Circular saw blade with rounded corners
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- DONGGU SAW IND (SHANDONG) CO LTD
- Filing Date
- 2026-04-17
- Publication Date
- 2026-06-15
Smart Images
Figure 0003256239000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of circular saw blades, and particularly to circular saw blades having corner R chips.
Background Art
[0002] A circular saw blade, also called a rotary saw blade or a disk saw blade, is an important tool widely used for cutting metal materials. It has an efficient design and is suitable for various metal cutting scenarios, including the processing of steel, aluminum, and other alloy materials. Especially when used in combination with power tools, the circular saw blade needs to have excellent cutting performance to ensure cutting efficiency and low cutting resistance during high-speed operation, thereby improving work efficiency and reducing energy consumption. In addition, its structural design also needs to emphasize durability and safety to meet the high-strength requirements in industrial use.
[0003] Due to the limitation of the blade structure, conventional circular saw blades are prone to generating large resistance during cutting, increasing power consumption. At the same time, conventional circular saw blades are often used for cold saw cutting of metals, with a low cutting rotational speed. However, the circular saw blades used in power tools have a high cutting rotational speed, and resonance of the saw blade is prone to occur during high-speed rotation. The chip is prone to lateral displacement under the influence of vibration, resulting in a non-linear cutting path, affecting cutting accuracy. Moreover, the high cutting rotational speed concentrates heat on the cutting edge, reducing the wear resistance of the chip and shortening the service life of the circular saw blade.
Summary of the Invention
[0004] Therefore, the present invention provides a circular saw blade having a corner R chip to solve the problems in the prior art, such as low cutting accuracy and short service life of the circular saw blade in the use of high-speed cutting power tools.
[0005] To achieve the above objective, the present invention provides a circular saw blade having a corner radius tip, the circular saw blade including a saw blade body, a plurality of chip discharge grooves provided in the circumferential direction of the saw blade body, a tooth slot provided on one side of the chip discharge groove, and a corner radius tip welded within the tooth slot. The front end of the corner radius chip is a corner radius rake face, and the corner radius rake face includes, from top to bottom, a cutting surface, a first chip removal surface, a second chip removal surface, a third chip removal surface, a guide surface, and a connecting surface. The corner radius tip includes a first tip and a second tip, the first tip and the second tip having different cutting edges, and the first tip and the second tip are arranged alternately within the circumferential tooth slots of the saw blade body.
[0006] Furthermore, in the corner R rake face, the tilt angle of the cutting surface is 2°, the tilt angle of the first chip discharge surface is 10°, the second chip discharge surface is a curved surface, the angle between the third chip discharge surface and the first chip discharge surface is 137°, the tilt angle of the guide surface is minus 8°, and the connecting surface is smoothly connected to the curved surface at the bottom of the chip discharge groove.
[0007] Furthermore, the saw blade body has multiple sound-dampening slits, which are multi-stage arc-shaped grooves with diameters that change at equal pitches, exhibiting an S-shaped curve, and filled with high-damping silicone rubber.
[0008] Furthermore, the sound-dampening slit has a starting point and an ending point, and the angle between the positions of the starting point and the ending point is 20°.
[0009] Furthermore, a support is installed at the rear end of the tooth slot, and a support slope is installed on the top surface of the support, with a support slope angle of 170.8°.
[0010] Furthermore, the aforementioned corner-radius tip is provided with a tip top surface tilt angle, and the tip top surface tilt angle is 6°. Here, the tip top surface tilt angle is the angle between the top surface of the corner radius tip and the tangent to the circumference where the cutting edge is located.
[0011] Furthermore, the corner-radius tip has a trapezoidal structure in its planar projection plane, the width of the rear end face of the corner-radius tip is smaller than the width of the front end face of the corner-radius tip, and the width of the rear end face of the corner-radius tip is larger than the thickness of the saw blade body.
[0012] Furthermore, when the first tip is a flat blade tip, the second tip is a trapezoidal blade tip, and symmetrical inclined surfaces are provided on both sides of the top of the second tip, with an inclination angle of 30° between the symmetrical inclined surfaces.
[0013] Furthermore, the radial height of the second chip is greater than the radial height of the first chip.
[0014] Furthermore, when the first tip is a right-hand single-edged tip, the second tip is a left-hand single-edged tip, with an inclined surface on the left side of the top of the first tip, with an inclination angle of 30°, and an inclined surface on the right side of the top of the second tip, with an inclination angle of 30°.
[0015] Compared to conventional technology, the beneficial effects of this invention are as follows: By designing the corner radius rake face of the corner radius tip, the Coanda effect is generated in the corner radius tip, significantly increasing the velocity of the airflow through the corner radius tip and lowering the temperature of the cutting edge, thereby extending the service life of the tip. At the same time, the cutting chips within the corner radius tip can be discharged by forming a vortex, improving the speed of chip discharge. By using a design in which the first tip and the second tip are arranged alternately, cutting resistance can be effectively reduced, and vibration of the saw blade edge can be reduced. Through a synergistic effect with the high-damping silicone rubber sound-dampening slit processed with a silicone filling process, the transmission of vibration of the saw blade edge to the central region is effectively blocked, reducing the cutting noise of the circular saw blade. Furthermore, the high-damping silicone rubber sound-dampening slit absorbs the energy of the vibration of the saw blade edge, reducing the vibration of the saw blade edge and improving the cutting accuracy of circular saw cutting. [Brief explanation of the drawing]
[0016] [Figure 1] This is a schematic diagram of the saw blade body structure in Example 1. [Figure 2] This is a schematic diagram of the tooth slot structure of the saw blade body in Example 1. [Figure 3] This is a schematic diagram of the connection structure between the saw blade body and the corner radius tip in Example 1. [Figure 4] This is a schematic diagram of the side structure of the corner radius chip in Example 1. [Figure 5] This is a schematic diagram of the planar structure of the connection between the saw blade body and the corner radius tip in Example 1. [Figure 6] This is a schematic front view of the first chip in Example 1. [Figure 7] This is a schematic front view of the second chip in Example 1. [Figure 8] This is a schematic diagram of the saw blade body structure in Example 2. [Figure 9] This is a schematic diagram of the tooth slot structure of the saw blade body in Example 2. [Figure 10] It is a schematic structural diagram of the connection between the saw blade body and the chip with a corner R in Example 2. [Figure 11] It is a schematic plan view of the connection between the saw blade body and the chip with a corner R in Example 2. [Figure 12] It is a schematic front view of the first chip in Example 2. [Figure 13] It is a schematic front view of the second chip in Example 2.
Embodiments for Carrying Out the Invention
[0017] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments. It should be understood that the specific embodiments described here are only for interpreting the present invention and not for limiting the present invention.
[0018] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. As can be understood by those skilled in the art, these embodiments are only for interpreting the technical principle of the present invention and not for limiting the protection scope of the present invention.
[0019] In the description of the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of explanation and does not indicate or imply that the said device or element must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present invention.
[0020] Furthermore, in the description of this invention, unless otherwise specifically defined or limited, terms such as "attachment," "connection," and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between the two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in this invention depending on the specific situation.
[0021] Referring to Figures 1 to 7 of Example 1, this embodiment provides a circular saw blade having a corner radius tip, the specifications of the circular saw blade being 355 × 2.1 × 1.8 × 25.4 × 66T, and the figures include the saw blade body 1, central hole 2, chip evacuation groove 3, sound-dampening slit 4, start point 401, end point 402, tooth slot 5, support 6, corner radius tip 7, first tip 701, second tip 702, corner radius rake face 8, cutting surface 801, first chip evacuation surface 802, second chip evacuation surface 803, third chip evacuation surface 804, guide surface 805, connecting surface 806, and tip top surface 9. As shown in Figure 1, in this embodiment, the circular saw blade having a corner radius tip includes a saw blade body 1, the saw blade body 1 is a circular sheet of metal material, the thickness L6 of the saw blade body 1 is 1.8 mm, the outer diameter L1 of the saw blade body 1 is 354.2 mm, a central hole 2 is installed in the center of the saw blade body 1, the diameter L2 of the central hole 2 is 25.4 mm, and 66 chip discharge grooves 3 are installed on the outer circumference of the saw blade body 1. In Embodiment 1, the saw blade body 1 is further provided with five sets of sound-dampening slits 4. The starting point 401 of the sound-dampening slit 4 is 100 mm from the center of the saw blade body 1, and the ending point 402 is 125 mm from the center of the saw blade body 1. The sound-dampening slits 4 are multi-stage arc-shaped grooves with diameters that change at equal pitches, exhibiting an overall S-shaped curve with a width of 0.28 mm. The radii of curvature from the starting point 401 to the ending point 402 of the sound-dampening slit 4 are R1, R2, R3, R4, R5, and R6, respectively. In this embodiment, R1 is 5.1 mm, R2 is 27 mm, R3 is 7.6 mm, R4 is 11.6 mm, R5 is 29 mm, and R6 is 6.6 mm. The angle C1 between the starting point 401 and the ending point 402 of the sound-dampening slit 4 is 20°, and the phase difference between the five sets of sound-dampening slits 4 is 72°. The sound-absorbing slit 4 is filled with high-damping silicone rubber using a silicone rubber filling process, and the loss coefficient tanδ = 0.85.
[0022] [Table 1]
[0023] As can be seen from Table 1, saw blades with sound-dampening slits 4 and treated with a silicon filling process show a significant reduction in both idling noise and cutting noise, as well as a significant improvement in fatigue life.
[0024] When the saw blade rotates, the amplitude of vibrations generated at the saw blade edge is greater than that at the center of the saw blade, and the vibrations are transmitted inward, generating noise. By opening a sound-dampening slit 4 on the inside of the edge of the saw blade body 1, the transmission of vibrations can be effectively blocked. At the same time, the high-damping silicone rubber filled in the sound-dampening slit 4 absorbs the vibrations on the edge side of the saw blade body 1, thereby reducing the vibration of the edge of the saw blade body 1. The starting point 401 of the installed sound-dampening slit 4 is 100 mm from the center of the saw blade body 1, and the ending point 402 is 125 mm from the center of the saw blade body 1. By bringing the starting point 401 and ending point 402 of the sound-dampening slit 4 close together and connecting them with an S-shaped curve, it is possible to ensure that the length of the sound-dampening slit 4 is sufficient, and the covering area of the sound-dampening slit 4 is reduced, thus avoiding the problem of the covering area of the sound-dampening slit 4 being too large and affecting the overall structural strength of the saw blade body 1.
[0025] As shown in Figure 2, a chip discharge groove 3 is installed on the saw blade body 1, the bottom of the chip discharge groove 3 has a curved surface structure, the radius of curvature R7 of the curved surface structure is 2.9 mm, a tooth slot 5 is installed correspondingly on one side of the chip discharge groove 3, a support 6 is installed at the rear end of the tooth slot 5, the support 6 is part of the saw blade body 1, and the support 6 can stably support the corner R-shaped tip 7 welded into the tooth slot 5, in this embodiment, the length L3 of the rear end face of the tooth slot 5 is 3.8 mm, the length L4 of the lower end face of the tooth slot 5 is 2.4 mm, the length L5 of the support 6 is 9.9 mm, a support slope is installed on the top surface of the support 6, the support slope angle C2 of the support slope is 170.8°, the angle C3 between the rear end face of the tooth slot 5 and the support slope is 77.2°, and the angle C4 between the rear end face of the tooth slot 5 and the radial direction of the saw blade body 1 is 2°. In this embodiment, by installing a support slope on the support body 6 and providing a support force in the opposite direction to the corner radius chip 7, the structural rigidity of the corner radius chip 7 is improved. For every 1° decrease in the support slope angle C2, the corresponding structural rigidity of the corner radius chip 7 improves by approximately 8%, but the waste discharge space also decreases by approximately 5%. In this embodiment, by selecting a support slope angle C2 of 170.8°, the structural rigidity of the corner radius chip 7 is improved by 23% compared to a support body 6 without a support slope, and the waste discharge efficiency is maintained at 92%. This ensures a certain level of structural rigidity for the corner radius chip 7 and reduces the loss of waste discharge efficiency.
[0026] As shown in Figure 3, the corner radius tip 7 is welded into the circumferential tooth slot 5 of the saw blade body 1. The angle between the top surface of the corner radius tip 7 and the tangent to the circumference where the cutting edge is located is the tip top surface tilt angle C5. In this embodiment, the tip top surface tilt angle C5 is 6°. The rake face of the corner radius tip 7 is the corner radius rake face 8. The corner radius tip 7 is made of cermet material, and the chip curl radius can be controlled by adjusting the tip top surface tilt angle C5. When the tip top surface tilt angle C5 is 6°, the chip curl radius is 0.8 mm. Compared to a tip with a flat top surface, the chip length is reduced from 15 mm to 8 mm, and the clogging rate is reduced from 12% to 2%.
[0027] In this embodiment, the corner radius chip 7 is divided into two types, including a first chip 701 and a second chip 702. The two types of chips, the first chip 701 and the second chip 702, are alternately distributed in the circumferential direction of the saw blade body 1. The rake faces of both the first chip 701 and the second chip 702 are corner radius rake faces 8. The radial height of the second chip 702 is greater than the radial height of the first chip 701, and the difference in radial height between the first chip 701 and the second chip 702 is 0.23 mm. This realizes a structure with heights varying at equal pitches, forming a segmented cut. The heights of each first chip 701 on the saw blade body 1 are kept equal to ensure that the highest points contact the workpiece simultaneously. Similarly, the heights of each second chip 702 are also kept equal.
[0028] As shown in Figure 4, the top end of the corner radius chip 7 is the chip top surface 9, and the front end of the corner radius chip 7 is the corner radius rake face 8, which, from top to bottom, includes the cutting surface 801, the first chip removal surface 802, the second chip removal surface 803, the third chip removal surface 804, the guide surface 805 and the connecting surface 806, where the tilt angle of the cutting surface 801 is 2°, and the first chip removal surface 802 is The tilt angle is 10°, the second chip discharge surface 803 is a curved surface with a radius of curvature of 0.7 mm, the angle between the third chip discharge surface 804 and the first chip discharge surface 802 is 137°, the tilt angle of the guide surface 805 is -8°, the connecting surface 806 is smoothly connected to the curved surface at the bottom of the chip discharge groove 3, and the tilt angles of each surface of the corner R rake face 8 are all angles made with respect to the radial direction in which the cutting edge is located. By setting a 137° angle between the third chip discharge surface 804 and the first chip discharge surface 802, and combining this with the -8° tilt angle of the guide surface 805, the Coanda effect is generated in CFD simulations. The velocity of the airflow over the corner radius chip 7 increases from 5 m / s to 12 m / s, the cutting edge temperature decreases from 180°C to 95°C, and the chip life can be extended by 35%. Furthermore, the cutting chips can be discharged in a vortex, increasing the chip discharge speed by 40%. The -8° design of the guide surface 805 in this embodiment changes the direction of chip discharge, enabling rapid cooling. It is optimized in conjunction with each angle, and adjusting a single angle disrupts the system balance and affects airflow adhesion, but the combination of angles in this embodiment is a globally optimal solution.
[0029] As shown in Figure 5, the corner-rounded tip 7 has a trapezoidal structure in its planar projection plane, the width L7 of the rear end face of the corner-rounded tip 7 is 2.04 mm, which is greater than the thickness L6 of the saw blade body 1 which is 1.8 mm, and the width L8 of the front end face of the corner-rounded tip 7 is 2.1 mm. As a result, the corner-rounded tip 7 exhibits a trapezoidal structure in its planar projection plane, and the shapes of the first tip 701 and the second tip 702 in this embodiment are the same in their planar projection planes. As shown in Figure 6, the first tip 701 is a flat-blade tip, and the first tip 701 has a trapezoidal shape in the orthographic projection plane. The width L9 of the lower end face of the first tip 701 is 2 mm, and the width of the upper end face of the first tip 701 is the same as the width of the front end face in the planar projection plane, i.e., the cutting edge width L8 of the first tip 701, both of which are 2.1 mm.
[0030] As shown in Figure 7, the second tip 702 is a trapezoidal cutting edge tip, and symmetrical inclined surfaces are provided on both sides of the apex in the orthographic projection of the second tip 702. The symmetrical inclined surfaces are the belt lines of the trapezoidal cutting edge, the inclination angle C6 of the symmetrical inclined surfaces is 30°, and the width of the upper end surface of the second tip 702 is the cutting edge width L10 of the second tip 702, which is 0.8 mm.
[0031] In summary, the circular saw blade having a corner radius tip 7 of this embodiment, through the combination of blade shapes of the first tip 701 and the second tip 702, causes the high-point second tip 702 to contact the workpiece first, cutting the central region first with the narrower blade surface. As the circular saw blade advances, the first tip 701 contacts the workpiece and cuts the regions on both sides, causing the chips to curl up and break into multiple small pieces, which are then quickly discharged along the corner radius rake face 8.
[0032] A cutting test was conducted using the circular saw blade with corner radius tip 7 of Example 1. Three sets of circular saw blade products from different production lots were selected for the cutting test, and at the same time, three sets of trapezoidal flat-blade circular saw blades from different manufacturers with similar specifications were selected for a comparative test. The test results are shown in Table 2.
[0033] [Table 2]
[0034] As can be seen from Table 2, the circular saw blade with corner radius tips in this embodiment maintains a consistent cutting time of 6 to 7 seconds for the same material under the same rotational speed conditions. Both the final lifespan (number of cuts) and wear ratio are superior to commercially available trapezoidal flat-blade saw blades. Furthermore, the material cut with the circular saw blade with corner radius tips in this embodiment has a smooth, step-free cut surface, and the overall cutting accuracy is superior to commercially available trapezoidal flat-blade saw blades.
[0035] Referring to Figures 8 to 13 of Example 2, the specifications of the circular saw blade in Example 2 are 150 × 1.1 × 0.95 × 20 × 48T, and the figures include the saw blade body 1a, central hole 2a, chip discharge groove 3a, sound-dampening slit 4a, starting point 401a, ending point 402a, tooth slot 5a, support 6a, first tip 701a, and second tip 702a. The circular saw blade with corner radius tips in Example 2 is based on Example 1, with adjustments made to the overall dimensional specifications of the saw blade, maintaining the design of the corner radius surface of the tips, changing the design of the tooth slots of the saw blade body, and adjusting the combination of tip blade shapes. As shown in Figure 8, in this embodiment, the saw blade body 1a is made of high-strength steel plate, the outer diameter L1a of the saw blade body 1a is 149.4 mm, a central hole 2a is installed in the center of the saw blade body 1a, the diameter L2a of the central hole 2a is 20 mm, and 48 chip discharge grooves 3a are installed on the outer circumference of the saw blade body 1a. In Example 1, the saw blade body 1a is further provided with four sets of sound-dampening slits 4a, the starting point 401a of the sound-dampening slits 4a being 71 mm from the center of the saw blade body 1, and the ending point 402a being 108.8 mm from the center of the saw blade body 1. The sound-dampening slits 4a are multi-stage arc-shaped grooves with diameters that change at equal pitches, exhibiting an overall meandering curve, the angle C1a between the starting point 401a and the ending point 402a of the sound-dampening slits 4a being 20°, and the phase difference between the four sets of sound-dampening slits 4a being 90°. The sound-dampening slits 4a are filled with high-damping silicone rubber using a silicone filling process. As shown in Figure 9, a chip discharge groove 3a is provided on the saw blade body 1a, the bottom of which has a curved surface structure, and the radius of curvature R7a of the curved surface structure is 1.25 mm, a tooth slot 5a is provided on one side of the chip discharge groove 3a, a support 6a is provided at the rear end of the tooth slot 5a, the support 6a is part of the saw blade body 1a and can stably support the corner R tip welded into the tooth slot 5a, a support slope is provided on the top surface of the support 6a, and in this embodiment, the length L3a of the rear end surface of the tooth slot 5a is 2. The length of the lower end face L4 of the tooth slot 5a is 14 mm, the length of the lower end face L4 is 2.25 mm, a connecting bevel is installed between the rear end face and the lower end face of the tooth slot 5a, the length La of the connecting bevel is 1.25 mm, the angle C3a between the rear end face of the tooth slot 5a and the supporting bevel is 70.1°, the angle C4a between the rear end face of the tooth slot 5a and the radial direction of the saw blade body 1a is 10°, and the angle Ca between the rear end face and the lower end face of the tooth slot 5a is 65.7°, forming a stable V-shaped angle structure, which further improves the impact resistance stability of the tip in the tooth slot 5a.
[0036] As shown in Figure 10, corner radius tips are welded to the circumferential tooth slots 5a of the saw blade body 1a. The corner radius tips in Embodiment 2 are also divided into two types, including a first tip 701a and a second tip 702a. The two types of tips, the first tip 701a and the second tip 702a, are alternately distributed in the circumferential direction of the saw blade body 1a. The rake faces of both the first tip 701a and the second tip 702a are corner radius rake faces. Based on the combination of blade types, the first tip 701a and the second tip 702a are installed so that their radial heights are the same. As shown in Figure 11, the corner-rounded tip has a trapezoidal structure in the planar projection plane, the width L7a of the rear end face of the corner-rounded tip is 1.02 mm, which is greater than the thickness L6a of the saw blade body 1 which is 0.95 mm, and the width L8a of the front end face of the corner-rounded tip is 1.1 mm. As a result, the corner-rounded tip exhibits a trapezoidal structure in the planar projection plane, and the shapes of the first tip 701a and the second tip 702a in this embodiment are the same in the planar projection plane. As shown in Figure 12, the first tip 701a is a right-hand single-edged tip, with an inclined surface on the left side of the apex in the orthographic projection of the first tip 701a, the inclination angle C6a of the inclined surface being 30°, and the width of the upper end face of the first tip 701a being the cutting edge width L10a of the first tip 701a, where L10a is 0.5 mm.
[0037] As shown in Figure 13, the second tip 702a is a left-hand single-edged tip, with an inclined surface on the right side of the apex in the orthographic projection of the second tip 702a, the inclination angle C6a of the inclined surface being 30°, and the width of the upper end face of the second tip 702a being the cutting edge width L10a of the second tip 702a, where L10a is 0.5 mm.
[0038] Cutting tests were conducted using the circular saw blade with a corner radius tip from Example 2. Two sets of circular saw blades from different production lots were selected for the cutting tests, and three sets of alternating left-right angled blades from different manufacturers with similar specifications were selected for comparative testing. The test results are shown in Table 3.
[0039] [Table 3]
[0040] As can be seen from Table 3, the circular saw blade with corner radius tips in this embodiment maintains a consistent cutting time of 2 to 3 seconds for the same material under the same rotational speed conditions. Both the final lifespan (number of cuts) and wear ratio are superior to commercially available alternating-tooth saw blades. The cut surface of the material is smooth, and the cutting accuracy is also superior to saw blades without corner radius tip designs.
[0041] Although the technical proposals of the present invention have been described above in conjunction with preferred embodiments shown in the drawings, as will be easily understood by those skilled in the art, the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent modifications or substitutions to the relevant technical features, and all such modified or substituted proposals will fall within the scope of protection of the present invention.
[0042] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit it. To those skilled in the art, the present invention is subject to various modifications and changes. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should all be within the scope of protection.
Claims
1. A circular saw blade having a corner radius tip, comprising a saw blade body, wherein a plurality of chip discharge grooves are provided in the circumferential direction of the saw blade body, a tooth slot is provided on one side of the chip discharge groove, and a corner radius tip is welded within the tooth slot. The front end of the aforementioned corner radius chip is a corner radius rake face, A circular saw blade having a corner radius tip, characterized in that the corner radius tip includes a first tip and a second tip, the cutting edge shapes of the first tip and the second tip are different, and the first tip and the second tip are alternately arranged in the circumferential tooth slots of the saw blade body.
2. The circular saw blade having a corner radius tip according to claim 1, characterized in that the saw blade body has a plurality of sound-dampening slits, the sound-dampening slits are multi-stage arc-shaped grooves with diameters that change at equal pitches, have an S-shaped curve, and the sound-dampening slits are filled with high-damping silicone rubber.
3. The circular saw blade having a corner radius tip according to claim 2, characterized in that a starting point and an ending point are provided in the sound-dampening slit, and the angle between the positions of the starting point and the ending point is 20°.
4. A circular saw blade having a corner radius tip according to claim 1, characterized in that a support is provided at the rear end of the tooth slot, a support slope is provided on the top surface of the support, and the support slope angle of the support slope is 170.8°.
5. The aforementioned chip with a rounded corner is provided with a tip top surface tilt angle, and the tip top surface tilt angle is 6°. The circular saw blade having a corner radius tip according to claim 1, wherein the tilt angle of the tip top surface is the angle between the top surface of the corner radius tip and the tangent to the circumference on which the cutting edge is located.
6. The circular saw blade having a corner radius tip according to claim 1, characterized in that the corner radius tip has a trapezoidal structure in a planar projection plane, the width of the rear end face of the corner radius tip is smaller than the width of the front end face of the corner radius tip, and the width of the rear end face of the corner radius tip is larger than the thickness of the saw blade body.
7. The circular saw blade having a corner radius tip according to claim 1, characterized in that when the first tip is a flat blade tip, the second tip is a trapezoidal blade tip, and symmetrical inclined surfaces are provided on both sides of the top of the second tip, with the inclination angle of the symmetrical inclined surfaces being 30°.
8. The circular saw blade having a corner radius tip according to claim 7, characterized in that the radial height of the second tip is greater than the radial height of the first tip.
9. The circular saw blade having a corner radius tip according to claim 1, characterized in that when the first tip is a right-handed single-edged tip, the second tip is a left-handed single-edged tip, an inclined surface is provided on the left side of the top of the first tip with an inclination angle of 30°, and an inclined surface is also provided on the right side of the top of the second tip with an inclination angle of 30°.