A straightening inner ring groove milling cutter

Abstract

This utility model relates to a solid-hardened internal annular groove end mill, applied in the field of end mill technology. It includes a cutter body and several chisel edges, which are circumferentially distributed on the annular side of the cutter body. Each chisel edge has a cutting edge on one side; the cutting edge is inclined to the rotation axis of the cutter body, and adjacent cutting edges have different inclination directions. Because adjacent cutting edges have different inclination directions, during cutting, the cutting edges of adjacent chisel edges intersect at different inclinations, effectively reducing the cutting resistance when the tool enters the workpiece, thereby increasing the stability of the tool during machining.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular to a solid hardened internal annular groove milling cutter. Background Technology

[0002] A solid hardened end mill is a type of end mill used in metal milling. Its key characteristic is that it undergoes a solid hardening treatment during manufacturing, giving it high wear resistance, heat resistance, and hardness, typically between 60-65 HRC. The main advantages of solid hardened end mills include good stability and rigidity during high-speed cutting and a long service life, making them widely used in the field of metal milling.

[0003] A solid-hardened internal groove end mill is a type of solid-hardened end mill used to cut annular grooves on the inner circle of a workpiece. When in use, the internal groove end mill primarily cuts using several circumferentially distributed chisel edges. Due to the uniformity of these chisel edges, the cutting resistance when the tool enters the workpiece is relatively high, affecting the stability of the tool during machining.

[0004] In view of this, there is an urgent need for a solid hardened internal annular groove end mill to solve the above problems. Summary of the Invention

[0005] In order to help solve the problems existing in the prior art, the present invention provides a solid hardened internal annular groove end mill, which adopts the following technical solution: including: a cutter body and several transverse cutting edges, the several transverse cutting edges are distributed in a circle on the annular side of the cutter body, and a cutting edge is provided on one side of each transverse cutting edge;

[0006] The cutting edge is inclined to the axis of rotation of the blade body, and the inclination direction of two adjacent cutting edges is different.

[0007] Its further feature is that,

[0008] The cutting edge is provided with a front angle α, the degree of which is between 4 and 6 degrees.

[0009] A chip-collecting groove is provided between each two adjacent transverse cutting edges, and the included angle between the two side walls of the chip-collecting groove is between 75 degrees and 85 degrees.

[0010] The transverse blade is provided with a rear angle β, the degree of which is between 10 degrees and 12 degrees.

[0011] The angle between the extended surface at the connection between the transverse blade and the blade body and the cutting plane is γ, and the degree of γ is 16 to 20 degrees.

[0012] The transverse blade has a chamfer on one side of the cutting edge, and the chamfers on two adjacent transverse blades are in opposite directions.

[0013] Each of the cutting edges has an inclined surface on the side away from the chamfer, the inclined surface extending from one side of the cutting edge toward the side away from the cutting edge.

[0014] The top and bottom surfaces of the transverse blade are both inclined, and the inclination direction is from the side of the transverse blade away from the blade body to the side of the transverse blade closer to the blade body towards the inside of the transverse blade.

[0015] The blade body is provided with mounting holes coaxially.

[0016] A positioning groove is provided on the circumferential side of the mounting hole.

[0017] The above-described structure of this utility model can achieve the following beneficial effects:

[0018] Because the inclination directions of two adjacent cutting edges are different, the staggered inclination of the cutting edges of two adjacent transverse cutting edges during cutting can effectively reduce the cutting resistance when the tool enters the workpiece, thereby increasing the stability of the tool during machining. Attached Figure Description

[0019] Figure 1 This is a front view of the structure of this application;

[0020] Figure 2 This is a side view of the structure of this application;

[0021] Figure 3 This is a structural side view schematic diagram from another perspective of this application.

[0022] Reference numerals: 1. Blade body; 11. Mounting hole; 12. Positioning groove; 2. Cross-blade; 21. Cutting edge; 22. Chamfer; 23. Inclined surface; 3. Chip groove. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0025] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0026] Reference Figure 1-3 A solid-hardened internal annular groove end mill includes: a cutter body 1 and several transverse cutting edges 2. The transverse cutting edges 2 are circumferentially distributed on the annular side of the cutter body 1, and a cutting edge 21 is provided on one side of the transverse cutting edge 2. The cutting edge 21 is inclined to the rotation axis of the cutter body 1, and the inclination direction of two adjacent cutting edges 21 is different. Thus, since the inclination direction of two adjacent cutting edges 21 is different, during cutting, the cutting edges 21 of two adjacent transverse cutting edges 2 are staggered and inclined to cut, which can effectively reduce the cutting resistance when the tool enters the workpiece, thereby increasing the stability of the tool during machining.

[0027] like Figure 1 As shown, in order to increase the sharpness of the cutting edge 21, a rake angle α is provided at the cutting edge 21, and the degree of the rake angle α is between 4 degrees and 6 degrees (e.g., 4 degrees, 5 degrees or 6 degrees).

[0028] like Figure 1 As shown, in order to smoothly discharge chips, chip grooves 3 are provided between two adjacent transverse cutting edges 2. The included angle between the two side walls of the chip groove 3 is between 75 degrees and 85 degrees (e.g., 75 degrees, 80 degrees or 85 degrees). In this way, while ensuring the strength of the cutting edge 21, the chip groove 3 with the largest possible opening angle is made, which fully guarantees the chip discharge space of the tool.

[0029] like Figure 1 As shown, the chisel edge 2 is provided with a clearance angle β, the degree of clearance angle β is between 10 degrees and 12 degrees (e.g., 10 degrees, 11 degrees or 12 degrees), the included angle between the extended surface of the connection between the chisel edge 2 and the tool body 1 and the cutting plane is γ, the degree of γ is between 16 degrees and 20 degrees (e.g., 16 degrees, 18 degrees or 20 degrees). Since the inner and outer sides of the chisel edge 2 are finally machined to different diameters, the angles of clearance angle β and included angle γ are different, so as to ensure the rigidity of the tool and avoid interference.

[0030] like Figure 2 and Figure 3 As shown, the transverse cutting edge 2 has a chamfer 22 on one side of the cutting edge 21. The chamfers 22 on two adjacent transverse cutting edges 2 are set in opposite directions. Thus, the chamfers 22 (the chamfer size is preferably C0.5) are staggered. Each cutting edge 21 has an inclined surface 23 on the side away from the chamfer 22. The inclined surface 23 extends from one side of the cutting edge 21 to the side away from the cutting edge 21. In this way, the chip removal effect can be effectively improved without affecting the machining dimensions.

[0031] like Figure 2As shown, the top and bottom surfaces of the transverse blade 2 are both inclined, and the inclination direction is from the side of the transverse blade 2 away from the blade body 1 to the side of the transverse blade 2 closer to the blade body 1 towards the inside of the transverse blade 2. The inclination angle ε is preferably between 1 degree and 3 degrees. In this application, the inclination angle ε is 1.5 degrees. In this way, a two-way clearance is adopted behind the cutting edge 21, which makes it less likely to squeeze iron chips during cutting and makes cutting easier.

[0032] like Figure 1 As shown, the tool body 1 is provided with a mounting hole 11 on the same axis, and a positioning groove 12 is provided on the circumferential side of the mounting hole 11, so as to facilitate the mounting of the tool body 1 on the machine tool.

[0033] In summary, since the inclination directions of two adjacent cutting edges 21 are different, during cutting, the cutting edges 21 of two adjacent transverse cutting edges 2 are staggered and inclined, which can effectively reduce the cutting resistance when the tool enters the workpiece, thereby increasing the stability of the tool during machining.

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A solid-hardened internal annular groove end mill, characterized in that, include: The blade (1) and several transverse blades (2) are arranged in a circular pattern on the circumferential side of the blade (1), and a cutting edge (21) is provided on one side of each transverse blade (2). The cutting edge (21) is inclined to the rotation axis of the blade body (1), and the inclination direction of two adjacent cutting edges (21) is different.

2. The solid-hardened inner annular groove milling cutter according to claim 1, characterized in that: The cutting edge (21) is provided with a front angle α, the degree of which is between 4 degrees and 6 degrees.

3. The solid-hardened inner annular groove milling cutter according to claim 1, characterized in that: A chip groove (3) is provided between each of the two adjacent transverse blades (2), and the angle between the two side walls of the chip groove (3) is between 75 degrees and 85 degrees.

4. A solid-hardened inner annular groove end mill according to claim 1, characterized in that: The transverse blade (2) is provided with a rear angle β, the degree of which is between 10 degrees and 12 degrees.

5. A hardened inner annular groove milling cutter according to claim 4, characterized in that: The angle between the extended surface of the connection between the transverse blade (2) and the blade body (1) and the cutting plane is γ, and the degree of γ is 16 to 20 degrees.

6. A hardened inner annular groove milling cutter according to claim 1, characterized in that: The transverse blade (2) has a chamfer (22) on one side of the cutting edge (21), and the chamfers (22) on two adjacent transverse blades (2) are set in opposite directions.

7. A hardened inner annular groove end mill according to claim 6, characterized in that: Each of the cutting edges (21) has an inclined surface (23) on the side away from the chamfer (22), the inclined surface (23) extending from one side of the cutting edge (21) toward the side away from the cutting edge (21).

8. A hardened inner annular groove milling cutter according to claim 1, characterized in that: The top and bottom surfaces of the transverse blade (2) are both inclined, and the inclination direction is from the side of the transverse blade (2) away from the blade body (1) towards the side of the transverse blade (2) closer to the blade body (1) towards the inside of the transverse blade (2).

9. A hardened inner annular groove milling cutter according to claim 1, characterized in that: The blade body (1) is provided with a mounting hole (11) on the same axis.

10. A solid-hardened inner annular groove end mill according to claim 9, characterized in that: The mounting hole (11) is provided with a positioning groove (12) on its circumferential side.

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