Cutting insert and cutting tool

Abstract

The utility model discloses a cutting blade and a cutting tool. The cutting blade comprises a top surface, a bottom surface, a tool nose and a margin surface layer, a front tool face is arranged at the end of the top face, the edge area, exposed out of the bottom face, of the bottom of the front tool face comprises a rear tool face and an auxiliary rear tool face, the rear tool face is located at the end away from the center of the cutting blade, and a main cutting edge is formed between the rear tool face and the front tool face. An auxiliary rear cutting edge is formed by the auxiliary rear tool face and the front tool face; the tool nose is formed at the transition position of the main cutting edge and the auxiliary rear cutting edge. At least part of the edge strip surface layer is arranged at the tool nose, and the edge strip surface layer extends in the direction away from the main cutting edge from the tool nose. According to the cutting blade disclosed by the utility model, one end of the edge strip surface layer is arranged at the tool nose, so that the strength of the tool nose can be enhanced, and the risk of easy breakage in the cutting process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical cutting, in particular to a cutting blade and a cutting tool. Background Art

[0002] In machining, different tools are usually used to remove the surplus of the end face, outer circle, inner hole, groove and other parts of the blank or semi-finished product according to the forming requirements of the parts, so as to obtain a product with precise dimensions.

[0003] During actual operation, the cutting blade can perform transverse cutting and longitudinal cutting on the workpiece to be machined. In the prior art, the strength at the tip of the cutting blade is weak and it is prone to chipping during the cutting process. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a cutting blade, one end of the surface layer of the land is arranged at the tip position, which can strengthen the strength at the tip and reduce the risk of chipping easily during the cutting process.

[0005] The cutting blade according to an embodiment of the utility model includes: a top surface, a bottom surface, a tip and a surface layer of the land; a rake face is provided at the end of the top surface, and the bottom of the rake face is exposed outside the edge area of the bottom surface and includes a flank and a secondary flank. The flank is located at the end far from the center of the cutting blade, and a main cutting edge is formed between the flank and the rake face. The secondary flank and the rake face form a secondary cutting edge; the tip is formed at the transition between the main cutting edge and the secondary cutting edge; at least part of the surface layer of the land is arranged at the tip, and the surface layer of the land extends from the tip in a direction away from the main cutting edge.

[0006] The cutting blade according to an embodiment of the utility model includes a main cutting edge and a secondary cutting edge. A tip is formed at the transition between the main cutting edge and the secondary cutting edge. At least part of the surface layer of the land is arranged at the tip and extends from the tip in a direction away from the main cutting edge. The surface layer of the land can strengthen the position of the tip, improve the strength of the tip, and thus reduce the risk of chipping easily during the cutting process.

[0007] For the cutting blade according to an embodiment of the utility model, the outer periphery of the tip is of an arc-shaped structure, and the position where the surface layer of the land is connected to the tip is of an arc-shaped structure.

[0008] According to the cutting blade of the embodiment of the present utility model, the rake face includes a groove structure, the groove structure includes a middle chip evacuation groove and side grooves located on both sides of the middle chip evacuation groove, the middle chip evacuation groove opens towards the main cutting edge, the side grooves open towards the secondary flank cutting edge, when the cutting blade is suitable for longitudinal cutting, the main cutting edge is used for machining the workpiece, and the middle chip evacuation groove is used for accommodating cutting chips and extruding the cutting chips to break, when the cutting blade is suitable for transverse cutting, the secondary flank cutting edge is used for cutting the workpiece, and the side grooves are used for accommodating cutting chips and extruding the cutting chips to break.

[0009] According to the cutting blade of the embodiment of the present utility model, one side of the side groove facing the secondary flank cutting edge includes a first side cutting deflection surface, the middle chip evacuation groove includes a second side cutting deflection surface, and the second side cutting deflection surface and the first side cutting deflection surface are opposite to each other along the inner and outer directions of the middle chip evacuation groove.

[0010] According to the cutting blade of the embodiment of the present utility model, a cutting groove inclined surface is connected to the lower side of the first side cutting deflection surface, and the cutting groove inclined surface is adjacent to and connected to the flank surface layer.

[0011] According to the cutting blade of the embodiment of the present utility model, a two-sided convex structure is formed between the middle chip evacuation groove and the side grooves on both sides, and one side of each convex structure facing the main cutting edge includes a front cutting deflection surface.

[0012] According to the cutting blade of the embodiment of the present utility model, the front cutting deflection surface is configured as a concave arch shape that is recessed away from the main cutting edge.

[0013] According to the cutting blade of the embodiment of the present utility model, the middle chip evacuation groove further includes an anti-chip platform, the anti-chip platform is configured as an inclined surface, and one end of the inclined surface close to the main cutting edge is lower than the end far from the main cutting edge.

[0014] According to the cutting blade of the embodiment of the present utility model, the middle chip evacuation groove further includes a third side cutting deflection surface, the third side cutting deflection surface is adjacent to the second side cutting deflection surface and is adjacent to the anti-chip platform.

[0015] According to the cutting tool of the embodiment of the present utility model, it includes a tool shank, a pressing connecting piece and the above-mentioned cutting blade, the tool shank is provided with an open installation groove, one side of the tool shank in the installation groove is the first pressing part of the cutting blade, the other side of the tool shank in the installation groove is the second pressing part, and the first pressing part and the second pressing part are opposite to each other, the cutting blade is suitable for being installed in the installation groove, and the pressing connecting piece is connected to the tool shank and presses the first pressing part and the first pressing part, so as to press the cutting blade.

[0016] The described cutting tool not only has the effect of enhancing the strength at the tip of the cutting blade, but also facilitates the disassembly between the cutting blade and the tool shank. The length and shape of the tool shank can be designed according to the actual workpiece to be machined, which can improve the applicability of the cutting tool.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram after the cutting blade and the tool shank of the embodiment of the present utility model are installed;

[0020] Figure 2 is of the embodiment of the present utility model Figure 1 an enlarged schematic view of part A;

[0021] Figure 3 is a schematic view of the cutting blade including the rake face of the embodiment of the present utility model;

[0022] Figure 4 is of the embodiment of the present utility model Figure 3 a schematic view of the back;

[0023] Figure 5 is a top view of the cutting blade of the embodiment of the present utility model;

[0024] Figure 6 is of the embodiment of the present utility model Figure 5 a sectional view taken along line B-B;

[0025] Figure 7 is a side view of the cutting blade of the embodiment of the present utility model;

[0026] Figure 8 is a three-dimensional structural schematic view of the cutting blade of the embodiment of the present utility model.

[0027] Reference numerals:

[0028] Cutting blade 100, guiding relief groove 101, tool shank 200, first pressing portion 201, second pressing portion 202, mounting groove 203, upper V-shaped groove 204, bottom V-shaped groove 205, cutting tool 300,

[0029] Top surface 1, front cutting surface 2, surface layer of cutting edge land 21, side groove 22, first side cutting deflection surface 221, inclined surface of cutting groove 222, middle chip evacuation groove 23, second side cutting deflection surface 231, front cutting deflection surface 232, third side cutting deflection surface 233, chip evacuation inclined surface 234, chip breaker platform 235, side surface of chip breaker platform 236, chip evacuation channel 237, convex structure 24, circumferential side surface 3, edge region 4, back cutting surface 41, auxiliary back cutting surface 42, tool tip 43, bottom surface 5, main cutting edge 6, auxiliary back cutting edge 7, pressing connecting part 8. Detailed implementation mode

[0030] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Next, refer to Figures 1 - 8Described is a cutting blade 100 according to an embodiment of the present utility model. One end of the land surface layer 21 is at least partially disposed at the tool tip 43, which can enhance the strength at the tool tip 43 and reduce the risk of chipping easily during cutting. When the cutting blade 100 is used for longitudinal cutting, the cuttings produced are in the shape of a spiral disc with a wavy cross-section, facilitating the orderly formation of the cuttings and preventing the cuttings from flying randomly and affecting the cutting effect. Additionally, when the cutting blade 100 is used for transverse turning, the cuttings produced are short chips, enabling a stable cutting process and small fluctuations in the cutting force. The cutting blade 100 controls the chip shape by setting the rake face 2 with a groove structure, making it easy for the cuttings to be discharged in a semi-closed cutting environment.

[0034] As Figures 1 - 8 shown, a cutting blade 100 according to an embodiment of the present utility model includes: a top surface 1, a bottom surface 5, a tool tip 43, and a land surface layer 21.

[0035] Among them, a rake face 2 is provided at the end of the top surface 1. The bottom of the rake face 2 is exposed at the edge region 4 of the bottom surface 5 and includes a flank face 41 and a secondary flank face 42. The flank face 41 is located at the end far from the center of the cutting blade 100, and a main cutting edge 6 is formed between the flank face 41 and the rake face 2. A secondary cutting edge 7 is formed between the secondary flank face 42 and the rake face 2. The tool tip 43 is formed at the transition between the main cutting edge 6 and the secondary cutting edge 7. The land surface layer 21 is at least partially disposed at the tool tip 43 and extends from the tool tip 43 in a direction away from the main cutting edge 6.

[0036] In practice, when the cutting blade 100 is performing a cutting operation, the top surface 1 is located above, the bottom surface 5 is located below, the region between the top surface 1 and the bottom surface 5 is the circumferential side surface 3, and the rake face 2 is provided at the end of the top surface 1. For example, rake faces 2 are provided at both ends of the cutting blade 100, so that in actual operation, cutting can be performed through either end. Of course, a rake face 2 can also be provided at one end of the top surface 1 of the cutting blade 100. During operation, the rake face 2 is always close to the workpiece to be machined for cutting.

[0037] In addition, the rake face 2 can be connected to other areas of the top surface 1 by a transition arc. The transition arc can avoid stress concentration during cutting and effectively improve the rigidity strength of the cutting blade 100. Specifically, the bottom edge area 4 of the rake face 2 includes a flank face 41 and a secondary flank face 42. In practice, from the perspective of the bottom surface 5, the position where the bottom of the rake face 2 is exposed outside the bottom surface 5 is the bottom edge area 4 of the rake face 2. The end of the bottom edge area 4 far from the center position of the cutting blade 100 is the flank face 41, and the two sides of the flank face 41 are the secondary flank faces 42. A main cutting edge 6 is formed between the flank face 41 and the rake face 2, and a secondary cutting edge 7 is formed between the secondary flank face 42 and the rake face 2. The main cutting edge 6 and the secondary cutting edge 7 are the relatively sharp positions during cutting work and mainly cut the workpiece to be machined.

[0038] Furthermore, a tool tip 43 is formed at the junction between the main cutting edge 6 and the secondary cutting edge 7. The tool tip 43 plays an important role during cutting, responsible for coordinating the work of the main cutting edge 6 and the secondary cutting edge 7 to ensure the smooth progress of the cutting process. In the embodiment of the present utility model, there is a land surface layer 21. One end of the land surface layer 21 is at least partially disposed at the tool tip 43 and extends from the tool tip 43 in a direction away from the main cutting edge 6. That is, the land surface layer 21 has a strengthening effect on the tool tip 43. At the same time, the land surface layer 21 extends backward and is located at the edge position, and can also strengthen the position of the secondary cutting edge 7.

[0039] Thus, by setting one end of the land surface layer 21 of the embodiment of the present utility model at the position of the tool tip 43, the strength of the tool tip 43 can be enhanced, and the risk of chipping easily occurring during cutting can be reduced.

[0040] In some embodiments, the outer periphery of the tool tip 43 is an arc-shaped structure, and the position where the land surface layer 21 is connected to the tool tip 43 is an arc-shaped structure.

[0041] First of all, the arc-shaped tool tip 43 is relatively smooth. Compared with the traditional tool tip 43, it can reduce the resistance and friction during cutting, and can prevent stress concentration, thereby further reducing the risk of cracking of the tool tip 43 during work. In addition, by setting part of the land surface layer 21 as an arc shape and fitting it with the arc-shaped tool tip 43, while improving the strength of the tool tip 43, it can cooperate with the shape of the tool tip 43, enhance the strength of the tool tip 43 and prevent stress concentration at the tool tip 43, further reducing the risk of cracking of the tool tip 43.

[0042] Further, the surface layer 21 of the flank gradually widens from the end near the main cutting edge 6 to the end away from the main cutting edge 6. That is, the side near the main cutting edge 6 cooperates with the tool tip 43 and adapts to the shape of the tool tip 43. As the surface layer 21 of the flank gradually extends in the direction away from the main cutting edge 6, the strength at the position away from the tool tip 43 can be enhanced, and the strength of the secondary relief edge 7 can also be enhanced.

[0043] In some embodiments, the rake face 2 includes a groove structure. The groove structure includes a central chip groove 23 and side grooves 22 located on both sides of the central chip groove 23. The central chip groove 23 opens towards the main cutting edge 6, and the side grooves 22 open towards the secondary relief edge 7. When the cutting insert 100 is suitable for longitudinal cutting, the main cutting edge 6 is used for machining the workpiece, and the central chip groove 23 is used for accommodating the chips and squeezing the chips until they break. When the cutting insert 100 is suitable for transverse cutting, the secondary relief edge 7 is used for machining the workpiece, and the side grooves 22 are used for accommodating the chips and squeezing the chips until they break.

[0044] In practice, setting the rake face 2 to include multiple groove structures can leave a cutting space during the cutting process, and at the same time leave a space for accommodating the chips, so as to better discharge the chips. Refer to Figure 5 and Figure 8 As shown, the side grooves 22 are symmetrically arranged on both sides of the central chip groove 23. When the cutting insert 100 performs transverse cutting, where the transverse cutting is to move the cutting insert 100 along the length direction for cutting. At this time, the secondary relief edge 7 on the side is used for cutting, and the chips generated by the cutting can be pressed against the wall surface of the side groove 22 until they break, etc. At the same time, the side groove 22 can accommodate the chips, and the side groove 22 opens towards the side of the secondary relief edge 7. Then, while the side groove 22 accommodates the chips, it can also make the chips discharge towards the open end.

[0045] Of course, during actual operation, the cutting can be performed using the secondary relief edge 7 on one side, or the cutting can be performed simultaneously using the secondary relief edges 7 on both sides.

[0046] In addition, when the cutting insert 100 performs longitudinal cutting, it means that the cutting insert 100 moves up and down longitudinally for cutting. For example, if the workpiece to be machined is a cylindrical structure, the longitudinal cutting is a cutting method of cutting the cylindrical structure along the radial direction. During longitudinal cutting, the chips can be discharged into the central chip groove 23, and the central chip groove 23 opens towards the side of the main cutting edge 6. Then, after the chips are squeezed into the central chip groove 23, they can be discharged at the position of the central chip groove 23.

[0047] In some embodiments, one side of the side groove 22 facing the secondary flank 7 includes a first side cutting deflection surface 221, and the middle chip removal groove 23 includes a second side cutting deflection surface 231. The second side cutting deflection surface 231 and the first side cutting deflection surface 221 face each other along the inner and outer directions of the middle chip removal groove 23.

[0048] That is to say, when the secondary flank 7 performs transverse cutting, the first side cutting deflection surface 221 can extrude the cutting chips of the cutting. When the main cutting edge 6 performs longitudinal cutting, the second side cutting deflection surface 231 can extrude the cutting chips of the cutting. The inner side of the first side cutting deflection surface 221 is the second side cutting deflection surface 231, so as to form the extrusion of the cutting chips for different cutting methods in their respective directions.

[0049] Furthermore, the first side cutting deflection surface 221 is configured as an arc surface, which can effectively perform chip curling, chip breaking, etc. At the same time, the arc-shaped first side cutting deflection surface 221 can enhance the uniform stress on the rake face 2 of the cutting blade 100 and prevent stress concentration; moreover, the first side cutting deflection surface 221 is set as an arc, which can guide and limit the cutting chips of the cutting, making the cutting chips into curled chips, and the curled chips generated during cutting can control the cutting chips to be discharged in an orderly manner in a direction that does not interfere with the operator's operation safety, thereby avoiding the flying of cutting chips.

[0050] In some embodiments, a cutting groove inclined surface 222 is connected to the lower side of the first side cutting deflection surface 221, and the cutting groove inclined surface 222 is adjacent to and connected to the land surface layer 21.

[0051] Specifically, the cutting groove inclined surface 222 can be configured such that the side close to the land surface layer 21 is higher than the side close to the first side cutting deflection surface 221. Then, the cutting chips generated by cutting can enter the side groove 22 more smoothly, and the cutting chips in the side groove 22 can form curled chips under the extrusion of the first side cutting deflection surface 221. Moreover, the cutting groove inclined surface 222 is adjacent to and connected to the land surface layer 21, and one end of the land surface layer 21 close to the secondary flank 7 is higher than one end close to the cutting groove inclined surface 222. As Figure 7 shown, after the land surface layer 21 is inclined, the included angle with the horizontal plane is α, that is, the land surface layer 21 is inclined in the direction from close to the secondary flank 7 to close to the cutting groove inclined surface 222, thereby enhancing the sharpness and strength of the secondary flank 7, and at the same time enabling the cutting chips to be better guided along the land surface layer 21 to the cutting groove inclined surface 222, and contacting and pressing with the cutting groove inclined surface 222 and the first side cutting deflection surface 221, which is beneficial to forming orderly cutting chips.

[0052] Moreover, both the first side cutting deflection surface 221 and the cutting groove inclined surface 222 extend from one end close to the main cutting edge 6 towards the other end away from the main cutting edge 6. Correspondingly, the side groove 22 extends from one end close to the main cutting edge 6 to the other end away from the main cutting edge 6, increasing the volume of the side groove 22. When the auxiliary flank 7 cuts the workpiece, the cutting chips can move from a position close to the main cutting edge 6 towards a position away from the main cutting edge 6 and are discharged from the end away from the main cutting edge 6, making the extrusion and discharge path of the cutting chips more orderly.

[0053] In some embodiments, a two-sided convex structure 24 is formed between the middle chip discharge groove 23 and the side grooves 22 on both sides. The surface of each convex structure 24 facing the main cutting edge 6 includes a front cutting deflection surface 232.

[0054] Among them, the two-sided convex structures 24 can separate the middle chip discharge groove 23 and the side grooves 22, and a first side cutting deflection surface 221 can be provided on the side of the convex structure 24 facing the auxiliary flank 7, and a second side cutting deflection surface 231 is provided inside the convex structure 24. That is to say, it is convenient to set the surface of the convex structure 24 to press against the cutting chips, so as to limit and press the cutting chips.

[0055] Referring to Figure 8 As shown, the front side of each convex structure 24, that is, the side facing the main cutting edge 6, is provided with a front cutting deflection surface 232. The cutting chips can be pressed and limited by the front cutting deflection surface 232 corresponding to each convex structure 24. Each convex structure 24 is provided with a second side cutting deflection surface 231. Then, the two opposite second side cutting deflection surfaces 231 between the two-sided convex structures 24 can press and limit the side of the cutting chips to prevent the cutting chips from being discharged disorderly.

[0056] Furthermore, a distance is left between the front cutting deflection surface 232 and the main cutting edge 6, so that when the main cutting edge 6 cuts the workpiece, a certain buffer and accommodation space can be left for the cutting chips generated by cutting.

[0057] In some embodiments, the front cutting deflection surface 232 is configured as a concave arch shape recessed away from the main cutting edge 6.

[0058] That is to say, when the main cutting edge 6 performs cutting, the cutting chips generated by cutting are pressed against the front cutting deflection surface 232. And the front cutting deflection surface 232 is configured as an arch, so that the cutting chips can be formed into a wavy shape under the extrusion of the arch-shaped front cutting deflection surface 232. That is to say, when the cutting blade 100 is used for longitudinal cutting, the cutting chips formed by cutting are spiral cutting chips with a wavy cross-section; and the front cutting deflection surface 232 is recessed in a direction away from the main cutting edge 6, which is equivalent to leaving more space between the front cutting deflection surface 232 and the main cutting edge 6, which is beneficial to the formation of wavy cutting chips.

[0059] In some embodiments, the middle chip evacuation groove 23 further includes an anti-chip platform 235. The anti-chip platform 235 is configured as an inclined surface, and the end of the inclined surface close to the main cutting edge 6 is lower than the end away from the main cutting edge 6.

[0060] In practice, the anti-chip platform 235 is located at the rear of the middle chip evacuation groove 23, and the two second side cutting deflection surfaces 231 are located on both sides of the anti-chip platform 235. When the cutting blade 100 performs longitudinal cutting, the main cutting edge 6 cuts the workpiece to be machined, and the formed cutting chips are shaped by the front cutting deflection surface 232, so as to obtain a substantially wavy cross-section and prevent the cutting chips from being formed disorderly; at the same time, the formed cutting chips are located on the two opposite second side cutting deflection surfaces 231. A chip evacuation inclined surface 234 is provided between the two second side cutting deflection surfaces 231. The front side of the anti-chip platform 235 and the area between the chip evacuation inclined surface 234 and the two second side cutting deflection surfaces 231 form a chip evacuation channel 237. The cutting chips enter the chip evacuation channel 237, and the two second side cutting deflection surfaces 231 limit the cutting chips to make the cutting chips narrower, and during the extrusion process, the cutting chips are hardened. When the cutting chips are extruded and contact with the anti-chip platform 235, the inclined surface design of the anti-chip platform 235 extrudes the cutting chips in the reverse direction of chip evacuation, forcing the cutting chips to break by themselves. Thus, the anti-chip platform 235 and the two second side cutting deflection surfaces 231 jointly extrude the cutting chips, and the anti-chip platform 235 with an inclined surface can give a reaction force to the extrusion of the cutting chips, so that the cutting chips are hardened and broken.

[0061] In some embodiments, the middle chip evacuation groove 23 further includes a third side cutting deflection surface 233. The third side cutting deflection surface 233 is adjacent to the second side cutting deflection surface 231 and is also adjacent to the anti-chip platform 235.

[0062] In practice, the third-side cutting deflection surface 233 is adjacent to the chip-back platform 235, and the third-side cutting deflection surface 233 is located between the chip-back platform 235 and the second-side cutting deflection surface 231. The third-side cutting deflection surface 233 and the chip-back platform 235 as a whole are higher than the height of the second-side cutting deflection surface 231. Each convex structure 24 corresponds to a third-side cutting deflection surface 233. The two third-side cutting deflection surfaces 233 are symmetric, and the low points of the two third-side cutting deflection surfaces 233 intersect and converge with the low point of the chip-back platform 235. For example, the inclined surfaces of the chip-back platform 235 and the two third-side cutting deflection surfaces 233 are all triangular cross-sections, and the three triangles share a low point, that is, the inclined surface of the chip-back platform 235 and the two third-side cutting deflection surfaces 233 can form a sub-groove, and another sub-groove is formed between the two second-side cutting deflection surfaces 231 and the chip evacuation inclined surface 234. The two sub-grooves serve as the chip evacuation channels 237. When the main cutting edge 6 cuts the workpiece to be machined, the cutting chips are squeezed into the sub-groove between the two second-side cutting deflection surfaces 231, and then are squeezed into the sub-groove formed by the two third-side cutting deflection surfaces 233 and the chip-back platform 235, and are squeezed and hardened and broken by the chip-back platform 235, etc.

[0063] Meanwhile, the cutting chips enter the chip evacuation channels 237 to be close to the chip-back platform 235, and are squeezed by the chip-back platform 235 and then discharged forward or to both sides, where the front side is the direction of the main cutting edge 6, and the two sides are the two sides of the main cutting edge 6. Moreover, the transition between the third-side cutting deflection surface 233 and the chip-back platform 235 is an arc transition, which is convenient for cleaning when cleaning the cutting blade 100.

[0064] In addition, the positions on both sides of the inclined surface of the chip-back platform 235 are the chip-back platform side surfaces 236. When the cutting tool performs transverse cutting, the auxiliary flank edge 7 cuts the workpiece to be machined, and the chip-breaking groove composed of the flank surface layer 21, the chip-back platform side surface 236, the cutting groove inclined surface 222 and the first-side cutting deflection surface 221 can effectively perform chip curling, chip breaking and chip evacuation.

[0065] Among them, the intersection points formed after the merger and intersection of the first-side cutting deflection surface 221, the front cutting deflection surface 232, the second-side cutting deflection surface 231 and the third-side cutting deflection surface 233 are the highest points of the rake face 2. While setting the cutting blade 100 as a groove structure to facilitate accommodating the cutting chips, the first-side cutting deflection surface 221, the front cutting deflection surface 232, the second-side cutting deflection surface 231 and the third-side cutting deflection surface 233 can also be set to facilitate controlling the shape of the cutting chips and the evacuation of the cutting chips.

[0066] It should be noted that the cutting groove inclined surface 222 gradually narrows in the direction away from the main cutting edge 6, causing more cutting chips to concentrate at the front end of the side groove 22. And a small amount of the cutting chips are extruded and discharged along the first side cutting deflection surface 221 and the chip breaker side surface 236 at the front end, changing the cutting chip flow direction and also enabling the cutting chips to break.

[0067] An embodiment of the present utility model discloses a cutting tool 300, which includes a tool shank 200, a pressing connection member 8, and the above-mentioned cutting blade 100. The tool shank 200 is provided with an open mounting groove 203. On one side of the mounting groove 203 of the tool shank 200 is the first pressing portion 201 for the cutting blade 100, and on the other side of the mounting groove 203 of the tool shank 200 is the second pressing portion 202, and the first pressing portion 201 and the second pressing portion 202 are opposite to each other. The cutting blade 100 is adapted to be mounted in the mounting groove 203, and the pressing connection member 8 is connected to the tool shank 200 and presses the first pressing portion 201 and the first pressing portion 201, thereby pressing the cutting blade 100.

[0068] In practice, the tool shank 200 is provided with a mounting groove 203, and the front side and both sides of the mounting groove 203 are open. The cutting blade 100 is placed in the mounting groove 203. An upper V-shaped groove 204 is formed in the area of the top surface 1 of the cutting blade 100 outside the rake face 2. At the same time, a bottom V-shaped groove 205 is formed on the bottom surface 5 of the cutting blade 100. Correspondingly, the first pressing portion 201 of the tool shank 200 is configured with an upper V-shaped protrusion, and a lower V-shaped protrusion is provided on the side of the second pressing portion 202 of the tool shank 200 facing the first pressing portion 201. When the cutting blade 100 is placed in the mounting groove 203, and the rake face 2, the main cutting edge 6, and the secondary flank edge 7 of the cutting blade 100 are exposed, the upper V-shaped groove 204 of the cutting blade 100 cooperates with the upper V-shaped protrusion of the first pressing portion 201, and at the same time, the lower V-shaped groove of the cutting blade 100 cooperates with the lower V-shaped protrusion of the second pressing portion 202, thereby preventing the cutting blade 100 from moving in the width direction of the tool shank 200 after being mounted in the mounting groove 203 and improving the mounting stability of the cutting blade 100.

[0069] Certainly, an upper V-shaped groove 204 can also be provided in the first pressing portion 201 of the tool shank 200, and an upper V-shaped protrusion is provided in the area of the top surface 1 of the cutting blade 100 outside the rake face 2. Similarly, a bottom V-shaped groove 205 is provided in the second pressing portion 202 of the tool shank 200, and a lower V-shaped protrusion is provided on the bottom surface 5 of the cutting blade 100. It can also make the cutting blade 100 and the tool shank 200 cooperate and be mounted to prevent the cutting blade 100 from moving in the width direction of the tool shank 200 after being mounted in the mounting groove 203, and can also improve the mounting stability of the cutting blade 100.

[0070] In addition, it should be noted that a guiding clearance groove 101 is provided at the front part of the bottom surface 5 of the cutting blade 100. The guiding clearance groove 101 not only has a guiding function, but also has a higher cross-section than the bottom V-shaped groove 205 of the bottom surface 5 of the cutting blade 100. Therefore, after the cutting blade 100 is installed in the installation groove 203, the guiding clearance groove 101 does not contact the front end of the second pressing part 202 of the tool bar 200. When there are burrs at the front end of the second pressing part 202 of the tool bar 200, the guiding clearance groove 101 plays a role in avoiding interference, and at the same time, it does not affect the fitting of the rear part of the bottom surface 5 of the cutting blade 100 and the lower V-shaped protrusion of the second pressing part 202.

[0071] Furthermore, the pressing connecting member 8 can be a pressing bolt. A pressing boss is arranged in the first pressing part 201 of the tool bar 200, and the pressing bolt has a pressing step. The pressing bolt is vertically inserted through the first pressing part 201 and the second pressing part 202 of the tool bar 200, and the pressing step of the pressing bolt presses against the pressing boss in the first pressing part 201, so that the first pressing part 201 and the second pressing part 202 of the tool bar 200 press the cutting blade 100, so as to connect and press the cutting blade 100 and the tool bar 200. By changing the length, shape and performance of the tool bar 200, etc., the cutting tool 300 can be adapted to different processing requirements.

[0072] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cutting blade, characterized in that, Comprising: A top surface and a bottom surface, with a front cutting face provided at the end of the top surface. The bottom of the front cutting face exposed outside the edge region of the bottom surface includes a flank and a secondary flank. The flank is located at the end away from the center of the cutting blade, and a main cutting edge is formed between the flank and the front cutting face. A secondary flank cutting edge is formed between the secondary flank and the front cutting face; A tool tip, which is formed at the transition between the main cutting edge and the secondary flank cutting edge; A land surface layer, at least part of which is provided at the tool tip, and the land surface layer extends from the tool tip in a direction away from the main cutting edge.

2. The cutting insert according to claim 1, characterized in that, The outer periphery of the tool tip is an arc-shaped structure, and the position where the land surface layer connects to the tool tip is an arc-shaped structure.

3. The cutting insert according to claim 1, wherein, The front cutting face includes a groove structure, which includes a central chip groove and side grooves located on both sides of the central chip groove. The central chip groove opens towards the main cutting edge, and the side grooves open towards the secondary flank cutting edge. When the cutting blade is suitable for longitudinal cutting, the main cutting edge is used for machining the workpiece, and the central chip groove is used to accommodate the cutting chips and squeeze the cutting chips until they break. When the cutting blade is suitable for transverse cutting, the secondary flank cutting edge is used for cutting the workpiece, and the side grooves are used to accommodate the cutting chips and squeeze the cutting chips until they break.

4. The cutting insert according to claim 3, characterized in that, One side of the side groove facing the secondary flank cutting edge includes a first side cutting deflection surface, and the central chip groove includes a second side cutting deflection surface. The second side cutting deflection surface and the first side cutting deflection surface are opposite to each other in the inner and outer directions of the central chip groove.

5. The cutting insert according to claim 4, characterized in that, A cutting groove inclined surface is connected to the lower side of the first side cutting deflection surface, and the cutting groove inclined surface is adjacent to and connected to the land surface layer.

6. The cutting insert according to claim 3, characterized in that, Two side convex structures are formed between the central chip groove and the side grooves on both sides. One side of each convex structure facing the main cutting edge includes a front cutting deflection surface.

7. The cutting insert according to claim 6, characterized in that, The front cutting deflection surface is configured as a concave arched shape that is recessed away from the main cutting edge.

8. The cutting insert according to claim 4, wherein, The central chip groove further includes a chip breaker platform, which is configured as an inclined surface, and one end of the inclined surface close to the main cutting edge is lower than the end away from the main cutting edge.

9. The cutting insert according to claim 8, characterized in that, The central chip groove further includes a third side cutting deflection surface, which is adjacent to the second side cutting deflection surface and adjacent to the chip breaker platform.

10. A cutting tool, characterized in that, Comprising a tool shank, a pressing connecting piece, and the cutting blade according to any one of claims 1-9. The tool shank is provided with an open mounting groove. One side of the tool shank in the mounting groove is a first pressing portion for the cutting blade, and the other side of the tool shank in the mounting groove is a second pressing portion. The first pressing portion and the second pressing portion are opposite to each other. The cutting blade is suitable for being mounted in the mounting groove, and the pressing connecting piece is connected to the tool shank and presses the first pressing portion and the first pressing portion, thereby pressing the cutting blade.

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