Composite material flat bottom milling cutter

Abstract

The application discloses a processing composite material flat bottom milling cutter, which comprises a handle and a cutter body. The cutter body is connected with the handle. The outer periphery of the cutter body is provided with a plurality of helical peripheral edges. The front end of the cutter body is provided with a bottom edge connected with the peripheral edges. The plurality of bottom edges are divided into long teeth and short teeth. The peripheral edge connected with the long teeth is provided with a shock-absorbing edge. The milling cutter has a shock-absorbing effect due to the shock-absorbing edge arranged on the long teeth, the cutting force and the edge strength are improved, and the stability is good during processing of complex materials.

Description

Technical Field

[0001] This invention relates to the field of milling products, and in particular to a flat end mill for machining composite materials. Background Technology

[0002] Currently, 3C products are made of a variety of materials, such as steel, aluminum, and titanium. When milling composite materials with solid carbide tools, problems such as poor product appearance, easy chipping of the tool edge, and low tool life are often encountered, resulting in low tool performance and high processing costs. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a flat end mill for machining composite materials, which helps improve product appearance defects and increase tool life.

[0004] According to an embodiment of the present invention, a flat end mill for machining composite materials includes: a shank and a cutter body; the cutter body is connected to the shank, and the outer periphery of the cutter body is provided with a plurality of spiral peripheral cutting edges, and the front end of the cutter body is provided with a bottom cutting edge corresponding to and connected to the peripheral cutting edges; wherein, the plurality of bottom cutting edges are divided into long teeth and short teeth, and the peripheral cutting edge connected to the long teeth is provided with a shock-absorbing edge.

[0005] The flat-bottom end mill for machining composite materials according to embodiments of the present invention has at least the following beneficial effects: by providing a damping edge on the long teeth, the cutting edge of the end mill has a damping effect, which improves the cutting force and the strength of the cutting edge, and provides better stability when machining complex materials.

[0006] According to some embodiments of the present invention, the width of the damping blade is A1, where A1 is 0.04 to 0.06 mm, and the damping blade is provided with a damping arc rear angle, where the damping arc rear angle is A2, where A2 is 3° to 5°.

[0007] According to some embodiments of the present invention, the peripheral cutting edge is provided with a peripheral cutting edge front face and a peripheral cutting edge rear face, and in two adjacent peripheral cutting edges, the peripheral cutting edge front face and the peripheral cutting edge rear face form a chip removal groove; the peripheral cutting edge rear face is provided with a peripheral cutting edge first clearance angle and a peripheral cutting edge second clearance angle, and the shock-absorbing edge is disposed between the peripheral cutting edge first clearance angle and the peripheral cutting edge front face that are in contact with the long tooth.

[0008] According to some embodiments of the present invention, the first rear angle of the circumferential blade is a rounded rear angle, and the first rear angle of the circumferential blade is B1, where B1 is 9° to 11°; the second rear angle of the circumferential blade is a planar rear angle, and the second rear angle of the circumferential blade is B2, where B2 is 31° to 33°.

[0009] According to some embodiments of the present invention, the peripheral cutting face that contacts the long tooth is provided with a long tooth groove rake angle, the long tooth groove rake angle being B1, B1 being 9° to 11°; the peripheral cutting face that contacts the short tooth is provided with a short tooth groove first rake angle and a short tooth groove second rake angle, the short tooth groove first rake angle being disposed away from the axis of the tool body, and the short tooth groove second rake angle being disposed close to the axis of the tool body; the short tooth groove first rake angle being C2, C2 being -1° to 1°, and the short tooth groove second rake angle being B1, B1 being 9° to 11°.

[0010] According to some embodiments of the present invention, the helix angle of the peripheral cutting edge that contacts the long tooth is D1, where D1 is 37° to 39°, and the helix angle of the peripheral cutting edge that contacts the short tooth is D2, where D2 is 40° to 42°.

[0011] According to some embodiments of the present invention, the number of the four circumferential cutting edges is four, and the four circumferential cutting edges are designed to be unequally divided in the circumference. The four circumferential cutting edges are sequentially divided into a first circumferential cutting edge, a second circumferential cutting edge, a third circumferential cutting edge, and a fourth circumferential cutting edge. The included angle between the first circumferential cutting edge and the second circumferential cutting edge is 95°, the included angle between the second circumferential cutting edge and the third circumferential cutting edge is 85°, the included angle between the third circumferential cutting edge and the fourth circumferential cutting edge is 95°, and the included angle between the fourth circumferential cutting edge and the first circumferential cutting edge is 85°.

[0012] According to some embodiments of the present invention, a chip-collecting groove is provided between two adjacent bottom cutting edges, and the chip-collecting groove is connected to the chip-removing groove; wherein, the chip-collecting groove is provided with an R-angle so that two adjacent chip-collecting grooves can be connected through the R-angle.

[0013] According to some embodiments of the present invention, the bottom cutting edge is provided with an end tooth rake angle, an end face butterfly angle, an end tooth first clearance angle, and an end tooth second clearance angle. The end tooth rake angle is E1, where E1 is 2° to 4°. The end face butterfly angle is E2, where E2 is 1° to 3°. The end tooth first clearance angle is E3, where E3 is 7° to 9°. The end tooth second clearance angle is E4, where E4 is 15° to 17°.

[0014] According to some embodiments of the present invention, the side of the bottom cutting edge near the chip groove is the bottom cutting edge rake face, and the bottom cutting edge rake face is provided with a reinforcing surface that connects with the tip of the bottom cutting edge.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a first-view structural schematic diagram of a flat-bottom end mill according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the second-view structure of the flat-bottom milling cutter according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the end face structure of a flat-bottomed milling cutter according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the long tooth groove rake angle structure of a flat end mill according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the first rake angle and the second rake angle of the short tooth groove of the flat end mill according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the bottom cutting edge structure of a flat end mill according to an embodiment of the present invention;

[0023] Figure label:

[0024] Handle 10, blade 20, circumferential cutting edge 30, front face of circumferential cutting edge 31, front angle of long tooth groove 311, first front angle of short tooth groove 312, second front angle of short tooth groove 313, rear face of circumferential cutting edge 32, first rear angle of circumferential cutting edge 321, second rear angle of circumferential cutting edge 322;

[0025] Bottom cutting edge 40, long tooth 41, short tooth 42, chip groove 43, radius 431.

[0026] End tooth rake angle 44, end tooth first clearance angle 45, end tooth second clearance angle 46, reinforcing surface 47;

[0027] Shock-absorbing blade 50, shock-absorbing arc rear angle 51, chip removal groove 60. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0031] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0032] like Figures 1 to 4 As shown, the flat end mill for machining composite materials according to an embodiment of the present invention includes: a shank 10 and a cutter body 20; the cutter body 20 is connected to the shank 10, and the outer periphery of the cutter body 20 is provided with a plurality of spiral peripheral cutting edges 30, and the front end of the cutter body 20 is provided with a bottom cutting edge 40 corresponding to and connected to the peripheral cutting edges 30; wherein, the plurality of bottom cutting edges 40 are divided into long teeth 41 and short teeth 42, and the peripheral cutting edges 30 connected to the long teeth 41 are provided with a damping edge 50.

[0033] According to an embodiment of the present invention, a flat end mill for machining composite materials has a damping edge 50 on the long tooth 41, which makes the cutting edge of the end mill have a damping effect, improves the cutting force and the cutting edge strength, and has good stability when machining complex materials.

[0034] like Figures 1 to 4 As shown, in some embodiments of the present invention, the width of the damping blade 50 is A1, where A1 is 0.04 to 0.06 mm, and the damping blade 50 is provided with a damping arc rear angle 51, where the damping arc rear angle 51 is A2, where A2 is 3° to 5°.

[0035] It is understandable that, such as Figures 1 to 5 As shown, in some embodiments of the present invention, the peripheral cutting edge 30 is provided with a peripheral cutting edge front face 31 and a peripheral cutting edge rear face 32. In two adjacent peripheral cutting edges 30, the peripheral cutting edge front face 31 and the peripheral cutting edge rear face 32 form a chip removal groove 60. The peripheral cutting edge rear face 32 is provided with a peripheral cutting edge first clearance angle 321 and a peripheral cutting edge second clearance angle 322. The shock-absorbing edge 50 is disposed between the peripheral cutting edge first clearance angle 321 and the peripheral cutting edge front face 31 that are in contact with the long tooth 41.

[0036] In some embodiments of the present invention, the first rear angle 321 of the circumferential blade is an arc rear angle, and the first rear angle 321 of the circumferential blade is B1, where B1 is 9° to 11°; the second rear angle 322 of the circumferential blade is a planar rear angle, and the second rear angle 322 of the circumferential blade is B2, where B2 is 31° to 33°.

[0037] like Figures 1 to 5As shown, in some embodiments of the present invention, the peripheral cutting face 31 that is in contact with the long tooth 41 is provided with a long tooth groove rake angle 311, the long tooth groove rake angle 311 is B1, B1 is 9° to 11°, the peripheral cutting face 31 that is in contact with the short tooth 42 is provided with a short tooth groove first rake angle 312 and a short tooth groove second rake angle 313, the short tooth groove first rake angle 312 is located away from the axis of the cutter body 20, and the short tooth 42 second rake angle is located close to the axis of the cutter body 20; the short tooth groove first rake angle 312 is C2, C2 is -1° to 1°, and the short tooth groove second rake angle 313 is B1, B1 is 9° to 11°. With the above structure, the long tooth groove rake angle 311 adopts a relatively large B1, which is 9° to 11°, and is paired with the damping arc clearance angle 51, so that the cutting edge has a damping effect, improving the cutting force and cutting edge strength, and has good stability when machining complex materials. The short tooth groove first rake angle 312 and short tooth groove second rake angle 313 adopt C2, which is -1° to 1° and B1, which is 9° to 11° respectively. This combination can change the chip removal direction, so that the chips do not get tangled in the tool and fly out smoothly. Furthermore, the short tooth groove first rake angle 312 and short tooth groove second rake angle 313 are paired with the peripheral cutting edge first clearance angle 321, which further improves the chip removal performance of the cutting edge, increases the cutting edge strength, and improves the stability when machining complex materials.

[0038] like Figures 1 to 3 As shown, in some embodiments of the present invention, the helix angle of the peripheral cutting edge 30 that engages with the long tooth 41 is D1, where D1 is 37° to 39°, and the helix angle of the peripheral cutting edge 30 that engages with the short tooth 42 is D2, where D2 is 40° to 42°. There are four peripheral cutting edges 30, which are unequally divided circumferentially. The four peripheral cutting edges 40 are sequentially divided into a first peripheral cutting edge, a second peripheral cutting edge, a third peripheral cutting edge, and a fourth peripheral cutting edge. The included angle between the first and second peripheral cutting edges is 95°, the included angle between the second and third peripheral cutting edges is 85°, the included angle between the third and fourth peripheral cutting edges is 95°, and the included angle between the fourth and first peripheral cutting edges is 85°. Through the above arrangement, the tool can obtain chip removal grooves 60 with unequal helical divisions. The groove shape of the chip removal grooves 60 has the advantages of large chip space, high tool rigidity, and vibration resistance, allowing chips to be discharged very smoothly during machining.

[0039] It should be noted that, understandably, in two adjacent peripheral cutting edges 30, the circumferential cutting edge face 31 of one peripheral cutting edge 30 and the circumferential cutting edge face 32 of the other peripheral cutting edge 30 are respectively the two sides of the chip removal groove 60. Both the peripheral cutting edge 30 and the chip removal groove 60 are polished with a D10 grinding wheel and ground with a 70° 1V1 grinding wheel to ensure the smoothness of the tool surface, allowing the chips to be discharged more smoothly and not easily stick to the cutting edge.

[0040] like Figures 1 to 3As shown, in some embodiments of the present invention, a chip-receiving groove 43 is provided between two adjacent bottom cutting edges 40, and the chip-receiving groove 43 is connected to the chip removal groove 60; wherein, the chip-receiving groove 43 is provided with an R-angle 431 so that two adjacent chip-receiving grooves 43 can be connected by the R-angle 431. With the above structure, the R-angle 431 transition design provides a large chip-receiving space for the chip-receiving groove 43 and strong transition rigidity, avoiding tooth breakage due to resistance during tool machining.

[0041] like Figure 1 , Figure 3 as well as Figure 6 As shown, in some embodiments of the present invention, the bottom cutting edge 40 is provided with an end tooth rake angle 44, an end face butterfly angle, an end tooth first clearance angle 45, and an end tooth second clearance angle 46. The end tooth rake angle 44 is E1, where E1 is 2° to 4°, the end face butterfly angle is E2, where E2 is 1° to 3° (not shown in the figure), the end tooth first clearance angle 45 is E3, where E3 is 7° to 9°, and the end tooth second clearance angle 46 is E4, where E4 is 15° to 17°.

[0042] like Figure 1 As shown, in some embodiments of the present invention, the side of the bottom cutting edge 40 near the chip groove 43 is the bottom cutting edge rake face, and a reinforcing surface 47 is provided on the bottom cutting edge rake face to connect with the tip of the bottom cutting edge 40, so as to avoid the chipping of the tip of the cutting edge and affect the life of the tool.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A flat-bottom end mill for machining composite materials, characterized in that, include: Handle (10); The blade (20) is connected to the handle (10). The outer periphery of the blade (20) is provided with a plurality of spiral-shaped peripheral blades (30), and the front end of the blade (20) is provided with a bottom blade (40) that is connected to the peripheral blades (30). Among them, the multiple bottom cutting edges (40) are divided into long teeth (41) and short teeth (42), and the peripheral cutting edge (30) connected to the long teeth (41) is provided with a shock-absorbing cutting edge (50). The peripheral cutting edge (30) is provided with a front cutting edge (31) and a back cutting edge (32). The peripheral cutting edge back face (32) is provided with a first peripheral cutting edge back angle (321) and a second peripheral cutting edge back angle (322). The damping edge (50) is provided between the first peripheral cutting edge back angle (321) and the peripheral cutting edge front face (31) that are in contact with the long tooth (41). The damping edge (50) is provided with a damping arc back angle (51). The peripheral cutting edge front face (31) that is in contact with the long tooth (41) is provided with a long tooth groove front angle (311). The width of the damping edge (50) is A1, where A1 is 0.04 to 0.06 mm. The long tooth groove front angle (311) is C1, where C1 is 9° to 11°. The damping arc back angle (51) is A2, where A2 is 3° to 5°. This is so that the long tooth groove front angle (311) and the damping arc back angle (51) work together to achieve a damping effect. The number of the four circumferential blades (30) is four, and the four circumferential blades (30) are designed with unequal division in the circumference. The peripheral cutting face (31) that is in contact with the short tooth (42) is provided with a first rake angle (312) and a second rake angle (313) of the short tooth groove. The first rake angle (312) of the short tooth groove is located away from the axis of the cutter body (20), and the second rake angle (313) of the short tooth groove is located close to the axis of the cutter body (20). The first rake angle (312) of the short tooth groove is C2, where C2 is -1° to 1°, and the second rake angle (313) of the short tooth groove is C3, where C3 is 9° to 11°.

2. The flat-bottom end mill for machining composite materials according to claim 1, characterized in that, In two adjacent peripheral cutting edges (30), the front cutting edge (31) and the back cutting edge (32) form a chip removal groove (60).

3. The flat-bottom end mill for machining composite materials according to claim 2, characterized in that, The first rear angle (321) of the peripheral blade is a rounded rear angle, and the first rear angle (321) of the peripheral blade is B1, where B1 is 9° to 11°; The second rear angle (322) of the peripheral blade is a planar rear angle, and the second rear angle (322) of the peripheral blade is B2, where B2 is 31° to 33°.

4. The flat-bottom end mill for machining composite materials according to claim 1, characterized in that, The helix angle of the peripheral blade (30) that connects with the long tooth (41) is D1, where D1 is 37° to 39°, and the helix angle of the peripheral blade (30) that connects with the short tooth (42) is D2, where D2 is 40° to 42°.

5. The flat-bottom end mill for machining composite materials according to claim 1, characterized in that, The number of the four circumferential blades (30) is four, and the four circumferential blades (30) are designed to be unequally divided in the circumference. The four circumferential blades are divided into the first circumferential blade, the second circumferential blade, the third circumferential blade and the fourth circumferential blade in sequence. The included angle between the first and second circumferential cutting edges is 95°, the included angle between the second and third circumferential cutting edges is 85°, the included angle between the third and fourth circumferential cutting edges is 95°, and the included angle between the fourth and first circumferential cutting edges is 85°.

6. The flat-bottom end mill for machining composite materials according to claim 2, characterized in that, A chip-collecting groove (43) is provided between two adjacent bottom cutting edges (40), and the chip-collecting groove (43) is connected to the chip-removing groove (60); The chip groove (43) is provided with an R-angle (431) so that two adjacent chip grooves (43) can be connected through the R-angle (431).

7. The flat-bottom end mill for machining composite materials according to claim 6, characterized in that, The bottom cutting edge (40) is provided with an end tooth front angle (44), an end face butterfly angle, an end tooth first rear angle (45), and an end tooth second rear angle (46). The end tooth front angle (44) is E1, where E1 is 2° to 4°. The end face butterfly angle is E2, where E2 is 1° to 3°. The end tooth first rear angle (45) is E3, where E3 is 7° to 9°. The end tooth second rear angle (46) is E4, where E4 is 15° to 17°.

8. The flat-bottom end mill for machining composite materials according to claim 6, characterized in that, The side of the bottom cutting edge (40) near the chip groove (43) is the front cutting edge face, and a reinforcing surface (47) is provided on the front cutting edge face that is in contact with the tip of the bottom cutting edge (40).

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