Asynchronous feeding mechanism of circular knife machine

Abstract

The utility model discloses a kind of round knife machine asynchronous feeding mechanism. Including: drive system;Multiple groups of feeding roller group, feeding roller group includes driving roller and driven roller, adjacent driving wheel is drivenly connected through synchronous wheel assembly, driven roller is arranged in the upper of driving roller through bearing in parallel, and the driving motor of drive system is connected with one group of driving roller;Driving roller includes: inner rotor assembly, the main shaft of inner rotor assembly is installed rotation in rack. Round knife machine asynchronous feeding mechanism of the utility model, avoid material and equipment damage by providing overload protection through flexible transmission, ensure that feeding and cutting are accurately synchronized by means of real-time monitoring and control, can automatically adjust conveying parameter according to material characteristics to improve stability, while reducing mechanical wear and tear to reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of circular knife machine, and in particular to an asynchronous feeding mechanism for a circular knife machine. Background Technology

[0002] As a core piece of equipment for precision roll material processing, the stability and precision of the feeding device of the rotary cutter directly affect the quality of processes such as slitting and embossing.

[0003] Traditional circular knife machine feeding mechanisms mostly use mechanical rigid transmission (such as gears and belts) to connect multiple sets of feeding rollers and achieve synchronous conveying through a fixed speed ratio. However, this method has significant drawbacks: on the one hand, rigid transmission cannot dynamically adjust the torque and speed between roller sets according to material characteristics (such as thickness, hardness, and ductility), which can easily lead to problems such as tensile deformation, tearing, or accumulation of materials due to uneven tension. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose an asynchronous feeding mechanism for a circular knife machine, which provides overload protection through flexible transmission to avoid damage to materials and equipment, ensures precise synchronization of feeding and cutting through real-time monitoring and control, can automatically adjust conveying parameters according to material characteristics to improve stability, and at the same time reduce mechanical wear and lower maintenance costs.

[0006] To achieve the above objectives, this utility model proposes an asynchronous feeding mechanism for a circular knife machine, comprising:

[0007] Drive system;

[0008] Multiple sets of feeding rollers, each set including a driving roller and a driven roller, with adjacent driving rollers connected by a synchronous pulley assembly, and the driven rollers arranged parallel above the driving rollers by bearings, the drive motor of the drive system being connected to one of the sets of driving rollers;

[0009] The active roller includes:

[0010] An inner rotor assembly, wherein the main shaft of the inner rotor assembly is mounted and rotates on a frame, and a variable magnet is provided on the outer periphery of the main shaft of the inner rotor assembly;

[0011] An outer rotor assembly rotates on a frame. The outer rotor cylinder of the outer rotor assembly is coaxially sleeved outside the inner rotor assembly. Permanent magnets are evenly distributed circumferentially on the inner wall of the outer rotor cylinder, and the permanent magnets and the variable magnets form a closed magnetic circuit.

[0012] The asynchronous feeding mechanism of this circular knife machine provides overload protection through flexible transmission to avoid damage to materials and equipment. It ensures precise synchronization of feeding and cutting through real-time monitoring and control. It can automatically adjust the conveying parameters according to the material characteristics to improve stability, while reducing mechanical wear and lowering maintenance costs.

[0013] In addition, the asynchronous feeding mechanism for the circular cutter machine proposed in this application may also have the following additional technical features:

[0014] Specifically, the outer circumference of the main shaft of the inner rotor assembly is wound with an excitation coil and fitted with silicon steel sheets.

[0015] Specifically, the gap between the inner rotor assembly and the outer rotor assembly is filled with magnetorheological fluid, and the excitation coil is connected to the current controller of the drive system via wires.

[0016] Specifically, it also includes a width adjustment assembly, which includes a bidirectional ball screw, a slide rail, two sets of first intermediate plates, and two sets of second intermediate plates. The screw end of the bidirectional ball screw is rotatably connected to the inner side of the frame. The slide rail is located on the inner side of the frame, and two sets of sliders are slidably arranged on the slide rail. The bidirectional moving ends of the bidirectional ball screw are respectively connected to the two sets of sliders. The two sets of first intermediate plates are respectively fixed on the sliders. The second intermediate plate is slidably connected to the top of the second intermediate plate. A spring is provided between the first intermediate plate and the second intermediate plate. Both the second intermediate plate and the first intermediate plate have coaxial threaded grooves, and a screw rod is threaded into each of the two threaded grooves.

[0017] Specifically, it also includes a photoelectric sensor, which is mounted on both sides of the feeding path via a bracket, with the detection end of the photoelectric sensor aligned with the edge or positioning hole of the roll material.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of the asynchronous feeding mechanism of the circular knife machine of this utility model;

[0021] Figure 2 This is a schematic diagram of the planar structure of the drive roller in the asynchronous feeding mechanism of the circular knife machine of this utility model;

[0022] Figure 3 This is a schematic diagram of the width adjustment component in the asynchronous feeding mechanism of the circular knife machine of this utility model.

[0023] As shown in the figure: 1. Driven roller; 2. Driven roller; 3. Synchronous pulley assembly; 4. Drive motor; 5. Width adjustment assembly; 6. Outer rotor assembly; 7. Inner rotor assembly; 8. Permanent magnet; 501. Bidirectional ball screw; 502. Slide rail; 503. First middle plate; 504. Second middle plate; 505. Tightening rod. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0025] The asynchronous feeding mechanism of the circular knife machine according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figures 1-3 As shown, the asynchronous feeding mechanism of the circular knife machine according to an embodiment of this utility model includes:

[0027] Drive system.

[0028] Multiple sets of feeding rollers are provided, each set including a driving roller 2 and a driven roller 1. Adjacent driving rollers 2 are connected by a synchronous pulley assembly 3. The driven roller 1 is arranged parallel above the driving roller 2 by bearings. The drive motor 4 of the drive system is connected to one of the driving rollers 2.

[0029] The drive roller 2 includes:

[0030] The inner rotor assembly 7 has its main shaft mounted and rotated on the frame, and a variable magnet 9 is provided on the outer periphery of the main shaft of the inner rotor assembly 7.

[0031] The outer rotor assembly 6 rotates on the frame. The outer rotor cylinder of the outer rotor assembly 6 is coaxially sleeved outside the inner rotor assembly 7. Permanent magnets 8 are evenly distributed around the inner wall of the outer cylinder of the outer rotor assembly 6. The permanent magnets 8 and the variable magnets 9 form a closed magnetic circuit.

[0032] Specifically, power transmission: the servo motor drives the first set of active rollers 2 to rotate, and the synchronous wheel assembly 3 transmits power to other active rollers, forming the synchronous operation of multiple sets of feeding rollers.

[0033] Asynchronous drive mechanism: The variable magnet 9 of the inner rotor assembly 7 and the permanent magnet 8 of the outer rotor assembly 6 are coupled by magnetic field. The speed difference between the inner and outer rotors is determined by the magnetic circuit design, so as to realize the dynamic adjustment of the feeding speed.

[0034] The driven roller 1 and the driving roller 2 form a clamping structure for material conveying. The friction force drives the roll material to be fed at a uniform speed, which can meet the processing needs of materials of different thicknesses.

[0035] The drive system directly drives only one set of active rollers, while the remaining active rollers are mechanically connected via synchronous pulley assembly 3. However, the variable magnet inside the rotor of each set of active rollers can be adjusted independently, allowing the actual output speed or torque of each set of feeding rollers to be finely adjusted based on the difference in magnetic coupling strength, even under mechanical synchronous connection, thus achieving "asynchronous feeding"—that is, flexibly adjusting the conveying parameters of different roller sets according to material characteristics such as thickness, hardness, and ductility, to avoid deformation or tearing of materials due to uneven force.

[0036] Furthermore, a force sensor is provided on the main shaft connection of the outer rotor assembly 6 to detect the resistance experienced by the outer rotor assembly 6.

[0037] As a further feature of this utility model, the outer circumference of the main shaft of the inner rotor assembly 7 is wound with an excitation coil and fitted with silicon steel sheets.

[0038] The magnetic field generated by the excitation coil interacts with the constant magnetic field of the permanent magnet 8 on the inner wall of the outer rotor, forming a magnetic pull or repulsion force depending on the magnetic pole configuration. The magnetic coupling strength between the two can be adjusted by changing the excitation current.

[0039] Increased current → stronger magnetic field → increased magnetic coupling torque → increased output torque of the external rotor.

[0040] Decreasing current → weakening magnetic field → allowing slippage between inner and outer rotors → achieving overload protection or speed fine-tuning.

[0041] Silicon steel sheets, also known as iron-silicon alloys, are soft magnetic materials with extremely high permeability, far exceeding that of air or ordinary steel. They can effectively guide the magnetic lines of force generated by the excitation coil to concentrate through the air gap between the inner and outer rotors, forming a closed magnetic circuit path: outer rotor permanent magnet → air gap → silicon steel sheet → inner rotor main shaft → air gap → outer rotor permanent magnet. This reduces magnetic field leakage, improves magnetic energy utilization, and makes the magnetic coupling torque stronger and more stable under the same excitation current.

[0042] As a further feature of this utility model, the gap between the inner rotor assembly 7 and the outer rotor assembly 6 is filled with magnetorheological fluid, and the excitation coil is connected to the current controller of the drive system through a wire.

[0043] When the excitation coil is energized, it generates a magnetic field, causing the magnetorheological fluid to change from a liquid to a semi-solid state within milliseconds. The viscosity increases with the increase of the magnetic field strength, thereby enhancing the coupling torque between the inner and outer rotors. When the power is off, it returns to a liquid state, allowing slippage and achieving overload protection and flexible transmission.

[0044] As a further feature of this utility model, it also includes a width adjustment component 5, which includes a bidirectional ball screw 501, a slide rail 502, two sets of first middle plates 503 and two sets of second middle plates 504. The screw end of the bidirectional ball screw 501 is rotatably connected to the inner side of the frame. The slide rail 502 is disposed on the inner side of the frame. Two sets of sliders are slidably disposed on the slide rail 502. The bidirectional moving ends of the bidirectional ball screw 501 are respectively connected to the two sets of sliders. The two sets of first middle plates 503 are respectively fixed on the sliders. The second middle plates 504 are slidably connected to the top of the second middle plates 504. A spring is disposed between the first middle plates 503 and the second middle plates 504. Both the second middle plates 504 and the first middle plates 503 are provided with coaxial threaded grooves. A screw rod 505 is threadedly connected to both threaded grooves.

[0045] Specifically, the width adjustment component 5 drives two sets of sliders to move synchronously in opposite directions along the slide rail 502 via a bidirectional ball screw 501, thereby adjusting the spacing of the first intermediate plate 503. The second intermediate plate 504 can slide on the first intermediate plate 503, and achieves elastic connection and fine adjustment through the cooperation of the toggle rod 505 and spring, ensuring adaptive clamping and stable conveying of materials of different widths, combining adjustment efficiency and precision.

[0046] As a further feature of this utility model, it also includes a photoelectric sensor, which is mounted on both sides of the feeding path by a bracket, and the detection end of the photoelectric sensor is aligned with the edge of the roll or the positioning hole.

[0047] Specifically, the system detects edge deviation or misalignment of positioning holes by using a beam of light, and sends the signal back to the control system to adjust the conveying status, such as width adjustment and speed matching, to ensure that the material is accurately conveyed along the preset path.

[0048] When the asynchronous feeding mechanism of the circular cutter is working, the coarse adjustment and elastic fine adjustment of the material width are first completed by the bidirectional ball screw 501 and the torsion bar 505 of the width adjustment component in conjunction with the spring. The servo motor 4 of the drive system drives the first set of active rollers 2, and the mechanical synchronization of multiple sets of active rollers is achieved through the synchronous wheel assembly 3. At the same time, the magnetic coupling between the variable magnet 9 of the inner rotor excitation coil and the permanent magnet 8 of the outer rotor is used. The current controller adjusts the excitation current to change the viscosity of the magnetorheological fluid, thereby realizing the asynchronous fine adjustment of the output torque and speed of each set of active rollers. The driven roller 1 and the active roller 2 clamp and convey the material. The force sensor of the outer rotor assembly 6 provides real-time feedback of the resistance to dynamically adjust the magnetic coupling strength. The photoelectric sensors on both sides of the feeding path monitor the edge of the roll material or the positioning hole. The signal is fed back to the control system, which adjusts the width adjustment component or the speed of the roller group in linkage to ensure that the material is accurately conveyed along the preset path and synchronized with the cutting action of the circular cutter, ultimately achieving efficient, flexible and high-precision feeding control.

[0049] In summary, the asynchronous feeding mechanism of the circular knife machine in this embodiment of the present invention provides overload protection through flexible transmission to avoid damage to materials and equipment, ensures precise synchronization of feeding and cutting through real-time monitoring and control, can automatically adjust conveying parameters according to material characteristics to improve stability, and at the same time reduce mechanical wear and lower maintenance costs.

[0050] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An asynchronous feeding mechanism for a circular knife machine, characterized in that, include: Drive system; Multiple sets of feeding rollers, each set including a drive roller (2) and a driven roller (1), adjacent drive rollers (2) are connected by a synchronous pulley assembly (3), the driven rollers (1) are arranged parallel above the drive rollers (2) by bearings, and the drive motor (4) of the drive system is connected to one of the drive rollers (2). The active roller (2) includes: an inner rotor assembly (7), the main shaft of the inner rotor assembly (7) is mounted and rotated on the frame, and a variable magnet (9) is provided on the outer periphery of the main shaft of the inner rotor assembly (7). The outer rotor assembly (6) rotates on the frame. The outer rotor cylinder of the outer rotor assembly (6) is coaxially sleeved outside the inner rotor assembly (7). Permanent magnets (8) are evenly distributed on the inner wall of the outer cylinder of the outer rotor assembly (6). The permanent magnets (8) and the variable magnets (9) form a closed magnetic circuit.

2. The asynchronous feeding mechanism for a circular knife machine according to claim 1, characterized in that, The inner rotor assembly (7) has an excitation coil wound around the outer circumference of the main shaft and fitted with silicon steel sheets.

3. The asynchronous feeding mechanism for a circular knife machine according to claim 2, characterized in that, The gap between the inner rotor assembly (7) and the outer rotor assembly (6) is filled with magnetorheological fluid, and the excitation coil is connected to the current controller of the drive system via a wire.

4. The asynchronous feeding mechanism for a circular knife machine according to claim 1, characterized in that, It also includes a width adjustment component (5), which includes a bidirectional ball screw (501), a slide rail (502), two sets of first middle plates (503) and two sets of second middle plates (504). The screw end of the bidirectional ball screw (501) is rotatably connected to the inner side of the frame. The slide rail (502) is located on the inner side of the frame. Two sets of sliders are slidably arranged on the slide rail (502). The bidirectional moving ends of the bidirectional ball screw (501) are respectively connected to the two sets of sliders. The two sets of first middle plates (503) are respectively fixed on the sliders. The second middle plate (504) is slidably connected to the top of the second middle plate (504). A spring is provided between the first middle plate (503) and the second middle plate (504). Both the second middle plate (504) and the first middle plate (503) are provided with coaxial threaded grooves. A screw rod (505) is threadedly connected in both of the threaded grooves.

5. The asynchronous feeding mechanism for a circular knife machine according to claim 4, characterized in that, It also includes photoelectric sensors, which are mounted on both sides of the feeding path via brackets, with the detection end of the photoelectric sensors aligned with the edge or positioning hole of the roll material.

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