A T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone case

Abstract

The present invention discloses a T-shaped milling cutter for processing the volume key groove on the side wall of a mobile phone shell, which comprises a tool shank and a disc-shaped cutter core. The disc-shaped cutter core is coaxially connected to the end of the tool shank. Eight cutting edges are circumferentially and evenly arranged on the disc-shaped cutter core. The cutting edge diameter formed by the eight cutting edges is 9 mm. The spiral directions of adjacent cutting edges are opposite. Among them, the spiral angles of four right-handed cutting edges are 15 degrees, and the spiral angles of four left-handed cutting edges are 15 degrees. A counterbore is provided on the lower end face of the disc-shaped cutter core. By adopting the present invention, it has the advantages of reasonable and reliable structure, strong rigidity, high service life, high processing efficiency, and can ensure the smooth processing of the volume key groove on the side wall of the mobile phone shell by the cutter.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining tools, and particularly relates to a T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell. Background Art

[0002] In this era of highly developed electronic products, high-end smart phones have become the most popular hot-selling products in the market. Therefore, the requirements for the machining of mobile phone shells are getting higher and higher. There are always many deficiencies in the machining of the volume key groove on the side wall. Due to the limitation of the size of the key groove itself, the machining efficiency is low and the tool consumption is large. This is because of the limitation of the size of the key groove itself, resulting in a very thin T position of the T-shaped milling cutter. So there are difficulties in machining the tool itself. The same is true when using the T-shaped milling cutter to machine the key groove. The damage rate of the tool is relatively high, and the outer diameter of the tool itself is small, so the entire key groove cannot be machined quickly. Summary of the Invention

[0003] The purpose of the present invention is to provide a T-shaped milling cutter with reasonable and reliable structure, strong rigidity, high service life, high machining efficiency, and capable of ensuring the smooth machining of the volume key groove on the side wall of a mobile phone shell by the tool.

[0004] To achieve the above purpose, the present invention provides a T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell, which includes a tool shank and a disc-shaped cutter core. The disc-shaped cutter core is coaxially connected to the end of the tool shank. Eight cutting edges are evenly arranged in the circumferential direction of the disc-shaped cutter core. The cutting edge diameter formed by the eight cutting edges is 9 mm. The spiral directions of adjacent cutting edges are opposite. Among them, the spiral angles of four right-handed cutting edges are 15 degrees, and the spiral angles of four left-handed cutting edges are 15 degrees. A counterbore is provided on the lower end face of the disc-shaped cutter core.

[0005] As a preferred solution of the present invention, the diameter of the counterbore is 7.2 mm to 7.5 mm, and the depth of the counterbore is 0.2 mm.

[0006] As a preferred solution of the present invention, the thickness of the disc-shaped cutter core is 0.4 mm.

[0007] As a preferred solution of the present invention, the core thickness of the disc-shaped cutter core is 6.5 mm.

[0008] As a preferred solution of the present invention, the cutting edge is provided with an outer circumferential edge, an upper end edge and a lower end edge. The outer circumferential edge is formed on the outer circumference of the disc-shaped cutter core. The upper end edge is formed on the upper end face of the disc-shaped cutter core. The lower end edge is formed on the lower end face of the disc-shaped cutter core.

[0009] As a preferred solution of the present invention, the clearance angle of the lower end edge is 3 degrees.

[0010] As a preferred solution of the present invention, the rake angle of the lower end edge is 1 degree.

[0011] As a preferred embodiment of the present invention, the clearance angle of the upper edge is 1.5 degrees.

[0012] As a preferred embodiment of the present invention, the clearance angle of the outer circumferential edge is successively provided with a first clearance angle and a second clearance angle from the cutting edge to the inner side, the first clearance angle is 12 degrees, and the second clearance angle is 25 degrees.

[0013] As a preferred embodiment of the present invention, the tool shank includes a tool handle, a tapered portion connecting the tool handle, and a tool stem connecting the tapered portion and the disc-shaped tool core. The diameter of the tool handle is 10 mm, the diameter of the tool stem is 4.4 mm, and the taper of the tapered portion is 30 degrees.

[0014] Implementing the T-shaped milling cutter for machining the volume key groove on the side wall of the mobile phone shell provided by the present invention, compared with the prior art, its beneficial effects are as follows:

[0015] (1) By increasing the outer diameter of the tool, that is, designing the cutting edge diameter of the disc-shaped tool core to be 9 mm, the present invention is beneficial to quickly machining the entire key groove;

[0016] (2) The disc-shaped tool core of the present invention adopts an 8-edge structure and is designed in a left- and right-handed form. Among them, the helix angle of 4 right-handed cutting edges is 15 degrees, and the helix angle of 4 left-handed cutting edges is 15 degrees. Such a design can greatly improve the machining efficiency and service life of the tool;

[0017] (3) By designing a counterbore on the lower end face of the disc-shaped tool core, on the one hand, the strength and rigidity of the tool can be improved, further improving the service life of the tool. On the other hand, there is no need to open a tooth gap in the middle of the lower end face of the disc-shaped tool core, reducing the manufacturing difficulty of the tool. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0019] Figure 1 is a schematic structural diagram of a T-shaped milling cutter for machining the volume key groove on the side wall of the mobile phone shell provided by the present invention;

[0020] Figure 2 is Figure 1 a partial enlarged view of the disc-shaped tool core area in the above structure;

[0021] Figure 3 is a schematic structural diagram of the cutting edge of the disc-shaped tool core. Detailed Embodiments

[0022] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the machine or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0024] As Figures 1 to 3 shown, a T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell in a preferred embodiment of the present invention includes a tool shank 1 and a disc-shaped cutter core 2. The disc-shaped cutter core 2 is coaxially connected to the end of the tool shank 1. Eight cutting edges 3 are circumferentially and evenly arranged on the disc-shaped cutter core 2. The cutting diameter formed by the eight cutting edges 3 is 9 mm. The spiral directions of adjacent cutting edges 3 are opposite. Among them, the spiral angles of four right-handed cutting edges are 15 degrees, and the spiral angles of four left-handed cutting edges are 15 degrees. A counterbore 4 is provided on the lower end face of the disc-shaped cutter core 2.

[0025] Therefore, the key points of a T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell in an embodiment of the present invention are as follows: First, by increasing the outer diameter of the tool, that is, designing the cutting diameter of the disc-shaped cutter core 2 to be 9 mm, it is beneficial to quickly machine the entire key groove; Second, the disc-shaped cutter core 2 adopts an eight-edge structure and is designed in a left- and right-handed form. Among them, the spiral angles of four right-handed cutting edges are 15 degrees, and the spiral angles of four left-handed cutting edges are 15 degrees. Such a design can greatly improve the machining efficiency and service life of the tool; Third, by designing a counterbore 4 on the lower end face of the disc-shaped cutter core 2, on the one hand, it can improve the strength and rigidity of the tool and further improve the service life of the tool. On the other hand, there is no need to open a tooth gap in the middle of the lower end face of the disc-shaped cutter core 2, reducing the manufacturing difficulty of the tool.

[0026] Exemplarily, to ensure the strength and rigidity of the tool, the thickness of the disc-shaped cutter core 2 is 0.4 mm, the diameter of the counterbore 4 is 7.2 mm - 7.5 mm, the depth of the counterbore 4 is 0.2 mm, and the core thickness of the disc-shaped cutter core 2 is 6.5 mm.

[0027] Exemplarily, to ensure the machining efficiency of the cutting tool, the cutting edge 3 is provided with an outer circumferential edge 31, an upper end edge 32 and a lower end edge 33. The outer circumferential edge 31 is formed on the outer circumference of the disc-shaped cutter core 2, the upper end edge 32 is formed on the upper end face of the disc-shaped cutter core 2, and the lower end edge 33 is formed on the lower end face of the disc-shaped cutter core 2. In this embodiment, the clearance angle of the lower end edge 33 is 3 degrees, and the inclination angle of the lower end edge 33 is 1 degree; the clearance angle of the upper end edge 32 is 1.5 degrees; the clearance angle of the outer circumferential edge 31 is provided with a first clearance angle and a second clearance angle in sequence from the cutting edge to the inside. The first clearance angle is 12 degrees, and the second clearance angle is 25 degrees. Such a design not only ensures the rigidity of the cutting tool but also ensures that the cutting force of the cutting tool is not affected.

[0028] Exemplarily, the tool shank 1 includes a tool handle 11, a tapered portion 12 connecting the tool handle 11, and a tool stem 13 connecting the tapered portion 12 and the disc-shaped cutter core 2. The diameter of the tool handle 11 is 10 mm, the diameter of the tool stem 13 is 4.4 mm, and the taper of the tapered portion 12 is 30 degrees. In this embodiment, the total length of the T-shaped milling cutter is 50 mm.

[0029] It should also be noted that the T-shaped milling cutter adopts a passivation process. After the cutting tool is manufactured, it is passivated to remove burrs and passivate the cutting edge to ensure the wear resistance of the cutting tool.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell, characterized in that, it includes a tool shank and a disc-shaped cutter core. The disc-shaped cutter core is coaxially connected to the end of the tool shank. Eight cutting edges are circumferentially and evenly arranged on the disc-shaped cutter core. The cutting diameter formed by the eight cutting edges is 9 mm. The spiral directions of adjacent cutting edges are opposite. Among them, the spiral angles of four right-handed cutting edges are 15 degrees, and the spiral angles of four left-handed cutting edges are 15 degrees. A counterbore is provided on the lower end face of the disc-shaped cutter core. The cutting edge is provided with an outer circumferential edge, an upper edge and a lower edge. The outer circumferential edge is formed on the outer circumference of the disc-shaped cutter core. The back angles of the outer circumferential edge are successively provided with a first back angle and a second back angle from the cutting edge to the inside. The first back angle is 12 degrees, and the second back angle is 25 degrees. The upper edge is formed on the upper end face of the disc-shaped cutter core. The back angle of the upper edge is 1.5 degrees. The lower edge is formed on the lower end face of the disc-shaped cutter core. The back angle of the lower edge is 3 degrees.

2. The T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell according to claim 1, characterized in that, the diameter of the counterbore is 7.2 mm to 7.5 mm, and the depth of the counterbore is 0.2 mm.

3. The T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell according to claim 1, characterized in that, the thickness of the disc-shaped cutter core is 0.4 mm.

4. The T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell according to claim 1, characterized in that, the core thickness of the disc-shaped cutter core is 6.5 mm.

5. The T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell according to claim 1, characterized in that, the edge inclination angle of the lower edge is 1 degree.

6. The T-shaped milling cutter for machining the volume key groove on the side wall of a mobile phone shell according to any one of claims 1 to 5, characterized in that, the tool shank includes a tool handle, a tapered portion connecting the tool handle, and a tool stem connecting the tapered portion and the disc-shaped cutter core. The diameter of the tool handle is 10 mm, the diameter of the tool stem is 4.4 mm, and the taper of the tapered portion is 30 degrees.

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