Aramid honeycomb cutting device

Abstract

The invention provides an aramid fiber honeycomb cutting device which comprises a machine tool used for bearing an aramid fiber honeycomb, a base plate capable of moving in multiple directions is arranged on the machine tool, a cutting tool moving synchronously with the base plate is vertically arranged at the bottom of the base plate, the aramid fiber honeycomb cutting device further comprises a floating pressing mechanism and a cooling assembly, and the floating pressing mechanism moves along with the cutting tool. The pressing assembly is used for pressing the to-be-cut part of the aramid fiber honeycomb located under the cutting tool in advance before cutting, and the cooling assembly is used for cooling a tool bit of the cutting tool during cutting. According to the aramid fiber honeycomb cutting device, pre-pressure can be applied to the surface of a honeycomb before the tool bit is used for cutting, the freedom degree of a hole grid wall is limited, the problems of cutter relieving and collapse of a thin-wall structure are effectively solved, the cutting size precision is remarkably improved, cutting heat can be reduced during cutting, and the service life of the tool bit is prolonged.

Description

Technical Field

[0001] This invention relates to the field of composite material processing technology, specifically to an aramid honeycomb cutting device. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Aramid honeycomb fibers are widely used in sandwich structures in aerospace, rail transportation, and other fields due to their lightweight and high strength. However, because aramid fibers have extremely high toughness and the honeycomb lattice structure has thin walls (typically only 0.05-0.1 mm), the following problems exist during machining: (1) The honeycomb core material has extremely poor rigidity in the planar direction. Traditional milling or ordinary cutting can easily cause the cell walls to collapse under stress, which seriously affects the height accuracy and bonding performance of the core material. (2) Ultrasonic cutters generate heat under high-frequency vibration. If the heat cannot be dissipated in time, the honeycomb impregnated resin will soften and stick to the cutter, which will not only affect the cutting quality but may also damage the cutter head. To address these issues, the present invention provides an aramid honeycomb cutting device. Summary of the Invention

[0004] The main objective of this invention is to provide an aramid honeycomb cutting device capable of locally pressing the cutting area and simultaneously cooling the cutting head.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: an aramid honeycomb cutting device includes a machine tool for carrying aramid honeycombs, a base plate that is movably mounted on the machine tool in multiple directions, a cutting tool that moves synchronously with the base plate and is vertically mounted on the bottom of the base plate, and a floating pressing mechanism and a cooling component. The floating pressing mechanism moves with the cutting tool and is used to pre-press the part of the aramid honeycomb to be cut located directly below the cutting tool before cutting. The cooling component is used to cool the cutting head of the cutting tool during cutting.

[0006] Furthermore, the floating clamping mechanism includes a pressing shell covering the outside of the cutting tool. The pressing shell can move axially relative to the cutting tool. The pressing shell is uniformly and synchronously provided with multiple radially extending support arms along the circumference. The bottom side of the substrate and the top side of the support arms are elastically connected. The bottom side of the pressing shell has a receiving cavity that can accommodate the cutting tool. The bottom side of the cutting head is higher than the bottom opening of the receiving cavity in the vertical direction. When the pressing shell moves down to press the aramid honeycomb, it forces the pressing shell to move axially upward relative to the cutting tool, so that the cutting head can touch and press the part to be cut of the aramid honeycomb.

[0007] Furthermore, the bottom of the support arm is provided with several casters, the bottom side of which is flush with the bottom side of the press-fit housing.

[0008] Furthermore, the bottom of the substrate is provided with a first cylinder parallel to the cutting tool, a vertical rod is slidably inserted into the bottom of the first cylinder, the bottom of the vertical rod is fixed to the top of the support arm, a baffle is provided inside the first cylinder, and a spring is provided between the top of the vertical rod and the bottom of the baffle.

[0009] Furthermore, a screw parallel to the axial direction of the cutting tool is slidably inserted on the substrate. The bottom end of the screw extends into the first cylinder and is fixed to the top side of the baffle. A second cylinder concentric with the screw is rotatably disposed on the top of the substrate, and the bottom end of the second cylinder is threaded onto the top end of the screw.

[0010] Furthermore, the top of the substrate is provided with a first slider that is concentric with the screw and forms an annular shape, and the bottom side of the second cylinder is provided with a first groove that cooperates with the first slider.

[0011] Furthermore, the top side of the substrate is rotatably provided with a ring concentric with the cutting tool, a second gear is inserted and fixed on the inner periphery of the ring, and a first gear that cooperates with the second gear is sleeved and fixed on the outer periphery of the second cylinder.

[0012] Furthermore, the top of the substrate is provided with a second slider that is concentric with the cutting tool and forms an annular shape, and a second groove that cooperates with the second slider is provided on the bottom side of the annular body.

[0013] Furthermore, the top of the substrate is provided with a vertical plate, on which a locking rod is threadedly inserted, and a locking groove is provided on the outer periphery of the ring to engage with the locking rod.

[0014] Furthermore, the cooling component includes an air inlet pipe disposed on the press-fit housing, a second air chamber circumferentially opened on the inner side of the press-fit housing and communicating with the air outlet end of the air inlet pipe, a plurality of axially extending first air chambers uniformly opened on the inner side of the press-fit housing along the circumferential direction, the air inlet end of the first air chamber communicating with the air outlet end of the second air chamber, and an air outlet hole pointing towards the blade tip opened obliquely on the cavity wall of the receiving cavity, the air inlet end of the air outlet hole communicating with the air outlet end of the first air chamber.

[0015] The beneficial effects of this invention are reflected in: The aramid honeycomb cutting device of the present invention can apply pre-pressure to the honeycomb surface before the cutter head cuts, which restricts the degree of freedom of the cell wall, effectively solves the problem of blade deflection and collapse in thin-walled structures, significantly improves the cutting dimension accuracy, and can reduce cutting heat during cutting and extend the service life of the cutter head. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 for Figure 1 A schematic diagram of the structure of the substrate, cutting tool, and floating clamping mechanism, etc. Figure 3 for Figure 2 A top-view structural diagram; Figure 4 for Figure 2 A schematic diagram of a partial cross-sectional structure; Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6 for Figure 4 A schematic diagram of a partial cross-sectional structure of the cutting head during cutting.

[0017] Explanation of reference numerals in the attached figures: 1. Machine tool; 3. Base plate; 4. Cutting tool; 401. Cutting head; 5. Press-fit housing; 501. Receiving cavity; 6. Support arm; 7. Caster wheel; 8. Upright pole; 9. First cylinder; 10. Second cylinder; 11. Screw; 12. Baffle; 13. First slide groove; 14. First slider; 15. Ring body; 16. Second slide groove; 17. Second slider; 18. First gear; 19. Second gear; 20. Upright plate; 21. Locking rod; 22. Locking groove; 23. Air outlet; 24. First air chamber; 25. Second air chamber; 26. Air inlet pipe; 27. Cutting part. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] Please combine Figures 1 to 6 Aramid honeycomb cutting device includes a machine tool 1 for carrying aramid honeycomb, a base plate 3 that can move in multiple directions on the machine tool 1, a cutting tool 4 that moves synchronously with the base plate 3 and is vertically arranged at the bottom of the base plate 3, and also includes a floating pressing mechanism and a cooling component. The floating pressing mechanism moves with the cutting tool 4 and is used to pre-press the part of the aramid honeycomb to be cut located directly below the cutting tool 4 before cutting. The cooling component is used to cool the cutting head 401 of the cutting tool 4 during cutting.

[0020] In practice, the aramid honeycomb material to be cut is first placed on top of the machine tool 1. The drive base plate 3 carries the cutting tool 4 and moves it synchronously down to the surface of the aramid honeycomb. With the use of the floating clamping mechanism, the surface of the aramid honeycomb located directly below the cutting tool 4 can be pre-clamped before cutting. Then, the drive base plate 3 moves along a predetermined horizontal direction to complete the cutting operation of the aramid honeycomb. During the cutting process, the use of a cooling component can reduce the temperature of the cutting head 401, thereby reducing wear and tear on the cutting head 401 and increasing its service life.

[0021] The advantage of this design is that pre-pressure can be applied to the honeycomb surface before the cutter head 401 cuts, which restricts the degree of freedom of the cell wall, effectively solves the problem of cutter deflection and collapse in thin-walled structures, significantly improves the cutting dimensional accuracy, reduces cutting heat during cutting, and extends the service life of the cutter head 401.

[0022] It should be added that the machine tool 1 in this embodiment has a three-axis (x, y, z axis) travel mechanism for adjusting the working position of the cutting tool 4 on the substrate 3 relative to the aramid honeycomb cutting area. The cutting tool 4 is an ultrasonic tool, which mainly includes an ultrasonic transducer, an amplitude transformer, and a cutter head 401 (usually a straight cutter or a disc cutter) installed at the end of the amplitude transformer, for performing high-frequency vibration cutting. Since the three-axis travel mechanism of the machine tool 1 and the ultrasonic tool are existing technologies, this embodiment will not elaborate on them further.

[0023] In one embodiment, the floating clamping mechanism includes a pressing shell 5 covering the outside of the cutting tool 4. The pressing shell 5 is axially movable relative to the cutting tool 4. The pressing shell 5 is provided with a plurality of radially extending support arms 6 evenly and synchronously arranged in the circumferential direction. The bottom side of the base plate 3 is elastically connected to the top side of the support arm 6. The bottom side of the pressing shell 5 has a receiving cavity 501 that can accommodate the cutting tool 4. The bottom side of the cutting head 401 is higher than the bottom cavity opening of the receiving cavity 501 in the vertical direction.

[0024] Thus, when the pressing shell 5 moves down to press the aramid honeycomb, it forces the pressing shell 5 to move axially upward relative to the cutting tool 4, so that the cutting head 401 can press and cut the part of the aramid honeycomb to be cut, so as to perform the cutting operation on the aramid honeycomb in a predetermined horizontal direction under the drive of the substrate 3.

[0025] In one embodiment, the bottom of the support arm 6 is provided with a plurality of casters 7, the bottom side of the casters 7 being flush with the bottom side of the press-fit housing 5.

[0026] Thus, during the cutting process, the bottom side of the universal wheel 7 and the bottom side of the pressing shell 5 contact the honeycomb surface before the cutter head 401, and use elastic force to press the honeycomb hole walls around the cutter head 401 downward, so that the hole walls in the area to be cut are in a "tensioned" state, improving their local rigidity and preventing collapse.

[0027] In one embodiment, a first cylindrical body 9 parallel to the cutting tool 4 is provided at the bottom of the substrate 3, and a vertical rod 8 is slidably inserted at the bottom of the first cylindrical body 9. The bottom of the vertical rod 8 is fixed to the top of the support arm 6. A baffle 12 is provided on the inner side of the first cylindrical body 9, and a spring is provided between the top of the vertical rod 8 and the bottom of the baffle 12.

[0028] Thus, by moving the upright 8 axially upward relative to the first cylinder 9 to compress the spring, the spring is forced to compress and deform between the baffles 12, so as to adapt to the slight thickness changes on the surface of the honeycomb panel and ensure uniform clamping force.

[0029] It should be added that the pressing shell 5 has a through hole for the cutting tool 4 to slide through, and a limiting groove is axially opened on the wall of the through hole. The outer wall of the cutting tool 4 is provided with a limiting block that cooperates with the limiting groove. When the bottom side of the universal wheel 7 and the bottom side of the pressing shell 5 do not touch the honeycomb surface, the limiting block is located on the top side of the limiting groove. When the bottom side of the universal wheel 7 and the bottom side of the pressing shell 5 touch the honeycomb surface and move axially upward relative to the cutting tool 4, the top of the limiting groove gradually moves away from the limiting block.

[0030] In one embodiment, a screw 11 parallel to the axis of the cutting tool 4 is slidably inserted on the substrate 3. The bottom end of the screw 11 extends into the first cylinder 9 and is fixed to the top side of the baffle 12. A second cylinder 10 concentric with the screw 11 is rotatably disposed on the top of the substrate 3. The bottom end of the second cylinder 10 is threaded onto the top end of the screw 11.

[0031] Preferably, the top of the substrate 3 is provided with a first slider 14 that is concentric with the screw 11 and forms an annular shape, and the bottom side of the second cylinder 10 is provided with a first sliding groove 13 that cooperates with the first slider 14, so that the second cylinder 10 can rotate relative to the top of the substrate 3. The inner wall of the first cylinder 9 has a rectangular structure, and the baffle 12 has a rectangular structure and can slide relative to each other in the first cylinder 9.

[0032] Thus, by rotating the second cylinder 10 so that it interacts with the top of the screw 11, the screw 11 drives the baffle 12 to move axially in the first cylinder 9, so as to adjust the springback stroke of the floating clamping mechanism relative to the cutter head 401 according to the cutting depth or thickness of the honeycomb, so as to complete the cutting operation of the honeycomb of the corresponding thickness.

[0033] In one embodiment, a ring 15 concentric with the cutting tool 4 is rotatably provided on the top side of the substrate 3. A second gear 19 is inserted and fixed on the inner circumference of the ring 15, and a first gear 18 cooperating with the second gear 19 is sleeved and fixed on the outer circumference of the second cylinder 10. Then the ring 15 can rotate relative to the top of the substrate 3.

[0034] Preferably, the top of the substrate 3 is provided with a second slider 17 that is concentric with the cutting tool 4 and forms an annular shape, and the bottom side of the ring body 15 is provided with a second groove 16 that cooperates with the second slider 17.

[0035] A vertical plate 20 is provided on the top of the substrate 3. A locking rod 21 is threaded into the vertical plate 20. A locking groove 22 is provided on the outer periphery of the ring body 15 to engage with the locking rod 21.

[0036] Thus, by rotating the ring 15, the second gear 19 on its inner side can simultaneously drive each second cylinder 10 to rotate under the meshing action of the first gear 18, thereby synchronously adjusting the relative position of each baffle 12 in its respective first cylinder 9. After adjustment, by rotating the locking rod 21, the threaded action between the locking rod 21 and the vertical plate 20 is achieved, so that the end of the locking rod 21 is engaged and pressed against the wall of the locking groove 22, thereby locking the position of the ring 15 after rotation.

[0037] In one embodiment, the cooling component includes an air inlet pipe 26 disposed on the press-fit housing 5. A second air chamber 25 is circumferentially opened on the inner side of the press-fit housing 5, which communicates with the air outlet end of the air inlet pipe 26. A plurality of axially extending first air chambers 24 are uniformly opened circumferentially on the inner side of the press-fit housing 5. The air inlet end of the first air chamber 24 communicates with the air outlet end of the second air chamber 25. An air outlet hole 23 pointing to the blade head 401 is obliquely opened on the cavity wall of the receiving cavity 501. The air inlet end of the air outlet hole 23 communicates with the air outlet end of the first air chamber 24.

[0038] In this way, low-temperature cold air with a predetermined pressure can be introduced from the outside into the second air chamber 25 through the air inlet pipe 26. After passing through the first air chamber 24, the cold air is blown to the cutter head 401 through the air outlet 23. On the one hand, it effectively reduces the cutting heat, avoids the resin from melting and sticking to the cutter, and extends the service life of the cutter head 401. On the other hand, the airflow blows the cut fine fibers away from the cut and prevents them from being entangled again.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0040] It should be noted that if the embodiments of the invention involve directional indicators (such as up and down), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. Additionally, if the embodiments of the invention involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the invention.

Claims

1. An aramid honeycomb cutting device, characterized in that, The system includes a machine tool (1) for supporting aramid honeycomb, a base plate (3) that can move in multiple directions on the machine tool (1), and a cutting tool (4) that moves synchronously with the base plate (3) vertically at the bottom; it also includes a floating pressing mechanism and a cooling component. The floating pressing mechanism moves with the cutting tool (4) and is used to pre-press the part of the aramid honeycomb to be cut located directly below the cutting tool (4) before cutting. The cooling component is used to cool the cutting head (401) of the cutting tool (4) during cutting.

2. The aramid honeycomb cutting device as described in claim 1, characterized in that, The floating pressing mechanism includes a pressing shell (5) covering the outside of the cutting tool (4). The pressing shell (5) can move axially relative to the cutting tool (4). The pressing shell (5) is uniformly and synchronously provided with multiple radially extending support arms (6) along the circumference. The bottom side of the base plate (3) is elastically connected to the top side of the support arm (6). The bottom side of the pressing shell (5) has a receiving cavity (501) that can accommodate the cutting tool (4). The bottom side of the cutter head (401) is higher than the bottom cavity opening of the receiving cavity (501) in the vertical direction. When the pressing shell (5) moves down to press the aramid honeycomb, it forces the pressing shell (5) to move axially upward relative to the cutting tool (4), so that the cutter head (401) can touch and press the part to be cut of the aramid honeycomb.

3. The aramid honeycomb cutting device as described in claim 2, characterized in that, The bottom of the support arm (6) is provided with several casters (7), and the bottom side of the casters (7) is flush with the bottom side of the press-fit shell (5).

4. The aramid honeycomb cutting device as described in claim 3, characterized in that, The base plate (3) has a first cylinder (9) at the bottom that is parallel to the cutting tool (4). A vertical rod (8) is slidably inserted at the bottom of the first cylinder (9). The bottom of the vertical rod (8) is fixed to the top of the support arm (6). A baffle (12) is provided on the inner side of the first cylinder (9). A spring is provided between the top of the vertical rod (8) and the bottom of the baffle (12).

5. The aramid honeycomb cutting device as described in claim 4, characterized in that, A screw (11) parallel to the axis of the cutting tool (4) is slidably inserted on the substrate (3). The bottom end of the screw (11) extends into the first cylinder (9) and is fixed on the top side of the baffle (12). A second cylinder (10) concentric with the screw (11) is rotatably disposed on the top of the substrate (3). The bottom end of the second cylinder (10) is threaded onto the top end of the screw (11).

6. The aramid honeycomb cutting device as described in claim 5, characterized in that, The top of the substrate (3) is provided with a first slider (14) that is concentric with the screw (11) and in an annular shape, and the bottom side of the second cylinder (10) is provided with a first groove (13) that cooperates with the first slider (14).

7. The aramid honeycomb cutting device as described in claim 5, characterized in that, The top side of the substrate (3) is rotatably provided with an annular body (15) concentric with the cutting tool (4). A second gear (19) is inserted and fixed on the inner circumference of the annular body (15), and a first gear (18) that cooperates with the second gear (19) is sleeved and fixed on the outer circumference of the second cylinder (10).

8. The aramid honeycomb cutting device as described in claim 7, characterized in that, The top of the substrate (3) is provided with a second slider (17) that is concentric with the cutting tool (4) and is in the shape of an annulus, and the bottom side of the ring body (15) is provided with a second groove (16) that cooperates with the second slider (17).

9. The aramid honeycomb cutting device as described in claim 7, characterized in that, The base plate (3) is provided with a vertical plate (20) on the top, and a locking rod (21) is threaded into the vertical plate (20). A locking groove (22) is provided on the outer periphery of the ring body (15) to engage with the locking rod (21).

10. The aramid honeycomb cutting device as described in claim 2, characterized in that, The cooling assembly includes an air inlet pipe (26) disposed on the press-fit housing (5). A second air chamber (25) is provided circumferentially on the inner side of the press-fit housing (5) and is connected to the air outlet end of the air inlet pipe (26). A plurality of axially extending first air chambers (24) are uniformly provided circumferentially on the inner side of the press-fit housing (5). The air inlet end of the first air chamber (24) is connected to the air outlet end of the second air chamber (25). An air outlet hole (23) pointing to the blade head (401) is obliquely provided on the cavity wall of the receiving cavity (501). The air inlet end of the air outlet hole (23) is connected to the air outlet end of the first air chamber (24).

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