to the finish rolling mill side of the multi-slit rolling device that finishes and rolls after finishing, it does not contact the connecting portion remaining in the intermediate steel bar, but does The guide projection that guides the course is provided in the intermediate steel bar moving path.

[0007] In the present invention, since there is no partition wall as in the prior art, there is no contact with the connecting portion of the intermediate steel bar, and no burr is generated. Then, since the intermediate steel bar is guided and guided by the guide projection, the moving path is ensured. In addition, the multi-slit rolling device includes a first slit device that divides connection portions on both left and right sides of one multi-strand material, and is disposed downstream of the first slit device, and has a connection portion at a central portion. It is preferable to have a second slit device for dividing, and the guide device is arranged between the first slit device and the second slit device. It is preferable that the guide projections are provided so as to face each other up and down.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the multi-slit rolling mill is composed of a strip rolling machine 1, a slitting machine 2 arranged downstream thereof, and a finishing mill (not shown) arranged further downstream thereof. I have.

The strip rolling machine 1 is for rolling one multi-strip material 3. In this embodiment, the multi-strip material 3 is used.
Has four strips 4 arranged in parallel. The multiple material 3
Is formed by connecting the parallel strips 4 integrally by a thin connecting portion 5. The slitting device 2 includes a first slitting device 6 disposed immediately downstream of the strip rolling mill 1;
And a second slit device 7 arranged on the downstream side. Further, a guide device 8 is arranged between the first slit device 6 and the second slit device 7.

The first slit device 6 divides the strip portion 4 from the connection portions 5 on both right and left sides of the multi-row material 3.
The first slit device 6 is provided with a free roller 9 which is freely rotatable.
The roller 9 is pushed in between the strips 4 from both sides in the vertical direction to separate the strips 4 by the wedge effect and to tear the connecting portion 5. The first slit device 6 divides one multi-strip material 3 into three pieces, an intermediate strip steel material 10 on the left and right sides and an intermediate strip steel material 11 at the center. The center intermediate steel member 11 has two strips 4 connected by a connecting portion 5.

The guide device 8 guides and guides the three intermediate steel strips 10 and 11 to the downstream side, and has a guide body 12. The guide body 12 includes a bottom wall 13 and an upper wall 1.
4 and left and right side walls 15 and each of these walls 1
It has an intermediate steel material movement path 16 surrounded by 3, 14, and 15. A guide projection 17 is provided to protrude from the central portion in the left-right direction of the bottom wall 13 and the upper wall 14 in a facing manner. The guide projection 17 is formed along the moving direction of the intermediate steel bar 11. The guide projections 17 do not contact the connecting portions 5 remaining on the strips 4 of the intermediate steel strips 10 and 11,
It contacts the ridges 4 and guides the course.

In the present invention, since there is no partition wall as in the prior art, there is no contact with the connecting portion 5 of the intermediate steel strips 10 and 11, and no burr is generated. And
Since the middle intermediate steel member 11 is guided and guided by the guide projection 17, the moving path is ensured. Since the left and right intermediate steel strips 10 are pushed to the left and right sides by the free rollers 9, they come into contact with the left and right side walls 15 of the guide body 12, so that they can be reliably connected to the guiding trough (not shown) on the rear surface. You will be guided.

The second slit device 7 divides the two intermediate steel strips 11 into two, and has a slit roll 18 driven by a motor. Similarly to the free roller 9, the slit roll 18 is pushed in between the strips 4 from both sides in the vertical direction, and separates the strips 4 by the wedge effect.
Is to tear.

In this manner, the four intermediate steel strips 10, 11 divided into the respective strips 4 are guided troughs (not shown).
, And supplied to a finishing mill (not shown) for finish rolling. FIG. 3 shows another embodiment, in which a guide projection 17 of a guide body 12 is provided with a middle steel strip 11 at a central portion.
And a pair of upper, lower, left and right sides are provided to guide the left and right sides.

FIG. 4 shows a guide projection 17 of a middle steel strip 11 at the center in the case of a multi-row material 3 having six strips 4. What is shown in FIG. 5 is a guide projection 17 of the intermediate steel strip 11 of the multi-row material 3 having the three strips 4. In each of the above embodiments, the vertically opposed guide projections 17 are shown, but in the present invention, either the lower or upper guide projections may be used. Although the guide projections are illustrated as being integrally formed from the respective walls, they may be detachably fixed to a body separate from the bottom wall or the top wall.

[0016]

6 and 7 show an embodiment of the present invention. Components having the same configuration as the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. A first slit device 6 is provided on the exit side of the final strip rolling mill 1 of the group of rough rolling mills for rolling the multiple strip material 3. The first slit device 6 has a pair of upper and lower free rollers 9. A guide device 8 according to the present invention is disposed on the exit side of the first slit device 6.

On the exit side of the guide device 8, a first guiding trough 20 for guiding the three intermediate steel bars 10, 11 respectively.
Is arranged. The second slit device 7 is arranged on the exit side of the trough 20 at the center of the first guiding trough 20. The second slit device 7 has a pair of upper and lower slit rolls 18 driven by a motor. The second
A second guiding trough 21 is disposed on the exit side of the slit device 7. A finishing mill group (not shown) is arranged on the exit side of the second guide trough 21.

[0018]

According to the present invention, since there is no partition wall as in the prior art, there is no contact with the connecting portion of the intermediate steel bar, and no burr is generated. Then, since the intermediate steel bar is guided and guided by the guide projection, the moving path is ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line AA of FIG.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention.

FIG. 6 is a plan view showing an embodiment of the present invention.

FIG. 7 is a side view of FIG. 6; It is a top view.

FIG. 8 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Strip rolling machine 2 Slit device 3 Multi-row material 4 Strip portion 5 Connection portion 6 First slit portion 7 Second slit portion 8 Guide device 10 Left and right intermediate strip steel 11 Central middle strip steel 16 Intermediate strip steel moving path 17 Guide Protrusion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 62-96908 (JP, U) JP 2-21882 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 39/14 B21B 1/16

Claims (3)

(57) [Claims] 1. A multi-section material comprising a plurality of intermediate strips formed by connecting a plurality of intermediate strips by connecting a parallel strip section at a thin connection section, forming the plurality of intermediate strip steel pieces from the connection section by a slit device. In a guide device that guides the intermediate strip steel material to the finish rolling mill side of the strip slit rolling device, does not contact a connection portion remaining in the strip portion of the intermediate strip steel material,
A guide device for a multi-slit rolling mill, wherein a guide projection that contacts a strip portion and guides the course thereof is provided in the intermediate strip steel material movement path. 2. A multi-slit rolling device, comprising: a first slit device that divides a connection portion on both left and right sides of one multi-strip material; and a first slit device that is disposed downstream of the first slit device and has a central portion. 2. A second slit device for dividing a connecting portion, wherein the guide device is disposed between the first slit device and the second slit device. 3.
A guide device for the multi-slit rolling mill as described above. 3. The guide device for a multi-slit rolling mill according to claim 1, wherein the guide projections are provided as a pair of upper and lower portions facing each other.