Uncoiling constant tension control device

Abstract

The utility model discloses an uncoiling constant tension control device, which belongs to the technical field of uncoilers and comprises an uncoiler body, a cross rod mounted at the bottom end of the uncoiler body and used for supporting the uncoiler body, a mandrel mounted on the uncoiler body and used for supporting coiled materials, and a variable frequency motor used for controlling the mandrel to rotate. A sliding plate is slidably arranged on the transverse rod in the length direction. The pressing roller is arranged on the outer side of the uncoiling machine body, the pressing roller is attached to the surface of the coiled material and rotates along with conveying of the coiled material, the rotating speed sensor is installed at the end of the pressing roller, and a control system composed of the programmable controller and the variable frequency motor on the uncoiling machine body is matched, so that in the conveying process of the coiled material, the coiled material can be continuously conveyed, and the coiled material can be continuously conveyed. The conveying rate of the coiled material is judged through the rotating speed sensor, then the variable frequency motor is controlled through the programmable controller, it is ensured that the conveying rate of the coiled material is constant, then it is ensured that constant tension is achieved during uncoiling, and practicability is higher.

Description

Technical Field

[0001] The utility model relates to a tension control device, in particular to an unwinding constant tension control device, belonging to the technical field of unwinding machines. Background Art

[0002] Therefore, in recent years, equipment has developed towards high-speed automation and material diversification. The thickness and characteristics of various materials are different, which increases the difficulty of tension control. If the tension is not well controlled, the coil end face will be unevenly collected, wrinkled, uneven tightness inside and outside, or suddenly broken during the production process, resulting in waste, affecting production efficiency and product quality.

[0003] At present, in the process of using the unwinding machine, in order to ensure constant tension, an ultrasonic sensor is used to measure the height change of the material coil at different stages of unwinding to control the speed and reverse torque of the unwinding motor. However, due to the different thickness of the coil, there will be a certain error when releasing the thinner coil. At the same time, when the thickness of the coil itself is uneven, it is easy to produce a certain error, which will affect the control effect of the tension.

[0004] Therefore, a unwinding constant tension control device is designed to optimize the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a constant tension control device for unwinding. A pressure roller is arranged on the outer side of the unwinding machine body. The pressure roller fits the surface of the coil and rotates as the coil is conveyed. A speed sensor is installed at the end of the pressure roller. A control system composed of a programmable controller and a variable frequency motor on the unwinding machine body is used. During the conveying of the coil, the speed sensor is used to determine the conveying rate of the coil, and the variable frequency motor is controlled by the programmable controller to ensure the constant conveying rate of the coil, thereby ensuring a constant tension when unwinding. The utility model is more practical.

[0006] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0007] A constant tension control device for unwinding comprises an unwinding machine body, a cross bar installed at the bottom end of the unwinding machine body to support the unwinding machine body, a core shaft installed on the unwinding machine body to support the coil, and a variable frequency motor for controlling the rotation of the core shaft, a slide plate is slidably arranged on the cross bar along the length direction, an axle rod is rotatably arranged on the top of the slide plate, pressure rods are symmetrically fixedly arranged at both ends of the axle rod, a pressure roller is rotatably arranged between the top ends of the pressure rods, a speed sensor is arranged at one end of the pressure roller, a programmable controller is installed on the outside of the unwinding machine body, an output end of the speed sensor is electrically connected to the programmable controller through a wire, an output end of the programmable controller is electrically connected to the variable frequency motor through a wire, a tensioning mechanism for controlling the adhesion between the pressure roller and the coil is arranged between the pressure rod and the slide plate, and an unfolding mechanism for controlling the pressure rod to open outward is arranged on the top of the slide plate.

[0008] Preferably, a rubber layer is provided on the surface of the pressure roller, and anti-skid grooves are evenly provided on the outer side of the rubber layer along the length direction.

[0009] Preferably, the pressure rod is in an arc shape, and the groove of the pressure rod faces the uncoiler body.

[0010] Preferably, the tensioning mechanism comprises a first positioning rod and a first tension spring, the first positioning rod is fixed between the bottom ends of the two groups of pressure rods, and the first positioning rod and one end of the top of the slide plate close to the uncoiler body are provided with a first tension spring.

[0011] Preferably: the unfolding mechanism includes a slide groove, a slider, an electric telescopic rod, a push block, a connecting rod, a second positioning rod and a ring, the slide groove is opened at the top of the slide along the length direction of the slide, a slider is slidingly provided inside the slide groove, an electric telescopic rod is installed at one end of the bottom of the slide groove close to the uncoiler body, a push block is installed at the output end of the electric telescopic rod, the push block is fitted with the surface of the slider, a connecting rod is hingedly installed on the top of the slider, a second positioning rod is fixed between the two groups of pressure rods, a ring is sleeved on the second positioning rod, and the ring is rotatably connected to the second positioning rod, and the top end of the connecting rod is fixed on the ring.

[0012] Preferably, a second tension spring is installed between a side of the sliding block close to the uncoiler body and an end of the sliding groove.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a constant tension control device for unwinding, in which a pressure roller is arranged on the outer side of an unwinding machine body, the pressure roller is in contact with the surface of the coil and rotates as the coil is conveyed, and a speed sensor is installed at the end of the pressure roller. In conjunction with a programmable controller and a control system composed of a variable frequency motor on the unwinding machine body, the speed sensor is used to determine the conveying rate of the coil during the conveying of the coil, and the variable frequency motor is controlled by the programmable controller to ensure the constant conveying rate of the coil, thereby ensuring a constant tension when unwinding, and having higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is a partial structural diagram of the utility model;

[0017] Figure 3 It is a cross-sectional view of the skateboard of the utility model;

[0018] Figure 4 This is a control system diagram of the utility model.

[0019] In the figure: 1. uncoiler body; 2. mandrel; 3. frequency conversion motor; 4. cross bar; 5. slide plate; 6. shaft; 7. pressure rod; 8. pressure roller; 9. speed sensor; 10. programmable controller; 11. first positioning rod; 12. first tension spring; 13. slide groove; 14. slide block; 15. second tension spring; 16. electric telescopic rod; 17. push block; 18. connecting rod; 19. second positioning rod; 20. collar. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0021] like Figure 1-Figure 4 As shown, the present embodiment provides a constant tension control device for unwinding, comprising an unwinding machine body 1, a cross bar 4 installed at the bottom end of the unwinding machine body 1 to support the unwinding machine body 1, a core shaft 2 installed on the unwinding machine body 1 to support the coil, and a variable frequency motor 3 for controlling the rotation of the core shaft 2, a slide plate 5 is slidably arranged on the cross bar 4 along the length direction, a shaft rod 6 is rotatably installed on the top of the slide plate 5, pressure rods 7 are symmetrically fixedly installed at both ends of the shaft rod 6, a pressure roller 8 is rotatably installed between the top ends of the pressure rod 7, a speed sensor 9 is provided at one end of the pressure roller 8, a programmable controller 10 is installed on the outside of the unwinding machine body 1, an output end of the speed sensor 9 is electrically connected to the programmable controller 10 through a wire, and an output end of the programmable controller 10 is electrically connected to the variable frequency motor 3 through a wire, a tensioning mechanism for controlling the pressure roller 8 to fit the coil is provided between the pressure rod 7 and the slide plate 5, and an unfolding mechanism for controlling the pressure rod 7 to open outward is provided on the top of the slide plate 5.

[0022] The overall working principle is as follows: when installing the coil, the pressure roller 8 on the pressure rod 7 is unfolded outward by the unfolding mechanism, and then the coil is inserted onto the core shaft 2. After the installation of the coil is completed, the unfolding state of the pressure rod 7 is released, and the pressure roller 8 on the pressure rod 7 is attached to the surface of the coil by the tensioning mechanism. During the release of the coil, the pressure roller 8 is also driven to rotate. During the rotation of the pressure roller 8, the speed sensor 9 detects the speed of the pressure roller 8 and transmits it to the inside of the programmable controller 10. Since the circumference of the pressure roller 8 is fixed, the conveying rate of the coil can be detected. The rotation of the variable frequency motor 3 is controlled by the programmable controller 10 to ensure that the conveying rate of the coil is the same as the set rate, thereby ensuring constant tension.

[0023] In this embodiment, a rubber layer is provided on the surface of the pressure roller 8, and anti-skid grooves are evenly formed on the outer side of the rubber layer along the length direction.

[0024] Partial working principle: The setting of the rubber layer on the surface of the pressure roller 8 increases the friction resistance between the pressure roller 8 and the coiled material, ensuring that the rotation of the pressure roller 8 can be stably controlled during the coiled material transportation.

[0025] In this embodiment, the pressing rod 7 is arc-shaped, and the groove of the pressing rod 7 faces the uncoiler body 1 .

[0026] Partial working principle: The arc-shaped pressure rod 7 can effectively avoid contact with the coil during the coil conveying process, and is more practical.

[0027] In this embodiment, the tensioning mechanism includes a first positioning rod 11 and a first tension spring 12. The first positioning rod 11 is fixed between the bottom ends of the two groups of pressure rods 7. The first tension spring 12 is provided at one end of the first positioning rod 11 and the top of the slide plate 5 close to the uncoiler body 1.

[0028] Local working principle: After releasing the open state of the pressure rod 7, the pressure applied to the pressure rod 7 by the first tension spring 12 is used to swing the pressure rod 7 toward the coil, and the pressure roller 8 on the pressure rod 7 is attached to the surface of the coil, and automatically attached as the coil decreases.

[0029] In this embodiment, the unfolding mechanism includes a slide 13, a slider 14, an electric telescopic rod 16, a push block 17, a connecting rod 18, a second positioning rod 19 and a ring 20. The slide 13 is opened at the top of the slide 5 along the length direction of the slide 5. The slide 14 is slidably provided inside the slide 13. The electric telescopic rod 16 is installed at one end of the bottom of the slide 13 close to the uncoiler body 1. The output end of the electric telescopic rod 16 is installed with a push block 17. The push block 17 is in contact with the surface of the slider 14. The top of the slider 14 is hingedly installed with a connecting rod 18. A second positioning rod 19 is fixed between the two groups of pressure rods 7. The second positioning rod 19 is sleeved with a ring 20, and the ring 20 is rotatably connected to the second positioning rod 19. The top of the connecting rod 18 is fixed on the ring 20.

[0030] Local working principle: During the installation of the coiled material, the electric telescopic rod 16 is started to move the slider 14 toward one end away from the coiling machine body 1 for sliding. During the sliding process, the slider 14 pulls the second positioning rod 19 on the pressure rod 7 through the connecting rod 18 to unfold the pressure rod 7 outward. After the installation of the coiled material is completed, the electric telescopic rod 16 is controlled to reset. At this time, the pressure rod 7 automatically flips inward under the action of the first tension spring 12.

[0031] In this embodiment, a second tension spring 15 is installed between a side of the slider 14 close to the uncoiler body 1 and an end of the slide slot 13 .

[0032] Partial working principle: The use of the second tension spring 15 increases the tension applied to the pressure rod 7 when it is reset, thereby ensuring the laminating effect between the pressure roller 8 and the coil.

[0033] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A constant tension control device for unwinding, comprising an unwinding machine body (1), a cross bar (4) installed at the bottom end of the unwinding machine body (1) to support the unwinding machine body (1), a mandrel (2) installed on the unwinding machine body (1) to support the coil, and a variable frequency motor (3) to control the rotation of the mandrel (2), characterized in that: A slide plate (5) is slidably arranged on the cross bar (4) along the length direction, a shaft rod (6) is rotatably installed on the top of the slide plate (5), pressure rods (7) are symmetrically fixedly installed at both ends of the shaft rod (6), a pressure roller (8) is rotatably installed between the top ends of the pressure rod (7), a speed sensor (9) is arranged at one end of the pressure roller (8), a programmable controller (10) is installed on the outer side of the uncoiler body (1), the output end of the speed sensor (9) is electrically connected to the programmable controller (10) through a wire, and the output end of the programmable controller (10) is electrically connected to the frequency conversion motor (3) through a wire, a tensioning mechanism for controlling the pressure roller (8) to fit the coil is arranged between the pressure rod (7) and the slide plate (5), and an unfolding mechanism for controlling the pressure rod (7) to open outward is arranged on the top of the slide plate (5).

2. The unwinding constant tension control device according to claim 1, characterized in that: The surface of the pressure roller (8) is provided with a rubber layer, and the outer side of the rubber layer is evenly provided with anti-skid grooves along the length direction.

3. The unwinding constant tension control device according to claim 2, characterized in that: The shape of the pressure rod (7) is arc-shaped, and the groove of the pressure rod (7) faces the uncoiler body (1).

4. The unwinding constant tension control device according to claim 3, characterized in that: The tensioning mechanism comprises a first positioning rod (11) and a first tension spring (12); the first positioning rod (11) is fixed between the bottom ends of the two groups of pressure rods (7); and the first tension spring (12) is provided between the first positioning rod (11) and the top of the slide plate (5) close to the uncoiler body (1).

5. The unwinding constant tension control device according to claim 4, characterized in that: The unfolding mechanism comprises a slide groove (13), a slider (14), an electric telescopic rod (16), a push block (17), a connecting rod (18), a second positioning rod (19) and a collar (20). The slide groove (13) is arranged at the top of the slide plate (5) along the length direction of the slide plate (5). The slide plate (14) is slidably arranged inside the slide groove (13). The electric telescopic rod (16) is installed at one end of the bottom of the slide groove (13) close to the uncoiler body (1). The output end of the electric telescopic rod (16) is installed with a push block (17). The push block (17) is fitted with the surface of the slider (14). The top of the slider (14) is hingedly installed with a connecting rod (18). A second positioning rod (19) is fixed between the two groups of pressure rods (7). The second positioning rod (19) is sleeved with a collar (20). The collar (20) is rotatably connected to the second positioning rod (19). The top of the connecting rod (18) is fixed on the collar (20).

6. The unwinding constant tension control device according to claim 5, characterized in that: A second tension spring (15) is installed between a side of the slide block (14) close to the uncoiler body (1) and the end of the slide groove (13).

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