Milling cutter for titanium alloy traceless milling

Abstract

The invention relates to the technical field of numerical control cutter production, in particular to a milling cutter for titanium alloy traceless milling, which comprises a milling cutter head and a cutter handle, the milling cutter head comprises a bottom edge arranged at the lower end part of the milling cutter head and cutting edges arranged at the periphery of the milling cutter head, and a chip groove is formed between every two adjacent cutting edges; a circular arc a is arranged between the bottom edge and the cutting edge, a circular arc b is arranged at the upper end part of the cutting edge, and the titanium alloy material is subjected to traceless milling through the circular arc a and the circular arc b; the problems that when a common milling cutter is used for machining, tool marks are inevitably generated in each time of layered cutting, stress concentration points are generated, and the material performance is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of CNC tool production, in particular to a milling cutter used for traceless milling of titanium alloys. Background Art

[0002] A milling cutter is a rotating tool with one or more teeth used for milling processing. When working, each tooth cuts off the excess of the workpiece intermittently in sequence. A Chinese invention patent with application announcement number CN113927079B discloses a multi-blade superhard milling cutter for titanium alloy, including a milling cutter body, multiple cutting parts, a chip groove and a separator. Through the improvement of the milling cutter structure, chips with a smaller spiral radius are generated during the milling process. While ensuring the structural strength of the circumferential blade, the spiral radius of the chip is minimized as much as possible, so that the chips are easier to discharge from the chip groove, thereby improving the chip removal capacity of the milling cutter.

[0003] However, the inventors found that in actual use, the elastic modulus of titanium alloy is about 1 / 2 of that of steel, so it has poor rigidity and is easy to change. Especially when processing thin-walled parts with ordinary milling cutters, each layered cutting will inevitably produce tool marks, resulting in stress concentration points, affecting material properties. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of the prior art. By arranging an arc a between the bottom edge and the cutting edge and an arc b at the upper end of the cutting edge, the arrangement of the arc a and the arc b ensures that no cutting marks will be left on the titanium alloy material during milling, thereby solving the problem that in ordinary milling cutter processing, each layered cutting will inevitably produce cutting marks, resulting in stress concentration points and affecting material properties.

[0005] In view of the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A milling cutter for seamless milling of titanium alloy comprises a milling cutter head and a shank, wherein the milling cutter head comprises a bottom blade arranged at the lower end of the milling cutter head and a cutting edge arranged at the periphery of the milling cutter head, a chip groove is provided between two adjacent cutting edges, an arc a is provided between the bottom blade and the cutting edge, an arc b is provided at the upper end of the cutting edge, and the titanium alloy material is seamlessly milled by the arc a and the arc b.

[0007] As a preferred embodiment, the radius of the arc a is set to R1, then 1mm≤R1≤3mm.

[0008] As a preferred embodiment, the radius of the arc b is set to R2, then 1mm≤R2≤3mm.

[0009] Preferably, the cutting edge comprises an upper edge, a middle edge and a lower edge from top to bottom.

[0010] As a preference, the upper blade, the middle blade and the lower blade are arranged in an arc shape.

[0011] As a preference, the offset distance between the middle blade and the upper blade and the lower blade is L, then 0.04 wire ≤ L ≤ 0.06 wire.

[0012] As a preference, the length of the cutting edge varies with the diameter of the shank.

[0013] As another preferred embodiment, the milling cutter is made of H2C material.

[0014] Beneficial effects of the present invention:

[0015] 1. In the present invention, an arc a is provided between the bottom edge and the cutting edge, an arc b is provided at the upper end of the cutting edge, and a special blade structure is adopted, which not only facilitates processing, reduces cutting vibration, and improves surface finish, but also avoids the generation of cutting marks during layered milling.

[0016] 2. When the milling cutter in the present invention is milling titanium alloy material, the titanium alloy material will generate a rebound force on the milling cutter, causing the milling cutter to move away from the surface of the titanium alloy material. By arranging the upper blade, the middle blade and the lower blade in an arc shape, when the milling cutter is bounced away, the middle blade can still mill the surface of the titanium alloy material.

[0017] In summary, the device has the advantage of improving surface finish and is particularly suitable for the field of CNC tool production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of a milling cutter used for traceless milling of titanium alloy;

[0020] Figure 2 A front view of a milling cutter for mark-free milling of titanium alloy;

[0021] Figure 3 is a schematic diagram of the structure of arc a;

[0022] Figure 4 is a schematic diagram of the structure of arc b;

[0023] Figure 5 is a schematic diagram of the structure of the cutting edge;

[0024] Figure 6This is a working state diagram of the milling cutter used for mark-free milling of titanium alloy.

[0025] 1. Milling cutter head; 2. Tool holder; 3. Chip groove; 4. Arc a; 5. Arc b; 11. Bottom edge; 12. Cutting edge; 121. Upper edge; 122. Middle edge; 123. Lower edge. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0027] Embodiment 1

[0028] like Figures 1 to 6 As shown, a milling cutter for seamless milling of titanium alloy includes a milling cutter head 1 and a shank 2, wherein the milling cutter head 1 includes a bottom blade 11 arranged at the lower end of the milling cutter head 1 and a cutting edge 12 arranged at the periphery of the milling cutter head 1, a chip groove 3 is provided between two adjacent cutting edges 12, an arc a4 is provided between the bottom blade 11 and the cutting edge 12, an arc b5 is provided at the upper end of the cutting edge 12, and the titanium alloy material is seamlessly milled by the arcs a4 and b5.

[0029] It is worth mentioning here that by setting an arc a4 between the bottom edge 11 and the cutting edge 12, and setting an arc b5 at the upper end of the cutting edge 12, a special blade structure is adopted, which not only makes the processing easier, reduces cutting vibration, and improves surface finish, but also avoids the generation of tool marks during layered milling.

[0030] like Figure 3 As shown, the radius of arc a4 is set to R1, then 1mm≤R1≤3mm.

[0031] In this example, the smoothness of the cutting surface is improved by adjusting the radius of the arc a4.

[0032] like Figure 4 As shown, the radius of arc b5 is set to R2, then 1mm≤R2≤3mm.

[0033] In this example, the surface finish of the cutting is improved by adjusting the radius of the arc b5.

[0034] like Figure 2 As shown, the cutting edge 12 includes an upper edge 121 , a middle edge 122 and a lower edge 123 from top to bottom.

[0035] like Figure 5 As shown, the upper blade 121, the middle blade 122 and the lower blade 123 are arranged in an arc shape.

[0036] It is worth mentioning here that when the milling cutter is milling titanium alloy material, the titanium alloy material will generate a rebound force on the milling cutter, causing the milling cutter to move away from the surface of the titanium alloy material. By arranging the upper blade 121, the middle blade 122 and the lower blade 123 in an arc shape, when the milling cutter is bounced away, the middle blade 122 can still mill the surface of the titanium alloy material.

[0037] like Figure 5 As shown, the offset distance between the middle blade 122 and the upper blade 121 and the lower blade 123 is L, then 0.04 wire≤L≤0.06 wire.

[0038] The length of the cutting edge 12 varies with the diameter of the shank 2 .

[0039] In this example, titanium alloy materials of different sizes are processed by changing the edge length of the cutting edge 12 .

[0040] The milling cutter is made of H2C material.

[0041] In this example, H2C material has a higher hardness and has a good cutting effect on titanium alloy materials.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A milling cutter for seamless milling of titanium alloy, comprising a milling cutter head (1) and a cutter handle (2), characterized in that: The milling cutter head (1) comprises a bottom blade (11) arranged at the lower end of the milling cutter head (1) and a cutting edge (12) arranged at the periphery of the milling cutter head (1); a chip removal groove (3) is provided between two adjacent cutting edges (12); an arc a (4) is provided between the bottom blade (11) and the cutting edge (12); an arc b (5) is provided at the upper end of the cutting edge (12); and titanium alloy material is milled without a mark by the arc a (4) and the arc b (5).

2. A milling cutter for seamless milling of titanium alloy according to claim 1, characterized in that: The radius of the arc a(4) is set to R1, then 1mm≤R1≤3mm.

3. The milling cutter for seamless milling of titanium alloy according to claim 1, characterized in that: The radius of the arc b(5) is set to R2, then 1mm≤R2≤3mm.

4. The milling cutter for seamless milling of titanium alloy according to claim 1, characterized in that: The cutting edge (12) comprises, from top to bottom, an upper edge (121), a middle edge (122) and a lower edge (123).

5. The milling cutter for seamless milling of titanium alloy according to claim 4, characterized in that: The upper blade (121), the middle blade (122) and the lower blade (123) are arranged in an arc shape.

6. A milling cutter for seamless milling of titanium alloy according to claim 5, characterized in that: The offset distance between the middle blade (122) and the upper blade (121) and the lower blade (123) is L, and 0.04 wire ≤ L ≤ 0.06 wire.

7. The milling cutter for seamless milling of titanium alloy according to claim 1, characterized in that: The length of the cutting edge (12) varies with the diameter of the shank (2).

8. The milling cutter for seamless milling of titanium alloy according to claim 1, characterized in that: The milling cutter is made of H2C material.

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