Composite type high-efficiency cooling and vibration suppression hard alloy ball-end milling cutter

Abstract

The utility model provides a composite type high-efficiency cooling and vibration suppression hard alloy ball-end milling cutter which comprises a handle part and a blade part which are integrally formed, the front end of the blade part is provided with a ball head, the ball head adopts a progressive design, the radius of the ball head is gradually increased from front to back, the ball head is provided with four cutting edges, the cutting edges are provided with C-shaped chamfers, and the C-shaped chamfers are arranged on the handle part and the blade part. The tail end of the cutting edge spirally extends to the tail end of the blade part from the ball head along the blade part to form circumferential blades, a chip groove is formed between any two adjacent circumferential blades, a four-groove spiral chip groove is formed, and the circumferential blades are of unequal-pitch unequal-division structures. By optimizing the geometrical shape of the cutter, adding an efficient cooling channel and adopting a vibration suppression technology, the cutting efficiency, stability and durability of the cutter in a high-temperature and high-precision machining environment are fundamentally improved.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a composite high-efficiency cooling and vibration suppression carbide ball end mill, which is applied in the automotive and aerospace industries. Background Technology

[0002] Existing milling cutter technology often faces problems such as insufficient cooling, excessively high cutting temperatures, and rapid tool wear when milling materials such as high-temperature alloys and titanium alloys. Meanwhile, machining complex curved surfaces is often accompanied by tool vibration and fluctuating cutting forces, resulting in compromised machining accuracy and surface quality. Therefore, existing ball end mills typically face challenges such as heat accumulation, difficult chip removal, and rapid tool wear, while conventional cooling technologies cannot meet the long-term stability requirements under high-temperature environments. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a composite high-efficiency cooling and vibration suppression carbide ball end mill, which aims to fundamentally improve the cutting efficiency, stability and durability of the tool in high-temperature and high-precision machining environments by optimizing the tool geometry, increasing the high-efficiency cooling channels, and adopting innovative coating and vibration suppression technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a composite high-efficiency cooling and vibration suppression carbide ball end mill, comprising an integrally formed shank and a cutting edge. The front end of the cutting edge is provided with a ball head, which adopts a progressive design with the ball head radius gradually increasing from front to back. The ball head is provided with four cutting edges, each with a C-shaped chamfer and a major clearance angle and a minor clearance angle. The end of each cutting edge extends spirally from the ball head along the cutting edge to the end of the cutting edge to form a peripheral edge. A chip removal groove is provided between any adjacent peripheral edges, forming a four-groove spiral chip removal groove. The peripheral edge adopts an unequal pitch and unequal division structure. To facilitate a transition connection, a cylindrical connecting part is also provided between the shank and the cutting edge.

[0005] Furthermore, the cutting edge includes two radially symmetrical first cutting edges and two radially symmetrical second cutting edges, and the first cutting edges and second cutting edges are alternately arranged.

[0006] Furthermore, the peripheral cutting edge adopts an unequal pitch and unequal division structure, specifically: the peripheral cutting edge corresponding to the first cutting edge has a pitch of H1 and a helix angle of γ1, and the peripheral cutting edge corresponding to the second cutting edge has a pitch of H2 and a helix angle of γ2, satisfying the following relationships: 14mm≤H1≤15mm, 14mm≤H2≤15mm, and H2 ​

[0007] Preferably, the primary rear angle is 10° and the secondary rear angle is 6°.

[0008] Furthermore, the peripheral blade is provided with a first peripheral blade rear angle surface and a second peripheral blade rear angle surface.

[0009] Furthermore, the circumferential graduations corresponding to the first cutting edge and the second cutting edge are not equal.

[0010] Preferably, the circumferential division corresponding to the first cutting edge is 93°, and the circumferential division corresponding to the second cutting edge is 87°.

[0011] Furthermore, the handle is provided with a cooling channel extending to the chip removal groove.

[0012] Preferably, the helix angle of the chip removal groove is 40°.

[0013] Furthermore, the handle is cylindrical and has an anti-slip structure on its surface.

[0014] The beneficial effects of this utility model are:

[0015] (1) High-efficiency cooling: The designed shank cooling channel can quickly introduce coolant into the cutting zone, significantly reduce the temperature of the tool and workpiece, prevent thermal damage, and extend tool life; the four-groove spiral chip removal groove design, with a spiral angle of 40° for each groove, helps to remove larger chips and heat.

[0016] (2) Reduce vibration: Through the unequal spiral and unequal division structure and secondary clearance angle design, the tool can maintain a stable cutting state under high cutting force and high feed, reduce vibration, and improve machining accuracy and surface quality; through the fish scale cylindrical tool holder design, the clamping stability is improved;

[0017] (3) Improve machining performance: Design a C-shaped chamfer on the ball end cutting edge to improve the tool's resistance to chipping and wear resistance, and ensure high surface quality and machining accuracy. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the carbide ball end mill of this utility model.

[0020] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0021] Figure 3 This is a schematic diagram of the circumferential indexing of the carbide ball end mill of this utility model.

[0022] Figure 4 This is a schematic diagram of the ball end structure of the carbide ball end mill of this utility model.

[0023] Figure 5 yes Figure 4 A magnified structural diagram at point B in the middle.

[0024] In the figure: 1. Shank, 2. Cylindrical connecting part, 3. Cutting edge, 4. Ball end, 5. Anti-slip structure, 6. First cutting edge, 7. Second cutting edge, 8. Primary clearance angle, 9. Secondary clearance angle, 10. Circumferential cutting edge, 11. Chip removal groove, 12. First circumferential cutting edge clearance angle face, 13. Second circumferential cutting edge clearance angle face, 14. C-shaped chamfer. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components, orientations, and references (e.g., up, down, left, right, etc.) relevant to the present invention and are intended only to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0026] like Figures 1-2 As shown, this utility model discloses a composite high-efficiency cooling and vibration suppression cemented carbide ball end mill 4, comprising an integrally formed shank 1 and a cutting edge 3. A cylindrical connecting portion 2 is also provided between the shank 1 and the cutting edge 3. The shank 1 is cylindrical and has an anti-slip structure 5 on its surface. In this embodiment, the anti-slip structure 5 preferably adopts a fish-scale structure. The front end of the cutting edge 3 is provided with a ball end 4. The ball end 4 adopts a progressive design, with the radius of the ball end 4 gradually increasing from front to back. The ball end 4 is provided with four cutting edges, each with a C-shaped chamfer 14 and a primary clearance angle 8 and a secondary clearance angle 9. Preferably, the primary clearance angle 8 is 10° and the secondary clearance angle 9 is 6°. The end of the cutting edge extends spirally from the ball end 4 along the cutting edge 3 to the end of the cutting edge 3 to form a peripheral cutting edge 10. A chip removal groove 11 is provided between any adjacent peripheral cutting edges 10, forming a four-groove spiral chip removal groove. Preferably, the spiral angle of the chip removal groove 11 is 40°. The peripheral cutting edge 10 adopts an unequal pitch and unequal division structure. Specifically, the peripheral cutting edge pitch corresponding to the first cutting edge is H1, and the helix angle is γ1. The peripheral cutting edge pitch corresponding to the second cutting edge is H2, and the helix angle is γ2. This satisfies the following relationships: 14mm ≤ H1 ≤ 15mm, 14mm ≤ H2 ≤ 15mm, and H2 < H1. γ1 is 41°, and γ2 is 38°. In this embodiment, H1 = 14.8mm, and H2 = 14.1mm. The shank 1 has a cooling channel extending to the chip removal groove 11.

[0027] like Figures 3-5 As shown, the cutting edge includes two radially symmetrical first cutting edges 6 and two radially symmetrical second cutting edges 7, with the first cutting edges 6 and the second cutting edges 7 alternately arranged. The peripheral cutting edge 10 has a first peripheral clearance angle surface 12 and a second peripheral clearance angle surface 13. The circumferential graduations corresponding to the first cutting edges 6 and the second cutting edges 7 are not equal. The circumferential graduation α corresponding to the first cutting edge 6 is 93°, and the circumferential graduation β corresponding to the second cutting edge 7 is 87°.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A composite type hard metal ball end mill for high efficient cooling and vibration suppression, characterized in that: The application relates to a cutting tool, which comprises an integrated handle and blade, wherein the front end of the blade is provided with a ball head, the ball head adopts a progressive design, the radius of the ball head gradually increases from front to back, four cutting edges are arranged on the ball head, the cutting edges have C-shaped chamfers, main and secondary relief angles, the cutting edges extend helically from the ball head to the end of the blade to form a peripheral edge, a row of chip grooves is arranged between any adjacent peripheral edges, four-groove helical chip grooves are formed, and the peripheral edge adopts an unequal pitch and unequal division structure.

2. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. The cutting edges comprise two radially symmetrical first cutting edges and two radially symmetrical second cutting edges, and the first cutting edges and the second cutting edges are alternately arranged.

3. The composite high-efficiency cooling and vibration suppression carbide ball end mill as described in claim 2, characterized in that: The unequal pitch and unequal division structure of the peripheral edge is that the peripheral edge pitch corresponding to the first cutting edge is H1, the helix angle is gamma 1, the peripheral edge pitch corresponding to the second cutting edge is H2, the helix angle is gamma 2, and the following relationships are met: 14mm<=H1<=15mm, 14mm<=H2<=15mm, and H2 4. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. The main relief angle is 10 DEG, and the secondary relief angle is 6 DEG.

5. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a hardness of 92 or more on the JIS-C hardness scale. The peripheral edge is provided with a first peripheral edge relief surface and a second peripheral edge relief surface.

6. The cemented carbide ball-end mill of claim 2, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. The circumferential division corresponding to the first cutting edge and the second cutting edge is not equal.

7. The composite high-efficiency cooling and vibration suppression carbide ball end mill as described in claim 6, characterized in that: The circumferential division corresponding to the first cutting edge is 93 DEG, and the circumferential division corresponding to the second cutting edge is 87 DEG.

8. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. A cooling channel is arranged in the handle and extends to the chip groove.

9. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. The helix angle of the chip groove is 40 DEG.

10. The cemented carbide ball-end mill of claim 1, wherein: the cemented carbide ball-end mill has a diameter of 20 mm or less. The handle is cylindrical, and the surface is provided with an anti-skid structure.

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