KR100363404B1 - High speed rolling equipment and delivery method for rolling rod - Google Patents

Abstract

The present invention relates to an apparatus and method for transferring a load section from a flying shear to a cooling bed via a run-in table. Inside the device an electromagnetic coil is located inside the hollow roller at the lower end of the run-in table, attracting the tip of the rod onto the roller and preventing the rod from kicking back. A braking force is applied to the trailing end of the rod before it is lifted up to the cooling bed by the transfer lifting apron.

The roller including the electromagnetic coil is hollow and detachable at the same time so that the electromagnetic coil and the inside of the roller are accessible.

Description

High speed rolling device and delivery method for rolling rod

The present invention relates to an apparatus and a method for transmitting a longitudinal running straight distance to a cooling bed of a rolling rod, and more particularly to an apparatus and a method that can avoid the generation of non-flat in the rolling rod.

The invention also relates to an apparatus and a method for adjusting the longitudinal running straight distance of a rolling rod generated in a rolling mill to high speed.

In the last decades, much progress has been made in the high speed final processing of wire rod products. Among them were the development of torsional road blocks and laying reel coil forming heads. This combination of techniques increased the rolling final processing speed of the rod from 50 meters / second to 100 meters / second. Regarding the rolling of relatively straight bars, there was little development. This was because large bars, for example, rolling up to 12 mm in diameter had no problem. However, for diameters less than 10 mm and 8 mm, the rolling mill operates at low speed and the speed capability is reduced. U. S. Patent No. 5,027, 632 discloses an apparatus and method for feeding a bar into which the bar is rolled to the spiritless without twisting and rolling the bar (so-called NTA system). NTA systems generally increase the final processing speed, but have many problems when small diameter bars are supplied to the cooling bed at high speed.

In essence, the run-in table should be as flat as possible to accept the bars at high speed and to avoid contact with the front ends of the bars with theoretically uneven protrusions. Unfortunately, there are some functions that run-in tables must perform and smooth uninterrupted surfaces are not possible. Systems that require a limitation on the maximum installation length of a near channel system have additional difficulties.

Steel bars entering the run-in table of the cooling bed at high speed require a very long distance to the bar so that it decelerates before it is released on the cooling bed for cooling purposes. Such long distances require an unnecessary increase in construction costs to cover the extra space. The braking distance is proportional to the square of the final processing speed for natural braking. External brakes are fitted to reduce this braking distance.

Two known methods of braking a bar are as follows.

1) braking by pinch rollers (FIG. 1);

The steel bar 1 penetrates through a pair of pinch rollers. The pinch roller 2 is provided for two purposes, the first of which accelerates the bar cut into the length of the cooling bed by the flying shear 3 to separate it from the input bar, and the second of which is released on the latch of the cooling bed. It is to drive in the opposite direction to brake the steel bar (1) until the speed is easy to control before. This method has the disadvantage of damaging the surface of the steel bar. This system eliminates the need for additional rollers with the run-in table of the cooling bed.

2) braking by magnetic pads (FIG. 2);

The magnetic pad 4 is provided below the lifting apron of the run-in table.

As soon as energy is injected into the magnetic pad 4, the bar is decelerated as the friction between the steel bar and the lifting table surface increases. In this arrangement an additional roller 5 is required with the lifting apron to separate the incoming bar after the flying shear 3 and accelerate the cut of the steel bar. The top of the roller 5 should protrude up to the level of the lifting apron in contact with the steel bar. This causes a rebound effect on the steel bar shear when the bar shear hits the top surface of the roller. This is a potential risk of generating non-flatness in the cooling bed.

It is therefore an object of the present invention to provide an apparatus and method for minimizing the recoil effect on a bar.

Another object of the present invention is to achieve the above object without using a pinch roller.

These objects of the present invention are operatively coupled to a lifting apron that applies a braking force to the trailing end of the rolling rod such that the first magnetic means reduces the running speed of the rolling rod, and wherein the second magnetic means has a rod on top thereof. A structure operatively coupled with the run-in table from the first magnetic means in a downward position to apply a force to attract the tip of the rod to keep the tip of the rod in contact with the run-in table when proceeding from Is achieved by.

According to the invention, a plurality of longitudinally spaced rollers are arranged across the run-in table and the lifting apron, in which a rolling rod running against the run-in table is mounted on the roller, the rod being on the roller. Is moved to. The second magnetic means is arranged in at least some rollers.

Further, according to the present invention, the control means operates the first magnetic means when the braking action is applied to the traveling rolling rod, and simultaneously activates the second magnetic means when the rolling rod is positioned on the run-in table. Operatively connected to the second magnetic means.

Each roller including a third magnetic means includes a hollow roller member, a hollow rotatable outer shaft for supporting the hollow roller member rotating therewith, and a fixed inner shaft rotatably supported in the rotatable outer shaft. It consists of an electromagnetic coil which is arranged in the hollow roller member and fixed to the inner shaft.

A feature of the invention is that the inner shaft is hollow and the second magnetic means comprises an electric wire on the inner shaft connected to the electromagnetic coil. In addition, the hollow inner shaft may include a means for transferring the cooling liquid to the electromagnetic coil.

In addition, the hollow roller member may include a detachable portion exposing the electromagnetic coil.

Referring to FIG. 3, a continuous iron rod is fed to a flying shear at a relatively high speed from a rolling apparatus incorporating the NTA method as described in US Pat. No. 5,027,632.

The flying shear 3 cuts the rods that are continuously connected as a load section 1 which is fed to the run-in table 6 shown in FIG. The run-in table is of double lift apron type, which leads the rod section 1 to the latch of the cooling bed 60.

The run-in table 6 comprises a plurality of rollers 5 longitudinally spaced and supported rotatably by a fixed frame 7 at its inlet 8 and downstream of its inlet 9. The rod section 1 coming from the flying shear 3 enters the run-in table while being placed on the surface of the roller 5. Between the rollers 5 there is an arm 10 that is integral with the frame 7. The upper surface of the roller 5 is arranged slightly higher than the arm 10 so that the rod section 1 rests on the roller 5. The lifting apron 20 is adjacent to the side of the arm 10 of the run-in table 6.

The lifting apron 20 comprises a plurality of fingers 21 which are moved by an appropriate drive mechanism between the lower position indicated by the dotted line in FIG. 6 and the raised position indicated by the solid line in FIG. In the lower position, the upper surface of the finger 21 is aligned with the upper surface of the arm 10. The surfaces of the arm 10, the fingers 21 and the rollers 5 are inclined downwardly to the side, so that the rod section 1 is rotated laterally by gravity on the rollers 5 described later. The electromagnetic coil 22 is disposed under the finger 21 and forms the electromagnetic pad 4.

At the lower end 9 of the run-in table 6, a finger 21, a roller 5, and an arm 10 of a lifting apron are arranged. No electromagnetic coil 22 is provided in the downward direction. There is an intermediate part where the roller 5 is located between the upper and lower ends of the table 6. The length of the run-in table and the number of rollers 5 are related to the size of the load sections and their moving speed.

The roller 5 at the lower end 9 of the run-in table 6 has an electromagnetic coil 11 therein. The roller 5 includes a cylindrical hollow body 12 fixed to the hollow rotating shaft 13 installed in the bearing 14. The small hollow shaft 15 is provided in the center of the shaft 13 through the connection portion of the bearing 16 between the shafts 13 and 15. The inner shaft 15 and the coil 11 are fixed, the electric cable 17 passes through the shaft 15 and is connected to the coil 11. The source of the cooling liquid 18 is connected to the inside of the shaft to cool the magnetic field coil. In order to allow access to the interior of the magnetic field coil 11 and its associated components, the cylindrical body 12 of the roller 5 is flanged by a bolt 12 and a flange 12a fixed to the shaft 13. And an attachable cylindrical portion 12b connected to it.

The electromagnetic coils 11 and 22 and the lifting apron 20 continuously control the CPU type to raise or lower the lifting apron 20 or to activate or deactivate the coils 11 and 22 to perform the following operations. It is connected with the means 23.

The continuous rod is provided at a high speed relative to the flying shear 3. The apron 20 is in its raised position as shown in FIG. 6, and the rod rests on the roller surface at the inlet 8 of the run-in table. The rising apron 20 allows the rod to be aligned in the roller of the flying shear in the direction of the center of the roller 5.

When the tip of the rod 1 reaches the roller 5 in the lower direction 9 of the run-in table, the magnetic field coil 11 applies a drag force on the rod and maintains the tip of the rod on the roller 5. This prevents the recoil from the tip of the rod on the roller 5. The flying shear 3 then cuts the rod to separate the rod section 1 from the excess rod stock. The roller 5 is then driven by rotation by the drive means 24 and accelerates the separated rod section 1 so as to space the cut section of the rod section away from the adjacent end of the rod stoke. The lifting apron 20 then descends, the electromagnetic coil 11 is cut off of energy, and the driving of the roller 5 is stopped. Further, the rod section 1 rotates downward by gravity on the roller 5 until the rod section contacts the fixed flange 30 extending in the longitudinal direction along the frame 7 of the run-in table. The magnetic field coil 22 of the magnetic field pad applies a braking force to the tail end of the rod section 1. When the rod section 1 is slowed down sufficiently, the lifting apron 20 rises to its initial position, and the rod section 1 moves over the top of the flange 30, where the rod is flanged ( Rotate laterally relative to the second lifting apron 40 in the raised position to hold the rod section 1 on 30.

The lifting apron 40 is then lowered, and the rod section 1 is adjacent to the latch of the cooling bed 60 in the lateral direction. When the lifting apron 40 then rises, the rod section 1 is moved to the top of the brace of the cooling bed and progresses stepwise over the brace of the bed while the rod cools.

When the lifting apron 20 rises to its initial position and the rod section 1 moves to the top of the flange 30, the run-in table is brought into the initial position to receive the tip of the rod stock, and the same operation is repeated. do.

The run-in table is known for a two-stage lifting apron which cooperates to slowly advance the load section down before moving to the cooling bed. However, the present invention is equally applicable to one stage of lifting apron.

In connection with the series of operations, the control means 23 operates the electromagnetic coil 11 when the leading end of the rod section 1 enters the lower section 9 to apply a pulling force on the free end of the rod section. . When the lifting apron 20 is lowered, the coil 11 is not operated and does not interfere with the lower rotational movement of the rod section 1 on the finger 21 of the lifting apron 20.

When the electromagnetic coil 22 is operated to apply the braking force to the trailing end of the rod section, the tip of the rod section will be stabilized against recoil. When the lifting apron 20 rises again, the coil 22 loses energy, so that it does not interfere with the lifting of the load section 1 from the roller 5.

The operation of the electromagnetic coils 11 and 22 not only minimizes braking but also reduces damage on the surface of the steel rod caused by the pinch roller, and at the same time eliminates the recoil effect of the rod, thereby making the run-in table highly reliable and reliable. It allows to increase the final processing speed of the rod, which leads to productivity.

The rollers 5 in the lower section 9 are present as many as a function of the length of the cooling bed, with the roller spacing being about 1.5 meters. The downward pulling force generated by the electromagnetic coil 11 in the roller 5 is relatively low, and the load section 1 is applied without applying much force to lift the trailing end of the load section from the roller 5. It can stabilize the front end of. The braking force generated by the electromagnetic coil 11 is greater than the force required to move downwards with respect to the roller when the leading end of the traveling rod section is applied with the braking force. Thus, the rod is stabilized on the roller 5 without recoil.

Although the present invention has been described with reference to one embodiment, it will be apparent to those skilled in the art that various changes may be made without departing from the scope of the present invention.

1 is a cross-sectional view schematically showing the structure of a conventional run-in table.

2 is a cross-sectional view schematically showing the structure of another conventional run-in table.

3 is a schematic cross-sectional view of a run-in table showing an embodiment of the present invention.

4 is an enlarged cross-sectional view of the roller of the run-in table of FIG.

5 is a cross-sectional view of the roller of FIG. 4 and

6 is a schematic cross-sectional view of the run-in table of FIG. 3 with a lifting apron and a cooling bed.

* Explanation of symbols used in the main part of the drawing

1: rod section

3: flying shear

5: roller

6: run-in table

9: Downward section

10: arm

11, 22: electromagnetic coil

12: hollow body

14: bearing

15: Small Hollow Shaft

20: lifting apron

21: finger

23: control means

30: flange

40: apron

60: brace

Claims (10)

Rolling rod for high-speed production of rolling rods, which proceed to the runtable inlet end and after the rolling rods are fed on the run-in table, the rods are laterally moved on the aprons for subsequent transport and braking towards the cooling bed. To The first magnetic means is operatively coupled with a lifting apron that applies a braking force to the trailing end of the rolling rod to reduce the traveling speed of the rolling rod, wherein the second magnetic means contacts the run-in table when the rod proceeds. Rolling for high speed production of the rolling rod, characterized in that it is operatively coupled with the run-in table at a position spaced downwardly from the first magnetic means to apply a pulling force to the tip of the rolling rod to maintain the tip of the rod. Device. The roller of claim 1, wherein the plurality of longitudinally spaced rollers are aligned across a run-in table and a repeating apron and a rolling rod running to the run-in table is mounted on the rollers, wherein the rods are mounted on the rollers. Rolling apparatus for high-speed production of the rolling rod, characterized in that it is conveyed to the lifting apron, the second magnetic means is arranged in at least some of the rollers. 3. The magnetic device of claim 2, wherein the first magnetic means includes a magnetic pad disposed below the lifting apron between successive rollers in the inlet end region of the run-in table, and the control means is adapted to be applied to the rod in which the braking action is in progress. A first magnetic means, said second magnetic means being connected to said control means operated when said rolling rod is on a run-in table. The method of claim 2. The roller is inclined downward from the run-in table to the lifting apron, the lowered position in which the rolling rod moves downward on the roller from the run-in table to the lifting apron and the rolling rod on the leaf tongue apron is lifted from the roller to be transferred to the cooling bed. And a finger located between the rollers, the finger being movable vertically between the raised positions, wherein the control means do not operate the first and second magnetic means when the lifting apron moves from the lowered position to the raised position. Rolling apparatus for high speed production of rolling rods. 3. The roller according to claim 2, wherein each of the rollers on which the second magnetic means is disposed comprises: a hollow member, a hollow rotatable outer shaft for supporting the hollow roller member for rotation, and a fixed inside supported in the rotatable outer shaft. And a shaft and an electromagnetic coil disposed in the hollow roller member and fixed to the inner shaft. The method of claim 5, wherein the inner shaft is hollow, the second magnetic means further comprises an electric wire in the inner shaft connected to the electromagnetic coil, the hollow inner shaft for conveying a cooling liquid to the electromagnetic coil And means wherein said hollow roller member comprises a separable portion for exposing said electromagnetic coil in said hollow roller member. A method of transferring a longitudinally extending distance of a rolling rod into a cooling bed, wherein the rolling rod is advanced in a longitudinal direction to a run-in table in which the rod is moved on a vertically spaced roller surface through a shearing means. A downward pull through one of the rollers selected downstream of the run-in table is applied to advance the leading end of the longitudinally forward rolling rod relative to the selected roller, While the rolling rod is advanced in the longitudinal direction, the rolling rod is moved laterally along the roller with a lifting apron at the run-in table, Braking force is applied to the trailing end of the longitudinal advancement distance of the rolling rod on the lifting apron, Thereafter, the lifting apron is raised to lift the rolling rod from the roller to the cooling bed. 8. The method of claim 7, wherein the downward pulling force and the braking force are not operated when the rolling rod is lifted by the lifting apron from the roller. 8. The load according to claim 7, wherein the downward pulling force is applied to the leading end of the rolling rod through a selected one of the rollers before the braking force is applied to the trailing end of the rolling rod, and the rod is laterally on the lifting apron. The transfer method of the rolling rod, characterized in that the application of the downward pull before the movement is stopped. 8. The rod according to claim 7, wherein when the tip of the rolled rod is on the roller and is pulled downward on the roller, the longitudinal running distance of the rolled rod is such that the cutting tail of the rolled rod is spaced from the extra tip of the rod. A method of transferring a rolling rod, characterized in that it is accelerated when cut by shearing means.