Cutting blade

Abstract

The utility model provides a cutting blade which comprises an upper surface, a lower surface and a peripheral side surface, wherein the upper surface and the lower surface are oppositely arranged; the peripheral side surface extends between the upper surface and the lower surface; the peripheral side surface comprises a first longitudinal side surface and a second longitudinal side surface which are oppositely arranged, and a first transverse side surface respectively connected with the first longitudinal side surface and the second longitudinal side surface; the first transverse side surface intersects with the upper surface to form a cutting edge which comprises an arc-shaped first cutting edge; in plan view from the upper surface, the first cutting edge protrudes outward, and the outermost point thereof is closer to the first longitudinal side surface than the second longitudinal side surface. The utility model aims to solve the problem that the blade is easy to break in a three-edge machining scene.

Description

Technical Field

[0001] This utility model belongs to the field of machining tool technology, and in particular relates to a cutting insert. Background Technology

[0002] In existing applications of cutting inserts for three-sided machining, the mainstream approach is to install two rows of inserts staggered on the cutter head, utilizing the two straight cutting edges of the inserts for cutting. However, this design has the following technical drawbacks: First, the small arc connection at the junction of the two cutting edges makes them prone to chipping when the sharp parts come into contact with the workpiece; second, the lack of an inclination angle at the ends of the arc increases cutting resistance during cutting, further exacerbating the risk of chipping. These defects severely affect the lifespan of the inserts and restrict the improvement of machining efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to solve the problem of blade chipping in three-sided cutting scenarios.

[0004] This application provides a cutting insert, comprising:

[0005] The upper and lower surfaces are arranged opposite to each other, and a peripheral side extends between the upper and lower surfaces; the peripheral side includes a first longitudinal side and a second longitudinal side arranged opposite to each other, and a first transverse side connecting the first longitudinal side and the second longitudinal side respectively; the first transverse side intersects with the upper surface to form a cutting edge, including an arc-shaped first cutting edge; viewed from the upper surface, the arc-shaped first cutting edge protrudes outward, and its outermost point is closer to the first longitudinal side than the second longitudinal side.

[0006] Furthermore, the cutting edge sequentially includes a second cutting edge that is connected to the first longitudinal side and is straight, a first cutting edge, and a third cutting edge that is connected to the second longitudinal side and is straight; viewed from the first transverse side, the cutting edge is lower than the upper surface, the first cutting edge is parallel to the upper surface, and when the third cutting edge extends toward the second longitudinal side, it first tilts downward and then tilts upward.

[0007] Furthermore, when viewed from the normal direction of the first longitudinal side, the cutting edge is lower than the upper surface, the first cutting edge is parallel to the upper surface, and when the second cutting edge extends towards the middle of the first longitudinal side, it first tilts downward and then tilts upward.

[0008] Furthermore, a rake face is provided on the upper surface near the cutting edge; the rake face includes a first rake face connected to the first cutting edge, a second rake face connected to the second cutting edge, and a third rake face connected to the third cutting edge; the width of the first rake face is greater than the width of the second rake face and the width of the third rake face, respectively.

[0009] Furthermore, the angle α formed by the second and third cutting edges is an acute angle; the angle β formed by the third cutting edge and the second longitudinal side surface is an obtuse angle.

[0010] Specifically, the first longitudinal side and the second longitudinal side are parallel to each other and perpendicular to the upper surface and the lower surface, respectively, and the length of the first longitudinal side is greater than the length of the second longitudinal side.

[0011] Furthermore, the first transverse side includes a first transverse plane and a first transverse curved surface connected at one end, and the other ends of the first transverse plane and the first transverse curved surface are respectively connected to the second longitudinal side and the first longitudinal side; one end of the imaginary extension surface of the first transverse plane intersects the transverse central axis, and the other end intersects the imaginary extension surface of the first longitudinal side.

[0012] Furthermore, the circumferential side also includes a second transverse side, which is rotationally symmetrical with respect to the transverse central axis as to the first transverse side.

[0013] Specifically, the imaginary extension surfaces at both ends of the second transverse side intersect with the imaginary extension surfaces of the first transverse side.

[0014] The improvements of this application bring the following advantages: The main cutting edge (first cutting edge) of the cutting insert in the embodiment of this application is designed with a large arc, which helps to reduce cutting resistance, avoid the tip being too sharp and causing chipping when it touches the workpiece, and protect the cutting edge. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a cutting blade according to an embodiment of this application;

[0016] Figure 2 This is a three-dimensional structural schematic diagram of another cutting blade according to an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the structure of a cutting blade as viewed from the top surface according to an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the structure of a cutting blade as viewed from the normal direction of the first longitudinal side surface, according to an embodiment of this application.

[0019] Figure 5 This is a partial schematic diagram of the structure of a cutting blade as viewed from the first transverse side view according to an embodiment of this application;

[0020] Figure 6 This is a partial three-dimensional structural diagram of a cutting blade according to an embodiment of this application;

[0021] Figure 7 This is a partial structural schematic diagram of a cutting blade viewed from the normal direction along the first longitudinal side surface, according to an embodiment of this application.

[0022] Wherein, 1.1: upper surface; 1.2: lower surface; 3.1: first longitudinal side surface; 3.2: second longitudinal side surface; 3.3: first transverse curved surface; 3.4: first transverse plane; 4.1: first rake face; 4.2: second rake face; 4.3: third rake face; 5.1: first cutting edge; 5.2: second cutting edge; 5.3: third cutting edge. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0024] Please see Figure 1-7 According to an embodiment of this application, a cutting blade includes an arc-shaped first cutting edge 5.1. When viewed from the top surface 1.1, the arc-shaped first cutting edge 5.1 protrudes outward, and its outermost point is closer to the first longitudinal side surface 3.1 than the second longitudinal side surface 3.2.

[0025] As one embodiment, it includes an upper surface 1.1 and a lower surface 1.2 disposed opposite to each other, and a peripheral side surface extending between the upper surface 1.1 and the lower surface 1.2; the peripheral side surface includes a first longitudinal side surface 3.1 and a second longitudinal side surface 3.2 disposed opposite to each other, and a first transverse side surface connecting the first longitudinal side surface 3.1 and the second longitudinal side surface 3.2 respectively; the first transverse side surface intersects with the upper surface 1.1 to form a cutting edge, including an arc-shaped first cutting edge 5.1; viewed from the upper surface 1.1, the arc-shaped first cutting edge 5.1 protrudes outward, and its outermost point is closer to the first longitudinal side surface 3.1 than the second longitudinal side surface 3.2.

[0026] As one embodiment, the cutting edge sequentially includes a second cutting edge 5.2 connected to the first longitudinal side 3.1 and in a straight line, a first cutting edge 5.1, and a third cutting edge 5.3 connected to the second longitudinal side 3.2 and in a straight line; viewed from the side along the first transverse side, the cutting edge is lower than the upper surface 1.1, the first cutting edge 5.1 is parallel to the upper surface 1.1, and when the third cutting edge 5.3 extends toward the second longitudinal side 3.2, it first tilts downward and then tilts upward.

[0027] Viewed from the normal direction of the first longitudinal side 3.1, the cutting edge is lower than the upper surface 1.1, the first cutting edge 5.1 is parallel to the upper surface 1.1, and the second cutting edge 5.2 extends towards the middle of the first longitudinal side 3.1, first tilting downwards and then tilting upwards.

[0028] The circular arc cutting edge has straight cutting edges on both sides, which are inclined downwards. This helps guide the chips, allowing the cuttings to flow out better and preventing chip accumulation on the main cutting edge. It also creates a clearance space that does not interfere with the cutting of the main cutting edge. The downward-inclined straight cutting edges reduce cutting resistance and reduce the risk of chipping during use.

[0029] As an example, a rake face is provided on the upper surface 1.1 near the cutting edge; the rake face includes a first rake face 4.1 connected to the first cutting edge 5.1, a second rake face 4.2 connected to the second cutting edge 5.2, and a third rake face 4.3 connected to the third cutting edge 5.3; the width of the first rake face 4.1 is greater than the width of the second rake face 4.2 and the width of the third rake face 4.3, respectively.

[0030] As an example, the included angle α formed by the second cutting edge 5.2 and the third cutting edge 5.3 is an acute angle; the included angle β formed by the third cutting edge 5.3 and the second longitudinal side surface 3.2 is an obtuse angle.

[0031] As one embodiment, the first longitudinal side 3.1 and the second longitudinal side 3.2 are parallel to each other and perpendicular to the upper surface 1.1 and the lower surface 1.2, respectively. The length of the first longitudinal side 3.1 is greater than the length of the second longitudinal side 3.2.

[0032] As one embodiment, the first transverse side includes a first transverse plane 3.4 and a first transverse curved surface 3.3 connected at one end, and the other ends of the first transverse plane 3.4 and the first transverse curved surface 3.3 are respectively connected to the second longitudinal side 3.2 and the first longitudinal side 3.1; one end of the imaginary extension surface of the first transverse plane 3.4 intersects the transverse central axis, and the other end intersects the imaginary extension surface of the first longitudinal side 3.1.

[0033] As one embodiment, the peripheral side also includes a second transverse side, which is rotationally symmetrical with respect to the transverse central axis as the first transverse side.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cutting blade, characterized in that, It includes an upper surface and a lower surface arranged opposite to each other, and a peripheral side surface extending between the upper surface and the lower surface; the peripheral side surface includes a first longitudinal side surface and a second longitudinal side surface arranged opposite to each other, and a first transverse side surface connecting the first longitudinal side surface and the second longitudinal side surface respectively; the first transverse side surface intersects with the upper surface to form a cutting edge, including an arc-shaped first cutting edge; viewed from the upper surface, the first cutting edge protrudes outward, and its outermost point is closer to the first longitudinal side surface than the second longitudinal side surface.

2. A cutting blade according to claim 1, characterized in that, The cutting edge sequentially includes a second cutting edge that is connected to the first longitudinal side and is straight, a first cutting edge, and a third cutting edge that is connected to the second longitudinal side and is straight; viewed from the first transverse side, the cutting edge is lower than the upper surface, the first cutting edge is parallel to the upper surface, and when the third cutting edge extends toward the second longitudinal side, it first tilts downward and then tilts upward.

3. A cutting blade according to claim 2, characterized in that, Viewed from the normal direction of the first longitudinal side, the cutting edge is lower than the upper surface, the first cutting edge is parallel to the upper surface, and when the second cutting edge extends toward the middle of the first longitudinal side, it first tilts downward and then tilts upward.

4. A cutting blade according to claim 2, characterized in that, A rake face is provided on the upper surface near the cutting edge; the rake face includes a first rake face connected to the first cutting edge, a second rake face connected to the second cutting edge, and a third rake face connected to the third cutting edge; the width of the first rake face is greater than the width of the second rake face and the width of the third rake face.

5. A cutting blade according to claim 2, characterized in that, The angle α formed by the second cutting edge and the third cutting edge is an acute angle; the angle β formed by the third cutting edge and the second longitudinal side surface is an obtuse angle.

6. A cutting insert according to any one of claims 1-5, characterized in that, The first longitudinal side and the second longitudinal side are parallel to each other and perpendicular to the upper surface and the lower surface, respectively, and the length of the first longitudinal side is greater than the length of the second longitudinal side.

7. A cutting insert according to any one of claims 1-5, characterized in that, The first transverse side includes a first transverse plane and a first transverse curved surface connected at one end, and the other ends of the first transverse plane and the first transverse curved surface are respectively connected to the second longitudinal side and the first longitudinal side; one end of the imaginary extension surface of the first transverse plane intersects the transverse central axis, and the other end intersects the imaginary extension surface of the first longitudinal side.

8. A cutting insert according to any one of claims 1-5, characterized in that, The circumferential side also includes a second transverse side, which is rotationally symmetrical with respect to the transverse central axis as to the first transverse side.

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