Cutting insert and cutting tool

Abstract

The invention discloses a cutting blade and a cutting tool, and relates to the technical field of cutting tools, the cutting blade comprises two opposite end surfaces along a first direction, each end surface comprises a mounting surface and two cutting areas; the peripheral side surface is connected with the two end surfaces and comprises two supporting surfaces which are opposite in the second direction and two side surfaces which are opposite in the third direction, and a first cutting edge, a second cutting edge and a third cutting edge are sequentially formed between the first cutting part, the second cutting part and the third cutting part which are distributed in the cutting area along the peripheral edge and the supporting surfaces as well as between the supporting surfaces and the side surfaces; the first cutting part is far away from the other cutting area in the second direction and obliquely extends close to the surface of the other end in the direction far away from the connected second cutting part in the third direction, and the second cutting part and the third cutting part are both far away from the other cutting area in the second direction and obliquely extend far away from the surface of the other end in the direction far away from the connected first cutting part in the third direction. According to the cutting blade, installation is stable, and the chip removal efficiency and the structural strength are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting tools, and more particularly, to a cutting insert and a cutting tool. BACKGROUND

[0002] There is a significant technical bottleneck in the field of tool structure design: when small-size tools are used for small-depth (also known as low-depth, referring to the machining state in which the cutting insert has a small depth of cutting into the workpiece) cutting machining, especially for long-chip materials (referring to the excess material removed from the workpiece by the tool), the tool system must simultaneously meet three core functional requirements: 1) stable insert mounting support system; 2) efficient chip guiding and accommodating system; and 3) sufficient insert structural strength.

[0003] With the development trend of tool size reduction, the traditional design method encounters structural contradictions: under the constraint of geometric size, the reduction of the support contact surface will inevitably weaken the clamping stability; the compression of the chip accommodating space will intensify the risk of chip accumulation; and the increased tool material in order to maintain the cutting strength will produce a chip blocking effect (referring to the fact that the chip material cannot be smoothly discharged). It is particularly worth noting that when the insert thickness is reduced to a critical size, the reverse correlation characteristics between the above-mentioned structural parameters are highlighted, forming a design constraint that restricts machining precision. Current technical solutions often sacrifice part of the key performance to improve other parameters, and this compromising design seriously limits the performance of small-size tools in machining. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art. To this end, one object of the present application is to propose a cutting insert that can take into account the three core functional requirements of the tool system, i.e., the cutting insert has a stable insert mounting support system, an efficient chip guiding and accommodating system, and sufficient insert structural strength.

[0005] Another object of the present application is to propose a cutting tool having the above-mentioned cutting insert.

[0006] According to the cutting insert of the embodiment of the present application, the two end surfaces are identical and oppositely arranged along a first direction, and each of the end surfaces comprises two identical and oppositely arranged cutting regions and a mounting surface located between the two cutting regions, and each of the cutting regions comprises a first cutting portion, a second cutting portion and a third cutting portion arranged along a circumferential edge of the end surface; a circumferential side surface connecting the two end surfaces, the circumferential side surface comprising two identical and oppositely arranged supporting surfaces along a second direction, and two identical and oppositely arranged side surfaces along a third direction, the first cutting portion being connected with the supporting surfaces and the side surfaces and forming a first cutting edge with the supporting surfaces, the second cutting portion being connected with the supporting surfaces and forming a second cutting edge, the third cutting portion being connected with the side surfaces and forming a third cutting edge, the first direction, the second direction and the third direction intersecting with each other, wherein, at one of the end surfaces, the first cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected second cutting portion along the third direction, the second cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected first cutting portion along the third direction, and the third cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected second cutting portion along the third direction.

[0007] According to the cutting insert of the embodiment of the present application, the two end surfaces are identical and oppositely arranged along a first direction, and each of the end surfaces comprises two identical and oppositely arranged cutting regions and a mounting surface located between the two cutting regions, and each of the cutting regions comprises a first cutting portion, a second cutting portion and a third cutting portion arranged along a circumferential edge of the end surface; a circumferential side surface connecting the two end surfaces, the circumferential side surface comprising two identical and oppositely arranged supporting surfaces along a second direction, and two identical and oppositely arranged side surfaces along a third direction, the first cutting portion being connected with the supporting surfaces and the side surfaces and forming a first cutting edge with the supporting surfaces, the second cutting portion being connected with the supporting surfaces and forming a second cutting edge, the third cutting portion being connected with the side surfaces and forming a third cutting edge, the first direction, the second direction and the third direction intersecting with each other, wherein, at one of the end surfaces, the first cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected second cutting portion along the third direction, the second cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected first cutting portion along the third direction, and the third cutting portion is inclined to extend in a direction away from the other cutting region along the second direction and in a direction away from the connected second cutting portion along the third direction.

[0008] In addition, the cutting insert according to the above-mentioned embodiments of the present application can further have the following additional technical features: According to some embodiments of the present application, the first cutting edge forms an angle α with the mounting surface, the second cutting edge forms an angle β with the mounting surface, and the third cutting edge forms an angle γ with the mounting surface, wherein α < γ, and / or β < γ.

[0009] According to some embodiments of the present application, the mounting surface has two first boundaries and two second boundaries, the two first boundaries are connected with the two first cutting portions one by one, the two first boundaries are parallel to each other and have a distance W1, the two second boundaries are connected with the two second cutting portions one by one, and the two second boundaries are parallel to each other and have a distance W2, wherein 0.75 ≤ W1 / W2 ≤ 2.

[0010] According to some embodiments of the application, the mounting surface has two second boundaries and two third boundaries, the two second boundaries are connected to the two second cutting portions one by one, the two second boundaries are parallel to each other and have a distance of W2, the two third boundaries are connected to the two third cutting portions one by one, the two third boundaries are parallel to each other and have a distance of W3, wherein 1≤W3 / W2≤2.

[0011] According to some embodiments of the application, the maximum dimension of the cutting insert along the first direction is H, in the first direction, the distance between the mounting surface and the end of the first cutting portion away from the mounting surface is H1, 0.001≤H1 / H≤0.15; and / or, in the first direction, the distance between the mounting surface and the end of the second cutting portion away from the mounting surface is H2, 0.005≤H2 / H≤0.3; and / or, in the first direction, the distance between the mounting surface and the end of the third cutting portion away from the mounting surface is H3, 0.005≤H3 / H≤0.3.

[0012] According to some embodiments of the application, the maximum dimension of the cutting insert along the first direction is H, the maximum dimension of the cutting insert along the second direction is W, the distance between the mounting surface and the end of the second cutting portion away from the mounting surface in the first direction is H2, the mounting surface has two first boundaries, the two first boundaries are connected to the two first cutting portions one by one, the two first boundaries are parallel to each other and have a distance of W1, H2 / H

[0013] According to some embodiments of the application, the maximum dimension of the cutting insert along the second direction is W, the mounting surface has two first boundaries, the two first boundaries are connected to the two first cutting portions one by one, the two first boundaries are parallel to each other and have a distance of W1, 0.5≤W1 / W≤1.84.

[0014] According to some embodiments of the application, the cutting region further comprises a corner cutting portion, the second cutting portion and the third cutting portion are connected through the corner cutting portion, the peripheral side surface further comprises a first corner side surface and an inclined side surface, the first corner side surface is located between the support surface and the side surface and connected to the corner cutting portion to form a fourth cutting edge, the inclined side surface connects the support surface and the second cutting edge, in a plane perpendicular to the first direction, the maximum dimension of the first corner side surface perpendicular to the extension direction of the fourth cutting edge is L1, the maximum dimension of the inclined side surface perpendicular to the extension direction of the second cutting edge is L2, wherein L1>L2.

[0015] According to some embodiments of the present application, the side surface is provided with a recess extending through the cutting insert in the height direction, an edge of the recess in the first direction is located between the first cutting edge of one of the cutting regions and the third cutting edge of another of the cutting regions and is connected with the third cutting edge.

[0016] A cutting tool according to an embodiment of the present application comprises a tool body and a cutting insert according to an embodiment of the present application, which is detachably mounted on the tool body through the mounting hole of the support surface, and the mounting surface of the two end surfaces is selectively in abutment with the tool body.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein: Figure 1 is a structural schematic view of a cutting tool according to an embodiment of the present application; Figure 2 is a structural schematic view of a cutting insert according to an embodiment of the present application; Figure 3 is a front view of Figure 2 ; Figure 4 is a side view of Figure 2 ; Figure 5 is a top view of Figure 2 ; Figure 6 is a partial enlarged view of frame A in Figure 5 ;

[0019] REFERENCE NUMERALS: cutting tool 1000; workpiece 2000; cutting insert 100; tool body 200; end surface 10; cutting region 11; first cutting portion 111; second cutting portion 112; third cutting portion 113; corner cutting portion 114; mounting surface 12; first boundary 121; second boundary 122; third boundary 123; peripheral side surface 20; support surface 21; mounting hole 211; side surface 22; recess 221; first corner side surface 23; second corner side surface 24; inclined side surface 25; first cutting edge 31; second cutting edge 32; third cutting edge 33; fourth cutting edge 34; first direction F1; second direction F2; third direction F3. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components have the same or similar designations throughout the several figures. The embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0021] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In the description of the present application, "first feature" and "second feature" can include one or more of the features, the meaning of "a plurality of" is two or more, and "above" or "below" the second feature of the first feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween, "above", "over" and "on" the second feature of the first feature includes directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0023] A cutting insert 100 according to embodiments of the present application is described below with reference to the accompanying drawings. The cutting insert 100 of the present application can be used in a cutting tool 1000. For example, in some embodiments, as shown in Figure 1 The cutting tool 1000 includes a tool body 200 and a cutting insert 100, the cutting insert 100 is mounted to the tool body 200, the tool body 200 can mount a plurality of cutting inserts 100, Figure 1 A schematic view of a cutting tool 1000 with the tool body 200 mounting one cutting insert 100.

[0024] Referring to Figures 1-6 As shown in FIG. 1, the cutting insert 100 according to embodiments of the present application can include a peripheral side surface 20 and two end surfaces 10, the two end surfaces 10 are identical and oppositely arranged along a first direction F1, and the peripheral side surface 20 connects the two end surfaces 10.

[0025] Specifically, each end surface 10 comprises two identical and oppositely arranged cutting regions 11 and a mounting surface 12 located between the two cutting regions 11, the cutting region 11 comprises a first cutting part 111, a second cutting part 112 and a third cutting part 113 arranged along the periphery of the end surface 10. The first cutting part 111, the second cutting part 112 and the third cutting part 113 can be directly connected or indirectly connected (for example Figures 1-6 The second cutting part 112 and the third cutting part 113 are indirectly connected through the corner cutting part 114 below), and the first cutting part 111, the second cutting part 112 and the third cutting part 113 can be directly connected or indirectly connected with the mounting surface 12.

[0026] The mounting surface 12 is used to abut the tool body 200 after the cutting insert 100 is mounted on the tool body 200, increases the contact area of the cutting insert 100 and the tool body 200 to reduce the risk of relative movement between the cutting insert 100 and the tool body 200, improves the connection firmness of the cutting insert 100 and the tool body 200, and realizes the stable installation of the cutting insert 100 on the tool body 200. The mounting surface 12 can be a plane, a curved surface, an irregular surface provided with a protrusion or a groove, or other shapes, as long as the mounting surface 12 can be stably mounted on the tool body 200. For example, in some embodiments, as shown in the figure, Figures 1-6 The mounting surface 12 is substantially flat in the direction perpendicular to the first direction F1.

[0027] The peripheral side surface 20 comprises two support surfaces 21 and two side surfaces 22, the two support surfaces 21 are identical and oppositely arranged along the second direction F2, the two side surfaces 22 are identical and oppositely arranged along the third direction F3, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. For example, Figures 1-6 As shown in the figure, the first direction F1 is parallel to the up-down direction, the second direction F2 is parallel to the front-back direction, the third direction F3 is parallel to the left-right direction, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. In the present application, the description of the up-down, front-back, left-right and other directions is only based on the directions marked in the drawings, and is not a limitation on the installation direction of the cutting insert 100 on the tool body 200.

[0028] The support surface 21 is used to abut the tool body 200 after the cutting insert 100 is mounted on the tool body 200, increases the contact area of the cutting insert 100 and the tool body 200 to reduce the risk of relative movement between the cutting insert 100 and the tool body 200, improves the connection firmness of the cutting insert 100 and the tool body 200, and realizes the stable installation of the cutting insert 100 on the tool body 200. In some embodiments, as shown in the figure, Figures 1-6 The mounting hole 211 is provided on the support surface 21, and the cutting insert 100 is detachably mounted on the tool body 200 through the mounting hole 211, which is convenient for disassembly and assembly.

[0029] The first cutting portion 111 is connected with the support surface 21 and the side surface 22 at the same time, the first cutting edge 31 is formed between the first cutting portion 111 and the support surface 21, the second cutting portion 112 is connected with the support surface 21 and forms the second cutting edge 32, and the third cutting portion 113 is connected with the side surface 22 and forms the third cutting edge 33. The first cutting edge 31, the second cutting edge 32 and the third cutting edge 33 are used to cut the workpiece 2000 during working.

[0030] The end surface 10 is two, each end surface 10 is provided with two identical cutting areas 11, so that the cutting insert 100 has four cutting areas 11, and each cutting area 11 can be used to cut the workpiece 2000 respectively and independently, which is beneficial to prolong the service life of the cutting insert 100 as a whole. For example, after the cutting edge of one of the cutting areas 11 is worn, the cutting tool 1000 can be used by using the cutting edge of another cutting area 11, without replacing the cutting insert 100. For example, in the embodiment in which the cutting insert 100 is arranged on the tool body 200, as shown in the figure, the mounting orientation of the cutting insert 100 can be adjusted, so that the four cutting areas 11 are selectively opposite to the workpiece 2000 to cut the workpiece 2000. Figure 1

[0031] At any one end surface 10, the first cutting portion 111 extends obliquely in the second direction F2 away from the other cutting area 11, in the third direction F3 away from the connected second cutting portion 112 towards the other end surface 10, the second cutting portion 112 extends obliquely in the second direction F2 away from the other cutting area 11, in the third direction F3 away from the connected first cutting portion 111 away from the other end surface 10, and the third cutting portion 113 extends obliquely in the second direction F2 away from the other cutting area 11, in the third direction F3 away from the connected second cutting portion 112 away from the other end surface 10. For example, in some specific embodiments, as shown in the figure, for the upper and front cutting area 11, the first cutting portion 111 extends obliquely forward and downward, extends obliquely right and downward, the second cutting portion 112 extends obliquely forward and upward, extends obliquely left and upward, and the third cutting portion 113 extends obliquely forward and upward, extends obliquely left and upward. The specific extension directions of the three cutting portions of the other three cutting areas 11 can also be obtained from the figure. Figure 2

[0032] ​​By the above definition, at any one end surface 10, the second cutting portion 112 and the third cutting portion 113 are both farther away from the other end surface 10 than the first cutting portion 111. In the process of cutting the workpiece 2000 by the cutting insert 100, the first cutting edge 31 and the second cutting edge 32 connected to the support surface 21 have a larger contact area with the workpiece 2000 as a whole than the third cutting edge 33 connected to the side surface 22, and the first cutting edge 31 and the second cutting edge 32 play a major cutting role on the workpiece 2000. The second cutting edge 32 is farther away from the other end surface 10 than the first cutting edge 31, so that the second cutting edge 32 serves as the main cutting zone 11 when cutting, especially when cutting at a low cutting depth. In the cutting process, the other cutting zone 11 of the same end surface 10 is inclined relative to the mounting surface 12, so that the two cutting zones 11 at one end surface 10 cooperate with each other, which is conducive to guiding the chip flow to the set chip pocket, for example, the cutting material generated after the cutting edge cuts the workpiece 2000 flows to the mounting surface 12 and is then blocked by the second cutting portion 112 and the third cutting portion 113 of the two cutting zones 11 respectively, and is left on the mounting surface 12, for example, the chip material flowing to the mounting surface 12 is guided by the first cutting portion 111 to flow out of the cutting insert 100.

[0033] By the cooperation of the two cutting zones 11, the cutting is smooth and the chip removal is smooth. At the same time, because the second cutting portion 112 and the third cutting portion 113 are arranged to extend away from the other end surface 10 from the mounting surface 12, for example Figure 2 As shown in the upper end surface 10, the second cutting portion 112 and the third cutting portion 113 of the upper end surface 10 are higher than the mounting surface 12 of the upper end surface 10, and the second cutting portion 112 and the third cutting portion 113 of the lower end surface 10 are lower than the mounting surface 12 of the lower end surface 10, which is conducive to enhancing the overall structural strength of the cutting insert 100 and prolonging the cutting life of the cutting insert 100 without weakening the strong mounting stability of the mounting surface 12.

[0034] At any one end surface 10, the boundaries between the first cutting portion 111, the second cutting portion 112 and the third cutting portion 113 and the mounting surface 12 are connected along a non-straight line, so that the projection of the mounting surface 12 between the two cutting zones 11 perpendicular to the first direction F1 is a polygon, which can realize a relatively dispersed stress area and further provide a guarantee for the large contact area required by the stable installation of the cutting insert 100.

[0035] For any one end surface 10, the mounting surface 12 and the two cutting zones 11 make the end surface 10 as a whole present a U shape. For example, in some specific embodiments, as shown in Figure 4As shown, for the end surface 10 located on the upper side, the second cutting part 112 and the third cutting part 113 of each of the two cutting areas 11 are higher than the mounting surface 12 between the two cutting areas 11, so that the end surface 10 is approximately U-shaped in the perspective view from left to right.

[0036] At the end surface 10, the stable installation of the cutting insert 100 can be facilitated by the mounting surface 12, and the first cutting edge 31, the second cutting edge 32 and the third cutting edge 33 are all inclined to the workpiece 2000 to obliquely cut the workpiece 2000 by the first cutting part 111, the second cutting part 112 and the third cutting part 113 extending obliquely, which is beneficial to reduce the cutting force of the first cutting edge 31, the second cutting edge 32 and the third cutting edge 33 during cutting the workpiece 2000, so that the cutting of the cutting insert 100 on the workpiece 2000 is more light and the cutting effect is better. The cutting force refers to the energy consumed by the cutting edge during cutting the workpiece 2000. Under the same cutting conditions, the lower the cutting force, the lighter the cutting, and the lower the load of the cutting edge.

[0037] In some related technologies, the cutting insert is detachably installed on the tool body through the mounting hole of the support surface, and the installation stability of the cutting insert is improved by increasing the size of the mounting hole. However, under the condition that the overall size of the cutting insert is constant, increasing the size of the mounting hole will reduce the required material of the cutting insert as a whole, resulting in a decrease in the overall strength of the cutting insert, that is, sacrificing the structural strength of the cutting insert to obtain higher installation stability, which shortens the service life of the cutting insert.

[0038] In the present application, each end surface 10 is matched by two cutting areas 11, and the second cutting part 112 and the third cutting part 113 in each cutting area 11 are farther away from the other end surface 10 than the first cutting part 111, so that the second cutting edge 32 and the third cutting edge 33 at the cutting area 11 are farther away from the other end surface 10 than the first cutting edge 31, to build a gradientized strong structure, so that the cutting insert 100 has sufficient structural strength to meet the stronger blade strength requirement at the cutting edge of the cutting insert 100, and prolong the service life of the cutting insert 100. Without reducing the area of the mounting surface 12, it is beneficial to improve the overall structural strength of the cutting insert 100 without weakening the strong installation stability of the mounting surface 12, and prolong the cutting life of the cutting insert 100.

[0039] The mounting surface 12 between the two cutting zones 11 is formed into a polygon by the first cutting part 111, the second cutting part 112 and the third cutting part 113, which can disperse the cutting force transmitted by the cutting zone 11 to reduce the maximum stress of the cutting insert 100 everywhere, and make the mounting of the cutting tool body 200 more stable. By extending the first cutting part 111, the second cutting part 112 and the third cutting part 113 obliquely relative to the mounting surface 12, the cutting force during the cutting of the workpiece 2000 by the first cutting edge 31, the second cutting edge 32 and the third cutting edge 33 can also be reduced, so that the cutting of the workpiece 2000 by the cutting insert 100 is more light and the cutting effect is better. While ensuring the overall strength of the cutting insert 100, the positions and oblique directions of the first cutting part 111, the second cutting part 112 and the third cutting part 113 can be changed to increase the area of the mounting surface 12, which is beneficial to improve the mounting stability of the cutting insert 100 and increase the chip space.

[0040] Without increasing the size of the mounting hole 211 at the support surface 21, the area of the mounting surface 12 can be increased by the cooperation of the two cutting zones 11 at each end surface 10, so as to improve the mounting stability of the cutting insert 100, and facilitate the consideration of the structural strength and mounting stability requirements of the cutting insert 100. In combination with the support surface 21 and the mounting surface 12, an enhanced support interface is constructed to meet the requirement of a larger support area of the cutting insert 100, so that the cutting insert 100 has a stable blade mounting support system, which is beneficial to meet the stability requirement of the cutting insert 100 in the cutting process.

[0041] The cooperation of the two cutting zones 11 at each end surface 10 is also beneficial to guide the chip material generated by the cutting of the workpiece 2000 by the first cutting edge 31, the second cutting edge 32 and the third cutting edge 33 to the set chip space, such as remaining in the mounting surface 12 or flowing out of the cutting insert 100 through the first cutting part 111, so as to make the cutting light and the chip removal smooth. The mounting surface 12 and the two cutting zones 11 at each end surface 10 can construct an expanded chip space to meet the requirement of a larger chip space of the cutting insert 100, so that the cutting insert 100 has an efficient chip guiding and chip space system, which improves the chip removal efficiency of the cutting insert 100 in the cutting process.

[0042] Therefore, the cutting insert 100 of the present application can break through the existing design limitations, and coordinate and construct the three functional elements of the enhanced support interface, the expanded chip space and the gradientized strong structure without increasing the overall size of the cutting insert 100, so as to fundamentally solve the problem of the coordination and optimization among the stability, the chip removal efficiency and the service life of the cutting insert 100 in the cutting process.

[0043] According to the cutting insert 100 of the embodiment of the present application, the two cutting areas 11 of each end surface 10 cooperate with each other, and the mounting surface 12 between the two cutting areas 11 of each end surface 10 and the supporting surface 21, so that the cutting insert 100 has a stable insert mounting and supporting system, an efficient chip guiding and accommodating system, and sufficient structural strength, so that the cutting insert 100 can meet the three core functional requirements of the tool system, and is beneficial to improve the mounting stability and chip removal efficiency of the cutting insert 100 in the cutting process, and prolong the service life of the cutting insert 100.

[0044] In some embodiments of the present application, as shown in Figures 2-4 The angle between the first cutting edge 31 and the mounting surface 12 is α, and the angle between the third cutting edge 33 and the mounting surface 12 is γ. Among them, α < γ, α can take the maximum value of the angle between the extension direction of any part of the first cutting edge 31 and the mounting surface 12, and γ can take the minimum value of the angle between the extension direction of any part of the third cutting edge 33 and the mounting surface 12. α < γ, so that the third cutting edge 33 has a steeper inclination than the first cutting edge 31, that is, the third cutting portion 113 has a steeper inclination than the first cutting portion 111, which is beneficial to guide the chip material to flow through the cutting area 11 and easily enter the chip accommodating passage according to the set curling direction and size, while making the cutting insert 100 obtain lower cutting force, improving the chip removal performance, cutting performance and cutting edge strength of the cutting insert 100.

[0045] In some embodiments, as shown in Figures 2-4 The angle between the second cutting edge 32 and the mounting surface 12 is β, and β < γ. β can take the maximum value of the angle between the extension direction of any part of the second cutting edge 32 and the mounting surface 12, and γ can take the minimum value of the angle between the extension direction of any part of the third cutting edge 33 and the mounting surface 12. β < γ, so that the third cutting edge 33 has a steeper inclination than the second cutting edge 32, that is, the third cutting portion 113 has a steeper inclination than the second cutting portion 112, which is beneficial to guide the chip material to flow through the cutting area 11 and easily enter the chip accommodating passage according to the set curling direction and size, while making the cutting insert 100 obtain lower cutting force, improving the chip removal performance, cutting performance and cutting edge strength of the cutting insert 100.

[0046] For example, in some specific embodiments, as shown in Figures 2-4 From the front to the rear of the cutting insert 100 (as shown in the perspective view of Figure 3 The angle between the first cutting edge 31 and the third direction F3 is α, and the angle between the second cutting edge 32 and the third direction F3 is β. From the left to the right of the cutting insert 100 (as shown in the perspective view of Figure 4 The angle between the third cutting edge 33 and the second direction F2 is γ.

[0047] In some embodiments of the present application, as shown in Figures 2-5 The mounting surface 12 has two first boundaries 121 and two second boundaries 122, the two first boundaries 121 are connected to the two first cutting portions 111 one by one, the two first boundaries 121 are parallel to each other and have a distance W1, the two second boundaries 122 are connected to the two second cutting portions 112 one by one, the two second boundaries 122 are parallel to each other and have a distance W2. Wherein, 0.75≤W1 / W2≤2. The first boundary 121 and the second boundary 122 clearly define the boundary characteristics of the mounting surface 12, so that the mounting surface 12 forms a polygonal shape conducive to dispersing stress.

[0048] W1 is too large, W1 is much larger than W2, which will cause W1 / W2 to be greater than 2, in the case of unchanged overall size of the cutting insert 100, it will cause the size of the first cutting portion 111 to be too small, the chip space is too small, and the chip removal efficiency is low. W1 is too small, W1 is much smaller than W2, which will cause W1 / W2 to be less than 0.75, in the case of unchanged overall size of the cutting insert 100, it will cause the area of the mounting surface 12 to be too small, the chip space is too small, the chip removal efficiency is low, and the area of the abutting region of the cutting insert 100 and the tool body 200 is reduced, resulting in poor mounting stability of the cutting insert 100. In the case of changing the overall size of the cutting insert 100, W1 is too small, which will cause the size of the cutting insert 100 along the third direction F3 to be larger than the size along the second direction F2, the cutting insert 100 is thin or elongated, which is easy to cause the cutting insert 100 to bear excessive cutting load and damage prematurely, shorten the service life of the cutting insert 100.

[0049] W2 is too small, W1 is much larger than W2, which will cause W1 / W2 to be greater than 2, in the case of unchanged overall size of the cutting insert 100, it will cause the area of the mounting surface 12 to be too small, the chip space is too small, the chip removal efficiency is low, and the area of the abutting region of the cutting insert 100 and the tool body 200 is reduced, resulting in poor mounting stability of the cutting insert 100. In the case of changing the overall size of the cutting insert 100, W2 is too small, which will cause the size of the cutting insert 100 along the third direction F3 to be larger than the size along the second direction F2, the cutting insert 100 is thin or elongated, which is easy to cause the cutting insert 100 to bear excessive cutting load and damage prematurely, shorten the service life of the cutting insert 100.

[0050] W2 is too large, W1 is much smaller than W2, which will cause W1 / W2 to be less than 0.75, in the case of unchanged overall size of the cutting insert 100, it will cause the thickness of the second cutting portion 112 to be too small, weaken the strength of the cutting insert 100 as a whole, especially at the second cutting edge 32, which is easy to cause the cutting insert 100 to bear excessive cutting load and damage prematurely, shorten the service life of the cutting insert 100.

[0051] Therefore, ensuring that 0.75 ≤ W1 / W2 ≤ 2 allows for the arrangement of a matching mounting surface 12 area and shape based on the size of the cutting area of ​​the cutting insert 100. This enables the cutting insert 100 to achieve higher installation stability and a wider chip space within it, while ensuring that the overall size and shape of the cutting insert 100 meet strength requirements. For example, W1 / W2 can be 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.1, 1.2, 1.5, 1.6, 1.8, or 2.

[0052] In some embodiments, such as Figures 2-5 As shown, the mounting surface 12 has two second boundaries 122 and two third boundaries 123. The two second boundaries 122 are connected to the two second cutting portions 112 in a one-to-one correspondence, and the two second boundaries 122 are parallel to each other with a distance of W2. The two third boundaries 123 are connected to the two third cutting portions 113 in a one-to-one correspondence, and the two third boundaries 123 are parallel to each other with a distance of W3. Wherein, 1≤W3 / W2≤2. The boundary characteristics of the mounting surface 12 are defined by the second boundaries 122, making the mounting surface 12 form a polygonal shape that is conducive to distributing the force.

[0053] If W3 is too large, making it much larger than W2, the ratio W3 / W2 will be greater than 2. With the overall dimensions of the cutting insert 100 remaining constant, this will result in an excessively thin third cutting section 113, weakening the overall strength of the cutting insert 100, especially at the third cutting edge 33. This can easily lead to the cutting insert 100 bearing excessive cutting loads and premature damage, shortening its service life. Conversely, if the overall dimensions of the cutting insert 100 change, an excessively large W3 will cause the dimension of the cutting insert 100 along the third direction F3 to be too large compared to the dimension along the second direction F2. This results in the cutting insert 100 being too thin or too long, which can also easily lead to the cutting insert 100 bearing excessive cutting loads and premature damage, shortening its service life.

[0054] If W3 is too small, it will be smaller than W2, which will cause W3 / W2 to be less than 1. With the overall size of the cutting insert 100 unchanged, the area of ​​the mounting surface 12 will be too small, the chip space will be too small, the chip removal efficiency will be low, and the area of ​​the contact area between the cutting insert 100 and the tool body 200 will be reduced, resulting in poor installation stability of the cutting insert 100.

[0055] W2 is too small, W3 is much larger than W2, W3 / W2 is greater than 2, the overall size of the cutting insert 100 is unchanged, the mounting surface 12 is too small, the chip space is too small, the chip removal efficiency is low, and the area of the abutting region of the cutting insert 100 and the tool body 200 is reduced, resulting in poor mounting stability of the cutting insert 100. In the case of changing the overall size of the cutting insert 100, W2 is too small, the size of the cutting insert 100 along the third direction F3 is too large compared to the size along the second direction F2, the cutting insert 100 is too thin or too long, and the cutting insert 100 is prone to damage due to excessive cutting load, thereby shortening the service life of the cutting insert 100.

[0056] W2 is too large, W3 is smaller than W2, W3 / W2 is less than 1, the overall size of the cutting insert 100 is unchanged, the thickness of the second cutting portion 112 is too small, the strength of the cutting insert 100 as a whole, especially at the second cutting edge 32, is weakened, and the cutting insert 100 is prone to damage due to excessive cutting load, thereby shortening the service life of the cutting insert 100.

[0057] Therefore, 1≤W3 / W2≤2 is beneficial to ensure that the cutting area 11 has a relatively appropriate length of cutting edge relative to the size of the cutting insert 100, to improve the cutting accessibility of the cutting edge, to improve the structural strength of the cutting insert 100, especially at the second cutting edge 32 and the third cutting edge 33, to prolong the service life of the cutting insert 100, and to meet the installation strength requirements of the large-area mounting surface 12, and to make the chip space in the cutting insert 100 more extensive. For example, W3 / W2 is 1, 1.01, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2, etc.

[0058] In some embodiments of the present application, as shown in Figures 1-4 The maximum size of the cutting insert 100 along the first direction F1 is H, in the first direction F1, the distance between the mounting surface 12 and the end of the first cutting portion 111 away from the mounting surface 12 is H1, and 0.001≤H1 / H≤0.15. For example, in some specific embodiments, as shown in Figures 2-4 At the upper end surface 10, for the cutting areas 11 of the front side and the rear end, the first cutting portion 111 has a portion recessed downward from the mounting surface 12, and H1 refers to the distance between the lower end of the first cutting portion 111 and the mounting surface 12. At the lower end surface 10, for the cutting areas 11 of the front side and the rear end, the first cutting portion 111 has a portion recessed upward from the mounting surface 12, and H1 refers to the distance between the upper end of the first cutting portion 111 and the mounting surface 12.

[0059] If H1 is too large, resulting in H1 / H greater than 0.15, and with the overall size of the cutting insert 100 remaining unchanged, the end of the first cutting section 111 furthest from the connected mounting surface 12 will be too close to the end surface 10 on the other side. This reduces the overall material of the cutting insert 100, leading to a decrease in the overall strength of the cutting insert 100. Furthermore, the chip material generated at the first cutting edge 31 is more likely to damage other unused cutting areas 11. If H1 is too small, resulting in H1 / H less than 0.001, and with the overall size of the cutting insert 100 remaining unchanged, the size of the first cutting section 111 will decrease, the chip space will decrease, and the chip removal efficiency will be low.

[0060] Therefore, ensuring that 0.001 ≤ H1 / H ≤ 0.15 provides a larger chip passage during cutting, which facilitates the removal of chip material, reduces chip squeezing and accumulation, and better protects unused cutting areas from damage. Examples of H1 / H values ​​include 0.001, 0.005, 0.009, 0.01, 0.015, 0.02, 0.05, 0.09, 0.1, 0.12, 0.13, or 0.15.

[0061] In some embodiments, such as Figures 1-4 As shown, in the first direction F1, the distance between the mounting surface 12 and the end of the second cutting portion 112 furthest from the connected mounting surface 12 is H2, where 0.005 ≤ H2 / H ≤ 0.3. For example, in some specific embodiments, such as... Figures 2-4 As shown, on the upper end surface 10, for both the front and rear cutting areas 11, the second cutting portion 112 protrudes upward from the mounting surface 12, and H2 refers to the distance between the upper end of the second cutting portion 112 and the mounting surface 12. On the lower end surface 10, for both the front and rear cutting areas 11, the second cutting portion 112 protrudes downward from the mounting surface 12, and H2 refers to the distance between the lower end of the second cutting portion 112 and the mounting surface 12.

[0062] An excessively large H2 results in an H2 / H ratio greater than 0.3. With the overall dimensions of the cutting insert 100 remaining constant, this causes the end of the second cutting section 112 furthest from the connected mounting surface 12 to be excessively far from the end surface 10 on the other side (e.g., ...). Figures 2-4 The second cutting part 112 on the upper middle side protrudes too high, and the tilt angle of the second cutting edge 32 is too large. Without reducing the area of ​​the mounting surface 12, this will result in the thickness of the second cutting part 112 being too small, weakening the overall strength of the cutting insert 100, especially at the second cutting edge 32. This can easily cause the cutting insert 100 to bear excessive cutting loads and be damaged prematurely, shortening the service life of the cutting insert 100.

[0063] If H2 is too small, H2 / H will be less than 0.005. If the overall size of the cutting insert 100 remains unchanged, the size of the second cutting part 112 will decrease, the tilt angle of the second cutting edge 32 will be too small, and the cutting force consumed by the second cutting edge 32 during the cutting process will be too large.

[0064] Therefore, ensuring that 0.005 ≤ H2 / H ≤ 0.3 is beneficial for obtaining a controllable cutting edge inclination range, thereby controlling the chip curling direction and achieving a lower axial cutting force. It also facilitates chip discharge away from the machined surface at a distance of 200° from the workpiece (e.g., Figure 1 The cutting insert 100 produces chips that are discharged to the right when cutting the workpiece 2000. This also enhances the overall strength of the cutting insert 100 and increases its service life. For example, H2 / H can be 0.005, 0.009, 0.01, 0.05, 0.07, 0.1, 0.16, 0.19, 0.2, 0.25, 0.26, or 0.3.

[0065] In some embodiments, such as Figures 1-4 As shown, in the first direction F1, the distance between the mounting surface 12 and the end of the third cutting portion 113 furthest from the connected mounting surface 12 is H3, where 0.005 ≤ H3 / H ≤ 0.3. For example, in some specific embodiments, such as... Figures 2-4 As shown, on the upper end surface 10, for both the front and rear cutting areas 11, the third cutting portion 113 protrudes upward from the mounting surface 12, and H3 refers to the distance between the upper end of the third cutting portion 113 and the mounting surface 12. On the lower end surface 10, for both the front and rear cutting areas 11, the third cutting portion 113 protrudes downward from the mounting surface 12, and H3 refers to the distance between the lower end of the third cutting portion 113 and the mounting surface 12.

[0066] An excessively large H3 results in an H3 / H ratio greater than 0.3. With the overall dimensions of the cutting insert 100 remaining constant, this causes the end of the third cutting section 113 furthest from the connected mounting surface 12 to be excessively far from the end surface 10 on the other side (e.g., ...). Figures 2-4 The third cutting section 113 on the upper middle side protrudes too high, and the inclination angle of the third cutting edge 33 is too large. Without reducing the area of ​​the mounting surface 12, this results in the thickness of the third cutting section 113 being too small, weakening the overall strength of the cutting insert 100, especially at the third cutting edge 33. This can easily lead to the cutting insert 100 bearing excessive cutting loads and premature damage, shortening its service life. The excessively small H3 ratio (H3 / H less than 0.005) results in a smaller size of the third cutting section 113 while keeping the overall dimensions of the cutting insert 100 unchanged. This leads to an excessively small inclination angle of the third cutting edge 33, causing the second cutting edge 32 to consume excessive cutting force during cutting. Furthermore, the second cutting section 112's guiding effect on the material flowing to the mounting surface 12 is poor, resulting in low chip removal efficiency.

[0067] Therefore, 0.005≤H3 / H≤0.3 is made, which is beneficial to obtain a controllable range of cutting edge inclination, guide the chip flow to the set chip space, make the cutting light and the chip removal smooth, and obtain a reasonable cutting force, thereby prolonging the service life of the cutting insert 100. For example, H3 / H is 0.005, 0.009, 0.01, 0.05, 0.07, 0.1, 0.16, 0.19, 0.2, 0.25, 0.26 or 0.3, etc.

[0068] In some embodiments, as shown in Figures 2-5 the maximum dimension of the cutting insert 100 along the second direction F2 is W, the mounting surface 12 has two first boundaries 121, the two first boundaries 121 are connected to the two first cutting portions 111 one by one, and the two first boundaries 121 are parallel to each other and have a spacing W1, 0.5≤W1 / W≤1.84.

[0069] If W1 is too large and W1 is much larger than W, W1 / W is greater than 1.84, the size of the first cutting portion 111 is too small, the chip space is too small, and the chip removal efficiency is low under the condition that the overall size of the cutting insert 100 is unchanged. If W1 is too small and W1 is much smaller than W, W1 / W is less than 0.5, the area of the mounting surface 12 is too small, the chip space is too small, the chip removal efficiency is low, and the area of the abutting region of the cutting insert 100 and the tool body 200 is reduced, which leads to poor mounting stability of the cutting insert 100 and is not conducive to the installation of the cutting insert 100. If W1 is too small under the condition that the overall size of the cutting insert 100 is changed, the size of the cutting insert 100 along the third direction F3 is too large compared to the size along the second direction F2, the cutting insert 100 is too thin or too long, and the cutting insert 100 is prone to damage due to excessive cutting load, thereby shortening the service life of the cutting insert 100.

[0070] Therefore, 0.5≤W1 / W≤1.84 is made, which is beneficial to link the optimal size of the mounting surface 12 and the strong structural strength in the cutting insert 100 with the size of the cutting insert 100, thereby obtaining sufficient mounting stability, smooth chip removal and low cutting force. For example, W1 / W is 0.5, 0.6, 0.7, 0.9, 1, 1.2, 1.4, 1.6, 1.8 or 1.84, etc.

[0071] In some embodiments of the present application, as shown in Figures 2-5As shown, the maximum dimension of the cutting insert 100 along the first direction F1 is H, and the maximum dimension of the cutting insert 100 along the second direction F2 is W. The mounting surface 12 has a spacing H2 from the end of the second cutting portion 112 away from the mounting surface 12 along the first direction F1, and the mounting surface 12 has two first boundaries 121 connected to the two first cutting portions 111 respectively, the two first boundaries 121 are parallel to each other and have a spacing W1, and H2 / H < W1 / W.

[0072] If H2 is too large, H2 / H > W1 / W, and the overall size of the cutting insert 100 is unchanged, the end of the second cutting portion 112 away from the mounting surface 12 is too far from the other end surface 10, and the second cutting edge 32 has too large an inclination angle. Without reducing the area of the mounting surface 12, the thickness of the second cutting portion 112 is too small, weakening the strength of the cutting insert 100 as a whole, especially at the second cutting edge 32, and easily leading to premature damage of the cutting insert 100 under excessive cutting load, shortening the service life of the cutting insert 100.

[0073] If W1 is too small, H2 / H > W1 / W, and the overall size of the cutting insert 100 is unchanged, the area of the mounting surface 12 is too small, the chip space is too small, the chip removal efficiency is low, and the area of the abutting region of the cutting insert 100 and the tool body 200 is reduced, resulting in poor mounting stability of the cutting insert 100, which is not conducive to the installation of the cutting insert 100. If the overall size of the cutting insert 100 is changed, W1 being too small will result in the size of the cutting insert 100 along the third direction F3 being too large compared to the size along the second direction F2, the cutting insert 100 being too thin or too elongated, easily leading to premature damage of the cutting insert 100 under excessive cutting load, shortening the service life of the cutting insert 100.

[0074] Therefore, H2 / H < W1 / W, on the one hand, can meet the requirements of the cutting insert 100 maintaining sufficient structural strength at different cutting depths, and providing a suitable chip space for light cutting and easy chip removal. On the other hand, the overall size of the cutting insert 100 can be adjusted according to the actual situation of the workpiece 2000 to meet the cutting requirements, so as to avoid waste of raw materials and increase costs, or the cutting insert 100 being too thin and reducing the service life, which is conducive to reducing the manufacturing cost of the cutting insert 100 and prolonging the service life of the cutting insert 100.

[0075] In some embodiments, as Figures 2-6As shown, the cutting zone 11 also includes a corner cutting section 114. The second cutting section 112 and the third cutting section 113 are connected through the corner cutting section 114, so that the first cutting section 111, the second cutting section 112, the corner cutting section 114, and the third cutting section 113 are sequentially connected along the periphery of the end surface 10. The peripheral side surface 20 also includes a first corner side surface 23 and a chamfered side surface 25. The first corner side surface 23 is located between the support surface 21 and the side surface 22 and is connected to the corner cutting section 114 to form a fourth cutting edge 34. The chamfered side surface 25 connects the support surface 21 and the second cutting edge 32. On a plane perpendicular to the first direction F1 (e.g. Figures 5-6 (From the perspective shown), the maximum dimension of the first corner side 23 perpendicular to the extension direction of the fourth cutting edge 34 is L1, and the maximum dimension of the oblique side 25 perpendicular to the extension direction of the second cutting edge 32 is L2.

[0076] L1>L2, making the first corner side 23 farther away from the mounting surface 12 than the inclined side 25, which is conducive to increasing the size and thickness of the corner cutting part 114, thereby enhancing the strength of the weak area and improving cutting safety. For example, during the cutting process, the weak area of ​​the tool tip at the first corner side 23, namely the fourth cutting edge 34, is not easily damaged, which is conducive to improving the overall strength of the cutting tool 100 and protecting the cutting tool 100.

[0077] In some embodiments, such as Figures 2-6 As shown, the peripheral side surface 20 also includes a second corner side surface 24, which is located between the support surface 21 and the side surface 22 and is connected to the first cutting portion 111. In the first direction F1, the first corner side surface 23 is further away from the other end surface 10 than the mounting surface 12, and the second corner side surface 24 is closer to the other end surface 10 than the mounting surface 12. For example, in some specific embodiments, such as Figures 2-6 As shown, at the upper end surface 10, the first corner side 23 protrudes upward relative to the mounting surface 12, while the second corner side 24 is recessed downward relative to the mounting surface 12. By providing the first corner side 23 and the second corner side 24, a larger chip passage can be provided during cutting, which is beneficial for chip discharge, prevents chip squeezing and accumulation, and also better protects the unused cutting area from damage.

[0078] In some embodiments, such as Figures 2-6As shown, the side surface 22 is provided with a recess 221 penetrating the cutting insert 100 along the height direction, the edge of the recess 221 along the first direction F1 is located between the first cutting edge 31 of one cutting area 11 and the third cutting edge 33 of another cutting area 11 and connected with the third cutting edge 33. Through the recess 221, the effective size of the third cutting edge 33 for cutting the workpiece 2000 can be controlled, thereby providing a basic guarantee for safe cutting, so as to increase the possibility of realizing different cutting processes, for example, avoiding the workpiece 2000 through the recess 221 in the process of machining a small-angle slope.

[0079] As shown, the cutting tool 1000 according to the embodiment of the present application comprises a tool body 200 and the cutting insert 100 according to the embodiment of the present application. The cutting insert 100 is detachably mounted on the tool body 200 through the mounting hole 211 of the support surface 21, and the mounting surface 12 of the two end surfaces 10 is in abutment with the tool body 200. A bolt or other fastener can be passed through the mounting hole 211 and connected and fastened with the tool body 200, so as to detachably and firmly mount the cutting insert 100 on the tool body 200. Figure 1 Through the support surface 21 and the mounting surface 12, the mounting stability of the cutting insert 100 on the tool body 200 can be improved, and through the mounting hole 211, the relative position of each cutting insert 100 on the tool body 200 can be adjusted, so that the four cutting areas 11 of the cutting insert 100 are alternatively used for the cutting tool 1000, which is beneficial to increase the number of uses of the cutting insert 100 and prolong the service life of the cutting insert 100. In the case that the mounting surface 12 of one of the two end surfaces 10 is in abutment with the tool body 200, the two cutting areas 11 of the end surface 10 are alternatively used for the cutting tool 1000. In the case that the mounting surface 12 of the other of the two end surfaces 10 is in abutment with the tool body 200, the two cutting areas 11 of the end surface 10 are alternatively used for the cutting tool 1000.

[0080] Since the cutting tool 1000 according to the embodiment of the present application has the above beneficial technical effects, the cutting tool 1000 according to the embodiment of the present application, through the cooperation of the two cutting areas 11 of each end surface 10 and the mounting surface 12 between the two cutting areas 11 at the support surface 21 and each end surface 10, makes the cutting insert 100 have a stable insert mounting support system, an efficient chip guide and containment system, and sufficient structural strength, so that the cutting insert 100 can meet the three core functional requirements of the tool system, which is beneficial to improve the mounting stability and chip removal efficiency of the cutting insert 100 in the cutting process and prolong the service life of the cutting insert 100.

[0081]

[0082] ​Other configurations and operations of the cutting insert 100 and the cutting tool 1000 according to the embodiments of the present application are known to those of ordinary skill in the art, and thus will not be described in detail herein.

[0083] In the description of the present application, it is necessary to point out that, unless explicitly defined and limited otherwise, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0084] In the description of the present application, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cutting insert, characterized by, The cutting insert comprises: two identical and oppositely arranged end surfaces (10) comprising two identical and oppositely arranged cutting regions (11) and a mounting surface (12) located between the two cutting regions (11), the cutting region (11) comprising a first cutting part (111), a second cutting part (112) and a third cutting part (113) arranged along the periphery of the end surface (10); a peripheral side surface (20) connecting the two end surfaces (10), the peripheral side surface (20) comprising two identical and oppositely arranged support surfaces (21) and two identical and oppositely arranged side surfaces (22) along a third direction (F3), the first cutting part (111) being connected to the support surface (21) and the side surface (22) and forming a first cutting edge (31) with the support surface (21), the second cutting part (112) being connected to the support surface (21) and forming a second cutting edge (32), the third cutting part (113) being connected to the side surface (22) and forming a third cutting edge (33), the first direction (F1), the second direction (F2) and the third direction (F3) intersecting each other, wherein in one of the end surfaces (10), the first cutting part (111) extends obliquely in the second direction (F2) away from the other cutting region (11) and in the third direction (F3) towards the other end surface (10), the second cutting part (112) extends obliquely in the second direction (F2) away from the other cutting region (11) and in the third direction (F3) away from the other end surface (10), and the third cutting part (113) extends obliquely in the second direction (F2) away from the other cutting region (11) and in the third direction (F3) away from the other end surface (10).

2. The cutting insert according to claim 1, wherein an angle between the first cutting edge (31) and the mounting surface (12) is a, an angle between the second cutting edge (32) and the mounting surface (12) is β, and an angle between the third cutting edge (33) and the mounting surface (12) is γ, wherein a < γ and / or β < γ.

3. The cutting insert according to claim 1, characterized in that, the mounting surface (12) has two first boundaries (121) and two second boundaries (122), the two first boundaries (121) being connected to the two first cutting parts (111) one by one, the two first boundaries (121) being parallel to each other and having a distance W1, the two second boundaries (122) being connected to the two second cutting parts (112) one by one, and the two second boundaries (122) being parallel to each other and having a distance W2, wherein 0.75 ≤ W1 / W2 ≤ 2.

4. The cutting insert according to claim 1, characterized in that, The mounting surface (12) has two second boundaries (122) and two third boundaries (123), the two second boundaries (122) are connected to the two second cutting portions (112) one by one, the two second boundaries (122) are parallel to each other and have a spacing W2, the two third boundaries (123) are connected to the two third cutting portions (113) one by one, the two third boundaries (123) are parallel to each other and have a spacing W3, wherein 1≤W3 / W2≤2.

5. The cutting insert according to claim 1, wherein The cutting blade (100) has a maximum dimension H along the first direction (F1), In the first direction (F1), the mounting surface (12) has a spacing H1 from an end of the first cutting portion (111) away from the mounting surface (12), 0.001≤H1 / H≤0.15; and / or, In the first direction (F1), the mounting surface (12) has a spacing H2 from an end of the second cutting portion (112) away from the mounting surface (12), 0.005≤H2 / H≤0.3; and / or, In the first direction (F1), the mounting surface (12) has a spacing H3 from an end of the third cutting portion (113) away from the mounting surface (12), 0.005≤H3 / H≤0.

3.

6. The cutting insert according to claim 1, wherein The cutting blade (100) has a maximum dimension H along the first direction (F1), and a maximum dimension W along the second direction (F2), The mounting surface (12) has a spacing H2 from an end of the second cutting portion (112) away from the mounting surface (12) in the first direction (F1), and has two first boundaries (121), the two first boundaries (121) are connected to the two first cutting portions (111) one by one, the two first boundaries (121) are parallel to each other and have a spacing W1, H2 / H 7. The cutting insert according to claim 1, wherein The cutting blade (100) has a maximum dimension W along the second direction (F2), and the mounting surface (12) has two first boundaries (121), the two first boundaries (121) are connected to the two first cutting portions (111) one by one, the two first boundaries (121) are parallel to each other and have a spacing W1, 0.5≤W1 / W≤1.

84.

8. The cutting insert according to claim 1, wherein, The cutting region (11) further comprises a corner cutting portion (114), the second cutting portion (112) and the third cutting portion (113) are connected through the corner cutting portion (114), the peripheral side surface (20) further comprises a first corner side surface (23) and an inclined side surface (25), the first corner side surface (23) is located between the support surface (21) and the side surface (22) and connected to the corner cutting portion (114) to form a fourth cutting edge (34), the inclined side surface (25) connects the support surface (21) and the second cutting edge (32), In a plane perpendicular to the first direction (F1), the first corner side surface (23) has a maximum dimension L1 perpendicular to the extension direction of the fourth cutting edge (34), and the bevel side surface (25) has a maximum dimension L2 perpendicular to the extension direction of the second cutting edge (32), wherein L1>L2.

9. The cutting insert according to any one of claims 1-8, wherein, The side surface (22) is provided with a recess (221) extending through the cutting insert (100) in the height direction, and an edge of the recess (221) in the first direction (F1) is located between the first cutting edge (31) of one of the cutting regions (11) and the third cutting edge (33) of another one of the cutting regions (11) and is connected to the third cutting edge (33).

10. A cutting tool characterized by The cutting tool (300) comprises a tool body (200) and the cutting insert (100) according to any one of claims 1-9, the cutting insert (100) is detachably mounted on the tool body (200) through the mounting hole (211) of the support surface (21), and the mounting surface (12) of the two end surfaces (10) is selectively in abutment with the tool body (200).

Images