A universal precision cutting piece for dry cutting various hard and brittle materials

Abstract

The utility model provides a kind of for dry cutting a variety of hard brittle materials's universal general type fine cutting piece, including saw blade base body and tool bit, recess structure is set in both sides surface of tool bit, recess structure includes a plurality of regular pit equidistant distribution along circumferential direction, any one regular pit is equipped with the reinforcing part for enhancing the strength of tool bit;Tool bit is in the edge profile of thickness direction and is sawtooth structure, sawtooth structure is constituted by a plurality of continuous distribution's convex tooth and tooth slot.The fine cutting piece is designed by recess structure and sawtooth structure, can realize efficient heat dissipation, reduce cutting resistance, reinforcing part can compensate slotting intensity loss, prevent broken tooth and crack tooth, while quickly bite into material to avoid skidding, smooth chip removal, adapt to a variety of hard brittle materials dry cutting, significantly improve cutting efficiency, service life and operation feeling.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically a universal precision slicer for dry cutting various hard and brittle materials. Background Technology

[0002] Diamond saw blades are widely used in construction, decoration, and stone processing to cut materials such as ceramic tiles, slabs, artificial quartz stone, marble, and granite. During dry cutting (without water cooling), the intense friction between the blade and the material generates high temperatures, easily leading to blade burn-out and cracking. Traditional blades often have a continuous, smooth surface structure, resulting in a large contact area and high resistance during cutting. This not only reduces cutting efficiency but also exacerbates heat buildup, affecting the blade's lifespan and operator feel.

[0003] Furthermore, existing cutting heads typically have straight edges, making it difficult to quickly grip the material surface in the initial cutting stage, leading to slippage and jumping, and poor feed smoothness. The debris generated during cutting is also difficult to remove effectively, further increasing frictional resistance and heat, and accelerating cutting head wear. Some cutting heads have grooves to reduce resistance, but this reduces the cutting head's strength, making it prone to tooth breakage and cracking when cutting hard and brittle materials.

[0004] Therefore, there is an urgent need for a precision slicing blade structure that has strong heat dissipation, low cutting resistance, high structural strength, and is easy to cut into materials. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a universal precision cutting blade for dry cutting various hard and brittle materials. This blade improves heat dissipation, drag reduction, chip removal, and structural strength, thereby enhancing cutting performance. The precision cutting blade utilizes a grooved and serrated structure design to achieve efficient heat dissipation and reduce cutting resistance. The reinforcing section compensates for strength loss due to grooving, preventing tooth breakage and cracking. Simultaneously, it quickly bites into the material to prevent slippage and facilitates smooth chip removal. Suitable for dry cutting various hard and brittle materials, it significantly improves cutting efficiency, service life, and user experience.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a universal precision cutting tool for dry cutting various hard and brittle materials, comprising a saw blade substrate and a cutting head attached to the outer edge of the saw blade substrate. The cutting head has groove structures on both sides, each groove structure comprising multiple regularly spaced pits distributed equidistantly along the circumferential direction. Each regularly spaced pit contains a reinforcing part to enhance the strength of the cutting head. The cutting head has a serrated edge profile along the thickness direction, consisting of multiple continuously distributed protrusions and grooves. The reinforcing part includes a herringbone-shaped reinforcing rib and a large-character-shaped reinforcing rib, which are sequentially distributed along the radial direction of the cutting head.

[0007] Furthermore, the groove structures on both sides of the cutter head are arranged in a staggered manner, so that the convex teeth and grooves of the serrated structure are alternately distributed along the thickness direction.

[0008] Furthermore, the regular recesses of the groove structure and the tooth grooves of the serrated structure are interconnected to form a connected airflow channel.

[0009] Furthermore, the cutting head is composed of a matrix and diamond particles, and the groove structure and serrated structure are formed on the surface of the matrix.

[0010] Furthermore, the saw blade substrate is a circular thin sheet, and the cutting head is continuously or segmented along the outer circumference of the saw blade substrate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The groove structure on both sides of the blade reduces the contact area between the blade and the cutting surface, thus reducing frictional resistance. At the same time, the groove forms an airflow channel when the saw blade rotates at high speed, enhancing the air cooling effect and quickly removing the heat generated by dry cutting, preventing the blade from burning and cracking.

[0013] 2. Each regular recess is equipped with herringbone-shaped and T-shaped reinforcing ribs, which compensate for the weakening of the cutter head strength caused by the grooving, effectively prevent tooth breakage and cracking caused by impact when cutting hard and brittle materials, and improve the life of the cutter head.

[0014] 3. The serrated structure on the edge of the cutter head allows the tips of the protruding teeth to make point contact with the workpiece at the beginning of the cut, reducing the contact area, increasing the cutting pressure, achieving rapid bite, and avoiding slippage and jumping; the grooves between adjacent protruding teeth form a chip-collecting and chip-removing space, which can remove chips in time, reduce the additional friction and wear caused by chip accumulation, and help maintain the sharpness of the cutter head.

[0015] 4. The groove structure and the serrated edge are interconnected, allowing airflow and chips to be smoothly discharged from the tooth groove along the groove, further enhancing the heat dissipation and chip removal effect; the serrated structure increases the perimeter of the cutter edge, making the cutting load distribution more uniform, and with the support of reinforcing ribs, it improves the overall impact resistance and toughness of the cutter head and reduces the risk of tooth breakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the universal precision slicer in this utility model.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is one of the structural schematic diagrams of the universal precision slicer in the thickness direction of this utility model.

[0019] Figure 4 This is the second schematic diagram of the universal precision slicer in this utility model from the perspective of thickness.

[0020] Figure reference numerals: 1. Saw blade base; 2. Cutting head; 3. Groove structure; 31. Regular pit; 32. Reinforcing part; 321. Herringbone reinforcing rib; 322. T-shaped reinforcing rib; 323. Convex tooth; 324. Tooth groove. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see Figures 1 to 4 This invention provides a universal precision saw blade for dry cutting various hard and brittle materials, comprising a saw blade substrate 1 and a cutting head 2 attached to the outer edge of the saw blade substrate 1. The saw blade substrate 1 is a circular thin sheet, usually made of steel; the cutting head 2 is arranged circumferentially along the outer edge of the substrate, and can be arranged in a continuous ring or segmented blocks. The cutting head 2 is composed of a metal matrix and diamond particles, which are bonded to the substrate through powder metallurgy.

[0023] Both sides of the cutter head 2 are provided with groove structures 3 with specific patterns. The groove structure 3 includes multiple regular pits 31 that are equidistantly distributed along the circumference. Each regular pit 31 is provided with a reinforcing part 32 to enhance the structural strength of the cutter head.

[0024] In this embodiment, the reinforcing part 32 consists of a herringbone-shaped reinforcing rib 321 and a large-character-shaped reinforcing rib 322, which are distributed sequentially from the outside to the inside along the radial direction of the cutter head 2. The wall thickness and height of the reinforcing ribs can be optimized according to the cutter head size to achieve a balance between strength compensation and drag reduction.

[0025] Because the groove structures 3 on both sides of the cutter head 2 are staggered (i.e., the positions of the pits on both sides are not completely aligned along the circumferential direction), when viewed from the thickness direction, the edge contour of the cutter head 2 presents a serrated structure. This serrated structure is composed of multiple continuously distributed protrusions 323 and grooves 324. The positions of the protrusions 323 correspond to the solid portion between the pits on both sides, and the grooves 324 correspond to the notches of the pits from this perspective. The regular pits 31 of the groove structure 3 and the grooves 324 of the serrated structure are interconnected, forming a continuous airflow channel and chip removal channel from the surface of the cutter head to the edge.

[0026] In this invention, the groove structure and the serrated structure are formed on the surface of the tire body.

[0027] In this invention, the metal matrix of the cutter head 2 is composed of the following components by mass percentage: JF alloy powder: 40%-60%, copper-tin alloy powder: 30%-50%, nickel powder: 4%-10%, and diamond concentration of 8%-15%, wherein the diamond particle size is 50-70 mesh. The JF alloy powder has the following composition by mass percentage: iron: 50%-60%, copper: 20-35%, tin: 5-8%, phosphorus: 1-2%, with the balance being unavoidable impurities. The JF alloy powder has a bending strength of 1000-1200 MPa, a particle size of 200-300 mesh, a low oxygen content (≤3000 ppm), and is spherical. The copper-tin alloy powder is prepared by diffusion and has an irregular shape.

[0028] As an optimal formulation, the metal matrix comprises the following mass percentages: 50% JF alloy powder, 45% copper-tin alloy powder, and 5% nickel powder; the diamond concentration is 8%. Precision cutters using this specific ratio exhibit excellent overall performance when cutting 10mm thick ceramic tiles and 18mm thick granite, characterized by fast cutting speed, continuous cutting without sparking, and a smooth cutting feel.

[0029] The method for preparing the universal precision slide includes the following steps:

[0030] S1: Weigh JF alloy powder, copper-tin alloy powder, and nickel powder according to the proportion, mix them evenly to obtain a matrix mixed powder; the JF alloy powder is prepared by water atomization process, with atomization pressure of 10-15MPa and melting temperature of 1500-1600℃ to obtain spherical powder morphology.

[0031] S2: Add diamond particles with a particle size of 50-70 mesh and a concentration of 8%-15% to the matrix mixture powder, mix evenly again to obtain the cutting head forming material;

[0032] S3: The cutting head forming material is loaded into the mold and pressed into a cutting head 2 blank under a pressure of 200-220MPa through a cold pressing process; the pressure of the cold pressing process is 200-220MPa, the sintering temperature is about 780℃, and the sintering time is about 15 minutes.

[0033] S4: After assembling the blade blank with the saw blade substrate 1, sintering is carried out in a protective atmosphere (hydrogen) at a temperature of 780-800℃ for 60-90 minutes to ensure that the blade 2 and the saw blade substrate 1 are firmly bonded. Then, the blade is cooled to room temperature in the furnace to obtain the universal precision slice.

[0034] The work process is as follows:

[0035] During cutting, the precision cutting blade rotates at high speed. The serrated protrusions 323 on the outer edge of the blade head 2 initially contact the workpiece surface in a point-to-point manner, generating significant local pressure and rapidly cutting into the material. Once the cutting reaches a stable stage, the groove structures 3 on both sides of the blade head reduce the contact area with the side walls of the kerf, lowering frictional resistance. Simultaneously, external air is drawn into the cutting area along the grooves, carrying away heat and dissipating it through the edge tooth grooves 324, achieving efficient air cooling. Cutting debris enters the tooth grooves 324 and is flung out of the kerf under centrifugal force and airflow, preventing accumulation. The herringbone-shaped reinforcing ribs 321 and the large-character reinforcing ribs 322 provide sufficient support for the blade head 2, preventing tooth breakage or cracking under high-impact conditions.

[0036] This invention, through the design of the aforementioned groove structure 3, reinforcing part 32, and serrated edge, significantly improves the heat dissipation capacity, chip removal performance, cutting ability, and structural strength of the precision cutting tool without changing the overall shape of the cutting head, extending its service life and improving the operating feel. It can also be used to cut materials such as ceramic tiles, slabs, artificial quartz stone, marble, and granite.

[0037] The following two embodiments will further illustrate the universal precision slicer of this utility model.

[0038] Example 1

[0039] Please see Figure 1 and 2 As shown, this example provides a universal precision saw blade, including a saw blade substrate 1 and a cutting head 2 attached to the outer edge of the saw blade substrate 1. The saw blade substrate 1 is a circular thin steel plate with an outer diameter of 105 mm, an inner diameter of 20 mm, and a thickness of 1.2 mm. The cutting head 2 is continuously arranged along the circumference of the outer edge of the substrate, and the cutting head thickness is 1.8 mm. It is formed by sintering a metal matrix and diamond particles using powder metallurgy. Grooves 3 are formed on both sides of the cutting head 2. The groove structure 3 includes multiple regularly spaced recesses 31 distributed equidistantly along the circumferential direction. Each regularly spaced recess 31 contains a reinforcing part 32, which consists of a herringbone-shaped reinforcing rib 321 and a large-character-shaped reinforcing rib 322. The herringbone-shaped reinforcing rib 321 is close to the outer edge of the cutting head, and the large-character-shaped reinforcing rib 322 is located inside the herringbone-shaped reinforcing rib. The two are distributed sequentially along the radial direction of the cutting head. The groove structures 3 on both sides of the cutting head are staggered. Please refer to [link to relevant documentation]. Figure 3 As shown, when viewed from the thickness direction, due to the misalignment of the grooves on both sides, the edge contour of the cutter head exhibits a serrated structure, consisting of multiple continuously distributed protrusions 323 and grooves 324. The recesses of the groove structure 3 and the edge grooves 324 are interconnected, forming a continuous airflow channel from the cutter head surface to the edge.

[0040] Actual cutting tests showed that the precision blade achieved a cutting speed of 2.0 m / min when cutting 10 mm thick glazed ceramic tiles, and could cut continuously for 15 meters without sparking. When cutting 18 mm thick natural granite, the cutting speed reached 1.4 m / min, and it could cut continuously for 4 meters without sparking. No broken or cracked teeth were observed on the blade.

[0041] Example 2

[0042] This example provides a conventional precision saw blade with the same saw blade base size and blade material as in Example 1. The difference between this example and Example 1 is that the two sides of the blade 2 are smooth planes without grooves, reinforcements, or serrated edges, i.e., a conventional planar blade structure.

[0043] Under the same cutting test, when cutting 10mm thick glazed ceramic tiles, the cutting speed of the flat blade was 1.5m / min, and slight sparking occurred after cutting 8 meters continuously; when cutting 18mm thick natural granite, the cutting speed was 0.9m / min, and sparking occurred after cutting 2 meters continuously. The heat dissipation was poor and the resistance was high, and the performance was significantly lower than that of Example 1.

[0044] As can be seen from the comparison, in Example 1, through the coordinated design of the groove structure 3, the reinforcing part 32 and the serrated edge, the cutting speed and continuous cutting distance are significantly improved, and the heat dissipation capacity and structural strength are significantly better than those of the planar cutter head.

[0045] 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 universal precision saw blade for dry cutting various hard and brittle materials, comprising a saw blade base and a cutting head attached to the outer edge of the saw blade base, characterized in that: Both sides of the cutter head are provided with groove structures, the groove structures include multiple regularly spaced pits distributed equidistantly along the circumferential direction, and each regularly spaced pit is provided with a reinforcing part to enhance the strength of the cutter head; the cutter head has a serrated edge profile along the thickness direction, the serrated structure is composed of multiple continuously distributed protrusions and grooves; the reinforcing part includes a herringbone-shaped reinforcing rib and a large-character-shaped reinforcing rib, the herringbone-shaped reinforcing rib and the large-character-shaped reinforcing rib are distributed sequentially along the radial direction of the cutter head.

2. The universal precision slicing tool for dry-cutting various hard and brittle materials according to claim 1, characterized in that: The groove structures on both sides of the cutter head are arranged in a staggered manner, so that the convex teeth and grooves of the serrated structure are alternately distributed along the thickness direction.

3. The universal precision slicer for dry-cutting various hard and brittle materials according to claim 1, characterized in that: The groove structure and the tooth groove of the sawtooth structure are interconnected, forming a connected airflow channel.

4. The universal precision slicer for dry-cutting various hard and brittle materials according to claim 1, characterized in that: The cutting head is composed of a matrix and diamond particles, and the groove structure and serrated structure are formed on the surface of the matrix.

5. The universal precision slicer for dry-cutting various hard and brittle materials according to claim 1, characterized in that: The saw blade substrate is a circular thin sheet, and the cutting head is continuously or segmented along the outer edge of the saw blade substrate.

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