Strip steel upper and lower uncoiling device and strip steel upper and lower uncoiling method

Abstract

The upper and lower strip steel uncoiling device comprises a first magnetic force belt mechanism and a second magnetic force belt mechanism, the first magnetic force belt mechanism comprises a first rack, a first magnetic force belt, two first tensioning rollers and a first pressing roller, the first magnetic force belt is connected to the two first tensioning rollers in a sleeving mode, and the second magnetic force belt is connected to the second rack in a sleeving mode; the first pressing roller is located at the front end of the first magnetic belt, and the first rack is connected with a first driving part used for driving the first magnetic belt mechanism to swing up and down; the second magnetic belt mechanism comprises a second rack, a second magnetic belt, five second tensioning rollers and a second pressing roller, the five second tensioning rollers are sleeved with the second magnetic belt, the second pressing roller is located at the front end of the second magnetic belt, and the second rack is connected with a second driving part and a third driving part; the second driving part is used for driving the second magnetic belt mechanism to swing up and down, and the third driving part is used for driving the second tensioning roller to stretch out and draw back in the front-back direction. The device can prevent the steel coil from generating indentations.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to an upper and lower uncoiling device for cold-rolled steel strip and an upper and lower uncoiling method for the steel strip. Background Art

[0002] In cold rolling production lines, unwinding devices such as clamps, strip-threading guides, and magnetic belts are usually used to pull the strip from the unwinder to the next device (such as a pinch roller). These devices have not been able to achieve the automatic unwinding and threading process of the strip well, especially the automatic up and down unwinding of thin strips (thickness less than 0.2mm). At present, for the automatic unwinding method of thin strips, the CN104138930B patent has disclosed a new type of retractable magnetic belt unwinder, which has a traction plate at the end of the unwinder. During the reversal of the strip, the traction plate presses against the steel coil, which easily leaves an indentation on the thin strip; if the traction plate does not press against the steel coil, the steel coil head is easy to loosen, scatter, and stack, and automatic unwinding cannot be achieved. Summary of the invention

[0003] The present invention aims to provide an upper and lower unwinding device for a strip steel to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a strip upper and lower unwinding device, comprising a first magnetic belt mechanism and a second magnetic belt mechanism respectively arranged up and down, the first magnetic belt mechanism comprising a first frame and a first magnetic belt arranged on the first frame, two first tensioning rollers, and a first pressure roller, the first magnetic belt is annularly sleeved on the two first tensioning rollers, the first pressure roller is located at the front end of the first magnetic belt, the first frame is connected with a first driving member for driving the first magnetic belt mechanism to swing up and down; the second magnetic belt mechanism comprises a second frame and a second magnetic belt arranged on the second frame, five second tensioning rollers, and a second pressure roller, the second magnetic belt is annularly sleeved on the five second tensioning rollers, the second pressure roller is located at the front end of the second magnetic belt, the second frame is connected with a second driving member and a third driving member, the second driving member is used to drive the second magnetic belt mechanism to swing up and down, and the third driving member is used to drive the second tensioning roller at the front end of the top side and the middle to perform telescopic movement along the front-to-back direction to achieve the length adjustment of the second magnetic belt at the top side position.

[0005] Preferably, the five second tensioning rollers are second tensioning roller A, second tensioning roller B, second tensioning roller C, second tensioning roller D, and second tensioning roller E, wherein second tensioning roller A and second tensioning roller B are respectively located at the front and rear ends of the top side, second tensioning roller C and second tensioning roller D are respectively located at the front and rear ends of the bottom side, second tensioning roller E is located between the second tensioning roller on the top side and the second tensioning roller on the bottom side, and the telescopic hydraulic cylinder drives the second tensioning roller A to perform telescopic movement together with the second tensioning roller E in the front and rear direction to realize the length adjustment of the second belt at the top side.

[0006] Preferably, the first driving member, the second driving member and the third driving member are telescopic hydraulic cylinders or pneumatic cylinders.

[0007] Preferably, it also includes a fixed frame and a steering pinch roller respectively located at the rear sides of the first magnetic belt mechanism and the second magnetic belt mechanism, the swing hinge of the first magnetic belt mechanism is set at the fixed frame, and the swing hinge of the second magnetic belt mechanism is set at the steering pinch roller.

[0008] Preferably, it also includes a swing arm and an uncoiler body, the steering pinch roller includes a pinch roller body, a fixed base and a roller, and the pinch roller body is connected to the uncoiler body through the swing arm.

[0009] Preferably, a belt head recognition sensor is provided in the middle of the first magnetic belt and the second magnetic belt.

[0010] Preferably, the tape head recognition sensor is a photoelectric sensor.

[0011] Preferably, the first magnetic belt comprises a first belt and a first magnet disposed in the first belt, and the second magnetic belt comprises a second belt and a second magnet disposed in the second belt.

[0012] Preferably, the first magnet and the second magnet are permanent magnets or electromagnets.

[0013] The present invention also provides a strip upper and lower uncoiling method, comprising any of the strip upper and lower uncoiling devices described above, wherein the strip upper uncoiling method comprises the following steps:

[0014] S1. The strip steel is a steel coil wound from inside to outside in a counterclockwise direction. The first magnetic belt mechanism swings downward so that the first pressure roller abuts against the upper side of the steel coil. Then the second magnetic belt mechanism swings upward so that the second magnetic belt is located below the strip steel passing line to assist in unwinding.

[0015] S2, the uncoiler rotates clockwise, and the first magnetic belt absorbs the freely moving steel coil head. The first magnetic belt rotates clockwise, and the uncoiler and the second magnetic belt rotate counterclockwise at the same time, so that the strip is automatically transported backward until it is transported to the next device;

[0016] S3, the first magnetic belt swings upward and lifts up, weakening the adsorption force on the steel coil head, and the steel coil head and the first magnetic belt are automatically separated, completing the automatic unwinding process of the steel strip;

[0017] The strip uncoiling method comprises the following steps:

[0018] S1. The strip steel is wound from the inside to the outside in a clockwise direction. The first magnetic belt mechanism swings upward to make way for the steel coil, and the second magnetic belt mechanism swings to a corresponding position. The second magnetic belt extends forward, so that the second pressure roller abuts against the rear side of the center height position of the steel coil, and the steel coil car rises to hold the steel coil;

[0019] S2. The uncoiler rotates counterclockwise, so that the 1 / 4 arc-length steel coil head peels off the steel coil and is adsorbed on the second magnetic belt. Then the second magnetic belt swings downward, so that the 1 / 2 arc-length steel coil head stretches freely between the steel coil car roller and the second magnetic belt, forming a natural streamline.

[0020] S3. The uncoiler rotates clockwise and the second magnetic belt rotates counterclockwise, so that the strip is automatically transported backward until it is transported to the next device, completing the automatic uncoiling process of the strip.

[0021] The present invention has the following beneficial effects:

[0022] When uncoiling the strip, the first pressure roller of the first magnetic belt mechanism is pressed against the steel coil, and then the first magnetic belt, the second magnetic belt and the uncoiling machine rotate in coordination with each other to realize the backward conveying and uncoiling of the strip; when uncoiling the strip, the second pressure roller of the second magnetic belt mechanism is pressed against the steel coil, and then the second magnetic belt and the uncoiling machine rotate in coordination with each other to realize the backward conveying and uncoiling of the strip. This technical solution can ensure that no scratches are caused when pressing against the steel coil, avoid leaving indentations on thin strips, and at the same time prevent the steel coil head from loosening, scattering, and stacking, thereby ensuring the smooth completion of the automated upper and lower uncoiling of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the process of unwinding a steel strip by the first magnetic belt mechanism of an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the process in which the second magnetic belt mechanism of an embodiment of the present invention assists the first magnetic belt mechanism in unwinding the strip.

[0025] Figure 3 It is one of the schematic diagrams of the process of uncoiling the strip according to the embodiment of the present invention.

[0026] Figure 4This is the second schematic diagram of the process of uncoiling the strip according to the embodiment of the present invention.

[0027] The accompanying drawings are marked as follows: 1. First magnetic belt mechanism; 1.1. First driving member; 1.2. First belt; 1.3. First magnet; 1.4. First tensioning roller; 1.5. First pressure roller; 2. Second magnetic belt mechanism; 2.1. Second driving member; 2.2. Third driving member; 2.3. Second belt; 2.4. Second magnet; 2.5. Second tensioning roller; 2.51. Second tensioning roller A; 2.52. Second tensioning roller B; 2.53. Second tensioning roller C; 2.54. Second tensioning roller D; 2.55. Second tensioning roller E; 2.6. Second pressure roller; 3. Steel coil; 4. Steel coil head; 5. Steel coil car roller. DETAILED DESCRIPTION

[0028] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 1-4As shown, as an embodiment of the present invention, a strip upper and lower unwinding device is provided, comprising a first magnetic belt mechanism 1 and a second magnetic belt mechanism 2 respectively arranged up and down, the first magnetic belt mechanism 1 comprising a first frame and a first magnetic belt arranged on the first frame, two first tensioning rollers 1.4, and a first pressure roller 1.5, the first magnetic belt is annularly sleeved on the two first tensioning rollers 1.4, the first pressure roller 1.5 is located at the front end of the first magnetic belt, the first frame is connected to a first driving member 1.1, which is used to drive the first magnetic belt mechanism 1 to swing up and down; the second magnetic belt mechanism 2 comprises a second frame and a second magnetic belt arranged on the second frame , five second tensioning rollers 2.5, a second pressure roller 2.6, the second magnetic belt is annularly sleeved on the five second tensioning rollers 2.5, the second pressure roller 2.6 is located at the front end of the second magnetic belt, the second frame is connected with a second driving member 2.1 and a third driving member 2.2, the second driving member 2.1 is used to drive the second magnetic belt mechanism 2 to swing up and down, the third driving member 2.2 is used to drive the second tensioning roller 2.5 at the front end of the top side and the middle to perform telescopic movement along the front and rear direction to achieve the length adjustment of the second magnetic belt at the top side position, a liftable steel coil car roller 5 is arranged in front of the second magnetic belt mechanism 2, and a steel coil 3 is installed on the top of the steel coil car roller 5. When uncoiling the strip, the first pressure roller 1.5 of the first magnetic belt mechanism 1 is pressed against the steel coil 3, and then the first magnetic belt, the second magnetic belt and the uncoiler rotate in coordination with each other to realize the backward conveying and uncoiling of the strip; when uncoiling the strip, the second pressure roller 2.6 of the second magnetic belt mechanism 2 is pressed against the steel coil 3, and then the second magnetic belt and the uncoiler rotate in coordination with each other to realize the backward conveying and uncoiling of the strip. This technical solution can ensure that no scratches are caused when pressing against the steel coil 3, and is particularly suitable for uncoiling thin strips (strips with a thickness of less than 0.2 mm), avoiding leaving indentations on thin strips, and at the same time preventing the steel coil head from loosening, scattering, and stacking, thereby ensuring the smooth completion of the automated upper and lower uncoiling work.

[0032] In this embodiment, the five second tensioning rollers 2.5 are respectively the second tensioning roller A2.51, the second tensioning roller B2.52, the second tensioning roller C2.53, the second tensioning roller D2.54, and the second tensioning roller E2.55, wherein the second tensioning roller A2.51 and the second tensioning roller B2.52 are respectively located at the front and rear ends of the top side, the second tensioning roller C2.53 and the second tensioning roller D2.54 are respectively located at the front and rear ends of the bottom side, and the second tensioning roller E2.55 is located between the second tensioning roller 2.5 on the top side and the second tensioning roller 2.5 on the bottom side, and the telescopic hydraulic cylinder drives the second tensioning roller A2.51 and the second tensioning roller E2.55 to perform telescopic movement along the front and rear direction to realize the length adjustment of the second belt 2.3 at the top side.

[0033] In this embodiment, the first driving member 1.1, the second driving member 2.1 and the third driving member 2.2 are telescopic hydraulic cylinders or pneumatic cylinders.

[0034] In this embodiment, it also includes a fixed frame and a steering pinch roller respectively located at the rear sides of the first magnetic belt mechanism 1 and the second magnetic belt mechanism 2. The swing hinge of the first magnetic belt mechanism 1 is set at the fixed frame, and the swing hinge of the second magnetic belt mechanism 2 is set at the steering pinch roller.

[0035] In this embodiment, it also includes a swing arm and a uncoiler body. The steering pinch roller includes a pinch roller body, a fixed base and a roller. The pinch roller body is connected to the uncoiler body through the swing arm. This arrangement allows the second magnetic belt and the steering pinch roller to float with the uncoiler body, which can effectively prevent wrinkles from forming on thin strip steel during the uncoiling and centering process.

[0036] In this embodiment, a belt head recognition sensor is provided in the middle of the first magnetic belt and the second magnetic belt to ensure reliable control of the belt head. Specifically, the belt head recognition sensor is a photoelectric sensor. Of course, it can also be other inductive sensors, which are not limited here.

[0037] In this embodiment, the first magnetic belt includes a first belt 1.2 and a first magnet 1.3 disposed in the first belt 1.2, and the second magnetic belt includes a second belt 2.3 and a second magnet 2.4 disposed in the second belt 2.3. Specifically, the first magnet 1.3 and the second magnet 2.4 are permanent magnets or electromagnets.

[0038] The present invention also provides a strip upper and lower uncoiling method, comprising the strip upper and lower uncoiling device described in the above embodiment, wherein the strip upper uncoiling method comprises the following steps:

[0039] S1, the strip is a steel coil 3 wound from the inside to the outside in a counterclockwise direction, the first magnetic belt mechanism 1 swings downward, so that the first pressure roller 1.5 is against the upper side of the steel coil 3, and then the second magnetic belt mechanism 2 swings upward, so that the second magnetic belt is located below the strip passing line to assist in unwinding, such as Figure 1 As shown;

[0040] S2, the uncoiler rotates clockwise, and the first magnetic belt absorbs the freely moving steel coil head 4. When the head recognition sensor recognizes that the steel coil head 4 is absorbed, the first magnetic belt rotates clockwise, and the uncoiler and the second magnetic belt rotate counterclockwise, so that the strip is automatically transported backward until it is transported to the next device (such as a pinch roller);

[0041] S3, the strip head detection device captures the steel strip head 4 and clamps the strip, the first magnetic belt swings upward and lifts up, weakening the adsorption force on the steel strip head 4, and the steel strip head 4 and the first magnetic belt are automatically separated. Figure 2 As shown, the automatic uncoiling process of the strip is completed;

[0042] The strip uncoiling method comprises the following steps:

[0043] S1, the strip steel is wound from the inside to the outside in a clockwise direction, the first magnetic belt mechanism 1 swings upward to make way for the steel coil 3, the second magnetic belt mechanism 2 swings to the corresponding position, the second magnetic belt extends forward, so that the second pressure roller 2.6 abuts against the rear side of the center height position of the steel coil 3, as shown in FIG. Figure 3 As shown, the steel coil car rises and holds the steel coil 3;

[0044] S2, the uncoiler rotates counterclockwise, so that the 1 / 4 arc length of the steel coil head 4 peels off the steel coil 3 and is adsorbed on the second magnetic belt. When the head recognition sensor recognizes the steel coil head 4, the second magnetic belt swings downward, so that the 1 / 2 arc length of the steel coil head 4 is freely stretched between the steel coil car roller 5 and the second magnetic belt, forming a natural streamline, such as Figure 4 As shown;

[0045] S3, the uncoiler rotates clockwise, and the second magnetic belt rotates counterclockwise, so that the strip is automatically transported backward until it is transported to the next device (such as the pinch roller), completing the automatic uncoiling process of the strip.

[0046] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. An upper and lower unwinding device for a strip, characterized in that: The invention comprises a first magnetic belt mechanism and a second magnetic belt mechanism which are respectively arranged up and down, the first magnetic belt mechanism comprises a first frame and a first magnetic belt, two first tensioning rollers and a first pressure roller arranged on the first frame, the first magnetic belt is annularly sleeved on the two first tensioning rollers, the first pressure roller is located at the front end of the first magnetic belt, the first frame is connected with a first driving member for driving the first magnetic belt mechanism to swing up and down; the second magnetic belt mechanism comprises a second frame and a second magnetic belt, five second tensioning rollers and a second pressure roller arranged on the second frame, the second magnetic belt is annularly sleeved on the five second tensioning rollers, the second pressure roller is located at the front end of the second magnetic belt, the second frame is connected with a second driving member and a third driving member, the second driving member is used to drive the second magnetic belt mechanism to swing up and down, and the third driving member is used to drive the second tensioning roller at the front end of the top side and the middle part to perform telescopic movement along the front-to-back direction to realize the length adjustment of the second magnetic belt at the top side position.

2. The upper and lower unwinding devices for strip steel according to claim 1 are characterized in that: The five second tensioning rollers are respectively the second tensioning roller A, the second tensioning roller B, the second tensioning roller C, the second tensioning roller D, and the second tensioning roller E, wherein the second tensioning roller A and the second tensioning roller B are respectively located at the front and rear ends of the top side, the second tensioning roller C and the second tensioning roller D are respectively located at the front and rear ends of the bottom side, the second tensioning roller E is located between the second tensioning roller on the top side and the second tensioning roller on the bottom side, and the telescopic hydraulic cylinder drives the second tensioning roller A to perform telescopic movement together with the second tensioning roller E in the front and rear direction to realize the length adjustment of the second belt at the top side.

3. The upper and lower unwinding devices for strip steel according to claim 1 are characterized in that: The first driving member, the second driving member and the third driving member are telescopic hydraulic cylinders or air cylinders.

4. The upper and lower unwinding devices for strip steel according to claim 1 are characterized in that: It also includes a fixed frame and a steering pinch roller respectively located at the rear sides of the first magnetic belt mechanism and the second magnetic belt mechanism. The swing hinge of the first magnetic belt mechanism is arranged at the fixed frame, and the swing hinge of the second magnetic belt mechanism is arranged at the steering pinch roller.

5. The upper and lower unwinding devices for strip steel according to claim 4 are characterized in that: It also includes a swing arm and an uncoiler body. The steering pinch roller includes a pinch roller body, a fixed base and a roller. The pinch roller body is connected to the uncoiler body through the swing arm.

6. The upper and lower unwinding devices for strip steel according to claim 1 are characterized in that: The middle parts of the first magnetic belt and the second magnetic belt are provided with belt head recognition sensors.

7. The upper and lower unwinding devices for strip steel according to claim 6 are characterized in that: The belt head recognition sensor is a photoelectric sensor.

8. The upper and lower unwinding devices for strip steel according to claim 1 are characterized in that: The first magnetic belt includes a first belt and a first magnet arranged in the first belt, and the second magnetic belt includes a second belt and a second magnet arranged in the second belt.

9. The upper and lower unwinding devices for strip steel according to claim 8 are characterized in that: The first magnet and the second magnet are permanent magnets or electromagnets.

10. A method for unwinding a steel strip, characterized in that: The strip upper and lower uncoiling devices include any one of claims 1 to 9, wherein the strip upper uncoiling method includes the following steps: S1. The strip steel is a steel coil wound from inside to outside in a counterclockwise direction. The first magnetic belt mechanism swings downward so that the first pressure roller abuts against the upper side of the steel coil. Then the second magnetic belt mechanism swings upward so that the second magnetic belt is located below the strip steel passing line to assist in unwinding. S2, the uncoiler rotates clockwise, and the first magnetic belt absorbs the freely moving steel coil head. The first magnetic belt rotates clockwise, and the uncoiler and the second magnetic belt rotate counterclockwise at the same time, so that the strip is automatically transported backward until it is transported to the next device; S3, the first magnetic belt swings upward and lifts up, weakening the adsorption force on the steel coil head, and the steel coil head and the first magnetic belt are automatically separated, completing the automatic unwinding process of the steel strip; The strip uncoiling method comprises the following steps: S1. The strip steel is wound from inside to outside in a clockwise direction. The first magnetic belt mechanism swings upward to make way for the steel coil, and the second magnetic belt mechanism swings to a corresponding position. The second magnetic belt extends forward, so that the second pressure roller abuts against the rear side of the center height position of the steel coil, and the steel coil car rises to hold the steel coil; S2. The uncoiler rotates counterclockwise, so that the 1 / 4 arc-length steel coil head peels off the steel coil and is adsorbed on the second magnetic belt. Then the second magnetic belt swings downward, so that the 1 / 2 arc-length steel coil head stretches freely between the steel coil car roller and the second magnetic belt, forming a natural streamline. S3. The uncoiler rotates clockwise and the second magnetic belt rotates counterclockwise, so that the strip is automatically transported backward until it is transported to the next device, completing the automatic uncoiling process of the strip.

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