A mute damping alloy slitting round knife for a rewinder

Abstract

The utility model relates to rewinding machine technical field, concretely is a kind of rewinding machine with mute damping alloy cutting round knife, it includes: blade body and tool bit, blade body surface is equipped with several damping grooves, several damping grooves are overall fan-shaped, damping groove includes entry end, side wall and exit end, entry end is close to tool bit, the groove body profile of entry end is circular arc, entry end is connected with exit end by side wall, the groove body profile of side wall is wavy, exit end is close to blade body, the groove body profile of exit end is circular arc;Beneficial effects are: the utility model provides a kind of rewinding machine with mute damping alloy cutting round knife, by being equipped with the damping groove mechanism with fan-shaped layout and three-section structure on blade body surface, smooth import, high-efficiency dissipation and stable export to vibration energy are realized, to reduce the vibration and noise of cutting round knife at high speed cutting maximum limit.

Description

Technical Field

[0001] This utility model relates to the field of rewinding machines, specifically a silent, vibration-damping alloy slitting circular knife for rewinding machines. Background Technology

[0002] Rewinding machines are key pieces of equipment in post-processing fields such as papermaking, packaging, film, and nonwoven fabrics. Their main function is to unwind, control tension, trim edges, slit, and finally rewind the master roll material into finished rolls of a specific width and diameter. The operating speed, slitting quality, and noise level of the rewinding process directly affect production efficiency and the quality of the final product.

[0003] In existing technologies, the slitting circular blade is a core component of the rewinding machine, and its performance is crucial. Under high-speed operation, the slitting circular blade needs to precisely and cleanly cut the material. During rewinding, the moment the blade contacts the material, a violent impact occurs, and continuous forced vibration is triggered during high-speed rotation.

[0004] However, traditional slitting circular knives are mostly made of high-speed steel, which produces high-decibel harsh noise when the knife is in use, leading to accelerated equipment wear and excessive noise. To address this problem, this utility model proposes a silent vibration-damping alloy slitting circular knife for rewinding machines. Utility Model Content

[0005] The purpose of this invention is to provide a silent, vibration-damping alloy slitting circular knife for a rewinding machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silent vibration-damping alloy slitting circular knife for a rewinding machine, comprising: a blade body and a blade head; the blade body surface having a plurality of vibration-damping grooves, the plurality of vibration-damping grooves being fan-shaped in general; each vibration-damping groove having an inlet end, a side wall, and an outlet end; the inlet end being close to the blade head, the groove outline of the inlet end being arc-shaped; the inlet end being connected to the outlet end through the side wall, the groove outline of the side wall being wavy; the outlet end being close to the blade body, the groove outline of the outlet end being arc-shaped; and the inlet end and the outlet end being parallel.

[0007] Preferably, the blade has several noise-reducing holes on its surface around the inlet end of the vibration damping groove, and the noise-reducing holes are spaced apart.

[0008] Preferably, the blade has a composite layered structure, including a core layer, a first constraint layer, and a second constraint layer.

[0009] Preferably, the core layer is made of a polymer damping alloy, and the first and second constraint layers are made of high-speed steel.

[0010] Preferably, the first constraint layer is fixedly connected to the core layer by welding, and the core layer is fixedly connected to the second constraint layer by welding.

[0011] Preferably, the blade surface has a mounting hole, and a limit groove is formed on the side surface of the mounting hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention proposes a silent vibration-damping alloy slitting circular blade for a rewinding machine. By opening a vibration-damping groove mechanism with a fan-shaped layout and a three-section structure on the surface of the blade body, it achieves smooth introduction, efficient dissipation and stable output of vibration energy. This solves the problem that traditional slitting circular blades, due to their simple geometric structure, cannot effectively block and dissipate vibration energy, resulting in large cutting vibration and harsh noise. Thus, it minimizes the vibration and noise of the slitting circular blade during high-speed cutting. 2. The present invention proposes a silent vibration-damping alloy slitting circular blade for a rewinding machine. By adopting a composite layered sandwich structure consisting of a polymer damping alloy core layer and a high-speed steel constraint layer welded together, the mechanical vibration energy is efficiently converted into heat energy dissipation within the material. While ensuring that the cutting edge of the blade has the necessary high hardness, high strength and high wear resistance, it also gives the blade body excellent overall damping performance. 3. The present invention proposes a silent vibration damping alloy slitting circular knife for a rewinding machine. Through the integrated design of geometric vibration damping mechanism and material vibration damping mechanism, it realizes the synergistic and multiplicative effect of macroscopic structural energy consumption and microscopic material energy consumption, solves the performance bottleneck of single vibration damping technology route, and thus comprehensively improves the silent vibration damping level, cutting quality stability and service life of the slitting circular knife. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the structure of this utility model; Figure 3 for Figure 2 Schematic diagram of the mid-section AA; Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0014] In the figure: 1. Blade body; 2. Blade head; 3. Vibration damping groove; 4. Inlet end; 5. Side wall; 6. Outlet end; 7. Silencing hole; 8. Core layer; 9. First constraint layer; 10. Second constraint layer; 11. Mounting hole; 12. Limiting groove. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Example 1: Please refer to Figures 1-2 This utility model provides a technical solution: a silent vibration damping alloy slitting circular knife for a rewinding machine. The silent vibration damping alloy slitting circular knife for a rewinding machine includes: a blade body 1 and a blade head 2. The surface of the blade body 1 is provided with a plurality of vibration damping grooves 3. The vibration damping grooves 3 are the main vibration energy dissipation structures. The plurality of vibration damping grooves 3 are fan-shaped in general. The fan-shaped layout can effectively disperse and block the propagation of vibration waves on the blade body 1. The vibration damping grooves 3 include an inlet end 4, a side wall 5 and an outlet end 6. The inlet end 4 is close to the blade head 2. The groove contour of the inlet end 4 is arc-shaped, which can smoothly capture and introduce the vibration energy from the cutter head 2. The inlet end 4 is connected to the outlet end 6 through the side wall 5. The groove contour of the side wall 5 is wavy, which effectively converts the harmful mechanical vibration energy into heat and dissipates it. The outlet end 6 is close to the cutter body 1. The groove contour of the outlet end 6 is arc-shaped, which smoothly guides the residual vibration energy that has been greatly attenuated and directs it to the central area of ​​the cutter body 1. The inlet end 4 and the outlet end 6 are parallel, which ensures the stability and controllability of the energy flow direction. Several silencing holes 7 are opened on the surface of the cutter body 1 around the inlet end 4 of the vibration damping groove 3. The several silencing holes 7 are spaced apart. The surface of the cutter body 1 is provided with mounting holes 11, and the side surface of the mounting holes 11 is provided with limit grooves 12.

[0017] When the rewinder starts, the slitting circular blade rotates at high speed. The blade body 1 is the supporting element, and the vibration damping groove 3 on the surface of the blade body 1 is the primary vibration damping element. Through a carefully designed geometry, the vibration energy from the blade head 2 is smoothly introduced, efficiently dissipated, and steadily discharged, thereby minimizing the vibration and noise of the slitting circular blade during high-speed cutting. The vibration damping groove 3 is fan-shaped. As the main vibration energy dissipation structure, the fan-shaped layout of the vibration damping groove 3 can effectively disperse and block the propagation of vibration waves on the blade body 1. In addition, the fan shape provides a large structural deformation space and can evenly distribute stress, avoiding local stress concentration.

[0018] The inlet end 4 of the vibration damping groove 3 has an arc-shaped profile, which smoothly captures and introduces the vibration energy from the cutter head 2. At the same time, the arc-shaped profile avoids sharp corners, allowing for seamless and impact-free reception of vibration waves, preventing secondary vibrations or stress concentrations caused by abrupt shape changes, and ensuring efficient energy transfer to the next stage. The side wall 5 of the vibration damping groove 3 is the core energy dissipation area. The groove profile of the side wall 5 is wavy, which greatly increases the path length of vibration propagation. When vibration waves pass through, they force the material to undergo repeated and complex bending and shearing deformations. This continuous structural deformation generates huge internal friction, thereby effectively consuming harmful mechanical vibration energy and converting it into heat dissipation. This is the core element for achieving silent vibration reduction.

[0019] The outlet end 6 of the vibration damping groove 3 has an arc-shaped profile and is parallel to the inlet end 4. This allows for the smooth export of significantly attenuated residual vibration energy, guiding it towards the central area of ​​the blade 1. The arc-shaped profile echoes that of the inlet end 4, also ensuring a smooth energy transition and preventing reflection or the generation of new eddies and vibrations at the end of the groove. The parallel design of the outlet end 6 and the inlet end 4 guarantees the stability and controllability of the energy flow direction, ensuring a smooth and efficient vibration damping process. The silencer holes 7 spaced around the inlet end 4 of the vibration damping groove 3 further disrupt sound wave propagation, serving as an auxiliary noise reduction mechanism to absorb noise of specific frequencies.

[0020] Example 2: Based on Example 1, please refer to... Figures 3-4 The blade 1 has a composite layered structure, including a core layer 8, a first constraint layer 9, and a second constraint layer 10. The core layer 8 is made of a polymer damping alloy, and the first constraint layer 9 and the second constraint layer 10 are made of high-speed steel. The first constraint layer 9 is fixedly connected to the core layer 8 by welding, and the core layer 8 is fixedly connected to the second constraint layer 10 by welding. This sandwich structure actively reduces vibration by combining different material properties.

[0021] The composite layered structure of the blade 1 serves as the matrix and energy management core of the entire tool, simultaneously providing structural support and passive vibration reduction. This sandwich structure actively reduces vibration through a combination of different material properties. The core layer 8 acts as the core energy converter and dissipation layer. The polymer damping alloy is a special material with a high internal friction factor. When deformation occurs, strong friction is generated between the molecular chains or crystal structures within the material, efficiently converting the input mechanical vibration energy into heat energy and dissipating it into the environment. The first constraint layer 9 and the second constraint layer 10 sandwich the core layer 8, forcing it to generate greater shear strain, thereby improving its efficiency in converting vibration energy into heat energy. The high-speed steel material provides the tool with the necessary hardness, strength, rigidity, and wear resistance, withstanding the impact and wear during cutting, further ensuring the tool's basic cutting performance and service life.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silent, vibration-damping alloy slitting circular knife for a rewinding machine, characterized in that: include: The blade (1) and the blade head (2) are provided with several vibration damping grooves (3) on the surface of the blade (1). The several vibration damping grooves (3) are fan-shaped as a whole. The vibration damping groove (3) includes an inlet end (4), a side wall (5) and an outlet end (6). The inlet end (4) is close to the blade head (2). The groove outline of the inlet end (4) is arc-shaped. The inlet end (4) is connected to the outlet end (6) through the side wall (5). The groove outline of the side wall (5) is wavy. The outlet end (6) is close to the blade (1). The groove outline of the outlet end (6) is arc-shaped. The inlet end (4) and the outlet end (6) are parallel.

2. The silent, vibration-damping, alloy slitting circular knife for a rewinding machine according to claim 1, characterized in that: The blade (1) has several noise reduction holes (7) on the surface around the inlet end (4) of the vibration damping groove (3), and the noise reduction holes (7) are spaced apart.

3. The silent, vibration-damping alloy slitting circular knife for a rewinding machine according to claim 1, characterized in that: The blade (1) has a composite layered structure, including a core layer (8), a first constraint layer (9), and a second constraint layer (10).

4. The silent, vibration-damping alloy slitting circular knife for a rewinding machine according to claim 3, characterized in that: The core layer (8) is made of a polymer damping alloy, and the first constraint layer (9) and the second constraint layer (10) are made of high-speed steel.

5. A silent, vibration-damping alloy slitting circular knife for a rewinding machine according to claim 3, characterized in that: The first constraint layer (9) is fixedly connected to the core layer (8) by welding, and the core layer (8) is fixedly connected to the second constraint layer (10) by welding.

6. The silent, vibration-damping alloy slitting circular knife for a rewinding machine according to claim 1, characterized in that: The blade (1) has a mounting hole (11) on its surface, and a limit groove (12) is provided on the side surface of the mounting hole (11).

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