Indexable wave-shaped edge turning tool blade

Abstract

The utility model discloses an indexable wave-shaped edge turning blade which comprises a blade body with a center hole in the geometric center, a cutting unit is arranged on the upper surface of the blade body, and the cutting unit comprises an arc edge located at the vertex angle of the blade body and a main cutting edge connected with the two ends of the arc edge. Chip flutes are formed in the main cutting edge in the direction extending towards the center hole, and every two adjacent chip flutes located at the vertex angle are symmetrically separated through an isolation belt; the main cutting edge includes a wave-shaped cutting edge, the wave shape of which is shaped in an axial direction. Through the design of the wave-shaped cutting edges, the chip flutes and the isolation belts, the cutting force is effectively reduced, the chip treatment is improved, the quality of the machined surface is remarkably improved, and the service life of the cutter is remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cemented carbide blades, in particular to an indexable corrugated-edge turning blade. Background Art

[0002] In the finishing condition of steel parts, it is necessary to ensure that the workpiece achieves a higher precision and surface smoothness, so the requirements for turning inserts are relatively high. The turning inserts must have sufficient sharpness, smaller cutting force, and good chip breaking, chip separation and chip removal effects.

[0003] In the prior art, although some cutting blades ensure the sharpness of the cutting edge while also taking into account a good chip breaking effect, and can ensure the sharpness of the blade in fine processing and a certain smoothness of the surface of the workpiece, when the blade is cutting, the chips are easy to flow to the processed surface, thereby causing the smoothness of the processed surface to be destroyed; there are also some cutting blades that ensure the sharpness of the cutting edge while taking into account good chip breaking, chip separation and chip removal effects, but the amplitude of the vibration caused by the cutting force is large, resulting in an unstable cutting process, and the workpiece cannot guarantee higher processing accuracy and surface finish. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an indexable corrugated-edge turning insert.

[0005] The technical solution of the utility model is: an indexable wavy-edge turning insert, comprising a insert body with a center hole at the geometric center, a cutting unit being provided on the upper surface of the insert body, the cutting unit comprising an arc edge located at the top corner of the insert body and a main cutting edge connecting the two ends of the arc edge; a chip groove is provided in the direction in which the main cutting edge extends toward the center hole, and two adjacent chip grooves located at the top corner are symmetrically separated by an isolation zone; the main cutting edge comprises a wavy cutting edge, and the waveform of the wavy cutting edge is formed along the axial direction.

[0006] Further: the isolation zone includes a wedge-shaped chip breaker and a V-shaped chip breaker, and the wedge-shaped chip breaker and the V-shaped chip breaker are arranged in sequence in the extension direction of the arc blade to the center hole. The wedge-shaped chip breaker is in the shape of an inclined ridge, one end of the wedge-shaped chip breaker extends to the lower part of the chip groove, and the other end of the wedge-shaped chip breaker is connected to the V-shaped chip breaker.

[0007] Furthermore: a cambered protrusion is arranged in the chip groove, the cambered protrusion is a long raised arc, and the cambered protrusion extends along the direction of the main cutting edge and forms a new chip breaker groove with the front of the groove.

[0008] Furthermore: the blade body also includes a blade support portion located in the central area, the blade support portion is a high boss structure, and the plane where the top of the blade support portion is located is higher than the plane where the main cutting edge of the upper surface is located.

[0009] Furthermore: the front face of the chip groove rises and falls along with the wavy cutting edge to form a wavy curved surface.

[0010] Furthermore: the main cutting edge includes a straight cutting edge, and both ends of the straight cutting edge are transitionally connected to the wave cutting edge and the arc cutting edge respectively.

[0011] Furthermore: the blade body is a triangular pyramid structure, with two side faces between every two edges of the triangular pyramid, the side angle formed by the intersection of the two side faces between the two edges is 160°, and the angular angle formed by the intersection of the two side faces at the vertex is 80°.

[0012] Furthermore: the rake angle γ of the chip groove is 17° to 19°.

[0013] Furthermore: the upper surface has a chamfer around the entire cutting edge of the turning blade, and the chamfer has a value of 0.17mm to 0.20mm.

[0014] Further: a cutting unit is provided on the lower surface of the blade body.

[0015] The beneficial technical effects of the utility model are: through the design of the corrugated cutting edge, the cutting force is effectively reduced, thereby reducing the generation of vibration and heat, effectively improving the quality of the machined surface, reducing the wear of the turning blade, and extending the service life of the turning blade; through the design of the chip groove and the isolation belt, the chips can be effectively accommodated and discharged to prevent the chips from flowing to the machined surface, thereby ensuring the smoothness of the machined surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This utility model Figure 1 Schematic diagram of local structure;

[0018] Figure 3 It is a schematic diagram of the blade support portion of the utility model;

[0019] Figure 4 It is a schematic diagram of the upper surface structure of the utility model;

[0020] Figure 5 This utility model Figure 4 Schematic diagram of BB structure;

[0021] in:

[0022] γ, chip groove front angle; β, side angle; α, angular angle;

[0023] 1. Blade body; 2. Upper surface; 3. Lower surface; 4. Side surface; 5. Arc surface; 6. Center hole; 7. Arc edge; 8. Main cutting edge; 9. Blade support; 10. Chip groove; 101. Front of groove; 102. Back of groove; 103. Bottom of groove; 11. Arc surface protrusion; 12. Wedge-shaped chip breaker; 13. V-shaped chip breaker; 14. Chamfer. DETAILED DESCRIPTION

[0024] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0025] like Figure 1 to Figure 2 As shown, the indexable corrugated edge turning insert provided by the utility model comprises a insert body 1, which is surrounded by an upper surface 2, a lower surface 3, six side surfaces 4 and an arc surface 5 between two side surfaces 4 located at the top corners. A center hole 6 is provided at the geometric center of the insert body 1, and cutting units are provided on the upper surface 2 and the lower surface 3 of the insert body 1. Each of the cutting units comprises an arc edge 7 located at the top corner and a main cutting edge 8 connecting the two ends of the arc edge 7, and the arc edge 7 and the main cutting edge 8 are formed by the intersection of the upper surface 2 and the side surface 4.

[0026] like Figure 3 The blade body 1 also includes a blade support portion 9 located in the central area, and the blade support portion 9 provides sufficient strength for the turning blade to ensure the stability of the turning blade during the chip cutting process. A chip groove 10 is provided between the blade support portion 9 and the main cutting edge 8. The chip groove 10 is an arc-shaped groove, including a groove front face 101, a groove rear face 102 and a groove bottom surface 103 located between the groove front face 101 and the groove rear face 102. The groove front face 101 is adjacent to the main cutting edge 8, and the groove front face 101 is the main cutting front face of the main cutting edge 8; the groove rear face 102 is adjacent to the blade support portion 9.

[0027] The chip groove 10 has an extra-large chip space. When the turning insert cuts the workpiece, the chips flow out from the front of the main cutting edge and roll up in the extra-large chip space of the chip groove 10. As the length of the outflowing chips increases, the rolled up chips will eventually break naturally and be discharged.

[0028] Furthermore, the blade support portion 9 is a high boss structure, that is, the plane where the top of the blade support portion 9 of the upper surface 2 is located is higher than the plane where the main cutting edge 8 of the upper surface 2 is located. The high boss structure makes it easy for the turning blade to roll and break chips, and the chip breaking effect is good, thereby reducing the wear of chips and the processed surface during the cutting process.

[0029] Furthermore, in order to adapt to the working condition of the turning insert for fine machining, a cambered protrusion 11 is provided in the chip groove 10, and the cambered protrusion 11 is a long raised arc, and the cambered protrusion 11 extends along the main cutting edge 8, and forms a new chip breaker with the groove front 101. When the turning insert cuts the workpiece, the chips curl at the cambered protrusion 11 to form a cutting with a smaller curling radius, and quickly break the finely machined thin and long chips, avoiding high temperature caused by long curled chips, and contact wear on the machined surface, etc.; moreover, rapid chip breaking can quickly take away the heat from the workpiece and the insert body, greatly improving the service life of the turning insert.

[0030] Furthermore, the main cutting edge 8 includes a straight cutting edge 81 and a corrugated cutting edge 82. The straight cutting edge 81 is transitionally connected with the arc edge 7, and the straight cutting edge 81 can ensure stable cutting. The waveform of the corrugated cutting edge 82 is formed along the axial direction. Each corrugated unit includes a crest, a trough and a curve between the crest and the trough. During the cutting process, the crests, the troughs and the curves between the crests and the troughs have different force application points and directions, so that the cutting force is distributed in different directions on the same corrugated unit, so as to effectively reduce the cutting force of the corrugated cutting edge 82 in the same direction. The reduction in cutting force means that the interaction force between the turning blade and the workpiece is reduced, thereby reducing the generation of vibration and heat, and further reducing the wear of the turning blade and surface defects. In addition, the amplitude of vibration is reduced, so the stable cutting process can ensure higher machining accuracy and better surface finish; thereby effectively improving the quality of the machined surface.

[0031] The distance between the wave crests and the wave troughs and the wave height of the wave cutting edge 82 are designed according to the specific processing materials and processing requirements to achieve the best cutting effect.

[0032] like Figures 4 to 5 The front face 101 of the chip groove 10 rises and falls with the wave cutting edge 82 to form a wave curved surface, and the two adjacent curved surface protrusions of the wave curved surface play a better chip breaking and separation ability, and guide the cutting flow to the back face 102 of the groove through the curved surface protrusions. The large inclination design of the front angle γ of the chip groove cooperates with the wave cutting edge 82, which ensures that the turning insert has good chip breaking and separation ability while ensuring the sharpness of the turning insert.

[0033] Furthermore, the circular arc blade 7 is provided with a wedge-shaped chip breaker 12 and a V-shaped chip breaker 13 along the extension direction of the center hole 6. The wedge-shaped chip breaker 12 is in the shape of an inclined ridge, one end of the wedge-shaped chip breaker 12 extends to the lower part of the chip groove 10, and the other end of the wedge-shaped chip breaker 12 is connected to the V-shaped chip breaker 13. The V-shaped chip breaker 13 is connected to the blade support part 9 or is integrally formed. The wedge-shaped chip breaker 12 and the V-shaped chip breaker 13 form an isolation zone that symmetrically separates two adjacent chip grooves 10 at the top corner. When the turning blade is cutting, the isolation zone can prevent chips from flowing to the machined surface, and prevent the accuracy and finish of the machined surface from being damaged by chips.

[0034] In this example, the blade body 1 has a triangular pyramid structure, and each two edges of the triangular pyramid are connected by two side surfaces 4, and then connected by an arc surface 5 at the vertex. The side angle β formed by the intersection of the two side surfaces 4 between the two edges is 160°, and the angular angle α formed by the intersection of the two side surfaces 4 at the vertex is 80°.

[0035] Preferably, the chip groove front angle γ is 17° to 19°, and the upper surface 2 has a chamfer 14 around the entire cutting edge of the turning insert. The chamfer 14 is used to increase the blade strength and improve the durability of the turning insert. The chamfer 14 is 0.17mm to 0.20mm.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An indexable wavy-edge turning insert, comprising an insert body (1) having a center hole (6) at its geometric center, a cutting unit being provided on an upper surface (2) of the insert body (1), the cutting unit comprising a circular arc edge (7) located at a top corner of the insert body (1) and a main cutting edge (8) connecting two ends of the circular arc edge (7); characterized in that: A chip groove (10) is provided in the direction in which the main cutting edge (8) extends toward the center hole (6), and two adjacent chip grooves (10) located at the top corners are symmetrically separated by an isolation zone; The main cutting edge (8) comprises a corrugated cutting edge (82), the corrugation of the corrugated cutting edge (82) being formed along the axial direction.

2. The indexable corrugated edge turning insert according to claim 1, characterized in that: The isolation zone comprises a wedge-shaped chip breaker (12) and a V-shaped chip breaker (13), wherein the wedge-shaped chip breaker (12) and the V-shaped chip breaker (13) are sequentially arranged in the extension direction of the arc blade (7) toward the center hole (6), wherein the wedge-shaped chip breaker (12) is in the shape of an inclined ridge, wherein one end of the wedge-shaped chip breaker (12) extends to the lower part of the chip groove (10), and the other end of the wedge-shaped chip breaker (12) is connected to the V-shaped chip breaker (13).

3. The indexable corrugated edge turning insert according to claim 1, characterized in that: The chip groove (10) is provided with a cambered protrusion (11), which is in the form of a long raised arc. The cambered protrusion (11) extends in the direction of the main cutting edge (8) and forms a new chip breaker groove with the groove front (101).

4. The indexable corrugated edge turning insert according to claim 1, characterized in that: The blade body (1) further comprises a blade support portion (9) located in the central area, wherein the blade support portion (9) is a high boss structure, and the plane where the top of the blade support portion (9) is located is higher than the plane where the main cutting edge (8) of the upper surface (2) is located.

5. The indexable corrugated edge turning insert according to claim 1, characterized in that: The front face (101) of the chip groove (10) rises and falls along with the wavy cutting edge (82) to form a wavy curved surface.

6. The indexable corrugated edge turning insert according to claim 1, characterized in that: The main cutting edge (8) comprises a straight cutting edge (81), and two ends of the straight cutting edge (81) are transitionally connected to the wave cutting edge (82) and the circular arc cutting edge (7) respectively.

7. The indexable corrugated edge turning insert according to claim 1, characterized in that: The blade body (1) is in the form of a triangular pyramid structure. There are two side faces (4) between every two edges of the triangular pyramid. The side angle formed by the intersection of the two side faces (4) located between the two edges is 160°. The angular angle formed by the intersection of the two side faces (4) located at the vertex is 80°.

8. The indexable corrugated edge turning insert according to claim 1, characterized in that: The chip groove front angle (γ) is 17° to 19°.

9. The indexable corrugated edge turning insert according to claim 1, characterized in that: The upper surface (2) is provided with a chamfer (14) around the entire cutting edge of the turning blade, and the chamfer (14) has a value of 0.17 mm to 0.20 mm.

10. The indexable corrugated edge turning insert according to claim 1, characterized in that: The lower surface (3) of the blade body (1) is provided with a cutting unit.

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