Floating fly cutter device

Abstract

The invention discloses a floating fly cutter device which comprises a fixed frame, a movable frame, an overturning frame and a fly cutter assembly, the two sides of the movable frame are horizontally and slidably connected with the fixed frame, a movable driving device is arranged between the movable frame and the fixed frame, one ends of the two sides of the overturning frame are hinged to the movable frame, and overturning guide columns are arranged at the other ends of the two sides of the overturning frame; a turnover guide groove is formed in the fixed frame, the turnover guide column extends into the turnover guide groove, the fly cutter assembly comprises a transverse moving module and a cutter assembly, the transverse moving module is installed on the turnover frame, the cutter assembly is installed at the transverse moving end of the transverse moving module, and a floating roller assembly is arranged on the moving frame; the floating roller assembly can clamp a product and guide and pull the product; the floating fly-cutter device continuously provides stable clamping traction force in the cutting process, it is guaranteed that the lengths of cut-off sections are consistent, notches are smooth, the cutter assembly automatically turns over to be away from products after cutting is completed, and the surfaces of the products are prevented from being scratched in the return stroke process.

Description

Technical Field

[0001] This invention relates to the field of product cutting devices, and more specifically to a floating flying knife device. Background Technology

[0002] In the field of continuous coil processing, the flying knife device is the core equipment for achieving dynamic fixed-length cutting of materials. Its key technology lies in ensuring that the cutting unit moves synchronously with the material during the cross-cutting process, thereby ensuring cut quality and maintaining continuous production line operation.

[0003] Currently, common flying knife devices typically consist of a fixed base, a horizontally movable tool holder, and a cutting assembly mounted on the tool holder. Synchronous following and cutting actions are achieved through cylinders or servo motors. Building upon these basic functions, existing technologies are continuously evolving to meet higher production speeds and more stringent processing requirements. For example, linear guides are used to improve movement smoothness, or sensors are used to detect material position to improve length control accuracy.

[0004] However, in real-world production scenarios involving high speed, high precision, and diverse materials, the inherent structure of such devices still presents several limitations. Firstly, most devices lack a mechanism for effectively and stably clamping and traction of the material at the moment of cutting. Tension changes or slight vibrations in the material can easily lead to deviations in cutting length or uneven cuts. Secondly, if the synchronization of the moving blade holder during reciprocating motion relies solely on unilateral drive or ordinary guide rails, accumulated errors can easily occur over long-term operation, resulting in a tilted cutting trajectory. Furthermore, after cutting, the blade typically needs to return to its starting position with the moving parts. Without a reasonable blade disengagement mechanism, the sharp blade can easily scratch the edges or surfaces of the cut material during the return stroke, which is particularly detrimental to sensitive materials such as protective films and coated fabrics.

[0005] To improve the above situation, some improved designs have attempted to introduce independent clamping rollers or more complex motion control systems, but this often makes the mechanism cumbersome, increases costs and maintenance difficulty, and is inconvenient to adjust in the production of multiple varieties and variable parameters. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a floating blade device that continuously provides stable clamping traction during the cutting process, effectively suppressing product vibration or slippage, ensuring consistent cut length and a smooth cut, and automatically flipping the blade assembly away from the product after cutting to avoid scratching the product surface during the return stroke, making it particularly suitable for surface-sensitive materials.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A floating knife device includes a fixed frame, a movable frame, a flipping frame, and a knife assembly. The movable frame is horizontally slidably connected to the fixed frame on both sides, and a moving drive device is provided between the movable frame and the fixed frame. One end of each side of the flipping frame is hinged to the movable frame, and the other end of each side is provided with a flipping guide post. The fixed frame is provided with a flipping guide groove, and the flipping guide post extends into the flipping guide groove. The knife assembly includes a traversing module and a cutting assembly. The traversing module is mounted on the flipping frame, and the cutting assembly is mounted on the traversing end of the traversing module. The movable frame is provided with a floating roller assembly, which can clamp and guide the product.

[0008] Furthermore, the floating roller assembly includes a first floating frame, a second floating frame, and a floating cylinder. The first and second floating frames are both hinged to the movable frame. The body and piston rod of the floating cylinder are respectively hinged to one end of the first and second floating frames. The other ends of the first and second floating frames are respectively connected to the first floating roller and the second floating roller.

[0009] Furthermore, the fixed frame is provided with horizontally arranged fixed slide rails on both sides, and the movable frame is provided with sliders on both sides, the sliders being mounted on the fixed slide rails for sliding connection.

[0010] Furthermore, the moving drive device includes a moving cylinder, which is horizontally mounted on the moving frame, and the piston rod of the moving cylinder is connected to the fixed frame. When the piston rod of the moving cylinder extends or retracts, it can drive the moving frame to move horizontally on the fixed frame.

[0011] Furthermore, the fixed frame is provided with synchronous gears on both sides, and the movable frame is provided with synchronous racks on both sides, and the synchronous gears and synchronous racks mesh.

[0012] Furthermore, the flipping guide groove is L-shaped, with its long side arranged horizontally and its short side arranged vertically, and the short side located in front of the moving frame in the direction of movement.

[0013] The lateral movement module further includes a lateral movement drive motor, a fixed base, a drive pulley, a driven pulley, and a movable base. The fixed base is connected to the tilting frame. The drive pulley and the driven pulley are mounted at both ends of the fixed base. The movable base is slidably connected to the fixed base. The movable drive motor is mounted on the fixed base and connected to the drive pulley. A synchronous belt is mounted on the drive pulley and the driven pulley. The movable base is fixedly connected to the synchronous belt. The cutter assembly is mounted on the movable base.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Cutting precision is significantly improved The floating roller assembly uses a cylinder to drive the double floating frame to adaptively clamp the product, continuously providing stable traction during the cutting process, effectively suppressing product shaking or slippage, and ensuring consistent cutting length and a smooth cut.

[0015] The synchronous gear and rack structure ensures that the movement of both sides of the moving frame is completely synchronized, avoiding blade tilting or cutting line skewing caused by asynchronous left and right displacement.

[0016] The transverse module uses synchronous belt drive, which ensures smooth movement and accurate positioning. Together with the cutter assembly, it achieves precise control of the transverse cutting path.

[0017] 2. Highly adaptable and capable of handling various process conditions. The clamping force of the floating roller can be infinitely adjusted by the cylinder pressure, making it suitable for products of different thicknesses, materials and tensions, such as films, rubber, non-woven fabrics, aluminum foil, etc.

[0018] The flip guide groove is designed in an "L" shape, which allows the cutter to continue moving forward with the moving frame and automatically flip after cutting, avoiding scratching the surface of the product during the return stroke. It is especially suitable for surface-sensitive materials.

[0019] The overall structure can adjust the movement rhythm of the moving cylinder and the transverse motor according to the production line speed, achieving compatibility from low-speed to high-speed production.

[0020] 3. High degree of automation, improving production efficiency. The entire cutting process—including feeding, clamping, cutting, lifting, and resetting—can be fully automated in a cycle without manual intervention, making it suitable for integration into continuous automated production lines.

[0021] The horizontal movement is driven by a movable cylinder, which has a fast response and high reciprocating frequency, making it suitable for high-frequency cutting tasks.

[0022] The cutting assembly can be lifted as a whole with the tilting frame, making it easy to clean, replace or maintain the blades without stopping the machine.

[0023] 4. Stable operation and high equipment reliability Fixed slide rails and sliders provide high rigidity support and smooth guidance, with strong load-bearing capacity, suitable for long-term high-frequency operation; the various moving parts are coupled through mechanical structures (such as guide grooves, gear racks), and the actions are coordinated and reliable, making it less prone to failures caused by electrical or control asynchrony; the overall structure is compact, with good rigidity, low vibration, and low noise, which helps to maintain a stable production environment.

[0024] 5. Easy to maintain and long service life The main moving parts, such as slide rails, sliders, timing belts, and cylinders, are all standardized components, making replacement convenient and maintenance costs low. The tilting and traversing mechanisms are rationally laid out, facilitating lubrication, cleaning, and inspection. The equipment has a simple structure, requiring no complex debugging; routine maintenance can be performed by general operators. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 A schematic diagram of the structure of a floating flying knife device. Figure 1 ; Figure 2 Cross-section of a floating flying knife device Figure 1 ; Figure 3 A schematic diagram of the structure of a floating flying knife device. Figure 2 ; Figure 4 Cross-section of a floating flying knife device Figure 2 .

[0026] The components in the diagram are labeled as follows: 1. Fixed frame; 2. Moving frame; 3. First floating frame; 4. Second floating frame; 5. Floating cylinder; 6. First floating roller; 7. Second floating roller; 8. Flipping guide groove; 9. Flipping frame; 10. Cutting assembly; 11. Moving cylinder; 12. Synchronous gear; 13. Synchronous rack; 14. Slider; 15. Flipping guide post; 16. Lateral movement module. Detailed Implementation

[0027] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0028] Furthermore, 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 technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0029] A floating knife device includes a fixed frame 1, a movable frame 2, a flipping frame 9, and a knife assembly. The two sides of the movable frame 2 are horizontally slidably connected to the fixed frame 1, and a moving drive device is provided between the movable frame 2 and the fixed frame 1. One end of each side of the flipping frame 9 is hinged to the movable frame 2, and the other end of each side is provided with a flipping guide post 15. The fixed frame 1 is provided with a flipping guide groove 8, and the flipping guide post 15 extends into the flipping guide groove 8. The knife assembly includes a transverse module 16 and a cutting assembly 10. The transverse module 16 is mounted on the flipping frame 9, and the cutting assembly 10 is mounted on the transverse end of the transverse module 16. The movable frame 2 is provided with a floating roller assembly, which can clamp the product and guide and pull the product.

[0030] Preferably, the floating roller assembly includes a first floating frame 3, a second floating frame 4 and a floating cylinder 5. The first floating frame 3 and the second floating frame 4 are both hinged to the movable frame 2. The body and piston rod of the floating cylinder 5 are respectively hinged to one end of the first floating frame 3 and the second floating frame 4. The other ends of the first floating frame 3 and the second floating frame 4 are respectively connected to a first floating roller 6 and a second floating roller 7. The floating roller assembly achieves product clamping through the hinged structure of the first floating frame 3, the second floating frame 4 and the floating cylinder 5. It also has dynamic adjustment of clamping force. The floating cylinder 5 drives the two floating frames to move relative to each other, so that the first floating roller 6 and the second floating roller 7 form an adjustable clamping gap to adapt to products with different thicknesses and tensions. The adaptive clamping prevents the product from slipping or shifting during cutting and from breaking during the cut; it also provides traction guidance when not cutting, ensuring smooth traction and reducing product tension fluctuations; the overall structure is simple, easy to adjust, and suitable for various materials and process conditions.

[0031] Preferably, the fixed frame 1 is provided with horizontally arranged fixed slide rails on both sides, and the movable frame 2 is provided with sliders 14 on both sides, and the sliders 14 are mounted on the fixed slide rails for sliding connection. Specifically, by cooperating with the slider 14 on the movable frame 2 through the horizontal slide rails fixed on both sides of the fixed frame 1, the movable frame 2 can slide smoothly in the horizontal direction with low sliding resistance, smooth movement, improved movement accuracy, good structural rigidity, and strong load-bearing capacity, making it suitable for high-speed reciprocating motion.

[0032] Preferably, the moving drive device includes a moving cylinder 11, which is horizontally mounted on the moving frame 2, and the piston rod of the moving cylinder 11 is connected to the fixed frame 1. When the piston rod of the moving cylinder 11 extends or retracts, it can drive the moving frame 2 to move horizontally on the fixed frame 1. Specifically, the movable cylinder 11 is horizontally mounted on the movable frame 2, and its piston rod is connected to the fixed frame 1. The movable frame 2 is directly driven to move horizontally by the extension and retraction of the cylinder. The power is direct, the response is fast, and the control is simple. It is suitable for short-stroke, high-frequency reciprocating motion scenarios.

[0033] Preferably, the fixed frame 1 is provided with synchronous gears 12 on both sides, and the movable frame 2 is provided with synchronous racks 13 on both sides, and the synchronous gears 12 and synchronous racks 13 mesh. Specifically, synchronous gears 12 are set on both sides of the fixed frame 1, and synchronous racks 13 are set on both sides of the movable frame 2. The synchronous movement of the movable frame 2 is achieved through the meshing of the gears and racks, ensuring that both sides of the movable frame 2 move synchronously, avoiding skewness, and providing high transmission accuracy. This is suitable for cutting scenarios with high positional accuracy requirements.

[0034] Preferably, the flipping guide groove 8 is L-shaped, with its long side arranged horizontally and its short side arranged vertically, and the short side located in front of the moving frame 2 in the moving direction. Specifically, the long side of the flipping guide groove 8 is arranged horizontally and the short side is arranged vertically, with the short side located in front of the direction of movement. When the flipping guide column 15 moves in the groove, it first moves horizontally and then flips vertically upward, realizing the smooth flipping of the flipping frame 9, realizing the automatic lifting and resetting of the blade after cutting, and moving to the product during cutting and away from the product during conveying to avoid secondary scratching of the product. Moreover, the overall structure is compact, the movement trajectory is controllable, and the reliability of the equipment is improved.

[0035] Preferably, the transverse module 16 includes a transverse drive motor, a fixed base, a drive pulley, a driven pulley, and a movable base. The fixed base is connected to the tilting frame 9. The drive pulley and the driven pulley are mounted at both ends of the fixed base. The movable base is slidably connected to the fixed base. The movable drive motor is mounted on the fixed base and connected to the drive pulley. A synchronous belt is mounted on the drive pulley and the driven pulley. The movable base is fixedly connected to the synchronous belt. The cutter assembly 10 is mounted on the movable base. Specifically, the transverse module 16 includes a transverse drive motor, a drive pulley, a driven pulley, a synchronous belt, and a moving seat. The motor drives the drive pulley, which in turn drives the moving seat to slide along the fixed seat via the synchronous belt. This structure provides smooth transmission, low noise, and is suitable for high-speed transverse movement. It is also simple in structure, easy to maintain, and has a low cost.

[0036] advantage: 1. Cutting precision is significantly improved The floating roller assembly uses a cylinder to drive the double floating frame to adaptively clamp the product, continuously providing stable traction during the cutting process, effectively suppressing product shaking or slippage, and ensuring consistent cutting length and a smooth cut.

[0037] The structure of the synchronous gear 12 and the synchronous rack 13 ensures that the movement of both sides of the moving frame 2 is completely synchronized, avoiding the tilting of the cutter or the skewing of the cutting line caused by the asynchronous left and right displacement.

[0038] The transverse module 16 uses synchronous belt drive, which ensures smooth movement and accurate positioning. Together with the cutter assembly 10, it achieves precise control of the transverse cutting path.

[0039] 2. Highly adaptable and capable of handling various process conditions. The clamping force of the floating roller can be infinitely adjusted by the cylinder pressure, making it suitable for products of different thicknesses, materials and tensions, such as films, rubber, non-woven fabrics, aluminum foil, etc.

[0040] The flip guide groove 8 is designed in an "L" shape, which allows the cutter to continue moving forward with the moving frame 2 and automatically flip after cutting, avoiding scratching the surface of the product during the return stroke. It is especially suitable for surface-sensitive materials.

[0041] The overall structure can adjust the movement rhythm of the moving cylinder 11 and the transverse motor according to the production line speed, achieving compatibility from low-speed to high-speed production.

[0042] 3. High degree of automation, improving production efficiency. The entire cutting process—including feeding, clamping, cutting, lifting, and resetting—can be fully automated in a cycle without manual intervention, making it suitable for integration into continuous automated production lines.

[0043] The movable cylinder 11 drives horizontal movement, with fast response and high reciprocating frequency, making it suitable for high-frequency cutting tasks.

[0044] The cutter assembly 10 can be lifted as a whole with the tilting frame 9, which facilitates blade cleaning, replacement or maintenance without stopping the machine.

[0045] 4. Stable operation and high equipment reliability The fixed slide rail and slider 14 provide high rigidity support and smooth guidance, with strong load-bearing capacity, and are suitable for long-term high-frequency operation; the various moving parts are coupled through mechanical structures (such as guide grooves, gear racks), and the actions are coordinated and reliable, making it less likely to cause failures due to electrical or control asynchrony; the overall structure is compact, rigid, vibrates little, and has low noise, which helps to maintain a stable production environment.

[0046] 5. Easy to maintain and long service life The main moving parts, such as the slide rails, slider 14, timing belts, and cylinders, are all standardized parts, making replacement convenient and maintenance costs low. The tilting and traversing mechanisms are rationally laid out, facilitating lubrication, cleaning, and inspection. The equipment has a simple structure, requiring no complex debugging; routine maintenance can be performed by general operators.

[0047] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A floating flying knife device, characterized in that: The device includes a fixed frame, a movable frame, a flipping frame, and a flying knife assembly. The movable frame is horizontally slidably connected to the fixed frame on both sides, and a moving drive device is provided between the movable frame and the fixed frame. One end of each side of the flipping frame is hinged to the movable frame, and the other end of each side is provided with a flipping guide post. The fixed frame is provided with a flipping guide groove, and the flipping guide post extends into the flipping guide groove. The flying knife assembly includes a traversing module and a cutting knife assembly. The traversing module is mounted on the flipping frame, and the cutting knife assembly is mounted on the traversing end of the traversing module. The movable frame is provided with a floating roller assembly, which can clamp the product and guide and pull the product.

2. The floating knife device according to claim 1, characterized in that: The floating roller assembly includes a first floating frame, a second floating frame, and a floating cylinder. The first and second floating frames are both hinged to the movable frame. The body and piston rod of the floating cylinder are respectively hinged to one end of the first and second floating frames. The other ends of the first and second floating frames are respectively connected to the first floating roller and the second floating roller.

3. The floating knife device according to claim 1, characterized in that: The fixed frame has horizontally arranged fixed slide rails on both sides, and the movable frame has sliders on both sides, which are slidably connected to the fixed slide rails.

4. The floating knife device according to claim 1, characterized in that: The moving drive device includes a moving cylinder, which is horizontally mounted on the moving frame, and the piston rod of the moving cylinder is connected to the fixed frame. When the piston rod of the moving cylinder extends or retracts, it can drive the moving frame to move horizontally on the fixed frame.

5. The floating knife device according to claim 1, characterized in that: The fixed frame is provided with synchronous gears on both sides, and the movable frame is provided with synchronous racks on both sides, and the synchronous gears and synchronous racks mesh.

6. The floating knife device according to claim 1, characterized in that: The flipping guide groove is L-shaped, with its long side arranged horizontally and its short side arranged vertically, and the short side located in front of the moving frame in the direction of movement.

7. The floating knife device according to claim 1, characterized in that: The traverse module includes a traverse drive motor, a fixed base, a drive pulley, a driven pulley, and a movable base. The fixed base is connected to the tilting frame. The drive pulley and the driven pulley are mounted at both ends of the fixed base. The movable base is slidably connected to the fixed base. The traverse drive motor is mounted on the fixed base and connected to the drive pulley. A synchronous belt is mounted on the drive pulley and the driven pulley. The movable base is fixedly connected to the synchronous belt. The cutter assembly is mounted on the movable base.

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