KR101456965B1 - Endless Rolling Equipment and Method - Google Patents

Abstract

Disclosed are endless rolling equipment and a rolling method. According to an embodiment of present invention, the endless rolling equipment includes: a leading transferring device which aligns a rear end portion of a leading rolling material, is joined with the leading material, moves with the leading rolling material, and guides the leading rolling material to be transferred; and a following transferring device which aligns a front end portion of a following rolling material, is joined with the following rolling material, transfers the following rolling material at the speed faster than the speed of transferring the leading rolling material, makes the front end portion of the following rolling material collide with the rear end portion of the leading rolling material, and consequently makes the front end portion of the following rolling material and the rear end portion of the leading rolling material fused to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an endless rolling equipment and a rolling method,

The present invention relates to a continuous continuous rolling facility and a rolling method capable of realizing continuous rolling by connecting a preceding rolling material and a following rolling material.

In a normal rolling process, a rolling material such as a billet is fed one by one to a rolling roll to produce a wire rod or the like. For example, a rolling material such as a billet is heated to a temperature capable of rolling at a heating furnace (940 to 1080 ° C), followed by rough rolling and finish rolling to produce a desired wire coil.

However, in this rolling method, the product ratio is reduced due to the cutting of the tip of the rolled material and the crop portion of the rear end, and the process of inserting the rolled material into each rolling material causes a lot of work instability. Productivity was low because there was a time lag before the post-rolling material was supplied.

Recently, a continuous rolling technique has been proposed to solve these problems. The continuous continuous rolling technique makes it possible to realize continuous rolling by connecting the rear end of the preceding rolled material to the end of the following rolled material while supplying the rolled material to the rolling roll side.

However, this continuous rolling technique has been difficult to accurately connect the subsequent rolled materials since the connection between the trailing edge of the preceding rolling material and the trailing edge of the trailing material is performed during the rolling process. That is, the preceding rolled material, which is undergoing rolling, tends to be lifted or deformed. When a trailing rolled material is connected thereto, it is easy to connect the center of the preceding rolled material and the succeeding rolled material in a state where they are not exactly aligned. If the connection between the rolled materials is poor, the continuous rolling process may be difficult, such as breakage of the connecting portion in the subsequent rolling process.

Japan Patent Application No. 2006-341276 (disclosed on December 21, 2006) Japanese Patent Application Laid-Open No. 2003-285107 (disclosed on October 7, 2003)

An embodiment of the present invention is to provide a continuous continuous rolling facility and a rolling method capable of realizing accurate connection between a preceding rolling material and a following rolling material.

Also, the embodiment of the present invention is to provide a continuous continuous rolling facility and rolling method capable of improving the productivity by connecting the preceding rolling material and the succeeding rolling material while transferring the preceding rolling material at the rolling speed.

Further, the embodiment of the present invention is intended to provide a continuous continuous rolling facility and rolling method capable of realizing fusing between rolling materials by a method in which the following rolling material collides with the following rolling material.

According to an aspect of the present invention, there is provided a preceding conveying device for aligning a rear end side of a preceding rolled material and guiding a conveying while moving together with a preceding rolled material in a state of being bound; And the trailing edge of the trailing rolled material is aligned with the trailing edge of the trailing rolled material so that the trailing edge of the trailing rolled material follows the trailing edge of the preceding rolled material so that the trailing rolled material is moved faster than the preceding rolled material, There is provided a continuous continuous rolling facility including a trailing conveying device which implements fusion by colliding a leading end with a trailing end of the preceding rolling material.

The rolling facility including a heating furnace for heating the rolling materials fed to the trailing feeder to a forming temperature for rolling; And an additional heating device for heating the tip of the rolled material discharged from the heating furnace to a temperature higher than the molding temperature.

Wherein the additional heating device includes a heating box installed at an outlet of the heating furnace and accommodating a front end portion of the rolled material and provided with an opening at a position facing the front end of the rolled material and an opening and closing member for opening and closing the opening of the heating box, An opening and closing drive device for implementing opening and closing of the opening and closing member, and a heating burner installed in the opening and closing member and radiating a flame toward the front end of the rolling material in the heating box.

The additional heating device may further include a tip detecting sensor installed in the heating box and sensing a tip of the rolled material so that a tip of the rolled material entering the heating box can stop at a heating position.

 The opening and closing drive device may include a hydraulic cylinder for lifting and lowering the opening and closing member for opening and closing the opening of the heating box.

The forming temperature is 940 to 1080 占 폚, and the heating temperature at the tip of the rolled material by the additional heating device may be 1200 to 1300 占 폚.

The rolling facility may further include a guide rail installed along the conveying path of the rolled material and guiding the conveyance of the preceding conveying device and the trailing conveying device.

The preceding conveying device includes a preceding conveying member movably installed on the guide rail, a preceding conveying driving unit for moving the preceding conveying member, and a preceding conveying unit for moving the preceding conveying member, A binding apparatus may be included.

The preceding feed drive unit may include a rack gear unit extended in the feeding direction to the preceding feeding member, a pinion gear engaged with the rack gear unit, and a feed motor driving the pinion gear.

The preceding binding apparatus may include a side binding apparatus for binding both sides of the rolled material and an upper binding apparatus for binding the upper surface of the rolled material.

The side binding apparatus includes first and second side pressing members which are disposed on both sides of the rolled material and which move laterally oppositely to each other, a first advancing / retreating member connected to the first side pressing member and having a first rack gear portion A second rack gear portion disposed on a surface of the first rack gear portion opposite to the first rack gear portion and disposed parallel to the first advancing and retreating member and extending toward the second side pressing member and connected to the second side pressing member A pinion gear meshed with the first and second rack gear portions between the first advancing / retreating member and the second advancing / retreating member, and a driving motor for driving the pinion gear.

The first and second side pressing members may include an entry guide surface inclined at an end portion where the rolling material enters.

The upper surface binding apparatus includes a top surface pressing member provided in a seesaw form on an upper portion of the preceding conveying member and provided with a pressing roller for pressing an upper surface of the rolled material at one end thereof, And a hydraulic cylinder that implements unbinding.

The trailing conveying device includes a trailing conveying member movably provided on the guide rail, a trailing conveying driving unit for moving the trailing conveying member, and a trailing conveying unit provided on the trailing conveying member, A binding apparatus may be included.

The trailing conveyance driving unit may include a pneumatic cylinder for moving the trailing conveying member while being elongated or contracted in the longitudinal direction of the guide rail.

The trailing binding apparatus may include a side binding apparatus for binding both side surfaces of the rolled material and a top binding apparatus for binding the top surface of the rolled material.

According to another aspect of the present invention, there is provided a pre-feeding device for feeding a heated pre-rolled material in a bundled state; And a trailing conveying device for moving the heated post-rolling material faster than the preceding rolling material to effect fusion by colliding the trailing edge of the post-rolling material to the rear end of the preceding rolling material.

According to another aspect of the present invention, there is provided a method of manufacturing a preliminary rolling material, comprising the steps of: transferring a preliminary rolling material at a rolling speed in a state in which rear ends of a heated preliminary rolling material are aligned and bound; And the trailing rolling material is fed at a speed higher than the rolling speed so that the leading edge of the trailing rolling material is conveyed to the leading edge of the preceding rolling And a fusing step of fusing the rear portion of the material to the rear end portion and fusing the rear fusing portion due to the temperature rise caused by the collision can be provided.

The rolling method includes a heating step of heating the rolled material to a forming temperature for rolling in the heating furnace before the welding process, and a step of adding the tip of the rolled material passed through the heating step to a temperature higher than the forming temperature And an additional heating step in which heating is performed so that fusion bonding can be performed in the fusion bonding step.

The forming temperature may be 940 to 1080 ° C, and the temperature for further heating the end of the rolled material in the additional heating step may be 1200 to 1300 ° C.

In the fusing step, the temperature of the collision part may be increased by 400 to 600 DEG C due to the rear end of the preceding rolling material and the collision of the following rolling material.

The rolling method may further include a preparation step of forming a cross-sectional area of a front end and a rear end of the rolled material to be smaller than an intermediate partial cross-sectional area of the rolled material before the heating step.

According to still another aspect of the present invention, there is provided a method of manufacturing a preliminary rolled material, comprising the steps of guiding conveyance in a state of binding a rear end of a heated preliminary rolled material, To the rear end of the preceding rolling material and fusing the rear portion by the rise in temperature due to the collision can be provided.

In the continuous continuous rolling apparatus according to the embodiment of the present invention, the rear end of the preceding rolled material fed to the rolling roll via a heating furnace and the front end of the following rolled material are collided and fused while being aligned by the preceding and succeeding conveying devices , It is possible to realize an accurate connection between the pre-rolled material and the post-rolled material. Therefore, stable and good continuous rolling can be realized in the subsequent rolling process.

In the continuous continuous rolling apparatus according to the embodiment of the present invention, since the preceding rolling material is conveyed at the rolling speed, the connection is achieved through the collision fusion of the preceding rolling material and the succeeding rolling material, so that the continuity of rolling can be maintained, .

In the continuous continuous rolling apparatus according to the embodiment of the present invention, after the heating of the trailing rolling material, the trailing rolling material collides with the preceding rolling material so that the fusion between the rolling materials can be realized. Therefore, The device for connecting the material can be simplified.

1 shows a continuous continuous rolling facility according to an embodiment of the present invention.
FIG. 2 shows a state in which the preceding conveying device and the trailing conveying device of the continuous continuous rolling facility according to the embodiment of the present invention bind and align the preceding rolling material and the following rolling material.
3 shows a state in which the trailing conveying device of the continuous continuous rolling mill according to the embodiment of the present invention connects the trailing edge of the preceding rolling material and the trailing edge of the trailing rolling material in such a manner that the trailing rolling material is transferred to collide with the preceding rolling material.
4 is a side view of the preceding conveying device of the continuous continuous rolling facility according to the embodiment of the present invention.
Fig. 5 is a cross-sectional view taken along the line A-A in Fig. 4, showing a state before binding the rolled material.
6 is a plan view of the preceding conveying device of the continuous continuous rolling facility according to the embodiment of the present invention.
Fig. 7 is a cross-sectional view taken along the line A-A in Fig. 4, showing a state in which rolling materials are bound.
8 is a side view of the trailing conveying device of the continuous continuous rolling facility according to the embodiment of the present invention.
Fig. 9 is a cross-sectional view taken along the line B-B in Fig. 8, showing a state before binding the rolled material.
10 is a perspective view showing a heating furnace and an additional heating device of the continuous continuous rolling facility according to the embodiment of the present invention.
11 is a cross-sectional view showing a heating furnace and an additional heating device of a continuous continuous rolling facility according to an embodiment of the present invention.
12 is a cross-sectional view showing a detailed configuration of an additional heating apparatus of an open continuous rolling facility according to an embodiment of the present invention.
13 shows a rolled material used in an open continuous rolling facility according to an embodiment of the present invention.
FIG. 14 shows a state in which a preceding rolling material and a following rolling material collide with each other in a continuous continuous rolling facility according to an embodiment of the present invention for fusion splicing.
FIG. 15 shows a state in which a preceding rolling material and a succeeding rolling material are welded and connected by a collision in an open continuous rolling facility according to an embodiment of the present invention.
16 shows a modified example of the rolled material used in the continuous continuous rolling facility according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

1 shows a continuous continuous rolling facility according to an embodiment of the present invention. 1, the continuous continuous rolling apparatus includes a heating furnace 100 for heating a rolling material such as a billet for rolling, and a rolling material 10 heated in a heating furnace 100 in a stepwise manner And a rolling mill 200 having rolling rolls 210, 220, 230 and 240 for rolling to produce a desired wire rod. The rear end of the preceding rolling material 10a, which is provided in the rolling material conveying path between the heating furnace 100 and the rolling roll 210 and is fed toward the rolling roll 210 while guiding the conveyance of the rolling material 10, And a rolling material connecting device having a leading conveying device 300 and a trailing conveying device 400 by connecting leading ends of a trailing rolling material 10b discharged from the conveying device 100 so that continuous rolling can be performed.

10 and 11, the heating furnace 100 uses the heating means (not shown) inside to heat the rolled materials (10) to the outlet (102) while feeding the rolled materials (10) 10) is heated to a molding temperature capable of rolling to 940 to 1080 占 폚. The rolling material 10 charged into the inlet 101 of the heating furnace 100 is gradually moved toward the outlet 102 through the inside of the heating furnace 100 so that the temperature of the rolling material 10 gradually reaches the forming temperature do.

The heating furnace 100 is provided with a discharge device 120 installed on the side of the wall adjacent to the outlet 102 to discharge the heated rolled material 10 to the outlet 102 side. The discharge device 120 includes a plurality of rollers 121 spaced apart from each other, a power transmission device 122 such as a chain for connecting the plurality of rollers 121 so as to rotate together, and a power transmission device 122 (Not shown). Here, an example of a discharge device 120 for driving a plurality of rollers 121 is shown as an example. However, the structure of the discharge device for discharging the rolling material 10 from the heating furnace 100 is not limited to this, Can be employed.

10 to 12, the continuous continuous rolling facility of this embodiment is provided with an additional heating device 130 provided at the outlet 102 side of the heating furnace 100. The additional heating device 130 is heated at a molding temperature (about 940 to 1080 ° C) in the heating furnace 100 so as to realize fusion bonding of the preceding rolling material 10a and the succeeding rolling material 10b in a rolling material connecting apparatus to be described later And further heating the tip of the rolled material 10 in a heated state to a temperature higher than the forming temperature.

10 and 12, the additional heating device 130 is installed in the outlet 102 of the heating furnace 100 so as to receive the front end portion of the rolled material 10 immediately before being discharged from the heating furnace 100 A tunnel type heating box 131 provided with an opening 131a at a position opposite to the front end of the rolled material 10, an opening and closing member 132 for opening and closing the opening 131a of the heating box 131, And a heating burner 134 installed in the opening and closing member 132 and radiating a flame toward the front end of the rolling material 10 in the heating box 131 .

The opening and closing drive device 133 is installed above the opening and closing member 132 outside the heating furnace 100 and moves the opening and closing member 132 up and down so that the opening and closing member 132 is moved to the opening 131a of the heating box 131 It can be opened and closed. As the opening and closing drive device 133, a hydraulic cylinder may be employed, but the configuration thereof is not limited thereto. Although not shown in the drawings, the opening and closing member 132 may be opened and closed differently. For example, the opening / closing member 132 may be moved laterally to open / close the opening 131a of the heating box 131, and the opening / closing drive device may be a device for moving the opening / closing member sideways.

The opening and closing member 132 is lifted by the operation of the opening and closing drive device 133 and the opening 131a of the heating box 131 is opened so that the rolling material 10 inside the heating furnace 100 is moved to the opening of the heating box 131 And can be discharged to the outside through the opening 131a. When the opening and closing member 132 is lowered by the operation of the opening and closing drive device 133, the opening and closing member 132 can close the opening 131a of the heating box 131 as in the example of Fig. When the opening and closing member 132 is closed, the heating burner 134 provided on the opening and closing member 132 is disposed opposite to the front end of the rolled material 10 entering the heating box 131, The radiated flame can effectively heat the tip of the rolled material 10. In FIG. 10, reference numeral 135 denotes a fuel supply device for supplying fuel to the heating burner 134.

12, the additional heating device 130 may include a tip detection unit 130 for detecting the tip of the rolled material 10 so that the tip of the rolled material 10 entering the inside of the heating box 131 can stop at an accurate position, Sensor 136 is provided. The tip detecting sensor 136 may be installed on a sidewall of the heating box 131 and may include an optical sensor for detecting whether the rolling material 10 enters the heating box 131 through a sensing hole 131b formed on a sidewall of the heating box 131 . When the leading edge of the rolled material 10 entering the heating box 131 is detected by the leading edge detecting sensor 136, the operation of the discharging device 120 can be controlled to be stopped, The tip can stop at the correct heating position. Thus, effective heating of the tip of the rolled material 10 through the heating burner 134 is possible. Here, the temperature at which the heating burner 134 heats the tip of the rolled material 10 may be 1200 to 1300 占 폚, and preferably 1250 占 폚.

1 to 3, a rolling material connecting apparatus provided in the rolling material conveying path between the heating furnace 100 and the rolling roll 210 includes a guide rail 500 installed along the conveying path of the rolling material 10 And a preceding conveying device 300 and a trailing conveying device 400 provided on the guide rail 500 so as to be movable in the conveying direction of the rolled material 10. [

The preceding conveying apparatus 300 moves along with the preceding rolling material 10a while aligning the rear end side of the preceding rolling material 10a supplied first to the rolling roll 210, . The trailing conveyance device 400 is arranged so that the leading end of the trailing rolled material 10b discharged from the heating furnace 100 is aligned with the trailing end of the preceding rolled material 10a And moves the trailing rolling material 10b toward the preceding rolling material 10a while aligning and binding. At this time, the trailing conveying device 400 moves the trailing rolling material 10b faster than the preceding rolling material 10a to strongly collide the leading edge of the trailing rolling material 10b with the trailing edge of the preceding rolling material 10a, And fusion of the tip of the preceding rolled material 10a. Here, the meaning that the leading conveying device 300 and the trailing conveying device 400 bind and align the rolled materials 10a and 10b means that the trailing edge of the preceding rolled material 10a and the leading edge of the trailing rolled material 10b exactly coincide with each other Means collating to collide.

Figs. 4 to 7 show the configuration of the preceding transport apparatus 300. Fig. The leading conveying apparatus 300 includes a leading conveying member 310 movably installed on the guide rail 500, a leading conveying driving unit 320 for moving the leading conveying member 310, And a preceding binding apparatus 330 which can align and bind the rolled material 10a or release the binding.

4 and 5, the leading feed drive unit 320 includes a rack gear portion 311 provided at a lower portion of the leading feed member 310 in the feeding direction, and a rack gear portion 311 coupled to the rack gear portion 311 A pinion gear 322 and a feed motor 323 for driving the pinion gear 322 in a forward or reverse direction. That is, the pinion gear 322 rotates in the forward or reverse direction by the operation of the feed motor 323, so that the leading feed member 310 is moved along the guide rail 500 in the feed direction of the preceding rolling material 10a or in the reverse direction .

As shown in Figs. 5 and 6, the leading binding apparatus 330 includes a side binding apparatus 340 binding the both side surfaces of the preceding rolling material 10a, and a top binding apparatus 340 binding the top surface of the preceding rolling material 10a Apparatus 350 is provided.

The side binding apparatus 340 includes a first side pressing member 341 and a second side pressing member 342 provided on both sides of the preceding rolling material 10a and arranged to move laterally oppositely to each other, A first advancing / retreating member 343 connected to the urging member 341 and having a first rack gear portion 343a, a second rack gear 343 disposed parallel to the first advancing / retreating member 343 and facing the first rack gear portion 343a A second advancing and retreating member 344 having a second rack gear portion 344a and an extension 344b extending toward the second side pressing member 342 and connected to the second side pressing member 342, The pinion gear 345 engaged with the first and second rack gear portions 343a and 344a between the first advancing / retreating member 343 and the second advancing / retreating member 344 and the pinion gear 345 are driven in the forward or reverse direction And a drive motor 346 for driving the motor. 5, reference numerals 347 and 348 denote guide rollers for guiding the movement of the first advancing / retreating member 343 and the extending portion 344b of the second advancing / retreating member 344.

5, when the pinion gear 345 is rotated in the counterclockwise direction with reference to the drawing by the operation of the drive motor 346, the side binding apparatus 340 is connected to the first advancing / retreating member 343 It is possible to move the second advancing / retreating member 344 in the opposite direction so that the first side pressing member 341 and the second side pressing member 342 move in the direction in which they mutually fuse to release the binding of the preceding rolling material 10a have. 7, when the pinion gear 345 rotates in the clockwise direction with reference to the drawing by the operation of the drive motor 346, the first advancing and retreating member 343 and the second advancing and retreating member 344 are rotated So that the first side pressing member 341 and the second side pressing member 342 move toward each other to bind both sides of the preceding rolling material 10. At this time, since the first side pressing member 341 and the second side pressing member 342 move simultaneously in opposite directions, the left and right positions of the preceding rolling material 10a can be bound in a state in which they are accurately aligned.

As shown in FIG. 6, the first side pressing member 341 and the second side pressing member 342 are provided at an inclined entrance side to guide the front rolling material 10a to smoothly enter the inside thereof, And guide surfaces 341a and 341b.

As shown in Fig. 5, the upper surface binding apparatus 350 is provided in a seesaw form on the upper side of the preceding conveying member 10a and has an upper surface provided with a pressing roller 352 for pressing the upper surface of the preceding rolling material 10a And a hydraulic cylinder 353 for elevating and lowering the opposite end of the upper surface pressing member 351 opposite to the pressure roller 352 to implement binding and unbinding.

The upper surface binding apparatus 350 can release the upper surface binding of the preceding rolling material 10a by contracting the hydraulic cylinder 353 and lifting the opposite pressure roller 352 as shown in Fig. The hydraulic cylinder 353 is extended and the pressure roller 352 on the opposite side is lowered so that the upper surface of the preceding rolling material 10a can be pressed and bound. The upper binding apparatus 350 is configured such that the pressing roller 352 presses the upper surface of the preceding rolling material 10a to make the lower surface of the preceding rolling material 10a adhere to the upper surface of the preceding conveying member 310, So that the directional position can be bound in a state in which the directional position is accurately aligned.

Since the leading binding apparatus 330 can align the left and right direction and the up-and-down direction of the preceding rolling material 10a by the operation of the side binding apparatus 340 and the top binding apparatus 350, Can be aligned so that the center of the preliminary rolling material 10a is accurately positioned at the setting position, and the preceding rolling material 10a can be bound simultaneously with the alignment.

8 and 9, the trailing conveyance apparatus 400 includes a trailing conveyance member 410 movably installed on the guide rail 500, a trailing conveyance driving unit 420 for moving the trailing conveyance member 410, And a trailing binding device 430 which is provided on the trailing conveying member 410 and aligns the leading edge of the trailing rolled material 10b and binds or releases the binding.

The trailing conveyance driving unit 420 may be constructed of a pneumatic cylinder capable of rapidly moving the trailing conveying member 410 while being elongated or contracted in the longitudinal direction of the guide rail 500. As will be described later, the trailing feed driver 420 is preferably designed to move the rolled material 10b having a weight of about 2 tons at a speed of 6 to 8 m / s so as to realize collision fusion between the rolled materials.

Here, the pneumatic cylinder is shown as a preferable example of the traverse transport driving part 420, but the form of the trailing transport driving part 420 is not limited thereto. The trailing conveyance driving unit 420 can realize the linear movement of the trailing conveying member 410 and can be realized by various mechanical devices such as a rack and pinion device, a feed screw device, a chain and a sprocket type.

The trailing binding apparatus 430 may be provided in substantially the same form as the preceding binding apparatus 330 of the preceding feeding apparatus 300 mentioned above. That is, the trailing binding apparatus 430 also includes a side binding apparatus 440 and a top binding apparatus 450. The side binding apparatus 440 includes first and second side pressing members 441 and 442 having an entry guide surface, a first advancing / retreating member 443 having a first rack gearing 443a, A second advancement / retraction member 444 having a rack gear portion 444a and an extension portion 444b, a pinion gear 445, and a drive motor 446. [ The upper surface binding apparatus 450 also includes a top surface pressing member 451 provided with a pressure roller 452 and a hydraulic cylinder 453 operating a top surface pressing member 451.

The operation of the trailing binding apparatus 430 may be the same as the operation of the preceding binding apparatus 330 described above, except for the operation timing. That is, the trailing binding apparatus 430 can align the lateral position and the vertical position of the trailing rolling material 10b by the operation of the side binding apparatus 440 and the top binding apparatus 450, So that the post-rolling material 10b can be bound together with the alignment.

If the trailing binding apparatus 430 aligns and binds the trailing rolling material 10b so that the trailing end of the preceding rolling material 10a is already aligned by the preceding binding apparatus 330, So that it can exactly follow and follow the preceding stage of the preceding rolled material 10a.

The following describes the overall operation of such continuous continuous rolling mill and a method for implementing continuous rolling using it.

As shown in FIG. 11, in order to perform rolling, first, a heating process is performed in which rolling materials 10 are charged into a heating furnace 100 and heated. At this time, the rolled material 10 is heated to a forming temperature (940 to 1080 DEG C) such that the rolled material 10 is in a state suitable for rolling. The rolled material 10 heated to the forming temperature in the heating furnace 100 may be discharged to the outlet 102 of the heating furnace 100 by the operation of the discharging device 120.

The rolled material 10 subjected to the heating process is subjected to an additional heating process for further heating the front end thereof before being discharged from the heating furnace 100. 12, the heating burner 134 operates in a state in which the leading end of the rolled material 10 enters the inside of the heating box 131 of the additional heating device 130, so that the tip of the rolled material 10 Is heated so as to reach the temperature for collision fusion. At this time, the edge of the rolled material 10 entering the heating box 131 can be stopped at the precise heating position while being sensed by the tip end sensor 136, so that the tip of the rolled material 10 can be effectively heated.

The temperature at which the heating burner 134 further heats the tip of the rolled material 10 in the additional heating process may be selected in the range of 1200 to 1300 占 폚 higher than the forming temperature, and may be preferably 1250 占 폚. The rolled material 10 subjected to the additional heating process may be discharged to the heating furnace 100 after the opening and closing member 132 of the additional heating device 130 is opened.

On the other hand, in the case of the rolled material 10 which is first discharged from the heating furnace 100 at the beginning of the rolling operation, since there is no object to which the leading end thereof is connected, the additional heating step can be omitted. (10) can be discharged through an additional heating process since it is necessary to connect with the preceding rolling material (10a).

Referring to Figs. 1 to 3, the rolled material 10 heated in the heating process and the additional heating process may be supplied to the rolling roll 210 through the conveying path to achieve rolling. At this time, the preceding rolled material 10a which is first discharged from the heating furnace 100 is supplied to the rolling roll 210 without rolling collision by the trailing conveying device 400 and the preceding conveying device 300, .

When the rear end of the preceding rolled material 10a reaches the set position in a state where rolling of the preceding rolled material 10a previously supplied to the rolling roll 210 is performed, The rear side of the rolled material 10a is aligned and guided while moving along with the preceding rolled material 10a in a bundled state. At this time, the leading conveyer 300 moves at a speed of 0.15 m / s, which is the rolling speed of the preceding rolling material 10a. Therefore, the rear end of the preceding rolled material 10a can be conveyed with its center aligned exactly.

When the trailing rolled material 10b with its tip heated further is discharged from the heating furnace 10 in this state, the trailing conveying device 400 is positioned such that the leading edge of the trailing rolled material 10b is positioned at the rear end of the preceding rolled material 10a And the trailing rolling material 10b is moved at a speed of 6 to 8 m / s, which is faster than the rolling speed of the preceding rolling material 10a, after the front edge of the trailing rolling material 10b is aligned so as to follow So that the leading end of the trailing rolled material 10b is collided with the trailing end of the preceding rolled material 10a so that the tip of the trailing rolled material 10b and the trailing end of the preceding rolled material 10a are fused.

At this time, the leading edge of the trailing rolled material 10b is further heated to 1200 to 1300 占 폚 by the additional heating device 130, and the trailing rolled material 10b having an approximate weight of 2 tons is fed at a speed of 6 to 8 m / s The steel material rapidly moves to the rear end of the preceding rolling material 10a which moves at a rolling speed (0.15 m / s). As a result, an additional temperature rise of approximately 400 to 600 ° C occurs at the moment of collision. That is, due to the additional temperature rise due to the collision, the temperature of the collided portion rises to about 1600 ° C or more at the time of collision, and this temperature exceeds the melting temperature 1590 ° C of the rolled material 10, As a preferable example, if the tip of the after-rolled material 10b is heated to 1250 占 폚 in the additional heating device 130, the temperature of the collision portion rises to 1650 占 폚 or more, so that the collision of the collision portion can be achieved.

In the present embodiment, since the rear end of the preceding rolled material 10a and the leading end of the following rolled material 10b are collided with each other in a state in which they are aligned by the preceding and succeeding conveying devices 300 and 400, (10a) and the post-rolling material (10b). If the connection between the rolled materials is performed correctly, stable and good continuous rolling can be realized. Further, since the fusion welding process realizes the connection of the preceding rolling material 10a and the following rolling material 10b while the preceding rolling material 10a is being conveyed at the rolling speed, the continuity of rolling can be maintained and productivity can be improved .

In addition, since this embodiment can realize the connection between the preceding rolling material 10a and the succeeding rolling material 10b without a separate welding machine or the like, it is possible to simplify the structure of the apparatus for connecting the rolling material to the prior art.

After the trailing edge of the preceding rolled material 10a and the trailing edge of the trailing rolled material 10b are connected to each other, the leading transport device 300 and the trailing transport device 400 move back to the original position in the state of releasing the binding of the rolled materials 10a, The next work can be waited for, and then the connection between the rear end of the preceding rolled material 10a and the end of the following rolled material 10b can be realized in the same manner so that continuous rolling can be performed.

For the continuous continuous rolling according to the present embodiment, the front end and the rear end of the rolled material 10 may be formed to have a smaller cross-sectional area than the middle partial cross-sectional area of the rolled material as in the example of FIG. That is, the fusion connecting portion 10d having a relatively small cross-sectional area can be formed at the front end and the rear end of the rolled material 10. For this, the rolled material 10 may be subjected to a preparation step of forming a fused joint portion 10d at the front end and the rear end thereof by cutting, forging, or the like, before the process of heating in the heating furnace 100.

The fusion splice 10d having a relatively small cross-sectional area may be provided so that a stepped step is formed at both ends of the rolled material 10 as shown in FIG. Or may be provided in such a form that the cross-sectional area gradually decreases as the fusion splicing portion 10e is moved toward the end portion as in the example of FIG.

When the cross-sectional area of the front end and the rear end of the rolled material 10 is relatively small, the fusion heating parts 10d and 10e are locally intensively heated in the process of heating the tip of the rolled material 10 in the additional heating device 130 So that the heating efficiency can be increased.

In addition, when the fusion is performed by the collision of the preceding rolling material and the following rolling material as in the example of FIG. 14, a collision force acts on a relatively small cross-sectional area instantaneously at the time of collision, which is advantageous for increasing the heat generation amount due to the collision. In addition, as shown in FIG. 15, when the fusion portion is deformed due to collision, the phenomenon that the fusion portion of the book protrudes outside the side surface of the rolled materials 10a and 10b is minimized, so that the subsequent rolling process can proceed smoothly.

10: rolled material, 10a: pre-rolled material,
10b: post-rolling material, 100: heating furnace,
130: additional heating device, 131: heating box,
132: opening / closing door, 133: opening / closing drive device,
134: heating burner, 136: tip detecting sensor,
200: rolling mill, 210, 220, 230, 240: rolling roll,
300: preceding conveying device, 310: preceding conveying member,
320: preceding feed drive unit, 330: leading binding unit,
340: side binding apparatus, 350: top binding apparatus,
400: trailing conveying device, 420: trailing conveying driving part,
430: trailing binding device, 500: guide rail.

Claims (26)

A preceding conveying device for aligning a rear end side of the preceding rolled material so as to guide the conveying while moving together with the preceding rolled material in a bundled state; And
The trailing rolling material is moved faster than the preceding rolling material in a state where the trailing edge of the trailing rolling material aligns with the trailing edge of the trailing rolling material so as to follow the trailing edge of the preceding rolling material, To the rear end of the preceding rolling material so as to realize fusion bonding. The method according to claim 1,
A heating furnace for heating the rolled materials fed to the trailing feeder to a forming temperature for rolling;
Further comprising an additional heating device for heating the tip of the rolled material discharged from the heating furnace to a temperature higher than the forming temperature. 3. The method of claim 2,
The additional heating device
A heating box installed at an outlet of the heating furnace and accommodating a front end portion of the rolled material and provided with an opening opposed to the front end of the rolled material;
An opening and closing member for opening and closing an opening of the heating box,
An opening and closing drive device for realizing opening and closing of the opening and closing member,
And a heating burner installed in the opening and closing member and radiating a flame toward the leading end of the rolled material inside the heating box. The method of claim 3,
Wherein the additional heating device further comprises a tip detecting sensor installed in the heating box and sensing a tip of the rolled material so that the tip of the rolled material entering the heating box can stop at a heating position. The method of claim 3,
Wherein the opening and closing drive device includes a hydraulic cylinder for lifting and lowering the opening and closing member for opening and closing the heating box opening. 3. The method of claim 2,
The molding temperature is 940 to 1080 占 폚,
And the heating temperature of the end of the rolled material by the additional heating device is 1200 to 1300 ° C. 7. The method according to any one of claims 1 to 6,
Further comprising a guide rail installed along the conveying path of the rolled material and guiding the conveyance of the preceding conveying device and the trailing conveying device. 8. The method of claim 7,
The preceding transport device
A preceding conveying member movably provided on the guide rail,
A preceding feed driver for moving the preceding feed member,
And a preceding binding apparatus which is provided on the preceding conveying member and which aligns and binds or releases the binding of the rolled material. 9. The method of claim 8,
The preceding feed drive unit
A rack gear portion provided on the preceding conveying member in the conveying direction,
A pinion gear engaged with the rack gear portion,
And a feed motor for driving the pinion gear. 9. The method of claim 8,
The preceding binding apparatus
A side binding apparatus for binding both sides of the rolled material,
And an upper surface binding apparatus for binding the upper surface of the rolled material. 11. The method of claim 10,
The side binding apparatus
First and second side pressing members disposed on both sides of the rolled material and advancing and retreating laterally in opposite directions,
A first advancing / retreating member connected to the first side pressing member and having a first rack gear portion,
And a second rack gear portion provided on a surface of the first rack gear portion opposite to the first rack gear portion and extending toward the second side pressing member and connected to the second side pressing member, A two-
A pinion gear meshing with the first and second rack gear portions between the first advancing / retreating member and the second advancing / retreating member,
And a drive motor for driving said pinion gear. 12. The method of claim 11,
Wherein the first and second side pressing members include an entrance guide surface inclined at an end portion where the rolling material enters. 11. The method of claim 10,
The upper surface binding apparatus
A top surface pressing member provided on the top of the preceding conveying member in a seesaw form and provided at one end with a pressing roller for pressing an upper surface of the rolled material,
And a hydraulic cylinder for lifting and lowering the opposite end of the upper surface pressing member opposite to the pressing roller to implement binding and unbinding. 8. The method of claim 7,
The trailing transport device
A trailing conveyance member movably provided on the guide rail,
A trailing conveyance drive unit for moving the trailing conveyance member;
And a trailing binding apparatus provided on the trailing conveying member for aligning and binding the rolled material or releasing the binding. 15. The method of claim 14,
Wherein the trailing conveyance driving unit includes a pneumatic cylinder that moves the trailing conveying member while being elongated or contracted in the longitudinal direction of the guide rail. 15. The method of claim 14,
The trailing binding apparatus
A side binding apparatus for binding both sides of the rolled material,
And an upper surface binding apparatus for binding the upper surface of the rolled material. 17. The method of claim 16,
The side binding apparatus
First and second side pressing members disposed on both sides of the rolled material and advancing and retreating laterally in opposite directions,
A first advancing / retreating member connected to the first side pressing member and having a first rack gear portion,
And a second rack gear portion provided on a surface of the first rack gear portion opposite to the first rack gear portion and extending toward the second side pressing member and connected to the second side pressing member, A two-
A pinion gear meshing with the first and second rack gear portions between the first advancing / retreating member and the second advancing / retreating member,
And a drive motor for driving said pinion gear. 18. The method of claim 17,
Wherein the first and second side pressing members include an entrance guide surface inclined at an end portion where the rolling material enters. 17. The method of claim 16,
The upper surface binding apparatus
A top surface pressing member provided on a top of the trailing conveying member in a seesaw form and provided with a pressure roller at one end for pressing an upper surface of the rolled material,
And a hydraulic cylinder for lifting and lowering the opposite end of the upper surface pressing member opposite to the pressing roller to implement binding and unbinding. A preceding conveying device for guiding conveyance in a state in which a heated preliminary rolling material is bound; And
And a trailing conveying device for moving the heated post-rolling material faster than the preceding rolling material so as to realize fusion by colliding the trailing edge of the post-rolling material to the rear end of the preceding rolling material. A step of transferring the preceding rolled material at a rolling speed in a state in which the rear end side of the heated preceding rolled material is aligned and bound,
The trailing rolling material is fed in a state in which the leading edge of the heated trailing rolling material aligns with the trailing edge of the trailing rolling material so as to follow the trailing edge of the preceding rolling material, And a fusing step of moving the front end of the subsequent rolling material to a rear end of the preceding rolling material by moving at a high speed and fusing the rear portion of the rear rolling material due to the temperature rise due to the rear fusing. 22. The method of claim 21,
A heating step of heating the rolled material to a forming temperature for rolling in a heating furnace before the fusing step;
And further heating the front end of the rolled material that has been subjected to the heating step to a temperature higher than the forming temperature before the fusing step so that fusing can be performed in the fusing step. 23. The method of claim 22,
The molding temperature is 940 to 1080 占 폚,
Wherein the temperature for further heating the tip of the rolled material in the additional heating step is 1200 to 1300 占 폚. 24. The method according to any one of claims 21 to 23,
Wherein the fusion welding step raises the temperature of the collision part by 400 to 600 DEG C due to the trailing edge of the preceding rolling material and the collision of the trailing rolling material. 23. The method of claim 22,
Sectional area of a front end and a rear end of the rolled material before the heating step is smaller than an intermediate partial cross-sectional area of the rolled material. A step of guiding the conveying in a state of binding the rear end side of the heated preliminary rolling material,
And a welding step of moving the heated trailing rolled material at a higher speed than the preceding rolled material to cause the leading edge of the trailing rolled material to collide with the trailing edge of the preceding rolled material, Rolling method.

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