U-shaped groove three-edge aluminum milling cutter
By increasing the angle between the back tool surface and the horizontal plane, the angle between the front tool surface and the cutting tool core axis position, and the setting of the spiral angle of the chip drain groove, the problem of insufficient heat dissipation during long-term processing of the milling cutter is solved, the service life and machining accuracy are improved, and the occurrence of chip accumulation is reduced.
Patent Information
- Application Number
- CN202421498316.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing three-sided edge milling cutters lack heat dissipation during long-term processing, which makes it difficult to discharge cutting heat, increases the temperature rise of the workpiece and tool, shortens the service life, and also leads to the generation of chip accumulation, affecting the processing accuracy and tool life.
A U-shaped groove triple-edge aluminum milling cutter is designed. By increasing the angle between the back tool surface and the horizontal plane, the angle between the front tool surface and the axis position of the cutting tool core, and the spiral angle of the chip discharge groove along the length direction of the tool holder part, the strength of the tool is improved, friction is reduced, chip discharge ability is enhanced, and the generation of chip accumulation tumors is reduced.
It effectively improves the service life of the tool, reduces the occurrence of chip accumulation, improves processing accuracy and efficiency, and reduces the problems of waste chip adhesion and tool temperature rise.
Smart Images
Figure CN222957579U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of milling cutters, and more specifically, to a three-edge U-groove aluminum milling cutter. Background Art
[0002] A milling cutter is a rotary cutter with one or more cutting teeth used for milling. During operation, each cutting tooth intermittently cuts off the surplus of the workpiece in turn. Milling cutters are mainly used for machining planes, steps, grooves, surface forming, etc. on milling machines.
[0003] At present, the milling cutters on the market include three-edge milling cutters, which are mainly used for machining various grooves and step surfaces. Although the cutting edges of three-edge milling cutters are sharp and the cutting process is fast, during the cutting process, due to the extrusion deformation and strong friction of metals, a built-up edge is formed between the waste chips and the rake face. As the built-up edge continuously generates and falls off, the cutting layer thickness will continuously change, which will cause the tool to vibrate, reduce the dimensional accuracy of the workpiece, and affect the service life of the tool. On the other hand, the fragments after the built-up edge falls off will also adhere to the machined surface of the workpiece, forming hard points and burrs, increasing the surface roughness of the workpiece.
[0004] The rake angle of a milling cutter is the angle formed between the intersection of the cutting edge of the milling cutter and the milling surface and the cutting edge line. By increasing this angle, the deformation of the chip, the friction between the chip and the rake face, and the cutting force can be reduced, and the generation of the built-up edge can be inhibited or the height of the built-up edge can be reduced.
[0005] Adopting the above technology can effectively inhibit the generation of the built-up edge during the cutting process of the milling cutter and reduce the problem of reduced accuracy caused by the built-up edge. However, for the three-edge milling cutter with this structure during long-term processing, the heat dissipation volume is insufficient, resulting in the difficulty of discharging the cutting heat. Instead, the temperature rise of the three-edge milling cutter and the workpiece is greater, thereby reducing the service life. Therefore, a three-edge U-groove aluminum milling cutter is proposed, which can effectively improve the service life while inhibiting the generation of the built-up edge. Content of the Utility Model
[0006] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide a three-edge U-groove aluminum milling cutter that has smooth chip evacuation during the processing, reduces the generation of cutting heat, reduces the adhesion of waste chips to the tool head, inhibits the formation of the built-up edge, reduces the occurrence of chipping, improves the service life of the tool, and improves the processing accuracy.
[0007] To achieve the above purpose, the present utility model provides the following technical solutions:
[0008] A U-shaped groove three-edge milling cutter for aluminum, including a tool shank part. The tool shank part includes a fixed tool shank set in a cylindrical structure. One end of the fixed tool shank is connected with a cutting part. A cutting tool core is arranged in the center of the cutting part. A first flank face and a second flank face are spirally arranged on the outside of the cutting tool core close to the tool shank part. The first flank face and the second flank face are symmetrically arranged about the axis of the spiral direction.
[0009] The present utility model is further arranged as follows: The diameter of the fixed tool shank is set to j, and the value of j is a cylinder with a diameter of 12 mm, and the diameter is the same as that of the outside of the cutting part. A guiding chamfer is arranged at one end of the fixed tool shank far from the cutting part.
[0010] The present utility model is further arranged as follows: The included angle between the first flank face and the horizontal direction is set to g, and the value of g is 10° - 12°. The width of the edge of the first flank face is set to d, and the value of d is 0.9 mm. The included angle between the second flank face and the horizontal plane is set to h, and the value of h is 21° - 23°. The width of the edge of the second flank face is set to e, and the value of e is 0.96 mm.
[0011] By adopting the above technical scheme: By increasing the included angle between the flank face and the horizontal plane, the strength of the tool can be improved, and at the same time, the friction between the flank face of the tool and the cutting plane can be reduced, thereby prolonging the service life of the tool.
[0012] The present utility model is further arranged as follows: A rake face is spirally arranged on one side of the cutting tool core far from the tool shank part. The included angle formed between the rake face and the axis position of the cutting tool core is set to f, and the value of f is 16° - 18°.
[0013] By adopting the above technical scheme: By increasing the included angle formed between the rake face and the axis position of the cutting tool core, the normal pressure of the chip on the rake face can be reduced, the consumed power is also reduced, the cutting force and the cutting deformation are also reduced accordingly, and it is not easy to generate built-up edge.
[0014] The present utility model is further arranged as follows: A chip removal groove is arranged between the two groups of rake faces. The chip removal groove is spirally arranged along the length direction of the tool shank part, and its angle is set to a, and the value of a is 44° - 46°.
[0015] By adopting the above technical scheme: By increasing the spiral angle of the chip removal groove along the length direction of the tool shank part, the chips generated during the workpiece processing can be smoothly discharged, the accumulation of waste chips is reduced, the generation of built-up edge is fundamentally reduced, and the processing efficiency and the service life of the tool are improved.
[0016] The present utility model is further configured as follows: a tool tip is provided at one end of the rake face away from the tool handle portion, the end of the tool tip is provided with a concave corner structure, and the concave angle thereof is c, where the value of c is 1.8° - 2.3°, the end thickness of the tool tip is set as b, the value of b is 0.214 mm - 0.218 mm, and the distance between the end of the cutting tool core and the tool tip is set as i, the value of i is 3 mm - 3.36 mm.
[0017] In summary, the present application includes at least one of the following beneficial technical effects:
[0018] 1. A first clearance angle is formed between the first flank face and the horizontal plane, and the first clearance angle is 10° - 12°. A second clearance angle is formed between the second flank face and the horizontal plane, and the second clearance angle is 21° - 23°. Increasing the clearance angle of the tool can improve the strength of the tool, reduce the friction between the flank face of the tool and the cutting plane, and thus extend the service life of the tool.
[0019] 2. A rake angle is formed between the rake face and the axis position of the cutting tool core, and the value of the rake angle is 16° - 18°. The size of the rake angle mainly affects the deformation and friction during the cutting process. A larger rake angle can reduce the normal pressure of the chip on the rake face, the consumed power is also reduced, and the cutting force and cutting deformation are also reduced accordingly, and it is not easy to generate built-up edge. The increase of the rake angle can also make the cutting edge sharp, thus making the cutting labor-saving.
[0020] 3. The helix angle between the groove line of the chip flute and the tool handle portion is 44° - 46°. The larger the included angle, the better the milling cutter can remove chips during the machining of the workpiece, reduce the accumulation of waste chips, fundamentally reduce the generation of built-up edge, and improve the machining efficiency and the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic structural diagram of a U-shaped groove three-edge aluminum milling cutter of the present utility model.
[0022] Figure 2 is Figure 1 a partial enlarged view of area A of
[0023] Figure 3 is Figure 1 a cross-sectional view along the B-B cutting direction in
[0024] Figure 4 is Figure 1 a left view of
[0025] Figure 5 is Figure 1 a dimensional schematic diagram of
[0026] Figure 6 is Figure 2 a dimensional schematic diagram of
[0027] Figure 7 is Figure 3 a dimensional schematic diagram of
[0028] Explanation of reference numerals: 1. Tool handle part; 11. Fixed tool handle; 12. Guide chamfer; 2. Cutting part; 21. Tool tip; 22. Front tool face; 23. Chip groove; 24. Cutting tool core; 25. First flank; 26. Second flank. Detailed implementation manners
[0029] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.
[0030] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.
[0031] Embodiment 1, please refer to Figures 1-7 , the present utility model provides the following technical solutions:
[0032] Specifically, it refers to a U-groove three-edge aluminum milling cutter, including a tool handle part 1 and a cutting part 2. In the tool handle part 1, there is a fixed tool handle 11 set as a cylindrical structure, and the diameter of the fixed tool handle 11 is 12 mm. By confirming the size of the fixed tool handle 11, corresponding tools can be selected according to the needs of the workpiece to be processed. At one end of the fixed tool handle 11 away from the cutting part 2, there is a guide chamfer 12. By using the guide chamfer 12, the tool can be quickly installed. On the other hand, the existence of the chamfer can reduce the cut caused by the sharp edge.
[0033] Refer to Figure 3 and 7 , in the center of the cutting part 2, there is a cutting tool core 24. A first flank 25 and a second flank 26 are spirally arranged on the outside of the cutting tool core 24 close to the tool handle part 1, and the first flank 25 and the second flank 26 are symmetrically arranged about the axis of the spiral direction. The angle between the first flank 25 and the horizontal direction is set as g, and the value of g is 10° - 12°. The width of the cutting edge of the first flank 25 is set as d, and the value of d is 0.9 mm. The angle between the second flank 26 and the horizontal plane is set as h, and the value of h is 21° - 23°. The width of the cutting edge of the second flank 26 is set as e, and the value of e is 0.96 mm. By increasing the clearance angle of the tool, the strength of the tool can be improved, and the friction between the flank of the tool and the cutting plane can be reduced, thereby prolonging the service life of the tool.
[0034] Refer to Figure 2 and 7, a rake face 22 is spirally arranged on the side of the cutting tool core 24 away from the handle part 1, and an included angle is formed between the rake face 22 and the axis position of the cutting tool core 24 and is set as f, and the value of f is 16° - 18°. By increasing the included angle between the rake face 22 and the axis position of the cutting tool core 24, the normal pressure of the chip on the rake face 22 can be reduced, the consumed power is also reduced, the cutting force and cutting deformation are also reduced accordingly, and it is not easy to generate built-up edge. The increase of the rake angle can also make the cutting edge sharp, thus making the cutting labor-saving.
[0035] Refer to Figure 2 and 5 , a chip groove 23 is arranged between the two rake faces 22, and the chip groove 23 is spirally arranged along the length direction of the handle part 1 and its angle is set as a, and the value of a is 44° - 46°. By increasing the spiral angle of the chip groove 23 along the length direction of the handle part 1, it can solve the problem of smoothly discharging the chips generated during workpiece processing, reduce the accumulation of waste chips, fundamentally reduce the generation of built-up edge, and improve the processing efficiency and tool service life.
[0036] Refer to Figure 2 and 6 , a tool tip 21 is arranged at one end of the rake face 22 away from the handle part 1, the end of the tool tip 21 is set as a concave corner structure and its concave angle is set as c, the value of c is 1.8° - 2.3°, the end thickness of the tool tip 21 is set as b, the value of b is 0.214mm - 0.218mm, and the distance between the end of the cutting tool core 24 and the tool tip 21 is set as i, the value of i is 3mm - 3.36mm. By controlling the concave angle c, the problem of difficult cutting and feeding at the internal corner can be solved, making the processing more stable, reducing the generation of vibration during the processing, thereby reducing the increase of the tool temperature caused by the friction between the tool and the workpiece, and further reducing the generation of built-up edge. At the same time, by controlling the size of the i distance, the cutting temperature is reduced, the adhesion of waste chips is reduced, the generation of built-up edge is reduced, and the service life is improved.
[0037] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
Claims
1. A U-groove three-blade aluminum milling cutter, characterized in that: The invention comprises a handle part (1), wherein the handle part (1) comprises a fixed handle (11) arranged in a cylindrical structure, one end of the fixed handle (11) is connected to a cutting part (2), a cutting core (24) is arranged at the center of the cutting part (2), and a first flank face (25) and a second flank face (26) are arranged in a spiral manner near the outer side of the handle part (1), and the first flank face (25) and the second flank face (26) are arranged symmetrically about the spiral direction axis.
2. A U-shaped groove three-blade aluminum milling cutter according to claim 1, characterized in that: The diameter of the fixed tool handle (11) is set to j, the value of j is 12 mm, and the cylindrical shape has a diameter consistent with the outer side of the cutting part (2). The fixed tool handle (11) is provided with a guide chamfer (12) at one end away from the cutting part (2).
3. A U-shaped groove three-blade aluminum milling cutter according to claim 1, characterized in that: The angle between the first back tool surface (25) and the horizontal direction is set to g, the value of g is 10°-12°, the edge width of the first back tool surface (25) is set to d, the value of d is 0.9 mm, the angle between the second back tool surface (26) and the horizontal plane is set to h, the value of h is 21°-23°, the edge width of the second back tool surface (26) is set to e, and the value of e is 0.96 mm.
4. A U-groove three-blade aluminum milling cutter according to claim 3, characterized in that: A rake face (22) is spirally arranged on one side of the cutting core (24) away from the handle portion (1), and an angle f is formed between the rake face (22) and the axis position of the cutting core (24), and the value of f is 16°-18°.
5. A U-shaped groove three-blade aluminum milling cutter according to claim 4, characterized in that: A chip removal groove (23) is arranged between the two groups of front cutting surfaces (22), and the chip removal groove (23) is spirally arranged along the length direction of the shank part (1), and its angle is set to a, and the value of a is 44°-46°.
6. A U-groove three-blade aluminum milling cutter according to claim 5, characterized in that: A cutting head (21) is arranged at one end of the front cutting surface (22) away from the shank portion (1); the end of the cutting head (21) is arranged as a concave angle structure, and the concave angle is set to c, the value of c is 1.8°-2.3°, the end thickness of the cutting head (21) is set to b, the value of b is 0.214mm-0.218mm, and the spacing between the end of the cutting core (24) and the cutting head (21) is set to i, the value of i is 3mm-3.36mm.