Milling cutter with staggered end teeth

Abstract

The invention discloses an end tooth staggered tooth milling cutter which comprises a cutter handle and a cutter head, and the cutter handle is used for clamping a cutter; the tool bit is arranged at one end of the tool handle and comprises end edges arranged at the end, away from the tool handle, of the tool bit, the end edges comprise the first end edges and the second end edges, the radial rake angle of each first end edge is a negative value, the radial rake angle of each second end edge is a positive value, and the first end edges and the second end edges are alternately arranged in the circumferential direction of the tool bit. According to the end-tooth staggered-tooth milling cutter disclosed by the embodiment of the invention, the two end blades with the positive radial front angle and the negative radial front angle are alternately arranged in the circumferential direction, so that two different cutting shearing motions from left to right and from right to left can be shown in the feeding direction of the cutter, a carbon fiber material can be cut off in time, the pulling force on a machined surface is reduced, and the machining efficiency is improved. The layering phenomenon of the workpiece surface is reduced, so that the processing surface quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tool technology, in particular to an end-tooth staggered-tooth milling cutter. Background Art

[0002] Carbon fiber composite materials have stacked carbon fiber layers inside, so they have relatively higher strength in the direction perpendicular to the layers of the carbon fiber composite materials, while the strength between the layers of the carbon fiber composite materials is relatively low; during the milling process of carbon fiber composite materials, due to the low interlayer strength of carbon fiber composite materials, they are prone to stratification under the action of cutting force, especially when processing inclined surfaces. The distribution of cutting force inside the material is more uneven, which will aggravate the stratification phenomenon and cause chips on the processed surface. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an end-tooth staggered-tooth milling cutter, which can effectively alleviate the delamination problem of carbon fiber composite materials during the bevel milling process.

[0004] According to an embodiment of the present invention, the end-tooth staggered-tooth milling cutter includes a shank and a cutter head, the shank is used for clamping the tool; the cutter head is arranged at one end of the shank, and includes an end blade arranged at an end of the cutter head away from the shank, the end blade includes a first end blade and a second end blade, the radial rake angle of the first end blade is a negative value, the radial rake angle of the second end blade is a positive value, and the first end blade and the second end blade are alternately arranged in the circumferential direction of the cutter head.

[0005] The end-tooth staggered-tooth milling cutter according to the embodiment of the present invention has at least the following beneficial effects: The end-tooth staggered-tooth milling cutter of this embodiment arranges two end cutting edges with positive radial rake angles and negative radial rake angles alternately in the circumferential direction, so that shearing movements in two different cutting directions, from left to right and from right to left, can be exhibited in the feed direction of the tool, so that the carbon fiber material can be cut off in time, thereby reducing the pulling force on the machined surface, and further reducing the stratification phenomenon on the workpiece surface, so as to improve the machined surface quality.

[0006] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, the radial rake angle of the first end edge is between -8° and -12°, and the radial rake angle of the second end edge is between 5° and 9°.

[0007] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, the axial rake angle of the end cutting edge is between 13° and 17°.

[0008] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, a back angle of the first end edge and a back angle of the second end edge are both between 10° and 14°.

[0009] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, the second clearance angle of the first end edge is between 26° and 30°, and the second clearance angle of the second end edge is between 43° and 47°.

[0010] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, a spiral circumferential blade is provided on the circumferential side of the cutter head, one end of the circumferential blade is connected to the end blade in a one-to-one correspondence, and a spiral groove is formed between the circumferential blades; a chip groove is provided between adjacent end blades, and the chip groove is connected to the spiral groove.

[0011] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, the cross-sections of the spiral groove and the chip groove are both arc-shaped.

[0012] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, a cutting edge is formed at one end of the chip groove away from the spiral groove.

[0013] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, the ends of the chip grooves away from the spiral grooves are connected to each other.

[0014] According to some embodiments of the end-tooth staggered-tooth milling cutter of the present invention, an end of the first end edge close to the center axis of the cutter head is provided with a chamfer.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a structural schematic diagram of an end-tooth staggered-tooth milling cutter according to an embodiment of the present invention; Figure 2 for Figure 1 The end-tooth staggered-tooth milling cutter is shown in a top view at a certain viewing angle; Figure 3 for Figure 2 The top view of the end-tooth staggered-tooth milling cutter shown in another perspective; Figure 4 for Figure 1 The schematic diagram of the synthetic path of the end edge of the end-tooth staggered-tooth milling cutter in the processing state is shown, and the arrow in the figure indicates the feed direction of the tool; Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the first end edge shown in ; Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure of the second end edge shown in .

[0017] Reference numerals: Tool handle 10; tool head 20; end edge 21; first end edge 211; second end edge 212; chip groove 22; cutting edge 221; peripheral edge 23; spiral groove 24; first end edge synthetic cutting path S1; second end edge synthetic cutting path S2. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] The following is the attached Figure 1 To Attachment Figure 6 , describing the end-tooth staggered-tooth milling cutter according to an embodiment of the present invention.

[0023] Reference Figure 1 According to some embodiments of the present invention, the end-tooth staggered-tooth milling cutter includes a tool handle 10 and a tool head 20; wherein the tool handle 10 is used for clamping the tool; and the tool head 20 is arranged at one end of the tool handle 10 and is used to complete the milling process of the material.

[0024] Reference Figures 1 to 3 The cutter head 20 is provided with an end blade 21 and a peripheral blade 23, wherein the end blade 21 is provided at one end of the cutter head 20 away from the cutter handle 10, and the peripheral blade 23 is provided on the peripheral side surface of the cutter head 20, and the peripheral blade 23 extends in a spiral direction, the end blade 21 and the peripheral blade 23 are provided in a one-to-one correspondence, and the end of the end blade 21 away from the center of the cutter head 20 is connected to the end of the peripheral blade 23 away from the cutter handle 10 to form a blade tip.

[0025] It can be understood that in some embodiments, the end edge 21 includes two types according to different extension directions. For the convenience of description below, the two end edges 21 are defined as a first end edge 211 and a second end edge 212, wherein the radial rake angle α1 of the first end edge 211 is a negative value, the radial rake angle α2 of the second end edge 212 is a positive value, and the first end edge 211 and the second end edge 212 are alternately arranged in the circumferential direction of the cutter head 20.

[0026] It should be understood that referring to Figure 4 By arranging the two end edges 21 with positive radial rake angles and negative radial rake angles alternately in the circumferential direction, it is possible to achieve two different cutting shearing movements from right to left and from left to right in the feed direction of the tool (for example Figure 4 The first end edge synthetic cutting path S1 and the second end edge synthetic cutting path S2 shown in the figure enable the carbon fiber material to be cut off in time, thereby reducing the pulling force on the machined surface, thereby reducing the delamination phenomenon on the workpiece surface, and improving the machined surface quality.

[0027] It is understood that in some of these embodiments, reference Figures 1 to 3 A spiral groove 24 is formed between adjacent peripheral edges 23, and a chip groove 22 is provided between adjacent end edges 21, and the chip groove 22 is connected to the spiral groove 24; the chip groove 22 can accommodate the chips generated during the cutting process of the end edge 21, and guide the chips to the spiral groove 24 for discharge. It should be understood that in one embodiment, referring to Figures 1 to 3 The chip groove 22 and the spiral groove 24 are both designed to be arc grooves to reduce the concentration of structural stress and the risk of tearing at stress points.

[0028] It is understood that in one embodiment, referring to Figure 1 A cutting edge 221 is formed at one end of the chip groove 22 away from the spiral groove 24, so that the chips generated during the machining process of the end edge 21 can be further cut off by the cutting edge 221, thereby alleviating the chip entanglement problem and further improving the machining quality.

[0029] It can be understood that in some embodiments, the ends of the chip grooves 22 away from the spiral grooves 24 are connected to each other to increase the fluidity of the chips and further increase the chip space. Figures 1 to 3, along the rotation direction of the tool, the chip grooves 22 adjacent to the second end edge 212 and located in front of the second end edge 212 are opposite and connected in the radial direction of the tool; while the chip grooves 22 adjacent to the first end edge 211 and located in front of the first end edge 211 are staggered from each other in the radial direction of the tool; and the chip groove 22 adjacent to the first end edge 211 and located in front of the first end edge 211, one end close to the center axis of the tool, is connected to the chip groove 22 adjacent to the second end edge 212 and located in front of the second end edge 212, so that each chip groove 22 can be connected to each other.

[0030] It is understandable that in some embodiments, the end of the first end edge 211 close to the central axis of the cutter head 20 is provided with a chamfer to reduce the risk of breakage of the end of the first end edge 211 close to the central axis of the cutter head 20 during the cutting process.

[0031] It can be understood that in some embodiments, the radial rake angle α1 of the first end edge 211 is between -8° and -12°, and the radial rake angle α2 of the second end edge 212 is between 5° and 9°. Figure 2 and Figure 3 In one embodiment, four end edges 21 are provided on the cutter head 20, of which two opposite and symmetrical end edges 21 have a radial rake angle of -10°, that is, two first end edges 211 have a radial rake angle α1 of -10°, and the other two opposite and symmetrical end edges 21 have a radial rake angle of 7°, that is, two second end edges 212 have a radial rake angle α2 of 7°.

[0032] It can be understood that in some embodiments, the axial rake angle of the end edge 21 is between 13° and 17°, so as to provide sufficient axial cutting force for the end teeth and enable the chips to flow to the chip groove 22, thereby improving the chip removal effect; for example, referring to Figure 5 and Figure 6 In one embodiment, specifically, the axial rake angle ɵ1 of the first end edge 211 and the axial rake angle ɵ2 of the second end edge 212 are both 15°.

[0033] It can be understood that in some embodiments, the first end edge 211 and the second end edge 212 both have a first back angle and a second back angle, so that they both have good air avoidance performance during milling; wherein, the first end edge 211 a back angle β1 and the second end edge 212 a back angle β2 are both between 10° and 14°, so that the end teeth have sufficient strength while also being able to reduce the friction between the back surface of the end edge 21 and the carbon fiber composite material, thereby reducing the generation of cutting heat and inhibiting thermal deformation of the resin. For example, referring to Figure 5 and Figure 6In one embodiment, specifically, a back angle β1 of the first end edge 211 and a back angle β2 of the second end edge 212 are both 12°.

[0034] It can be understood that in some embodiments, the clearance angle γ1 of the first end edge 211 is between 26° and 30°, and the clearance angle γ2 of the second end edge 212 is between 43° and 47°. By setting the clearance angle γ2 of the second end edge 212 to be greater than the clearance angle γ1 of the first end edge 211, the problem of inconsistency of clearance amount of the two end edges 21 caused by different radial rake angles can be alleviated. For example, in one embodiment, referring to Figure 5 and Figure 6 The two clearance angles γ1 of the first end edge 211 are 28°, and the two clearance angles γ2 of the first end edge 211 are 45°.

[0035] It can be understood that in some embodiments, the core diameter ratio is between 53% and 57%, and the helix angle of the peripheral edge 23 and the spiral groove 24 is between 18° and 22°, so as to use a smaller spiral to ensure the strength of the end edge 21 and the peripheral edge 23. For example, in one embodiment, the core diameter ratio is 55%, and the helix angle of the peripheral edge 23 and the spiral groove 24 is 20°.

[0036] It can be understood that, in some embodiments, the first end edge 211 and the second end edge 212 both have a taper angle of 5°, and are used to machine a 5° chamfer on the carbon fiber composite material.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A type of end-tooth staggered-tooth milling cutter, It is characterized in that include: Tool handle, used for clamping the tool; A cutter head is arranged at one end of the cutter handle and includes an end blade arranged at an end of the cutter head away from the cutter handle, the end blade includes a first end blade and a second end blade, the radial rake angle of the first end blade is a negative value, the radial rake angle of the second end blade is a positive value, and the first end blade and the second end blade are alternately arranged in the circumferential direction of the cutter head.

2. The end-tooth staggered-tooth milling cutter according to claim 1, It is characterized in that The radial rake angle of the first end edge is between -8° and -12°, and the radial rake angle of the second end edge is between 5° and 9°.

3. The end-tooth staggered-tooth milling cutter according to claim 1, It is characterized in that The axial rake angle of the end cutting edge is between 13° and 17°.

4. The end-tooth staggered-tooth milling cutter according to claim 1, It is characterized in that A back angle of the first end edge and a back angle of the second end edge are both between 10° and 14°.

5. The end-tooth staggered-tooth milling cutter according to claim 1, It is characterized in that The two clearance angles of the first end edge are between 26° and 30°, and the two clearance angles of the second end edge are between 43° and 47°.

6. The end-tooth staggered-tooth milling cutter according to any one of claims 1 to 5, It is characterized in that A spiral circumferential blade is arranged on the circumferential side of the cutter head, one end of the circumferential blade is connected to the end blade in a one-to-one correspondence, and a spiral groove is formed between adjacent circumferential blades; a chip groove is arranged between adjacent end blades, and the chip groove is connected to the spiral groove.

7. The end-tooth staggered-tooth milling cutter according to claim 6, It is characterized in that The spiral groove and the chip groove are both arc grooves.

8. The end-tooth staggered-tooth milling cutter according to claim 6, It is characterized in that A cutting edge is formed at one end of the chip groove away from the spiral groove.

9. The end-tooth staggered-tooth milling cutter according to claim 6, It is characterized in that The ends of the chip grooves away from the spiral groove are connected to each other.

10. The end-tooth staggered-tooth milling cutter according to any one of claims 1 to 5, It is characterized in that One end of the first end blade close to the center axis of the cutter head is provided with a chamfer.

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