Cutting blade and tool

Abstract

The present application relates to a cutting tool, and in particular to a cutting insert and tool. The cutting insert comprises an upper surface and a lower surface arranged opposite to each other, a front side surface connecting the upper surface and the lower surface, and a lateral side surface connecting the front side surface and the upper surface; a front cutting edge is formed at the intersection of the upper surface and the front side surface; a rake face is continuously provided on the upper surface along the front cutting edge; the rake face comprises a first rake face located in the middle of the front cutting edge and inclined in a direction away from the front cutting edge toward the lower surface, and a second rake face located on both sides of the first rake face and parallel to the horizontal plane or inclined in a direction away from the front cutting edge toward the lower surface; a chip groove is provided on the upper surface connected to the first rake face; the angle θ1 between the first rake face and the horizontal plane is greater than the angle θ2 between the second rake face and the horizontal plane. The cutting insert can achieve stable machining and good chip breaking, chip curling, chip wrapping, and chip removal effects under low feed machining.

Description

Technical Field

[0001] The present application relates to a cutting tool, and in particular to a cutting insert and a cutting tool. Background Art

[0002] The workpieces processed by cutting blades include materials with high-temperature red hardness and stickiness. Due to the high-temperature red hardness and stickiness of the processed materials, the tools are prone to aggravated grinding during the processing process, resulting in built-up edge and difficulty in chip breaking. Especially in the turning and grooving processes with low feed and small cutting depth, the cutting blades often have problems with chip curling and poor chip breaking performance, and aggravated crater wear and groove wear, thereby affecting the surface finish of the workpiece and the life of the blade.

[0003] To address these issues, existing cutting inserts primarily increase cutting edge sharpness by increasing rake and relief angles to reduce cutting resistance and build-up edge, while also utilizing chip flute designs to curl and break chips. However, this increased sharpness often results in a decrease in wear resistance. Furthermore, the chip breaker grooves of existing cutting inserts are positioned relatively far back to reduce cutting forces, resulting in an inability to achieve effective chip curling and wrapping. Furthermore, cutting inserts with this structural design can experience severe groove wear during turning operations. Summary of the Invention

[0004] In order to solve the deficiencies of the existing solutions mentioned in the above background technology, the present application provides a cutting insert and a tool, and the technical solutions thereof are as follows:

[0005] On the one hand, the present application provides a cutting blade, which includes an upper surface and a lower surface arranged opposite to each other, a front side surface connecting the upper surface and the lower surface, and a lateral side surface connecting the front side surface and the upper surface; a front cutting edge is formed at the intersection of the upper surface and the front side surface; a rake face is continuously provided on the upper surface along the front cutting edge; the rake face includes a first rake face located in the middle of the front cutting edge and inclined toward the lower surface in a direction away from the front cutting edge, and a rake face located in the middle of the front cutting edge

[0006] Second rake faces are provided on both sides of the first rake face and are parallel to the horizontal plane or inclined toward the lower surface in a direction away from the front cutting edge; the upper surface is provided with a chip groove connected to the first rake face;

[0007] An included angle θ1 between the first rake surface and the horizontal plane is greater than an included angle θ2 between the second rake surface and the horizontal plane.

[0008] In one embodiment, an included angle θ1 between the first rake surface and the horizontal plane is greater than or equal to 10° and less than or equal to 20°; an included angle θ2 between the second rake surface and the horizontal plane is greater than or equal to 0° and less than or equal to 2.5°.

[0009] In one embodiment, the second rake surface is along a direction away from the adjacent lateral side surface.

[0010] Inclined toward the lower surface.

[0011] In one embodiment, a transverse cutting edge is formed at the intersection of the upper surface and the transverse side surface; the transverse cutting edge is inclined toward the lower surface along a direction away from the front cutting edge.

[0012] In one embodiment, convex portions are respectively provided on both sides of the chip groove, and the convex portions are located on a side of the fifth second rake surface away from the front cutting edge.

[0013] In one embodiment, a chip anti-structure is provided on the upper surface; the chip anti-structure includes a chip anti-surface and an inner lateral chip anti-surface; the chip anti-surface is connected to the side of the second rake face away from the front cutting edge and is arranged around the chip groove; the second rake face and the chip anti-surface are connected to the chip groove

[0014] The intersection of the grooves is connected to the chip groove through an inner transverse anti-chip surface, and the inner transverse anti-chip surface is inclined toward the lower surface along the direction close to the chip groove; and / or the anti-chip structure includes an anti-chip surface and an outer transverse anti-chip surface; a transverse cutting edge is formed at the intersection of the upper surface and the transverse side surface; the second front cutting edge and the edge of the anti-chip surface close to the transverse cutting edge are connected to the upper surface through the outer transverse anti-chip surface, and the outer transverse anti-chip surface is inclined toward the lower surface along the direction close to the adjacent transverse cutting edge.

[0015] In one embodiment, a highest anti-chip convex portion is provided at the intersection of the anti-chip surface and the second front cutting edge; the highest anti-chip convex portion is transitionally connected to the second front cutting edge through an anti-chip arc surface, and a first intersection is formed at the intersection of the anti-chip arc surface and the second front cutting edge; along the direction away from the lateral side surface, the anti-chip arc surface is inclined toward the direction of the lower surface and extends to the chip groove, and along the direction away from the front cutting edge, it is inclined from the first intersection toward the direction of the upper surface and extends to the highest anti-chip convex portion.

[0016] In one embodiment, a boss structure is provided on both sides of the anti-chip surface, and a transverse cutting edge is formed at the intersection of the boss structure and the transverse side surface; the boss structure is inclined toward the lower surface along the direction away from the front cutting edge, and the height of the boss structure is lower than the height of the anti-chip surface.

[0017] In one embodiment, the boss structure is inclined toward the upper surface along a direction away from the adjacent transverse cutting edge; and / or the anti-chip structure and the boss structure are inclined toward the lower surface along a direction away from the front cutting edge, and along the direction away from the front cutting edge, the angle between the boss structure and the horizontal plane is δ, and the δ is greater than or equal to 1° and less than or equal to 3°.

[0018] Based on the above, compared with the existing solutions, the cutting insert provided by this application has at least the following technical effects:

[0019] The cutting blade of the present application utilizes the structural design of the first rake face and the second rake face. On the one hand, the rake angles formed by the first rake face and the second rake face are different. During the chip processing, the chips are formed into waveforms by the action of different rake angles, thereby improving the rigidity of the chips, facilitating the smooth discharge of the chips, and solving the problems of chip cutting, chip curling, chip wrapping and chip removal difficulties in grooving. On the other hand, in order to ensure the sharpness of the tool tip, the first rake face and the second rake face are designed to have the same inclination direction, which can make the chips gradually curl, increase the chip curvature, and reduce the force on the tool tip, thereby improving the cutting stability, cutting efficiency and effect. The cutting blade provided by the present application is suitable for low-feed processing. The cutting blade can achieve stable processing and good chip breaking, chip curling, chip wrapping and chip removal effects under low-feed processing.

[0020] On the other hand, the present application also provides a tool, which includes a tool body and the cutting blade as described above, wherein the cutting blade is mounted on the tool body.

[0021] Based on the above, compared with the existing solutions, the tool provided by the present application includes at least the following technical effects: the tool of the present application installs the above-mentioned cutting blade on the tool body, and uses the rotation of the tool body to drive the cutting of the cutting blade. The tool of the present application has the technical effects of the above-mentioned cutting blade, which will not be repeated here.

[0022] Other features and benefits of the present application will be described in the following description, and in part will become apparent from the description or be understood through practice of the present application. The objectives and other benefits of the present application can be achieved and obtained through the structures particularly pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams, unless otherwise specified.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a cutting blade provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 A partial enlarged view of

[0026] Figure 3 for Figure 1 The partial enlarged view of position D in the middle is viewed from the side;

[0027] Figure 4 A schematic diagram of the partial structure of the cutting insert provided in an embodiment of the present application in a front view direction;

[0028] Figure 5 A partial enlargement of the cutting blade provided in the embodiment of the present application in the top view Figure 1 ;

[0029] Figure 6 A partial enlargement of the cutting blade provided in the embodiment of the present application in the top view direction Figure 2 ;

[0030] Figure 7 for Figure 5 Section view along the AA section line Figure 1 ;

[0031] Figure 8 for Figure 5 Section view along the AA section line Figure 2 ;

[0032] Figure 9 for Figure 5 Sectional view along section line BB;

[0033] Figure 10 for Figure 5 Sectional view along CC line.

[0034] Reference numerals:

[0035] 100 upper surface, 200 lower surface, 300 front side, 400 transverse side, 110 front cutting edge, 120 transverse cutting edge, 130 first rake face, 140 anti-chip structure, 150 convex part, 160 chip groove, 170 boss structure, 141 second rake face, 142 anti-chip arc surface, 143 first intersection point, 144 highest convex part of anti-chip, 145 outer transverse anti-chip surface, 146 inner transverse anti-chip surface, 147 anti-chip surface, 1471 main anti-chip surface, 1472 branch anti-chip surface, 148 groove structure. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments; the technical features designed in different implementation modes of the present application described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that all terms used in this application (including technical terms and scientific terms) have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs, and should not be understood as limiting this application; it should be further understood that the terms used in this application should be understood to have the same meaning as these terms in the context of this specification and the relevant field, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in this application.

[0038] Please refer to Figure 1 Taking the front cutting edge 110 at one end of the cutting blade as an example, this article defines the direction in which the front cutting edge 110 at one end of the cutting blade moves toward the workpiece as the cutting direction, that is, the direction in which the front cutting edge 110 at one end is toward its front side surface 300; the direction opposite to the cutting direction is the backward direction; the left side direction of the cutting direction is defined as the left direction, and the right side direction is defined as the right direction; the direction in which the cutting blade points along the lower surface 200 toward the upper surface 100 is defined as the upward direction, and the opposite direction of the upward direction is defined as the downward direction.

[0039] It should be noted that the definition of various directions of the cutting blade in this article is based on the cutting direction. The definitions of other directions are only for the convenience of people's understanding and are marked according to the drawings of the embodiment. The terms "upward", "downward", "left", "right" and so on are only used according to the current illustration description and are not intended to limit or restrict it. It is well known that the cutting blade can also be used upside down, and the description of the up, down, left and right directions will change after upside down use.

[0040] Currently, existing cutting tools are prone to increased grinding during the machining process, resulting in built-up edge (BUE) and difficulty in chip breaking. Especially during turning and grooving operations with low feed rates and small depths of cut, cutting inserts often experience chip curling and poor chip breaking performance, as well as increased crater wear and groove wear. To address these issues, existing cutting inserts primarily increase the rake and clearance angles to reduce cutting resistance and the generation of BUE, and employ chip curling and chip breaking techniques through the design of a chip flute. However, existing cutting inserts with the aforementioned designs suffer from the inability to achieve good chip curling and encapsulation, reduced wear resistance, and particularly severe groove wear.

[0041] Therefore, the embodiments of the present application provide a cutting insert and a cutting tool suitable for low-feed machining to meet the machining requirements of such working conditions:

[0042] The present invention provides a tool comprising a tool body and a cutting blade for cutting a workpiece, wherein the cutting blade is mounted on the tool body. The tool is configured such that the cutting blade is mounted on the tool body 30 and the tool body rotates to drive the cutting of the cutting blade.

[0043] Regarding the cutting blade, the embodiment of the present application improves the cutting blade therein:

[0044] This application provides Figure 1-3 The embodiment shows a cutting blade, which includes an upper surface 100 and a lower surface 200 arranged opposite to each other, a front side surface 300 connecting the upper surface 100 and the lower surface 200, and a lateral side surface 400 connecting the front side surface 300 and the upper surface 100; a front cutting edge 110 is formed at the intersection of the upper surface 100 and the front side surface 300.

[0045] In order to solve the problems existing in the above-mentioned existing cutting tools, the embodiment of the present application creatively improves the design of the cutting blade structure: a rake face is continuously provided along the front cutting edge 110 on its upper surface 100; the rake face includes a first rake face 130 located in the middle of the front cutting edge 110 and inclined toward the lower surface 200 in the direction away from the front cutting edge 110, and a second rake face 141 located on both sides of the first rake face 130 and parallel to the horizontal plane or inclined toward the lower surface 200 in the direction away from the front cutting edge 110; the upper surface 100 is provided with a chip groove 160 connected to the first rake face 130; the angle θ1 between the first rake face 130 and the horizontal plane is greater than the angle θ2 between the second rake face 141 and the horizontal plane.

[0046] When the cutting insert of this embodiment is mounted on the cutter body of the tool, the cutting portion processes the workpiece along the cutting direction. The specific working process and principle are as follows:

[0047] like Figure 2 、7 As shown in Figure 8, the embodiment of the present application designs a dual rake face structure: a first rake face 130 is inclined in the direction away from the front cutting edge 110 toward the lower surface 200 (i.e., downward direction), which forms a positive rake angle. The second rake face 141 is designed on both sides of the first rake face 130, parallel to the horizontal plane or inclined in the direction away from the front cutting edge 110 (i.e., backward direction) toward the lower surface 200 (i.e., downward direction), and the angle θ1 between the first rake face 130 and the horizontal plane is greater than the angle θ2 between the second rake face 141 and the horizontal plane. The design of the first rake face 130 and the second rake face 141 at different angles at least includes the following mechanisms and effects:

[0048] The first rake face 130 and the second rake face 141 have different rake angles (θ1 is greater than θ2). During the chip cutting process, the chips are affected by different rake angles, and the chips form an inward concave shape at the first rake face 130 and an outward convex shape at the second rake face 141. The chips form a waveform. This type of structure can improve the rigidity of the chips, facilitate the smooth discharge of the chips, and solve the problems of chip cutting, chip curling, chip wrapping and chip removal difficulties in grooving processing.

[0049] In order to ensure the sharpness of the cutting edge, the embodiment of the present application is designed so that the first rake face 130 and the second rake face 141 have the same inclination direction (θ1 and θ2 are in the same direction). Compared with the existing known solutions: when the angle θ2 of the second rake face is negative, that is, the first rake face 130 and the second rake face 141 have opposite inclination directions (θ1 and θ2 are in opposite directions). The solution of the present application is designed so that the angles of the first rake face 130 and the second rake face 141 are different, but the inclination directions of the two are consistent, which can make the chips gradually curl, the chip curvature become larger, and the force on the cutting edge become smaller, thereby improving the processing stability of the cutting blade while reducing the friction force on the second rake face 141, thereby increasing the service life of the blade.

[0050] The structural design of the embodiment of the present application facilitates the smooth discharge of chips, solving the problems of chip cutting, chip curling, chip wrapping, and chip removal difficulties during grooving. Furthermore, its structural design enables the chips to gradually curl, increasing the chip curvature and reducing the force on the tool tip, thereby improving cutting efficiency and effectiveness. Taking into account the performance improvements of the cutting inserts described above, the cutting inserts provided by the present application are suitable for low-feed machining, achieving stable machining and good chip breaking, chip curling, chip wrapping, and chip removal performance under low-feed machining.

[0051] Exemplarily, the angle θ1 between the first rake surface 130 and the horizontal plane is greater than or equal to 10° and less than or equal to 20°, that is, the angle θ1 is between 10° and 20°; the angle θ2 between the second rake surface 141 and the horizontal plane is greater than or equal to 0° and less than or equal to 2.5°, that is, the angle θ2 is between 0° and 2.5°.

[0052] In order to ensure the sharpness of the blade tip, θ1 is designed to be greater than or equal to 10° and less than or equal to 20°.

[0053] Optionally, the front cutting edge 110 includes a first sub-cutting edge and a second sub-cutting edge, wherein the first sub-cutting edge is formed by the first rake face 130 and the front side face 300, and the second sub-cutting edge is formed by the second rake face 141 and the front side face 300. The width of the first sub-cutting edge is smaller than the width of the second sub-cutting edge. Exemplarily, the width W1 of the second front sub-cutting edge accounts for 20% to 30% of the width W of the front cutting edge 110.

[0054] The above-described design of the dimensions of the second rake face 141 allows for a sufficiently large width for the first rake face 130. Since the first rake face 130 is connected to the chip flute 160, this design allows for a large space in the chip flute 160 and a large connecting channel. The specific values ​​of the aforementioned parameters W1 can be adjusted by those skilled in the art based on actual needs and machining objectives using the above formulas, and are not limited here.

[0055] Among them, such as Figure 3 、 5 As shown in FIG-6 , the width W of the front cutting edge 110 is defined as the width of the front cutting edge 110 measured when the front cutting edge 110 is projected downwardly, with the leftward or rightward straight line as the direction of measurement. This is the distance between the intersections of the two transverse cutting edges 120 and the front side surface 300. Similarly, the width W1 of the second sub-front cutting edge is defined as the width of the second sub-front cutting edge measured when the leftward or rightward straight line is projected downwardly. The width of the first sub-front cutting edge is defined as the width of the first sub-front cutting edge measured when the leftward or rightward straight line is projected downwardly.

[0056] Optionally, the second rake surface 141 is inclined toward the lower surface 200 along a direction away from the adjacent lateral side surface 400 .

[0057] like Figure 4As shown, the second rake face 141 is inclined toward the lower surface 200 along a direction away from the adjacent lateral side 400, that is, along a straight line of the left and right directions, the second rake face 141 on the left is inclined to the right and downward, and the second rake face 141 on the right is inclined to the left and downward, so that the second rake face 141 is inclined toward the chip groove 160. In conjunction with the design of different rake angles of the first rake face 130 and the second rake face 141, the first rake face 130 and the second rake face 141 form a three-dimensional curved surface structure with the chip groove 160, forming an anti-chip angle. Through the above design, the generated chips are deformed, which is beneficial to the discharge of the chips, further solving the problems of chip cutting, chip curling, chip wrapping and chip removal difficulties in grooving.

[0058] Optionally, the first rake face 130 and the second rake face 141 jointly form the front cutting edge 110 , and the two are the same straight edge.

[0059] Alternatively, refer to Figure 3 A transverse cutting edge 120 is formed at the intersection of the upper surface 100 and the transverse side surface 400. The transverse cutting edge 120 is inclined toward the lower surface 200 in a direction away from the front cutting edge 110 (i.e., inclined downward in a rearward direction). For example, the angle between the transverse cutting edge 120 and the horizontal plane is δ, and δ is greater than or equal to 1° and less than or equal to 3°.

[0060] like Figure 3 As shown, the inclination angle design of the transverse cutting edge 120 tilted toward the lower surface 200 away from the front cutting edge 110 guides the chips and controls the chip removal direction toward the unprocessed workpiece surface, which is beneficial to improving the chip removal effect.

[0061] Alternatively, as Figure 1-3 As shown, convex portions 150 are respectively provided on both sides of the chip groove 160 , and the convex portions 150 are located on the side of the second rake surface 141 away from the front cutting edge 110 .

[0062] The protrusion 150 is designed to be located on the chip groove 160. It serves as a friction-reducing point, supporting and guiding the chips generated during the cutting process. It also reduces friction between the chips and the first and second rake faces 130 and 141, increasing the heat dissipation area. This design ensures the sharpness of the cutting edge while extending the tool's service life.

[0063] Alternatively, as Figure 6 、 9-10, an anti-chip structure 140 is provided on the upper surface 100; the anti-chip structure 140 includes an anti-chip surface 147 and an inner lateral anti-chip surface 146; the anti-chip surface 147 is connected to the side of the second front cutting edge 141 away from the front cutting edge 110, and is arranged around the chip groove 160; the intersection of the second front cutting edge 141 and the anti-chip surface 147 and the chip groove 160 is connected to the chip groove 160 through the inner lateral anti-chip surface 146, and the inner lateral anti-chip surface 146 is inclined toward the direction of the lower surface 200 along the direction close to the chip groove 160.

[0064] Optionally, the anti-chip structure 140 also includes an outer lateral anti-chip surface 145; a transverse cutting edge 120 is formed at the intersection of the upper surface 100 and the lateral side surface 400; the second front cutting surface 141 and the anti-chip surface 147 are connected to the upper surface 100 at the edge close to the transverse cutting edge 120 through the outer lateral anti-chip surface 145, and the outer lateral anti-chip surface 145 is inclined toward the direction of the lower surface 200 along the direction close to the adjacent transverse cutting edge 120.

[0065] The outer transverse anti-chip surface 145 is designed to be inclined (i.e., downwardly inclined) toward the lower surface 200 along the direction adjacent to the adjacent transverse cutting edge 120, thereby providing a chip-repelling effect on the transversely cut chips. The inner transverse anti-chip surface 146 is designed to be inclined (i.e., downwardly inclined) toward the lower surface 200 along the direction adjacent to the chip groove 160, thereby providing a chip-wrapping effect on the chips from the grooving process, causing them to extend inward. The structural design of the outer transverse anti-chip surface 145 and the inner transverse anti-chip surface 146 allows the chips to be wrapped inward during the machining process, thereby reducing the radius of curvature of the chip curling and improving the chip breaking effect.

[0066] Alternatively, as Figure 7 、 9 -10, a highest anti-chip convex portion 144 is provided at the intersection of the anti-chip surface 147 and the second front cutting edge 141; the highest anti-chip convex portion 144 is transitionally connected to the second front cutting edge 141 through the anti-chip arc surface 142, and a first intersection 143 is formed at the intersection of the anti-chip arc surface 142 and the second front cutting edge 141; along the direction away from the lateral side surface 400, the anti-chip arc surface 142 is inclined toward the direction of the lower surface 200 and extends to the chip groove 160, and is inclined upward from the first intersection 143 along the direction away from the front cutting edge 110 and extends to the highest anti-chip convex portion 144.

[0067] Exemplarily, the anti-chip arc surface 142 is inclined downward in the direction away from the lateral side surface 400, and the inclination angle is ξ, that is, in the direction away from the lateral side surface 400, the angle between the anti-chip arc surface 142 and the horizontal plane is ξ, and ξ is greater than or equal to 1° and less than or equal to 4°.

[0068] Alternatively, refer to Figure 6The anti-chip surface 147 includes a main anti-chip surface 1471 located on the rear side of the chip groove 160, and two branch anti-chip surfaces 1472 extending from the second front cutting edge 141 to the main anti-chip surface 1471 and located on both sides of the chip groove 160, so that the anti-chip surface 147 is arranged around the rear side of the chip groove 160, wherein the highest anti-chip convex portion 144 is formed at the intersection of the branch anti-chip surface 1472 and the second front cutting edge 141.

[0069] For example, Figure 7-8 As shown, the distance from the first intersection point 143 to the front cutting edge 110 is L, wherein L is greater than or equal to 0.6 mm and less than or equal to ≤0.8 mm.

[0070] Alternatively, as Figure 1 、 2 As shown in FIG. 5 , a boss structure 170 is provided on both sides of the anti-chip surface 147. The intersection of the boss structure 170 and the lateral side surface 400 forms a transverse cutting edge 120. The boss structure 170 is inclined in the direction away from the front cutting edge 110 toward the lower surface 200, and the height of the boss structure 170 is lower than the height of the anti-chip surface 147. The height of the anti-chip structure 140 is designed to be higher than the height of the boss structure 170, so that when the cutting blade performs transverse cutting, the chips generated by the cutting tool will first be affected by the boss structure.

[0071] The chip guide effect of 170 causes the chips to move toward the anti-chip structure 140. Then, since the height of the anti-chip surface 147 is higher than that of the boss structure 170, the outer side anti-chip surface 145 of the anti-chip structure 140 can contact the chips.

[0072] The outer side of the anti-chip structure 140 (ie, the outer side transverse anti-chip surface 145) performs a secondary anti-chip treatment on the chips, wherein the outer side transverse anti-chip surface 145 performs a chip curling action on the chips, thereby improving the cutting speed.

[0073] The chip curling effect of the blade.

[0074] Furthermore, the first and second sub-cutting edges formed by the first rake face 130 and the second rake face 141 and the front side surface 300 are sharp, which is beneficial to ensure the sharpness of the cutting edge.

[0075] In the embodiment of the application, a boss structure 170 is provided on both sides of the first rake face 130 and the second rake face 141 in the rearward direction. The arrangement of the boss structure 170 is beneficial to the overall thickness of the cutting portion of the cutting blade (in terms of

[0076] The blade width is increased (with the upward and downward directions being the measurement reference), i.e., a reinforced blade width is provided in the rear half of the front cutting edge 110. This design ensures sufficient cutting edge sharpness at the first rake face 130 and the second rake face 141 while enhancing the structural strength of the cutting area, thereby increasing the service life of the cutting insert and reducing notch wear.

[0077] Optionally, a groove structure 148 is provided at the intersection of the anti-chip surface 147 and the boss structure 170.

[0078] The anti-chip surface 147 extends through the outer transverse anti-chip surface 145 to transition to the groove structure 148, and

[0079] The boss structure 170 extends to the groove structure 148 through a transition surface.

[0080] like Figure 2 、 Figure 6 As shown, when in use, the chips generated by the cutting tool will first be impacted by the boss structure 170

[0081] The chip guides the chips to move toward the anti-chip structure 140. Then, since the height of the anti-chip surface 147 is higher than the boss structure 170, the outer lateral anti-chip surface 145 of the anti-chip structure 140 can contact the chips.

[0082] The groove structure 148 is provided so that the chips tend to curl downward when entering the groove structure 148 , and then the chips are rolled up through the outer transverse chip reversing surface 145 , further improving the chip rolling effect of the cutting insert.

[0083] Alternatively, as Figure 10 As shown, the boss structure 170 is inclined toward the upper surface 100 in a direction away from the adjacent transverse cutting edge 120. For example, along the direction away from the adjacent transverse cutting edge 120, the angle between the boss structure 170 and the horizontal plane is ε, and ε is greater than or equal to 0.5°.

[0084] And less than or equal to 3°.

[0085] During transverse turning, the transverse cutting edge 120 is used as the turning front angle to cut the workpiece, and the chips are then subjected to the action of the boss structure 170 and come to the outer transverse chip anti-chip surface 145 of the anti-chip structure 140.

[0086] The design of the transverse cutting edge 120 being tilted upward away from the adjacent transverse cutting edge 120 increases the cutting edge strength of the transverse cutting edge 120, thereby increasing the tool life. The inclined surface formed by the boss structure 170 guides the chips, allowing them to be discharged smoothly. At the same time, this design can reduce groove wear.

[0087] 0 Optionally, as Figure 2 、 7 -8, the anti-chip structure 140 and the boss structure 170 are away from the front cutting

[0088] The direction of the edge 110 is inclined toward the lower surface 200. Exemplarily, along the direction away from the front cutting edge 110, the included angle between the boss structure 170 and the horizontal plane is δ, and δ is greater than or equal to 1° and less than or equal to 3°.

[0089] Since the cross cutting edge 120 is formed at the intersection of the boss structure 170 and the lateral side surface 400, the cross cutting edge 1205 is inclined toward the lower surface 200 in the direction away from the front cutting edge 110, the boss structure 170 adopts

[0090] Synchronous downward tilt design; in addition, the anti-chip structure 140 is also tilted downward away from the front cutting edge 110. During transverse turning, this structural design can guide the chips and make them flow to the unmachined workpiece surface.

[0091] It should be noted that: in the direction away from the front cutting edge 110, the angle between the transverse cutting edge 120 and the horizontal plane 0 is δ, and the angle between the boss structure 170 and the horizontal plane is also δ. For example, δ is greater than or equal to

[0092] greater than 1° and less than or equal to 3°.

[0093] For knives:

[0094] The tool comprises a tool body and a cutting blade for cutting a workpiece, wherein the cutting blade is mounted on the tool body. It should be noted that in specific applications, the tool body may be mounted with one or more cutting blades, and the mounted cutting blades may be of the same type and structure or different.

[0095] The tool of the present application has the technical effects of the above-mentioned cutting blades, which will not be described in detail here.

[0096] It should be noted that:

[0097] like Figure 5 As shown, the cutting blade of the embodiment of the present application is symmetrically arranged along the plane where the AA section is located. The cutting blade shown in this embodiment is only a preferred embodiment of the present application and does not impose any form of limitation on the present application. The cutting portion of the present application may not be symmetrical along the above-mentioned plane.

[0098] In this embodiment, the cutting blade as a whole adopts a rectangular "I"-shaped structure, and cutting parts with two front cutting surfaces and chip grooves 160 as described above are provided at both ends of the "I" shape. The cutting blade shown in this embodiment is only a preferred embodiment of the present application and does not impose any formal restrictions on the present application. The present application is not limited to setting two cutting parts.

[0099] It can be understood that the cutting blades shown in this embodiment and its drawings are only examples. According to the above design concept, based on the structure and usage process of the above-mentioned cutting part, the cutting blade as a whole can also adopt other structural designs, and the number and setting positions of the cutting parts can be adjusted accordingly. For example, the cutting blade as a whole adopts a "cross" structure or an "L" shape structure, and a cutting part is set at its end, including but not limited to the scheme shown in the embodiment.

[0100] In some embodiments, the cutting insert may adopt a cemented carbide substrate, and optionally, various functional or decorative coatings may be coated on the surface of the cutting insert to improve the performance of the cutting insert.

[0101] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present application may be improved in only one or several aspects, without having to simultaneously solve all the technical problems listed in the prior art or background art. Those skilled in the art should understand that the absence of any content in a claim should not be construed as a limitation on that claim.

[0102] Although terms such as front cutting edge, transverse side, and transverse cutting edge are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cutting insert comprising an upper surface (100) and a lower surface (200) arranged opposite to each other, a front side surface (300) connecting the upper surface (100) and the lower surface (200), and a lateral side surface (400) connecting the front side surface (300) and the upper surface (100); characterized in that: A front cutting edge (110) is formed at the intersection of the upper surface (100) and the front side surface (300); A rake face is continuously provided on the upper surface (100) along the front cutting edge (110); the rake face comprises a first rake face (130) located in the middle of the front cutting edge (110) and inclined in a direction away from the front cutting edge (110) toward the lower surface (200), and a second rake face (141) located on both sides of the first rake face (130) and parallel to a horizontal plane or inclined in a direction away from the front cutting edge (110) toward the lower surface (200); the upper surface (100) is provided with a chip groove (160) connected to the first rake face (130); An included angle θ1 between the first rake face (130) and the horizontal plane is greater than an included angle θ2 between the second rake face (141) and the horizontal plane; An anti-chip structure (140) is provided on the upper surface (100); the anti-chip structure (140) includes an anti-chip surface (147) and an outer transverse anti-chip surface (145); boss structures (170) are provided on both sides of the anti-chip surface (147), and a transverse cutting edge (120) is formed at the intersection of the boss structure (170) and the transverse side surface (400); the boss structure (170) is inclined in a direction away from the front cutting edge (110) toward the lower surface, and the height of the boss structure (170) is lower than the height of the anti-chip surface (147); The edges of the second front cutting edge (141) and the anti-chip surface (147) close to the transverse cutting edge (120) are connected to the upper surface (100) through the outer transverse anti-chip surface (145); the anti-chip structure (140) and the boss structure (170) are inclined toward the lower surface (200) in a direction away from the front cutting edge (110); a groove structure (148) is provided at the intersection of the anti-chip surface (147) and the boss structure (170), the anti-chip surface (147) extends through the outer transverse anti-chip surface (145) to transition to the groove structure (148), and the boss structure (170) extends to the groove structure (148) through the transition surface.

2. The cutting insert according to claim 1, wherein: An included angle θ1 between the first rake face (130) and the horizontal plane is greater than or equal to 10° and less than or equal to 20°; An included angle θ2 between the second rake face (141) and the horizontal plane is greater than or equal to 0° and less than or equal to 2.5°.

3. The cutting insert according to claim 1, wherein: The second rake surface (141) is inclined in a direction away from the adjacent lateral side surface (400) and in a direction toward the lower surface (200).

4. The cutting insert according to claim 1, wherein: A transverse cutting edge (120) is formed at the intersection of the upper surface (100) and the transverse side surface (400); The transverse cutting edge (120) is inclined in a direction away from the front cutting edge (110) and toward the lower surface (200).

5. The cutting insert according to claim 1, wherein: A convex portion (150) is provided on both sides of the chip groove (160), and the convex portion (150) is located on a side of the second rake face (141) away from the front cutting edge (110).

6. The cutting insert according to claim 1, wherein: An anti-chip structure (140) is provided on the upper surface (100); The anti-chip structure (140) includes an anti-chip surface (147) and an inner transverse anti-chip surface (146); the anti-chip surface (147) is connected to the side of the second front cutting edge (141) away from the front cutting edge (110), and is arranged around the chip groove (160); the intersection of the second front cutting edge (141) and the anti-chip surface (147) with the chip groove (160) is connected to the chip groove (160) through the inner transverse anti-chip surface (146), and the inner transverse anti-chip surface (146) is inclined toward the lower surface (200) along a direction close to the chip groove (160); And / or, the anti-chip structure (140) includes an anti-chip surface (147) and an outer transverse anti-chip surface (145); a transverse cutting edge (120) is formed at the intersection of the upper surface (100) and the transverse side surface (400); the edges of the second front cutting surface (141) and the anti-chip surface (147) close to the transverse cutting edge (120) are connected to the upper surface (100) through the outer transverse anti-chip surface (145), and the outer transverse anti-chip surface (145) is inclined toward the lower surface (200) along the direction close to the adjacent transverse cutting edge (120).

7. The cutting insert according to claim 6, wherein: A highest anti-chip convex portion (144) is provided at the intersection of the anti-chip surface (147) and the second rake surface (141); The highest anti-chip convex portion (144) is transitionally connected to the second front cutting edge (141) through the anti-chip arc surface (142), and the intersection of the anti-chip arc surface (142) and the second front cutting edge (141) forms a first intersection (143); in the direction away from the lateral side surface (400), the anti-chip arc surface (142) is inclined toward the lower surface (200) and extends to the chip groove (160), and in the direction away from the front cutting edge (110), it is inclined from the first intersection (143) toward the upper surface (100) and extends to the highest anti-chip convex portion (144).

8. The cutting insert according to claim 1, wherein: The anti-chip structure (140) and the boss structure (170) are inclined toward the lower surface (200) in a direction away from the front cutting edge (110), and along the direction away from the front cutting edge (110), the angle between the boss structure (170) and the horizontal plane is δ, and the δ is greater than or equal to 1° and less than or equal to 3°.

9. A cutting tool, characterized in that: The utility model comprises a tool body and a cutting insert according to any one of claims 1 to 8, wherein the cutting insert is mounted on the tool body.

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