KR200202393Y1 - Apparatus for correcting serpentine running of strip by using magnets - Google Patents

Abstract

The present invention relates to a strip meander prevention device for preventing meandering of the strip in the loop pit when performing a loop type side trimming operation for removing both ends of the strip in the manufacture of cold rolled steel sheet. The guide roll is movable in the width direction of the strip, and the magnetic force is applied to both ends of the support roll supporting the lower surface of the strip so that the strip is in close contact, thereby achieving stable cutting during trimming of the strip, and preserving the quality of the strip. The present invention relates to a strip meandering device using a magnet improved to improve work productivity.

The present invention is a device for preventing meandering of the strip in the side trimming operation to remove both ends of the strip in the production of cold rolled steel sheet, to form a hollow space inside the both ends of the support roll, and to move the magnet inside the space By positioning, the strip meandering device is configured to be movable in close contact with the outer surface of the support roll by magnetic force.

Description

Strip meandering device using magnets {APPARATUS FOR CORRECTING SERPENTINE RUNNING OF STRIP BY USING MAGNETS}

The present invention relates to a strip meander prevention device for preventing the meandering of the strip in the loop pit when performing a loop type side trimming operation for cutting both edges of the strip in the manufacture of cold rolled steel sheet, and more specifically, both sides of the strip. It has a guide roll movable in the width direction of the strip, and by applying a magnetic force to both ends of the support roll for supporting the lower surface of the strip to ensure that the strip is in close contact to achieve a stable cutting operation during the trimming of the strip, to preserve the quality of the strip In addition, the present invention relates to a strip meandering device using a magnet improved to improve work productivity.

In general, in the process of manufacturing cold rolled steel sheet, there is a side trimming process in which both edges of the strip are cut and removed according to the customer's order specification. Such a side trimming process includes a loop method and a tension method, and FIG. 1 illustrates a loop method among these methods.

That is, in the loop method, the strip S is kept in a long stretched state in the loop pit 100, and side trimmers 110 are disposed at the inlet side of the loop pit 100 so that both sides of the strip S pass therethrough. To cut the edges. Since the side trimmer 110 as described above is well known in the steel industry, a detailed description thereof will be omitted herein.

In such a side trimming process, a meandering phenomenon in which the strip S moves while meandering in the width direction during side trimming occurs in the loop pit 100 so that an accurate cutting operation of the edge of the strip S can be achieved. It was not. The strip S is positioned in its width direction only by providing a pair of guide rolls 120 at the exit of the loop pit, by pushing both edges of the strip S so that the strip S moves in line with the center line of the movement line. It was calibrated and side trimmed.

However, in the conventional working method as described above, when the guide roll 120 contacts both edges of the strip S, the shock is applied to both edges of the strip S by not having a separate cushioning means, thereby causing damage. It was to cause.

In addition, the strips (S) whose both edges are broken by the guide rolls (120) damage the rubber coating layer of the strip support rolls due to their sharp edges, and thus, the strips (S) passing through the support rolls as well as damage to the equipment. ) Also had a problem of poor quality and deteriorated quality.

The present invention was devised to solve the above problems, the purpose of which is to move in a state in close contact with the support roll in the center of the strip when moving to achieve a stable cutting operation during the trimming of the strip, to preserve the quality of the strip In addition, the present invention provides a strip meander prevention device using an improved magnet to improve productivity of edge cutting work.

1 is a block diagram showing a general strip process according to the prior art;

Figure 2 is a perspective view showing a strip meandering device using a magnet according to the present invention;

3 is a cross-sectional view of the support roll provided in the strip meandering device using a magnet according to the present invention.

Explanation of symbols on the main parts of the drawings

5 ..... support roll 10 ..... space

14 .... Magnet 20 ..... Guide Roll

23 .... drive motor 25 .... screw shaft

30 .... Slide Rod 32 .... Casing

38 .... Slide Block 42 .... Moving Block

47 .... Box member 62 .... Rubber coating layer

66 .... Bracket 70 .... Sensor

100 ... loop feet 110 ... side trimmer

S ..... strip

In order to achieve the above object, the present invention is a strip meander prevention device for preventing meandering of the strip in the side trimming operation to remove both ends of the strip during the production of cold rolled steel sheet, both ends of the support roll in the hollow space By forming and moving the magnet to the interior of the space, by providing a strip meandering device configured to be movable in close contact with the outer surface of the support roll by the magnetic force.

In addition, the present invention is to provide a strip meandering device, characterized in that the guide rolls which are respectively positioned on both sides of the strip are elastically close to the edges of the strip by mounting a spring on its rear surface.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Strip meandering device (1) according to the present invention is a support roll for rotationally supporting the strip (S) in the center of the strip (S) transfer line in the side trimming operation to remove both ends of the strip (S) in the production of cold rolled steel sheet (5) There are a plurality of them. As described above, the strip meandering device 5 of the present invention proceeds by placing the strip S on the upper side of the support roll 5 so that the plurality of support rolls 5 are rotationally driven. In addition, by forming a hollow space (10) inside both ends of the support roll (5), by moving the magnet 14 to the interior of the space 10, the strip (S) by the magnetic force support roll It is configured to be in close contact with the outer surface of (5) and to be movable.

The meandering prevention device 1 of the present invention has a pair of guide rolls 20 disposed on both sides of the support roll 5, as shown in Fig. 2, to move them in the width direction of the strip S. It has a drive motor 23 and a screw shaft 25 for.

The guide rolls 20 are disposed so as to be rotatable in an upright direction on each side of the strip (S), the width direction of the strip (S) in the upper side of the frame (3) of the strip meander prevention device (1) of the present invention Casings 32 are disposed to face each other at centers of the plurality of slide rods 30 that cross each other, and the guide rolls 20 are vertically mounted inside the casings 32, and both sides of the casings 32. A sliding block 38 is formed in the sliding rod 30 so as to be slidable, respectively, and the casing 32 and the guide roll 20 are stripped by the sliding block 38 and the sliding rod 30. (S) It is guided linearly in the width direction.

And, at the lower edge of the casing 32, a moving block 42 screwed to the screw shaft 25 capable of forward and reverse rotation by the motor 23 at the lower side of the strip S is formed, respectively. When the screw shaft 25 is rotated by the drive motor 23 because the screw shaft 25 is formed with the left screw portion 25a and the right screw portion 25b around the intermediate point thereof, The guide rolls 20 arranged on both sides are mounted to move toward or away from both sides of the strip S at the same time by the moving block 42 at the same time (see arrows in FIG. 2).

On the other hand, the guide rolls 20 located inside the rectangular casing 32 each have a box member 47 in which they are mounted upright so as to be rotatable, and guide protrusions 50 are formed from both sides of the box member 47. Is coupled to slide to guide grooves 52 formed on both sides of the casing 32, the back of the box member 47 is supported by a plurality of springs 55 between the inner surface of the casing (32) You have a structure. Accordingly, when the casing 32 is rotated by the drive motor 23 and the screw shaft 25 is moved along the slide rod 30 accordingly, the casing 32 and the box member 47 inside the casing 32 are formed. The guide rolls 20 are all moved, and when the upright guide rolls 20 are in contact with both edges of the strip S, due to the spring 55 disposed between the box member 47 and the casing 32. Absorb the impact force and will not damage the edge of the strip (S).

On the other hand, the support rolls 5 are rotatably mounted on the slide rods 30 through a plurality of bearings 60, respectively, as shown in cross section in FIG. 3, and a rubber coating layer 62 on the outer circumferential surface thereof. And hollow annular spaces 10 are formed at both end portions of the support roll 5, respectively. In addition, magnets 14 each having a shape corresponding to and adjacent to the annular space 10 and having a somewhat smaller size are disposed, and these slide blocks 38 of the casing 32 are provided through the brackets 66. It is connected to the front. In addition, the magnet 14 forms a hole 14a in the center so that the slide rod 30 is positioned in the non-contact state therein, so that the magnets 14 move along the left and right sides of the casing 32. It can be seen that it is movable at the same time and is not in contact with the sliding rod 30.

On the other hand, the front side of the frame (3) is equipped with a detection sensor 70 for detecting both edges of the strip (S) to enter the upper side of the support roll (5), these sensors 70 is a strip ( By detecting both edges of the strip S mounted on the lower side of S) and advancing to the upper side thereof, if the edges of the strip S are detected by all of these sensors 70, they are detected in the strip S moving line. The driving motor 23 for moving the guide rolls 20, which is determined to pass through the center, is electrically connected to stop the operation.

Strip meandering device (1) of the present invention configured as described above is the strip (S) is meandering the strip (S) in the loop pit 100 during the process of cutting the edge by the side trimmer (110) In this case, the strip S is not detected by all of the sensors 70 located on the upstream side of the support roll 5, but only in any one of them. In this case, the control computer (not shown) of the strip transfer line recognizes the meandering of the strip S, and rotates the screw shaft 25 through the drive motor 23. In this case, the rotation of the screw shaft 25 causes the casings 32 to move toward the moving line side of the strip S through the moving blocks 42 provided on the lower side of the casing 32, resulting in a strip S. One of the guide rolls 20 on both sides pushes one edge of the strip S, and the strip S is moved to the center of the strip moving line.

At the same time, as the casings 32 are moved to the center, the magnets 14 connected to the sliding blocks 38 of the casing 32 through the brackets 66 are also moved at the same time so that both ends of the support roll 5 are moved. By entering the annular space 10, the strip S is brought into close contact with its outer circumferential surface at both ends of the support roll 5 through its magnetic force.

In addition, when the strip S is moved to the center of the strip moving line as described above, the strip 70 detects all the strips S in the sensor 70, so that the strip transfer line control computer (not shown) By stopping the driving of the motor 23 by determining that the strip S meandering is completed, the movement of the strip width direction of the guide roll 20 and the magnets 14 is stopped.

Therefore, if the above state is maintained for a certain time, the strip S is moved to the center of the strip moving line so that both edges are supported by the guide rolls 20, and at the same time both ends of the support roll 5 The magnets 14 located in the state are brought into close contact with the support roll 5 so that both edges of the strip S are cut in a stable state.

When the cutting edge of the strip is made in such a stable state, the error of the cutting operation is greatly reduced to enable accurate cutting, the quality of the cutting surface after cutting is improved, and the cutting pieces cut from the strip edge are strips (S). By not interrupting the progress of the cutting operation or interrupting the cutting operation can be achieved.

According to the present invention as described above, both ends of the support roll (5) having a guide roll 20 that is movable in the width direction of the strip (S) on both sides of the strip (S), supporting the lower surface of the strip (S) The magnetic force is applied to the strip S so that the strip S is in close contact with the support roll 5 at the center of the strip S. Thus, an improved effect is obtained to achieve a stable cutting operation in trimming the strip S, to preserve the quality of the strip S, and to improve the productivity of the strip S edge cutting operation.

Claims (3)

In the strip (S) meandering prevention device for preventing meandering of the strip (S) in the side trimming operation to remove both ends of the strip (S) in the production of cold rolled steel sheet, A hollow space 10 is formed inside both ends of the support roll 5, and the magnet S 14 is positioned by moving the magnet 14 into the space 10 so that the strip S is supported by the magnetic force. Strip meandering device, characterized in that configured to move in close contact with the outer surface of the. The driving motor 23 and the screw shaft (1) according to claim 1, further comprising a pair of guide rolls (20) arranged on both sides of the support roll (5), and for moving them in the width direction of the strip (S). 25, the guide rolls 20 are disposed on both sides of the strip S so as to be rotatable in an upright position, and when the screw shaft 25 is rotated by the drive motor 23, The guide rolls 20 arranged on both sides are moved to simultaneously approach or simultaneously move away from both sides of the strip S to the strip S side, and the guide rolls 20 are casing connected to the screw shaft 25. Strip meandering device, characterized in that configured to be elastically supported by a plurality of springs (55) between the inner surface of (32). 2. An upstream side of the support roll (5) according to claim 1, wherein detection sensors (70) for detecting both edges of the strip (S) are mounted, and these sensors (70) are located on the lower side of the strip (S). By detecting both edges of the strip S mounted and proceeding to its upper side, if the edges of the strip S are detected by all of these sensors 70, the strip is determined to pass through the center of the strip movement line and guided. Strip meander prevention device, characterized in that configured to stop the operation of the drive motor (23) for moving the roll (20).