Cutting insert and cutting tool

Abstract

The invention discloses a cutting blade and a cutting tool, and relates to the field of cutters, the cutting blade comprises a top surface, a bottom surface and side surfaces, the top surface and the bottom surface are oppositely arranged along the thickness direction of the cutting blade, the side surfaces are respectively connected with the top surface and the bottom surface, and the top surface and the bottom surface are oppositely arranged along the thickness direction of the cutting blade. A cutting edge is formed at the joint of the side surface and the top surface; wherein the top surface comprises a margin surface, a front cutter surface and a groove part which are connected in sequence, the margin surface extends in the extending direction of the cutting edge, a plurality of notch parts which are distributed at intervals in the extending direction of the cutting edge are formed in the surface of the margin surface, the front cutter surface obliquely extends from the margin surface to the groove part, and the notch parts are distributed at intervals in the extending direction of the cutting edge. And a plurality of convex parts which are arranged in sequence are formed on the surface of the groove part. According to the cutting blade provided by the embodiment of the invention, local high temperature and thermal stress concentration can be reduced, the heat dissipation efficiency is improved, and the service life of a cutting tool is effectively prolonged.

Description

Cutting inserts and cutting tools Technical Field

[0001] This application relates to the field of cutting tools, and in particular to a cutting insert and a cutting tool. Background Technology

[0002] In metal cutting semi-finishing, medium machining and low feed rate conditions, continuous ribbon-like chips are easily generated. These chips are very easy to wrap around the insert and tool holder, which not only scratches the machined surface of the workpiece, but also forms a heat insulation layer, which prevents the cutting fluid from entering and wrapping the cutting edge. This prevents the heat in the cutting area from being dissipated in time, causing the local temperature to rise sharply, resulting in softening of the insert material, accelerated wear, and even chipping, which greatly shortens the tool life.

[0003] Currently, most chip breaking tools use chip breaker grooves or chip breakers to break chips, but they can only break chips from a single direction or in a single form. They have limited effect on guiding chip removal, making it difficult to solve the problem of localized thermal stress concentration caused by chip entanglement. They cannot efficiently dissipate the heat accumulated in the chip contact area between the cutting tool and the cutting tool, and the tool life is still difficult to meet the machining requirements. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a cutting insert that can reduce local high temperature and thermal stress concentration, improve heat dissipation efficiency, and effectively extend the service life of the cutting tool.

[0005] This application also proposes a cutting tool having the aforementioned cutting insert.

[0006] A cutting insert according to an embodiment of this application includes a top surface, a bottom surface, and a side surface. The top surface and the bottom surface are disposed opposite to each other along the thickness direction of the cutting insert. The side surface is connected to the top surface and the bottom surface, and a cutting edge is formed at the connection between the side surface and the top surface. The top surface includes a cutting edge surface, a rake face, and a groove portion connected in sequence. The cutting edge surface extends along the extension direction of the cutting edge, and a plurality of notches are formed on the surface of the cutting edge surface at intervals along the extension direction of the cutting edge. The rake face extends obliquely from the cutting edge surface toward the groove portion, and a plurality of protrusions are formed on the surface of the groove portion.

[0007] According to an embodiment of this application, the cutting insert includes a top surface, a bottom surface, and a side surface. The top surface includes a cutting edge surface, a rake face, and a groove portion connected in sequence. The surface of the cutting edge surface has multiple notches spaced apart along the extension direction of the cutting edge. The notches can achieve segmented constraint and chip breaking. The surface of the groove portion has multiple protrusions arranged in sequence. The protrusions can increase the effective heat dissipation area of ​​the cutting insert, reduce local high temperature and thermal stress concentration near the cutting edge, improve heat dissipation efficiency, and effectively extend the service life of the cutting tool.

[0008] In some embodiments of this application, the notch is constructed as an arc-shaped concave surface, and the surface of the notch is formed with a plurality of ribs extending toward the groove.

[0009] In some embodiments of this application, the width of the notch gradually increases along the direction of the rake face toward the cutting edge, and a plurality of the ribs are symmetrically distributed along the center line of the notch.

[0010] In some embodiments of this application, the angle between the extension direction of each rib and the tangent direction of the lowest point of the notch at its location is α and satisfies: 0 < α < 90°.

[0011] In some embodiments of this application, the cutting edge includes a side cutting edge and a corner cutting edge. Along the extending direction of the side cutting edge, the distribution density of the notch portion in the region near the corner cutting edge is greater than the distribution density in the central region near the side cutting edge.

[0012] In some embodiments of this application, the distribution density of the protrusions in the groove region near the corner cutting edge is greater than the distribution density of the protrusions in the groove region near the middle region of the side cutting edge.

[0013] In some embodiments of this application, the average height of the protrusion in the groove region near the corner cutting edge is less than the average height of the protrusion in the groove region near the middle region of the side cutting edge.

[0014] In some embodiments of this application, the rake face has a plurality of smoothly connected arc surfaces in sequence, and the radius of curvature of each arc surface increases sequentially along the direction of the cutting edge toward the groove.

[0015] In some embodiments of this application, along the direction of the cutting edge toward the groove, the angle between the tangent at the center point of each arc surface and the top surface decreases sequentially.

[0016] The cutting tools of embodiments of this application are described below.

[0017] The cutting tool according to the embodiments of this application is provided with a tool body and cutting inserts as described in the above embodiments. There are multiple cutting inserts, which are spaced apart along the circumference of the tool body. Since the cutting tool of the embodiments of this application is provided with a tool body and cutting inserts as described in the above embodiments, the cutting insert of the cutting tool includes a top surface, a bottom surface and a side surface. The top surface includes a cutting edge surface, a rake face and a groove portion connected in sequence. The surface of the groove portion is formed with multiple protrusions arranged in sequence. The protrusions can increase the effective heat dissipation area of ​​the cutting insert, reduce the local high temperature and thermal stress concentration near the cutting edge, improve heat dissipation efficiency and effectively extend the service life of the cutting tool.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: FIG1 is a structural schematic diagram of a cutting blade according to an embodiment of the present application; FIG2 is a top view of FIG1; FIG3 is a partially enlarged schematic diagram of circle A in FIG2; FIG4 is a partially cross-sectional schematic diagram of BB in FIG2; FIG5 is a partially cross-sectional schematic diagram of BB in FIG2; FIG6 is a partially enlarged schematic diagram of circle C in FIG2; and FIG7 is a partially cross-sectional schematic diagram of DD in FIG2.

[0020] Reference numerals: 10, cutting insert; 11, top surface; 111, cutting edge; 112, side cutting edge; 113, corner cutting edge; 12, bottom surface; 13, side surface; 14, cutting edge surface; 141, notch; 142, rib; 15, rake face; 151, arc surface; 16, groove; 161, protrusion. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] The cutting blade 10 according to an embodiment of the present application is described below with reference to Figures 1-7. The cutting blade 10 includes a top surface 11, a bottom surface 12, and a side surface 13.

[0023] The top surface 11 and the bottom surface 12 are arranged opposite each other along the thickness direction of the cutting insert 10. The side surface 13 is connected to the top surface 11 and the bottom surface 12 respectively, and a cutting edge 111 is formed at the connection between the side surface 13 and the top surface 11. The top surface 11 includes a cutting edge 14, a rake face 15 and a groove 16 connected in sequence. The cutting edge 14 extends along the extension direction of the cutting edge 111, and the surface of the cutting edge 14 has a plurality of notches 141 that are spaced apart along the extension direction of the cutting edge 111. The rake face 15 extends obliquely from the cutting edge 14 toward the groove 16, and the surface of the groove 16 has a plurality of protrusions 161 arranged in sequence.

[0024] In metal cutting semi-finishing, medium machining and low feed conditions, continuous ribbon-like chips are easily generated. These chips are very easy to wrap around the insert and tool holder, which not only scratches the machined surface of the workpiece, but also forms a heat insulation layer, which prevents the cutting fluid from entering and wrapping the cutting edge. This prevents the heat in the cutting zone from being dissipated in time, causing the local temperature to rise sharply, resulting in softening of the insert material, accelerated wear, and even chipping, which greatly shortens the tool life.

[0025] Currently, most chip breaking tools use chip breaker grooves or chip breakers to break chips, but they can only break chips from a single direction or in a single form. They have limited effect on guiding chip removal, making it difficult to solve the problem of localized thermal stress concentration caused by chip entanglement. They cannot efficiently dissipate the heat accumulated in the chip contact area between the cutting tool and the cutting tool, and the tool life is still difficult to meet the machining requirements.

[0026] In response, this application proposes a cutting insert 10 that can reduce local high temperature and thermal stress concentration, improve heat dissipation efficiency, and effectively extend the service life of the cutting tool.

[0027] Specifically, the cutting insert 10 includes a top surface 11, a bottom surface 12, and a side surface 13. The top surface 11 and the bottom surface 12 can be arranged opposite each other along the thickness direction of the cutting insert 10, and the side surface 13 can be arranged around the circumference of the cutting insert 10. The side surface 13 can be connected to the top surface 11 and the bottom surface 12 respectively. A cutting edge 111 can be formed at the connection between the side surface 13 and the top surface 11. That is, the intersection of the side surface 13 and the top surface 11 forms the cutting edge 111. The cutting edge 111 is used for cutting. In some embodiments, the cutting edge 111 can be formed at the connection between the side surface 13 and the bottom surface 12. Optionally, the cutting edge 111 can play an auxiliary cutting role to meet the usage requirements of multi-directional cutting conditions.

[0028] Furthermore, the top surface 11 may include a cutting edge surface 14, a rake face 15, and a groove 16 connected in sequence. The cutting edge surface 14 may extend along the extension direction of the cutting edge 111, and a notch 141 may be formed on the surface of the cutting edge surface 14. There may be multiple notches 141, and the multiple notches 141 may be distributed at intervals along the extension direction of the cutting edge 111. The notches 141 can achieve the function of segmented constraint and segmented chip breaking, so that the originally continuous strip of chips is effectively divided, curled and broken when passing through the cutting edge surface 14, thereby reducing the risk of long chips wrapping around the insert and the tool holder.

[0029] The rake face 15 extends obliquely from the cutting edge 14 toward the groove 16. The rake face 15 can act as a guide to stably guide the broken chips, allowing them to exit along a preset path and preventing chip accumulation from interfering with the cutting process. The surface of the groove 16 can be formed with multiple sequentially arranged protrusions 161. By setting multiple protrusions 161, the effective heat dissipation area of ​​the groove 16 can be increased, improving the heat exchange efficiency between the coolant and the groove 16, accelerating the rapid removal of heat from the cutting area, reducing local high temperature and thermal stress concentration, thereby effectively reducing local high temperature and thermal stress concentration near the cutting edge 111, suppressing the overheating, softening, and accelerated wear of the cutting tool caused by chip insulation, and improving the service life and machining stability of the cutting tool.

[0030] In short, the cutting insert 10 of this application embodiment includes a top surface 11, a bottom surface 12, and a side surface 13. The top surface 11 includes a cutting edge surface 14, a rake face 15, and a groove portion 16 connected in sequence. The surface of the cutting edge surface 14 has a plurality of notches 141 spaced apart along the extension direction of the cutting edge 111. The notches 141 can achieve segmented constraint and segmented chip breaking. The surface of the groove portion 16 has a plurality of protrusions 161 arranged in sequence. The protrusions 161 can increase the effective heat dissipation area of ​​the cutting insert 10, reduce local high temperature and thermal stress concentration near the cutting edge 111, improve heat dissipation efficiency, and effectively extend the service life of the cutting tool.

[0031] As shown in Figure 3, in some embodiments of this application, the notch 141 can be constructed as an arc-shaped concave surface. It is understood that when the chips generated during the cutting process flow through the arc-shaped concave surface, the chips are subjected to the force of the concave surface, causing them to curl and deform laterally, thereby achieving orderly curling and breaking control of the chips and avoiding excessively long chips from winding and accumulating, which would affect the stability of the cutting process.

[0032] The surface of the notch 141 can be formed with ribs 142. Multiple ribs 142 can be formed, and all ribs 142 extend towards the groove 16. By providing multiple ribs 142, the contact friction and micro-deformation points between the notch 141 and the chip can be increased. This causes the chip to be subjected to multi-point compression, shearing, and disturbance during flow, resulting in longitudinal tearing of the chip and further improving the chip-breaking effect. Furthermore, by providing the arc-shaped concave surface and ribs 142, the overall heat dissipation surface area of ​​the notch 141 can be effectively increased. This improves heat exchange efficiency during the initial contact stage between the chip and the notch 141, quickly dissipating heat generated in the cutting area, reducing cutting temperature, delaying tool wear, and improving tool life and machining reliability.

[0033] As shown in Figure 3, in some embodiments of this application, the width of the notch 141 gradually increases along the direction from the rake face 15 toward the cutting edge 111. It can be understood that the projection of the notch 141 in the thickness direction of the cutting insert 10 is generally arranged in a trapezoidal shape. This arrangement can conform to the initial flow trajectory of the chip, so that the chip can smoothly enter the notch 141 area and avoid chip jamming or flow disorder.

[0034] Multiple ribs 142 can be symmetrically distributed along the centerline of the notch 141. By symmetrically distributing multiple ribs 142 along the centerline of the notch 141, a uniform and directional tearing and guiding effect can be generated on the lower surface of the chip, ensuring that it can enter the rake face 15 area in a more stable and concentrated direction, avoiding chip splashing, and improving the continuity and stability of the cutting process. In some embodiments, the ribs 142 may include ribs 142 located in the middle region and ribs 142 distributed on the side regions adjacent to them. The extension direction of the ribs 142 in the middle region is approximately perpendicular to the extension direction of the adjacent cutting edge 111, which can apply a stable squeezing and tearing effect to the middle body of the chip. The ribs 142 in the side regions can be symmetrically deflected at a predetermined angle relative to the ribs 142 in the middle region, thereby forming guidance and constraint on both sides of the chip, thus ensuring that the cutting can enter the rake face 15 area in a more stable and concentrated direction.

[0035] As shown in Figure 4, in some embodiments of this application, the angle between the extending direction of each rib 142 and the tangent direction of the lowest point of the notch 141 at its location is α. It can be understood that the connection point between the bottom end of the rib 142 and the notch 141 can be the lowest point of the notch 141 at that rib 142, and the angle between the extending direction of the rib 142 and the tangent direction of the lowest point is α. The angle between the extending direction of each rib 142 and the tangent direction of the lowest point of the notch 141 at its location satisfies the following relationship: 0 < α < 90°. It can be understood that the angle between the extension direction of each rib 142 and the tangent direction of the lowest point of the notch 141 at its location can be an acute angle. For example, the angle between the extension direction of each rib 142 and the tangent direction of the lowest point of the notch 141 at its location can be, but is not limited to, 15°, 30°, 45°, 60°, etc. This setting can make the height difference between the rib 142 and the notch 141 gradually decrease in the chip flow direction, thereby reducing the resistance of the chip entering the rake face 15 after tearing.

[0036] As shown in Figures 1 and 2, in some embodiments of this application, the cutting edge 111 includes a side cutting edge 112 and a corner cutting edge 113. The side cutting edge 112 can be arranged on the side of the cutting insert 10, and the corner cutting edge 113 can be formed in the corner transition region of the cutting insert 10. Along the extending direction of the side cutting edge 112, the distribution density of the notch 141 near the corner cutting edge 113 is greater than the distribution density near the middle region of the side cutting edge 112; that is, the distribution density of the notch 141 near the corner cutting edge 113 is higher. The notch 141 is denser and more densely arranged, while the notch 141 near the middle region of the side cutting edge 112 has a relatively smaller distribution density and is more sparse. By setting the distribution density of the notch 141 according to the cutting load at different positions of the cutting edge 111, the notch 141 can be arranged in zones. This ensures that sufficient chip breaking and heat dissipation structures are provided in the corner cutting edge 113 region, and simplifies the structure in the middle region of the side cutting edge 112 where the cutting conditions are relatively gentle. Thus, while ensuring overall cutting performance, the process cost is reduced, and the structural rationality and economy are maintained.

[0037] Furthermore, in a specific embodiment, multiple notches 141 arranged at intervals along the extension direction of the side cutting edge 112 can divide the side cutting edge 112 into a first cutting segment, a second cutting segment, and a third cutting segment that are sequentially adjacent. The first cutting segment, the second cutting segment, and the third cutting segment can be sequentially adjacent and continuously transitioned. Among them, the first cutting segment is adjacent to the corner cutting edge 113 and corresponds to the transition area with a higher cutting load. The length of the first cutting segment is less than the length of the second cutting segment, the length of the second cutting segment is less than the length of the third cutting segment, and the third cutting segment is located in the area where the working condition of the side cutting edge 112 is the most gentle. Through the multi-segment structure with increasing length, the distribution law of the cutting load can be further adapted, the cutting support capacity in the high-load area can be strengthened, and the cutting smoothness in the gentle area can be optimized, thereby further improving the cutting effect and structural stability.

[0038] As shown in Figure 6, in some embodiments of this application, the protrusions 161 in the groove region 16 are arranged in sections. In the groove region 16 near the corner cutting edge 113, the distribution density of the protrusions 161 is greater than that in the groove region 16 near the middle region of the side cutting edge 112. It can be understood that the distribution density of the protrusions 161 in the groove region 16 near the corner cutting edge 113 is larger, the arrangement is more dense, and the number of protrusions 161 per unit area is greater. In the groove region 16 near the middle region of the side cutting edge 112, the distribution density of the protrusions 161 is relatively smaller, the arrangement is more sparse, and the number of protrusions 161 per unit area is correspondingly reduced. In areas with a high distribution density of protrusions 161, more space can be formed between multiple protrusions 161, thereby ensuring more coolant retention, enhancing the cooling and lubrication effect of the cutting tip, and the densely distributed protrusions 161 can reduce the contact area between the chips and the grooves 16, reducing the resistance during cutting motion, making chip removal smoother, thus benefiting the cutting tip cooling efficiency and overall chip removal performance.

[0039] As shown in Figure 7, in some embodiments of this application, the height of the protrusions 161 within the groove region 16 can be set in sections to adapt to the thermal load and stress conditions at different positions of the cutting edge 111. Specifically, in the groove region 16 near the corner cutting edge 113, the average height of the protrusions 161 is less than the average height of the protrusions 161 in the groove region 16 near the middle region of the side cutting edge 112. It can be understood that the overall height of the protrusions 161 in the groove region 16 near the corner cutting edge 113 is lower, and the height of the protrusions 161 in the groove region 16 near the middle region of the side cutting edge 112 is also lower. The overall height of area 6 is relatively higher. By setting a cluster of protrusions 161 with higher density and lower average height in the area corresponding to the tool tip, stress concentration caused by excessive height of protrusions 161 can be avoided. At the same time, the efficient cooling and enhanced heat dissipation capacity can be precisely applied to the key parts with the highest heat load to the maximum extent, thus delaying the overheating failure of the tool tip. In the middle area of ​​the side cutting edge 112 where the cutting temperature is relatively low and the working conditions are relatively gentle, a design with sparsely distributed and higher protrusions 161 is adopted. This can not only meet the basic heat dissipation and chip removal requirements, but also simplify the structural forming process, reduce process costs, and maintain structural rationality and economy.

[0040] As shown in Figure 7, in some embodiments of this application, the bottom surface 12 of the groove 16 can be formed by the tops of multiple protrusions 161, making the bottom surface 12 of the groove 16 a discontinuous surface. By providing multiple protrusions 161 that are densely distributed and adjacent to each other on the bottom surface 12 of the groove 16, a global microstructure heat dissipation interface is formed, achieving active turbulence of the coolant flow field and a significant increase in heat transfer area. This structure can transform the smooth groove bottom into a rough interface with a huge surface area, which can strongly disrupt the laminar flow of the coolant, induce global turbulence and microvortices, and generate a continuous micro-jet scouring effect, thereby greatly improving the convective heat transfer efficiency between the coolant and the blade surface.

[0041] As shown in Figure 5, in some embodiments of this application, the rake face 15 has a plurality of smoothly connected arc surfaces 151 in sequence. Along the direction from the cutting edge 111 toward the groove portion 16, the radius of curvature of each arc surface 151 increases sequentially. By adopting an arrangement in which the radius of curvature of each arc surface 151 gradually increases, the chips can be guided in stages, so that the chips can maintain a stable flow state under different feed conditions.

[0042] When the machining feed rate is small, the generated chips are short. In this case, after flowing through the notch 141, the chips only reach the arc surface 151 with a small radius of curvature and do not extend to the bottom of the groove 16. The arc surface 151 with a small radius of curvature can provide a certain chip space, which can guide the unbroken chips to curl longitudinally again, causing the chips to curl and break. At the same time, the arc surface 151 can also store a certain amount of cutting fluid, prolonging the contact time between the chips and the coolant, enhancing the heat exchange effect, further removing the heat generated by cutting, and reducing the cutting temperature.

[0043] When the machining feed rate is large, the generated chip size is relatively long. The chip can flow continuously along the rake face 15 and reach the arc surface 151 with the largest radius of curvature. This structure has the largest radius of curvature, which can prevent the chip from getting stuck or accumulating, and can guide the chip to the bottom more smoothly, ensuring smooth chip removal under large feed conditions and improving the stability and continuity of the cutting process.

[0044] As shown in Figure 5, in some embodiments of this application, along the direction from the cutting edge 111 toward the groove 16, the angle between the tangent at the center point of each arc surface 151 and the top surface 11 decreases sequentially. It can be understood that a tangent is drawn at the midpoint of an arc surface 151, and the angle between the tangent and the top surface 11 is defined as β. The angle β corresponding to each arc surface 151 decreases sequentially along the direction from the cutting edge 111 toward the groove 16. This setting can conform to the flow trend of cutting and reduce the resistance of chips that can reach the bottom of the groove. That is, the angle value of the front arc surface 151 near the cutting edge 111 is larger and the inclination is greater, which provides sufficient clearance area for the initial curling and deformation of the chips. The angle value of the rear arc surface 151 near the groove 16 is smaller and the inclination is smaller, so that the chips can slide smoothly into the bottom of the groove 16 with less resistance. At the same time, the clearance area provided by the front arc surface 151 can promote the conduction of cutting heat to the air, improve the heat exchange effect, further remove the heat generated by cutting, and reduce the cutting temperature.

[0045] The cutting tools of embodiments of this application are described below.

[0046] The cutting tool according to the embodiments of this application is provided with a tool body and a cutting blade 10 as described in the above embodiments. There are multiple cutting blades 10, which are arranged at intervals along the circumference of the tool body. Since the cutting tool of the embodiments of this application is provided with a tool body and a cutting blade 10 as described in the above embodiments, the cutting blade 10 of the cutting tool includes a top surface 11, a bottom surface 12, and a side surface 13. The top surface 11 includes a cutting edge surface 14, a rake surface 15, and a groove portion 16 connected in sequence. The surface of the groove portion 16 is formed with multiple protrusions 161 arranged in sequence. The protrusions 161 can increase the effective heat dissipation area of ​​the cutting blade 10, reduce the local high temperature and thermal stress concentration near the cutting edge 111, improve heat dissipation efficiency, and effectively extend the service life of the cutting tool.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0049] In the description of this application, "multiple" means two or more.

[0050] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0051] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cutting blade, characterized in that, include: The cutting insert has a top surface (11), a bottom surface (12), and a side surface (13). The top surface (11) and the bottom surface (12) are arranged opposite each other along the thickness direction of the cutting insert. The side surface (13) is connected to the top surface (11) and the bottom surface (12) respectively, and a cutting edge (111) is formed at the connection between the side surface (13) and the top surface (11). The top surface (11) includes a cutting edge surface (14), a rake face (15), and a groove (16) connected in sequence. The cutting edge surface (14) extends along the extension direction of the cutting edge (111), and a plurality of notches (141) are formed on the surface of the cutting edge surface (14) at intervals along the extension direction of the cutting edge (111). The rake face (15) extends obliquely from the cutting edge surface (14) toward the groove (16), and a plurality of protrusions (161) are formed on the surface of the groove (16).

2. The cutting blade according to claim 1, characterized in that, The notch (141) is constructed as an arc-shaped concave surface, and the surface of the notch (141) is formed with a plurality of ribs (142) extending toward the groove (16).

3. The cutting blade according to claim 2, characterized in that, Along the direction of the rake face (15) toward the cutting edge (111), the width of the notch (141) gradually increases, and a plurality of the ribs (142) are symmetrically distributed along the center line of the notch (141).

4. The cutting blade according to claim 3, characterized in that, The angle between the extension direction of each of the ribs (142) and the tangent direction of the lowest point of the notch (141) at its location is α and satisfies: 0 < α < 90°.

5. The cutting blade according to claim 1, characterized in that, The cutting edge (111) includes a side cutting edge (112) and a corner cutting edge (113). Along the extension direction of the side cutting edge (112), the distribution density of the notch (141) in the region near the corner cutting edge (113) is greater than the distribution density in the central region near the side cutting edge (112).

6. The cutting blade according to claim 5, characterized in that, The distribution density of the protrusions (161) in the groove (16) region near the corner cutting edge (113) is greater than the distribution density of the protrusions (161) in the groove (16) region near the middle region of the side cutting edge (112).

7. The cutting blade according to claim 6, characterized in that, The average height of the protrusion (161) in the groove (16) region near the corner cutting edge (113) is less than the average height of the protrusion (161) in the groove (16) region near the middle region of the side cutting edge (112).

8. The cutting blade according to claim 1, characterized in that, The front face (15) has a plurality of arc surfaces (151) that are connected smoothly in sequence. Along the direction of the cutting edge (111) toward the groove (16), the radius of curvature of each arc surface (151) increases sequentially.

9. The cutting blade according to claim 8, characterized in that, Along the direction of the cutting edge (111) toward the groove (16), the angle between the tangent at the center point of each arc surface (151) and the top surface (11) decreases sequentially.

10. A cutting tool, characterized in that, include: Blade body; A cutting blade, wherein the cutting blade is constructed as described in any one of claims 1-9, and there are multiple cutting blades, which are spaced apart circumferentially along the tool body.

Images