Cutting insert and cutting tool

Abstract

The invention discloses a cutting blade, and belongs to the technical field of cutting tools. The two front chip wrapping arm faces of the two chip reversing arms form a V-shaped chip wrapping structure, the two rear chip wrapping arm faces of the two chip reversing arms also form a V-shaped chip wrapping structure, and the included angle of the V-shaped chip wrapping groove structure formed by the two front chip wrapping arm faces is larger than that of the V-shaped chip wrapping groove structure formed by the two rear chip wrapping arm faces. Thus, due to the abrupt change dip angle design of the two-section type chip wrapping arm face, a section of protruding connection face is formed between the front chip wrapping arm face and the rear chip wrapping arm face, due to the fact that the angle of the front chip wrapping arm face and the angle of the rear chip wrapping arm face are abrupt change, large shear stress is generated when cuttings pass through the structure of the transition convex arc face, the cuttings are broken more easily, and the cutting efficiency is improved. The chip breaking point in the groove cutting structure has the same function as a chip breaking point in a common groove cutting structure, but the undesirable phenomenon that the chip breaking point design excessively occupies the space of the chip containing groove is avoided, the larger space of the chip containing groove can be obtained, and therefore chip wrapping and chip containing during medium-high feeding or inner hole groove cutting machining of the blade are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of cutting tools, and in particular to a cutting insert and a cutting tool. Background Art

[0002] Cutting inserts are usually used for cutting metal or similar material workpieces, mainly for grooving and turning operations. At present, indexable inserts are widely used in grooving and turning of parts in the aviation, general machinery, automobile, small parts and other industries. Faced with various complex working conditions, in order to meet the industry's internal requirements for the surface quality, processing accuracy and processing efficiency of the workpiece, it has higher requirements for the cutting edge design of the cutting insert.

[0003] At present, for such dual-purpose grooving and turning inserts, the chip grooves at the grooving part are often designed with built-in convex points. Although this can enhance the chip breaking ability of the insert during medium and low feed processing, the chips are not easy to be discharged during medium and high feed grooving and inner hole grooving processing, and the insert is required to have excellent chip holding function. The convex point design occupies the chip groove structure, which is not conducive to such processing conditions. In addition, the side turning structure of the current dual-purpose grooving and turning inserts is often just a section of side straight edge with a section of rake face. When facing different turning cutting depth environments, its chip breaking and chip curling performance generally leads to low workpiece processing quality and cannot well meet the needs of various turning processing conditions. Summary of the invention

[0004] The embodiment of the present application provides a cutting blade and a cutting tool. It can solve the problem that the cutting tool in the prior art has low processing quality for workpieces under complex working conditions. The technical solution is as follows:

[0005] In one aspect, a cutting insert is provided, the cutting insert comprising:

[0006] A main body, and a cutting portion fixedly connected to an end of the main body, wherein the cutting portion and the main body are arranged along a first direction;

[0007] The cutting portion has an upper surface and a bottom surface arranged along a second direction, and a back cutting surface connecting the upper surface and the bottom surface, and the second direction is perpendicular to the first direction;

[0008] The upper surface of the cutting portion has: a rake face, and two anti-chip arms extending along the first direction, wherein the intersection of the rake face and the flank face forms a main cutting edge; the two anti-chip arms are arranged opposite to each other along the extension direction of the main cutting edge, and the first ends of the two anti-chip arms extend to the main cutting edge, the second ends of the two anti-chip arms are connected, and the two anti-chip arms and the rake face are used to enclose a chip groove;

[0009] Among them, one side of each chip anti-chip arm facing the chip groove has a front chip arm surface, a transition raised arc surface and a rear chip arm surface which are connected and arranged along the extension direction of the chip anti-chip arm, and the first angle of the two front chip arm surfaces of the two chip anti-chip arms in the first target plane is greater than the second angle of the two rear chip arm surfaces of the two chip anti-chip arms in the first target plane, and the first target plane is a plane perpendicular to the first direction and parallel to the second direction.

[0010] Optionally, the difference between the first angle and the second angle is greater than or equal to 15 degrees.

[0011] Optionally, the top of each anti-chip arm has a front chip arm surface and a rear chip arm surface connected and arranged along the extension direction of the anti-chip arm, and the two sides of the front chip arm surface are smoothly connected to the front chip arm surface, the rear chip arm surface, and the bottom surface of the chip groove; the two sides of the rear chip arm surface are smoothly connected to the rear chip arm surface and the bottom surface of the chip groove;

[0012] Among them, one side of the front chip arm surface is connected to the main cutting edge, the side of the front chip arm surface away from the chip groove is a straight edge, and the width of the front chip arm surface gradually decreases and then gradually increases in the direction away from the main cutting edge and close to the main body; the rear chip arm surface is an arc convex surface and is tangent to the front chip arm surface.

[0013] Optionally, the front chip arm surface is inclined in a direction away from the main cutting edge and away from the bottom surface, and the front cutting edge surface is inclined in a direction away from the main cutting edge and toward the bottom surface;

[0014] Among them, the third angle between the front chip arm surface and the second target plane is a negative rake angle; the fourth angle between the front cutting edge surface and the second target plane is a positive rake angle, and the second target plane is a plane passing through the main cutting edge and parallel to the first direction.

[0015] Optionally, the cutting portion further has two side relief surfaces arranged along a third direction, and the third direction is perpendicular to both the first direction and the second direction;

[0016] The upper surface of the cutting portion further comprises: a turning chip breaker arm fixedly connected to a side of the anti-chip arm away from the chip groove, and a turning rake face distributed on a side of the turning chip breaker arm away from the chip groove, wherein a side cutting edge is formed at the intersection of the turning rake face and the side flank face, and the turning rake face is smoothly connected to the chip breaker face of the turning chip breaker arm;

[0017] Wherein, the angle between the chip breaking surface of the turning chip breaker arm and the turning rake face is an obtuse angle.

[0018] Optionally, the turning chip breaker arm comprises: a front turning chip breaker portion, a central turning chip breaker portion and a rear turning chip breaker portion arranged in sequence along the extension direction of the turning chip breaker arm, the front turning chip breaker portion is connected with the main cutting edge; the turning rake face comprises: a first sub-turning rake face corresponding to the front turning chip breaker portion, a second sub-turning rake face corresponding to the central turning chip breaker portion, and a third sub-turning rake face corresponding to the rear turning chip breaker portion;

[0019] Among them, the width of the first sub-turning front cutting edge gradually decreases in the direction away from the main cutting edge and close to the main body; the width of the second sub-turning front cutting edge first gradually increases and then gradually decreases in the direction away from the main cutting edge and close to the main body; the width of the third sub-turning front cutting edge gradually increases in the direction away from the main cutting edge and close to the main body.

[0020] Optionally, the width of the front cutting edge along the extension direction of the main cutting edge is W1, the width of the connecting section of the front chip arm surface and the main cutting edge along the extension direction of the main cutting edge is W2, and the width between the side of the front chip arm surface away from the chip groove and the side cutting edge along the extension direction of the main cutting edge is W3; the length of the front turning chip breaker along the extension direction of the side cutting edge is L2, the length of the central turning chip breaker along the extension direction of the side cutting edge is L3, and the length of the rear turning chip breaker along the extension direction of the side cutting edge is L4;

[0021] Among them, the optional recommended values ​​are 1.25W3≤L2≤2.5W3, 0.75(W1+2W2+2W3)-L2≤L3≤1.25(W1+2W2+2W3)-L2, 0.75L2≤L4≤2.50L2.

[0022] Optionally, the length of the front cutting edge along the extension direction of the main cutting edge is W1, the width of the connecting section between the front chip arm surface and the main cutting edge along the extension direction of the main cutting edge is W2, and the length between the side of the front chip arm surface away from the chip groove and the side cutting edge along the extension direction of the main cutting edge is W3; wherein,

[0023] 0.3(W1+2W2+2W3)≤W1≤0.8(W1+2W2+2W3),

[0024] 0.1(W1+2W2+2W3)≤W2≤0.35(W1+2W2+2W3),

[0025] 0.1(W1+2W2+2W3)≤W3≤0.35(W1+2W2+2W3).

[0026] Optionally, the upper surface of the cutting portion further has a coolant guide groove located on the side of the chip groove away from the main cutting edge, and the coolant guide groove is connected to the chip groove.

[0027] In another aspect, a cutting tool is provided, the cutting tool comprising:

[0028] A cutter body and a cutting blade, wherein the cutting blade is mounted on the cutter body, and the cutting blade is any one of the cutting blades given above.

[0029] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0030] A cutting blade may include: a main body, and a cutting portion fixedly connected to the end of the main body. Two front chip arm surfaces of two anti-chip arms form a "V"-shaped chip wrapping structure, and two rear chip arm surfaces of two anti-chip arms also form a "V"-shaped chip wrapping structure, and the angle of the V-shaped chip wrapping groove structure formed by the two front chip arm surfaces is greater than the angle of the V-shaped chip wrapping groove structure formed by the two rear chip arm surfaces. In this way, the above-mentioned two-stage chip wrapping arm surface sudden change in inclination angle design will form a protruding connecting surface (i.e., transition convex arc surface) between the front chip wrapping arm surface and the rear chip wrapping arm surface. The transition convex arc surface will generate a large shear stress when the chips pass through the structure due to the sudden change in the angle of the front and rear chip wrapping arm surfaces, making the chips easier to break, playing the same role as the chip breaking point in the general grooving structure, but avoiding the undesirable phenomenon of excessive occupation of the chip groove space by the chip breaking point design, which is conducive to obtaining a larger chip groove space, thereby facilitating the chip wrapping and chip holding when the blade performs medium and high feed or inner hole grooving processing. In addition, the two-stage chip wrapping arm surface design allows smaller chips to be subjected to shear stress at the transition raised arc surface when moving from the main cutting edge to the rear end in the chip groove, thereby breaking the chips better. For larger and more rigid chips generated under working conditions such as medium and high feed, after the transition raised arc surface, the space between the chip wrapping arms on both sides is reduced, causing the chips to be subjected to a greater force to be squeezed and wrapped toward the middle part, thereby having excellent chip wrapping performance for large chips, avoiding large chips from affecting the surface quality of the workpiece, and thus ensuring that the cutting tool integrated with the cutting insert has a better processing quality for the workpiece.

[0031] In addition, the widths of different sub-turning front cutting surfaces extending along the first direction of the turning structure on both sides of the cutting blade are not fixed values, wherein the width of the first sub-turning front cutting surface gradually decreases in the direction away from the main cutting edge and close to the main body. Such a design allows the chips to move along the first sub-turning front cutting surface toward the front turning chip breaking portion under turning processing conditions with lower cutting depths (such as when the cutting depth is less than the length L2). The chips away from the main cutting edge position first contact the front turning chip breaker arm, and then the chips close to the main cutting edge position gradually contact the front turning chip breaker arm. Through this structural design, stable C-shaped chips can be formed during turning processing with lower cutting depths, which helps to break and discharge the chips and improve the surface quality of the workpiece processing. In addition, the width of the second sub-turning rake face first increases and then decreases in the direction away from the main cutting edge and close to the main body. With this design, when the turning depth is between the length L2 and (L2+L3), the front turning chip breaker and the central turning chip breaker act simultaneously to form two C-shaped chips curled in the diverging direction. Compared with the straight-edge chip reversing arm design, it is more conducive to the chip breaking and discharge of larger chips, avoiding the formation of larger chips that scratch the workpiece surface, thereby improving the workpiece surface processing quality. The width of the third sub-turning rake face corresponding to the last rear turning chip breaker increases from small to large, which can guide the large chips formed in the large-depth turning process to the rear for discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic structural diagram of a cutting blade provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 A top view of the cutting portion shown in FIG.

[0035] Figure 3 yes Figure 2 A cross-sectional view at A-A';

[0036] Figure 4 yes Figure 2 A cross-sectional view at B-B';

[0037] Figure 5 It is a projection view of the back face of a cutting portion provided in an embodiment of the present application;

[0038] Figure 6 is a top view of another cutting portion provided in an embodiment of the present application;

[0039] Figure 7 is a schematic structural diagram of another cutting blade provided in an embodiment of the present application;

[0040] Figure 8 It is a projection view of the side flank surface of a cutting portion near the main cutting edge provided by an embodiment of the present application;

[0041] Fig. 9 yes Figure 7 A cross-sectional view at C-C';

[0042] Fig.10 Another embodiment of the present application provides Figure 2 A cross-sectional view at B-B';

[0043] Fig.11 yes Fig.10 A local enlarged schematic diagram at D;

[0044] Fig.12 This is a schematic diagram of the structure of another cutting blade provided in an embodiment of the present application.

[0045] Among them, cutting blade 000, main body 100, cutting part 200, first direction f1, second direction f2, upper surface A1, front cutting edge A11, bottom surface A2, back cutting edge A3, anti-chip arm 201, main cutting edge R1, chip groove C, front chip arm surface B1, transition raised arc surface B2, back chip arm surface B3, first target plane P1, first angle α1, second angle α2, second target plane P2, front chip arm surface J1, back chip arm surface J2, platform surface J3, third angle ε, fourth angle δ, side back cutting edge A4, third direction f3, turning front cutting edge A12, turning chip breaker arm 202, side cutting edge R2, angle γ, corner cutting arc edge R3, front turning chip breaker portion 202a, central turning chip breaker portion 202b, back turning chip breaker portion 202c, first A sub-turning front cutting edge Q1, a second sub-turning front cutting edge Q2, a third sub-turning front cutting edge Q3, an included angle η, a length W1 of the front cutting edge A11, a width W2 of the front chip arm surface, a width W3 of the turning and grooving junction, a width W4 of the guide groove, a width L1 of the orthographic projection of the front cutting edge A11 on the second target plane P2, a length L2 of the front turning chip breaking portion, a length L3 of the central turning chip breaking portion, a length L4 of the rear turning chip breaking portion, a coolant guide groove 203, a side a1 of the front chip arm surface J1 away from the chip groove C, a chip breaking arm surface D1 of the front turning chip breaking portion 202a, a chip breaking arm surface D2 of the central turning chip breaking portion 202b, a width d1 of the first sub-turning front cutting edge Q1, a width d2 of the second sub-turning front cutting edge Q2, a width d3 of the third sub-turning front cutting edge Q3, and an upper positioning groove surface 101.

[0046] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0050] In the related art, a convex point design is usually added to the cutting blade on the cutting groove structure design, which is mainly used to enhance the chip breaking performance. This convex point design will occupy a larger cutting groove chip groove space. During medium and high feed processing and inner hole processing, the chip groove cannot accommodate longer and larger chips well, which will cause the chips to scratch the machined surface, thereby affecting the quality of the machined surface. In addition, in the turning structure design, its side turning structure is only a section of side straight edge with a section of front cutting tool face. When facing different turning cutting depth environments, its chip breaking and chip curling performance generally leads to lower workpiece processing quality and cannot meet the various turning processing conditions.

[0051] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 is a schematic diagram of the structure of a cutting blade provided in an embodiment of the present application, Figure 2 yes Figure 1 A top view of the cutting portion is shown in FIG. Figure 3 yes Figure 2 The cross-sectional view at A-A', Figure 4 yes Figure 2The cutting blade 000 may include: a main body 100, and a cutting portion 200 fixedly connected to the end of the main body 100, and the cutting portion 200 may be arranged along the first direction f1 with the main body 100. Here, the number of the cutting portions 200 in the cutting blade 000 may be one or two, and the embodiment of the present application does not make a specific limitation on this.

[0052] The cutting portion 200 in the cutting blade 000 may have an upper surface A1 and a bottom surface A2 arranged along a second direction f2, and a flank surface A3 connecting the upper surface A1 and the bottom surface A2 of the cutting portion, and the second direction f2 may be perpendicular to the first direction f1. For example, the first direction f1 may be the X-axis direction, and the second direction f2 may be the Z-axis direction. The flank surface A3 of the cutting portion 200 may be a side of the cutting portion 200 that is away from the main body 100.

[0053] The upper surface A1 of the cutting portion 200 may have: a rake face A11, and two anti-chip arms 201 extending along the first direction f1, and the intersection of the rake face A11 and the flank face A3 may form a main cutting edge R1. The two anti-chip arms 201 may be arranged opposite to each other along the extension direction of the main cutting edge R1, and the first ends of the two anti-chip arms 201 both extend to the main cutting edge R1, and the second ends of the two anti-chip arms 201 are connected to each other, and the two anti-chip arms 201 and the rake face A11 may be used to enclose a chip groove C.

[0054] Among them, one side of each anti-chip arm 201 facing the chip groove C may have a front chip arm surface B1, a transition convex arc surface B2 and a rear chip arm surface B3 which are connected and arranged along the extension direction of the anti-chip arm 201, and the first angle α1 of the two front chip arm surfaces B1 in the two anti-chip arms 201 in the first target plane P1 is greater than the second angle α2 of the two rear chip arm surfaces B3 in the two anti-chip arms 201 in the first target plane P1. Here, the first target plane P1 may be a plane perpendicular to the first direction f1 and parallel to the second direction f2. For example, the two front chip arm surfaces B1 in the two anti-chip arms 201 may be symmetrically distributed along the central axis of the chip groove C, the two transition convex arc surfaces B2 in the two anti-chip arms 201 may be symmetrically distributed along the central axis of the chip groove C, and the two rear chip arm surfaces B3 in the two anti-chip arms 201 may be symmetrically distributed along the central axis of the chip groove C.

[0055] In the embodiment of the present application, the two front chip arm surfaces B1 in the two anti-chip arms 201 form a "V"-shaped chip wrapping structure, and the two rear chip wrapping arm surfaces B3 in the two anti-chip arms 201 also form a "V"-shaped chip wrapping structure, and the angle of the V-shaped chip groove structure formed by the two front chip wrapping arm surfaces B1 is greater than the angle of the V-shaped chip groove structure formed by the two rear chip wrapping arm surfaces B3. In this way, the above-mentioned two-stage chip arm surface sudden change in inclination angle design will form a protruding connecting surface (i.e., transition raised arc surface B2) between the front chip arm surface B1 and the rear chip arm surface B3. The transition raised arc surface B2 will generate greater shear stress when the chips pass through the structure due to the sudden change in the angle of the front and rear chip arm surfaces, making the chips easier to break, playing the same role as the chip breaking point in the general grooving structure, but avoiding the undesirable phenomenon of excessive occupation of the chip groove space by the chip breaking point design, which is conducive to obtaining a larger chip groove space, thereby facilitating chip wrapping and chip holding when the cutting blade 000 performs medium and high feed or inner hole grooving processing. In addition, the two-stage chip wrapping arm surface design can make smaller chips, when moving from the main cutting edge R1 to the rear end in the chip groove C, be subjected to shear stress at the transition raised arc surface B2, thereby achieving better chip breaking. As for larger and more rigid chips generated under working conditions such as medium and high feed, after the transition raised arc surface B2, the space between the chip wrapping arm surfaces on both sides is reduced, so that the chips are subjected to a greater force to be squeezed and wrapped toward the middle part, thereby having excellent chip wrapping performance for large chips, avoiding large chips from affecting the surface quality of the workpiece, and thus ensuring that the cutting tool integrated with the cutting insert has a good processing quality for the workpiece.

[0056] Optionally, the difference between the first angle α1 of the two front chip arm surfaces B1 of the two anti-chip arms 201 in the first target plane P1 and the second angle α2 of the two rear chip arm surfaces B3 of the two anti-chip arms 201 in the first target plane P1 can be greater than or equal to 15 degrees. For example, the angle range of the first angle α1 can be: 120 degrees to 160 degrees, for example, the angle of the first angle α1 can be 120 degrees, 140 degrees or 160 degrees, etc.; the angle range of the second angle α2 can be: 60 degrees to 120 degrees, for example, the angle of the second angle α2 can be 60 degrees, 100 degrees or 120 degrees, etc.

[0057] In the examples of this application, please refer to Figure 5 and Figure 6 , Figure 5 is a projection view of the back face of a cutting portion provided in an embodiment of the present application, Figure 6It is a top view of another cutting portion provided by an embodiment of the present application. The top of each anti-chip arm 201 may have a front chip arm surface J1 and a rear chip arm surface J2 connected and arranged along the extension direction of the anti-chip arm 201, one side of the front chip arm surface B1 in the anti-chip arm 201 may be smoothly connected to the front chip arm surface J1 and the rear chip arm surface J2, and the other side of the front chip arm surface B1 may be smoothly connected to the bottom surface of the chip groove C. The two sides of the rear chip arm surface B3 in the anti-chip arm 201 may be smoothly connected to the rear chip arm surface J2 and the bottom surface of the chip groove C, respectively. Among them, one side of the front chip arm surface J1 may be connected to the main cutting edge R1, and the side a1 of the front chip arm surface J1 away from the chip groove C may be a straight edge, and the width of the front chip arm surface J1 may first gradually decrease and then gradually increase in the direction away from the main cutting edge R1 and close to the main body 100. The rear chip rolling arm surface J2 in the chip reversing arm 201 is an arc convex surface and is tangent to the front chip rolling arm surface J1.

[0058] In this case, the front cutting face A11 of the cutting part 200 and the front chip arm face J1 in the two anti-chip arms 201 can form a "π"-shaped main cutting groove structure, and the width of the front chip arm face J1 gradually decreases first and then gradually increases, that is, it is similar to a semi-funnel shape. This structural design allows the front chip arm face J1 to have the largest width on the main cutting edge R1, which can effectively improve the structural strength of the tool tip. At the same time, as the cutting moves inward with the front chip arm face J1, the friction resistance it encounters decreases as the width of the front chip arm face J1 becomes smaller and smaller, and the extrusion stress on the chips gradually increases, which helps the chips to wrap around the chip groove C in the middle part. The rear chip arm face J2 is connected to the back of the front chip arm face J1, and the rear chip arm face J2 is a circular arc surface that is tangentially connected to the front chip arm face J1. Such anti-chip structure design can effectively make the chips curl along the front and rear chip curling arm surfaces when passing through, improve the chip curling efficiency, thereby avoiding irregular chips from scratching the workpiece surface and improving the surface quality of the processed workpiece. In addition, the side of the front chip curling arm surface J1 away from the chip groove C is a straight edge a1. Such a structural design can cooperate with the side turning structure in the cutting blade 000, which is conducive to turning and breaking chips at a lower cutting depth. It should be noted that the side turning structure in the cutting blade 000 can be described in subsequent embodiments.

[0059] It should be noted that the rear end of the rear chip arm surface J2 can be connected to the platform surface J3 in the cutting part 200 connected to the main body part 100, and the rear chip arm surface J2 and the platform surface J3 can be connected by a transitional arc surface.

[0060] Optional, please refer to Figure 7 , Figure 8 and Fig. 9 , Figure 7 is a schematic diagram of the structure of another cutting blade provided in an embodiment of the present application, Figure 8This is a projection view of the side flank surface of a cutting portion near the main cutting edge provided in an embodiment of the present application. Fig. 9 yes Figure 7 Cross-sectional view at C-C'. The front chip arm surface J1 in the anti-chip arm 201 can be inclined in a direction away from the main cutting edge R1 and away from the bottom surface A2 of the cutting portion 200, and the front cutting surface A11 in the cutting portion 200 can be inclined in a direction away from the main cutting edge R1 and toward the bottom surface A2 of the cutting portion 200. Among them, the third angle ε between the front chip arm surface J1 in the anti-chip arm 201 and the second target plane P2 can be a negative front angle, and the fourth angle δ between the front cutting surface A11 in the cutting portion 200 and the second target plane P2 can be a positive front angle. Here, the second target plane P2 can be a plane passing through the main cutting edge R1 and parallel to the first direction f1.

[0061] In this case, the design of staggered positive and negative rake angles of the front chip arm surface J1 and the front cutting face A11 at the center can, on the one hand, increase the contact area between the cutting blade 000 and the workpiece during cutting, thereby expanding the heat dissipation area during cutting, improving the heat dissipation efficiency of the cutting blade 000 during cutting, and increasing the service life of the cutting blade 000. In addition, the negative rake angle design of the front chip arm surface J1 can effectively enhance the strength of the tool tip, and the positive rake angle design of the front cutting face A11 can make the main cutting edge of the cutting blade 000 sharper, making the cutting blade 000 easier to cut and improving the cutting efficiency.

[0062] For example, the value range of the fourth angle δ can be: 0°≤δ≤30°, and the value range of the third angle ε can be: 0°≤ε≤20°. And the value range of the width L1 of the orthographic projection of the rake face A11 in the cutting portion 200 on the second target plane P2 can be: 0 mm to 0.5 mm. For example, the fourth angle δ can be 0°, 5°, 10°, 15°, 20°, 25° or 30°, etc.; the third angle ε can be 0°, 5°, 10°, 15° or 20°, etc.; the width L1 can be 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0063] In the embodiments of the present application, Figure 6 and Figure 7As shown, the cutting portion 200 may also have two side flank faces A4 arranged along a third direction f3, and the third direction f3 may be perpendicular to both the first direction f1 and the second direction f3. The upper surface A1 of the cutting portion 200 may also have: a turning chip breaker arm 202 fixedly connected to the side of the anti-chip arm 201 away from the chip groove C, and a turning front cutting face A12 distributed on the side of the turning chip breaker arm 202 away from the chip groove C. The turning front cutting face A12 may form a side cutting edge R2 at the intersection with the side flank face A4, and the turning front cutting face A12 is smoothly connected to the chip breaker arm surface D of the turning chip breaker arm 202. Among them, the angle between the chip breaker arm surface D of the turning chip breaker arm 202 and the turning front cutting face A12 is an obtuse angle.

[0064] For examples, please refer to Figure 2 and Fig.10 , Fig.10 yes Figure 2 Sectional view at B-B'. The range of the angle γ between the turning front cutting edge A12 and the second target plane P2 can be: 0°≤γ≤20°. Here, γ can be adjusted according to different workpieces and working conditions. If rough turning or intermittent turning is required, the value of γ can be increased to increase the strength of the side cutting edge; if fine turning or processing of viscous materials requires a sharper side cutting edge R2, the γ value can be reduced to obtain a sharper side cutting edge R2. Exemplarily, the angle γ can be 0°, 5°, 10°, 15° or 20°, etc.

[0065] In this application, if Figure 7 As shown, the intersection of the back cutting surface A3 and the side back cutting surface A4 of the cutting portion 200 forms a corner cutting arc edge R3 which is respectively arranged adjacent to the main cutting edge R1 and the side cutting edge R2. It should be noted that during the cutting process of the cutting blade 000, the corner cutting arc edge R3 will be involved in the processing regardless of the feeding process along the X-axis or the Y-axis. At the same time, the strength of the corner cutting arc edge R3 is also the weakest. The edge damage of the cutting blade 000 usually first appears at the corner cutting arc edge R3.

[0066] In this application, please refer to Figure 6 , Figure 7 and Fig.11 , Fig.11 yes Fig.10A partial enlarged schematic diagram at D. The turning chip breaker arm 202 may include: a front turning chip breaker portion 202a, a central turning chip breaker portion 202b and a rear turning chip breaker portion 202c arranged in sequence along the extension direction of the turning chip breaker arm 202, and the front turning chip breaker portion 202a may be connected to the main cutting edge R1. The turning front cutting edge A12 may include: a first sub-turning front cutting edge Q1 corresponding to the front turning chip breaker portion 202a, a second sub-turning front cutting edge Q2 corresponding to the central turning chip breaker portion 202b, and a third sub-turning front cutting edge Q3 corresponding to the rear turning chip breaker portion 202c. Among them, the width d1 of the first sub-turning rake face Q1 gradually decreases in the direction away from the main cutting edge R1 and close to the main body 100; the width d2 of the second sub-turning rake face Q2 gradually increases and then gradually decreases in the direction away from the main cutting edge R1 and close to the main body 100; the width d3 of the third sub-turning rake face Q3 gradually increases in the direction away from the main cutting edge R1 and close to the main body 100. It should be noted that the "gradually decreasing" and "gradually increasing" described above do not limit the change rate of the width to be the same at any position, but are only for illustrating the change trend of the width of different parts.

[0067] In this case, in the front turning chip breaking portion 202a section, the width d1 of the corresponding first sub-turning front cutting edge Q1 gradually decreases toward the rear; in the central turning chip breaking portion 202b section, the width d2 of the corresponding second sub-turning front cutting edge Q2 first gradually increases and then gradually decreases toward the rear direction, forming an intermediate bow shape of an "recurve bow" type; in the rear turning chip breaking portion 202c section, the width d3 of the corresponding third sub-turning front cutting edge Q3 gradually increases from small toward the rear. In this way, when the cutting depth of the front turning chip breaker 202a is low (the cutting depth is less than the length of the front turning chip breaker 202a), the chips on the rear side first contact the chip breaking arm surface D1 of the front turning chip breaker 202a when the chips move toward the center along the first sub-turning front cutting edge Q1, and the chips at the front end gradually contact the chip breaking arm surface D1 of the front turning chip breaker 202a. When passing through the chip breaking arm surface D1 of the front turning chip breaker 202a, due to the existence of a certain angle η between the chip breaking surface D1 of the front turning chip breaker 202a and the first sub-turning front cutting edge Q1, the chips are subjected to bending stress, thereby forming a "C" type chip discharge. Because the cutting depth is low and the chips are thin when turning shallow grooves with low cutting depths, good rigidity is not formed, and it is not easy to break the chips. Compared with the side straight-edge chip reversing structure, this front turning chip breaker 202a structure can not only make the chips have bending stress perpendicular to the side turning edge direction, but also make the chips have shear stress toward the grooving direction when passing through the front turning chip breaker 202a. The shear stress in this direction can better promote chip breaking during shallow groove and low cutting depth turning processing, thereby improving the processing efficiency and workpiece surface quality of shallow groove and low cutting depth turning processing.

[0068] When the cutting depth of the cutting blade 000 during turning is greater than the length of the front turning chip breaker portion, the front turning chip breaker portion 202a and the central turning chip breaker portion 202b act simultaneously, and the central turning chip breaker portion 202b forms an intermediate bow shape of an "inverse bow" type, and the width of the front half of the front cutting face Q2 corresponding to the second sub-turning front cutting face Q2 gradually increases, forming a double "C" shaped turning chip breaker structure with the front turning chip breaker portion 202a, so that large chips can first pass through the front turning chip breaker portion 202a and the central turning chip breaker portion. When the convex point at the intersection of 202b is subjected to a large shear stress, the large chip is divided into two parts. The first half of the chip forms a C-shaped chip curling toward the front side of the cutting blade 000 at the front turning chip breaker portion 202a, while the second half of the chip forms a C-shaped chip curling toward the rear of the cutting blade 000 at the front half arc chip arm surface of the chip breaker arm surface D2 of the central turning chip breaker portion 202b because the chip breaker arm surface D2 of the central turning chip breaker portion 202b and the second sub-turning front cutting edge Q2 also have an included angle η.

[0069] Compared with the straight-edge chip-reversing arm surface, this design of dividing the chips and making the two chip-breaking surfaces face the front and back directions respectively can, on the one hand, avoid the formation of large turning chips that scratch the processing surface and improve the processing quality of the workpiece surface. On the other hand, for materials with high viscosity, such as copper and aluminum alloys, this design can maximize the chip-breaking ability of the blade during turning and avoid the formation of agglomerated chips. The rear half of the central turning breaking portion 202b, that is, the part where the width d2 of the rear half of the corresponding second sub-turning front cutting edge Q2 changes from large to small, can form a certain chip wrapping effect on the larger "C"-shaped chips in the latter section when the turning cutting depth is greater, making the chips easier to wrap and break. The last rear turning chip-breaking portion 202c, whose corresponding third sub-turning front cutting edge Q3 has a width d3 that changes from small to large, can divert the excessive chips to the rear for discharge.

[0070] For example, Fig.11 As shown, there is a certain angle η between the chip breaking arm surface D1 of the front turning chip breaking portion 202a and the first sub-turning front cutting edge Q1, and the range value of the angle η can be: 120 degrees to 140 degrees. There is a certain angle η between the chip breaking arm surface D2 of the central turning chip breaking portion 202b and the second sub-turning front cutting edge Q2, and the range value of the angle η can be: 120 degrees to 140 degrees. For example, the angle η can be 120 degrees, 130 degrees or 140 degrees, etc.

[0071] Optional, such as Figure 5 , Figure 6 and Figure 7As shown, the width of the front cutting face A11 in the cutting part 200 along the extension direction of the main cutting edge R1 is W1, the width of the connecting section between the front chip arm face J1 and the main cutting edge R1 in the anti-chip arm 201 along the extension direction of the main cutting edge R1 is W2, and the width between the side a1 of the front chip arm face J1 away from the chip groove C and the side cutting edge R2 along the extension direction of the main cutting edge R1 is W3. The length of the front turning chip breaker 202a along the extension direction of the side cutting edge R2 is L2, the length of the central turning chip breaker 202b along the extension direction of the side cutting edge R2 is L3, and the length of the rear turning chip breaker 202c along the extension direction of the side cutting edge R2 is L4.

[0072] Among them, the length W1 of the front cutting edge A11 along the extension direction of the main cutting edge, the width W2 of the connecting section between the front chip arm surface J1 and the main cutting edge R1 along the extension direction of the main cutting edge R1, the width W3 between the side a1 of the front chip arm surface J1 away from the chip groove C and the side cutting edge R2 along the extension direction of the main cutting edge R1, the length L2 of the front turning chip breaking portion 202a along the extension direction of the side cutting edge R2, the length L3 of the central turning chip breaking portion 202b along the extension direction of the side cutting edge R2 and the length L4 of the rear turning chip breaking portion 202c along the extension direction of the side cutting edge R2 can satisfy the following relationship: 1.25W3≤L2≤2.5W3, 0.75(W1+2W2+2W3)-L2≤L3≤1.25(W1+2W2+2W3)-L2, 0.75L2≤L4≤2.50L2.

[0073] In the present application, the length W1 of the front cutting edge A11 along the extension direction of the main cutting edge R1, the width W2 of the connecting section between the front chip arm surface J1 and the main cutting edge R1 along the extension direction of the main cutting edge R1, and the width W3 between the side a1 of the front chip arm surface J1 away from the chip groove C and the side cutting edge R2 along the extension direction of the main cutting edge R1 can satisfy the following relationship: 0.3(W1+2W2+2W3)≤W1≤0.8(W1+2W2+2W3), 0.1(W1+2W2+2W3)≤W2≤0.35(W1+2W2+2W3), 0.1(W1+2W2+2W3)≤W3≤0.35(W1+2W2+2W3).

[0074] It should be noted that the width of the front cutting face A11 along the extension direction of the main cutting edge R1 is W1. The larger the width, the wider the chip groove C of the cutting insert 000, and the better the chip holding performance of the corresponding chip groove C. However, a larger W1 value will occupy more side turning structure space, which is not conducive to the side turning structure design. At the same time, it will also reduce the width of the front chip arm surface J1 and the rear chip arm surface J2 in the anti-chip arm 201, which is not conducive to chip rolling. Therefore, the above W1 value is recommended. The width of the connecting section between the front chip arm surface J1 and the main cutting edge R1 along the extension direction of the main cutting edge R1 is W2. This value mainly affects the edge strength and chip rolling performance of the cutting insert 000. The larger the value, the stronger the edge strength and chip rolling performance, but it is also limited by the overall width distribution, so the above W2 value is recommended. The width between the side a1 of the front chip arm surface J1 away from the chip groove C and the side cutting edge R2 along the extension direction of the main cutting edge R1 is W3. This value is mainly limited by the radius of the corner cutting arc edge R3. Normally, the W3 value should be greater than the radius of the corner cutting arc edge R3. If this value is less than the radius of the corner cutting arc edge R3, it will affect the chip breaking performance of the cutting insert 000 during turning. Therefore, the above W3 value is recommended.

[0075] In the embodiments of the present application, Figure 6 and Figure 7 As shown, the upper surface A1 of the cutting portion 200 may also have a coolant guide groove 203 located on the side of the chip groove C away from the main cutting edge R1, and the coolant guide groove 203 is connected to the chip groove C. In this way, when grooving, the coolant from above can flow into the chip groove C in the cutting insert 000 along the coolant guide groove 203, thereby better cooling the chip processing of the cutting insert 000 and improving the processing stability and service life of the cutting insert 000.

[0076] For example, the width W4 of the coolant guide groove 203 may be in the range of 0.25W1≤W4≤0.50W1.

[0077] In summary, the embodiment of the present application provides a cutting blade 000, which may include: a main body 100, and a cutting portion 200 fixedly connected to the end of the main body 100. The two front chip arm surfaces B1 of the two anti-chip arms 201 form a "V"-shaped chip wrapping structure, and the two rear chip arm surfaces B3 of the two anti-chip arms 201 also form a "V"-shaped chip wrapping structure, and the angle of the V-shaped chip groove structure formed by the two front chip arm surfaces B1 is greater than the angle of the V-shaped chip groove structure formed by the two rear chip arm surfaces B3. In this way, the above-mentioned two-stage chip arm surface sudden change in inclination angle design will form a protruding connecting surface (i.e., transition convex arc surface B2) between the front chip arm surface B1 and the rear chip arm surface B3. The transition convex arc surface B2 will cause the chips to generate greater shear stress when passing through the structure due to the sudden change in the angle of the front and rear chip arm surfaces, making the chips easier to break, playing the same role as the chip breaking point in the general grooving structure, but avoiding the undesirable phenomenon of excessive occupation of the chip groove space by the chip breaking point design, which is conducive to obtaining a larger chip groove space, thereby facilitating chip wrapping and chip holding when the cutting blade 000 performs medium and high feed or inner hole grooving processing. In addition, the two-stage chip wrapping arm surface design allows smaller chips to be subjected to shear stress at the transition raised arc surface B2 when moving from the main cutting edge R1 to the rear end in the chip groove, thereby breaking the chips better. As for larger and more rigid chips generated under working conditions such as medium and high feed, after the transition raised arc surface B2, the space between the chip wrapping arm surfaces on both sides is reduced, causing the chips to be subjected to a greater force to be squeezed and wrapped toward the middle part, thereby having excellent chip wrapping performance for large chips, avoiding large chips from affecting the surface quality of the workpiece, and thereby ensuring that the cutting tool integrated with the cutting insert 000 has a better processing quality for the workpiece.

[0078] At the same time, for the turning structure, the three-stage turning front cutting edge width design forms a "recurve bow" type structure; in this way, when the cutting depth of the front turning chip breaker 202a is low (the cutting depth is less than the length of the front turning chip breaker 202a), when the chips move toward the center along the first sub-turning front cutting edge Q1, the chips on the rear side first contact the chip breaking arm surface D1 of the front turning chip breaker 202a, and the chips at the front end gradually contact the chip breaking arm surface D1 of the front turning chip breaker 202a. When passing through the chip breaking arm surface D1 of the front turning chip breaker 202a, due to the existence of a certain angle η between the chip breaking surface D1 of the front turning chip breaker 202a and the first sub-turning front cutting edge Q1, the chips are subjected to bending stress, thereby forming a "C" type chip discharge. This improves the processing efficiency and workpiece surface quality of shallow groove low cutting depth turning.

[0079] When the cutting depth of the cutting blade 000 during turning is greater than the length of the front turning chip breaker portion, the front turning chip breaker portion 202a and the central turning chip breaker portion 202b act simultaneously to form a double "C" shaped turning chip breaker structure, which can make the large chips first undergo a larger shear stress when passing through the convex point at the intersection of the front turning chip breaker portion 202a and the central turning chip breaker portion 202b, so that the large chips are divided into two parts here. The front half of the chips form C-shaped chips curling toward the front side of the cutting blade 000 at the front turning chip breaker portion 202a, and the rear half of the chips form C-shaped chips curling toward the rear of the cutting blade 000 at the front half of the chip breaker arm surface D2 of the central turning chip breaker portion 202b because the chip breaker arm surface D2 of the central turning chip breaker portion 202b also has an angle η with the second sub-turning front cutting edge Q2.

[0080] Compared with the straight-edge chip-reversing arm surface, this design of dividing the chips and making the two chip-breaking surfaces face the front and back directions respectively can, on the one hand, avoid the formation of large turning chips that scratch the processing surface and improve the processing quality of the workpiece surface. On the other hand, for materials with high viscosity, such as copper and aluminum alloys, this design can maximize the chip-breaking ability of the blade during turning and avoid the formation of agglomerated chips. The rear half of the central turning breaking portion 202b, that is, the part where the width d2 of the rear half of the corresponding second sub-turning front cutting edge Q2 changes from large to small, can form a certain chip wrapping effect on the larger "C"-shaped chips in the latter section when the turning cutting depth is greater, making the chips easier to wrap and break. The last rear turning chip-breaking portion 202c, whose corresponding third sub-turning front cutting edge Q3 has a width d3 that changes from small to large, can divert the excessive chips to the rear for discharge.

[0081] The present application also provides a cutting tool, which may include: a tool body (not shown in the figure) and a cutting blade 000, wherein the cutting blade 000 is mounted on the tool body, that is, the cutting blade 000 is mounted on the tool body, and the cutting of the cutting blade is driven by the rotation or movement of the tool body. The mounting structure between the cutting blade and the tool body is not an improvement of the present application, and those skilled in the art may assemble the cutting blade and the tool body according to the existing mounting method, which will not be described in detail here. For example, please refer to Fig.12 , Fig.12 1 is a schematic diagram of the structure of another cutting blade provided in an embodiment of the present application. The main body 100 of the cutting blade 000 may have an upper positioning groove surface 101 and a lower positioning groove surface (not shown in the figure) arranged opposite to each other along the second direction f2, and a portion of the lower positioning groove surface may be distributed on the bottom surface A2 of the cutting part 200, and the upper positioning groove surface 101 and the lower positioning groove surface in the main body 100 may realize the positioning and installation of the cutting blade 000 and the blade body.

[0082] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0083] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cutting insert, characterized in that: include: A main body, and a cutting portion fixedly connected to an end of the main body, wherein the cutting portion and the main body are arranged along a first direction; The cutting portion has an upper surface and a bottom surface arranged along a second direction, and a back cutting surface connecting the upper surface and the bottom surface, and the second direction is perpendicular to the first direction; The upper surface of the cutting portion has: a rake face, and two anti-chip arms extending along the first direction, wherein the intersection of the rake face and the flank face forms a main cutting edge; the two anti-chip arms are arranged opposite to each other along the extension direction of the main cutting edge, and the first ends of the two anti-chip arms extend to the main cutting edge, the second ends of the two anti-chip arms are connected, and the two anti-chip arms and the rake face are used to enclose a chip groove; Among them, one side of each chip anti-chip arm facing the chip groove has a front chip arm surface, a transition raised arc surface and a rear chip arm surface which are connected and arranged along the extension direction of the chip anti-chip arm, and the first angle of the two front chip arm surfaces of the two chip anti-chip arms in the first target plane is greater than the second angle of the two rear chip arm surfaces of the two chip anti-chip arms in the first target plane, and the first target plane is a plane perpendicular to the first direction and parallel to the second direction.

2. The cutting insert according to claim 1, characterized in that A difference between the first angle and the second angle is greater than or equal to 15 degrees.

3. The cutting insert according to claim 1, characterized in that The top of each anti-chip arm has a front chip arm surface and a rear chip arm surface connected and arranged along the extension direction of the anti-chip arm, and the two sides of the front chip arm surface are smoothly connected to the front chip arm surface, the rear chip arm surface, and the bottom surface of the chip groove; the two sides of the rear chip arm surface are smoothly connected to the rear chip arm surface and the bottom surface of the chip groove; Among them, one side of the front chip arm surface is connected to the main cutting edge, the side of the front chip arm surface away from the chip groove is a straight edge, and the width of the front chip arm surface gradually decreases and then gradually increases in the direction away from the main cutting edge and close to the main body; the rear chip arm surface is an arc convex surface and is tangent to the front chip arm surface.

4. The cutting insert according to claim 3, characterized in that The front chip arm surface is inclined in a direction away from the main cutting edge and away from the bottom surface, and the front cutting edge surface is inclined in a direction away from the main cutting edge and toward the bottom surface; Among them, the third angle between the front chip arm surface and the second target plane is a negative rake angle; the fourth angle between the front cutting edge surface and the second target plane is a positive rake angle, and the second target plane is a plane passing through the main cutting edge and parallel to the first direction.

5. The cutting insert according to claim 3, characterized in that The cutting portion further comprises two side relief surfaces arranged along a third direction, wherein the third direction is perpendicular to both the first direction and the second direction; The upper surface of the cutting portion further comprises: a turning chip breaker arm fixedly connected to a side of the anti-chip arm away from the chip groove, and a turning rake face distributed on a side of the turning chip breaker arm away from the chip groove, wherein a side cutting edge is formed at the intersection of the turning rake face and the side flank face, and the turning rake face is smoothly connected to the chip breaker face of the turning chip breaker arm; Wherein, the angle between the chip breaking surface of the turning chip breaker arm and the turning rake face is an obtuse angle.

6. The cutting insert according to claim 5, characterized in that The turning chip breaker arm comprises: a front turning chip breaker portion, a central turning chip breaker portion and a rear turning chip breaker portion arranged in sequence along the extending direction of the turning chip breaker arm, the front turning chip breaker portion is connected with the main cutting edge; the turning rake face comprises: a first sub-turning rake face corresponding to the front turning chip breaker portion, a second sub-turning rake face corresponding to the central turning chip breaker portion, and a third sub-turning rake face corresponding to the rear turning chip breaker portion; Among them, the width of the first sub-turning front cutting edge gradually decreases in the direction away from the main cutting edge and close to the main body; the width of the second sub-turning front cutting edge first gradually increases and then gradually decreases in the direction away from the main cutting edge and close to the main body; the width of the third sub-turning front cutting edge gradually increases in the direction away from the main cutting edge and close to the main body.

7. The cutting insert according to claim 6, characterized in that The width of the front cutting edge along the extension direction of the main cutting edge is W1, the width of the connecting section of the front chip arm surface and the main cutting edge along the extension direction of the main cutting edge is W2, and the width between the side of the front chip arm surface away from the chip groove and the side cutting edge along the extension direction of the main cutting edge is W3; the length of the front turning chip breaker along the extension direction of the side cutting edge is L2, the length of the central turning chip breaker along the extension direction of the side cutting edge is L3, and the length of the rear turning chip breaker along the extension direction of the side cutting edge is L4; Among them, 1.25W3≤L2≤2.5W3, 0.75(W1+2W2+2W3)-L2≤L3≤1.25(W1+2W2+2W3)-L2, 0.75L2≤L4≤2.5L2.

8. The cutting insert according to claim 5, characterized in that The length of the front cutting edge along the extension direction of the main cutting edge is W1, the width of the connection section between the front chip arm surface and the main cutting edge along the extension direction of the main cutting edge is W2, and the length between the side of the front chip arm surface away from the chip groove and the side cutting edge along the extension direction of the main cutting edge is W3; wherein, 0.3(W1+2W2+2W3)≤W1≤0.8(W1+2W2+2W3), 0.1(W1+2W2+2W3)≤W2≤0.35(W1+2W2+2W3), 0.1(W1+2W2+2W3)≤W3≤0.35(W1+2W2+2W3).

9. The cutting insert according to any one of claims 1 to 8, characterized in that: The upper surface of the cutting portion further comprises a coolant guide groove located on a side of the chip groove away from the main cutting edge, and the coolant guide groove is communicated with the chip groove.

10. A cutting tool, characterized in that: include: A tool body and a cutting insert according to any one of claims 1 to 9, wherein the cutting insert is mounted on the tool body.

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