Cutting inserts and cutting tools

Abstract

The present invention discloses a cutting blade and a cutting tool, which relate to the field of cutting blades. The cutting blade comprises: a cutting portion and a blade body, the blade body having two mounting end faces that are opposite and spaced apart in a first direction, the blade body also having a connecting side face, the connecting side face being located between the two mounting end faces, and the connecting side face being connected to both mounting end faces, at least one mounting end face being provided with a cutting portion, the cutting portion being located at the edge of the blade body, wherein the connecting side face comprises two first side faces and two second side faces, the maximum spacing distance between the two first side faces is L1, the maximum spacing distance between the two second side faces is L2, and the relationship is satisfied: L2≤L1≤2L2. The cutting blade according to the embodiment of the present invention can improve the stability of the cutting blade and the cutting tool, can reduce the magnitude of the cutting force acting on the cutting portion, improve the surface roughness of the workpiece being processed, and extend the service life of the cutting blade.

Description

Technical Field

[0001] The present invention relates to the field of cutting inserts, in particular to a cutting insert and a cutting tool having the cutting insert. Background Art

[0002] In the related technology, in high-feed cutting processing, a cutting force acting in the direction of the cutting tool spindle will be generated during the cutting process. The greater the feed rate of the cutting tool, the greater the cutting force on the cutting edge of the cutting blade, causing the cutting tool to produce high-frequency vibrations, reducing the service life of the cutting tool and the surface roughness of the workpiece being processed. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a cutting insert that can improve the stability of the cutting insert and the cutting tool, can reduce the magnitude of the cutting force acting on the cutting part, improve the surface roughness of the workpiece being processed, and increase the life of the cutting insert.

[0004] The present invention further provides a cutting tool using the cutting insert.

[0005] According to the first aspect of the present invention, a cutting blade embodiment comprises: a cutting portion and a blade body, the blade body having two mounting end faces that are opposite and spaced apart along a first direction, the blade body also having a connecting side face, the connecting side face being located between the two mounting end faces, and the connecting side face being connected to both mounting end faces, at least one mounting end face being provided with the cutting portion, the cutting portion being located at an edge position of the blade body, wherein the connecting side face comprises two first side faces and two second side faces, the two first side faces being opposite and spaced apart along a second direction, the two second side faces being opposite and spaced apart along a third direction, the maximum spacing distance between the two first side faces being L1, the maximum spacing distance between the two second side faces being L2, satisfying the relationship: L2≤L1≤2L2, the first direction, the second direction and the third direction being perpendicular to each other.

[0006] According to the cutting blade of the embodiment of the present invention, the cutting blade can better realize high feed processing, can improve the stability of the cutting blade and the cutting tool, the cutting blade can be stably installed on the cutting tool, can reduce the size of the cutting force acting on the cutting part, improve the surface roughness of the workpiece being processed, and extend the service life of the cutting blade.

[0007] According to some embodiments of the present invention, along the first direction, the maximum spacing distance between the end of the cutting portion away from the corresponding mounting end face and the corresponding mounting end face is H1, the cutting portion is located at the edge of the blade body, the cutting portion intersects with the corresponding first side face, and a cutting edge is formed at the end of the cutting portion away from the corresponding mounting end face, and the cutting edge extends along the edge of the corresponding first side face. The blade body has a center plane, which is perpendicular to the third direction. The center of the blade body is located in the center plane, and the spacing distance from the intersection of the center plane and the cutting edge to the corresponding mounting end face is H2, satisfying the relationship: H2

[0008] According to some embodiments of the present invention, 1.5H2≤H1≤2.5H2.

[0009] According to some embodiments of the present invention, the cutting edge includes a first corner cutting edge, a main cutting edge, a second corner cutting edge, a secondary cutting edge and a third corner cutting edge connected in sequence, and the second corner cutting edge is arc-shaped.

[0010] According to some embodiments of the present invention, the second corner cutting edge is in an arc shape.

[0011] According to some embodiments of the present invention, the center plane intersects with the second corner cutting edge, and along the third direction, the interval distance between the intersection of the center plane and the second corner cutting edge and the main cutting edge is D1, and the width of the main cutting edge is D2, satisfying the relationship: D2<D1.

[0012] According to some embodiments of the present invention, the relationship is satisfied: 0.5 mm ≤ D1 ≤ 5 mm.

[0013] According to some embodiments of the present invention, the blade body has a central axis extending along the first direction, the spacing distance between the central axis of the blade body and the straight line tangent to the first corner cutting edge is L3, the spacing distance between the central axis of the blade body and the straight line tangent to the second corner cutting edge is L4, 0.8≤L3 / L4≤1.2.

[0014] According to some embodiments of the present invention, each of the mounting end faces is provided with a plurality of the cutting portions, and the plurality of the cutting portions on the same mounting end face are symmetrical about the central axis of the blade body.

[0015] According to some embodiments of the present invention, the connecting side surface is perpendicular to both of the two mounting end surfaces.

[0016] A cutting tool according to an embodiment of the second aspect of the present invention comprises a tool body and the cutting blade described in the above embodiment, wherein the cutting blade is fixed to the tool body. ​

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a cutting insert according to an embodiment of the present invention;

[0020] Figure 2 is a top view of a cutting insert according to an embodiment of the present application;

[0021] Figure 3 is a side view of a cutting insert according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a knife body according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of a cutting tool according to an embodiment of the present application.

[0024] Reference numerals:

[0025] Cutting tool 100,

[0026] Cutting blade 1,

[0027] Cutting portion 10, cutting edge 11, first corner cutting edge 111, main cutting edge 112, second corner cutting edge 113, auxiliary cutting edge 114, third corner cutting edge 115,

[0028] The blade body 12, the mounting end surface 121, the connecting side surface 122, the first side surface 1221, the second side surface 1222, the chip removal groove 123, the first assembly hole 124,

[0029] Center plane 13,

[0030] The blade body 2 , the blade seat 21 , the bottom placement surface 22 , the first mounting hole 221 , the main side placement surface 23 , and the secondary side placement surface 24 . DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] Reference below Figure 1-Figure 5A cutting insert 1 according to an embodiment of the present invention is described, and the cutting insert 1 is fixed on a cutting tool 100 .

[0033] According to the first embodiment of the present invention, the cutting insert 1 is as follows: Figure 1 and Figure 2 As shown, the cutting blade 1 may include: a cutting portion 10 and a blade body 12, the blade body 12 having two mounting end faces 121 that are opposite and spaced apart along a first direction, the blade body 12 also having a connecting side face 122, the connecting side face 122 being located between the two mounting end faces 121, and the connecting side face 122 being connected to both mounting end faces 121, at least one mounting end face 121 being provided with a cutting portion 10, the cutting portion 10 being located at an edge position of the blade body 12, wherein the connecting side face 122 includes two first side faces 1221 and two second side faces 1222, the two first side faces 1221 being opposite and spaced apart along a second direction, the two second side faces 1222 being opposite and spaced apart along a third direction, the maximum spacing distance between the two first side faces 1221 being L1, the maximum spacing distance between the two second side faces 1222 being L2, satisfying the relationship: L2≤L1≤2L2, the first direction, the second direction and the third direction being perpendicular to each other.

[0034] It should be noted that in the relevant technology, in high-feed cutting processing, a cutting force acting in the direction of the cutting tool spindle will be generated during the cutting process. The greater the feed rate of the cutting tool, the greater the cutting force on the cutting edge of the cutting blade, causing the cutting tool to produce high-frequency vibrations, reducing the service life of the cutting tool and the surface roughness of the workpiece being processed.

[0035] Based on this, the embodiment of the present application proposes a cutting blade 1, which may include: a cutting portion 10 and a blade body 12, wherein the cutting portion 10 can cut a workpiece during cutting, the cutting portion 10 is arranged on the blade body 12, and the blade body 12 has two mounting end faces 121 that are opposite and spaced apart along a first direction. Figure 1 When setting the direction, the first direction can be Figure 1In the Z direction, the blade body 12 can realize the positioning and installation of the cutting blade 1 through the mounting end face 121. The blade body 12 also has a connecting side surface 122, and the connecting side surface 122 is located between the two mounting end faces 121, and the connecting side surface 122 is connected between the two mounting end faces 121. The connecting side surface 122 can be integrally formed with the two mounting end faces 121. At least one mounting end face 121 is provided with a cutting portion 10, one of the two mounting end faces 121 can be provided with a cutting portion 10, and both mounting end faces 121 can also be provided with a cutting portion 10. This application takes the example that both mounting end faces 121 are provided with a cutting portion 10. As an example, both mounting end faces 121 are provided with a cutting portion 10, and each mounting end face 121 is provided with two cutting portions 10 that are opposite and spaced apart along the second direction. The cutting portion 10 is located at the edge of the blade body 12, so that the cutting portion 10 can act on the workpiece, which is beneficial to improving the cutting efficiency of the cutting blade 1. The cutting portion 10 is provided on both mounting end faces 121, so that the cutting blade 1 can achieve double-sided cutting, which is beneficial to improving the practicality of the cutting blade 1.

[0036] The connecting side surface 122 includes two first side surfaces 1221 and two second side surfaces 1222. The two first side surfaces 1221 are opposite to each other and spaced apart along the second direction. Figure 1 When setting the direction, the second direction can be Figure 1 The two second side surfaces 1222 are opposite and spaced apart along the third direction. Figure 1 When setting the direction, the third direction can be Figure 1 The first direction, the second direction and the third direction are perpendicular to each other. Figure 2 As shown, the maximum spacing distance between the two first side surfaces 1221 is greater than or equal to the maximum spacing distance between the two second side surfaces 1222. The maximum spacing distance between the two first side surfaces 1221 is L1, and the maximum spacing distance between the two second side surfaces 1222 is L2. Exemplarily, the maximum spacing distance between the two first side surfaces 1221 can be L2, 1.3L2, 1.8L2, 2L2, etc. The maximum spacing distance between the two first side surfaces 1221 can be between L2 and 2L2. Any value, including the endpoint value, is the optional maximum spacing distance between the two first side surfaces 1221 of the present invention.

[0037] If the maximum spacing distance between the two first side surfaces 1221 is less than L2, the support area of ​​the cutting tool 100 for the cutting blade 1 will be reduced, affecting the support effect of the cutting tool 100 on the cutting blade 1, affecting the stability of the cutting blade 1 installed on the cutting tool 100, and further affecting the stability of the cutting blade 1 during cutting; if the maximum spacing distance between the two first side surfaces 1221 is greater than 2L2, the cutting force on the cutting portion 10 during cutting is large, making the cutting tool 100 unstable, and affecting the surface roughness of the workpiece. Therefore, when the maximum spacing distance between the two first side surfaces 1221 is within the range of L2 to 2L2, the cutting tool 100 can achieve a stable support effect for the cutting blade 1, so that the cutting blade 1 can be stably installed on the cutting tool 100, and the size of the cutting force acting on the cutting portion 10 can be reduced, which is beneficial to improving the stability of the cutting blade 1 and the cutting tool 100, so that the surface of the processed workpiece can achieve better surface roughness, and prolong the service life of the cutting blade 1. Furthermore, the minimum spacing distance between the two first side surfaces 1221 may be greater than or equal to the minimum spacing distance between the two second side surfaces 1222 , so that the cutting insert 1 is more stably mounted on the cutting tool 100 .

[0038] In the embodiment of the present invention, the cutting blade 1 can better realize high feed processing, can improve the stability of the cutting blade 1 and the cutting tool 100, the cutting blade 1 can be firmly installed on the cutting tool 100, can reduce the magnitude of the cutting force acting on the cutting part 10, improve the surface roughness of the workpiece being processed, and extend the service life of the cutting blade 1.

[0039] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, along the first direction, the maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 is H1, the cutting portion 10 is located at the edge of the blade body 12, the cutting portion 10 intersects with the corresponding first side surface 1221, and the end of the cutting portion 10 away from the corresponding mounting end face 121 is formed with a cutting edge 11, and the cutting edge 11 extends along the edge of the corresponding first side surface 1221. The blade body 12 has a center plane 13, and the center plane 13 is perpendicular to the third direction. The center of the blade body 12 is located at the center plane 13, and the spacing distance from the intersection of the center plane 13 and the cutting edge 11 to the corresponding mounting end face 121 is H2, satisfying the relationship: H2

[0040] ​Along the first direction, the maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 is H1, the cutting portion 10 protrudes toward the outside of the blade body 12 relative to the corresponding mounting end face 121, the cutting portion 10 is located at the edge of the blade body 12, and the two mounting end faces 121 are both provided with a cutting portion 10, the cutting portion 10 intersects with the first side face 1221, and the end of the cutting portion 10 away from the corresponding mounting end face 121 intersects with the first side face 1221 to form a cutting edge 11, and the cutting edge 11 extends along the edge of the corresponding first side face 1221. The blade body 12 has a center plane 13, the center plane 13 is perpendicular to the third direction, the center plane 13 is parallel to the second direction, the center plane 13 is located between the two second side surfaces 1222, the spacing distances between the center plane 13 and the two second side surfaces 1222 are equal, the center of the blade body 12 is located on the center plane 13, the spacing distance from the intersection of the center plane 13 and the cutting edge 11 to the corresponding mounting end surface 121 is H2, the spacing distance H2 from the intersection of the center plane 13 and the cutting edge 11 to the corresponding mounting end surface 121 is less than the maximum spacing distance H1 between the end of the cutting portion 10 away from the corresponding mounting end surface 121 and the corresponding mounting end surface 121, the cutting edge 11 can extend to both sides along the third direction from the end point at which the spacing distance from the corresponding mounting end surface 121 is H1, and as the cutting edge 11 gradually extends toward the second side surface 1222, the spacing distance between the cutting edge 11 and the corresponding second side surface 1222 gradually decreases. By setting the spacing distance H2 from the intersection of the center plane 13 and the cutting edge 11 to the corresponding mounting end face 121 to be smaller than the maximum spacing distance H1 between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121, the cutting blade 1 can achieve a good chip removal effect while maintaining its strength, thereby providing the cutting blade 1 with good chip removal performance.

[0041] In some embodiments of the present invention, 1.5H2≤H1≤2.5H2.

[0042] Furthermore, the maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 can be 1.5H2, 1.8H2, 2H2, 2.5H2, etc. The maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 can be between 1.5H2 and 2.5H2. Any value, including the endpoint value, is the maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 of the present invention. If the maximum spacing distance between the end of the cutting portion 10 that deviates from the corresponding mounting end face 121 and the corresponding mounting end face 121 is less than 1.5H2, the cutting edge 11 may not be sharp enough, thereby increasing the cutting force acting on the cutting edge 11 and affecting the processing effect of the cutting blade 1; if the maximum spacing distance between the end of the cutting portion 10 that deviates from the corresponding mounting end face 121 and the corresponding mounting end face 121 is greater than 2.5H2, the cutting edge 11 may be too sharp. A cutting edge 11 that is too sharp is prone to local stress concentration when subjected to cutting force, causing the cutting edge 11 to crack or break, thereby affecting the service life of the cutting blade 1. Therefore, the maximum spacing distance between the end of the cutting portion 10 away from the corresponding mounting end face 121 and the corresponding mounting end face 121 is in the range of 1.5H2 to 2.5H2, which can reduce the cutting force acting on the cutting edge 11, extend the service life of the cutting blade 1, and enable the cutting blade 1 to achieve the effect of dispersing chips toward the left and right sides of the contact point between the cutting edge 11 and the workpiece to be processed during chip removal, and guide the chip flow direction. Part of the chips can pass through the cutting edge 11 and flow to the side of the chip groove 123, and the other part of the chips can flow to the side of the workpiece surface to be processed, thereby achieving a good chip removal effect.

[0043] In some embodiments of the present invention, the cutting edge 11 includes a first corner cutting edge 111, a main cutting edge 112, a second corner cutting edge 113, a secondary cutting edge 114 and a third corner cutting edge 115 connected in sequence, and the second corner cutting edge 113 is arc-shaped.

[0044] The cutting edge 11 extends along the edge of the corresponding first side surface 1221 in the third direction, and the cutting edge 11 includes a first corner cutting edge 111, a main cutting edge 112, a second corner cutting edge 113, a secondary cutting edge 114 and a third corner cutting edge 115 which are connected in sequence. The end point of the cutting edge 11 and the corresponding mounting end face 121 which are spaced apart by a distance H1 is located at the main cutting edge 112. When the workpiece is subjected to high feed processing, the first corner cutting edge 111, the main cutting edge 112, the second corner cutting edge 113, the secondary cutting edge 114 and the third corner cutting edge 115 on the cutting edge 11 will not contact the workpiece at the same time. By setting the end point of the cutting edge 11 and the corresponding mounting end face 121 which are spaced apart by a distance H1 at the main cutting edge 112, the cutting force acting on the cutting edge 11 can be reduced. One end of the first corner cutting edge 111 is connected to the main cutting edge 112, and the other end of the first corner cutting edge 111 is connected to one of the second side surfaces 1222. The first corner cutting edge 111 can assist the main cutting edge 112 in completing the cutting process when processing a complex shape or requiring additional cutting force. The first corner cutting edge 111 can improve the stability of the cutting process and reduce the vibration of the cutting blade 1 caused by uneven distribution of cutting force. A chip groove 123 is formed on both second side surfaces 1222 on the blade body 12. The chip groove 123 on the second side surface 1222 connected to the first corner cutting edge 111 is arranged corresponding to the first corner cutting edge 111, so that the chips generated at the first corner cutting edge 111 can be discharged from the chip groove 123. The main cutting edge 112 directly contacts the workpiece, removes material through shearing action, and forms the required shape and size of the workpiece. The shape and angle of the main cutting edge 112 have a direct impact on the size and distribution of the cutting force. A suitable design of the cutting edge 112 can reduce the cutting force and improve the processing efficiency.

[0045] The second corner cutting edge 113 is arranged at one end of the main cutting edge 112 away from the first corner cutting edge 111. The second corner cutting edge 113 is connected to the main cutting edge 112. The second corner cutting edge 113 can play the role of assisting the main cutting edge 112. The second corner cutting edge 113 shares the cutting load of the main cutting edge 112, which helps to reduce the wear of the main cutting edge 112. The second corner cutting edge 113 can be constructed in an arc shape, which is conducive to reducing the stress concentration point of the cutting edge 11, reducing the risk of fracture or chipping of the cutting blade 1, and helping to extend the overall life of the cutting blade 1. The arc-shaped second corner cutting edge 113 can also help to form more regular chips and reduce the damage of chips to the workpiece or the cutting blade 1. The secondary cutting edge 114 is connected to the second corner cutting edge 113. The secondary cutting edge 114 has good continuity and smoothness. The secondary cutting edge 114 can reduce vibration during cutting and improve processing stability. One end of the third corner cutting edge 115 is connected to the auxiliary cutting edge 114, and the other end of the third corner cutting edge 115 is connected to another second side surface 1222. At least part of the third corner cutting edge 115 is located on the mounting end surface 121, so that the cutting edge 115 extends to the mounting end surface 121. The third corner cutting edge 115 can better guide the chips to be discharged from the chip groove 123, prevent chip accumulation or entanglement, and reduce the risk of processing interruption.

[0046] In some embodiments of the present invention, the second corner cutting edge 113 is in an arc shape.

[0047] Furthermore, the second corner cutting edge 113 can be constructed as an arc shape. The second corner cutting edge 113 can make the chips easily form a thinner state, and can reduce the cutting force acting on the cutting edge 11 during high feed processing, thereby improving the stability of the cutting blade 1 and extending the service life of the cutting blade 1.

[0048] In some embodiments of the present invention, the center plane 13 intersects with the second corner cutting edge 113. Along the third direction, the spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 is D1, and the width of the main cutting edge 112 is D2, satisfying the relationship: D2<D1.

[0049] The intersection of the center plane 13 and the cutting edge 11 is set at the second corner cutting edge 113, the center plane 13 intersects with the second corner cutting edge 113, and the second corner cutting edge 113 is connected to the main cutting edge 112. Along the third direction, the interval between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 is D1, and the width of the main cutting edge 112 is D2. When the cutting blade 1 processes the workpiece, the second corner cutting edge 113 contacts the workpiece first, and then the main cutting edge 112 contacts the workpiece. By setting the interval between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 to be greater than the width of the main cutting edge 112, the cutting force generated during processing can be made more stable, the elastic deformation of the workpiece can be effectively prevented, the surface roughness of the workpiece being processed can be improved, and the cutting edge 11 can cope with the cutting strength required for a large cutting depth, reduce the damage of the cutting edge 11, and thus more efficiently perform high feed processing.

[0050] In some embodiments of the present invention, the relationship is satisfied: 0.5 mm ≤ D1 ≤ 5 mm.

[0051] Exemplarily, the spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 can be 0.5mm, 1.2mm, 2mm, 3.8mm, 4.5mm, 5mm, etc., and the spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 can be between 0.5mm and 5mm. Any value including the endpoint value is the optional spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 of the present invention. If the spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 is less than 0.5mm, the load on the cutting edge 11 may increase, affecting the service life of the cutting blade 1, and may reduce the cutting depth of the cutting blade 1. If the spacing distance between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 is greater than 5mm, the cutting force may increase, causing vibration during the cutting process, reducing the cutting efficiency, and affecting the service life of the cutting blade 1. Therefore, the spacing between the intersection of the center plane 13 and the second corner cutting edge 113 and the main cutting edge 112 is within the range of 0.5 mm to 5 mm, which can balance the cutting force, reduce the risk of damage to the cutting blade 1 due to concentrated or unevenly dispersed cutting force, and extend the service life of the cutting blade 1. It can also improve the overall rigidity of the cutting blade 1, ensure the stability of the cutting blade 1, and improve the adaptability of the cutting blade 1, so that it can adapt to different processing conditions and workpiece materials.

[0052] In some embodiments of the present invention, Figure 2As shown, the blade body 12 has a central axis extending along the first direction, the spacing distance between the central axis of the blade body 12 and the straight line tangent to the first corner cutting edge 111 is L3, and the spacing distance between the central axis of the blade body 12 and the straight line tangent to the second corner cutting edge 113 is L4, 0.8≤L3 / L4≤1.2.

[0053] The blade body 12 has a central axis extending along a first direction, and the central axis is located on the central plane 13. The first corner cutting edge 111 has a point A1 with a maximum spacing distance from the central axis, L3 is a vertical distance between the central axis of the blade body 12 and a straight line tangent to A1, and the second corner cutting edge 113 has a point A2 with a maximum spacing distance from the central axis, and L4 is a vertical distance between the central axis of the blade body 12 and a straight line tangent to A2. The ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 to the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 can be K. Exemplarily, the ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 to the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 can be 0.8, 0.95, 1.05, 1.1, 1.2, etc. The ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 to the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 can be between 0.8-1.2. Any value, including the endpoint values, is the ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 to the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 of the present invention.

[0054] If the ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 and the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 is less than 0.8, the first corner cutting edge 111 is too close to the center axis relative to the second corner cutting edge 113, which may cause uneven distribution of cutting force, increase vibration and noise of the cutting blade 1, and affect the service life of the cutting blade 1. If the ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 and the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 is greater than 1.2, the second corner cutting edge 113 is too close to the center axis relative to the first corner cutting edge 111, which may cause uneven distribution of cutting force, increase vibration and noise of the cutting blade 1, and affect the service life of the cutting blade 1. If the ratio of the vertical distance between the center axis of the blade body 12 and the straight line tangent to A1 and the vertical distance between the center axis of the blade body 12 and the straight line tangent to A2 is between 0.8 and 1.2, the cutting force can be evenly distributed, which is beneficial to improving the stability of the cutting blade 1. When K approaches 0.8, a greater cutting depth of the cutting edge 11 can be achieved. When K approaches 1.2, the feed amount of the cutting edge 11 can be achieved, thereby achieving more efficient high-feed processing.

[0055] In some embodiments of the present invention, each mounting end surface 121 is provided with a plurality of cutting portions 10 , and the plurality of cutting portions 10 on the same mounting end surface 121 are symmetrical about the central axis of the blade body 12 .

[0056] Each mounting end face 121 is provided with a plurality of cutting portions 10. In the embodiment of the present invention, an example is taken that each mounting end face 121 is provided with two cutting portions 10. Each mounting end face 121 is provided with two cutting portions 10 that are opposite and spaced apart along the second direction. Both cutting portions 10 intersect with the corresponding first side face 1221, and the two cutting portions 10 on the same mounting end face 121 are symmetrical about the central axis of the blade body 12. Each mounting end face 121 is provided with a plurality of cutting portions 10, which can improve the cutting efficiency of the cutting blade 1 and improve the processing efficiency of the workpiece. The symmetry of the plurality of cutting portions 10 on the same mounting end face 121 about the central axis of the blade body 12 can make the cutting force acting on the cutting blade 1 more evenly distributed, which is beneficial to improving the surface roughness of the processed workpiece.

[0057] In some embodiments of the present invention, the connecting side surface 122 is perpendicular to the two mounting end surfaces 121 .

[0058] The connecting side surface 122 is connected between the two mounting end surfaces 121, and the connecting side surface 122 can support the two mounting end surfaces 121. The connecting side surface 122 is perpendicular to the two mounting end surfaces 121, which is beneficial to increase the rigidity of the cutting blade 1, making the cutting blade 1 more stable when subjected to cutting force, and further reducing the vibration of the cutting blade 1 during the cutting process. In addition, the connecting side surface 122 is perpendicular to the two mounting end surfaces 121, which can also simplify the geometric shape of the cutting blade 1, making the design and manufacture of the cutting blade 1 easier.

[0059] The cutting tool 100 according to the second embodiment of the present invention comprises a tool body 2 and the cutting blade 1 in the above embodiment, wherein the cutting blade 1 is fixed to the tool body 2 .

[0060] like Figure 4 and Figure 5 As shown, according to the cutting tool 100 of the embodiment of the present invention, the cutting tool 100 includes a tool body 2 and a cutting blade 1, the tool body 2 has a blade seat 21 for placing the cutting blade 1, and a plurality of cutting blades 1 may be arranged on the tool body 2. As an example, the blade seat 21 may include: a bottom placement surface 22, a main side placement surface 23, and a secondary side placement surface 24, a first mounting hole 221 for mounting the cutting blade 1 is formed on the bottom placement surface 22, and the cutting blade 1 has a first assembly hole 124, the first assembly hole 124 penetrates the cutting blade 1 along the arrangement direction of the two mounting end surfaces 121, the first mounting hole 221 and the first assembly hole 124 are both configured as threaded holes, the first mounting hole 221 and the first assembly hole 124 can be assembled with screws, and the cutting blade 1 can be fixedly connected to the tool body 2 by screws. When the cutting blade 1 is installed on the blade seat 21, the bottom placement surface 22 can abut against the installation end surface 121 of the cutting blade 1, the main side placement surface 23 can abut against the first side surface 1221 of the cutting blade 1, and the secondary side placement surface 24 can abut against the second side surface 1222 of the cutting blade 1, thereby realizing the limited cooperation between the cutting blade 1 and the blade seat 21, so that the cutting blade 1 is firmly set on the tool body 2, which is beneficial to ensure the stability and safety of the cutting tool 100, so that the cutting tool 100 can achieve the cutting effect.

[0061] Other structures and operations of the cutting insert 1 and the cutting tool 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cutting insert, characterized in that: include: The invention relates to a cutting portion (10) and a blade body (12), wherein the blade body (12) has two mounting end faces (121) that are opposite to each other and spaced apart in a first direction, and the blade body (12) further has a connecting side face (122), wherein the connecting side face (122) is located between the two mounting end faces (121), and the connecting side face (122) is connected to both mounting end faces (121), and at least one mounting end face (121) is provided with the cutting portion (10), and the cutting portion (10) is located at an edge of the blade body (12). The connecting side surface (122) comprises two first side surfaces (1221) and two second side surfaces (1222), the two first side surfaces (1221) are opposite to each other and spaced apart along a second direction, the two second side surfaces (1222) are opposite to each other and spaced apart along a third direction, the maximum spacing distance between the two first side surfaces (1221) is L1, the maximum spacing distance between the two second side surfaces (1222) is L2, and the relationship is satisfied: L2≤L1≤2L2, and the first direction, the second direction and the third direction are perpendicular to each other; The cutting portion (10) is located at the edge of the blade body (12), the cutting portion (10) intersects with the corresponding first side surface (1221), and a cutting edge (11) is formed at the end of the cutting portion (10) away from the corresponding mounting end surface (121), and the cutting edge (11) extends along the edge of the corresponding first side surface (1221); The cutting edge (11) comprises a first corner cutting edge (111), a main cutting edge (112), a second corner cutting edge (113), a secondary cutting edge (114) and a third corner cutting edge (115) which are connected in sequence, and the second corner cutting edge (113) is arc-shaped; The blade body (12) has a central axis extending along the first direction, the spacing distance between the central axis of the blade body (12) and the straight line tangent to the first corner cutting edge (111) is L3, and the spacing distance between the central axis of the blade body (12) and the straight line tangent to the second corner cutting edge (113) is L4, 0.8≤L3 / L4≤1.

2.

2. The cutting insert according to claim 1, characterized in that Along the first direction, the maximum spacing distance between the end of the cutting portion (10) away from the corresponding mounting end face (121) and the corresponding mounting end face (121) is H1, the blade body (12) has a center plane (13), the center plane (13) is perpendicular to the third direction, the center of the blade body (12) is located on the center plane (13), and the spacing distance from the intersection of the center plane (13) and the cutting edge (11) to the corresponding mounting end face (121) is H2, satisfying the relationship: H2<H1.

3. The cutting insert according to claim 2, characterized in that The relationship is satisfied: 1.5H2≤H1≤2.5H2.

4. The cutting insert according to claim 2, characterized in that The second corner cutting edge (113) is in an arc shape.

5. The cutting insert according to claim 2, characterized in that The center plane (13) intersects with the second corner cutting edge (113), and along the third direction, the spacing distance between the intersection of the center plane (13) and the second corner cutting edge (113) and the main cutting edge (112) is D1, and the width of the main cutting edge (112) is D2, satisfying the relationship: D2<D1.

6. The cutting insert according to claim 5, characterized in that The relationship is satisfied: 0.5mm≤D1≤5mm.

7. The cutting insert according to any one of claims 1 to 6, characterized in that Each of the mounting end surfaces (121) is provided with a plurality of the cutting portions (10), and the plurality of the cutting portions (10) on the same mounting end surface (121) are symmetrical about the central axis of the blade body (12).

8. The cutting insert according to any one of claims 1 to 6, characterized in that The connecting side surface (122) is perpendicular to the two mounting end surfaces (121).

9. A cutting tool, characterized in that: include: Blade body (2); A cutting insert (1), wherein the cutting insert (1) is a cutting insert (1) according to any one of claims 1 to 8, and the cutting insert (1) is fixed to the cutter body (2).

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