KR100340351B1 - Method and apparatus for multi slit rolling - Google Patents

Abstract

Even if the drive shaft of the slit roller or its supporting frame is not enlarged, the intermediate wire rod after the division can be appropriately guided to prevent an increase in the installation cost. The multi-country slit rolling apparatus 1 of this invention is the rolling mill 3 which rolls the rough-rolled raw material 2 which has four jaw parts 6A-6D arranged in the width direction via the thin film connection part 7, and the rough rolling machine ( The first slit device 4 formed on the downstream side of 3) and dividing only one jaw portion 6A on the one end side in the width direction of the plurality of raw materials 2 from the corresponding raw material 2, and this first slit device. A second slit device 5 formed at the downstream side of (4) and simultaneously dividing the remaining three jaws 6B to 6D in which only one jaw 6A is divided, and the first and second slit devices 4 And a finishing mill for finishing rolling the intermediate wire 11 composed of the respective jaws 6A to 6D respectively divided by 5).

Description

METHOOD AND APPARATUS FOR MULTI SLIT ROLLING}

TECHNICAL FIELD The present invention relates to a multi-slit slit rolling method and apparatus for use in rolling equipment for rebar bars.

For example, as a method for efficiently manufacturing reinforcing steel bars and other crude steel for civil construction, a multi-thick material having a plurality of bar portions arranged in the width direction via a thin film connecting portion is slitted at the thin film connecting portion. The multiple-slit rolling method which divides into several intermediate wire rod and finish-rolls each intermediate wire rod is conventionally employ | adopted.

And in the case of four-row slit rolling in which a roughening part forms four roughly raw materials, the thin-film connection part of a roughening raw material is made to slit in the two positions spaced apart in the conveyance direction of the same roughening material, and is conventionally shown in FIG. Similarly, the two nail parts 6A, 6D on both sides in the width direction are simultaneously divided by the multiple nail material 2 by the slit device 4 in the first stage, and then, by the slit apparatus 5 in the second stage. The two jaws 6B, 6C in the center of the remaining width direction are divided from each other (see Japanese Patent Publication No. 2630067).

In the conventional four-row slit rolling method, the two slit portions 6A and 6D on both sides in the width direction are simultaneously divided by the slit device 4 in the first stage, so that the slit apparatus 5 in the second stage is driven. In correspondence with the format, there are the following problems.

That is, in the slit step of the first stage, when the two jaws 6A, 6D on both sides in the width direction are divided at the same time, rotation driving is performed by the drive means 22 such as a motor as the slit device 5 of the second stage. In the case of adopting a driving type having a slit roller 20 to be used, it is necessary to pass the intermediate wire 11 generated in the slit step of the first stage to the drive shaft 25 of the slit roller 20 (upper side in FIG. 4). There is.

For this reason, when the drive-type slit device 5 is employ | adopted in the 2nd stage, in order to ensure the passage space of the intermediate wire 11, the drive shaft 25 of the slit roller 20 is overhanged larger than usual. It is necessary to make the protrusion amount E large by making it hang, and in order to obtain an appropriate slit load, the said drive shaft 25 and its support frame must be enlarged, and there exists a problem that installation cost becomes high.

On the other hand, when the second stage slit device 5 adopts a free roller type that does not drive the slit roller 20, the drive shaft 25 for driving the slit roller 20 is not available. The problem does not occur.

By the way, when the free roller type slit device 5 is adopted in the 2nd stage, since the slit roller 20 does not give tension to the raw material 2, the slit apparatus 4 of the 1st stage and In order to effectively prevent the intermediate multi-thick material 12 between the second slit device 5 from being rolled up and crimped, the distance between them should be as close as possible, thereby allowing each slit device 4, Maintenance such as inspection of 5) becomes difficult to be executed.

That is, in the case where the slit roller 20 of the second stage is a freely rotatable free roller which is not rotationally driven, when the two jaws 6A, 6D on both sides in the width direction are simultaneously divided in the slit process of the first stage, Since the intermediate rough material 12 remaining after the process is rolled up and made easy to be wrinkled, which is composed of only two grandfathers 6B and 6C in the center, the intermediate rough material 12 is rolled up to form wrinkles. In order to prevent seizure efficiently, the distance between the slit devices 4 and 5 of the first stage and the second stage must be as close as possible.

The present invention has been made in view of the above situation, and when the slit device of the second stage is driven, it is possible to appropriately guide the intermediate wire rod after the splitting without increasing the drive shaft of the slit roller or its supporting frame, thereby increasing the installation cost. It aims to prevent.

In addition, when the slit device of the second stage is free roller type, even if the slit device of the first stage and the second stage are not so close to each other, the intermediate multi-thick material can be efficiently prevented from being picked up and wrinkled. The purpose is to facilitate maintenance of the device.

In order to achieve the above object, the present invention has taken the following means.

That is, the apparatus of the present invention is a rolling mill for rolling a roughened material having four roughened parts arranged in the width direction via the thin film connecting part, and only one roughened part formed on the downstream side of the rolling mill and on one end side in the width direction of the roughened material. A first slit device for dividing from the above-mentioned raw material, a second slit device formed at a downstream side of the first slit device and dividing the remaining three rough parts at the same time, in which only one of the one jaws is divided, and the first and It is provided with the finishing rolling mill which finish-rolls the intermediate wire which consists of each nail | grain part divided by the 2nd slit apparatus, respectively.

According to the above apparatus of the present invention, the thin film connecting portion of a plurality of raw materials having four nails arranged in the width direction is divided into four intermediate wires by slitting at two positions spaced apart in the conveying direction of the same plurality of raw materials, respectively. In carrying out the method of rolling the multi-slit slit which finish-rolls the intermediate wire of the wire, in the slit step of the first step, only one rough part of the widthwise one end side is divided from the raw material, and the remaining 3 in the slit step of the second step. Grandparents are divided at the same time.

In this case, since the intermediate multi-colored raw material remaining after the slit step of the first stage is a good elastic material composed of three grandfathers, the first stage and the second stage even when the free roller type is adopted as the slit device of the second stage. Even if the slit device of the stage is not so close to each other, the intermediate multi-thick material can be rolled up to effectively prevent wrinkles.

In the present invention, since only one jaw on one side in the width direction is divided from the multiple nail material in the slit step of the first stage, one intermediate wire made of the divided jaws is half of the second slit device. By inducing it to pass through the drive shaft side, when adopting a drive type as the slit device of the second stage, it is not necessary to protrude the drive shaft of the slit roller significantly, and the intermediate part after division even if the same drive shaft or its supporting frame is not enlarged. The wire rod can be properly guided to the finishing mill.

In the present invention, it is preferable that the first slit device adopts a first slit roller having a knife-cutting portion for cutting the thin film connecting portion of the multi-colored raw material and a guide protrusion jaw for guiding the multi-colored raw material to the transport direction exit side. desirable.

In this case, since the guide protrusion jaw guides the raw material to the conveying direction exit side, the three sets of intermediate multithick materials after the first step slit process can be taken upright with respect to the axis center of the slit roller, and thus can be taken straight out. The material is rolled up to effectively prevent wrinkles.

In the present invention, a drive type having a slit roller that is rotationally driven by a motor or the like can be adopted as the second slit device, and a free roller type having a slit roller that can be freely rotated can be adopted.

However, in order to effectively prevent the intermediate multi-thick material made up of the three sets of nails from being rolled up and wrinkled, it is preferable to employ an electron driven type as the second slit device.

That is, this invention is a 2nd slit roller which has two knife parts in an outer peripheral surface which cut | disconnect the thin-film connection part of a multi-colored raw material as a 2nd slit raw material, and this slit roller has a main speed faster than the conveyance speed of the said raw-colored raw material. It is recommended to employ | adopt the thing provided with the drive means which rotate-drives at low speed.

In this case, the second slit roller cuts the thin-film connection part while applying tension to the intermediate forging material having three jaws in the second slit step, so that the intermediate forging material is rolled up and wrinkled. That is definitely prevented.

1 is an overall plan view of a multi-country slit rolling apparatus according to the present invention,

2A is a cross-sectional view taken along the line A-A of FIG.

2B is a cross-sectional view taken along the line B-B of FIG. 1;

2C is a cross-sectional view taken along the line C-C of FIG.

3D is a cross-sectional view taken along the line D-D of FIG. 1;

3E is a cross-sectional view taken along the line E-E of FIG. 1;

4 is an overall plan view of a conventional multi-country slit rolling apparatus.

Explanation of symbols for the main parts of the drawings

1: multi-slit rolling device 2: multi-material

3: rolling mill 4: first slit device

5: second slit device 6A, 6B, 6C, 6D: grandfather

7: thin film connection part 8: first slit roller

10, 23, 24: knife portion 11: the intermediate wire rod

12: intermediate forged material 20: second slit roller

22: drive means 25: drive shaft

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing.

In FIG. 1, the roughening slit rolling apparatus 1 of this invention is the rolling mill 3 which rolls the roughening raw material 2, the 1st slit apparatus 4 arrange | positioned downstream, and arrange | positioned downstream. It consists mainly of the 2nd slit device 5 which was made, and the finishing rolling mill (not shown) arrange | positioned downstream.

The rolling mill 3 rolls the strip-shaped multi-colored raw material 2 which consists of a plurality of nails by a pair of upper and lower caliber rolls. The multi-colored raw material 2 of this embodiment has four nails 6A arranged side by side in the width direction. To 6D). That is, as shown in FIG. 2A, the roughened material 2 is provided with four nail parts 6A-6D arranged side by side in the width direction integrally connected via the thin film connection part 7. As shown in FIG.

In addition, in FIG. 1, the tandem mill which is the most downstream side as the rolling mill 3 is shown. That is, on the upstream side of the rolling mill 3 of FIG. 1, the several tandem rolling mill group for shape | molding the raw material 2 gradually to a predetermined cross section is arrange | positioned.

The 1st slit device 4 divides only one roughening part 6A of the width direction one end of the roughening material 2 from the said roughening material 2, The upper and lower limit arrange | positioned immediately downstream of the rolling mill 3 A pair of 1st slit rollers 8 and 8 and the 1st guide member 9 arrange | positioned downstream are provided.

As shown in FIG. 2B, the outer peripheral surface of the 1st slit roller 8 has a rough part of the width direction one side (the opposite side to the drive shaft 25 of the 2nd slit roller 20 mentioned later) in the raw material 2 One knife part 10 which cut | disconnects the thin film connection part 7 between 6A and its adjacent jaw part 6B is formed, and this one knife part 10 is one in the width direction one end side. Only the jaws 6A are divided from the multi-colored raw material 2.

That is, the upper and lower first slit rollers 8 and 8 are disposed in close proximity such that the knife portion 10 is forcibly pressed from both the upper and lower sides between the two bath portions 6A and 6B, and the wedge of the knife portion 10 is provided. By the effect, the thin film connection part 7 is divided and the same rough part 6A, 6B is mutually spaced apart.

Therefore, in the slit process of the 1st step | stage by this 1st slit device 4, only the roughening part 6A of the width direction one end side is divided | segmented into the roughening material 2 which shows one strip | belt-shaped, and the divided roughening part It isolate | separates into two members of the intermediate | middle wire rod 11 which consists of 6A, and the intermediate-structured raw material 12 which consists of remaining three nail parts 6B-6D.

In addition, the guide protrusion jaw 13 which enters into the outer peripheral surface of the 1st slit roller 8 between the tank part 6D of the width direction other end side, and the tank part 6C which adjoins it, and guides the raw material 2 to the conveyance direction exit side. ) Is integrally formed. The guide protrusion jaw 13 is formed with a diameter smaller than that of the knife portion 10, and only enters between the jaws 6C, 6D, and has no function of separating the thin film connecting portion 7 therebetween. .

Therefore, the roughened material 2 passing between the upper and lower first slit rollers 8 and 8 is divided only by the knife portion 10 in the widthwise one end portion 6A, and the remaining three nail portions ( 6B to 6D are carried out in the direction perpendicular to the axis center of the first slit roller 8 by the guide protrusion jaw 13.

Moreover, this guide protrusion jaw 13 may be formed in addition to the position corresponding to the two jaw parts 6B and 6C located in the center of the width direction, or may be formed as much as this position. Moreover, the drive type can be employ | adopted for the 1st slit roller 8 similarly to the 2nd slit roller 20 mentioned later.

The 1st guide member 9 guides the intermediate | middle wire rod 11 which consists of said one jaw 6A, and the intermediate | middle raw material 12 consisting of three jaws 6B-6D to a conveyance direction.

As shown in FIG. 3D, the first guide member 9 includes a guide cylinder 17 having a rectangular cross-sectional shape having a bottom wall 14, an upper wall 15, and left and right side walls 16. It has a movement path 18 surrounded by 14 to 16.

A pair of upper and lower guide protrusions 19U and 19L protrude from the bottom wall 14 and the upper wall 15 in the widthwise middle portion to face each other so that a gap is formed therebetween, and the upper and lower guide protrusions 19U and 19L is formed along the moving direction of the intermediate wire 11. Therefore, each guide protrusion 19U, 19L does not contact the thin film connection part 7 which remain | survives in the intermediate wire 11 and the intermediate | middle forging apparatus 12, but contacts the nail parts 6A and 6B and guides the course. .

As described above, in the present embodiment, the remaining thin film connecting portion 7 is guided without the remaining thin film connecting portion 7 contacting the upper and lower guide protrusions 19U and 19L. By depositing 7 in the guide cylinder 17, it is possible to effectively prevent the movement path 18 therein from being blocked.

As shown in FIG. 1, the 2nd slit apparatus 5 carries the intermediate | middle roughening material 12 which consists of three nail parts 6B-6D obtained by the slit process of a 1st step | paragraph, and each of those three nail parts 6B-6D. ) And a pair of upper and lower pairs of second slit rollers 20 and 20 arranged on the downstream side of the first guide member 9, and the second guide member 21 disposed on the downstream side thereof. And driving means 22 for rotationally driving the upper and lower pairs of second slit rollers 20 and 20.

As shown in FIG. 2C, two knife portions for cutting both thin film connecting portions 7 between three jaws 6B to 6D of the intermediate multi-colored raw material 12 are formed on the outer circumferential surface of the second slit roller 20 ( 23 and 24 are spaced apart in the axial center direction, and the three nail parts 6B and 6D are divided simultaneously by these two knife parts 23 and 24, respectively.

That is, the upper and lower second slit rollers 20 and 20 are arranged in such a manner that two knife portions 23 and 24 spaced apart in the axial center direction are forcibly pressed from the upper and lower sides between the three jaws 6B to 6D, respectively. By the wedge effect of these two knife parts 23 and 24, both thin film connection parts 7 are divided and the three nail parts 6B-6D are simultaneously spaced apart.

Therefore, in the second slit step by the second slit device 4, the intermediate multi-thick material 12 consisting of the three rough parts 6B to 6D is divided into the respective rough parts 6B to 6D simultaneously in the process. It is separated into three intermediate wire rods 11, respectively.

The drive means 22 includes a drive shaft 25 connected to one of the upper and lower second slit rollers 20 and 20, a support frame (not shown) for rotatably supporting the drive shaft 25, and the drive shaft 25 ) Is provided with a drive motor (not shown) connected via a material joint, and this drive motor rotates and drives the second slit roller 20 at a main speed slightly faster than the conveying speed of the material 2. Has

For this reason, in the slit process of the 2nd step | paragraph by the 2nd slit roller 20, when the thin-film connecting part 7 is slit, it is compared with respect to the intermediate raw material 12 which has three nail parts 6B-6D. Tension to the conveyance direction exit side is always imparted.

The second guide member 21 guides the three intermediate wire rods 11 after being separated by the second slit roller 20 in the conveying direction.

As shown in FIG. 3E, the second guide member 21 also includes a guide cylinder 17 having a rectangular cross-sectional shape having a bottom wall 14, an upper wall 15, and left and right side walls 16. A pair of upper and lower guide protrusions 26U, 26L, 27U, and 27L protrude in a shape opposite to each other so as to form a gap therebetween in the widthwise middle portion of the 14 and the upper wall 15. The upper and lower guide protrusions 26U, 26L, 27U, and 27L are formed along the moving direction of the intermediate wire 11.

In addition, in the case of the 2nd guide member 21, a pair of right and left are arrange | positioned in the position which this upper and lower guide protrusions 26U, 26L, 27U, and 27L fit the 6C of centers in the width direction from left to right.

Therefore, also in this 2nd guide member 21, each upper and lower guide protrusions 26U, 26L, 27U, and 27L do not contact the thin film connection part 7 which remain | survives in each intermediate wire 11, and it is a rough part 6B thru | or. By contacting 6D) and guiding the course, the remaining thin film connecting portion 7 is prevented from being deposited in the guide cylinder 17 in advance.

Next, the rolling method by the multiple nail slit rolling apparatus 1 which concerns on the said structure is demonstrated.

First, the raw material 2 from the rolling mill 3 is supplied to the 1st slit roller 8 of the 1st slit device 4, and is applied to the slit process of a 1st step | paragraph.

At this time, the knife part 10 formed in the 1st slit roller 8 slit only the thin film connection part 7 of the width direction one end side (as opposed to the said drive shaft 25), and, therefore, the slit of a 1st step | paragraph In the process, only one jaw portion 6A on one end side in the width direction is divided from the plurality of raw materials 2.

In addition, at the same time as this cutting, the guide protrusion jaw 13 formed in the first slit roller 8 enters between the jaws 6C, 6D of the plurality of raw materials 2 and guides them to the transport direction exit side. The intermediate multi-colored raw material 12 formed after the slit process is carried out upright with respect to the axial center of the said 1st slit roller.

Subsequently, the intermediate wire rod 11 composed of one divided jaw 6A and the intermediate multi-rolled material 12 composed of the remaining three jaws 6B to 6D are guided to the first guide member 9. The middle wire 11 is supplied to the finishing mill (not shown).

On the other hand, the latter intermediate multi-colored raw material 12 is supplied to the second slit roller 20 of the next second slit device 5 and applied to the slit step of the second stage.

At this time, a pair of left and right knife portions 23 and 24 formed on the second slit roller 20 simultaneously slit both thin film connecting portions 7 between the three jaw portions 6B to 6D, and the remaining three corners The rough parts 6B to 6D are divided at the same time.

In this way, the three intermediate wires 11 made of the respective jaws 6B to 6D separated from each other pass through the second guide member 21, and then consist of the jaws 6A divided in the slit step of the first stage. In addition to the intermediate wire 11, it is supplied to a finishing mill (not shown).

At this time, in the present embodiment, the second slit roller 20 is driven at a speed slightly faster than the conveying speed of the raw material 2, so that the exit direction in the conveying direction with respect to the intermediate raw material 12 in the slit step of the second stage. Since the tension to the side is always imparted, it is prevented that the intermediate multi-colored raw material 12 is rolled up and wrinkled between the slit processes of the first stage and the second stage.

In addition, in this embodiment, since the intermediate wire 11 which consists of the rough parts 6A divided | segmented at the 1st slit process is made to pass to the half drive shaft 25 of the 2nd slit roller 20, the drive shaft ( Even if 25 is not protruded greatly from the support frame of the drive means 22 or the like, the intermediate wire rod 11 (column portion 6A) after the division can be appropriately guided by a finish rolling mill.

In addition, this invention is not limited to the said Example, This invention is applicable also when the 2nd slit roller 20 is a free roller type which can be freely rotated, for example.

In this case, in the present invention, since only one jaw portion 6A on one side in the width direction is divided in the slit step of the first step, the intermediate multi-thick material 12 between the slit step of the first step and the second step is It consists of an elastic material with three nail parts 6B-6D. Therefore, even if the 2nd slit roller 20 is a free roller, it is efficient for the intermediate | middle forged material 12 to be rolled up and wrinkled, without making the distance between the slit process of a 1st stage and a 2nd stage so close. Can be prevented.

As described above, according to the present invention, when the slit device of the second stage is driven, it is possible to appropriately guide the intermediate wire rod after dividing even if the drive shaft of the slit roller or its supporting frame is not enlarged, thereby preventing the increase of the installation cost. Can be.

In addition, when the slit device of the second stage is free roller type, even if the slit device of the first stage and the second stage are not so close to each other, the intermediate multi-thick material can be effectively prevented from being wrinkled and wrinkled. Maintenance can be made easy.

Claims (5)

In the multi-slit slit rolling apparatus, A rolling mill 3 for rolling the multi-thick raw material 2 having four jaw portions 6A to 6D arranged in the width direction via the thin film connecting portion 7; A first slit device 4 formed on the downstream side of the rolling mill 3 and further dividing only one jaw portion 6A on the one end side in the width direction of the article 3 from the article 1 A second slit device 5 formed on the downstream side of the first slit device 4 and simultaneously dividing the remaining three jaws 6B to 6D in which only one jaw 6A is divided; It includes a finish rolling mill for finishing rolling the intermediate wire 11 composed of the respective jaws 6A to 6D divided by the first and second slit devices 4 and 5, respectively. Forged slit rolling device. The method of claim 1, The said 1st slit device 4 is the one knife part 10 which cut | disconnects the thin film connection part 7 of the said raw material 2, and the guide protrusion jaw 13 which guides the said raw material 2 to a conveyance direction exit side. Comprising a first slit roller 8 having Forged slit rolling device. The method according to claim 1 or 2, The said 2nd slit apparatus 5 has the 2nd slit roller 20 which has the two knife parts 23 and 24 which cut | disconnect the thin film connection part 7 of the raw material 2 on the outer peripheral surface, and the said 2nd slit roller. And driving means 22 for rotationally driving the 20 at a circumferential speed faster than the conveyance speed of the multi-colored raw material 2. Forged slit rolling device. Four intermediate wire rods are slitted respectively at two positions spaced apart in the conveying direction of the plurality of raw materials 2 by the thin film connecting portions 7 of the plurality of raw materials 2 having four jaws 6A to 6D arranged in the width direction. In the multiple-slit rolling method which divides into (11) and finish-rolls each intermediate wire 11, Dividing only one jaw portion 6A on one end side in the width direction in the first stage slit step from the above-mentioned raw material 2; In the second step of the slit process, the step of dividing the remaining three rough parts (6B to 6D) with each other at the same time, characterized in that How to roll the forged slit. The method of claim 4, wherein The thin film connection part 7 is cut | disconnected, applying tension to the intermediate | middle forging raw material 12 which has three jaw parts 6B-6D in the 2nd step slit process. How to roll the forged slit.