Composite-edge end mill

Abstract

The invention 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, inclined main cutting edges are distributed on the side walls of the main chip grooves, and a plurality of groups of auxiliary chip grooves are formed between every two adjacent groups of main chip grooves in the axial direction. 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 composite-edge end mill, the multiple sets of main chip grooves are adopted to form the parabolic groove, the chip containing capacity is high, the inclined cutting edges are distributed on the main chip grooves, the chip containing and heat dissipation capacity is 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 invention 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 milling cutters on CNC machine tools, and are mainly used for plane milling, groove milling, step milling and profile milling of various materials. Among them, fiber materials have high strength and light weight, and are currently widely used in aerospace, military industry, sporting goods and other fields. However, due to their high strength and hardness, fiber composite materials are prone to fluffing and uncutting during the milling process. Summary of the invention

[0003] The object of the present invention is to provide a composite edge end mill for solving the above-mentioned problems.

[0004] To achieve the above object, the present invention 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 provided with a plurality of groups of main chip grooves along the circumferential direction, the side walls of the main chip grooves being provided with inclined main cutting edges, the longitudinal section of the main chip grooves being an inverted U-shaped structure, a plurality of groups of the main chip grooves being cooperated to form a spiral parabolic groove, a plurality of groups of secondary chip grooves being provided between two adjacent groups of the main chip grooves along the axial direction, the side walls of the secondary chip grooves being provided with inclined secondary cutting edges, and the main cutting edges and the secondary cutting edges being provided with back angles.

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

[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 right-handed composite chip flutes.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects:

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

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is an end view of the parabolic trough of the present invention;

[0016] Figure 3 This is a first tooth view in an embodiment of the present invention;

[0017] Figure 4 This is a second tooth view in an embodiment of the present invention;

[0018] Figure 5 This is a third tooth view in an embodiment of the present invention;

[0019] Figure 6 This is a fourth tooth view in an embodiment of the present invention;

[0020] Figure 7 A cross-sectional view of the secondary cutting edge in an embodiment of the present invention;

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

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 present invention discloses a composite edge end mill, comprising a shank 1 and a cutter head 2 arranged at the front end of the shank 1, a side wall of the cutter head 2 is circumferentially provided with a plurality of groups of main chip grooves 21, the side walls of the main chip grooves 21 are provided with inclined main cutting edges 22, the longitudinal section of the main chip grooves 21 is an inverted U-shaped structure, a plurality of groups of main chip grooves 21 cooperate to form a spiral parabolic groove 3, a plurality of groups of secondary chip grooves 23 are axially provided between two adjacent groups of main chip grooves 21, the side walls of the secondary chip grooves 23 are provided 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 right-handed composite chip flutes.

[0026] The helix angle of the main chip groove 21 is 0.5-8°, and the depth of the main chip groove 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, and the lag distance of each tooth is P (pitch) / Z (number of teeth), where the number of teeth is 4 to 6. Among them, the secondary cutting edges are arranged according to P (pitch) = 0.15 ~ 0.3D (cutter head diameter), Pn (secondary cutting edge of the nth tooth). P1, P1, P2, P3, P4 can be unequal or equal, and can be realized 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 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, and the specification is D10x22x72xd10.

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

[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 is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A composite edge end mill, characterized in that: It includes a tool handle and a tool head arranged at the front end of the tool handle, the side wall of the tool head is provided with a plurality of groups of main chip grooves along the circumferential direction, the side walls of the main chip grooves are provided with inclined main cutting edges, the longitudinal section of the main chip grooves is an inverted U-shaped structure, a plurality of groups of the main chip grooves cooperate to form a spiral parabolic groove, a plurality of groups of secondary chip grooves are provided between two adjacent groups of the main chip grooves along the axial direction, the side walls of the secondary chip grooves are provided with inclined secondary cutting edges, and the main cutting edges and the secondary cutting edges are both 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°, and the depth of the main chip removal groove is (0.175-0.275)*the diameter of the cutter head.

3. A 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. A composite edge end mill as claimed in claim 1, characterized in that: The helix angle of the secondary cutting edge is 30-50°.

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

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

7. A 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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