CN115488427A - A double-purpose circular saw blade - Google Patents

Abstract

The invention discloses a dual-purpose circular saw blade for forward and reverse rotation, which comprises: a disc-shaped base body with a central hole, and a plurality of groups of forward and reverse rotating tool bits which are jointed on the outer circumference of the base body; a chip groove is formed between two adjacent sets of positive and negative rotating cutter heads; wherein, the bottom of part chip groove is provided with a silencing groove and a silencing hole which are communicated with each other; and a plurality of groups of heat dissipation holes arranged on the substrate; the radiating holes and the silencing holes are arranged in a staggered mode in the circumferential direction and the radial direction of the base body respectively. This positive and negative double-purpose circular saw blade that rotates can realize the corotation reversal processing of circular saw blade and use, is provided with the amortization groove in the bottom of chip groove, has seted up the amortization hole in the bottom of amortization groove, sets up the louvre on the base member, has realized amortization, the heat dissipation function of circular saw blade at the during operation, has the effect of eliminating the thermal treatment residual stress simultaneously, has reduced base member crackle risk. When the circular saw blade works, air flow is cut off and dispersed through the silencing holes and the radiating holes, so that the generation of air vortex can be effectively reduced, and the generation of harsh noise is avoided.

Description

A double-purpose circular saw blade

technical field

The invention relates to the technical field of cutting tools, in particular to a forward and reverse circular saw blade.

Background technique

Saw blades are widely used as cutting tools, but most of the existing circular saw blades are used in one-way rotation, with short service life and low utilization rate. The quality of the cutting surface of the cutting material is not high.

At present, there are also reversible saw blades that can be rotated in both directions. However, the existing reversible saw blades generally use emery to attach to the side and edge surfaces of the outer ring of the circular saw blade, and the cutting sharpness is not good. Moreover, the stress release is insufficient, and the occurrence rate of cracks in the body during use is relatively high.

Chinese patent document (disclosure date: November 4, 2015, announcement number: CN105014153A) discloses a double-edged circular saw blade, including a base body, a number of cutter heads are uniformly arranged on the outer peripheral wall of the base body, and the A "U"-shaped chip removal groove is formed between the cutter heads, the inner diameter of the opening of the chip removal groove is slightly smaller than the inner diameter of the bottom, the outer edge of the cutter head is a concave arc with an angle of 150°, and the left and right sides of the cutter head Alloy blades are respectively connected to the two sides, and the height of the alloy blades is higher than that of the cutter head. It avoids the requirement of the direction of the cutter head when the circular saw blade is installed by welding alloy blades on both sides of the cutter head.

Although the above technical solution provides a two-way circular saw blade, the saw blade has insufficient heat dissipation during use, cutting heat will cause product deformation, poor stress relief effect, and large noise.

At the same time, the high-speed rotating circular saw blade will generate air eddy current noise at the bottom of the tooth groove, and the pressure change of the air eddy current becomes the excitation source. When its frequency is an integer multiple of the natural frequency of the circular saw blade, resonance occurs, resulting in Harsh noise significantly deteriorates the working environment.

Contents of the invention

The purpose of the present invention is to solve the problems of insufficient heat dissipation in the existing two-way circular saw blades, cutting heat will cause product deformation, poor stress relief effect, easy to generate air vortex in the rotation process, and then generate harsh noises, etc., and provide a rotation process It can effectively reduce the generation of air eddy current, avoid the generation of harsh noise, and has good cutting sharpness, low energy consumption, good cutting surface, fast heat dissipation of the product, cutting heat will not cause product deformation, and the stability of the saw blade during the forward and reverse process Consistent, can effectively reduce the risk of substrate cracks during use, promote heat dissipation, and have a long service life.

The technical solution adopted by the present invention to realize its inventive purpose is: a circular saw blade with forward and reverse rotation, comprising:

disc-shaped substrate with a central hole,

A plurality of sets of forward and reverse cutter heads joined on the outer circumference of the base body; chip removal grooves are formed between adjacent two sets of forward and reverse cutter heads; wherein,

At the bottom of part of the chip flutes, there are interconnected sound-absorbing grooves and sound-absorbing holes; and

Multiple groups of cooling holes set on the substrate;

The radiating holes and the sound-absorbing holes are respectively arranged in dislocation in the circumferential direction and the radial direction of the base body.

The forward and reverse dual-purpose circular saw blade can realize the forward and reverse processing and use of the circular saw blade by basically setting multiple sets of forward and reverse cutter heads, and because the forward and reverse cutter heads are joined on the substrate, the forward and reverse The rotary cutter head can be set according to the cutting requirements. Compared with the diamond cutting technology used in the prior art, it can ensure the sharpness of the cutting and realize the good cutting quality of the cutting surface. There is a sound-absorbing groove at the bottom of the chip removal groove, and a sound-absorbing hole is opened at the bottom of the sound-absorbing groove, which can not only play the role of silencing the circular saw blade when it is working, but also realize the heat dissipation function, and at the same time, it can effectively eliminate the residue of heat treatment. Stress, reduce the risk of matrix cracks during use. The base body is provided with heat dissipation holes, which can realize the heat dissipation function when the circular saw blade is working. At the same time, the heat dissipation holes and the sound-absorbing holes are misplaced on the base body, whether in the circumferential direction or in the radial direction, and do not overlap. Different circles and different lines, this structural setting makes the air flow divergent when the circular saw blade is working, and the flow is dispersed through the sound-absorbing holes and cooling holes, which can effectively reduce the generation of air eddy currents and avoid harsh noises.

Preferably, each group of heat dissipation holes respectively includes an outer rotation heat dissipation hole and an inner rotation heat dissipation hole, and the outer rotation heat dissipation holes and the inner rotation heat dissipation holes are respectively arranged in offset positions in the circumferential direction and the radial direction of the base body. The heat dissipation holes are arranged in groups on the base body, and each group of heat dissipation holes includes an outer rotation heat dissipation hole and an inner rotation heat dissipation hole, and the outer rotation heat dissipation holes and the inner rotation heat dissipation holes in each group of heat dissipation holes are located in the radial direction of the base body and around the base body. Upward is also a misplaced setting, that is, not on the same circumference and not on the same diameter. Such a structural setting can achieve effective heat dissipation, and at the same time reduce the generation of air eddy currents and avoid noise.

Preferably, the sound-absorbing grooves, the sound-absorbing holes, and the adjacent outer-rotating heat dissipation holes and inner-rotating heat dissipation holes form a set of gas circulation and heat dissipation paths in the direction of rotation of the base body, and multiple sets of gas flow heat dissipation paths are formed on the front surface or the back surface of the base body Scattered gas rotating surface. The location of the sound-absorbing groove, the sound-absorbing hole, the outer rotation cooling hole and the inner rotation cooling hole can form a group of gas circulation and heat dissipation paths on the substrate, and the rapid circulation and heat dissipation of the air can be realized no matter whether the circular saw blade is rotating forward or reverse, and at the same time It can also reduce the generation of air vortex. In the prior art, the circular saw blade is closed in the chip flute during rotation, which causes air vortices to be generated at the bottom of the chip flute during rotation, thereby generating noise, while in the present invention, the bottom of the chip flute There is a sound-absorbing groove, and a sound-absorbing hole is connected with the sound-absorbing groove at the bottom of the sound-absorbing groove. Through the two-stage progressive structure, the groove of the sound-absorbing groove is smaller than the diameter of the sound-absorbing hole, so that the air generated by the rotation can be dispersed to avoid The air forms a vortex at the bottom of the flute to effectively dissipate heat and reduce noise. The air enters the sound-absorbing hole through the sound-absorbing groove, is then taken out by rotation, and moves in the opposite direction to the direction of base body rotation, passing through the outer-rotation heat dissipation holes and inner-rotation heat dissipation holes, so as to realize the heat dissipation of the heat generated during the cutting process of the base body, and realize the The rapid heat dissipation of the product will not cause product deformation due to cutting heat.

Preferably, each set of forward and reverse cutter heads respectively includes a double cutter head tooth back, a forward rotation cutter head and a reverse cutter head.

Preferably, a groove is provided on the outer circumference of the tooth back of the double-cutter head, and the groove includes a concave arc at the bottom of the groove, a positive rotation inclined surface and a reverse inclined surface connected to two ends of the concave arc at the bottom of the groove. A groove is set on the outer circumference of the tooth back of the double cutter head, and the bottom of the groove is provided with a concave arc at the bottom of the groove. Inclined surface and reverse inclined surface, this structure not only ensures the cutting strength of the forward and reverse cutter heads, but also ensures that both the forward and reverse cutter heads exceed the tooth back of the double cutter head, which is conducive to effective cutting.

Preferably, the forward-rotating cutter heads and reverse-rotating cutter heads in each group of forward-reversing cutter heads are symmetrically distributed, and the line of symmetry is the connecting line between the center of the center hole of the substrate and the arc center of the concave arc at the bottom of the groove. The symmetrical structural distribution of the forward-rotating cutter head and the reverse-rotating cutter head is to obtain consistent effects in the stability of the forward-reversing process.

Preferably, the forward rotating cutter head and the reverse rotating cutter head are respectively provided with a cutting edge and a chip removal surface, the cutting edge is arranged in a direction parallel to the diameter of the substrate, and one end of the chip removal surface connects the cutting edge toward the central hole of the substrate. One end and the other end are inclined from outside to inside to the chip removal groove, and are connected with the chip removal groove. The cutting edge realizes the cutting, and the chip removal surface ensures that the chips can be smoothly discharged to the chip removal groove during the cutting process, so as to ensure the quality of the cutting surface of the object to be cut, and the quality of the cutting surface will not be affected by the chips.

Preferably, the centerline of the groove depth of the sound-absorbing groove does not coincide with the diameter of the base body. Since it is necessary for the circular saw blade to be able to achieve forward and reverse rotation, in order to ensure good sound attenuation, heat dissipation and reduce the generation of air vortex during the process of forward rotation and reverse rotation, the sound attenuation groove is not set along the diameter of the base body, but Intersect with the diameter of the substrate at a spatial position, and the groove direction of the specific sound-absorbing groove is set at a certain angle with the diameter of the substrate, that is, the groove walls on both sides of the sound-absorbing groove are inclined to the diameter of the substrate.

Preferably, the walls of the sound-absorbing grooves are arranged parallel to each other, or the walls of the sound-absorbing grooves are arranged inclined from outside to inside. The walls on both sides of the sound-absorbing groove are parallel to each other, or the groove walls on both sides of the sound-absorbing groove are arranged in a figure-eight structure or a trapezoidal structure, which is more conducive to noise reduction, heat dissipation and reduction of air eddy currents.

Preferably, the sound-absorbing groove runs through the front surface and the back surface of the base body, and the groove length centerline of the sound-absorbing groove and the axis where the circular arc of the chip removal groove are located intersect in space. The sound-absorbing groove runs through the front of the substrate and the back of the substrate, but the center line of the Feitong direction is not parallel to the axis of the center hole of the substrate, that is to say, it is spaced to intersect with the axis of the arc of the chip removal groove to further ensure It ensures the sound attenuation, heat dissipation and reduction of air vortex during the forward and reverse process of the circular saw blade.

The beneficial effects of the present invention are: the forward and reverse dual-purpose circular saw blade can realize the forward and reverse processing and use of the circular saw blade, the bottom of the chip removal groove is provided with a sound-absorbing groove, and the bottom of the sound-absorbing groove is provided with a sound-absorbing hole , The heat dissipation holes are set on the substrate, which realizes the noise reduction and heat dissipation functions of the circular saw blade during work, and at the same time has the effect of eliminating the residual stress of heat treatment, reducing the risk of substrate cracks during use. When the circular saw blade is working, the air flow is cut off and dispersed through the sound-absorbing hole and the cooling hole, which can effectively reduce the generation of air vortex and avoid harsh noise.

Description of drawings

Fig. 1 is a kind of structure schematic diagram of circular saw blade of forward and reverse rotation of the present invention;

Fig. 2 is a partial enlarged view of the forward and reverse dual-purpose circular saw blade of the present invention;

Fig. 3 is a schematic diagram of a forward rotation structure of the forward and reverse dual-purpose circular saw blade of the present invention;

Fig. 4 is a schematic diagram of a reverse structure of the forward and reverse dual-purpose circular saw blade of the present invention;

Fig. 5 is a structural schematic diagram of a forward and reverse dual-purpose circular saw blade in Embodiment 2 of the present invention;

Fig. 6 is a partially enlarged view of the forward and reverse dual-purpose circular saw blade in Embodiment 3 of the present invention;

In the figure: 1. Base body, 2. Double-cutter tooth back, 3. Forward-rotating cutter head, 4. Reverse-rotating cutter head, 5. Center hole, 6. Groove, 61. Concave arc at the bottom of the groove, 62, Forward rotation inclined surface, 63, reverse inclined surface, 7, chip removal groove, 8, blade, 9, chip removal surface, 10, silencer groove, 11, silencer hole, 12, external rotation heat dissipation hole, 13, internal rotation heat dissipation hole.

detailed description

Various aspects of the present invention will be described in detail below through specific embodiments and with reference to the accompanying drawings.

Example 1:

In the embodiment shown in Fig. 1 and Fig. 2, a circular saw blade with forward and reverse rotation includes a base body 1, on which a number of double-cutter tooth backs 2 are evenly distributed, and on the double-cutter head tooth backs 2 A positive rotating cutter head 3 and a reverse rotating cutter head 4 are fixed. A central hole 5 is provided on the base body 1, and the central hole 5 is used to be installed on a cutting tool such as a cutting machine spindle, so as to realize the cutting of the workpiece to be cut. The forward rotating cutter head 3 and the reverse rotating cutter head 4 adopt alloy cutter heads, and the base body 1 can be made of materials such as diamond, high-speed steel, hard alloy, etc., and the specific materials are selected according to the needs of cutting processing.

As shown in the figure, the double-cutter tooth back 2 is provided with a groove 6 on the outer peripheral surface of the base. The positive rotation inclined surface 62 and the reverse rotation inclined surface 63 connected by the end, the inclination angle of the forward rotation inclined surface 62 and the reverse rotation slope 63 are inclined at an angle of 10-15 degrees outwards from the bottom of the groove, and the forward rotation cutter head 3 and the reverse rotation The cutter head 4 is symmetrically distributed on the tooth back 2 of the double cutter head, and the line of symmetry is the connecting line between the center of the center hole of the substrate and the arc center of the concave arc at the bottom of the groove. This design of symmetrical distribution makes the circle The saw blade is stable in the process of forward and reverse, and the consistency effect is good.

As shown in the figure, a chip removal groove 7 is arranged between the tooth backs 2 of adjacent two pairs of cutter heads. The width of the tooth back 2 of the cutter head. Such a structural design not only protects the cutting strength of the circular saw blade, but also facilitates chip removal.

The forward rotating cutter head 3 and the reverse cutter head 4 are respectively provided with a cutting edge 8 and a chip removal surface 9. The cutting edge 8 is arranged in a direction parallel to the diameter of the substrate, and one end of the chip removal surface 9 is connected to the end of the cutting edge facing the center hole of the substrate. The other end is inclined from outside to inside towards the chip discharge groove, and is docked with the semicircular arc of the chip discharge groove.

As shown in Figure 2, at the groove bottom of part of the chip removal groove 7, there is a sound-absorbing groove 10 for heat dissipation and stress-relief. One end is provided with a sound-absorbing hole 11 communicating with the sound-absorbing groove 10 , and the sound-absorbing hole 11 penetrates through the thickness direction of the base body 1 . The groove depth of the sound-absorbing groove refers to the length of the sound-absorbing groove extending from the bottom of the chip removal groove to the center hole of the base body, and the groove depth center line d of the sound-absorbing groove 10 does not coincide with the diameter D of the base body 1, and is set at an included angle. The sound-absorbing groove 10 is inclined at the bottom of the chip removal groove, that is, the sound-absorbing groove 10 runs through the front of the substrate and the back of the substrate in the direction of the groove length, and the groove length center line h of the sound-absorbing groove and the axis H where the arc of the chip removal groove is located Spatial cross setting. That is to say, the through center line of the sound-absorbing groove 10 on the front side of the base body and the back side of the base body and the axis of the circular arc of the chip removal groove are arranged to intersect in space. To effectively reduce the generation of air vortex and avoid harsh noise. At the same time, the arrangement of the sound-absorbing groove 10 and the sound-absorbing hole 11 can also effectively remove the residual stress of the circular saw blade during heat treatment, and reduce the risk of substrate cracks during use. The groove width of the sound-absorbing groove refers to the opening width of the sound-absorbing groove in the bottom circumferential direction of the chip removal groove, and the groove width w of the sound-absorbing groove 10 is much smaller than the diameter of the sound-absorbing hole 11 . The sound-absorbing groove 10 is arranged approximately in a straight line or an arc on the front side and the back side of the base body, and a straight line is adopted in this embodiment.

At the bottom of part of the flutes 7 there are silencers 10 and holes 11, instead of opening silencers and holes at the bottoms of all the flutes, the purpose is to avoid air in the cutting process. The pressure change of the eddy current becomes the excitation source, so that its frequency cannot resonate with the natural frequency of the circular saw blade, thereby avoiding harsh noise and improving the working environment.

As shown in Fig. 3 and Fig. 4, multiple groups of heat dissipation holes are also provided on the base 1, and each group of heat dissipation holes includes an outer rotation heat dissipation hole 12 and an inner rotation heat dissipation hole 13, and the inner rotation heat dissipation hole 13 is close to the center The hole 5 is set, and the outer rotation cooling hole 12 is arranged on the outside of the inner rotation cooling hole 12 and is in a different radial direction from the inner rotation cooling hole 12, and is also in a different radial direction from the sound-absorbing hole 11. On the back of the base body, the central connecting line of the outer rotation cooling hole 12, the inner rotation cooling hole 13 and the noise reduction hole 11 forms an obtuse angle structure in the direction of cutting rotation, so that the circular saw blade can effectively reduce the generation of air vortex during the rotation process , promote heat dissipation, realize rapid heat dissipation, the heat brought by cutting can be dissipated quickly, and will not cause deformation of the cut object. In this embodiment, the outer rotation cooling holes 12 and the inner rotation cooling holes 13 adopt a circular hole structure, and the hole diameters are equal. The sound-absorbing hole 11 also adopts a circular hole structure, and the diameter of the sound-absorbing hole 11 is equal to or slightly smaller than that of the outer-rotating cooling hole 12 and the inner-rotating cooling hole 13 .

The setting of the sound-absorbing groove 10, the sound-absorbing hole 11, the externally rotating heat dissipation hole 12 and the internally rotating heat dissipation hole 13 on the front side of the base body and the back side of the base body roughly forms the following structure: The central connection line forms a set of gas circulation and heat dissipation paths in the forward and reverse rotation directions on the front and back of the substrate respectively, and multiple groups of body circulation and heat dissipation paths form a gas-dissipating rotating surface on the front or back of the substrate, so as to further realize the During the rotating cutting process, the circular saw blade reduces the formation of eddy currents and accelerates the heat dissipation.

Example 2:

In the embodiment shown in Fig. 5, its technical solution is basically the same as that of Embodiment 1, the difference is that the sound-absorbing hole 11, the external rotation cooling hole 12 and the internal rotation cooling hole 13 are respectively elliptical structures, and the elliptical The major axis is arranged along the circumferential direction.

Example 3:

In the embodiment shown in FIG. 6 , the groove wall of the sound-absorbing groove 10 is inclined from the outside to the inside, that is, the groove width of the sound-absorbing groove 10 gradually increases from the bottom of the groove 7 to the central hole 5 of the substrate. That is to say, the noise reduction groove 10 is arranged in a trapezoidal structure as a whole.

The forward and reverse dual-purpose circular saw blade in the above embodiment is mainly composed of a base body 1 , a forward rotating cutter head 3 and a reverse rotating cutter head 4 . A central hole 5 is provided on the base body 1 for mounting on a cutting machine spindle. The outer rotation cooling holes 12 and the inner rotation cooling holes 13 are set on the base body 1 in the area between the central hole 5 and the tooth back 2 of the double cutter head. The bottom part of the chip removal groove 7 of the circular saw blade is provided with a noise reduction groove 10 for noise reduction, heat dissipation and stress relief, and the noise reduction hole 11 is connected to the noise reduction groove 10 . Two kinds of cutter heads, forward rotation cutter head 3 and reverse cutter head 4, are provided on the tooth back 2 of the double cutter head. The positive rotating cutter head 3 and the reverse rotating cutter head 4 are symmetrically distributed, and the symmetrical line is the connecting line between the center of the circle and the center point of the tooth back 2 grooves of the double cutter heads. The purpose of the symmetrical design is to achieve consistent effects in the stability of the forward and reverse processes. The setting of chip removal groove 7 is mainly to promote the effect of chip removal. The setting positions of the silencer groove 10, the silencer hole 11, the external rotation cooling hole 12 and the internal rotation cooling hole 13 can form a group of gas circulation and heat dissipation paths on the base 1, and the air can be quickly circulated no matter whether the circular saw blade is rotating forward or reverse. Flow heat dissipation, while reducing the generation of air vortex. A sound-absorbing groove 10 is provided at the bottom of the chip removal groove 7, and a sound-absorbing hole 11 is provided in communication with the sound-absorbing groove at the bottom of the sound-absorbing groove 10. Through a two-stage progressive structure, the groove of the sound-absorbing groove 10 is smaller than the diameter of the sound-absorbing hole 11 Therefore, the air generated by the rotation can be dispersed, and the vortex flow formed by the air at the bottom of the chip removal groove can be avoided, so as to effectively dissipate heat and reduce noise. The air enters the sound-absorbing hole through the sound-absorbing groove, is then taken out by rotation, and moves in the opposite direction to the direction of base body rotation, passing through the outer-rotation heat dissipation holes and inner-rotation heat dissipation holes, so as to realize the heat dissipation of the heat generated during the cutting process of the base body, and realize the The rapid heat dissipation of the product will not cause product deformation due to cutting heat.

It should be pointed out that what is described in the foregoing embodiments is only to illustrate the principle of the present invention, and the present invention also has various changes and improvements without departing from the scope of the present invention, and these changes and improvements all fall within the scope of the claimed invention . Based on the embodiments described in the present invention, all other embodiments obtained by persons of ordinary skill in the art on the basis of the technical solutions of the present application without creative work shall fall within the protection scope of the present invention .

Claims (10)

1. A forward and reverse dual-purpose circular saw blade, characterized in that it comprises: a disc-shaped base body (1) with a central hole (5), A plurality of groups of forward and reverse cutter heads joined on the outer circumference of the base (1); chip removal grooves (7) are formed between adjacent two groups of forward and reverse cutter heads; wherein, A muffler groove (10) and a muffler hole (11) communicating with each other are provided at the bottom of part of the flutes; and Multiple groups of cooling holes arranged on the base (1); The radiating holes and the sound-absorbing holes (11) are respectively arranged in dislocation in the circumferential direction and the radial direction of the base body (1). 2. The forward and reverse dual-purpose circular saw blade according to claim 1, characterized in that: each group of cooling holes includes externally rotating cooling holes (12) and internally rotating cooling holes (13), and the externally rotating cooling holes (12 ) and the inner rotation cooling holes (13) are respectively arranged in dislocation in the circumferential direction and the radial direction of the base body (1). 3. The forward and reverse dual-purpose circular saw blade according to claim 2, characterized in that: the sound-absorbing groove (10), the sound-absorbing hole (11) and the adjacent externally rotating cooling hole (12) and internally rotating The cooling holes (13) form a group of gas circulation and heat dissipation paths in the rotation direction of the substrate, and multiple groups of gas circulation and heat dissipation paths form a gas dissipation rotating surface on the front or back of the substrate. 4. The forward and reverse dual-purpose circular saw blade according to claim 1, characterized in that: each set of forward and reverse cutter heads respectively includes a double cutter head tooth back (2), a forward rotation cutter head (3) and a reverse Cutter head (4). 5. The dual-purpose circular saw blade according to claim 4, characterized in that: a groove (6) is provided on the outer circumference of the tooth back (2) of the double cutter head, and the groove (6) It includes a groove bottom concave arc (61), a positive rotation inclined surface (62) and a reverse rotation slope (63) connected to both ends of the groove bottom concave arc (61). 6. The forward and reverse dual-purpose circular saw blade according to claim 5, characterized in that: the forward rotation cutter head (3) and the reverse rotation cutter head (4) in each group of forward and reverse cutter heads are symmetrically distributed , the line of symmetry is the connecting line between the center of the center hole (5) of the substrate and the arc center of the concave arc (61) at the bottom of the groove. 7. The dual-purpose circular saw blade for forward and reverse rotation according to claim 4, characterized in that: the forward rotation cutter head (3) and the reverse rotation cutter head (4) are respectively provided with blades (8) and chip removal surface (9), the cutting edge (8) is arranged roughly parallel to the diameter of the base body (1), one end of the chip removal surface (9) is connected to the end of the cutting edge facing the center hole of the base body, and the other end is from outside to inside toward chip removal The groove (7) is arranged obliquely, and is docked with the chip removal groove (7). 8. The forward and reverse dual-purpose circular saw blade according to any one of claims 1 to 5, characterized in that: the centerline of the groove depth of the sound-absorbing groove (10) does not coincide with the diameter of the base (1). 9. The forward and reverse dual-purpose circular saw blade according to claim 8, characterized in that: the groove walls of the noise reduction groove (10) are arranged in parallel, or the groove walls of the noise reduction groove (10) are arranged inclined from outside to inside . 10. The forward and reverse dual-purpose circular saw blade according to any one of claims 1 to 5, characterized in that: the sound-absorbing groove (10) runs through the front and back of the substrate, and the sound-absorbing groove (10) The long center line of the flute and the axis where the circular arc of the chip removal flute (7) are located are space-intersecting.

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