JP2832585B2 - Method and apparatus for sending a rolling rod to a cooling floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for axially advancing a straight rolling rod into a cooling bed, and more particularly to a method and a device for preventing the rolling rod from being cobbled. The invention further relates to a method and an apparatus for processing rolled rods produced at high speed by a rolling mill and advancing straight in the axial direction.

[0002]

BACKGROUND OF THE INVENTION Over the past decade, many improvements have been made to high speed finishing techniques for wire rod products. One of them is a method of introducing a rod block without twist and an improvement of a "laying reel" coil forming a head. By combining both techniques, the finishing speed of the rolled rod was increased from 50 M / S to 100 M / S. Improvements in the rolling of straight bars are not sufficient. In other words, for example, there was not much problem in rolling a large-diameter bar up to a diameter of 12 mm. But,
In the case of 10 to 8 mm diameter, you have to operate at low speed,
Productivity has also declined. No. 5,027,632, filed by the present applicant, discloses a method and an apparatus for feeding a rolled bar to a splitter without twisting, a so-called NTA system. While this system substantially improves finishing speed, it presents a problem when feeding small diameter rods to the cooling bed at high speed.

[0003] Basically, the run-in table receives the bar at a high speed, but the run-in table should theoretically move as smoothly as possible, and should come into contact with the front end having a projection which causes cobbles. Must be avoided. Unfortunately, it is not possible to obtain a smooth surface because the run-in table also has other roles. In the case of a closed groove system installation, there is a new maintenance problem due to the limitation on the maximum length. When steel rods are put into the table of the cooling floor at a high speed, an extremely long distance is required because the steel rod is decelerated before being discharged to the cooling floor. As a result, a large space is required, so that construction of a factory is costly. In the case of normal deceleration, the braking distance is determined by the square of the finishing speed. An outer brake is required to shorten the braking distance.

[0004] Two well-known braking methods are as follows. 1) A method of controlling with a pinch roller (FIG. 1). In this case, the steel bar 1 passes between the pair of pinch rollers 2. Pinch rollers have two purposes. One is to accelerate the rod to shear it to the length of the cooling floor and release it from the next rod. The second is to rotate the rod in the opposite direction to brake the rod to a processable speed and to rake the cooling floor. Release. This method has the disadvantage of damaging the surface of the steel bar. In this system, there is no need to provide additional rollers along the run-in table of the cooling floor.

2) A method of braking with a magnetic pad (FIG. 2).
In this case, the magnetic coil 4 is installed below the lift apron of the table. When the coil 4 is energized, the friction between the bar and the table surface increases, and the bar is decelerated. In the case of this mechanism, it is necessary to further provide a roller 5 along the lift apron to accelerate the cut bar piece and separate it from the next bar that has entered after the shear 3. The top surface of the roller 5 needs to protrude from the height of the lift apron and come into contact with the rod. As a result, the front end of the rod strikes the top of the roller,
The front end of the bar may spring off. This can cause formation of cobbles in the cooling floor.

[0006]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a "bounce effect" of a bar.
To provide a method and apparatus that minimizes Another object of the present invention is to achieve the above object without employing a pinch roller. The above and other objects of the present invention are achieved by the following constitutions. The first magnetic means in this configuration cooperates with the lift apron to brake the tail end of the rolling rod and reduce its forward speed. The second magnetic means cooperates with a run-in table at a position distant from the first magnetic means in the following direction to apply a traction force to the tip of the rolling rod, and to run the tip when the rod advances on the run-in table. Hold in contact with the in-table. According to the present invention, a plurality of rollers spaced apart in the longitudinal direction extend in the transverse direction of the run-in table and the lift apron, and the rolling rod that has entered the run-in table rides on the rollers and is transported on the rollers to reach the apron. . The second magnetic means is disposed in at least some of the rollers.

Further according to the invention, the control means cooperates with the first and second magnetic means. That is, the first means is energized to apply a braking action to the advancing rod, and the second means is energized when the rolling rod is on the run-in table. Each roller including the second magnetic means is a hollow roller member,
A rotating outer shaft that is hollow and supports the hollow roller member so as to rotate together, a fixed inner shaft that is rotatably supported in the outer shaft, and an electromagnetic coil that is fixed to the inner shaft in the hollow roller member including. According to a feature of the invention, the inner shaft is hollow and the second magnetic means further comprises an electric wire within the inner shaft and connected to the electromagnetic coil. In addition, the hollow inner shaft includes means for transferring the coolant to the electromagnetic coil. Further, the hollow roller member may have a portion that can be attached and detached to expose the electromagnetic coil.

[0008]

1 is a schematic axial view showing a conventional structure of a run-in table. FIG. 2 is a schematic axial view showing another conventional configuration of the run-in table. FIG. 3 is an axial schematic diagram showing a run-in table including one embodiment of the present invention. FIG. 4 is an enlarged sectional view showing the rollers of the run-in table shown in FIG. 3 in detail. FIG. 5 is a view showing an end of the roller of FIG. FIG. 6 includes a lift apron and a cooling floor, FIG.
3 is a schematic cross-sectional view showing the run-in table of FIG.

As shown in FIG. 3, a continuous steel rod is fed from the rolling mill to the flying shear 3 at a considerably high speed. The rolling mill is disclosed in Patent 5,0,0
No. 27,632 is adopted. The shear 3 cuts the rod to form a rod part 1, which is sent to the run-in table 6 shown in FIG. The run-in table 6 is of a double lift apron type and supplies the rod portion 1 to the rake of the cooling floor 60.
The run-in table 6 includes a plurality of longitudinally spaced rollers 5 which are rotatably supported by a fixed frame 7 at an entry end 8 and a downstream end 9 of the table. The rod portion 1 from the shear 3 enters the run-in table 6 on the surface of the roller 5. The arm 10 between the rollers is a frame 7
And oneness. Since the upper surface of the roller 5 is slightly higher than the arm, the portion 1 is surely on the roller 5.

The lift apron 20 approaches the side of the arm 10 of the table 6. The plurality of fingers 21 of the lift apron 20 are moved to a position between the lower position shown by the broken line and the raised position shown by the solid line in FIG.
Can be moved up and down. In the lower position, the upper surface of the finger 21 coincides with the upper surface of the arm 10. Since the surfaces of the finger 21, the roller 5, and the arm 10 are inclined downward in the lateral direction, the rod portion 1 slides down on the roller 5 in the lateral direction on the roller 5 as described later. Finger 2
The electromagnetic pad 4 is constituted by the lower electromagnetic coil 22 of the first electromagnetic coil 1.

At the downstream end 9 of the run-in table 6, the roller 5, the arm 10, the finger 21 of the lift apron 20
There is. The electromagnetic coil 22 is not provided at the downstream end. At an intermediate portion between the upstream end and the downstream end of the run-in table 6,
A roller 5 is provided. The length of the run-in table 6 and the number of rollers are largely determined by the size of the rod portion and the moving speed, as is well known in the art.

The roller 5 at the downstream end 9 of the run-in table 6 includes an electromagnetic coil 11 therein. The hollow cylindrical body 12 of the roller 5 has a hollow rotary shaft 1 supported on a bearing 14.
It is attached to 3. The hollow small shaft 15 is coaxially supported in the shaft 13 through the bearing 16. The bearing is mounted between the shafts 13 and 15. The inner shaft 15 and the electromagnetic coil 11 are fixed. The electric wire 17 passes through the shaft 15 and is connected to the electromagnetic coil 11. The coolant source 18 also communicates with the inside of the shaft 15 to cool the electromagnetic coil 11. The cylindrical body 12 of the roller 5 includes a flange 12a attached to a shaft 13 and a detachable cylindrical portion 12b connected to the flange 12a by bolts 19 so as to approach the inside of the electromagnetic coil 11 and related members. The electromagnetic coils 11 and 22 and the lift apron 20 are connected to control means 23. The control means is a CPU which controls the electromagnetic coils 11 and 22 to control the lift apron 2.
The following control is performed by sequentially increasing and decreasing 0.

The continuous rod has a shear 3 at a relatively high speed.
Supplied to As shown in FIG. 6, the lift apron 20 is in the upper position and the rod rides on the surface of the roller 5 at the entry end 8 of the table. The lift apron 20 in the upper position causes the rod to be centered with the shear roll approximately in the middle of the roller 5. When the tip of the rod 1 reaches the roller 5 at the downstream end of the table, the electromagnetic coil 11 operates to suck the rod and align the tip of the rod with the roller 5. Thus, the head of the rod does not bounce on the roller 5. Shear 3 then cuts the rod and rod section 1
Cut off.

At this time, the roller 5 is rotationally driven by the driving means 24, and the rod portion 1 is accelerated and is released from the adjacent rod end. Next, the lift apron 20 descends, and the electromagnetic coil 11 is turned off. The driving force of the roller 5 stops, and the rod portion 1 slides down on the roller 5 due to gravity and comes into contact with the fixed flange 30. The flange extends in the longitudinal direction of the table frame 7. Next, the electromagnetic coil 22 is energized to apply a braking force to the tail end of the rod portion 1. When the rod portion is slow enough, the lift apron 20 rises to its initial position and the rod portion 1 rises to the top of the flange 30.

Here, the part rolls down in the lateral direction and rides on the next lift apron 40. The second apron is in the upper position and the rod part 1 is held on the flange 30. Therefore, the lift apron 40 descends, and the rod portion 1 rolls down in the lateral direction and hits the rake of the cooling floor 60. As the lift apron 40 is now raised, the rod portion 1 moves to the top of the rake on the cooling floor 60, and thus the rod portion 1 is cooled while stepping over the rake. When the lift apron 20 is raised to the initial position and the rod portion 1 moves to the top of the flange 30, the table is in the initial state, receives the tip of the rod material, and repeats the above operation.

Although the run-in table has been described as a two-stage apron for decelerating the advancing rod section before it reaches the cooling bed, the invention can be embodied as a one-stage lift apron as well. . During continuous operation,
When the control means 23 urges the electromagnetic coil 11, the tip of the rod portion 1 enters the downstream portion 9 and pulls the free tip of the rod portion. When the coil 11 is deenergized, the lift apron 20 descends, and the rod portion 1 rolls down on the fingers 21 of the lift apron 20 without being obstructed. When the electromagnetic coil 22 is energized and a braking force is applied to the rear end of the rod portion, the front end of the portion is stabilized and does not come off. When the lift apron 20 attempts to rise again, the electromagnetic coil 22 is de-energized, so that the rod portion 1 rises undisturbed from the roller 5.

The operation of the electromagnetic coils 11, 22 in the order described above not only maximizes the braking effect, but also causes little damage to the steel rod surface caused by the pinch rollers. At the same time, the rod "bounce effect"
The run-in table has no problem even if the final speed of the rod is considerably increased, thus increasing the productivity and operating reliability.

The number of rollers 5 in the downstream section 9 is determined by the length of the cooling bed and the distance between the rollers. The roller spacing is about 1.5 meters. The downward suction force obtained by the electromagnetic coil 11 in the roller 5 may be relatively low, and it is sufficient that the front end of the rod portion 1 is stabilized.
If it is too strong, the tail end of the rod portion will lift and separate from the roller 5. When the braking force is applied, the tip of the rod portion moving forward tends to move downward toward the roller, so that the braking force by the electromagnetic coil 11 needs to be sufficiently large. In this way, the rod is stabilized on the roller 5 without bouncing. Although the present invention has been described in connection with specific embodiments, it should be understood that various modifications and alterations can be made without departing from the scope and spirit of the invention as set forth in the appended claims.

[Brief description of the drawings]

FIG. 1 is a schematic axial view showing a conventional configuration of a run-in table.

FIG. 2 is an axial schematic view showing another conventional configuration of the run-in table.

FIG. 3 is an axial schematic diagram illustrating a table including one embodiment of the present invention.

FIG. 4 is an enlarged sectional view showing a roller of the table shown in FIG. 3 in detail.

FIG. 5 is a view showing an end of the roller of FIG. 4;

6 is a schematic cross-sectional view showing the run-in table of FIG. 3 including a lift apron and a cooling floor.

Claims (10)

(57) [Claims] In a rolling apparatus for producing rolled rods at a high speed, the rolled rod advances to an entrance end of a run-in table, and when supplied on the run-in table, moves laterally and rides on a lift apron. The first magnetic means cooperates with the lift apron to apply a braking force to the tail end of the rod to reduce the forward speed of the rod, and the second magnetic means Is characterized in that a traction force is applied to the tip of the rod in cooperation with the run-in table located in the downstream direction from the first magnetic means, and the tip of the rod that has been advanced contacts the run-in table. The rolling device to be used. 2. A plurality of rollers spaced apart in the longitudinal direction extend in a transverse direction of the run-in table, and a lift apron is adapted to allow a rolling rod to advance on the run-in table and ride on the roller. The rolling device according to claim 1, wherein the second magnetic means is disposed on at least a part of the roller. 3. The first magnetic means comprises: a magnetic coil disposed below a lift apron between adjacent rollers in the area of the entrance end of the run-in table, when a braking force is applied to a rod that is moving forward. And a braking means provided to actuate the magnetic means, wherein the second magnetic means is connected to a braking means activated when the rolling rod is on the run-in table. A rolling device as described. 4. The roller of claim 1, wherein the roller is inclined downwardly from the run-in table toward the lift apron, the lift apron including a finger between rollers vertically displaced between a lower position and an upper position, and rolling at the lower position. The rod moves down on the roller from the run-in table toward the lift apron, and in the upper position, the rolled rod on the lift apron is lifted from the roller and sent toward the cooling floor, and the braking means moves the lift apron upward from the lower position. The rolling apparatus according to claim 3, wherein the first and second magnetic means are deenergized when moving toward the position. 5. The roller on which the second magnetic means is disposed is a hollow roller member, a hollow rotating outer shaft for supporting the hollow roller member to rotate together, and is rotatably supported in the outer shaft. The rolling apparatus according to claim 2, further comprising a fixed inner shaft, and a magnetic coil fixed to the inner shaft and disposed in a hollow roller member. 6. The inner shaft is hollow, and the second magnetic means further includes an electric wire within the inner shaft and connected to a magnetic coil, the hollow inner shaft moving coolant to the electromagnetic coil. 6. The rolling mill according to claim 5, further comprising means for causing the hollow roller member to include a removable portion for disposing the electromagnetic coil within the hollow roller member. 7. The rolling rod travels axially in the cooling bed to the run-in table through the shearing means, and moves on the surface of each roller which is separated in the longitudinal direction in the run-in table. A downward traction force is applied to the selected roller at the downstream portion of the roller to extrude the leading portion of the axially advancing rolling rod toward the selected roller, the rolling rod moving longitudinally on the roller. Displaced laterally from the run-in table to the lift apron, a braking force is applied to the tail end of the rolling rod moving longitudinally on the lift apron, and then the lift apron is lifted and the rolling rod is moved from the roller. A method of feeding a rolling rod to a cooling floor, wherein the rolling rod is fried and transferred to a cooling floor. 8. The method according to claim 7, wherein the traction force and the braking force are de-energized when the rolling rod is lifted from the roller. 9. The downward traction force is applied to the leading portion of the rolled rod via the selected rollers before the braking force is applied to the tail end portion of the rolled rod, and the downward traction force applied to the rolled rod is the rod. The method according to claim 7, characterized in that the rolling rod is stopped before it is displaced laterally on the lift apron. 10. A rolled rod is cut by a shearing means when its tip is on a roller, pulled down on a roller, and cut by a shearing means during longitudinally accelerated advancement, with the cut tail end of the rod. 8. The method according to claim 7, wherein the rod is moved away from the front.