A highly durable saw blade

Abstract

This utility model discloses a highly durable saw blade, comprising an alloy saw blade base with a central through hole. The alloy saw blade base has multiple outwardly protruding corners arrayed along its edge, spaced by inwardly recessed openings. Each outwardly protruding corner is an isosceles trapezoid in shape, with its width gradually decreasing outwards from the central through hole. A rivet seat is provided at the upper end of each outwardly protruding corner. The rivet seat is laser-welded to the alloy saw blade base. A cutting tooth plate is connected to the rivet seat via quick-release cylindrical rivets. The cutting tooth plate has a first cutting head and a second cutting head with protruding spacing. Both the first and second cutting heads are folded towards the other side of the alloy saw blade base. The first cutting head gradually tilts upwards from the outside towards the second cutting head, and the second cutting head gradually tilts upwards from the outside towards the first cutting head. The laser-welded rivet seat of this utility model ensures a stable connection between the cutting tooth plate and the base, and the quick-release rivets facilitate maintenance and replacement. The tilting and folding design of the cutting heads disperses cutting resistance, improving the durability of the saw blade.

Description

Technical Field

[0001] This utility model belongs to the field of saw blade technology, specifically, it relates to a highly durable saw blade. Background Technology

[0002] As an indispensable cutting tool in industrial production and processing, the comprehensive performance of saw blades directly determines cutting efficiency, workpiece machining accuracy, and enterprise production and usage costs. Currently, saw blade products on the market generally suffer from the following three core problems: First, insufficient durability. The connection between the blade head and the base is mostly fixed using traditional welding or sintering methods, which are prone to embrittlement at the connection points due to thermal stress, resulting in a low service life. Simultaneously, the force design of the blade head is unreasonable, concentrating the load on a single cutting edge during cutting, causing local wear rates to far exceed those of other areas, shortening the overall service life. Second, significant vibration and noise problems during cutting. The dynamic imbalance of the saw blade during high-speed rotation and the cutting impact force cause severe vibration, not only generating noise pollution as high as 90-110dB, violating workshop environmental protection standards, but also causing vibration between the blade head and the workpiece, resulting in defects such as burrs and chipping on the cut surface, reducing machining accuracy. Furthermore, vibration exacerbates the fatigue wear of the saw blade base. Third, the chip removal effect is poor. The spacing and structural design of traditional saw blades make it difficult to effectively guide the chips out. Chips tend to accumulate in the contact area between the cutting edge and the workpiece, forming "secondary friction". This will not only scratch the machined surface, but also accelerate the wear of the cutting edge. It may even cause the saw blade to jam due to chip blockage, leading to equipment shutdown or safety accidents.

[0003] To address the aforementioned issues, numerous attempts have been made in related technical fields: some solutions utilize high-end materials such as tungsten-cobalt alloys to manufacture the saw blade head, which improves wear resistance, but increases material costs by 3-5 times compared to ordinary saw blade heads, significantly raising user operating costs and hindering large-scale promotion; other solutions increase the thickness of the alloy saw blade substrate to enhance rigidity and reduce vibration, but this increases the substrate weight by 20%-30%, increasing power consumption of the cutting equipment and reducing the saw blade's start-up and braking flexibility, making it extremely unsuitable, especially in scenarios requiring frequent reversal cutting. Furthermore, a few solutions attempt to achieve vibration reduction by creating simple circular holes in the substrate, but the effect is limited, and these solutions do not integrate with the blade head structure and chip removal system for overall optimization, failing to fundamentally solve the synergistic problems of durability, vibration, and chip removal. Therefore, the industry urgently needs a saw blade product with a reasonable structural design, high durability, low vibration and noise, and excellent chip removal performance to balance performance, cost, and practicality. Utility Model Content

[0004] In view of this, the technical problem to be solved by this utility model is to provide a highly durable saw blade. The rivet seat is laser-welded to ensure a firm connection between the blade tooth plate and the base. The quick-release rivets facilitate maintenance and replacement. The double-blade design improves the rationality of the blade head force. At the same time, the gradually decreasing diameter shock-absorbing hole array reduces cutting vibration and noise, improves chip removal, and extends the service life of the saw blade, avoiding the problem of poor durability of previous saw blades.

[0005] To solve the above-mentioned technical problems, this utility model discloses a highly durable saw blade, comprising: The alloy saw blade base has a central through hole. The edge array of the alloy saw blade base has multiple outwardly protruding corners, which are separated by inwardly grooved openings. The outwardly protruding corners are in the shape of an isosceles trapezoid, and their width gradually decreases from the central through hole outwards. A rivet seat is provided at the upper end of the outwardly protruding corner. The rivet seat is laser-welded to the alloy saw blade base. A cutting tooth plate is connected to the rivet seat by a quick-release cylindrical rivet. The cutting tooth plate has a first cutting head and a second cutting head with a protruding gap. Both the first cutting head and the second cutting head are folded to the other side of the alloy saw blade base. The first cutting head gradually tilts upwards from the outside towards the second cutting head, and the second cutting head gradually tilts upwards from the outside towards the first cutting head.

[0006] Furthermore, the distance from the tip of the first cutter head to the center of the alloy saw blade substrate is h1, and the distance from the tip of the second cutter head to the center of the alloy saw blade substrate is h2, where h1 is greater than h2.

[0007] Furthermore, a blade tooth plate is installed on one side of the convex corner, and a stainless steel washer is installed on the other side. The stainless steel washer has a diameter of 14mm and a central hole that matches the rivet seat. The blade tooth plates on adjacent convex corners are staggered on both sides of the alloy saw blade base.

[0008] Furthermore, the lower end of the convex corner is provided with a gradient aperture damping hole array, each convex corner is provided with 3 gradient aperture damping holes with a hole spacing of 5mm, the aperture of the gradient aperture damping holes gradually transitions from 2mm near the alloy saw blade base to 1.5mm outward; the gradient aperture damping holes are filled with sound-absorbing silicone.

[0009] Furthermore, a 0.8mm thick oil-resistant silicone buffer pad is provided between the contact surface of the blade plate and the convex corner. The oil-resistant silicone buffer pad has a diameter of 14mm and is provided with a central hole that matches the rivet seat.

[0010] Furthermore, the non-working area of ​​the alloy saw blade substrate is provided with a spiral silencing groove. The non-working area is an annular area near the central through hole with a width of 15mm. There are a total of 6 spiral silencing grooves, which are evenly distributed, with a groove depth of 3mm and a pitch of 20mm.

[0011] Furthermore, the blade plate is provided with comb-shaped scraping teeth between the first and second cutter heads, with a height of 3mm and a spacing of 2mm.

[0012] Compared with the prior art, the present invention can achieve the following technical effects: Laser-welded rivet seats ensure a secure connection between the cutter plate and the substrate, while quick-release rivets facilitate maintenance and replacement. The tilting and folding design of the cutter head disperses cutting resistance, and the dimensional relationship between h1 and h2 enables a reasonable division of labor between the main and auxiliary cutter heads, reducing wear on individual cutter heads. Oil-resistant silicone buffer pads and stainless steel gaskets further protect the connection structure between the cutter plate and the substrate, extending the overall service life.

[0013] The combination of gradually decreasing aperture damping holes and sound-absorbing silicone effectively absorbs vibration waves, while the spiral sound-absorbing grooves reduce noise using aerodynamics and acoustic interference principles. The staggered arrangement of adjacent blade plates optimizes dynamic balance, reduces vibration during high-speed rotation, and improves the working environment.

[0014] The overall structure is reasonably designed and suitable for cutting various materials. The quick-release structure reduces maintenance costs, and the high-strength base and the synergistic effect of various functional components ensure that the saw blade can maintain stable performance even in high-intensity operations.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a highly durable saw blade according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of adjacent blade plates according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the blade plate according to an embodiment of the present utility model.

[0017] Figure label: The alloy saw blade has a base 10, a central through hole 11, an outwardly protruding corner 20, an inner groove 30, a toothed plate 40, a first cutter head 41, a second cutter head 42, a stainless steel pad 50, a gradually changing diameter vibration damping hole 60, and a spiral silencing groove 70. Detailed Implementation

[0018] The following will describe in detail the implementation of this utility model with reference to the accompanying drawings and embodiments, so that the implementation of this utility model can be fully understood and carried out based on how technical means are used to solve technical problems and achieve technical effects.

[0019] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of a highly durable saw blade according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of adjacent blade plates according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the blade plate according to an embodiment of the present utility model.

[0020] As shown in the figure, this embodiment provides a highly durable saw blade with an alloy saw blade base 10 having a central through hole 11 as the core load-bearing structure. The inner diameter of the central through hole 11 can be designed in various sizes such as 25mm, 30mm, and 40mm according to the specifications of common cutting equipment spindles. The hole wall is processed by precision grinding, and the roughness is controlled within Ra0.8μm. A keyway structure can be set as needed for a flat key fit with the equipment spindle to ensure that there is no relative slippage when the saw blade rotates at high speed, thus ensuring transmission accuracy and safety of use.

[0021] The alloy saw blade base 10 has multiple convex corners 20 evenly arranged along its circumferential direction. These convex corners 20 are spaced apart by recessed openings 30, forming independent cutting unit mounting areas. This disperses the cutting load to each independent unit, preventing stress from continuously accumulating at the edge of the alloy saw blade base 10. The recessed openings 30 also facilitate chip removal. The convex corners 20 are generally isosceles trapezoidal in shape, with their width gradually decreasing outwards from the central through-hole 11, forming a structure that is wider at the inside and narrower at the outside. This design conforms to the laws of mechanical transmission, allowing the cutting force borne by the blade head to be evenly transmitted along the trapezoidal slope to the main body of the alloy saw blade base 10, preventing deformation or breakage of the alloy saw blade base 10 due to localized stress overload. Simultaneously, the trapezoidal structure of the convex corners 20 provides ample bearing area for the installation of the toothed plate 40, and the relatively thick rear end improves impact resistance while ensuring connection stability. Depending on the saw blade diameter, the number of convex corners 20 can be adjusted between 16 and 24.

[0022] The upper surface of the protruding corner 20 is milled to form a flat mounting surface, on which a rivet seat is fixedly mounted. This U-shaped seat engages with the protruding corner 20 via a groove and key, similar to a mortise and tenon joint. The rivet seat is forged from 304 stainless steel, providing excellent corrosion resistance and connection strength. The rivet seat and the alloy saw blade base 10 are fixed using fiber laser welding. A 1500W fiber laser welding machine is used, with a welding speed set to 5mm / s. Argon gas protection (15L / min) is employed during welding to prevent weld oxidation. Laser welding achieves a metallurgical bond between the rivet seat and the alloy saw blade base 10, with a weld penetration depth exceeding 3mm and a shear strength exceeding 300MPa, far surpassing traditional arc welding joints. This effectively ensures a tight bond between the rivet seat and the alloy saw blade base 10, preventing loosening or detachment under long-term high-speed rotation and impact loads. The rivet seat has an internal threaded hole for connecting the toothed plate 40 with a quick-release cylindrical rivet.

[0023] Furthermore, the blade plate 40 is integrally formed with a first cutter head 41 and a second cutter head 42 with a protruding gap. The distance between the two cutter heads is 8mm, and the cutting edges are precision ground to ensure low initial cutting resistance. Both the first cutter head 41 and the second cutter head 42 are processed by stamping and folding, with a folding angle of 80-90°, and both are folded towards the other side of the alloy saw blade base 10, forming a unique bidirectional cutting structure. Specifically, the first cutter head 41 gradually tilts upward from the outside towards the second cutter head 42 at an angle of 30°; the second cutter head 42 also gradually tilts upward from the outside towards the first cutter head 41 at an angle of 30°. This bidirectional tilting and folding composite structure design allows the cutter head to gradually cut into the material like a step during the cutting process, distributing the concentrated cutting force borne by the traditional single cutter head to different cutting edge parts of the two cutter heads. The stress load on each cutter head is reduced by 40%-50%, effectively reducing the wear rate of the cutter head. At the same time, the tilting structure can guide the chips to be discharged in a specific direction, avoiding the accumulation of chips near the cutter head, making it widely applicable to the cutting of grass or shrubs.

[0024] Preferably, the distance from the tip of the first cutter head 41 to the center of the alloy saw blade base 10 is h1, and the distance from the tip of the second cutter head 42 to the center of the alloy saw blade base 10 is h2, with h1 being greater than h2, and the difference between the two controlled within the range of 2-5mm. This dimensional relationship makes the first cutter head 41 the main cutting cutter head, which preferentially contacts the material to be cut when the saw blade rotates, bearing 60%-70% of the cutting load and performing the main material removal operation; the second cutter head 42, as the auxiliary cutting cutter head, follows the first cutter head 41 and contacts the workpiece, trimming the rough surface formed by the first cutter head 41, removing surface burrs and protrusions, and improving the cutting surface accuracy to within ±0.1mm. This reasonable division of labor between the main and auxiliary cutter heads not only avoids localized rapid wear caused by excessive force on a single cutter head, but also improves the processing quality through secondary trimming, meeting the requirements of high-precision processing.

[0025] Furthermore, this invention features a stainless steel shim 50 installed on the corresponding position on the other side of the protruding corner portion 20, while simultaneously installing a toothed plate 40 on one side. The stainless steel shim 50 is made of 304 stainless steel sheet, stamped to a diameter of 14mm and a thickness of 2mm. It has a central hole that matches the positioning boss of the rivet seat, and is simultaneously fixed to the toothed plate 40 via the rivet seat. More importantly, the toothed plates 40 on adjacent protruding corner portions 20 are arranged in a staggered manner on both sides of the alloy saw blade base 10. Specifically, the toothed plates 40 on odd-numbered protruding corner portions 20 are installed on the front of the alloy saw blade base 10, while those on even-numbered portions are installed on the back. This symmetrical arrangement further optimizes the overall dynamic balance performance of the saw blade, significantly reducing the impact of vibration on cutting accuracy and equipment during high-speed rotation.

[0026] In another embodiment, a 0.8mm thick oil-resistant silicone buffer pad is added between the contact surfaces of the toothed plate 40 and the outwardly convex corner portion 20. This buffer pad is made of a blend of nitrile rubber and silicone, possessing excellent elastic recovery and oil resistance. It maintains stable performance within a temperature range of -20℃ to 120℃, fully adapting to the corrosive and frictionally heated environment of cutting fluid during cutting operations. During cutting, the buffer pad can absorb more than 80% of high-frequency impact vibrations through its own elastic deformation, reducing rigid collisions between the toothed plate 40 and the alloy saw blade substrate 10, and preventing micro-cracks in the toothed plate 40 due to vibration. Simultaneously, the buffer pad fills the micro-gap between the toothed plate 40 and the outwardly convex corner portion 20, resulting in a more uniform pressure distribution, preventing damage to the connection points caused by localized stress concentration, and further protecting the connection structure between the toothed plate 40 and the alloy saw blade substrate 10.

[0027] This utility model features an array of gradually decreasing diameter damping holes 60 at the lower end of the convex corner portion 20. Each convex corner portion 20 has three evenly spaced gradually decreasing diameter damping holes 60 along its length, with the hole spacing strictly controlled at 5mm to ensure uniform absorption of vibration waves. The gradually decreasing diameter damping holes 60 are machined using a stepped drilling process, with the hole diameter gradually transitioning from 2mm near the alloy saw blade substrate 10 to 1.5mm outwards, forming a gradually decreasing structure with a larger inner diameter and a smaller outer diameter. In this way, vibration waves of the same frequency will experience varying degrees of reflection and attenuation when passing through the gradually decreasing diameter damping holes 60, effectively dispersing and absorbing broadband vibrations generated during cutting and preventing resonance.

[0028] The gradually decreasing aperture damping hole 60 is filled with high-temperature resistant sound-absorbing silicone. This silicone is made of methyl vinyl silicone rubber, ensuring a tight fit between the silicone and the hole wall. The sound-absorbing silicone not only further enhances the vibration absorption effect, but also converts vibration energy into heat energy through its viscoelastic properties. At the same time, it effectively blocks the transmission of noise through the gradually decreasing aperture damping hole 60, reducing the noise level during the cutting process by 20-30 dB.

[0029] In addition to the gradually decreasing diameter damping holes 60, this invention also incorporates a spiral silencing groove 70 in the non-working area of ​​the alloy saw blade substrate 10, forming a dual damping and noise reduction system. The non-working area is defined as an annular region near the central through-hole 11, with a width of 15mm. This region does not participate in direct cutting and is an ideal location for optimizing the dynamic performance of the saw blade. The spiral silencing groove 70 is machined using a five-axis milling process, with a total of six grooves evenly distributed along the circumference. The groove depth is 3mm, the pitch is 20mm, and the rotation direction is consistent with the rotation direction of the saw blade (clockwise rotating saw blades use right-handed grooves). When the saw blade rotates at high speed, the spiral silencing groove 70 guides air to flow smoothly along the groove, reducing wind resistance noise. Simultaneously, the air column within the groove interferes with the sound waves generated by vibration, canceling out some low-frequency noise. Combined with the high-frequency vibration absorption effect of the gradually decreasing aperture damping holes 60, a noise reduction system covering a wide frequency range is formed, ensuring that the noise level of the saw blade during cutting operations remains stable below 75 dB, far below the national industrial workshop noise emission standard (85 dB), significantly improving the working environment. Furthermore, the spiral silencing grooves 70 reduce the weight of the alloy saw blade substrate 10, improving the saw blade's rotational flexibility without compromising rigidity, and reducing equipment energy consumption.

[0030] Furthermore, this invention features comb-shaped scraping teeth integrally formed on the cutting plate 40 between the first cutting head 41 and the second cutting head 42. The scraping teeth have a serrated design with a tooth tip angle of 60°, a height of 3mm, and a tooth spacing of 2mm. They can be laser-cut to reduce the adhesion between chips and the tooth surface. During the cutting process, while the first cutting head 41 completes the main cutting and the second cutting head 42 performs finishing, the comb-shaped scraping teeth simultaneously act on the cutting surface. Their inverted triangular tooth shape effectively scrapes away residual chips adhering to the cutting surface and chips stuck between the two cutting heads. This efficient chip removal function avoids secondary cutting caused by chip accumulation near the cutting head, reduces chip wear on the cutting edge, and extends the service life of the cutting plate 40. Simultaneously, the clean cutting area ensures that the cutting head maintains stable contact with the workpiece, further improving cutting accuracy and preventing saw blade jump caused by chip jamming.

[0031] In summary, the overall structure of this utility model is suitable for cutting various materials, the quick-release structure reduces maintenance costs, and the synergistic effect of the high-strength base and various functional components ensures that the saw blade can maintain stable performance even in high-intensity operations.

[0032] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A highly durable saw blade, comprising an alloy saw blade substrate having a central through hole, characterized in that, The alloy saw blade substrate has multiple outwardly protruding corners on its edge array. These protruding corners are spaced apart by inwardly recessed openings and are in the shape of an isosceles trapezoid, with their width gradually decreasing outward from the central through-hole. A rivet seat is provided at the upper end of each protruding corner, and the rivet seat is laser-welded to the alloy saw blade substrate. A cutting tooth plate is connected to the rivet seat via quick-release cylindrical rivets. The cutting tooth plate has a first cutting head and a second cutting head that protrude and are spaced apart. Both the first and second cutting heads are folded towards the other side of the alloy saw blade substrate. The first cutting head gradually tilts upward from the outside towards the second cutting head, and the second cutting head gradually tilts upward from the outside towards the first cutting head.

2. The high-durability saw blade according to claim 1, characterized in that, The distance from the tip of the first cutter head to the center of the alloy saw blade substrate is h1, and the distance from the tip of the second cutter head to the center of the alloy saw blade substrate is h2, where h1 is greater than h2.

3. The high-durability saw blade according to claim 1, characterized in that, The blade tooth plate is installed on one side of the convex corner portion, and a stainless steel washer is installed on the other side. The stainless steel washer has a diameter of 14mm and has a central hole that matches the rivet seat. The blade tooth plates on adjacent convex corner portions are staggered on both sides of the alloy saw blade base.

4. The high-durability saw blade according to claim 1, characterized in that, The lower end of the convex corner is provided with a gradient aperture damping hole array. Each convex corner is provided with 3 gradient aperture damping holes with a hole spacing of 5mm. The aperture of the gradient aperture damping hole gradually transitions from 2mm near the alloy saw blade substrate to 1.5mm outward. The gradient aperture damping hole is filled with sound-absorbing silicone.

5. The high-durability saw blade according to claim 1, characterized in that, The contact surface between the blade plate and the convex corner is provided with a 0.8mm thick oil-resistant silicone buffer pad, the oil-resistant silicone buffer pad having a diameter of 14mm and a central hole adapted to the rivet seat.

6. The high-durability saw blade according to claim 1, characterized in that, The non-working area of ​​the alloy saw blade substrate is provided with a spiral silencing groove. The non-working area is an annular area near the central through hole with a width of 15mm. There are a total of 6 spiral silencing grooves, which are evenly distributed, with a groove depth of 3mm and a pitch of 20mm.

7. The high-durability saw blade according to claim 1, characterized in that, The blade plate is provided with comb-shaped scraping teeth between the first cutter head and the second cutter head, and the scraping teeth are 3mm high and 2mm apart.

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