Cutting insert and cutting tool

Abstract

The application discloses a cutting blade and a cutting tool, and belongs to the technical field of cutting tools. The cutting blade comprises a main body part and a cutting part. By arranging a first rake surface adjacent to a main cutting edge and a second rake surface adjacent to the first rake surface on the upper surface of the cutting part, when the cutting blade is fed in a first direction, the chip will flow through the first rake surface and then contact the second rake surface. Due to the arrangement of the inclination angles of the two rake surfaces towards the bottom surface, even in the working condition of small feed, the chip can develop along the first rake surface and naturally curl, and the edge strength of the cutting blade can be significantly increased. Generally, the inclination angle of the second rake surface is larger than that of the first rake surface, so that the chip has a smaller curling radius via the second rake surface, and it is easier to curl the chip. Therefore, in the case of increasing the edge strength by arranging the first rake surface, the chip winding on the workpiece or the blade is effectively avoided.

Description

Technical Field

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

[0002] With the steady development of the general machinery, automotive, and energy industries, the precision level of machined products is gradually improving. These industries mostly process heat-treated steel materials, which places higher demands on the chip removal capability and cutting edge stability of cutting inserts. On the one hand, it is necessary to ensure that chips are discharged stably as small and fine as possible or in a regularly curled shape during machining, avoiding chip entanglement on the workpiece or cutting insert, which would reduce the surface quality of the workpiece and cause abnormal chipping of the cutting insert due to chip interference. On the other hand, improving the cutting edge stability of the cutting inserts is an essential condition for achieving automated and efficient machining.

[0003] However, the cutting inserts in current cutting tools still provide relatively low machining quality for workpieces. Summary of the Invention

[0004] This application provides a cutting insert and a cutting tool. It can solve the problem of low workpiece machining quality caused by existing cutting inserts. The technical solution is as follows:

[0005] On one hand, a cutting insert is provided, the cutting insert comprising:

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

[0007] The cutting part has an upper surface and a bottom surface arranged along a second direction, and a flank face connecting the upper surface and the bottom surface. The intersection of the upper surface and the flank face forms the main cutting edge. The second direction is perpendicular to the first direction.

[0008] The upper surface of the cutting part includes: a first rake face, a second rake face, and a chip groove arranged adjacent to each other. The first rake face intersects with the main cutting edge. The second rake face is located on the side of the first rake face away from the main cutting edge. The chip groove may be located on the side of the second rake face away from the first rake face and adjacent to the second rake face.

[0009] Wherein, both the first rake face and the second rake face are inclined in a direction away from the main cutting edge and toward the bottom surface, the first included angle between the first rake face and the target plane is less than or equal to the second included angle between the second rake face and the target plane, and the target plane is the plane where the center line of the bottom surface is located.

[0010] Optionally, the range of the first included angle is 5 degrees to 10 degrees; and the range of the second included angle is 10 degrees to 15 degrees.

[0011] Optionally, the width of the orthographic projection of the first rake face onto the target plane along the first direction ranges from 0.1 mm to 0.15 mm.

[0012] Optionally, the cutting part further has two side relief cutting faces arranged along a third direction, and the intersection of the side relief cutting faces and the upper surface forms a side cutting edge, and the third direction is perpendicular to both the first direction and the second direction;

[0013] The upper surface of the cutting part further includes: a first side cutting surface and a second side cutting surface arranged adjacent to each other, the first side cutting surface intersecting with the side cutting edge, and the second side cutting surface located on the side of the first side cutting surface away from the side cutting edge;

[0014] Wherein, both the first side cutting face and the second side cutting face are inclined in a direction away from the side cutting edge and toward the bottom surface, and the third included angle between the first side cutting face and the target plane is smaller than the fourth included angle between the second side cutting face and the target plane.

[0015] Optionally, the range of the third included angle is 3 to 8 degrees; and the range of the fourth included angle is 10 to 15 degrees.

[0016] Optionally, the width of the orthographic projection of the first side blade onto the target plane along the third direction ranges from 0.15 mm to 0.2 mm.

[0017] Optionally, the cutting portion has two anti-chip portions located on the upper surface and extending along the first direction, the two anti-chip portions being located between the two side cutting edges, the first ends of the two anti-chip portions extending to the main cutting edge, the second ends of the two anti-chip portions being fixedly connected, and the two anti-chip portions forming the chip groove; at least a portion of the first rake face and at least a portion of the second rake face are both located between the two anti-chip portions;

[0018] The chip-removing portion has a first chip-removing surface, a first raised portion, a second chip-removing surface, and a second raised portion arranged sequentially and connected to each other along the extending direction of the chip-removing portion. The first chip-removing surface intersects with the main cutting edge, and the second raised portion is closer to the main body portion than the first raised portion.

[0019] Optionally, the width of the first anti-chip surface first increases and then decreases along the direction away from the main cutting edge.

[0020] Optionally, the first anti-chip surface includes: a smoothly transitioning first anti-chip plane area and a first anti-chip slope area, one side of the first anti-chip plane area intersects with the main cutting edge, and the side of the first anti-chip slope area away from the first anti-chip plane area intersects with the first raised portion.

[0021] The first anti-chip plane region is parallel to the target plane.

[0022] On the other hand, a cutting tool is provided, the cutting tool comprising:

[0023] The tool body and the cutting blade, wherein the cutting blade is mounted on the tool body and the cutting blade is any of the cutting blades given above.

[0024] The beneficial effects of the technical solutions provided in this application include at least the following:

[0025] A cutting insert may include: a main body and a cutting portion fixedly connected to the end of the main body. The upper surface of the cutting portion mainly serves to generate and remove chips. By providing a first rake face adjacent to the main cutting edge and a second rake face adjacent to the first rake face on the upper surface of the cutting portion, when the cutting insert is fed in a first direction, the chips generated by the workpiece will flow over the first rake face and then contact the second rake face. Due to the inclination angle of the first and second rake faces towards the bottom surface of the cutting portion, it can be ensured that even under small feed conditions, the chips can develop along the first rake face and naturally curl, and the cutting edge strength of the cutting insert can be significantly increased. Moreover, the inclination angle of the second rake face is usually larger than that of the first rake face, so that the chips have a smaller curl radius when passing through the second rake face, making it easier to curl the chips. Thus, while the setting of the first rake face increases the cutting edge strength, it also effectively avoids the undesirable phenomenon of chips wrapping around the workpiece or the cutting insert, causing a decrease in the surface quality of the workpiece and chip interference with the cutting insert leading to abnormal chipping of the cutting insert. This means that while ensuring the stability of the cutting edge of the cutting insert, it can significantly improve the surface finish of the workpiece, meeting the requirements of the modern machinery industry for precision surface quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a cutting blade provided in an embodiment of this application;

[0028] Figure 2 This is a top view of a cutting blade provided in an embodiment of this application;

[0029] Figure 3 yes Figure 2 Sectional view at A-A';

[0030] Figure 4 This is a cross-sectional view of a cutting part provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of another cutting blade provided in an embodiment of this application;

[0032] Figure 6 yes Figure 5 The top view of the cutting blade shown in the image;

[0033] Figure 7 yes Figure 6 Sectional view at B-B';

[0034] Figure 8 This is a side view of a cutting blade provided in an embodiment of this application;

[0035] Figure 9 yes Figure 6 The cutting blade is shown in a cross-sectional view at C-C';

[0036] Figure 10 This is a schematic diagram of the structure of another cutting blade provided in the embodiments of this application.

[0037] The components include: cutting insert 000, main body 100, upper positioning groove surface 101, lower positioning groove surface 102, cutting part 200, upper surface A1, bottom surface A2, flank face A3, main cutting edge R1, first rake face A11, second rake face A12, first included angle α1, second included angle α2, target plane B, side flank face A4, side cutting edge R2, first side face A13, second side face A14, third included angle β1, fourth included angle β2, corner cutting edge R3, first corner surface A15, second corner surface A16, chip removal part 201, first chip removal surface 201a, first raised part 201b, second chip removal surface 201c, second raised part 201d, first chip removal plane area a1, first chip removal slope area a2, second chip removal plane area b1, and second chip removal slope area b2.

[0038] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a cutting blade provided in an embodiment of this application. Figure 2 This is a top view of a cutting blade provided in an embodiment of this application. Figure 3 yes Figure 2 A cross-sectional view at A-A'. The cutting insert 000 may include: a main body 100, and a cutting portion 200 fixedly connected to the end of the main body 100. The cutting portion 200 and the main body 100 may be arranged along a first direction f1. Here, the number of cutting portions 200 in the cutting insert 000 may be one or two, and this application embodiment does not specifically limit this.

[0041] The cutting portion 200 in the cutting insert 000 may have an upper surface A1 and a bottom surface A2 arranged along a second direction f2, and a flank face A3 connecting the upper surface A1 and the bottom surface A2 of the cutting portion 200. A main cutting edge R1 may be formed at the intersection of the upper surface A1 and the flank face A3 of the cutting portion 200. Here, the first direction f1 may be perpendicular to the second direction f2; 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 face A3 of the cutting portion 200 may be the side of the cutting portion 200 facing away from the main body 100.

[0042] The upper surface A1 of the cutting portion 200 in the cutting insert 000 may include: a first rake face A11, a second rake face A12, and a chip groove C arranged adjacent to each other. The first rake face A11 of the cutting portion 200 may intersect with the main cutting edge R1, and the second rake face A12 of the cutting portion 200 may be located on the side of the first rake face A11 that is away from the main cutting edge R1. The chip groove C may be located on the side of the second rake face A12 that is away from the first rake face A11 and adjacent to the second rake face A12. Here, chips from the two rake faces can enter the chip groove C.

[0043] In this design, both the first rake face A11 and the second rake face A12 of the cutting part 200 can be inclined in a direction away from the main cutting edge R1 and towards the bottom surface A2 of the cutting part 200. The first included angle α1 between the first rake face A11 of the cutting part 200 and the target plane B can be less than or equal to the second included angle α2 between the second rake face A12 of the cutting part 200 and the target plane B. Here, the target plane B can be the plane containing the centerline of the bottom surface A2 of the cutting part 200, and the target plane B extends along the first direction f1.

[0044] In this embodiment, the upper surface A1 of the cutting part 200 mainly serves as the chip-producing and chip-removing surface. By providing a first rake face A11 adjacent to the main cutting edge R1 and a second rake face A12 adjacent to the first rake face A11 on the upper surface A1 of the cutting part 200, when the cutting insert 000 feeds along the first direction f1, the chips generated by the workpiece will flow over the first rake face A11 and then contact the second rake face A12. Due to the inclination angle of the first rake face A11 and the second rake face A12 toward the bottom surface A2 of the cutting part 200, it can be ensured that even under the condition of a small feed, the chips can develop along the first rake face A11 and naturally curl, and the cutting edge strength of the cutting insert can be significantly increased. Furthermore, the inclination angle of the second rake face A12 is typically larger than that of the first rake face A11. This results in a smaller curl radius for the chips as they pass through the second rake face A12, making chip curling easier. Thus, while the setting of the first rake face A11 increases the cutting edge strength, it also effectively prevents chips from wrapping around the workpiece or the cutting insert 000, thus avoiding the adverse phenomena of reduced workpiece surface quality and chip interference with the cutting insert 000 leading to abnormal breakage of the cutting insert. In other words, while ensuring the cutting edge stability of the cutting insert 000, it significantly improves the surface finish of the workpiece, meeting the requirements of modern machinery industries for precision-machined surface quality.

[0045] Optional, please refer to Figure 4 , Figure 4 This is a cross-sectional view of a cutting part provided in an embodiment of this application. The first included angle α1 between the first rake face A11 of the cutting part 200 and the target plane B can range from 5 degrees to 10 degrees. The second included angle α2 between the second rake face A12 of the cutting part 200 and the target plane B can range from 10 degrees to 15 degrees. In this case, by tilting the first rake face A11 of the cutting part 200 at a certain angle away from the main cutting edge R1 and towards the bottom surface A2 of the cutting part 200, and tilting the second rake face A12 of the cutting part 200 at a certain angle away from the main cutting edge R1 and towards the bottom surface A2 of the cutting part 200, and setting the tilt angle of the second rake face A12 to be greater than the tilt angle of the first rake face A11, the chip-rolling effect of the cutting insert 000 can be effectively guaranteed. For example, the angle value of the first included angle α1 can be 5 degrees, 7 degrees or 9 degrees, etc., and the angle value of the second included angle α2 can be 10 degrees, 12 degrees or 15 degrees, etc. The embodiments of this application do not make specific limitations on this.

[0046] In the embodiments of this application, such as Figure 4As shown, the width W1 of the orthographic projection of the first rake face A11 of the cutting part 200 onto the target plane B along the first direction f1 can range from 0.1 mm to 0.15 mm. In this case, by setting the width of the orthographic projection of the first rake face A11 of the cutting part 200 onto the target plane B to 0.1 mm to 0.15 mm, the overall thickness of the cutting edge R1 of the main cutting edge of the cutting part 200 can be increased, significantly improving the stability of the cutting edge. For example, the width of the orthographic projection of the first rake face A11 of the cutting part 200 onto the target plane can be 0.1 mm, 0.12 mm, or 0.15 mm; this embodiment does not specifically limit this.

[0047] Optional, please refer to Figure 5 , Figure 6 and Figure 7 , Figure 5 This is a schematic diagram of another cutting blade provided in an embodiment of this application. Figure 6 yes Figure 5 The top view of the cutting blade shown in the image. Figure 7 yes Figure 6 A cross-sectional view at B-B'. The cutting portion 200 in the cutting insert 000 may also have two side relief faces A4 arranged along a third direction f3. The intersection of the side relief faces A4 of the cutting portion 200 and the upper surface A1 of the cutting portion 200 can form a side cutting edge R2. The third direction f3 may be perpendicular to both the first direction f1 and the second direction f2. For example, the third direction f3 may be the Y-axis direction. The upper surface A1 of the cutting portion 200 in the cutting insert 000 may also include: a first side face A13 and a second side face A14 arranged adjacent to each other. The first side face A13 of the cutting portion 200 may intersect with the side cutting edge R2 of the cutting portion 200, and the second side face A14 of the cutting portion 200 may be located on the side of the first side face A13 away from the side cutting edge R2. The first side facet A13 and the second side facet A14 of the cutting part 200 can both be inclined in a direction away from the side cutting edge R2 and towards the bottom surface A2 of the cutting part 200. The third included angle β1 between the first side facet A13 of the cutting part 200 and the target plane B can be smaller than the fourth included angle β2 between the second side facet A14 of the cutting part 200 and the target plane B. Here, the upper surface A1 of the cutting part 200 includes two sets of first side facets A13 and second side facets A14 corresponding to the two side cutting edges R2, respectively.

[0048] In this configuration, by providing a first side facet A13 adjacent to the side cutting edge R2 on the upper surface A1 of the cutting section 200, and a second side facet A14 adjacent to the first side facet A13, when the cutting insert 000 feeds along the third direction f3, the chips generated by the workpiece flow over the first side facet A13 and then contact the second side facet A14. Due to the inclination angles of the first side facet A13 and the second side facet A14 toward the bottom surface A2 of the cutting section 200, it is ensured that even under small feed conditions, the chips can develop along the first side facet A13 and naturally curl. Furthermore, the inclination angle of the second side facet A14 is usually larger than that of the first side facet A13, resulting in a smaller curl radius for the chips passing through the second side facet A14, making chip breaking easier. This effectively prevents chips from entangled on the workpiece or the cutting insert, thus avoiding a decrease in workpiece surface quality and chip interference with the cutting insert leading to abnormal breakage of the cutting insert 000. As can be seen from the above, regardless of whether it is for turning or grooving, the cutting insert 000 provided in this application embodiment has double rake angles in both cutting directions (X-axis direction and Y-axis direction). The design of double rake angles can not only ensure chip breaking ability, but also significantly improve the stability of the cutting edge.

[0049] In the embodiments of this application, such as Figure 6 and Figure 7 As shown, the range of the third included angle β1 between the first side face A13 of the cutting part 200 and the target plane B can be 3 to 8 degrees. The range of the fourth included angle β2 between the second side face A14 of the cutting part 200 and the target plane B can be 10 to 15 degrees. In this case, by tilting the first side face A13 of the cutting part 200 at a certain angle away from the side cutting edge R2 and towards the bottom surface of the cutting part 200, and tilting the second side face A14 of the cutting part 200 at a certain angle away from the side cutting edge R2 and towards the bottom surface of the cutting part 200, and setting the tilt angle of the second side face A14 to be greater than the tilt angle of the first side face A13, the chip-breaking effect of the cutting insert 000 can be effectively guaranteed. For example, the third included angle β1 can be 3 degrees, 5 degrees, or 8 degrees, etc., and the fourth included angle β2 can be 10 degrees, 12 degrees, or 15 degrees, etc., and this application embodiment does not specifically limit this.

[0050] Optional, such as Figure 6 and Figure 7As shown, the width W2 of the orthographic projection of the first side face A13 of the cutting part 200 onto the target plane B along the third direction f3 can range from 0.15 mm to 0.2 mm. In this case, by setting the width W2 of the orthographic projection of the first side face A13 of the cutting part 200 onto the target plane B to 0.15 mm to 0.2 mm, the overall thickness of the cutting edge R2 of the side cutting edge of the cutting part 200 can be increased, significantly improving the stability of the cutting edge. For example, the width W2 of the orthographic projection of the first side face A13 of the cutting part 200 onto the target plane B can be 0.15 mm, 0.17 mm, or 0.2 mm; this embodiment does not impose a specific limitation on this.

[0051] In this application, as Figure 6 and Figure 7 As shown, the maximum width of the orthographic projection of the cutting part 200 on the target plane B along the third direction f3 is W3. At a certain distance W4 from the main cutting edge R1, the area of ​​the first side face A13 gradually increases in the direction away from the main cutting edge R1. In this way, without affecting the normal chip-rolling capability of the cutting insert in the Y-axis direction, the overall edge strength of the side cutting edge R2 can be effectively improved. For example, this certain distance W4 can be two-thirds of the maximum width W3 of the orthographic projection of the cutting part 200 on the target plane B along the third direction f3.

[0052] It should be noted that, as Figure 6 As shown, to prevent the portion of the cutting insert 000 other than the main cutting edge R1 from contacting the inner wall of the groove cut into the workpiece during machining, the width of the cutting portion 200 of the cutting insert 000 gradually decreases along the direction closer to the main body. Here, the width of the cutting portion 200 refers to the width of the cutting portion 200 along the third direction f3.

[0053] Please refer to the following in this application: Figure 5 , Figure 6 and Figure 8 , Figure 8This is a side view of a cutting insert provided in an embodiment of this application. The intersection of the flank face A3 and the side flank face A4 of the cutting portion 200 forms a corner cutting edge R3 adjacent to the main cutting edge R1 and the side cutting edge R2, respectively. The upper surface A1 of the cutting portion 200 may further include: a first corner surface A15 adjacent to the first rake face A11 and the first side cutting edge A13, and a second corner surface A16 adjacent to the second rake face A12 and the second side cutting edge A14. Thus, the first corner surface A15 can be adjacent to the corner cutting edge R3, the first rake face A11, and the first side cutting edge A13. The first corner surface A15 at the corner cutting edge R3 can effectively thicken the corner cutting edge R3, effectively improving the edge strength of the corner cutting edge R3, thereby improving the overall edge stability. It should be noted that during the cutting process of the cutting insert 000, regardless of whether the machining is performed along the X-axis or the Y-axis, the corner cutting edge R3 will participate in the machining. At the same time, the corner cutting edge R3 is also the weakest. The cutting edge damage of the cutting insert 000 usually first appears on the corner cutting edge R3.

[0054] It should be noted that, since the angles and areas of the first rake face A11 and the first side face A13 are different, the first corner face A15 can be located at the transition position between the two. That is, the angle and area of ​​the first corner face A15 will change accordingly with the setting of the first rake face A11 and the first side face A13. Similarly, since the angles and areas of the second rake face A12 and the second side face A14 are different, the second corner face A16 can be located at the transition position between the two. That is, the angle and area of ​​the second corner face A16 will change accordingly with the setting of the second rake face A12 and the second side face A14.

[0055] In the embodiments of this application, please refer to Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, Figure 9 yes Figure 6The cutting insert is shown in a cross-sectional view at C-C'. The cutting section 200 may have two anti-chip sections 201 located on the upper surface A1 of the cutting section 200 and extending along a first direction f1. The two anti-chip sections 201 are located between two side cutting edges R2. The first ends of both anti-chip sections 201 extend to the main cutting edge R1 of the cutting section 200 and have a gap. The second ends of the two anti-chip sections 201 may be fixedly connected, and a chip groove C may be formed between the two anti-chip sections 201. That is, the second end of each anti-chip section 201 moves towards the center of the cutting section 200 in a direction away from the main cutting edge R1 and the side cutting edges R2. At least a portion of the first rake face A11 and at least a portion of the second rake face A12 may be located between the two anti-chip sections 201. The chip-removing portion 201 may have a first chip-removing surface 201a, a first raised portion 201b, a second chip-removing surface 201c, and a second raised portion 201d arranged sequentially and interconnected along the extending direction of the chip-removing portion 201. The first chip-removing surface 201a may intersect with the main cutting edge R1, and the second raised portion 201d may be closer to the main body portion 100 than the first raised portion 201b. It should be noted that the first chip-removing surface 201a is further away from the bottom surface A2 of the cutting portion 200 than the first rake face A11 and the second rake face A12.

[0056] In this configuration, by providing a chip-repelling section 201 on the upper surface A1 of the cutting section 200, the chip-repelling section 201 can effectively prevent chips from breaking during the machining process in both directions, thus ensuring the chip-breaking performance of the cutting insert 000. Furthermore, since the first chip-repelling surface 201a is further away from the bottom surface A2 of the cutting section 200 than the first rake face A11 and the second rake face A12, the chips will have a raised shape at the position of the first chip-repelling surface 201a during the X-axis feed, resulting in a wavy chip shape that improves chip rigidity and chip removal. Moreover, the first chip-repelling surface 201a of the two chip-repelling sections 201 moves away from the main cutting edge R1 and closer to the center of the cutting section 200, narrowing the chip area and preventing chips from interfering with the machined surface and causing a deterioration in the surface quality.

[0057] Furthermore, the two first raised portions 201b are located at the highest points of the two first anti-chip surfaces 201a, respectively. They can support the chips flowing through the first anti-chip surfaces 201a, guide chip discharge, and prevent chip breakage, thus achieving the effect of chip breaking. The second anti-chip surface 201c of the anti-chip portion 201 gradually moves away from the side cutting edge R2 as it moves away from the first raised portion 201b. In this way, when facing large depth of cut machining in the Y-axis direction, it can provide a larger chip space, suppress chip blockage in the machining groove, and delay the contact time between the chip and the anti-chip portion 201, reducing the compression of the side cutting edge R2 during chip curling, and improving the edge stability of the side cutting edge R2 under large depth of cut machining conditions. The second raised portion 201d is located at the highest point of the second anti-chip surface 201c. When the chip cannot be broken by the first raised portion 201b and flows through the second anti-chip surface 201c to the second raised portion 201d, the second raised portion 201d also has a chip-rejecting effect, thus playing the role of chip breaking.

[0058] It should be noted that the two chip-removing parts 201 can be located between the two second side faces A14, and the two chip-removing parts 201 are symmetrically distributed with respect to the first direction f1, and a chip-breaking groove is formed between the two chip-removing parts 201. It should also be noted that the structure and working principle of the two chip-removing parts 201 are the same, and will not be repeated here.

[0059] Optionally, the width of the first anti-chip surface 201a of the chip-removing section 201 can first increase and then decrease along the direction away from the main cutting edge R1 of the cutting section 200, that is, the first anti-chip surface 201a exhibits a trend of first widening and then narrowing. In this case, by setting the first anti-chip surface 201a to first widen and then narrow along the direction away from the main cutting edge R1, the chip-removing section 201 can intervene in the chips earlier and achieve the purpose of chip breaking when the cutting insert 000 is facing a small depth of cut in the Y-axis direction.

[0060] In this application, the first anti-chip surface 201a of the anti-chip section 201 may include a smoothly transitioned first anti-chip plane region a1 and a first anti-chip inclined region a2. One side of the first anti-chip plane region a1 may intersect with the main cutting edge R1 of the cutting section 200, and the side of the first anti-chip inclined region a2 away from the first anti-chip plane region a1 may intersect with the first raised portion 201b. The first anti-chip plane region a1 may be parallel to the target plane B. In this case, by providing the first anti-chip plane region a1 in the first anti-chip surface 201a, the strength of the portion of the main cutting edge R1 near the corner cutting edge R3 can be strengthened. The first anti-chip inclined region a2 slopes upwards as it leaves the first anti-chip plane region a1. When the chip contacts the first anti-chip inclined region a2, the chip is further compressed, further reducing the chip curl radius.

[0061] It should be noted that when the upper surface A1 of the cutting part 200 includes a corner cutting edge R3, the first chip-reversing plane area a1 of the first chip-reversing surface 201a is arranged adjacent to the corner cutting edge R3. In this way, the first chip-reversing plane area a1 in the first chip-reversing surface 201a can also strengthen the corner cutting edge R3 and the main cutting edge R1 adjacent to the corner cutting edge R3, and improve the stability of the cutting edge.

[0062] For example, the second anti-chip surface 201c may include: a smoothly transitioned second anti-chip plane region b1 and a second anti-chip ramp region b2. One side of the second anti-chip plane region b1 may intersect with the first raised portion 201b, and the side of the second anti-chip ramp region b2 opposite to the second anti-chip plane region b1 may intersect with the second raised portion 201d. The second anti-chip plane region b1 may be parallel to the target plane B. Thus, when chips cannot be broken at the first raised portion 201b and flow through the second anti-chip surface 201c to the second raised portion 201d, the second raised portion 201d also has a chip-rejecting effect, thus achieving chip breaking.

[0063] In summary, this application provides a cutting insert 000, which may include a main body 100 and a cutting part 200 fixedly connected to the end of the main body 100. The upper surface A1 of the cutting part 200 mainly serves the function of chip generation and chip removal. By providing a first rake face A11 adjacent to the main cutting edge R1 and a second rake face A12 adjacent to the first rake face A11 on the upper surface A1 of the cutting part 200, when the cutting insert 000 is fed along the first direction f1, the chips generated by the workpiece will flow over the first rake face A11 and then contact the second rake face A12. Due to the inclination angle of the first rake face A11 and the second rake face A12 toward the bottom surface A2 of the cutting part 200, it can be ensured that even under small feed conditions, the chips can develop along the first rake face A11 and naturally curl, and the cutting edge strength of the cutting insert can be significantly increased. Furthermore, the inclination angle of the second rake face A12 is typically larger than that of the first rake face A11. This results in a smaller curl radius for the chips as they pass through the second rake face A12, making chip curling easier. Thus, while the setting of the first rake face A11 increases the cutting edge strength, it also effectively prevents chips from wrapping around the workpiece or cutting insert 000, thus avoiding reduced workpiece surface quality and chip interference with the cutting insert leading to abnormal breakage of the cutting insert 000. In other words, while ensuring the cutting edge stability of the cutting insert, it significantly improves the surface finish of the workpiece, meeting the requirements of modern machinery industries for precision-machined surface quality.

[0064] This application also provides a cutting tool, which may include a tool body (not shown in the figure) and a cutting insert 000. The cutting insert 000 is mounted on the tool body, that is, by mounting the cutting insert 000 on the tool body, the rotation or movement of the tool body drives the cutting of the cutting insert. The mounting structure between the cutting insert and the tool body is not an improvement of this application; those skilled in the art can assemble the cutting insert and the tool body according to existing mounting methods, and will not be described in detail here. For examples, please refer to... Figure 10 , Figure 10 This is a schematic diagram of another type of cutting insert provided in the embodiments of this application. The main body 100 of the cutting insert 000 may have an upper positioning groove surface 101 and a lower positioning groove surface 102 disposed opposite to each other along the second direction f2. A portion of the lower positioning groove surface 102 may be distributed on the bottom surface A2 of the cutting part 200. The cutting insert 000 and the tool body can be positioned and installed through the upper positioning groove surface 101 and the lower positioning groove surface 102 in the main body 100.

[0065] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0066] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0067] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting blade, characterized in that, include: The main body portion and the cutting portion fixedly connected to the end of the main body portion, wherein the cutting portion and the main body portion are arranged along a first direction; The cutting part has an upper surface and a bottom surface arranged along a second direction, and a flank face connecting the upper surface and the bottom surface. The intersection of the upper surface and the flank face forms the main cutting edge. The second direction is perpendicular to the first direction. The upper surface of the cutting part includes: a first rake face, a second rake face, and a chip groove arranged adjacent to each other. The first rake face intersects with the main cutting edge. The second rake face is located on the side of the first rake face away from the main cutting edge. The chip groove is located on the side of the second rake face away from the first rake face and is adjacent to the second rake face. Wherein, both the first rake face and the second rake face are inclined in a direction away from the main cutting edge and toward the bottom surface, the first included angle between the first rake face and the target plane is smaller than the second included angle between the second rake face and the target plane, and the target plane is the plane where the center line of the bottom surface is located; The cutting part also has two side relief cutting surfaces arranged along a third direction, and the intersection of the side relief cutting surfaces and the upper surface forms a side cutting edge. The third direction is perpendicular to both the first direction and the second direction. The upper surface of the cutting part further includes: a first side cutting surface and a second side cutting surface arranged adjacent to each other, the first side cutting surface intersecting with the side cutting edge, and the second side cutting surface located on the side of the first side cutting surface away from the side cutting edge; Wherein, both the first side cutting face and the second side cutting face are inclined in a direction away from the side cutting edge and toward the bottom surface, and the third included angle between the first side cutting face and the target plane is smaller than the fourth included angle between the second side cutting face and the target plane.

2. The cutting blade according to claim 1, characterized in that, The first included angle ranges from 5 degrees to 10 degrees; the second included angle ranges from 10 degrees to 15 degrees.

3. The cutting blade according to claim 1, characterized in that, The width of the orthographic projection of the first rake face onto the target plane along the first direction ranges from 0.1 mm to 0.15 mm.

4. The cutting blade according to claim 1, characterized in that, The range of the third included angle is 3 to 8 degrees; the range of the fourth included angle is 10 to 15 degrees.

5. The cutting blade according to claim 1, characterized in that, The width of the orthographic projection of the first side blade onto the target plane along the third direction ranges from 0.15 mm to 0.2 mm.

6. The cutting blade according to claim 1, characterized in that, The cutting portion has two anti-chip portions located on the upper surface and extending along the first direction. The two anti-chip portions are located between the two side cutting edges. The first ends of the two anti-chip portions extend to the main cutting edge. The second ends of the two anti-chip portions are fixedly connected. The two anti-chip portions form the chip groove. At least a portion of the first rake face and at least a portion of the second rake face are located between the two anti-chip portions. The chip-removing portion has a first chip-removing surface, a first raised portion, a second chip-removing surface, and a second raised portion arranged sequentially and connected to each other along the extending direction of the chip-removing portion. The first chip-removing surface intersects with the main cutting edge, and the second raised portion is closer to the main body portion than the first raised portion.

7. The cutting blade according to claim 6, characterized in that, The width of the first anti-chip surface first increases and then decreases along the direction away from the main cutting edge.

8. The cutting blade according to claim 6, characterized in that, The first anti-chip surface includes: a smoothly transitioning first anti-chip plane area and a first anti-chip slope area, one side of the first anti-chip plane area intersects with the main cutting edge, and the side of the first anti-chip slope area away from the first anti-chip plane area intersects with the first raised portion. The first anti-chip plane region is parallel to the target plane.

9. A cutting tool, characterized in that, include: The tool body and the cutting insert as described in any one of claims 1 to 8, wherein the cutting insert is mounted on the tool body.

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