A high-gloss milling cutter for machining and forming aluminum alloy casing for mobile phone mid-frames

Abstract

This utility model discloses a high-gloss milling cutter for machining aluminum alloy casings for mobile phone mid-frames, relating to the field of machining equipment technology. It includes a tool holder and a cutting section at one end of the tool holder. The cutting section includes multiple cutting edges, with a helical chip removal groove of 28° arranged in a helical structure between two adjacent cutting edges. The cutting edges have end teeth, and the angle formed between each end tooth and the axis of the cutting section is a helical angle, with the difference between adjacent helical angles ranging from X° to 7°. The beneficial effects of this utility model are: differentiated end tooth helical angles (adjacent difference X°-7°): disperse cutting force fluctuations, suppress resonance effects, avoid periodic vibration marks, and improve surface finish; the arc surface (0.25mm±0.02mm, angle 10°±1°) enhances the cutting edge's resistance to chipping and prevents micro-chipping; the inclined surface (0.5mm±0.1mm, angle 26°±1°) optimizes chip flow and reduces the risk of built-up edge.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, specifically to a high-gloss milling cutter for machining and forming aluminum alloy shells for mobile phone mid-frames. Background Technology

[0002] Milling is a machining method that uses a rotating multi-edged cutting tool to cut a workpiece, thereby machining planes, grooves, curved surfaces, gears, etc. on the workpiece. It is a highly efficient machining method. A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling. During operation, the milling cutter rotates for the main motion, while the workpiece moves for the feed motion. The workpiece can also be fixed, but in this case, the rotating cutting tool must move to complete both the main motion and the feed motion. At this time, each cutting tooth intermittently removes the excess material from the workpiece, ultimately completing the machining operation.

[0003] During milling, the multi-edged structure of the milling cutter results in intermittent cutting, which inherently produces more vibration compared to other continuous cutting methods. This vibration can easily lead to tool marks on the workpiece surface, resulting in a decrease in workpiece quality. Summary of the Invention

[0004] The purpose of this invention is to address the problem of vibration marks caused by milling cutter vibration in the prior art, and to provide a high-gloss milling cutter for machining and forming aluminum alloy shells for mobile phone mid-frames.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-gloss milling cutter for machining and forming aluminum alloy shells for mobile phone mid-frames, comprising a shank and a cutting part 2 disposed at one end of the shank 1. The cutting part 2 comprises a plurality of cutting edges 21, and a spiral chip removal groove 22 with a helical angle 2111 of 35°-40° is provided between two adjacent cutting edges 21 using a spiral structure. The cutting edges 21 are provided with end teeth 211 at their ends, and the included angle formed between each end tooth 211 and the axis of the cutting part 2 is a helical angle 2111, and the difference between adjacent helical angles 2111 is in the range of X°-7°.

[0006] Furthermore, the cutting part 2 is provided with a front angle 23 and a rear angle 24, and an arc surface 25 and an inclined surface 26 are provided between the cutting edge of the cutting part 2 and the rear angle 24.

[0007] Furthermore, the width of the arc surface 25 is 0.25mm ± 0.02mm, and the angle between the arc surface 25 and the cutting edge of the cutting part 2 is 10° ± 1°.

[0008] Furthermore, the width of the inclined surface 26 is 0.5mm ± 0.1mm, and the angle between the inclined surface 26 and the cutting edge of the cutting part 2 is 26° ± 1°.

[0009] Furthermore, the core diameter of the cutting part 2 is 3.95mm with a tolerance of ±0.05mm.

[0010] Furthermore, the angle between the line connecting the tip of the cutting part 2 and the center of the core is α, which is 9.5°-10.5°.

[0011] Furthermore, the overall length of the milling cutter is 50mm with an upward deviation of 0.5mm, and the diameter is 6mm with a downward deviation of 0.02mm; wherein the length of the cutting part 2 is 15mm with a tolerance of ±0.2mm.

[0012] Furthermore, the first rear angle A of the end tooth 211 is 7°-9°, and the second rear angle B of the end tooth 211 is 15°-16°.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: Differentiated end tooth helix angle (adjacent difference X°-7°): disperses cutting force fluctuations, suppresses resonance effects, avoids periodic vibration marks, and improves surface finish; arc surface (0.25mm±0.02mm, included angle 10°±1°) enhances the chip resistance of the cutting edge and prevents micro-chipping; inclined surface (0.5mm±0.1mm, included angle 26°±1°) optimizes chip flow direction and reduces the risk of built-up edge. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a front view of the cutting part in this utility model.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the cutting part in this utility model.

[0018] Figure 4 This is a partial structural schematic diagram of the cutting part in this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Tool holder; 2. Cutting part; 21. Cutting edge; 21. End tooth; 211. Helix angle; 2111. Helical chip removal groove; 22. Rake angle; 23. Clearance angle; 24. Circular arc surface; 25. Inclined surface; 26. First clearance angle A; Second clearance angle B. Detailed Implementation

[0020] See Figure 1-4 As shown, the technical solution adopted in this specific embodiment is: a high-gloss milling cutter for machining and forming an aluminum alloy shell for a mobile phone frame, comprising a shank 1 and a cutting part 2 disposed at one end of the shank 1. Specifically, the overall length of the high-gloss cutter is 50mm with an upward deviation tolerance of 0.5mm, and the diameter is 6mm with a downward deviation tolerance of 0.02mm. The tolerance design of the overall length and diameter ensures the matching accuracy between the cutter and the machine tool interface, reducing clamping runout. The length of the cutting part 2 is 15mm with a tolerance of ±0.2mm.

[0021] The specific cutting section 2 includes multiple cutting edges 21. Between two adjacent cutting edges 21, a helical chip removal groove 22 with a helix angle 2111 of 35°-40° is arranged in a helical structure. The 28° helical chip removal groove 22 forms continuous chip removal during cutting, reducing cutting resistance, and balancing chip removal efficiency with tool rigidity, thereby reducing surface roughness problems caused by vibration. The cutting edge 21 has end teeth 211 at its end, and the included angle formed between each end tooth 211 and the axis of the cutting section 2 is a helix angle 2111. The difference between adjacent helix angles 2111 is in the range of X°-7°. The differential helix angles 2111 of the end teeth 211 disperse cutting force fluctuations, suppress resonance, and avoid periodic vibration marks.

[0022] The cutting section 2 has a rake angle 23 and a clearance angle 24. Between the cutting edge of the cutting section 2 and the clearance angle 24, there is an arc surface 25 with a width of 0.25mm ± 0.02mm and an inclined surface 26 with a width of 0.5mm ± 0.1mm. More specifically, the arc surface 25 forms an angle of 10° ± 1° with the cutting edge of the cutting section 2. The inclined surface 26 forms an angle of 26° ± 1° with the cutting edge of the cutting section 2. The arc surface 25 enhances the chip resistance of the cutting edge and prevents micro-chipping; the inclined surface 26 optimizes chip flow and reduces the risk of built-up edge.

[0023] More specifically, the core diameter of the cutting part 2 is 3.95mm with a tolerance of ±0.05mm, and the angle between the cutting tip of the cutting part 2 and the center of the core is α, which is 9.5°-10.5°.

[0024] More specifically, the first clearance angle A24 of the end tooth 211 is 7°-9°, and the second clearance angle B of the end tooth 211 is 15°-16°. The stepped clearance angle 24 of the end tooth 211 ensures the cutting edge strength and reduces the friction between the workpiece and the tool's flank face, thus extending the tool life.

[0025] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A high-gloss milling cutter for machining and forming aluminum alloy casing for mobile phone mid-frames, characterized in that: The tool includes a tool holder (1) and a cutting part (2) located at one end of the tool holder (1). The cutting part (2) includes multiple cutting edges (21). Between two adjacent cutting edges (21), a spiral chip removal groove (22) with a helical angle (2111) of 35°-40° is arranged in a spiral structure. The cutting edge (21) has end teeth (211) at its end. The included angle between each end tooth (211) and the axis of the cutting part (2) is a helical angle (2111). The difference between adjacent helical angles (2111) is in the range of X°-7°.

2. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 1, characterized in that: The cutting part (2) is provided with a front angle (23) and a rear angle (24), and an arc surface (25) and an inclined surface (26) are provided between the cutting edge of the cutting part (2) and the rear angle (24).

3. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 2, characterized in that: The width of the arc surface (25) is 0.25mm ± 0.02mm, and the angle between the arc surface (25) and the cutting edge of the cutting part (2) is 10° ± 1°.

4. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 2, characterized in that: The width of the inclined surface (26) is 0.5mm ± 0.1mm, and the angle between the inclined surface (26) and the cutting edge of the cutting part (2) is 26° ± 1°.

5. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 1, characterized in that: The core diameter of the cutting part (2) is 3.95 mm with a tolerance of ±0.05 mm.

6. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 1, characterized in that: The angle between the cutting tip (2) and the center of the cutting core is 9.5°-10.5°.

7. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 1, characterized in that: The length of the milling cutter is 50mm with an upward deviation of 0.5mm, and the diameter is 6mm with a downward deviation of 0.02mm; the length of the cutting part (2) is 15mm with a tolerance of ±0.2mm.

8. The high light milling cutter for processing and forming of the mobile phone frame aluminum alloy shell according to claim 1, characterized in that: The first back angle (A) of the end tooth (211) is 7°-9°, and the second back angle (B) of the end tooth (211) is 15°-16°.

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