KR101259222B1 - Heating furnace having function to rotate rolling workpiece - Google Patents

Abstract

The present invention relates to a heating furnace having a rolling material rotating function for suppressing the occurrence of a skid mark.

The heating furnace having the rolling function of the rolling material according to an embodiment of the present invention is provided with a fixed beam and a working beam on which a supporting member for supporting a rolling material is mounted, A rotation inducing part may be provided on the upper part so that the rolling inducing part can be formed in a direction in which the rolling material advances.

According to the present invention, since the rolling material is rotated while moving in the heating furnace, the formation of the skid marks due to contact with the supporting member can be suppressed, and in the state where the final heating process is completed, It is possible to improve the cracking property by reducing the temperature deviation in the contact rolled material region, thereby improving the rate of realization of the rolled material, improving the quality, improving the rolling workability, and increasing the productivity.

Wire rod, rolling material, heating furnace, skid mark, billet

Description

{HEATING FURNACE HAVING FUNCTION TO ROTATE ROLLING WORKPIECE}

The present invention relates to a heating furnace having a rolling material rotating function for suppressing the occurrence of a skid mark.

Generally, a heating furnace is composed of a preheating furnace, a heating furnace and a crack, and a rolling material such as a billet is gradually moved by a fixed beam called a skid member and a working beam from the charging side to the extraction side, To a temperature at which rolling is possible.

1, the heating furnace has a rolling material 10 mounted on a fixed beam 20 and a working beam 40 to move the rolled materials 10 therein, and a working beam 40, The rolling material 10 gradually moves from the charging side to the extraction side of the heating furnace by the operating cycle of the heating furnace (rising, advancing, falling, and backing).

2A, the fixed beam 30 and the working beam 40, each of which is configured to be supported by the beam post 50, are connected to the cooling tubes 31 and 41 through which the cooling water 32 and 42 flow, And is protected and maintained from the high-temperature atmosphere inside the heating furnace. A plurality of supporting members 20 are provided at upper portions of the fixed beams 30 and the working beams 40 to support the rolling material 10.

In this case, the fixed beam 30 and the working beam 40, which are cooled by the cooling water, lower the temperature of the contact portion with the rolling material 10 placed on the supporting member 20. Therefore, a heat loss occurs in the region of the rolled material 10 that is in contact with the receiving member 20, so that the temperature of the rolled material 10 varies between the region to be heated and the contact region .

Such a temperature deviation is maintained at about 50 DEG C so that a defective area called a skid mark is generated in the region of the rolled material 10 in contact with the supporting member 20. [ The skid mark portion causes a difference in the elongation rate of the rolled material in a rough rolling process such as a wire rolling process and causes a problem in that the accuracy of the cross-sectional size or the discharge amount of the rolled material is lowered due to the difference in elongation rate .

In addition, the change of the rolling material loop control during the rolling of one day and the next rolling period is severely caused, causing damage to the inlet guide, which is a key component of the rolling of the wire, thereby causing problems such as scratches on the surface of the rolled material .

In addition, the skid mark caused by the temperature deviation of the rolled material repeatedly increases the momentary load change of the rolling drive motor, adversely affecting the control characteristics of the driving motor, and also causes a deterioration in workability of the wire rolling and a wire quality problem.

Conventionally, it has been inevitable to increase the heating time or excessively increase the heating furnace temperature in order to reduce the temperature deviation in the skid mark portion. Such an increase in the heating furnace temperature is caused by the excessive use of the fuel, .

In addition, since the rolled material becomes overheated due to excessive use of the fuel, scale generation is increased and the rate of the water loss is lowered. In this case, in order to remove the scale generated on the surface of the heated material, high-pressure water impact is used to remove it, but the surface of the rolled material is scratched.

The present invention is realized by recognizing at least one of the requirements or problems occurring in the heating furnace of the conventional rolling material as described above.

It is an object of the present invention to allow rotation of the rolled material during its travel so that the formation of skid marks due to contact with the receiving member is minimized.

Another object of the present invention is to minimize the temperature deviation in the area of the rolled material contacted with the supporting member in the state that the final heating process is completed for rolling.

Another object of the present invention is to improve the cracking property by minimizing the temperature deviation in the rolling material region contacted with the supporting member in the state where the final heating process is completed for rolling.

Another object of the present invention is to enable the rolling material moved by the operation of the working ice to be rotated by the supporting member provided on the fixed beam and the working beam without any additional device.

Another object of the present invention is to enable rotation of a rolled material moving inside a heating furnace by replacing a supporting member without replacing or modifying a conventional heating furnace.

A heating furnace having a rolling material rotating function according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically based on the fact that rotation is made while the rolling material advances, so that occurrence of skid marks due to contact with the supporting member is suppressed as much as possible.

The heating furnace having a rolling material rotating function according to an embodiment of the present invention may be provided with a fixed beam and a working beam equipped with a supporting member for supporting a rolled material on an upper portion thereof, The member may be provided with a rotation inducing part on the upper part so as to be able to roll in a direction in which the rolling material advances.

In this case, the upper portion of the rotation inducing portion may be a surface inclined downward or upward at different angles in a direction in which the rolling material advances. The rotation inducing unit may further include a supporting portion inclined upward in a direction in which the rolling material advances to adjust the degree of rotation of the rolling material at the lower end thereof.

On the other hand, the rotation inducing portion may be formed such that the downward inclination angle of the rotation inducing portion of the working beam is smaller than the downward inclination angle of the rotation inducing portion of the fixed beam and larger than -90 degrees.

On the other hand, the support portion may be formed such that the inclination angle of the support portion formed on the working beam is greater than or equal to the inclination angle of the support portion formed on the fixed beam.

Cooling may be performed so that the working beam and the fixed beam are maintained at a temperature deviation of 18 to 20 DEG C from the heated rolled material.

Further, the support member having the rotation inducing unit may be detachably coupled to the working beam and the fixed beam.

As described above, according to the present invention, rotation is performed while the rolling material moves inside the heating furnace, so that formation of skid marks due to contact with the supporting member can be suppressed.

In addition, according to the present invention, in a state where the final heating process is completed, the temperature deviation in the area of the rolled material contacted with the supporting member is reduced, and the cracking property can be improved.

Further, according to the present invention, the rolled material moved by the operation of the working ice can be rotated by the holding member provided in the fixed beam and the working beam without any additional device.

In addition, according to the present invention, even if a conventional heating furnace is not replaced or remodeled, rotation of the rolled material moving inside the heating furnace can be performed only by replacing the supporting member, thereby improving the rate of realization of the rolled material.

In addition, according to the present invention, it is possible to reduce the cost due to the application of the apparatus, in addition to the improvement of the real rate of the rolled material.

Further, according to the present invention, there are effects such as improvement of the quality of rolled products, improvement of rolling workability, and increase of productivity.

Also, according to the present invention, it is possible to minimize occurrence of material skewing (alignment defects) due to overhang during conveying of the material on the crack side due to deflection of the material in the overhang section due to rotation of the rolled material.

Further, according to the present invention, deflection of the rolled material in the overhanging section can minimize the phenomenon due to rotation of the rolled material.

In order to facilitate understanding of the features of the present invention as described above, a heating furnace having a rolling material rotating function according to an embodiment of the present invention will be described in detail.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments. Therefore, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

In order to facilitate understanding of the embodiments to be described below, in the reference numerals shown in the accompanying drawings, the related elements among the elements that perform the same function in the embodiments are indicated by the same or an extension line number.

Embodiments related to the present invention are basically based on that the rotation is made while the rolling material advances so that the generation of skid marks due to contact with the supporting member is suppressed as much as possible.

3A and 3B show a heating furnace 100 having a rolling material rotating function according to an embodiment of the present invention.

The fixing beam 30 is supported by the beam post 50 and the upper portion of the fixed beam 30 is moved in a direction in which the rolling material 10 moves A plurality of supporting members 110 are provided. In this case, the rotation inducing unit 111 may be formed on the supporting member 110 so that the rolled material 10 can be inclined at a predetermined angle along the moving direction.

On the other hand, the working beam 40 can be configured to have an operating cycle such as up, down, down and back. In this case, the working beam 40 may be coupled directly to the apparatus providing the operating cycle, and supported by the beam post 50 as shown, such that the beam post 50 is coupled to the apparatus providing the operating cycle .

A plurality of supporting members 120 are provided on the upper portion of the working beam 40 in a direction in which the rolling material 10 moves. In this case, the rotation inducing unit 121 may be formed on the support member 120 so that the rolled material 10 can be inclined at an angle along the movement direction.

Therefore, it is possible to apply a configuration in which the rolling material 10 is rotated only by replacing the supporting members 110 and 120 provided with the rotation inducing parts 111 and 121 in the existing heating furnace.

The rolled material 10 placed on the supporting member 120 of the working beam 40 by the operation of the working beam 40 has the same structure as that of the working beam 40 of the upward, And is moved to another support member 110 at the front where the rolling material 10 moves in one supporting member 110 of the fixed beam 30 by the operating cycle.

In this case, the rolling member 10 is rotated by the rotation inducing units 111 and 121 provided on the fixed beam 30 and the working beam 40 in a direction of advancing according to the operation cycle of the working beam 40, Stepwise rotation is performed. In this case, the rotation inducing units 111 and 121 may be inclined downward in a direction in which the rolling material 10 moves, and may be inclined downward in a direction opposite to the direction in which the rolling material 10 moves It is possible.

The rolling guides 10 and 11 are provided on the upper and lower surfaces of the fixed guide 30 and the fixed guide 30 so that the lower surface of the fixed guide 30 and the lower surface of the fixed guide 30 are inclined at different angles. The rolling material 10 can be rotated in a full-thickness direction. In other words, the rotation inducing portions 111 and 121 of the fixed beam 30 and the working beam 40 are configured such that the angle that induces the rotation with respect to the rolling material 10 is applied stepwise and repeatedly so that the rolling material 10 is rotated .

The one or more rotation inducing units 111 and 121 may further include support portions 112 and 122 inclined in a direction in which the rolling material 10 advances to adjust the degree of rotation of the rolling material 10 at the lower end thereof. In this case, the support portions 112 and 122 may have an inclination direction opposite to the inclination direction of the rotation inducing portions 111 and 121.

The rotation inducing unit 111 of the fixed beam 30 and the rotation inducing unit 121 of the working beam 40 may be configured to be inclined downward.

4A and 4B, the rotation inducing portion 121 of the working beam 40 is inclined at a minus inclination angle smaller than the downward inclination angle of the rotation inducing portion 111 of the fixed beam 30 Lt; / RTI > In this case, the rotation inducing unit 121 of the working beam 40 may be made larger than -90 degrees.
4A and 4B, the downward inclination angle of the rotation inducing unit 111 of the fixed beam 30 is set to be smaller than the downward inclination angle of the rotation inducing unit 121 of the walking beam 40, It can be constituted of a large numerical inclination angle, that is, an inclination angle having a small negative value. The downward tilt angle of the rotation inducing unit 121 of the working beam 40 may be a tilt angle having a numerical value greater than -90 degrees in a clockwise direction with respect to the horizontal direction at the top, that is, a tilt angle having a small negative value.

The support portions 112 and 122 formed on the fixed beam 30 and the working beam 40 may be formed to be inclined upward in the opposite direction to the rotation inducing portions 111 and 121. [ In this case, the inclination angle alpha of the support portion 122 formed on the working beam 40 may be greater than or equal to the inclination angle alpha of the support portion 112 formed on the fixed beam 30.

The inclination angle alpha formed by the rotation inducing portion 121 of the working beam 40 on the vertical plane and the inclination angle alpha formed by the supporting portion 122 of the working beam 40 on the horizontal plane may be the same angle .

As described above, the supporting members 110 and 120 provided on the fixed beam 30 and the working beam 40 are sized according to the moving distance of the working beam 40 due to the upward, downward, 10 may be configured to rotate. That is, the positions of the rotation inducing parts 111 and 121 or the positions of the rotation inducing parts 111 and 121 and the supporting parts 112 and 122 are determined to determine the position where the rolling material 10 is supported, .

In this case, the positions of the rotation inducing parts 111 and 121 or the positions of the rotation inducing parts 111 and 121 and the supporting parts 112 and 122 provided on the supporting members 110 and 120 are maintained at a temperature range of 18 to 20 ° C May be determined.

In this case, the positions of the rotation inducing parts 111 and 121 or the rotation inducing parts 111 and 121 and the supporting parts 112 and 122 are formed in the rolling material 10, which advances by one operation cycle consisting of the upward, May be arranged so as to be rotated by 90 degrees.

The supporting members 110 and 120 having the rotation inducing units 111 and 121 and the supporting units 112 and 122 may be detachably coupled to the fixed beam 30 and the working beam 40. [

5 and 6, a description will be made of a process in which the rolled material 10 is rotated while being moved inside the heating furnace 100 by the rotation inducing parts 111 and 121 which can be configured as described above.

5 (a) and 6 (a), when the initial rolling material 10 is loaded on the upper portion of the fixed beam 30, as shown in FIGS. 5 (b) and 6 The working beam 40 rises for movement of the rolled material 10 as shown in FIG. At this time, the rolling material 10 is rotated at a certain angle by the rotation inducing part 121 of the working beam 40. [ In this case, the rotated state of the rolled material 10 can be visually confirmed through the confirmation point 11.

5 (c) and 6 (c), the working beam 40 advances, so that the rolling material 10 is moved in the direction of the other supporting member 110 of the fixed beam 30 And moves to the upper position.

5 (d) and 6 (d), the working beam 40 is lowered so that the rolled material 10 is moved to the upper side of the other supporting member 110 of the fixed beam 30 . At this time, the rolling material 10 is further rotated at a predetermined angle by the rotation inducing part 111 of the fixed beam 30. Even in this case, the rotated state of the rolled material 10 can be visually confirmed through the confirmation point 11.

5 (e), the working beam 40 is moved backward to an initial position for advancing the rolled material 10.

In this case, the rotation angle of the rolling material 10 is adjusted by the action of the supporting portions 112 and 122 in addition to the rotation inducing portions 111 and 121 formed on the supporting beams 110 and 120 of the fixed beam 30 and the working beam 40, .

The heating furnace having the rolling material rotating function according to the present invention is not limited to the embodiments of the heating furnace having the rolling material rotating function as described above but the embodiments are not limited to the embodiments All or some of the embodiments may be optionally combined.

1 is a partial plan view schematically showing a state in which a billet is placed on a fixed beam and a working beam disposed in a conventional heating furnace.

2A is a partial cross-sectional view schematically showing a cooling structure of a fixed beam and a working beam disposed inside a conventional heating furnace.

FIG. 2B is a front view schematically showing a state in which a rolling material is placed on a support member provided in a fixed beam and a working beam disposed in a conventional heating furnace.

3A is a front view schematically showing an example of a structure of a fixed beam provided in a heating furnace having a rolling material rotating function according to an embodiment of the present invention.

3B is a front view schematically showing an example of a structure of a working beam provided in a heating furnace having a rolling material rotating function according to an embodiment of the present invention.

4A is a conceptual view for explaining a rotation inducing unit of a supporting member mounted on the fixed beam shown in FIG. 3A.

FIG. 4B is a conceptual view for explaining the rotation inducing unit of the supporting member mounted on the upper portion of the working beam shown in FIG. 3B.

FIG. 5 is a conceptual diagram for explaining a process in which a rolling material is rotated while being supported by a supporting beam mounted on a fixed beam and a working beam constituting an embodiment of the present invention.

6 is an operational state diagram for explaining a process in which a rolling material is rotated while being supported by a supporting beam mounted on a fixed beam and a working beam constituting an embodiment of the present invention.

Description of the Related Art [0002]

10 ... rolled material 20,110,120 ... receiving member

30 ... fixed beam 31, 41 ... refractory

32, 42 ... Cooling water 40 ... Working beam

50 ... beam post 100 ... heating furnace

111, 121 ... rotation induction parts 112, 122 ... support parts

Claims (7)

1. A heating furnace comprising a fixed beam and a working beam mounted on a support member for supporting a rolled material on an upper portion thereof, The supporting member provided on the fixed beam and the working beam is provided with a rotation inducing part on the upper part so as to make a sphere in a direction in which the rolling material advances, Wherein the rotation inducing portion is composed of a surface whose upper portion is inclined downwardly or upwardly at different angles in a direction in which the rolling material advances, and a downward inclination angle of the rotation inducing portion of the working beam is set Wherein the inclination angle is smaller than the downward inclination angle of the induction portion and is greater than -90 degrees. delete The heating furnace as set forth in claim 1, wherein the rotation inducing unit further comprises a supporting portion inclined upward in a direction in which the rolling material advances to adjust the degree of rotation of the rolling material at a lower end thereof. delete The heating furnace as set forth in claim 3, wherein the support portion has a tilt angle of the support portion formed on the working beam is greater than or equal to an inclination angle of the support portion formed on the fixed beam. delete The heating furnace according to claim 1, wherein the supporting member provided with the rotation inducing unit is detachably coupled to the working beam and the fixed beam.

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