Heavy-load machining cutting blade

Abstract

The heavy load machining cutting blade comprises a blade body and a cutting unit on the blade body, the cutting unit comprises a cutting edge, an arc-shaped edge, a front blade face, a chip breaking groove and an arc-shaped chip breaking table, the opening direction of the arc-shaped chip breaking table faces the arc-shaped edge, and the two ends of the chip breaking table are located on the front blade face of the cutting edge respectively. And the end part is transited to the front cutter surface through the arc surface. According to the cutting unit, the arc-shaped chip breaking table and the front cutter face form a large chip containing groove, the chip breaking and discharging capacity of the blade is improved, the service life of a cutter is prolonged to a certain degree, the surface quality of a machined workpiece is improved to a certain degree, and the problems that an existing heavy-load cutting blade is low in chip discharging and containing capacity, and the machined surface is prone to being damaged by cuttings are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cemented carbide blade technical field more specifically, it relates to a heavy load processing cutting blade. BACKGROUND

[0002] In the heavy load processing process, the big workpiece processing often adopts big cutting parameter, this can have very high requirement to the strength of cutting blade, chip breaking performance, the blade edge of poor strength is easy to produce collapse and break, and the blade of poor chip breaking will make chip accumulation, and further reduce the service life of the blade and the surface quality of the workpiece. Therefore, the edge and chip breaking structure of the blade need to be reasonably designed, so that the blade can effectively chip breaking and chip removal during cutting, reduce the cutting resistance and improve the tool life.

[0003] In CN114951725A a kind of indexable turning blade discloses a chip breaking groove type structure, specifically, the chip breaking groove of this patent starts from straight line cutting edge and circular arc cutting edge, including inverted bevel plane, first rake face, second rake face, first groove bottom surface and second groove bottom surface, also including strength unit located at second rake face, first chip control unit located at first groove bottom surface, second chip control unit located at second groove bottom surface, strength unit is protrusion, first chip control unit and second chip control unit are all arc protrusions;First chip control unit includes two, symmetrically distributed on the two sides of symmetry center line;Second chip control unit is evenly distributed along the direction of straight line cutting edge. The structure under low chip parameter, the first chip control unit set can effectively curl and break the chip, improve the safety of processing environment, avoid safety accidents. In the cutting process of large cutting depth and large feed, the first chip control unit, second chip control unit, second groove bottom surface wave surface and strength unit set by the blade act on the chip respectively, curl and break the chip, ensure the stability of the cutting process of large cutting depth and large feed. Although the patent improves the chip breaking ability of the blade for curling and breaking the chip, the groove structure of the patent has large resistance in the cutting process, low chip removal and chip capacity, and the cutting chip can easily damage the processing surface. At the same time, the heat dissipation effect is poor, so that the tool life is low. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems for the cutting resistance of the cutting structure of the traditional heavy load cutting blade, low chip removal and chip capacity, and insufficient heat dissipation performance, and provides a heavy load processing cutting blade.

[0005] The utility model realizes the purpose by the following technical schemes.

[0006] The application discloses a heavy-duty machining cutting blade, which comprises a blade body, a cutting unit arranged at a top corner of the blade body, and a positioning hole arranged at a geometric center of the blade body.

[0007] The cutting unit comprises an arc edge, a cutting edge, a rake face, an arc-shaped chip breaker and a center chip breaker, the rake face, the arc-shaped chip breaker and a cutting surface therebetween form a chip breaker groove, and the cutting unit comprises the arc edge, the rake face, the chip breaker groove, the arc-shaped chip breaker and the center chip breaker in the direction from the arc edge to the positioning hole; the arc-shaped chip breaker is in an arc-shaped protrusion form, the opening direction of the arc-shaped protrusion is towards the arc edge, and two ends of the arc-shaped chip breaker are respectively located on the rake face of the cutting edge, and the two ends are connected to the rake face through arc surfaces.

[0008] Further, the width L1 of the arc edge and the cutting edge is 0.05-0.2 mm, and the width L1 is preferably 0.1 mm.

[0009] Further, an inclined cutting section is arranged on the cutting edge, the inclined cutting section is inclined from the arc edge to the midpoint of the cutting edge, the interval length L of the inclined cutting section is 3-6 mm, and the height difference of the inclined cutting section is 0.3-0.5 mm.

[0010] Further, the rake face comprises a first rake face and a second rake face, the second rake face comprises an arc edge rake face and a cutting edge rake face, the angle α between the first rake face and the upper surface / lower surface is 3-10°, and the angle β between the second rake face and the upper surface / lower surface is 15-30°.

[0011] Further, the distance between each end of the arc-shaped chip breaker and the corresponding cutting edge is 0.6-0.8 mm.

[0012] Further, a cutting edge chip breaker surface is arranged between the cutting edge rake face and the center chip breaker, and the cutting edge chip breaker surface is provided with a plurality of chip breaker protrusions.

[0013] Further, the chip breaker protrusion is a strip-shaped protrusion, one end of the chip breaker protrusion is towards the cutting edge and forms an inclined angle with the upper surface, and the other end of the chip breaker protrusion is towards the center hole and is connected through a circular arc surface.

[0014] Further, the included angle γ between one end of the chip breaker protrusion and the upper positioning surface is 0-10°, and the included angle γ is preferably 1-2°; and the radius R of the circular arc surface of the other end of the chip breaker protrusion is 1-5 mm.

[0015] Further, the vertical distance H between the center chip breaker and the arc edge is 0.1-0.6 mm.

[0016] Further, the blade body is a rhombic body, and the cutting unit arranged on the blade body is not less than one.

[0017] Compared with the prior art, the beneficial effects are:

[0018] The arc-shaped chip breaking table and the rake face form a large chip groove, so that the chip breaking and chip removal capacity of the blade is improved, and the service life of the tool and the surface quality of the machined workpiece are improved to a certain extent.

[0019] In addition, the blade has a blade inclination angle at the cutting edge, so that the cutting resistance generated during machining is reduced, and the circular arc blade and the cutting edge are designed with double rake angles, so that the impact resistance of the blade is improved, and the blade can adapt to heavy load machining with large cutting parameters. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of a three-dimensional structure of the blade;

[0021] Figure 2 is a partial enlarged view of the cutting unit;

[0022] Figure 3 is a front view of a heavy load machining cutting blade;

[0023] Figure 4 is Figure 3 is a sectional view of the blade along the line A-A;

[0024] Figure 5 is Figure 3 is a sectional view of the blade along the line C-C;

[0025] Wherein, 1 is an upper surface, 2 is a lower surface, 3 is a side surface, 4 is a circular arc surface, 5 is a cutting edge, 6 is a circular arc blade, 7 is a cutting edge rake face, 8 is a circular arc blade rake face, 9 is a chip breaking groove, 10 is a center hole, 20 is a horizontal blade edge, 21 is a first rake face, 23 is an inclined surface, 24 is an arc-shaped chip breaking table, 25 is a chip breaking protrusion, 26 is an inclined section, 28 is a cutting edge chip breaking surface, 29 is a chip groove, and 30 is a center chip breaking table. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indication also changes accordingly. If the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature.

[0028] In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that ordinary skilled in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0030] Embodiment 1

[0031] The embodiment provides a heavy load machining cutting blade, such as Figures 1-2 , comprising a blade body, a cutting unit is arranged at the top corner of the blade body, and a positioning hole 10 is arranged at the geometric center of the blade body. The blade body comprises an upper surface 1, a lower surface 2 and a side surface 3 connecting the upper surface 1 and the lower surface 2, the adjacent side surfaces 3 are connected through arc surfaces 4, the side surface 3 is tangent to the upper surface 1 and / or the lower surface 2 to form a cutting edge 5, and the arc surface 4 is tangent to the upper surface 1 and / or the lower surface 2 to form an arc edge 6.

[0032] The cutting unit comprises the arc edge 6, the cutting edge 5, a rake face, an arc-shaped chip breaker 24 and a center chip breaker 30, the rake face, the chip breaker and the plane therebetween form a chip breaker groove 9. The "C" type opening direction of the arc-shaped chip breaker 24 faces the arc edge 6, the two ends of the arc-shaped chip breaker 24 are located on the rake face 7 of the cutting edge, and the end portion is transitioned to the rake face through the arc surface 4.

[0033] From the direction of the circular-arc edge 6 to the positioning hole 10, it includes the circular-arc edge 6, the rake face, the chip-breaker groove 9, the arc-shaped chip-breaker land 24, and the center chip-breaker land 30. From the direction of the cutting edge 5 to the positioning hole 10, it includes the cutting edge 5, the rake face, and the center chip-breaker land 30.

[0034] Embodiment 2

[0035] The embodiment provides a heavy-duty machining cutting blade, which comprises a blade body, a cutting unit arranged at a top corner of the blade body, and a positioning hole 10 arranged at a geometric center of the blade body. Figures 1-2 The blade body comprises an upper surface 1, a lower surface 2, and a side surface 3 connecting the upper surface 1 and the lower surface 2, adjacent side surfaces 3 are connected through a circular-arc surface 4, the side surface 3 is tangent to the upper surface 1 and / or the lower surface 2 to form a cutting edge 5, and the circular-arc surface 4 is tangent to the upper surface 1 and / or the lower surface 2 to form a circular-arc edge 6.

[0036] The cutting unit comprises the circular-arc edge 6, the cutting edge 5, the rake face, the arc-shaped chip-breaker land 24, and the center chip-breaker land 30, the rake face, the arc-shaped chip-breaker land 24, and a plane therebetween form a chip-breaker groove 9, and a chip pocket 29 is arranged between the arc-shaped chip-breaker land 24 and the center chip-breaker land 30. The circular-arc edge 6 is a horizontal edge 20, and a cutting edge bevel section 26 is arranged on the cutting edge 5 in the direction of the midpoint of the cutting edge 5 from the circular-arc edge 6. The “C”-shaped opening direction of the arc-shaped chip-breaker land 24 faces the circular-arc edge 6, both ends of the arc-shaped chip-breaker land 24 are located on the cutting edge rake face 7, and the end portions are transitioned to the rake face through the circular-arc surface 4.

[0037] From the direction of the circular-arc edge 6 to the positioning hole 10, it includes the circular-arc edge 6, the rake face, the chip-breaker groove 9, the arc-shaped chip-breaker land 24, the chip pocket 29, and the center chip-breaker land 30. From the direction of the cutting edge 5 to the positioning hole 10, it includes the cutting edge 5, the rake face, the chip pocket 29, and the center chip-breaker land 30.

[0038] Embodiment 3

[0039] The embodiment provides a heavy-duty machining cutting blade, which comprises a blade body, a cutting unit arranged at a top corner of the blade body, and a positioning hole 10 arranged at a geometric center of the blade body. Figures 1-2 The blade body comprises an upper surface 1, a lower surface 2, and a side surface 3 connecting the upper surface 1 and the lower surface 2, adjacent side surfaces 3 are connected through a circular-arc surface 4, the side surface 3 is tangent to the upper surface 1 and / or the lower surface 2 to form a cutting edge 5, and the circular-arc surface 4 is tangent to the upper surface 1 and / or the lower surface 2 to form a circular-arc edge 6.

[0040] The cutting unit includes a circular-arc edge 6, a cutting edge 5, a rake face, an arc-shaped chip-breaker 24, and a central chip-breaker 30. The rake face, the arc-shaped chip-breaker 24, and a chamfer 23 between the two form a chip-breaker groove 9. A chip pocket 29 is provided between the arc-shaped chip-breaker 24 and the central chip-breaker 30. The rake face includes a first rake face 21, a second rake face, and the second rake face includes a circular-arc edge rake face 8 and a cutting edge rake face 7. In a direction from the circular-arc edge 6 to the positioning hole 10, the circular-arc edge 6, the first rake face 21, the circular-arc edge rake face 8, the chip-breaker groove 9, the arc-shaped chip-breaker 24, the chip pocket 29, and the central chip-breaker 30 are included. In a direction from the cutting edge 5 to the positioning hole 10, the cutting edge 5, the first rake face 21, the cutting edge rake face 7, the chip pocket 29, and the central chip-breaker 30 are included.

[0041] The circular-arc edge 6 is a horizontal edge 20. A cutting edge chamfered section 26 is provided on the cutting edge 5 in a direction from the circular-arc edge 6 to a midpoint of the cutting edge 5. The arc-shaped chip-breaker 24 has a "C" type opening direction facing the circular-arc edge 6. The two ends of the arc-shaped chip-breaker 24 are located on the cutting edge rake face 7, and the end portions are connected to the rake face through a circular-arc surface 4.

[0042] A cutting edge chip-breaker surface 28 is provided between the cutting edge rake face 7 and the chip pocket 29. A plurality of chip-breaker protrusions 25 are provided on the cutting edge chip-breaker surface 28. The chip-breaker protrusions 25 are strip-shaped protrusions. One end of the chip-breaker protrusions 25 faces the cutting edge 5 and forms an inclined angle with the upper surface 1. The other end of the chip-breaker protrusions 25 faces the central hole and the end portion is connected to the chip pocket 29 through a circular-arc surface 4.

[0043] Embodiment 4

[0044] The embodiment provides a heavy-load machining cutting insert, which includes an insert body, a cutting unit provided at a top corner of the insert body, and a positioning hole 10 provided at a geometric center of the insert body. Figures 1-2 The insert body includes an upper surface 1, a lower surface 2, and a side surface 3 connecting the upper surface 1 and the lower surface 2. The adjacent side surfaces 3 are connected through a circular-arc surface 4. The side surface 3 is tangent to the upper surface 1 and / or the lower surface 2 to form a cutting edge 5. The circular-arc surface 4 is tangent to the upper surface 1 and / or the lower surface 2 to form a circular-arc edge 6.

[0045] The cutting unit includes a circular arc blade 6, a cutting blade 5, a rake face, an arc-shaped chip breaker 24 and a central chip breaker 30, the rake face, the arc-shaped chip breaker 24 and the plane therebetween form a chip breaker groove 9, and the arc-shaped chip breaker 24 and the central chip breaker 30 are provided with a chip pocket 29. The rake face includes a first rake face 21, a second rake face, the second rake face includes a circular arc blade rake face 8 and a cutting blade rake face 7, and from the circular arc blade 6 to the direction of the positioning hole 10, the circular arc blade 6, the first rake face 21, the circular arc blade rake face 8, the chip breaker groove 9, the arc-shaped chip breaker 24, the chip pocket 29 and the central chip breaker 30 are included. From the cutting blade 5 to the direction of the positioning hole 10, the cutting blade 5, the first rake face 21, the cutting blade rake face 7, the cutting blade chip breaker 28, the chip pocket 29 and the central chip breaker 30 are included.

[0046] As Figures 3-5 , the circular arc blade 6 is a horizontal blade edge 20, and the blade width L1 of the circular arc blade 6 and the cutting blade 5 is 0.05-0.2mm, preferably 0.1mm. A cutting blade beveling section 26 is provided on the cutting blade 5 in the direction of the midpoint of the cutting blade 5 from the circular arc blade 6, the interval length L of the cutting blade beveling section 26 is 3-6mm, the beveling angle is 6-8°, and the height difference between the two ends of the cutting blade beveling section 26 is 0.3-0.5mm.

[0047] The angle α of the first rake face 21 with the upper surface 1 / lower surface 2 is 3°-10°, and the angle β of the circular arc blade rake face 8 and the cutting blade rake face 7 with the upper surface 1 / lower surface 2 is 15°-30°. The "C" type opening direction of the arc-shaped chip breaker 24 faces the circular arc blade 6, the two ends of the arc-shaped chip breaker 24 are located on the cutting blade rake face 7, and the end portion transitions to the rake face through a circular arc surface 4, and the distance between the two ends and the cutting blade 5 is 0.6-0.8mm. The central chip breaker 30 is lower than the blade edge of the cutting blade 5, the height difference H is 0.1mm-0.6mm, and preferably 0.1-0.2mm.

[0048] The cutting blade chip breaker 28 is provided between the cutting blade rake face 7 and the chip pocket 29, and the cutting blade chip breaker 28 is provided with four chip breaker protrusions 25 uniformly spaced. The chip breaker protrusion 25 is a strip-shaped protrusion, one end of the chip breaker protrusion 25 faces the cutting blade 5 and has an inclination angle of 0-10° with the upper surface 1, preferably 1-2°. The other end of the chip breaker protrusion 25 faces the center hole, and the end portion is connected to the chip pocket 29 through a circular arc surface 4, and the radius R of the circular arc surface 4 is 1-5mm.

[0049] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A heavy duty machining cutting insert characterized by, The cutting blade body includes an upper surface, a lower surface, and a side surface connecting the upper surface and the lower surface, adjacent side surfaces are connected by a circular arc surface, the side surface is tangent to the upper surface and / or the lower surface to form a cutting edge, and the circular arc surface is tangent to the upper surface and / or the lower surface to form a circular arc edge. The cutting unit includes a circular arc edge, a cutting edge, a rake face, an arc-shaped chip breaker, and a central chip breaker, the rake face, the arc-shaped chip breaker, and a plane therebetween form a chip breaker groove, and in the direction from the circular arc edge to the positioning hole, the cutting unit includes the circular arc edge, the rake face, the chip breaker groove, the arc-shaped chip breaker, and the central chip breaker; the arc-shaped chip breaker is an arc-shaped protrusion, the opening direction of the arc-shaped protrusion faces the circular arc edge, and the two ends of the arc-shaped chip breaker are respectively located on the rake face of the cutting edge, and the ends are transitioned to the rake face by a circular arc surface.

2. The heavy duty machining cutting insert according to claim 1, wherein, The width L1 of the circular arc edge and the cutting edge is 0.05-0.2 mm.

3. The heavy duty machining cutting insert according to claim 1, wherein, The cutting edge is provided with an inclined cutting section that is inclined from the circular arc edge to the midpoint of the cutting edge, the interval length L of the inclined cutting section is 3-6 mm, and the height difference of the inclined cutting section is 0.3-0.5 mm.

4. The heavy duty machining cutting insert according to claim 1, wherein, The rake face includes a first rake face and a second rake face, the second rake face includes a circular arc edge rake face and a cutting edge rake face, the angle α between the first rake face and the upper surface / lower surface is 3°-10°, and the angle β between the second rake face and the upper surface / lower surface is 15°-30°.

5. The heavy duty machining cutting insert according to claim 1 wherein, The distance between the two ends of the arc-shaped chip breaker and the corresponding cutting edge is 0.6-0.8 mm.

6. The heavy duty machining cutting insert according to claim 1 wherein, The cutting edge chip breaker surface is provided between the cutting edge rake face and the central chip breaker, and the cutting edge chip breaker surface is provided with a plurality of chip breaker protrusions.

7. The heavy duty machining cutting insert according to claim 6, wherein, The chip breaker protrusion is a strip-shaped protrusion, one end of the chip breaker protrusion faces the cutting edge and forms an inclined angle with the upper surface, and the other end of the chip breaker protrusion faces the central hole and is connected by a circular arc surface.

8. The heavy duty machining cutting insert according to claim 7, wherein, The included angle γ between one end of the chip breaker protrusion and the upper positioning surface is 0°-10°, and the radius R of the circular arc surface of the other end of the chip breaker protrusion is 1-5 mm.

9. The heavy duty machining cutting insert according to claim 1 wherein, The vertical distance H between the central chip breaker and the circular arc edge is 0.1-0.6 mm.

10. The heavy duty machining cutting insert according to claim 1 wherein, The cutting blade body is a rhombic body, and the cutting blade body is provided with not less than one cutting unit.

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