Whole-ring type tool bit and circular saw blade
The integrated ring-shaped cutter head design solves the problems of impact between the cutter head and the workpiece and dust accumulation during the cutting process, achieving a more stable and efficient cutting effect.
Patent Information
- Application Number
- CN202422625439.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-29
AI Technical Summary
During the cutting process, the impact between the blade and the workpiece causes the workpiece to break and chip, affecting cutting stability and efficiency. In addition, the accumulation of dust reduces the sharpness of the saw blade.
The cutter head adopts a ring-shaped design with no chip outlet on the outer edge, forming continuous cutting. The inner edge is equipped with a first chip outlet for timely chip removal. Combined with the noise reduction holes and second chip outlet on the base, the stress and dust handling during the cutting process are optimized.
It improves cutting stability and efficiency, reduces blade wear and noise, avoids breakage and chipping of the cut parts and accumulation of dust, and maintains the sharpness of the blade.
Smart Images
Figure CN223544244U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cutting technology, and in particular to a ring-shaped cutter head and a circular saw blade. Background Technology
[0002] A circular saw blade is a commonly used cutting tool, mainly composed of a disc-shaped base and a cutting head that engages with the outer periphery of the base. Circular saw blades are typically made of materials such as superhard alloys and sintered diamond. In use, the circular saw blade is fixed to an infrared automatic bridge cutting machine, and the machine's bearings rotate it at high speed, driving the circular saw blade to cut the workpiece. During cutting, the outer edge (cutting edge) of the high-speed rotating cutting head extends into the workpiece to cut it. A large amount of dust and heat are generated during the cutting process. Cooling water washes away the surface dust and heat from the cutting head. Therefore, the working process of a circular saw blade involves the simultaneous wear of the cutting head and the workpiece. Especially when cutting marble slabs, which are typically soft, brittle, and easily broken during cutting, the performance stability of the circular saw blade is crucial.
[0003] Referring to the authorized publication number CN214815394U, a hot-pressed sintered circular saw blade is disclosed, comprising a circular saw blade base and saw teeth. Multiple saw teeth are provided on the outer edge of the circular saw blade base, and the circular saw blade base is fixedly connected to each saw tooth. The multiple saw teeth are arranged counterclockwise in an orderly manner on the outer edge of the circular saw blade base. This technical solution's circular saw blade has several saw teeth. A chip removal port is provided between the saw teeth and the saw teeth. In actual cutting, factors such as inconsistent chip removal ports, inconsistent saw tooth thickness, and slight offset of the saw tooth rotation position can increase the impact between the saw teeth and the workpiece being cut, leading to breakage and chipping of the workpiece (such as marble slabs), affecting cutting stability. Simultaneously, the large amount of dust and heat generated during cutting accumulates on the surface of the saw teeth, reducing the sharpness of the saw blade and thus affecting cutting efficiency. Furthermore, the friction and impact between the saw teeth and the workpiece generates significant noise, greatly reducing the user experience of the saw blade. Utility Model Content
[0004] Therefore, it is necessary to provide a ring-shaped cutter head to solve the problem of impact between the existing cutter head and the workpiece, which causes the workpiece to break and chip, affecting the stability of the cutting.
[0005] To achieve the above objectives, this utility model provides a ring-shaped cutter head. The cutter head is ring-shaped. The inner edge of the cutter head is provided with a plurality of first chip discharge ports that penetrate the cutter head. The first chip discharge ports are recessed from the inner edge of the cutter head toward the outer edge of the cutter head. The outer edge of the cutter head has a cutting edge.
[0006] Furthermore, the outer edges of the two end faces of the cutter head extend toward the central section in the thickness direction of the cutter head to form transition surfaces; and the two transition surfaces form cutting edges at the central section in the thickness direction of the cutter head.
[0007] Furthermore, the two transition surfaces are symmetrical about the central section in the thickness direction of the cutter head.
[0008] Furthermore, both transition surfaces include a first transition surface and a second transition surface; in the same transition surface, the inner edge of the first transition surface is connected to the corresponding end face of the cutter head, and the outer edge is connected to the second transition surface; the second transition surface of the two transition surfaces forms a cutting edge at the central section in the thickness direction of the cutter head.
[0009] Furthermore, the cutting head includes an inner tire carcass sheet and outer tire carcass sheets located on both sides of the inner tire carcass sheet; each tire carcass sheet is annular; the inner diameter of the inner tire carcass sheet is equal to the inner diameter of the outer tire carcass sheet, and the outer diameter of the inner tire carcass sheet is larger than the outer diameter of the outer tire carcass sheet; the inner tire carcass sheet and the outer tire carcass sheet are stacked corresponding to their inner diameters, so that the outer edge of the inner tire carcass sheet is outside the outer edge of the outer tire carcass sheet to form a cutting edge.
[0010] A circular saw blade, employing the aforementioned ring-shaped cutter head, comprises a base and a cutter head. The base is disc-shaped with a central shaft hole; the inner edge of the cutter head is connected to the outer edge of the base.
[0011] Furthermore, the substrate has several sound-absorbing holes penetrating the substrate on the outer periphery of the shaft hole, and the sound-absorbing holes are spirally distributed along the shaft hole.
[0012] Furthermore, the silencing hole is crescent-shaped.
[0013] Furthermore, the outer edge of the substrate is provided with a plurality of second chip discharge ports that penetrate the substrate.
[0014] Furthermore, the substrate and the cutting head are integrally formed.
[0015] Unlike existing technologies, the above-mentioned technical solution adopts an integrated annular cutter head, without a chip removal port at the outer edge of the cutter head. This allows the cutter head to continuously cut the workpiece, reducing fluctuations in the force exerted by the cutter head on the workpiece, resulting in a smoother cutting process. It also reduces wear and impact damage to the cutter head, improving cutting stability. Simultaneously, a first chip removal port is provided on the inner edge of the cutter head, allowing the large amount of dust generated during cutting to be promptly flushed away, reducing dust accumulation at the cutter head end and preventing blockages and jamming. This maintains the sharpness of the cutter head's edge, thereby preserving cutting efficiency. By rationally designing the layout of the chip removal port and the cutter head, the stress on the workpiece during cutting is optimized, avoiding intermittent impacts between the cutter head and the workpiece, thus preventing breakage and chipping of the cut piece. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the ring-shaped cutter head described in the embodiment;
[0017] Figure 2 This is a side view of the ring-shaped cutter head described in the embodiment;
[0018] Figure 3 This is a schematic diagram of the structure of the ring-shaped cutter head described in the embodiment;
[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0020] Figure 5 This is a schematic diagram of the circular saw blade described in the embodiment;
[0021] Explanation of reference numerals in the attached figures:
[0022] 10. Blade tip;
[0023] 101. One end face of the cutter head; 102. The other end face of the cutter head; 103. First chip removal opening; 104. Transition surface; 105. Inner layer carcass sheet; 106. Outer layer carcass sheet; 107. Cutting edge;
[0024] 20. Matrix;
[0025] 201, Shaft hole; 202, Silencing hole; 203, Second chip discharge port;
[0026] a. Center section in the thickness direction of the cutter head. Detailed Implementation
[0027] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.
[0028] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0029] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0030] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0031] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.
[0032] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0033] Similar to the interpretation in the Patent Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also interpreted in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0034] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0035] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0036] See Figures 1-4 As shown, this utility model provides a one-piece ring-shaped cutter head 10. The cutter head 10 has no chip discharge port at the blade 107 on its outer edge, allowing the blade 107 to continuously cut the workpiece, reducing fluctuations in the force exerted by the blade 107 on the workpiece, resulting in a smoother cutting process. This also reduces wear and impact damage to the blade 107, improving cutting stability. Simultaneously, a first chip discharge port 103 is provided on the inner edge of the cutter head 10, allowing a large amount of dust generated during cutting to be promptly flushed away, reducing dust accumulation at the end of the cutter head 10 and preventing blockages and jamming. This maintains the sharpness of the blade 107, thus preserving the cutting efficiency of the cutter head 10. By rationally designing the layout of the chip discharge port and the blade 107, the force exerted by the cutter head 10 on the workpiece during cutting is optimized, avoiding intermittent impacts between the cutter head 10 and the workpiece, thereby preventing breakage and chipping of the workpiece.
[0037] The following provides an embodiment of the ring-shaped cutter head 10 of this utility model. See also Figures 1-2As shown, the cutter head 10 is annular; the inner edge of the cutter head 10 is provided with a plurality of first chip discharge ports 103 penetrating the cutter head 10, the first chip discharge ports 103 are recessed from the inner edge of the cutter head 10 toward the outer edge of the cutter head 10, and the outer edge of the cutter head 10 has a cutting edge 107.
[0038] The aforementioned first chip removal port 103 is used to promptly flush away a large amount of dust generated during the cutting process, reducing the accumulation and buildup of dust at the end of the cutter head 10. This is typically achieved through mechanical cutting, chemical etching, laser etching, or other methods. The shape and size of the first chip removal port 103 are not limited. The size of the first chip removal port 103 can be designed according to the actual size of the cutter head 10 and chip removal requirements. The shape of the first chip removal port 103 can be a regular shape (such as an arc, strip, or arch) or an irregular shape (such as a curve (set according to the rotation trajectory of the cutter head 10)). Specifically, several first chip removal ports 103 are provided circumferentially along the inner edge of a cutter head 10. These ports can be partially identical, all identical, partially different, or completely different. The following example illustrates that several first chip removal ports 103 may be partially different. In some embodiments, the depth of indentation of some of the several first chip removal ports 103 distributed circumferentially along the inner edge of the cutter head 10 varies towards the outer edge of the cutter head 10. In some embodiments, a plurality of first chip removal openings 103 are circumferentially distributed along the inner edge of the cutting head 10, with some of the first chip removal openings 103 having different circumferential widths along the outer edge of the cutting head 10. The plurality of first chip removal openings 103 along the inner edge of the cutting head 10 can be regularly or irregularly distributed. In some embodiments, the first chip removal openings 103 are evenly distributed along the inner edge of the cutting head 10, i.e., the spacing between each first chip removal opening 103 is equal, ensuring uniformity and efficiency of chip removal. In some embodiments, the inner edge of the cutting head 10 is divided into several equal or unequal segments, with one or more first chip removal openings 103 provided in each segment, which can be configured according to different requirements of the cutting area. In some embodiments, the distribution of the plurality of first chip removal openings 103 on the inner edge of the cutting head 10 is not uniform, but rather arranged according to specific cutting requirements.
[0039] The aforementioned blade 107 has a cutting function, forming a continuous cut on the workpiece. In some embodiments, the blade 107 extends from the outer edge of one end face 101 of the cutting head to the outer edge of the other end face 102 of the cutting head, and forms the blade 107 at the outer edge of the other end face 102. In some embodiments, the outer edges of the two end faces of the cutting head (one end face 101 and the other end face 102) extend towards the central section a in the thickness direction of the cutting head to form a transition surface 104; and the two transition surfaces 104 form the blade 107 at the central section a in the thickness direction of the cutting head. The aforementioned transition surface 104 allows the cutting head 10 to slide more smoothly during the cutting process, reducing jamming and friction, thereby providing a smoother cutting experience. This structure is particularly suitable for sintered diamond cutting heads 10 (sintered from matrix powder and diamond particles), which is beneficial for the early grinding and sharpening of the cutting head 10, quickly exposing the diamond, and thus improving cutting efficiency.
[0040] The aforementioned transition surface 104 can be composed of one or more surfaces. Taking multiple surfaces as an example, in figures not shown, at least one of the transition surfaces 104 includes a first transition surface and a second transition surface. That is, in some embodiments, both transition surfaces 104 include a first transition surface and a second transition surface. In the same transition surface 104, the inner edge of the first transition surface is connected to the corresponding end face of the cutter head 10, and the outer edge is connected to the second transition surface; the second transition surfaces of the two transition surfaces 104 form a cutting edge 107 at the central section a in the thickness direction of the cutter head. In some embodiments, one of the transition surfaces 104 includes a first transition surface and a second transition surface, the inner edge of the first transition surface is connected to one end face 101 of the cutter head, and the outer edge is connected to the second transition surface; the other transition surface 104 includes a first transition surface; the second transition surface of the first transition surface 104 and the first transition surface of the other transition surface 104 form a cutting edge 107 at the central section a in the thickness direction of the cutter head. It should be noted that the names of the first and second transition surfaces 104 are merely descriptions based on their connection order and do not limit their shapes. For example, the first transition surface of one transition surface 104 may have a different shape than the first transition surface of the other transition surface 104. The aforementioned first and second transition surfaces can be planes, curved surfaces (convex arc surfaces, concave arc surfaces), etc. Preferably, the two transition surfaces 104 are symmetrical about the central section a in the thickness direction of the cutting head. The symmetrical design of the transition surfaces 104 allows the cutting edge 107 to maintain better balance during cutting, reducing cutting instability caused by the shift of the center of gravity.
[0041] The blade 10 of this invention can be integrally formed or formed by connecting multiple parts. See also Figures 3-4As shown, in some embodiments, the cutting head 10 is formed by stacking at least three layers of tire carcass sheets; specifically, the cutting head 10 includes an inner tire carcass sheet 105 and outer tire carcass sheets 106 located on both sides of the inner tire carcass sheet 105, i.e., an outer tire carcass sheet 106-inner tire carcass sheet 105-outer tire carcass sheet 106 structure; each tire carcass sheet is annular; the inner diameter of the inner tire carcass sheet 105 is equal to the inner diameter of the outer tire carcass sheet 106, and the outer diameter of the inner tire carcass sheet 105 is greater than the outer diameter of the outer tire carcass sheet 106 (the length from the outer edge of the inner tire carcass sheet 105 to the inner and outer edges is greater than that of the outer tire carcass sheet 106); the inner tire carcass sheet 105 and the outer tire carcass sheet 106 are stacked according to their inner and outer diameters, so that the outer edge of the inner tire carcass sheet 105 is outside the outer edge of the outer tire carcass sheet 106 to form the cutting edge 107.
[0042] The cutting head 10 includes an inner tire body sheet 105 and outer tire body sheets 106 located on both sides of the inner tire body sheet 105; each tire body sheet is annular; the inner diameter of the inner tire body sheet 105 is equal to the inner diameter of the outer tire body sheet 106, and the outer diameter of the inner tire body sheet 105 is larger than the outer diameter of the outer tire body sheet 106; the inner tire body sheet 105 and the outer tire body sheet 106 are stacked according to their inner diameters, so that the outer edge of the inner tire body sheet 105 is outside the outer edge of the outer tire body sheet 106 to form a cutting edge 107.
[0043] The cutting head 10 is typically formed from superhard alloy, sintered diamond, or other materials. Taking sintered diamond as an example, each matrix sheet is formed by sintering matrix powder and diamond particles. The wear of the matrix powder in the inner matrix sheet 105 is less than that in the outer matrix sheet 106. During cutting, the wear of the matrix powder in the outer matrix sheet is made greater than that in the inner matrix sheet to maintain the shape of the cutting edge 107, so that cutting can proceed normally.
[0044] See Figure 5 As shown, this utility model also provides a circular saw blade. The aforementioned ring-shaped cutter head 10 includes a base 20 and a cutter head 10. The base 20 is disc-shaped and has a shaft hole 201 in its middle. The inner edge of the cutter head 10 is connected to the outer edge of the base 20.
[0045] The circular saw blade rotates and cuts the workpiece through the shaft hole 201. During the cutting operation, the base 20 rotates at high speed through the shaft hole 201, which in turn causes the cutter head 10 connected to the base 20 to rotate at high speed. The cutting edge 107 (cutting edge) of the high-speed rotating cutter head 10 extends into the workpiece to cut it. The above connection is between the base 20 and the cutter head 10. It can be a direct connection where the base 20 and the cutter head 10 are integrally formed, or the base 20 and the cutter head 10 can be formed separately and connected by a joint. The joint is where the inner edge of the cutter head 10 joins the outer edge of the base 20, so that the cutter head 10 can rotate together with the base 20. That is, the cutter head 10 rotates through the shaft hole 201 of the base 20 to cut the workpiece. The joint between the inner edge of the cutter head 10 and the outer edge of the base 20 can be achieved by welding or other strong connection methods. In the connection between the cutter head 10 and the base 20, it is preferable that the center section a in the thickness direction of the cutter head and the center section in the thickness direction of the base 20 are on the same horizontal plane. This ensures that the circular saw blade remains stable during high-speed rotation, reducing noise and wear caused by imbalance. Based on this, the thickness of the cutter head 10 can differ from the thickness of the base 20. In some embodiments, the thickness of the cutter head 10 is greater than the thickness of the base 20, in which case the two surfaces of the cutter head 10 can be higher than the two surfaces of the base 20; in some embodiments, the thickness of the cutter head 10 is less than the thickness of the base 20, in which case the two surfaces of the cutter head 10 can be lower than the two surfaces of the base 20; in some embodiments, the thickness of the cutter head 10 is equal to the thickness of the base 20, in which case the two surfaces of the cutter head 10 are flush with the two surfaces of the base 20. This helps reduce vibration and sway caused by inconsistent thickness, thereby improving the overall stability of the saw blade and ensuring cutting accuracy and efficiency.
[0046] Further improvements to the circular saw blade include the addition of several sound-absorbing holes 202 penetrating the base 20 around the shaft hole 201. These sound-absorbing holes 202 effectively absorb and disperse vibrations and noise generated during operation, thereby reducing noise propagation intensity. Adjusting the number, size, and distribution of the sound-absorbing holes 202 further optimizes noise reduction, making the saw blade quieter during operation. Simultaneously, the sound-absorbing holes 202 also improve chip removal and cooling. During high-speed rotation and material cutting, the sound-absorbing holes 202 serve as chip removal and heat dissipation channels, promptly flushing away large amounts of dust generated during cutting and helping the saw blade dissipate heat more quickly.
[0047] The aforementioned silencing holes 202 can be of regular shape, such as circular, elliptical, arc-shaped, strip-shaped, arched, crescent-shaped, etc.; silencing holes 202 can also be of irregular shape, such as curved, etc. The number and distribution of silencing holes 202 can be adjusted according to the size of the saw blade and the expected noise reduction effect. The silencing holes 202 can be radially distributed along the outer periphery of the shaft hole 201, or spirally distributed along the circumference of the shaft hole 201. Spiral distribution can provide a wider noise reduction frequency range, with better suppression effect on noise of multiple frequencies, while reducing stress and fatigue damage to the saw blade during operation.
[0048] To further enhance chip removal capability, a plurality of second chip removal openings 203 penetrating the outer edge of the substrate 20 can be provided circumferentially. The second chip removal openings 203 can be recessed along the outer edge of the substrate 20 towards the shaft hole 201. Similarly, the aforementioned second chip removal openings 203 are used to promptly flush away a large amount of dust generated during the cutting process, reducing the accumulation and buildup of dust at the end of the cutter head 10. This can typically be achieved through mechanical cutting, chemical etching, laser etching, etc. The shape and size of the second chip removal openings 203 are not limited. The size of the second chip removal openings 203 can be designed according to the actual size of the cutter head 10, chip removal requirements, etc. The shape of the second chip removal openings 203 can be a regular shape (such as an arc, strip, arch, etc.) or an irregular shape (such as a curve (set according to the rotation trajectory of the cutter head 10), etc.). Specifically, the plurality of second chip removal openings 203 can be partially identical, all identical, partially different, or completely different. The following examples illustrate the different depths of the second chip removal ports 203. In some embodiments, the depths of the recesses of some of the second chip removal ports 203 circumferentially distributed along the outer edge of the substrate 20 differ. In some embodiments, the circumferential widths of some of the second chip removal ports 203 circumferentially distributed along the outer edge of the substrate 20 differ. The second chip removal ports 203 circumferentially distributed along the outer edge of the substrate 20 can be regularly or irregularly distributed. In some embodiments, the second chip removal ports 203 are evenly distributed along the circumferential direction of the outer edge of the substrate 20, meaning the spacing between each second chip removal port 203 is equal, ensuring uniformity and efficiency of chip removal. In some embodiments, the outer edge of the substrate 20 is divided into several equal or unequal segments, and one or more second chip removal ports 203 are provided in each segment, which can be configured according to different requirements of the cutting area. In some embodiments, the distribution of the plurality of second chip removal ports 203 on the outer edge of the substrate 20 is not uniform, but is arranged according to specific cutting requirements. The aforementioned second chip removal ports 203 may be correspondingly arranged with the first chip removal port 103, and the second chip removal ports 203 and the first chip removal port 103 may be staggered.
[0049] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.
Claims
1. A ring-shaped cutting head, characterized in that, The cutter head is annular; the inner edge of the cutter head is provided with a plurality of first chip discharge ports that penetrate the cutter head, the first chip discharge ports are recessed from the inner edge of the cutter head toward the outer edge of the cutter head, and the outer edge of the cutter head has a cutting edge; The outer edges of the two end faces of the cutter head extend toward the central section in the thickness direction of the cutter head to form transition surfaces; and the two transition surfaces form cutting edges at the central section in the thickness direction of the cutter head. The two transition surfaces are symmetrical about the central section of the cutter head in the thickness direction; Both transition surfaces include a first transition surface and a second transition surface; in the same transition surface, the inner edge of the first transition surface is connected to the corresponding end face of the cutter head, and the outer edge is connected to the second transition surface; the second transition surface of the two transition surfaces forms a cutting edge at the central section in the thickness direction of the cutter head.
2. The ring-shaped cutter head according to claim 1, characterized in that, The cutting head includes an inner tire carcass sheet and outer tire carcass sheets located on both sides of the inner tire carcass sheet; each tire carcass sheet is annular; the inner diameter of the inner tire carcass sheet is equal to the inner diameter of the outer tire carcass sheet, and the outer diameter of the inner tire carcass sheet is larger than the outer diameter of the outer tire carcass sheet; the inner and outer tire carcass sheets are stacked corresponding to their inner diameters, so that the outer edge of the inner tire carcass sheet is outside the outer edge of the outer tire carcass sheet to form a cutting edge.
3. A circular saw blade, employing the ring-shaped cutter head as described in any one of claims 1-2, characterized in that, It includes a base and a cutting head. The base is disc-shaped with a shaft hole in its center. The inner edge of the cutting head is connected to the outer edge of the base.
4. The circular saw blade according to claim 3, characterized in that, The substrate has several sound-absorbing holes that penetrate the substrate on the outer periphery of the shaft hole, and the sound-absorbing holes are spirally distributed along the shaft hole.
5. The circular saw blade according to claim 4, characterized in that, The sound-absorbing hole is crescent-shaped.
6. The circular saw blade according to claim 5, characterized in that, The outer edge of the substrate is provided with several second chip removal ports that penetrate the substrate.
7. The circular saw blade according to claim 6, characterized in that, The substrate and the cutting head are integrally formed.