A mandrel positioning device and positioning method for an uncoiler

Abstract

This invention discloses a mandrel positioning device for an uncoiler, comprising a base plate, a lifting device, a moving device, and a fixing device. The fixing device is used to fix the roll material and adjust the device according to the roll material's size. The fixing device includes a support, a mandrel assembly, a first drive motor, and a first hydraulic cylinder. The mandrel assembly is rotatably connected to the support, the first hydraulic cylinder is mounted on the support, and the first drive motor is connected to the movable end of the first hydraulic cylinder. The mandrel assembly includes a central shaft and a variable-diameter shaft. The variable-diameter shaft has an adjustment structure for adjusting its diameter. The central shaft is rotatably connected to the support and has a groove. The output shaft of the first drive motor has a protrusion that mates with the groove. This invention incorporates a lifting device, which allows operators to lift roll materials of different diameters to a position coaxial with the mandrel assembly, enhancing the device's adaptability to roll materials of different sizes and characteristics.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of uncoiler, specifically to a mandrel positioning device and method for uncoiler. BACKGROUND

[0002] An uncoiler is a device used to unwind coiled materials (coiled material) into a flat plane, which is commonly used to handle various coiled materials such as paper, metal sheets, plastic films, etc. Through tension control of the coiled material and rotation of the rollers, the uncoiler can unwind the coiled material and feed it into subsequent processing equipment. The mandrel positioning of the uncoiler refers to the operation of ensuring the correct positioning of the coiled material on the mandrel during unwinding.

[0003] The purpose of mandrel positioning is to keep the coiled material stable during unwinding, avoiding material deviation or loosening. In the invention patent with publication number CN116351903A (hereinafter referred to as "Prior Art 1"), a mandrel positioning device for uncoiler is disclosed. Prior Art 1 sets up a control mechanism to control the state of the center roller (mandrel) at the top of the device. When the device is in unwinding mode, the center roller rotates with the winding roller. When the device is in winding mode, the center roller is driven to rotate by the motor, and the winding roller is driven to rotate by the center roller, thus performing winding work. This achieves the purpose of facilitating the adjustment of unwinding and winding modes and strengthening the fixation of the device.

[0004] In actual use, we face the situation that the size and characteristics of coiled materials are different, including different materials, thickness, width, and diameter, etc. However, the adjustability of the mandrel positioning device of the uncoiler is very limited, which cannot effectively adapt to these different coiled material parameters. This limitation not only affects the wide application of the device, but also reduces its flexibility. This problem mainly shows that due to the limitation of the adjustability of the device, the operator cannot accurately adjust the device according to the actual requirements, so that the performance of the device cannot be fully utilized.

[0005] Invention patent content

[0006] The present invention provides a mandrel positioning device and method for uncoiler, which solves the problem of limited adjustability of the mandrel positioning device in the prior art, which makes the device unable to adapt to coiled materials of different sizes and characteristics, limiting the application range and flexibility of the device.

[0007] The technical solution of the present invention is as follows:

[0008] A mandrel positioning device for a decoiler comprises a base plate, a lifting device, a moving device and a fixing device, the lifting device is arranged on one side of the fixing device, the fixing device is arranged on the base plate, and the moving device is arranged between the lifting device and the fixing device and used for transporting a coil from the lifting device to the fixing device.

[0009] The fixing device is used for fixing the coil and adjusting the device according to the size of the coil, and comprises a support, a mandrel assembly, a first driving motor and a first hydraulic cylinder, the mandrel assembly is rotationally connected with the support, the first hydraulic cylinder is arranged on the support, and the first driving motor is connected with a movable end of the first hydraulic cylinder; the mandrel assembly comprises a central shaft and a variable-diameter shaft, and an adjusting structure is arranged on the variable-diameter shaft and used for adjusting the diameter of the variable-diameter shaft.

[0010] The central shaft is rotationally connected with the support, a groove is arranged on the central shaft, and a protrusion matched with the groove is arranged on an output shaft of the first driving motor; the lifting device comprises a stand, a first screw rod, a lifting block and a load-bearing rod, one end of the first screw rod is rotationally connected with the base plate, the other end of the first screw rod is rotationally connected with the stand, an axial hole is arranged on the lifting block, an internal thread is arranged in the axial hole, the lifting block is threadedly connected with the first screw rod, the lifting block is connected with the stand, and the load-bearing rod is connected with the lifting block; a scale line is arranged on the stand, and a zero scale position on the scale line is in the same horizontal plane as an axis of the variable-diameter shaft.

[0011] In a preferred technical solution, the moving device comprises an X-shaped frame, a second screw rod, a second driving motor and a fixing block, the X-shaped frame comprises an I-shaped rod and a Π-shaped rod, the I-shaped rod and the Π-shaped rod are rotationally connected, the X-shaped frame is arranged on the fixing block, the fixing block is hingedly connected with a first telescopic cylinder and a second telescopic cylinder, an end of the first telescopic cylinder is hingedly connected with the I-shaped rod, an end of the second telescopic cylinder is hingedly connected with the Π-shaped rod, the fixing block is threadedly connected with the second screw rod, one end of the second screw rod is rotationally connected with the base plate, and the other end of the second screw rod is connected with an output shaft of the second driving motor.

[0012] In a preferred technical solution, a protective material is arranged on the X-shaped frame.

[0013] In a preferred technical solution, a splicing hole is arranged on the X-shaped frame, and adjacent X-shaped frames are connected through bolts.

[0014] In a preferred technical solution, the moving device further comprises a protective plate, a matching hole is arranged on the protective plate, and the protective plate is connected with the X-shaped frame through bolts.

[0015] In a preferred technical solution, an outer contour of the protrusion is in the shape of a gear.

[0016] In a preferred technical solution, an arc-shaped plate is arranged on the adjusting structure, and the arc-shaped plate is made of rubber material.

[0017] In a preferred technical solution, the load-bearing rod is connected with the lifting block through a bolt assembly.

[0018] In a preferred technical solution, the load-bearing rod is provided with a reinforcing rib.

[0019] A positioning method for a mandrel positioning device of an uncoiler comprises the following steps:

[0020] The coiled material is manually moved to the lifting device, and then the diameter of the inner circle of the coiled material is obtained through the scale line on the stand;

[0021] The first screw rod is rotated to move the lifting block to the center position of the inner circle of the coiled material, and then the load-bearing rod is connected with the lifting block;

[0022] The distance between the center of the inner circle of the coiled material and the zero scale line on the stand is measured, and then the load-bearing rod is moved to move the coiled material by the same distance, so that the center of the inner circle of the coiled material is at the same level as the zero scale line;

[0023] The coiled material is fixed on the moving device, the load-bearing rod is separated from the coiled material, and then the coiled material is transported to the fixing device through the moving device;

[0024] The first hydraulic cylinder is started to make the protrusion on the output shaft of the first drive motor match the groove on the center shaft, and the center shaft is fixed;

[0025] Then the third drive motor is started to rotate the lead screw, the rotation of the lead screw adjusts the distance between the center shaft and the variable-diameter shaft, so that the diameter of the variable-diameter shaft changes until the variable-diameter shaft contacts the inner circle of the coiled material, the coiled material is fixed, and the mandrel positioning of the uncoiler is completed.

[0026] The beneficial effects of the present application are as follows:

[0027] The lifting device is provided in the present application, through which the workers can lift the coiled material of different diameters to the coaxial position with the mandrel assembly, thereby enhancing the adaptability of the equipment to the coiled material of different sizes.

[0028] The moving device is arranged between the lifting device and the fixing device, which facilitates the transportation of the coiled material between different devices, reduces the labor intensity of the workers, and speeds up the work efficiency.

[0029] The variable-diameter shaft is arranged in the fixing device, which is adjusted according to the size of the inner circle of the coiled material, thereby facilitating the fixation of coiled materials of different specifications and improving the application range of the equipment.

[0030] The first driving motor is arranged on the first hydraulic cylinder, the matching state of the protrusion and the groove can be adjusted through the first hydraulic cylinder, when the protrusion matches with the groove, the rotation of the mandrel assembly is controlled by the first driving motor, the equipment can carry out the winding operation, when the protrusion does not match with the groove, the mandrel assembly can rotate freely, and the equipment can carry out the unwinding operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] BRIEF DESCRIPTION OF DRAWINGS Figure 1 The structure schematic diagram of the present application is shown in the figure;

[0032] BRIEF DESCRIPTION OF DRAWINGS Figure 2 The structure schematic diagram of the present application is shown in the figure; Figure 1 The enlarged schematic diagram of A in the figure is shown in the figure;

[0033] BRIEF DESCRIPTION OF DRAWINGS Figure 3 The structure schematic diagram of the present application is shown in the figure; Figure 1 The enlarged schematic diagram of B in the figure is shown in the figure;

[0034] BRIEF DESCRIPTION OF DRAWINGS Figure 4 The structure schematic diagram of the present application is shown in the figure;

[0035] BRIEF DESCRIPTION OF DRAWINGS Figure 5 The structure schematic diagram of the present application is shown in the figure; Figure 4 The enlarged schematic diagram of C in the figure is shown in the figure;

[0036] BRIEF DESCRIPTION OF DRAWINGS Figure 6 The structure schematic diagram of the present application is shown in the figure;

[0037] BRIEF DESCRIPTION OF DRAWINGS Figure 7 The structure schematic diagram of the present application is shown in the figure;

[0038] BRIEF DESCRIPTION OF DRAWINGS Figure 8 The structure schematic diagram of the present application is shown in the figure; Figure 7 The enlarged schematic diagram of D in the figure is shown in the figure;

[0039] BRIEF DESCRIPTION OF DRAWINGS Figure 9 The structure schematic diagram of the X-shaped frame in the present application is shown in the figure;

[0040] BRIEF DESCRIPTION OF DRAWINGS Figure 10 The structure schematic diagram of the present application is shown in the figure;

[0041] BRIEF DESCRIPTION OF DRAWINGS Figure 11 The structure schematic diagram of the present application is shown in the figure.

[0042] In the diagram: 100-base plate, 200-support, 210-first drive motor, 211-protrusion, 220-first hydraulic cylinder, 300-spindle assembly, 310-central shaft, 311-threaded hole, 312-directional hole, 313-groove, 320-variable diameter shaft, 321-moving plate, 322-first connector, 323-second connector, 324-third drive motor, 325-lead screw, 326-positioning rod, 400-column, 410-first screw, 420 - Lifting block, 430- Load-bearing rod, 431- Reinforcing rib, 500- X-shaped frame, 501- I-shaped rod, 502- Π-shaped rod, 503- Assembly hole, 510- Second screw, 520- Second drive motor, 530- Fixing block, 540- Protective plate, 541- Mating hole, 600- Arc plate, 700- Ruler rod, 710- Sliding groove, 720- Moving block, 721- Threaded rod, 722- Nut, 723- Spherical body, 800- Rod body, 900- Cover plate. Detailed Implementation

[0043] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this invention are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, the descriptions involving "first," "second," etc., in this patent are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly including at least one of the features.

[0046] In this invention patent, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention patent according to the specific circumstances.

[0047] Example 1

[0048] like Figure 1 , Figure 2 , Figure 3As shown, a mandrel positioning device for an uncoiler includes a base plate 100, a lifting device, a moving device, and a fixing device. The lifting device is disposed on one side of the fixing device, the fixing device is disposed on the base plate 100, and the moving device is disposed between the lifting device and the fixing device. The moving device is used to transport the roll material from the lifting device to the fixing device.

[0049] The fixing device is used to fix the roll material and adjust the equipment according to the size of the roll material. The fixing device includes a support 200, a mandrel assembly 300, a first drive motor 210 and a first hydraulic cylinder 220. The mandrel assembly 300 is rotatably connected to the support 200. The first hydraulic cylinder 220 is mounted on the support 200. The first drive motor 210 is connected to the movable end of the first hydraulic cylinder 220. The mandrel assembly 300 includes a central shaft 310 and a variable diameter shaft 320. An adjustment structure is provided on the variable diameter shaft 320. The adjustment structure is used to adjust the diameter of the variable diameter shaft 320.

[0050] The central shaft 310 is rotatably connected to the support 200. A groove 313 is provided on the central shaft 310, and a protrusion 211 that mates with the groove 313 is provided on the output shaft of the first drive motor 210. The lifting device includes a column 400, a first screw 410, a lifting block 420, and a load-bearing rod 430. One end of the first screw 410 is rotatably connected to the base plate 100, and the other end is rotatably connected to the column 400. The lifting block 420 has a shaft hole with an internal thread, and the lifting block 420 is threadedly engaged with the first screw 410 and the column 400. The load-bearing rod 430 is connected to the lifting block 420. The column 400 has a scale line, and the zero mark on the scale line is on the same horizontal plane as the axis of the variable diameter shaft 320. The unit of the scale line is millimeters.

[0051] like Figure 4 , Figure 5 , Figure 7 , Figure 8 As shown, the adjustment structure includes a movable plate 321, a first connecting member 322, and a second connecting member 323. One end of the first connecting member 322 is rotatably connected to the central shaft 310, and the other end of the first connecting member 322 is rotatably connected to the movable plate 321. One end of the second connecting member 323 is rotatably connected to the variable diameter shaft 320, and the other end of the second connecting member 323 is rotatably connected to the movable plate 321. A third drive motor 324 is provided on the variable diameter shaft 320, and a lead screw 325 is provided on the output shaft of the third drive motor 324. A threaded hole 311 is provided on the central shaft 310, and the lead screw 325 is threadedly engaged with the threaded hole 311. A directional hole 312 is provided on the central shaft 310, and a positioning rod 326 is provided on the variable diameter shaft 320, and the positioning rod 326 is engaged with the directional hole 312.

[0052] The first screw 410 is rotatably connected to both the base plate 100 and the column 400 via bearings. The first screw 410 is connected to the inner ring of the bearing, the base plate 100 is connected to the outer ring of the bearing, and the column 400 is connected to the outer ring of the bearing. The spindle assembly 300 is connected to the support 200 via bearings. The spindle assembly 300 is connected to the inner ring of the bearing, and the support 200 is connected to the outer ring of the bearing.

[0053] The working principle of this invention is as follows: The roll material is manually placed in front of the lifting device. The diameter or radius of the inner circle of the roll material is determined by the scale lines on the column 400. Then, the position of the lifting block 420 is adjusted to the area of ​​the inner circle of the roll material, and the load-bearing rod 430 is connected to the lifting block 420. Then, the first screw 410 is rotated to move the load-bearing rod 430 and the lifting block 420 toward the zero scale line, and finally the center of the inner circle of the roll material is moved to the same horizontal plane as the zero scale line (the horizontal plane can be understood as being at the same level as the zero scale line). Figure 1 (A plane perpendicular to the Z-axis or a plane parallel to the XY plane). Then, the operator fixes the roll material by adjusting the moving device, first disengaging the load-bearing rod 430 from the roll material, and then transporting the roll material to the fixing device using the moving device. After the roll material is transported to the fixing device, the operator adjusts the extension of the output end of the first hydraulic cylinder 220 to engage the protrusion 211 with the groove 313, and then starts the third drive motor 324 to adjust the diameter of the adjusting structure of the variable diameter shaft 320 until the variable diameter shaft 320 provides fixed support for the roll material. Figure 7 As shown, the diameter of the variable diameter shaft 320 is at its maximum value in the illustrated state, and the distance between the variable diameter shaft 320 and the central shaft 310 is the shortest at this time. When it is necessary to reduce the diameter of the variable diameter shaft 320, the third drive motor 324 is started to drive the lead screw 325 to rotate, so that the variable diameter shaft 320 moves in a direction away from the central shaft 310, thereby reducing the diameter of the variable diameter shaft 320.

[0054] When the groove 313 engages with the protrusion 211, the rotation of the mandrel assembly 300 is controlled by the first drive motor 210, and the equipment can perform a winding operation at this time. When the groove 313 and the protrusion 211 do not engage, the mandrel assembly 300 can rotate freely, and the equipment can perform an unwinding operation at this time.

[0055] Example 2

[0056] like Figure 6 , Figure 9As shown, in this embodiment, the moving device includes an X-shaped frame 500, a second screw 510, a second drive motor 520, and a fixing block 530. The X-shaped frame 500 includes an I-shaped rod 501 and a Π-shaped rod 502, which are rotatably connected. The X-shaped frame 500 is mounted on the fixing block 530. A first telescopic cylinder and a second telescopic cylinder are hinged on the fixing block 530. The end of the first telescopic cylinder is hinged to the I-shaped rod 501, and the end of the second telescopic cylinder is hinged to the Π-shaped rod 502. The fixing block 530 has a circular hole with an internal thread. The fixing block 530 is threadedly engaged with the second screw 510. One end of the second screw 510 is rotatably connected to the base plate 100, and the other end of the second screw 510 is connected to the output shaft of the second drive motor 520.

[0057] Once the roll material is lifted into position by the lifting device, meaning the center of the inner circle of the roll material is on the same horizontal plane as the zero mark on the column 400, the operator controls the first and second telescopic cylinders to change the angle between the I-shaped rod 501 and the Π-shaped rod 502 until they contact the roll material, thus supporting it. The X-shaped frame 500 can support roll materials of different sizes. After the X-shaped frame 500 has completed supporting the roll material, the operator lowers the load-bearing rod 430 so that it no longer supports the roll material. Then, the second drive motor 520 is started to drive the second screw 510 to rotate, causing the fixing block 530, the X-shaped frame 500, and the roll material to move towards the fixing device.

[0058] like Figure 1 As shown, a hollow chamber is provided on the base plate 100, and the moving device is installed in the hollow chamber. A cover plate 900 is provided on the hollow chamber. When the moving device needs to move, the staff can remove the cover plate 900 to ensure that there are no obstructions on the movement path of the moving device.

[0059] Example 3

[0060] In this embodiment, a protective material, such as rubber, is provided on the X-shaped frame 500. Because the X-shaped frame 500 supports the coil material, and the coil material is relatively heavy (steel coils typically weigh over 15 tons), using rubber as a protective material on the X-shaped frame 500 can reduce wear between the coil material and the X-shaped frame. Furthermore, the contact between the rubber and the coil material increases the friction between the coil material and the X-shaped frame 500, reducing the possibility of coil displacement.

[0061] Example 4

[0062] like Figure 9 , Figure 10As shown, in this embodiment, the X-shaped frame 500 is provided with assembly holes 503, and adjacent X-shaped frames 500 are connected by bolts. Because metal coils vary in specifications and width, a single X-shaped frame 500 may not be sufficient to support the metal coil. Workers can connect several X-shaped frames 500 on-site using bolts according to the actual width of the metal coil to ensure the reliability of the X-shaped frame's support for the metal coil.

[0063] Example 5

[0064] like Figure 10 As shown in this embodiment, during the transportation of the roll material, the position of the roll material may shift due to inertia. Therefore, the moving device also includes a protective plate 540, which has mating holes 541. The protective plate 540 is connected to the X-shaped frame 500 by bolts. When the roll material is on the moving device, the operator can connect the protective plate 540 to the X-shaped frame 500 with bolts. The protective plates 540 on both sides of the X-shaped frame 500 clamp and position the roll material, providing limiting protection during the transportation process and preventing the roll material from falling during transportation.

[0065] Example 6

[0066] In this embodiment, the outer contour of the protrusion 211 forms a gear shape, which can be a spur gear. Correspondingly, the outer contour of the groove 313 that mates with the protrusion 211 also forms a gear shape. When the protrusion 211 and the groove 313 mate, it is equivalent to two gears meshing, which facilitates the transmission of the torsional force from the output shaft of the first drive motor 210 to the central shaft 310. The shapes and dimensions of the components shown in the accompanying drawings are for reference only; the drawings primarily illustrate the position and connection relationships of the components.

[0067] Example 7

[0068] like Figure 4 , Figure 5 As shown, in this embodiment, an arc-shaped plate 600 is provided on the adjustment structure, and the arc-shaped plate 600 is made of rubber material. Specifically, the arc-shaped plate 600 is disposed on the movable plate 321. When the variable diameter shaft 320 completes the fixing of the roll material, the movable plate 321 in the adjustment structure is in direct contact with the inner ring of the roll material on the variable diameter shaft 320. Disposing of the arc-shaped plate 600 made of rubber material on the movable plate 321 can prevent the inner ring of the roll material from causing wear to the movable plate 321, thereby extending the service life of the movable plate 321.

[0069] Example 8

[0070] like Figure 11As shown, in this embodiment, the load-bearing rod 430 and the lifting block 420 are connected by a bolt assembly, which includes bolts and nuts. Different specifications of metal coils have different widths; for example, the width of aluminum coils is typically between 100-2200mm. To accommodate the movement of metal coils of different specifications, several load-bearing rods 430 of different models are provided. The connection between the load-bearing rod 430 and the lifting block 420 via the bolt assembly speeds up the replacement of the load-bearing rod 430, saving working time and improving work efficiency.

[0071] Example 9

[0072] like Figure 3 , Figure 11 As shown, in this embodiment, the weight of the metal coil is mostly over 1 ton. To ensure that the load-bearing rod 430 can bear the weight of the metal coil, a reinforcing rib 431 is provided on the load-bearing rod 430. The reinforcing rib 431 plays a reinforcing role, which can enhance the load-bearing capacity of the load-bearing rod 430 and extend the service life of the load-bearing rod 430.

[0073] Example 10

[0074] like Figure 1 , Figure 2 As shown, in this embodiment, a scale rod 700 is provided on one side of the column 400. The scale rod 700 has graduation lines, with the unit of the graduation lines being millimeters. An initial graduation line is provided in the graduation lines, and the initial graduation line and the zero graduation line are on the same horizontal plane. A sliding groove 710 is provided on the scale rod 700, and a moving block 720 is provided in the sliding groove 710. The moving block 720 includes a threaded rod 721, a nut 722, and a spherical body 723. The spherical body 723 is rotatably connected to the threaded rod 721, and the nut 722 is threadedly connected to the threaded rod 721. A through hole is provided on the spherical body 723, and a rod body 800 is provided in the through hole. The rod body 800 is slidably engaged with the through hole. A universal joint is provided at the end of the rod body 800, and the rod body 800 is connected to the lifting block 420 through the universal joint. A level is provided on the rod body 800.

[0075] After the staff determines the radius of the inner circle of the roll material, the moving block 720 is fixed above the initial scale line of the ruler rod 700, at a position equal to the radius of the inner circle of the roll material (when fixing the moving block 720, any errors caused by dimensional differences or other factors in the lifting block 420, load-bearing rod 430, rod body 800, and moving block 720 are taken into account). Then, the position of the lifting block 420 is adjusted. By observing whether the level on the rod body 800 is horizontal, the staff can determine whether the center of the roll material is on the same horizontal plane as the zero scale line and the initial scale line, thus determining whether the roll material has been raised to the correct position.

[0076] Example 11

[0077] A positioning method for a mandrel positioning device for an uncoiler includes the following:

[0078] Manually move the roll material to the lifting device, and then determine the diameter of the inner circle of the roll material by means of the scale line on the column 400;

[0079] Rotate the first screw 410 to move the lifting block 420 to the center position of the inner circle of the roll material, and then connect the load-bearing rod 430 to the lifting block 420;

[0080] Measure the distance between the center of the inner circle of the roll material and the zero mark on the column 400, and then move the load-bearing rod 430 so that the load-bearing rod 430 moves the roll material the same distance so that the center of the inner circle of the roll material and the zero mark are on the same horizontal plane.

[0081] The roll material is fixed to the moving device, so that the load-bearing rod 430 is out of contact with the roll material, and then the roll material is transported to the fixed device by the moving device.

[0082] The first hydraulic cylinder 220 is activated so that the protrusion 211 on the output shaft of the first drive motor 210 engages with the groove 313 on the central shaft 310, thereby fixing the central shaft 310.

[0083] Then, the third drive motor 324 is started to rotate the lead screw 325. The rotation of the lead screw 325 adjusts the distance between the central shaft 310 and the variable diameter shaft 320, so that the diameter of the variable diameter shaft 320 changes until the variable diameter shaft 320 contacts the inner ring of the roll material, thereby fixing the roll material and completing the mandrel positioning of the uncoiler.

[0084] To facilitate rotation control of the first screw 410, a motor can be installed on the column 400, and the output shaft of the motor is connected to the end of the first screw 410.

[0085] The specific embodiments described above provide a further detailed explanation of the technical solution, the technical problem solved, and the beneficial effects of this invention. It should be noted that the above descriptions are merely specific embodiments of this invention and are not intended to limit this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A mandrel positioning apparatus for a decoiler, characterized by: The device comprises a base plate (100), a lifting device, a moving device and a fixing device, the lifting device is arranged on one side of the fixing device, the fixing device is arranged on the base plate (100), and the moving device is arranged between the lifting device and the fixing device and is used for transporting the roll material from the lifting device to the fixing device; The fixing device is used for fixing the roll material and adjusting the device according to the size of the roll material, and comprises a support (200), a mandrel assembly (300), a first driving motor (210) and a first hydraulic cylinder (220), the mandrel assembly (300) is rotationally connected with the support (200), the first hydraulic cylinder (220) is arranged on the support (200), and the first driving motor (210) is connected with a movable end of the first hydraulic cylinder (220); the mandrel assembly (300) comprises a central shaft (310) and a variable-diameter shaft (320), and an adjusting structure is arranged on the variable-diameter shaft (320) and used for adjusting the diameter of the variable-diameter shaft (320); The central shaft (310) is rotationally connected with the support (200), a recess (313) is arranged on the central shaft (310), and a protrusion (211) matched with the recess (313) is arranged on an output shaft of the first driving motor (210); the lifting device comprises a stand (400), a first screw rod (410), a lifting block (420) and a load-bearing rod (430), one end of the first screw rod (410) is rotationally connected with the base plate (100), the other end of the first screw rod (410) is rotationally connected with the stand (400), an axial hole is arranged on the lifting block (420), an internal thread is arranged in the axial hole, the lifting block (420) is threadedly connected with the first screw rod (410), the lifting block (420) is connected with the stand (400), and the load-bearing rod (430) is connected with the lifting block (420); a scale line is arranged on the stand (400), and a zero scale position on the scale line is located on the same horizontal plane as an axis of the variable-diameter shaft (320).

2. A mandrel positioning apparatus for an uncoiler as defined in claim 1, wherein: The moving device comprises an X-shaped frame (500), a second screw rod (510), a second driving motor (520) and a fixing block (530), the X-shaped frame (500) comprises an I-shaped rod (501) and a Π-shaped rod (502), the I-shaped rod (501) and the Π-shaped rod (502) are rotationally connected, the X-shaped frame (500) is arranged on the fixing block (530), the fixing block (530) is hingedly connected with a first telescopic cylinder and a second telescopic cylinder, an end portion of the first telescopic cylinder is hingedly connected with the I-shaped rod (501), an end portion of the second telescopic cylinder is hingedly connected with the Π-shaped rod (502), the fixing block (530) is threadedly connected with the second screw rod (510), one end of the second screw rod (510) is rotationally connected with the base plate (100), and the other end of the second screw rod (510) is connected with an output shaft of the second driving motor (520).

3. A mandrel positioning apparatus for an uncoiler as defined in claim 2, wherein: The X-shaped frame (500) is provided with a protective material.

4. A mandrel positioning apparatus for an uncoiler as defined in claim 2, wherein: The X-shaped frame (500) is provided with an assembling hole (503), and adjacent X-shaped frames (500) are connected through bolts.

5. A mandrel positioning apparatus for an uncoiler as defined in claim 2, wherein: The moving device further comprises a protective plate (540), the protective plate (540) is provided with a matching hole (541), and the protective plate (540) is connected with the X-shaped frame (500) through bolts.

6. A mandrel positioning apparatus for an uncoiler as defined in claim 1, wherein: The outer contour of the convex block (211) is in the shape of a gear.

7. A mandrel positioning apparatus for an uncoiler as defined in claim 1, wherein: The adjusting structure is provided with an arc-shaped plate (600) made of rubber material.

8. A mandrel positioning apparatus for an uncoiler as defined in claim 1, wherein: The load-bearing rod (430) is connected with the lifting block (420) through a bolt assembly.

9. A mandrel positioning apparatus for an uncoiler as defined in claim 1, wherein: The load-bearing rod (430) is provided with a reinforcing rib (431).

10. A method of positioning a mandrel positioning apparatus for an unwinder according to any one of claims 1 to 9, characterised in that: The application comprises the following contents: The coiled material is manually moved to the lifting device, and then the diameter length of the inner circle of the coiled material is obtained through the scale line on the stand (400); The first screw rod (410) is rotated to move the lifting block (420) to the center position of the inner circle of the coiled material, and then the load-bearing rod (430) is connected with the lifting block (420); The distance between the center of the inner circle of the coiled material and the zero scale line on the stand (400) is measured, and then the load-bearing rod (430) is moved to make the load-bearing rod (430) drive the coiled material to move the same distance, so that the center of the inner circle of the coiled material is at the same horizontal plane with the zero scale line; The coiled material is fixed on the moving device, the load-bearing rod (430) is separated from the coiled material, and then the coiled material is transported to the fixing device through the moving device; The first hydraulic cylinder (220) is started to make the convex block (211) on the output shaft of the first driving motor (210) cooperate with the groove (313) on the center shaft (310), so that the center shaft (310) is fixed; Then the third driving motor (324) is started to rotate the lead screw (325), the rotation of the lead screw (325) adjusts the distance between the center shaft (310) and the variable-diameter shaft (320), changes the diameter of the variable-diameter shaft (320), until the variable-diameter shaft (320) contacts with the inner circle of the coiled material, realizes the fixation of the coiled material, and completes the positioning of the mandrel of the decoiler.

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