Combined-edge integral end mill

Abstract

The utility model discloses a combined blade integral end milling cutter, which comprises a cutter handle and a cutter head arranged at the front end of the cutter handle, the cutter head sequentially comprises a front cutting part, a connecting part and a rear cutting part from front to back, the diameter of the front cutting part is smaller than that of the rear cutting part, a plurality of first blades are arranged on the side wall of the front cutting part along the circumferential direction, and a plurality of second blades are arranged on the side wall of the connecting part. A plurality of second cutting edges matched with the first cutting edges in number are arranged on the side wall of the rear cutting part in the circumferential direction, an included angle is formed between the plane where the first cutting edges are located and the plane where the second cutting edges are located, and the degree of the included angle is 1 / 5-4 / 5 * (360 / cutting edge number). According to the utility model, the front and rear groups of cutting edges are combined through the connecting part, and the included angle is formed between the planes of the two cutting edges, so that each group of cutting edges has an independent front angle design, the size of the front angle is ensured, the front angle is prevented from tending to a negative front angle when the diameter of the cutting part is too small, the cutting resistance is reduced, and light and free cutting is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a combined-edge integral end milling cutter. Background Art

[0002] End mills are the most commonly used milling cutters on CNC machine tools, primarily used for plane milling, groove milling, step milling, and profile milling. Machine tools often use a combination of cutting blades of varying specifications. Commonly used combination tools can interfere with each other, and the rake angle varies significantly with diameter. Small diameters tend to have a negative rake angle, resulting in high cutting resistance and low machining efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a combined-edge integral end milling cutter for solving the above-mentioned problem.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A combined-edge integral end mill comprises a shank and a cutter head arranged at the front end of the shank, wherein the cutter head comprises, from front to back, a front cutting portion, a connecting portion, and a rear cutting portion, wherein the diameter of the front cutting portion is smaller than the diameter of the rear cutting portion, the side wall of the front cutting portion is circumferentially provided with a plurality of first cutting edges, and the side wall of the rear cutting portion is circumferentially provided with a plurality of second cutting edges matching the number of the first cutting edges, an angle being formed between the plane where the first cutting edges are located and the plane where the second cutting edges are located, and the degree of the angle is 1 / 5 to 4 / 5*(360 / number of cutting edges).

[0006] Preferably, a first chip groove is provided between two adjacent groups of the first cutting edges.

[0007] Preferably, a second chip groove is provided between two adjacent groups of the second cutting edges.

[0008] Preferably, the first blade and the second blade are both irregularly wavy.

[0009] Preferably, the tool handle and tool head are cast from one or more materials selected from the group consisting of high-speed steel, cemented carbide, CBN and PCD.

[0010] After adopting the above technical solution, the utility model has the following beneficial effects:

[0011] The utility model provides a combined-edge integral end mill, which combines two groups of cutting blades of different types, front and back, through a connecting portion, and an angle is formed between the planes where the two blades are located, so that each group of cutting blades has an independent rake angle design, ensuring the size of the rake angle, avoiding the rake angle tending to a negative rake angle when the diameter of the cutting portion is too small, reducing cutting resistance, and achieving light and free cutting; at the same time, it reduces the frequent tool changing process and effectively improves cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a side view of the utility model;

[0014] Figure 3 It is a top view of the utility model. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Example

[0017] See also Figures 1 to 3 The utility model discloses a combined-edge integral end mill, comprising a shank 1 and a cutter head 2 arranged at the front end of the shank 1. The cutter head 2 comprises a front cutting portion 21, a connecting portion 22 and a rear cutting portion 23 from front to rear. The diameter of the front cutting portion 21 is smaller than the diameter of the rear cutting portion 23. The side wall of the front cutting portion 21 is circumferentially provided with a plurality of first cutting edges 211. The side wall of the rear cutting portion 23 is circumferentially provided with a plurality of second cutting edges 231 that match the number of the first cutting edges 211. An angle is formed between the plane where the first cutting edges 211 are located and the plane where the second cutting edges 231 are located, and the degree of the angle is 1 / 5 to 4 / 5*(360 / number of cutting edges).

[0018] In this embodiment, the number of the first blade 211 and the second blade 231 are both three groups, and the angle between the plane where the first blade 211 is located and the plane where the second blade 231 is located is 60 degrees, which increases the front angle of the first blade 211 and the second blade 231, improves the sharpness of the blade, reduces cutting resistance, and has high surface quality.

[0019] A first chip groove 212 is provided between two adjacent groups of first blades 211 for chip removal. A second chip groove 232 is provided between two adjacent groups of second blades 231 for chip removal.

[0020] The first blade 211 and the second blade 231 are both irregularly wavy, and their specific shapes are adjusted and designed according to actual cutting.

[0021] The tool handle 1 and the tool head 2 are cast by one or more materials selected from high-speed steel, cemented carbide, CBN and PCD.

[0022] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A combined-edge integral end mill, characterized by: The utility model comprises a knife handle and a knife head arranged at the front end of the knife handle, wherein the knife head comprises a front cutting part, a connecting part and a rear cutting part from front to rear, the diameter of the front cutting part is smaller than the diameter of the rear cutting part, the side wall of the front cutting part is circumferentially provided with a plurality of first cutting edges, and the side wall of the rear cutting part is circumferentially provided with a plurality of second cutting edges whose number matches the number of the first cutting edges, an angle is formed between the plane where the first cutting edges are located and the plane where the second cutting edges are located, and the degree of the angle is 1 / 5 to 4 / 5*(360 / number of cutting edges).

2. A combined-edge integral end mill according to claim 1, characterized in that: A first chip groove is provided between two adjacent groups of the first cutting edges.

3. The combined-edge integral end mill according to claim 1, characterized in that: A second chip groove is provided between two adjacent groups of the second cutting edges.

4. The combined-edge integral end mill according to claim 1, characterized in that: The first blade and the second blade are both irregularly wavy.

5. The combined-edge integral end mill according to claim 1, characterized in that: The tool handle and the tool head are cast by using one or more materials selected from high-speed steel, cemented carbide, CBN and PCD.

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