Double-sided cutting insert

Abstract

The invention discloses a double-sided cutting blade, and relates to the field of cutting blades, the double-sided cutting blade comprises a blade main body which is vertically symmetrical, the blade main body is composed of a blade core body and three groups of blade edge bodies, the three groups of blade edge bodies are respectively arranged on the outer edge of the blade core body, and a blade tip is arranged on the left front side of each blade edge body. A main cutting face, an auxiliary cutting face, an arc-shaped slope face and a triangular slope face are sequentially arranged on the right side of the tool nose, a side cutting face, a chip breaking slope face and a guide face are sequentially arranged on the left side of the tool nose, and a plurality of first chip breaking teeth and chip breaking grooves which are evenly distributed are formed in the chip breaking slope face. And three groups of second chip breaking teeth of which the lengths are sequentially increased are arranged on the triangular slope surface. According to the double-sided cutting blade, the multiple cutting faces are formed through the tool nose, the main cutting face, the auxiliary cutting face and the side cutting faces, the effective cutting area of the blade during cutting machining is increased, the cutting task can be completed more quickly, the machining efficiency is improved, and large chippings can be effectively prevented through multi-section cutting machining.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting inserts, in particular to a double-sided cutting insert. Background Art

[0002] Cutting inserts are commonly used for cutting, milling and grooving operations in metal processing. In order to improve cutting efficiency, extend the service life of the inserts, and reduce the number of tool changes, cutting inserts are usually designed with double-sided multiple cutting edges.

[0003] The existing double-sided cutting blades are unable to effectively cut off and guide the generated chips during processing. Since multiple cutting edges perform continuous cutting, the generated chips will be entangled with each other, and the chips will be stuck between the blade and the workpiece, or entangled on the blade, causing more intense friction between the chips and the blade, and generating more heat on the blade surface, thereby aggravating the wear of the blade and affecting the service life of the blade. Summary of the invention

[0004] Technical problem to be solved: The generated debris cannot be effectively cut off and guided, resulting in more intense friction between the debris and the blade, aggravating the wear of the blade and affecting the service life of the blade.

[0005] In view of the deficiencies of the prior art, the present invention provides a double-sided cutting insert, thereby solving the technical problems mentioned in the background technology.

[0006] Technical solution:

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A double-sided cutting blade, comprising a blade body that is symmetrical up and down, and the blade body is a geometric structure whose orthographic projection is a regular hexagon, the blade body is composed of a blade core and three groups of blade edges, the blade core is located at the geometric center of the blade body, and the orthographic projection of the blade core is a regular triangle, the blade edge is a geometric structure whose orthographic projection is an isosceles trapezoid, and the three groups of blade edges are respectively arranged at the outer edges of the blade core, a mounting hole is arranged at the center of the blade core, and a positioning boss is arranged on the blade core and located outside the mounting hole;

[0009] A cutting edge is arranged on the left front side of the blade body, and a main cutting surface, a secondary cutting surface, an arcuate slope surface and a triangular slope surface are arranged in sequence on the right side of the cutting edge, and a side cutting surface, a chip breaking slope surface and a guide surface are arranged in sequence on the left side of the cutting edge. The main cutting surface, the side cutting surface, the arcuate slope surface and the chip breaking slope surface intersect at point P1, the main cutting surface, the secondary cutting surface, the arcuate slope surface and the triangular slope surface intersect at point P2, the right end of the secondary cutting surface intersects with the triangular slope surface at point P3, the side cutting surface, the chip breaking slope surface and the guide surface intersect at point P4, a number of evenly distributed first chip breaking teeth and chip breaking grooves are arranged on the chip breaking slope surface, and three groups of second chip breaking teeth with increasing lengths are arranged on the triangular slope surface.

[0010] In a possible implementation, a hexagonal groove is provided at the top of the blade core and on the outer side of the positioning boss, and a positioning groove connected to the hexagonal groove is provided on the positioning boss and close to the top corner of the blade core.

[0011] In a possible implementation, a conical slope connected to the hexagonal groove is provided at the top corner of the upper surface of the blade core, the diagonal of the conical slope is connected to the top corner of the blade core, and a truncation platform is provided on the blade core and between adjacent conical slopes.

[0012] In a possible implementation, the top plane of the positioning boss is the highest point of the blade core, and the thickness difference H1 between the positioning boss and the blade tip is 3-3.2 mm, the intersection line of the guide surface and the blade core is the highest point of the blade body, and the thickness difference H2 between the highest point of the blade body and the blade tip is 2.78-2.82 mm, and the thickness difference H3 between the highest point P3 of the secondary cutting surface and the blade tip is 2.4-2.5 mm.

[0013] In a possible implementation, an arc-shaped cutting edge is provided at the intersection of the arc-shaped slope surface and the main cutting surface, the thickness difference between the endpoint P1 on the left side of the arc-shaped cutting edge and the tip of the blade is 1.3-1.34 mm, the thickness difference between the endpoint P2 on the right side of the arc-shaped cutting edge and the tip of the blade is 1.45-1.5 mm, and the thickness difference between the intersection point P4 of the side cutting surface, the chip breaking slope surface and the guide surface and the tip of the blade is 2.1-2.14 mm.

[0014] In a possible implementation, the arc slope is located between two side lines on the right side of the arc cutting edge and are parallel to each other, and the two vertices at the right end of the arc slope have the same thickness, and the thickness difference with point P3 is 0.3-0.35 mm.

[0015] In a possible implementation, a plurality of the first chip breaking teeth are evenly arranged along the intersection line of the arc slope and the chip breaking slope, and adjacent first chip breaking teeth and the arc slope are cross-arranged with angles α1 and α, respectively, wherein the range of angle α1 is 44°-46°, and the range of angle α2 is 49°-51°.

[0016] In a possible implementation, a plurality of the chip breaker grooves are evenly arranged along the intersection line of the chip breaker slope and the guide surface, and the alignment line of the sharp end of the chip breaker groove is parallel to the arc slope, the angle β between the chip breaker groove and the alignment line is in the range of 59°-61°, the length of the chip breaker groove decreases from left to right, and the length range of the chip breaker groove is 2.5mm-3.5mm.

[0017] In a possible implementation, the second chip breaking teeth are evenly arranged along the intersection line of the secondary cutting surface and the triangular slope surface, and the rear end of the second chip breaking teeth extends to the arc slope surface, and the long diagonal line of the second chip breaking teeth is perpendicular to the edge line of the arc slope surface.

[0018] In a possible implementation, the blade body is made of cemented carbide composed of tungsten carbide and cobalt, and a diamond coating is provided on the surface of the blade body.

[0019] Beneficial effects:

[0020] In this solution, multiple cutting surfaces can be formed by the cooperation of the cutting tip, the main cutting surface, the secondary cutting surface and the side cutting surface, thereby increasing the effective cutting area of ​​the blade during cutting processing, completing the cutting task faster, improving processing efficiency, and multi-stage cutting processing can effectively prevent the occurrence of large chips.

[0021] In this solution, the arc slope, chip breaking slope, triangular slope and guide surface cooperate with each other to guide and disperse the chips produced by processing, thereby improving the chip discharge efficiency, and cutting and crushing the chips at multiple positions through the first chip breaking teeth, chip breaking grooves and second chip breaking teeth to avoid the chips from getting stuck between the blade and the workpiece, or the chips from being entangled on the blade, thereby reducing interference during the cutting process and helping to reduce blade wear.

[0022] In this solution, by precisely controlling the thickness difference between P1, P2, P3 and P4 and the blade tip, the blade body forms multiple cutting surfaces in different directions and angles, which can adapt to different cutting requirements and enhance the cutting effect on debris to facilitate rapid discharge of debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 A top view of the present invention;

[0026] Figure 3 It is a front view of the present invention;

[0027] Figure 4 It is the AA cross-sectional view of the present invention;

[0028] Figure 5 It is the BB cross-sectional view of the present invention;

[0029] Figure 6 It is a schematic diagram of the blade core structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the blade body structure of the blade of the present invention;

[0031] Figure 8 A top view of the blade body of the present invention;

[0032] Fig. 9 For the present invention Figure 8 Cross-sectional view at CC.

[0033] Legend: 1. Blade body; 2. Blade core; 21. Mounting hole; 22. Positioning boss; 23. Hexagonal groove; 24. Positioning groove; 25. Conical slope; 26. Cutting platform; 3. Blade body; 31. Blade tip; 32. Main cutting surface; 33. Side cutting surface; 34. Secondary cutting surface; 35. Arc slope; 351. Arc cutting edge; 36. Chip breaking slope; 37. Triangular slope; 38. Guide surface; 4. First chip breaking tooth; 5. Chip breaking groove; 6. Second chip breaking tooth. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, so the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not connected with the invention will be omitted from the drawings.

[0035] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0036] Embodiment 1:

[0037] This embodiment introduces the specific structure of the double-sided cutting blade. Figure 1-Figure 9 shown.

[0038] A double-sided cutting blade, comprising a blade body 1 which is symmetrical in the upper and lower parts, and the blade body 1 is a geometric structure whose orthographic projection is a regular hexagon, the blade body 1 is composed of a blade core 2 and three sets of blade edges 3, the blade core 2 is located at the geometric center of the blade body 1, and the orthographic projection of the blade core 2 is a regular triangle, the blade edges 3 are a geometric structure whose orthographic projection is an isosceles trapezoid, and the three sets of blade edges 3 are respectively arranged at the outer edges of the blade core 2, a mounting hole 21 is arranged at the center of the blade core 2, and a positioning boss 22 is arranged on the blade core 2 and located outside the mounting hole 21;

[0039] A cutting edge 31 is arranged on the left front side of the blade body 3, and a main cutting surface 32, a secondary cutting surface 34, an arc slope surface 35 and a triangular slope surface 37 are arranged in sequence on the right side of the cutting edge 31, and a side cutting surface 33, a chip breaking slope surface 36 and a guide surface 38 are arranged in sequence on the left side of the cutting edge 31, a plurality of evenly distributed first chip breaking teeth 4 and chip breaking grooves 5 are arranged on the chip breaking slope surface 36, and three groups of second chip breaking teeth 6 with increasing lengths are arranged on the triangular slope surface 37.

[0040] In the specific implementation process, multiple cutting surfaces can be formed by the cooperation of the cutting tip 31, the main cutting surface 32, the secondary cutting surface 34 and the side cutting surface 33, thereby increasing the effective cutting area of ​​the blade during cutting processing, completing the cutting task faster, and improving the processing efficiency. In addition, multi-stage cutting processing can effectively prevent the occurrence of large debris. The arc slope 35, the chip breaking slope 36, the triangular slope 37 and the guide surface 38 cooperate with each other to guide and disperse the debris produced by the processing, thereby improving the chip discharge efficiency. The first chip breaking tooth 4, the chip breaking groove 5 and the second chip breaking tooth 6 can cut and crush the debris at multiple positions to avoid the debris being stuck between the blade and the workpiece, or the debris being entangled on the blade, thereby reducing interference during the cutting process and helping to reduce blade wear.

[0041] A hexagonal groove 23 is provided at the top of the blade core 2 and on the outer side of the positioning boss 22, and a positioning groove 24 connected to the hexagonal groove 23 is provided on the positioning boss 22 and close to the top angle side of the blade core 2. The hexagonal groove 23 and the positioning groove 24 cooperate with each other to facilitate the positioning of the blade body 1 after the rotation, thereby ensuring the installation accuracy of the blade body 1.

[0042] A conical slope 25 connected to the hexagonal groove 23 is provided at the top corner of the upper surface of the blade core 2. The diagonal of the conical slope 25 is connected to the top corner of the blade core 2. A truncation platform 26 is provided on the blade core 2 and between adjacent conical slopes 25. The truncation platform 26 can further crush the debris at the end of the guide surface 38 and guide the debris through the conical slope 25 to improve the discharge efficiency of the debris.

[0043] The main cutting surface 32, the side cutting surface 33, the arc slope surface 35 and the chip breaking slope surface 36 intersect at point P1, the main cutting surface 32, the secondary cutting surface 34, the arc slope surface 35 and the triangular slope surface 37 intersect at point P2, the right end of the secondary cutting surface 34 intersects with the triangular slope surface 37 at point P3, the side cutting surface 33, the chip breaking slope surface 36 and the guide surface 38 intersect at point P4, and the heights of P1, P2, P3 and P4 gradually increase.

[0044] The top plane of the positioning boss 22 is the highest point of the blade core 2, and the thickness difference H1 between the positioning boss 22 and the blade tip 31 is 3-3.2 mm. In a specific implementation, the thickness difference between the positioning boss 22 and the blade tip 31 is 3.1 mm. In addition, the thickness difference between the vertex of the triangular slope 37 and the top plane of the positioning boss 22 is 0.2 mm.

[0045] The intersection line of the guide surface 38 and the blade core 2 is the highest point of the blade body 3, and the thickness difference H2 between the highest point of the blade body 3 and the blade tip 31 is 2.78-2.82mm. In a specific implementation, the thickness difference H2 is 2.8mm. The thickness difference H3 between the highest point P3 of the secondary cutting surface 34 and the blade tip 31 is 2.4-2.5mm. In a specific implementation, the thickness difference H3 is 2.45mm.

[0046] In addition, the main cutting surface 32 and the secondary cutting surface 34 are twisted planes with gradually increasing inclination angles, and the inclination angle range is 50°-53°, wherein the inclination angle of the leftmost end of the main cutting surface 32 is 50°, and the inclination angle of the rightmost end of the secondary cutting surface 34 is 53°.

[0047] An arc-shaped cutting edge 351 is provided at the intersection of the arc-shaped slope surface 35 and the main cutting surface 32. The thickness difference between the endpoint P1 on the left side of the arc-shaped cutting edge 351 and the cutting tip 31 is 1.3-1.34 mm, the thickness difference between the endpoint P2 on the right side of the arc-shaped cutting edge 351 and the cutting tip 31 is 1.45-1.5 mm, and the thickness difference between the intersection point P4 of the side cutting surface 33, the chip breaking slope surface 36 and the guide surface 38 and the cutting tip 31 is 2.1-2.14 mm. In a specific implementation, the thickness difference between the endpoint P1 and the cutting tip 31 is 1.32 mm, the thickness difference between the endpoint P2 and the cutting tip 31 is 1.47 mm, and the thickness difference between the intersection point P4 and the cutting tip 31 is 2.12 mm.

[0048] The two side lines of the arc slope 35 on the right side of the arc cutting edge 351 are parallel to each other, and the two vertices at the right end of the arc slope 35 have the same thickness, and the thickness difference with point P3 is 0.3-0.35mm. In a specific implementation, the thickness difference between the vertex at the right end of the arc slope 35 and point P3 is 0.33mm.

[0049] In the specific implementation process, by precisely controlling the thickness difference between P1, P2, P3 and P4 and the blade tip 31, the blade body 3 is at the lowest point of the blade tip 31, and the heights of P1, P2, P3 and P4 gradually increase, so that the main cutting surface 32, side cutting surface 33, auxiliary cutting surface 34, arc slope surface 35, chip breaking slope surface 36, triangular slope surface 37 and guide surface 38 form multiple cutting surfaces in different directions and angles, which can adapt to different cutting requirements and enhance the cutting effect of debris, so as to facilitate the rapid discharge of debris.

[0050] A plurality of first chip breaking teeth 4 are evenly arranged along the intersection line of the arc slope 35 and the chip breaking slope 36, and the adjacent first chip breaking teeth 4 and the arc slope 35 are cross-arranged with angles α1 and α, respectively, wherein the angle α1 ranges from 44° to 46°, and the angle α2 ranges from 49° to 51°. In a specific implementation, the angle α1 is 45°, the angle α2 is 50°, and there is a cross angle of 5° between adjacent first chip breaking teeth 4. By cross-arranging the first chip breaking teeth 4 with different angles, the cutting effect of different chips can be improved during the cutting process.

[0051] A plurality of chip breaker grooves 5 are evenly arranged along the intersection line of the chip breaking slope 36 and the guide surface 38, and the alignment line of the sharp end of the chip breaker groove 5 is parallel to the arc slope 35. The angle β between the chip breaker groove 5 and the alignment line is in the range of 59°-61°. In the specific implementation, the angle β is 60°. The length of the chip breaker groove 5 decreases from left to right, and the length range of the chip breaker groove 5 is 2.5mm-3.5mm, wherein the length of the leftmost chip breaker groove 5 is 3.5mm, and the length of the rightmost chip breaker groove 5 is 2.5mm. The chip breaker groove 5 can disperse and guide the cut chips to avoid local accumulation of chips and affect the cutting effect of the blade.

[0052] The second chip breaking teeth 6 are evenly arranged along the intersection line of the secondary cutting surface 34 and the triangular slope surface 37, and the rear end of the second chip breaking teeth 6 extends to the arc slope surface 35. The long diagonal line of the second chip breaking teeth 6 is perpendicular to the edge line of the arc slope surface 35. The second chip breaking teeth 6 can further cut the generated chips along the secondary cutting surface 34.

[0053] The blade body 1 is made of cemented carbide composed of tungsten carbide and cobalt, so that the blade body 1 has high hardness and wear resistance. At the same time, the blade body 1 can also be made of ceramic and cubic boron nitride materials, and the surface of the blade body 1 is provided with a diamond coating. The diamond coating has extremely high hardness and thermal conductivity, which can effectively reduce friction and quickly conduct heat, thereby reducing the temperature of the cutting area. In addition to the diamond coating, the surface of the blade body 1 can also be provided with an aluminum chromium nitride coating or a silicon nitride coating to reduce heat generation during cutting.

[0054] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. Double-sided cutting insert, characterized in that: include: A blade body (1) is symmetrical in the upper and lower parts, and the blade body (1) is a geometric structure whose orthographic projection is a regular hexagon. The blade body (1) is composed of a blade core (2) and three groups of blade edges (3). The blade core (2) is located at the geometric center of the blade body (1), and the orthographic projection of the blade core (2) is a regular triangle. The blade edges (3) are a geometric structure whose orthographic projection is an isosceles trapezoid, and the three groups of blade edges (3) are respectively arranged on the outer edge of the blade core (2). A mounting hole (21) is arranged at the center of the blade core (2), and a positioning boss (22) is arranged on the blade core (2) and located outside the mounting hole (21); The blade body (3) is provided with a cutting tip (31) on the left front side, the cutting tip (31) is provided with a main cutting surface (32), a secondary cutting surface (34), an arcuate slope surface (35) and a triangular slope surface (37) in sequence on the right side, and a side cutting surface (33), a chip breaking slope surface (36) and a guide surface (38) are provided in sequence on the left side of the cutting tip (31), the main cutting surface (32), the side cutting surface (33), the arcuate slope surface (35) and the chip breaking slope surface (36) intersect at a point P1, and the main cutting surface (32) ), the auxiliary cutting surface (34), the arc slope surface (35) and the triangular slope surface (37) intersect at point P2, the right end of the auxiliary cutting surface (34) intersects with the triangular slope surface (37) at point P3, the side cutting surface (33), the chip breaking slope surface (36) and the guide surface (38) intersect at point P4, the chip breaking slope surface (36) is provided with a plurality of evenly distributed first chip breaking teeth (4) and chip breaking grooves (5), and the triangular slope surface (37) is provided with three groups of second chip breaking teeth (6) with increasing lengths.

2. The double-sided cutting insert according to claim 1, characterized in that: A hexagonal groove (23) is provided at the top of the blade core (2) and outside the positioning boss (22), and a positioning groove (24) connected to the hexagonal groove (23) is provided on the positioning boss (22) and close to the top corner of the blade core (2).

3. The double-sided cutting insert according to claim 2, characterized in that: A conical slope (25) connected to the hexagonal groove (23) is provided at the top corner of the upper surface of the blade core (2); a diagonal line of the conical slope (25) is connected to the top corner of the blade core (2); and a truncation platform (26) is provided on the blade core (2) and between adjacent conical slopes (25).

4. The double-sided cutting insert according to claim 1, wherein: The top plane of the positioning boss (22) is the highest point of the blade core (2), and the thickness difference H1 between the positioning boss (22) and the blade tip (31) is 3-3.2 mm. The intersection line of the guide surface (38) and the blade core (2) is the highest point of the blade body (3), and the thickness difference H2 between the highest point of the blade body (3) and the blade tip (31) is 2.78-2.82 mm. The thickness difference H3 between the highest point P3 of the secondary cutting surface (34) and the blade tip (31) is 2.4-2.5 mm.

5. The double-sided cutting insert according to claim 1, wherein: An arc-shaped cutting edge (351) is arranged at the intersection of the arc-shaped slope surface (35) and the main cutting surface (32); the thickness difference between the end point P1 on the left side of the arc-shaped cutting edge (351) and the cutting tip (31) is 1.3-1.34 mm; the thickness difference between the end point P2 on the right side of the arc-shaped cutting edge (351) and the cutting tip (31) is 1.45-1.5 mm; and the thickness difference between the intersection point P4 of the side cutting surface (33), the chip breaking slope surface (36) and the guide surface (38) and the cutting tip (31) is 2.1-2.14 mm.

6. The double-sided cutting insert according to claim 5, characterized in that: The arc-shaped slope surface (35) is located between two side lines on the right side of the arc-shaped cutting edge (351) and are parallel to each other, and the two vertices at the right end of the arc-shaped slope surface (35) have the same thickness, and the thickness difference with point P3 is 0.3-0.35 mm.

7. The double-sided cutting insert according to claim 1, wherein: A plurality of the first chip breaking teeth (4) are evenly arranged along the intersection line of the arc slope surface (35) and the chip breaking slope surface (36), and adjacent first chip breaking teeth (4) and the arc slope surface (35) are cross-arranged with an angle α1 and an angle α, respectively, wherein the range of the angle α1 is 44°-46°, and the range of the angle α2 is 49°-51°.

8. The double-sided cutting insert according to claim 1, wherein: A plurality of the chip breaker grooves (5) are evenly arranged along the intersection line of the chip breaker slope surface (36) and the guide surface (38), and the alignment line of the sharp end of the chip breaker groove (5) is parallel to the arc slope surface (35), the angle β between the chip breaker groove (5) and the alignment line is in the range of 59°-61°, the length of the chip breaker groove (5) decreases from left to right, and the length range of the chip breaker groove (5) is 2.5mm-3.5mm.

9. The double-sided cutting insert according to claim 1, wherein: The second chip breaking teeth (6) are evenly arranged along the intersection line of the secondary cutting surface (34) and the triangular slope surface (37), and the rear end of the second chip breaking teeth (6) extends to the arc slope surface (35), and the long diagonal line of the second chip breaking teeth (6) is perpendicular to the edge line of the arc slope surface (35).

10. The double-sided cutting insert according to claim 1, wherein: The blade body (1) is made of a hard alloy composed of tungsten carbide and cobalt, and a diamond coating is provided on the surface of the blade body (1).

Images