Composite-edge end mill

Abstract

The utility model discloses a composite edge end mill which comprises a cutter handle and a cutter head arranged at the front end of the cutter handle, a plurality of groups of main chip grooves are formed in the side wall of the cutter head in the circumferential direction, main cutting edges which are obliquely arranged are distributed on the side walls of the main chip grooves, a plurality of groups of auxiliary chip grooves are formed between every two adjacent groups of main chip grooves in the axial direction, and the auxiliary chip grooves are communicated with the main cutting edges. Obliquely-arranged auxiliary cutting edges are distributed on the side walls of the auxiliary chip grooves, and the main cutting edges and the auxiliary cutting edges are all provided with rear angles. According to the end mill with the composite blade, the multiple sets of main chip grooves are adopted to form the parabolic groove, the chip containing capacity is high, the inclined cutting blades are distributed on the main chip grooves, the chip containing capacity and the heat dissipation capacity are improved, the fiber cutting capacity is high, and efficient machining of aramid fibers, carbon fibers and honeycomb materials is achieved.

Description

Technical Field

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

[0002] End mills are the most commonly used cutter type on CNC machine tools, primarily used for plane milling, groove milling, step milling, and contour milling on various materials. Fiber-based materials, due to their high strength and lightweight, are widely used in aerospace, military, and sporting goods industries. However, due to their high strength and hardness, fiber-based composite materials are prone to fuzzing and difficulty cutting during milling. Utility Model Content

[0003] The purpose of the utility model is to provide a composite edge end milling cutter for solving the above problems.

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

[0005] A composite edge end mill comprises a shank and a cutter head arranged at the front end of the shank, the side wall of the cutter head being circumferentially provided with several groups of main chip grooves, the side walls of the main chip grooves being distributed with inclined main cutting edges, the longitudinal section of the main chip grooves being an inverted U-shaped structure, multiple groups of the main chip grooves being combined to form spiral parabolic grooves, several groups of secondary chip grooves being axially provided between two adjacent groups of the main chip grooves, the side walls of the secondary chip grooves being distributed with inclined secondary cutting edges, and both the main cutting edges and the secondary cutting edges being provided with back angles.

[0006] Preferably, the helix angle of the main chip flute is 0.5-8°, and the depth of the main chip flute is (0.175-0.275)*the diameter of the cutter head.

[0007] Preferably, the width of the main cutting edge is (0.15-0.3)*the diameter of the cutter head.

[0008] Preferably, the helix angle of the secondary cutting edge is 30-50°.

[0009] Preferably, the front angle of the secondary cutting edge is 8-15°, and the back angle is 15-30°.

[0010] Preferably, the number of the main chip flutes is 4 groups.

[0011] Preferably, the types of the auxiliary chip flutes include right-handed auxiliary chip flutes, left-handed auxiliary chip flutes and left-handed and left-handed composite chip flutes.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects:

[0013] The utility model provides a composite edge end mill, which adopts multiple groups of main chip grooves to form parabolic grooves, has a strong chip holding capacity, and the inclined cutting edges are distributed on the main chip grooves to increase the chip holding and heat dissipation capacity, and has a strong fiber cutting ability, thereby realizing efficient processing of aramid fiber, carbon fiber and honeycomb materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is an end view of the parabolic trough of the utility model;

[0016] Figure 3 This is the first tooth view in the embodiment of the utility model;

[0017] Figure 4 This is the second tooth view in the embodiment of the utility model;

[0018] Figure 5 This is the third tooth view in the embodiment of the present utility model;

[0019] Figure 6 This is the fourth tooth view in the embodiment of the utility model;

[0020] Figure 7 This is a cross-sectional view of the secondary cutting edge in the embodiment of the present utility model;

[0021] Figure 8 This is a view of the left-handed heat dissipation teeth in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] 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.

[0023] Example

[0024] See also Figures 1 to 8 The utility model discloses a composite blade end mill, comprising a shank 1 and a cutter head 2 arranged at the front end of the shank 1, the side wall of the cutter head 2 is provided with several groups of main chip grooves 21 along the circumferential direction, the side walls of the main chip grooves 21 are distributed with inclined main cutting edges 22, the longitudinal section of the main chip grooves 21 is an inverted U-shaped structure, multiple groups of main chip grooves 21 cooperate to form a spiral parabolic groove 3, several groups of secondary chip grooves 23 are provided axially between two adjacent groups of main chip grooves 21, the side walls of the secondary chip grooves 23 are distributed with inclined secondary cutting edges 24, and both the main cutting edges 22 and the secondary cutting edges 24 are provided with back angles.

[0025] The types of the auxiliary chip flutes 23 include right-handed auxiliary chip flutes, left-handed auxiliary chip flutes, and left-handed and left-handed composite chip flutes.

[0026] The helix angle of the main chip flute 21 is 0.5-8°, and the depth of the main chip flute 21 is (0.175-0.275)*the diameter of the cutter head.

[0027] The width of the main cutting edge 22 is (0.15-0.3)*the diameter of the cutter head.

[0028] The helix angle of the secondary cutting edge 24 is 30 to 50°. The front angle of the secondary cutting edge 24 is 8 to 15°, and the back angle is 15 to 30°.

[0029] The main cutting edge 21 and the secondary cutting edge 23 are arranged from the first tooth to the last tooth, with the lag distance of each tooth being P (pitch) / Z (number of teeth), where the number of teeth is 4 to 6. Among them, the secondary cutting edges are arranged in this order according to P (pitch) = 0.15 to 0.3D (cutter head diameter), Pn (secondary cutting edge of the nth tooth). P1, P1, P2, P3, and P4 can be unequal or equal, and can be implemented in different design combinations to increase the chip breaking ability of the tool and meet different working conditions. Among them, the 24th tooth, the micro-blade structure composed of left-handed teeth can cut and also has the function of heat dissipation. In addition, the actual main cutting edge becomes a combination of f0 and inclined ΔP.

[0030] In this embodiment, a 4-edge composite edge end mill formed by 4 sets of main chip flutes is used, with specifications of D10x22x72xd10.

[0031] The main cutting edge width is 2.2 mm (f0 = 2.2 mm), the main chip flute has a helix angle of β0 = 1°, and a rake angle of γ0 = 10°. The main chip flute depth is 0.25 x cutter head diameter, and the main cutting edge tooth length (width) is 0.15 mm.

[0032] You can choose P1=P2=P3=P4=2mm, or you can choose P1=P3=2mm P2=P4=2.5mm

[0033] The distance between teeth is 0.5mm. β1 = 40° β2 = 35° β3 = 50° β4 = 40°, and the helix angle of the left-handed heat dissipation teeth is 40°.

[0034] 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 composite edge end mill, characterized by: It includes a tool holder and a tool head arranged at the front end of the tool holder, the side wall of the tool head is provided with several groups of main chip grooves along the circumferential direction, the side walls of the main chip grooves are distributed with inclined main cutting edges, the longitudinal section of the main chip grooves is an inverted U-shaped structure, multiple groups of main chip grooves cooperate to form spiral parabolic grooves, and several groups of secondary chip grooves are arranged axially between two adjacent groups of main chip grooves, the side walls of the secondary chip grooves are distributed with inclined secondary cutting edges, and both the main cutting edges and the secondary cutting edges are provided with back angles.

2. A composite edge end mill according to claim 1, characterized in that: The helix angle of the main chip removal groove is 0.5-8 degrees, and the depth of the main chip removal groove is (0.175-0.275)*the diameter of the cutter head.

3. The composite edge end mill according to claim 1, characterized in that: The width of the main cutting edge is (0.15-0.3)*the diameter of the cutter head.

4. The composite edge end mill according to claim 1, characterized in that: The helix angle of the secondary cutting edge is 30-50°.

5. The composite edge end mill according to claim 1, characterized in that: The front angle of the secondary cutting edge is 8-15°, and the back angle is 15-30°.

6. The composite edge end mill according to claim 1, characterized in that: The number of the main chip flutes is 4 groups.

7. The composite edge end mill according to claim 1, characterized in that: The types of the auxiliary chip flutes include right-handed auxiliary chip flutes, left-handed auxiliary chip flutes and left-handed and right-handed composite chip flutes.

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