KR101528350B1

KR101528350B1 - Jig for adjusting groove of roll and method of arraying rolls for manufacturing steel bar having screwed rib using the same

Info

Publication number: KR101528350B1
Application number: KR1020140027418A
Authority: KR
Inventors: 김정민; 박무현; 정진태; 김대선; 김기원
Original assignee: 동국제강 주식회사
Priority date: 2014-03-07
Filing date: 2014-03-07
Publication date: 2015-06-11

Abstract

The present invention relates to a jig to match ribs of a screw rebar and a method of arraying rolling rolls to manufacture a screw rebar using the same, which may accurately and easily match shaped grooves and spiral grooves of a rolling roll to manufacture a screw rebar. According to an embodiment of the present invention, a jig to adjust ribs of a screw rebar comprises body parts and rib parts. The body parts have each diameter corresponding to a screw rebar to be produced, and are formed with a predetermined length to be inserted into the grooves of an upper rolling roll and a lower rolling roll. The rib parts are formed in the body part, having each spiral shape to corresponding to the ribs of the screw rebar to be produced, and are inserted into the spiral grooves formed on the shaped grooves of the upper rolling roll and the lower rolling roll.

Description

Technical Field [0001] The present invention relates to a jig for use in screw rebar assembly, and a method for aligning a rolling roll for manufacturing a screw bar using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for screw reinforcement joints and a method for aligning a rolling roll for manufacturing a screw reinforcement using the jig, And more particularly, to a method of aligning a rolling roll for manufacturing a steel bar.

Generally, reinforcing bars are long thin steel bars that are woven into concrete and are used to reinforce the structure. These rebars are made of carbon steel or carbon alloy steel.

The reinforcing bar is divided into a circular reinforcing bar having no nodule on the outer circumference and a deformed reinforcing bar having a nodule and a rib formed on the outer circumference.

The deformed reinforcing bars are more adhesive to the concrete than the circular reinforcing bars, and have the advantage of reducing the cracks when the concrete is cracked. The deformed reinforcing bars can be classified into bamboo type steel reinforcing bars and fishbone type steel reinforcing bars depending on the shape of the ribs.

Fig. 1 is an exemplary view showing a bamboo type general reinforcing bar, and Fig. 2 is an example showing a mechanical bonding example of a bamboo type general reinforcing bar.

1, the bamboo type general reinforcing bar 10 includes a rib 12 formed on the outer peripheral surface of the reinforcing bar body 11 in the longitudinal direction of the reinforcing bar body 11, And a knurl 13 formed on the outer circumferential surface in a circumferential direction. A plurality of the ribs 12 and the nodoids 13 are formed to reinforce the strength of the reinforcing bar body 11.

The normal reinforcing bars 10 are connected to each other as needed. As shown in FIG. 2, the reinforcing bars 10 are connected to each other by a coupler 20.

In this case, the coupler 20 has a screw thread 21 formed therein. In order to connect the normal reinforcing bar 10 to the coupler 20, a thread 15 is formed on one end of the normal reinforcing bar 10. To this end, one end of the normal reinforcing bar 10 is subjected to a rolling process for removing the rib 12 and the bar 13, and then a thread rolling process is performed to form a thread.

As described above, in the case of the ordinary reinforcing bar 10, in order to connect the reinforcing bars 10 to each other using the coupler 20, a post-process is required to form the thread 15 at one end of the reinforcing bar body 11, There is an increasing problem.

4 is a view showing an example of a mechanical connection of a fishbone type screw reinforcement, and FIG. 5 is a view showing an example of a conventional fishbone type screw reinforcement manufactured Fig. 2 is an exemplary view schematically showing a rolling roll of a rolling mill.

3 to 5, the fishbone-type screw bar 30 has a reinforcing bar body 31 and a bar 32 formed in a spiral shape on the outer surface of the reinforcing bar body 31. As shown in Figs.

The screw reinforcement 30 is manufactured through the rolling roll 40 and the nod 32 is formed by being pressed while passing through the upper roll 41 and the lower roll 42 of the rolling roll 40.

The lower nod 34 formed at the lower portion of the reinforcing bar body 31 is formed by the upper roll 41 and the lower nod 34 formed at the upper portion of the reinforcing bar body 31, .

Since the formed nod 32 itself can act as a thread, it can be directly coupled to the thread 51 of the coupler 50 without any additional finishing, The effect of shortening or the like may occur.

It is most important that the nod 32 is continuously formed on the reinforcing body 31 in order to allow the nod 32 to act as a screw thread in the fishbone type screw reinforcement 30. That is, it is important that the upper and lower nodes 33 and 34 coincide with each other so that the nodes 32 are formed in a continuous shape.

If the upper and lower nodes 33 and 34 do not coincide with each other, the nod 32 can not be continuously formed and can not act as a screw thread and can not be fastened to the thread 51 of the coupler 50, The central portion of the reinforcing bar 30 that is mainly managed is the coincident management of the upper and lower nodes 33 and 34. An accurate setting of the upper roll 41 and the lower roll 42 is necessary to make the upper and lower knots 33 and 34 coincide with each other.

However, the operation of setting the rolling roll 40 so that the mold grooves 43, 44 and the helical grooves 45, 46 of the upper roll 41 and the lower roll 42 are aligned with each other is the sense of the operator, It was done based on the viewpoint of the worker. That is, the operator sets the rolls 41 and 42 while rotating or rotating while visually checking the mold grooves 43 and 44 and the spiral grooves 45 and 46 of the upper roll 41 and the lower roll 42.

However, there is a limitation in calibrating the molds 43, 44 and the helical grooves 45, 46 of the upper roll 41 and the lower roll 42 so as to be precisely matched with the human visual sense. Therefore, the settings of the mold grooves 43, 44 and the spiral grooves 45, 46 of the upper roll 41 and the lower roll 42 are changed depending on the operator, Standard work was not possible.

Even if the operator judges that the worker has correctly set the mold grooves 43 and 44 and the spiral grooves 45 and 46 of the upper roll 41 and the lower roll 42 to coincide with each other, considerable time and effort . That is, the operator visually aligns the mold grooves 43, 44 and the spiral grooves 45, 46 of the upper roll 41 and the lower roll 42, and then performs rolling to check the shape of the rolled product And the process of setting the rolling roll again was repeated when the nodule shape was abnormal. As described above, the method based on the visual sense of the worker proceeds while trying and error, which leads to a problem that the productivity is lowered.

Further, if such a steel bar is produced using a roll that has not been accurately calibrated, it is difficult to secure the quality of the produced screw reinforcement, and problems such as weakening of the coupling strength with the coupler occur. And the recovery rate is lowered.

In order to solve the above problems, a technical problem to be solved by the present invention is to provide a jig for screw and bar reinforcement that can easily match the groove and the spiral groove of the rolling roll for manufacturing screw reinforcement, and a rolling roll Thereby providing an alignment method.

According to an aspect of the present invention, there is provided an apparatus for manufacturing a steel sheet, comprising: a body portion having a predetermined diameter with a diameter corresponding to a screw reinforcement to be produced and inserted into grooves of an upper rolling roll and a lower rolling roll; And a nip portion formed in a spiral shape on the body portion so as to correspond to the nip of the screw bar to be produced and inserted into a spiral groove formed in a groove of the upper rolling roll and the lower rolling roll, to provide.

In one embodiment of the present invention, the body portion and the nodal portion may be integrally formed.

In one embodiment of the present invention, the body portion and the nodal portion may be made of a synthetic resin or a metal material.

According to another aspect of the present invention, there is provided a method of manufacturing a steel bar according to an embodiment of the present invention, comprising the steps of: a) forming a body having a predetermined length with a diameter corresponding to a steel bar to be produced, The upper rolling roll and the lower rolling roll are moved in the axial direction so that the jig for screwing the screw reinforcement including the nail formed in a spiral shape on the body portion is inserted into the grooves of the upper rolling roll and the lower rolling roll, Aligning the position; b) coupling the nose portion to a spiral groove formed in a groove of the upper rolling roll and the lower rolling roll; c) fixing the upper rolling roll and the lower rolling roll; And d) separating the interval between the upper rolling roll and the lower rolling roll, and separating the jig for screwing the screw reinforcing bar.

In one embodiment of the present invention, in the step (b) of joining the nose portion to the helical groove, the upper rolling roll or the lower rolling roll is rotated and the jig for screw- So that the nodal portion is coupled to the helical groove.

In one embodiment of the present invention, in the step (d) of separating the jig for screw and bar reinforcement, the upper rolling roll may be moved upward by an adjusting force of the roll gap adjusting valve.

According to an embodiment of the present invention, there is provided a barrel having a body portion formed with a predetermined length with a diameter corresponding to a screw reinforcement to be produced, and a barrel portion formed in a spiral shape on the body portion to correspond to a barrel The jig for screwing the screw reinforcing bars is engaged with the grooves and the spiral grooves of the upper and lower rolling rolls to set the upper rolling roll and the lower rolling roll. Therefore, the time required for setting the rolling roll can be shortened and the productivity can be improved.

Further, according to the embodiment of the present invention, since the setting accuracy of the mold groove and the spiral groove of the upper rolling roll and the lower rolling roll can be improved, it is possible to secure a good quality of the manufactured screw reinforcement, It is possible to obtain an operational improvement effect such as an improvement in the recovery rate.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an ordinary reinforcing bar of bamboo type.
Fig. 2 is an exemplary view showing a mechanical joint example of a bamboo-type general steel bar. Fig.
3 is an exemplary view showing a fishbone type screw bar.
4 is an exemplary view showing an example of a mechanical connection of a fishbone-type screw reinforcement.
5 is a schematic view showing a rolling roll of a rolling mill for manufacturing screwbones of the conventional fishbone type.
FIG. 6 is a perspective view illustrating a jig for screw and bar reinforcement according to an embodiment of the present invention. FIG.
FIG. 7 is an exemplary view illustrating an example of aligning the grooves of the rolling roll for manufacturing a screw bar using the jig for screw-bar reinforcing according to an embodiment of the present invention.
8 is a view illustrating an example of aligning a spiral groove of a rolling roll for manufacturing a threaded reinforcing bar using a jig for screw and bar reinforcement according to an embodiment of the present invention.
FIG. 9 is a flowchart illustrating a method of aligning a rolling roll for manufacturing a steel bar using a jig for screw reinforcing bar joint according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6 is a perspective view of a jig for screw reinforcement joints according to an embodiment of the present invention. FIG. 7 is a cross-sectional view of a jig used for screw reinforcement joints according to an embodiment of the present invention. FIG. 8 is an exemplary view showing an example of aligning a spiral groove of a rolling roll for manufacturing a threaded reinforcing bar using a jig for screw-and-reinforced bar joint according to an embodiment of the present invention, and FIG. FIG. 4 is a flowchart illustrating a method of aligning a rolling roll for manufacturing a steel bar using a jig for screw and bar reinforcement according to an embodiment of the present invention. FIG.

As shown in FIGS. 6 to 9, the screw reinforcement joint jig 100 may include a body portion 110 and a nod 120.

The body portion 110 may have a predetermined length with a diameter corresponding to the screw reinforcement to be produced. The body portion 110 may be inserted into the grooves 211 and 221 of the upper rolling roll 210 and the lower rolling roll 220 of the rolling roll 200 for manufacturing a screw bar.

The nod 120 may be formed in a spiral shape on the body 110 so as to correspond to the nod of the screw thread to be produced. The nod 120 may be integrally formed with the body 110.

The nod 120 is formed on the upper and lower rolling rolls 210 and 220 when the body 110 is inserted into the grooves 211 and 221 of the upper and lower rolling rolls 210 and 220, Can be simultaneously inserted into the helical grooves 212, 222 formed in the mold recesses 211, That is, the upper knot 121 of the nod 120 is inserted into the helical groove 212 formed in the groove 211 of the upper rolling roll 210, and the lower nod 122 of the nod 120 is inserted into the lower rolling Can be inserted into the spiral groove (222) formed in the mold groove (221) of the roll (220).

The grooves 211 and 221 of the upper rolling roll 210 and the lower rolling roll 220 may be formed to have diameters corresponding to the screw rods to be produced. The spiral grooves 212 and 222 formed in the grooves 211 and 221 of the upper rolling roll 210 and the lower rolling roll 220 may be formed to correspond to the nodes of the screw bar to be produced.

The grooves 211 and 221 and the spiral grooves 212 and 222 of the upper rolling roll 210 and the lower rolling roll 220 may be variously changed depending on the type of the screw reinforcement to be produced. The upper and lower rolling rolls have corresponding grooves and spiral grooves for each screw reinforcement to be produced, so that the rolls and spiral grooves of the rolling roll can be changed by selecting a rolling roll suitable for the screw reinforcement to be produced .

The body 110 and the nod 120 may be made of synthetic resin or metal. Therefore, the jig 100 for screw reinforcing bar joints can be made entirely of synthetic resin or metal.

When the screw reinforcement joint jig 100 is made of synthetic resin, it is easy to manufacture, and the jig 100 for screw reinforcement joints is lightened, and workability can be improved.

When the jig 100 for screw reinforcing bars is made of a metal material, the jigs 100 and 200 are screwed into the grooves 211 and 221 and the helical grooves 212 and 222 of the upper and lower rolling rolls 210 and 220, The degree of wear of the nod 120 can be reduced when the jig 100 is coupled, and the durability can be increased. The metal material may be a steel material in consideration of workability and durability.

Hereinafter, a method of aligning the rolling roll 200 for manufacturing a threaded reinforcing bar using the jig 100 for screw reinforcing bar joints will be described.

A method of aligning a rolling roll for manufacturing a screw bar using a jig for screw and bar reinforcement according to an embodiment of the present invention includes a body portion 110 having a diameter corresponding to a screw bar to be produced and having a predetermined length, A screw reinforcement joint jig 100 including a nod 120 formed in a spiral shape on the body 110 so as to correspond to the nod of the screw reinforcement is provided on the upper and lower rolling rolls 210 and 220 (S310) of moving the upper and lower rolling rolls 210 and 220 in the axial direction to align the positions of the grooves 211 and 221 so as to be inserted into the grooves 211 and 221 of the molds 211 and 221, respectively.

7, by moving at least one of the upper rolling roll 210 and the lower rolling roll 220 of the rolling roll 200 for producing a threaded reinforcing bar axially, the screw reinforcing bar jig 100 Can be inserted into the grooves 211, 221 of the respective rolling rolls 210, 220.

A step S320 of binding the nod 120 of the screw reinforcing bar jig 100 to the helical grooves 212 and 222 formed in the grooves 211 and 221 of the upper and lower rolling rolls 210 and 220 ) Can proceed.

The operation for coupling the nib 120 of the screw reinforcing bar joint jig 100 to the helical grooves 212 and 222 may be performed by rotating the upper rolling roll 210 or the lower rolling roll 220 .

8, the upper rolling roll 210 or the lower rolling roll 220 is rotated, and the jig 100 for screw-in-screw joint positioning in the grooves 211 and 221 is moved in the lengthwise direction, (120) can be coupled to the helical grooves (212, 222).

Hereinafter, a case will be exemplified in which the nod 120 of the jig 100 for screw reinforcement is engaged with the helical grooves 212, 222 while the upper roll 210 is rotated.

When the work is performed while rotating the upper rolling roll 210, it is preferable that the upper rolling roll 210 is rotated by the operator. Specifically, the operator can rotate the upper rolling roll 210 by rotating the upper rolling roll hub (not shown) while preventing the power such as oil pressure from being transmitted to the upper rolling roll 210.

If the spiral grooves 212 and 222 of the upper rolling roll 210 and the lower rolling roll 220 are not aligned with the nib 120 of the screw reinforcing bar jig 100, The molds 211 and 221 of the upper and lower rolling rolls 210 and 220 are brought into contact with the nod 120 of the jig 100 for screw- So that the shape of the grooves 211 and 221 can be deformed.

Since the operation for aligning the spiral grooves 212 and 222 of the upper rolling roll 210 and the lower rolling roll 220 with the nib 120 of the screw reinforcing bar jig 100 must be performed carefully, It is preferable that rotation of the rolling roll is performed by the operator.

Therefore, in the state where the external rolling force is not transmitted to the upper rolling roll 210, the operator rotates the upper rolling roll 210 with force, and the screw reinforcing bar jig 100 inserted into the grooves 211, It is preferable that the nod 120 is securely coupled to the helical grooves 212 and 222.

Further, while the upper roll 210 is rotated, it is preferable that the lower roll 220 is also freely rotatable. The upper rolling unit 210 is rotated and the jig 100 for screw reinforcement inserted in the grooves 211 and 221 is moved in the longitudinal direction so that the upper nib 121 of the nib 120 rotates May be coupled to the helical groove (212) of the base (210). The lower nodule 122 of the nod 120 may be coupled to the helical groove 222 of the lower rolling roll 220. When the nib 120 of the jig 100 for screw reinforcement is coupled to the spiral grooves 212 and 222 of the upper and lower rolling rolls 210 and 220 as described above, And the lower rolling roll 220 are correctly set.

The same method as described above can be applied to the case where the nod 120 of the jig 100 for screw reinforcement is engaged with the helical grooves 212 and 222 while the lower rolling roll 220 is rotated. At this time, the upper rolling roll 210 may be in a freely rotatable state.

As described above, setting of the upper rolling roll 210 and the lower rolling roll 220 using the jig 100 for screw reinforcing bar joints can shorten the time required for setting and improve the productivity.

In addition, since the setting accuracy of the upper rolling roll 210 and the lower rolling roll 220 can be improved, it is possible to secure a good quality of the manufactured screw reinforcement. By securing such quality, Can be obtained.

Thereafter, the upper rolling roll 210 and the lower rolling roll 220 may be fixed (S330). To this end, an external force, such as oil pressure, may be generated in the upper and lower rolling rolls 210 and 220 so that the upper and lower rolling rolls 210 and 220 are fixed can do.

The step of separating the upper and lower rolling rolls 210 and 220 from each other and separating the jig 100 for screw reinforcing bar joints may be performed (S340).

To this end, the upper rolling roll 210 can be moved upward by the operation of the roll gap control valve 230. The roll gap control valve 230 may allow an upper roll roll 210 to transmit an adjusting force to lift the upper roll roll 210 upward. For example, the roll gap control valve 230 may deliver this control force to the roll chock 240 and the upper roll 210 may be moved upward as the roll chock 240 moves upward.

When the distance between the upper rolling roll 210 and the lower rolling roll 220 is increased, it is possible to separate the jig 100 for screwing the screw reinforcement positioned in the grooves 211 and 221.

Then, the rolled-spacing control valve 230 is operated to move the rolled-up upper roll 210 downward. At this time, the upper rolling roll 210 can be moved downward as it is moved upward.

Accordingly, the gap between the upper rolling roll 210 and the lower rolling roll 220 can be in the same state as before the removal of the screw reinforcing bar coinciding jig 100.

Through this process, the mold grooves 211 and 221 and the spiral grooves 212 and 222 of the upper and lower rolling rolls 210 and 220 can be accurately set.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: ordinary steel
20,50: Coupler
30: Screw reinforcement
100: Jig for screw reinforcement joint
110:
120:
200: Rolling roll for making screw rebar
210: upper rolling roll
211,212:
212, 222: Spiral groove
220: Lower rolling roll

Claims

A body portion having a diameter corresponding to a screw reinforcement to be produced and inserted into a groove of the upper rolling roll and the lower rolling roll, the body having a predetermined length; And
And a nip portion formed in a spiral shape on the body portion so as to correspond to the nip of the screw bar to be produced and inserted into a spiral groove formed in the grooves of the upper and lower rolling rolls,
Wherein the upper rolling roll is moved upward or downward by a roll interval adjusting valve provided at one end of the upper rolling roll.

The method according to claim 1,
Wherein the body portion and the nodal portion are integrally formed.

The method according to claim 1,
Wherein the body portion and the nod portion are made of synthetic resin or a metal material.

a) a body portion formed to have a predetermined length with a diameter corresponding to a screw reinforcement to be produced, and a nip portion formed in a spiral shape on the body portion to correspond to the nip of the screw reinforcement to be produced, Moving the upper and lower rolling rolls axially to position the molds such that the jigs are inserted into the molds of the upper and lower rolling rolls;
b) coupling the nose portion to a spiral groove formed in a groove of the upper rolling roll and the lower rolling roll;
c) fixing the upper rolling roll and the lower rolling roll; And
d) separating the gap between the upper rolling roll and the lower rolling roll, and separating the jig for screw thread reinforcement,
Wherein in the step d), the upper rolling roll is moved upward by an adjusting force of a roll interval adjusting valve.

5. The method of claim 4,
In the step (b) of joining the nail portion to the helical groove, the nail portion is coupled to the helical groove while rotating the upper rolling roll or the lower rolling roll and moving the jig for screw- Of the rolling rolls.

delete