Carbon fiber preform cutting machine and negative pressure adsorption device thereof

Abstract

The utility model relates to cutting machine equipment technical field, especially in kind of carbon fiber preform cutting machine and negative pressure adsorption device thereof, the negative pressure adsorption device includes: at least two table board subassembly, the sealed connection between two adjacent table board subassembly, the table board subassembly includes table board frame and installs the table panel and bottom panel of two sides of table board frame, the table panel, bottom panel and table board frame form airflow channel between, the table panel forms and adsorbs the hole, adsorbs the hole with airflow channel intercommunication, bottom panel installs at least one negative pressure adsorption control module, the utility model discloses the sealed connection between two adjacent table board subassembly can improve the adsorption effect of negative pressure adsorption device whole, guarantees the cutting quality, and every table board subassembly can be manufactured individually, and the installation mode is relatively simple.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine equipment technology, and in particular to a carbon fiber preform cutting machine and its negative pressure adsorption device. Background Technology

[0002] Carbon fiber possesses advantages such as high strength, light weight, corrosion resistance, and high temperature resistance, making it widely used in aerospace, automotive, and sporting goods industries. With the successive emergence of domestically produced aircraft, the use of carbon fiber materials in aircraft wings and horizontal stabilizers has proven particularly effective in reducing fuselage weight and improving overall aircraft strength. In the aerospace field, the application involves laying down individual carbon fiber materials to a certain thickness to form a carbon fiber preform, which is then cut to net dimensions and cured. During cutting, the preform is fixed to the cutting table (the platform of the negative pressure adsorption device) using negative pressure adsorption, requiring extremely high vacuum levels to ensure stable adsorption.

[0003] Currently, the negative pressure adsorption devices of cutting machines on the market have large chambers that can form a negative pressure area under the table panel, and air flows between multiple chambers. When the carbon fiber preform is cut, it will cause local air leakage, making it difficult to maintain the vacuum of the negative pressure adsorption device, resulting in poor adsorption effect and affecting the cutting quality. Utility Model Content

[0004] This utility model solves the problems in related technologies and proposes a carbon fiber preform cutting machine and its negative pressure adsorption device. By sealing the connection between two adjacent plate components, the overall adsorption effect of the negative pressure adsorption device can be improved, ensuring the cutting quality. Moreover, each plate component can be manufactured separately, and the installation method is relatively simple.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A negative pressure adsorption device for a carbon fiber preform cutting machine includes: at least two table assemblies, with a sealed connection between two adjacent table assemblies. Each table assembly includes a table frame and a table panel and a bottom panel installed on both sides of the table frame. An airflow channel is formed between the table panel, the bottom panel, and the table frame. The table panel has adsorption holes that communicate with the airflow channel. At least one negative pressure adsorption control module is installed on the bottom panel.

[0006] As a preferred embodiment, the adsorption pore includes a connected large-diameter channel and a small-diameter channel, the large-diameter channel facing the bottom panel and the small-diameter channel facing the side away from the platform frame.

[0007] According to one embodiment of the present invention, the negative pressure adsorption control module includes a base installed on the bottom panel, the base having a hollow structure to form a negative pressure chamber, the bottom panel having a negative pressure air port, the negative pressure chamber being connected to the airflow channel through the negative pressure air port, a switch module for opening and closing the negative pressure air port being provided in the negative pressure chamber, and the base also having a bypass pipe connected to the negative pressure chamber.

[0008] According to one embodiment of the present invention, the switch module includes a cylinder and a sealing plate, wherein the cylinder is used to drive the sealing plate to connect or disconnect the negative pressure port.

[0009] As a preferred embodiment, the cylinder is a cylinder with a thrust suitable for sealing the negative pressure port, wherein the thrust is greater than or equal to P*S*0.1Kg / f, where P represents the minimum negative pressure of the vacuum in the bypass pipe, and S represents the area of ​​the sealing surface of the sealing plate facing the bottom panel.

[0010] According to one embodiment of the present invention, the platform assembly has a plurality of independent chambers sealed on all four sides, each of the independent chambers has an airflow channel, and each independent chamber is connected to at least one of the negative pressure adsorption control modules.

[0011] According to one embodiment of the present invention, a vacuum pump is also included, which is connected to one or more of the negative pressure adsorption control modules and draws air through the corresponding negative pressure adsorption control modules.

[0012] According to one embodiment of the present invention, multiple negative pressure adsorption control modules are connected through a main air pipe, which is connected to a vacuum pump, so that the vacuum pump draws air through the main air pipe and the corresponding negative pressure adsorption control module.

[0013] A carbon fiber preform cutting machine includes a negative pressure adsorption device, a frame, and a cutting device as described above. The frame is used to mount the negative pressure adsorption device, and the cutting device is used to cut the carbon fiber preform on the table.

[0014] According to one embodiment of the present invention, the frame is provided with a support assembly, the support assembly includes a plurality of support blocks, and each of the platform components corresponds to at least one support block, so that the platform component is installed on the frame by means of its corresponding support block.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The negative pressure adsorption device of the carbon fiber preform cutting machine of this utility model, by sealing the connection between two adjacent plate components, can ensure that other plate components outside the cutting area will not leak air under high negative pressure when cutting the carbon fiber preform, thereby improving the overall adsorption effect of the negative pressure adsorption device. This allows the uncut carbon fiber preform and the already cut carbon fiber preform to still be well adsorbed and fixed on the corresponding plate components, ensuring the cutting quality. Moreover, each plate component can be manufactured separately, and after being installed together with the corresponding negative pressure adsorption control module, they can be spliced ​​and sealed to form a negative pressure adsorption device, making the installation method relatively simple. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the negative pressure adsorption device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a platform assembly according to an embodiment of the present invention; Figure 3 This is a partial enlarged view of the table frame and table panel according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the cooperation relationship between the bottom panel and the negative pressure adsorption control module in one embodiment of this utility model; Figure 5 This is a schematic diagram of the negative pressure adsorption control module according to one embodiment of the present invention; Figure 6 This is a cross-sectional view of a negative pressure adsorption control module according to an embodiment of the present invention; Figure 7 This is a schematic diagram showing the cooperation relationship between the vacuum pump, the bottom panel, and the negative pressure adsorption control module according to one embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the carbon fiber preform cutting machine according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the frame structure according to one embodiment of the present invention; Figure 10 for Figure 9 Enlarged view of circle A in the middle.

[0017] In the picture: Tabletop assembly, 11. Tabletop frame, 12. Tabletop panel, 121. Adsorption hole, 121a. Large diameter channel, 121b. Small diameter channel, 13. Bottom panel, 131. Negative pressure air port, 132. Mounting block, 2. Negative pressure adsorption control module, 21. Base, 211. Negative pressure chamber, 22. Switch module, 221. Cylinder, 222. Sealing plate, 23. Bypass pipe, 3. Vacuum pump, 4. Main air pipe; 10. Negative pressure adsorption device, 20. Frame, 201. Support block, 30. Cutting device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] like Figures 1 to 4 As shown, the negative pressure adsorption device of the carbon fiber preform cutting machine of this utility model embodiment includes: at least two table plate assemblies 1 and a negative pressure adsorption control module 2. The two adjacent table plate assemblies 1 are sealed together, for example, by setting sealant or gasket in the gap between the two adjacent table plate assemblies 1 to achieve sealing. The table plate assembly 1 may include a table plate frame 11 and a table plate 12 and a bottom plate 13 installed on both sides of the table plate frame 11. An airflow channel is formed between the table plate 12, the bottom plate 13 and the table plate frame 11. The table plate 12 has an adsorption hole 121, which communicates with the airflow channel. At least one negative pressure adsorption control module 2 is installed on the bottom plate 13.

[0020] When the carbon fiber preform is on the table panel 12, the negative pressure adsorption control module 2 controls the air between the table panel assembly 1 and the carbon fiber preform to leave the table panel assembly 1 through the adsorption hole 121, the airflow channel and the negative pressure adsorption control module 2 in sequence, so as to form a high negative pressure in the table panel assembly 1 and ensure that the carbon fiber preform is stably adsorbed on the table panel 12.

[0021] Understandably, because the two adjacent platen components 1 are sealed together, the other platen components 1 outside the cutting area will not leak air under high negative pressure when the carbon fiber preform is cut, thus improving the overall adsorption effect of the negative pressure adsorption device. This allows the uncut carbon fiber preform and the cut carbon fiber preform to still be well adsorbed and fixed on the corresponding platen component 1, ensuring the cutting quality. Moreover, each platen component 1 can be assembled separately and installed together with the corresponding negative pressure adsorption control module 2. After splicing and sealing, a negative pressure adsorption device can be formed, making the installation method relatively simple.

[0022] As a preferred technical solution in this embodiment, such as Figure 3 As shown, the adsorption hole 121 may include a connected large-diameter channel 121a and a small-diameter channel 121b. The large-diameter channel 121a faces the bottom panel 13, and the small-diameter channel faces the side away from the table frame 11. When opening the adsorption hole 121 on the table panel 12, the large-diameter channel 121a can be machined first, and then the small-diameter channel 121b can be machined. Compared with directly setting the adsorption hole 121 as a small-diameter through hole, the cutting load and runout of the small-diameter tool can be reduced, the risk of small drill bit breakage can be reduced, and the coaxiality and positional accuracy of the adsorption hole 121 can be guaranteed. The variable diameter design makes the adsorption force of the adsorption hole 121 stronger, and when the table assembly 1 is vacuumed, the carbon fiber preform on the table panel 12 is supported more strongly, thereby ensuring the flatness of the working surface and improving the machining accuracy.

[0023] like Figure 5 and 6 As shown, in one embodiment of this utility model, the negative pressure adsorption control module 2 may include a base 21 and a switch module 22 mounted on the bottom panel 13. The base 21 has a hollow structure to form a negative pressure chamber 211, and the bottom panel 13 has a negative pressure air port 131. The negative pressure chamber 211 is connected to the airflow channel through the negative pressure air port 131. The switch module 22 for opening and closing the negative pressure air port 131 is provided inside the negative pressure chamber 211. The base 21 is also provided with a bypass pipe 23 connected to the negative pressure chamber 211 so that air can flow out from the bypass pipe 23 through the negative pressure air port 131. The negative pressure air port 131 may also adopt a structure similar to the adsorption hole 121 described above, and this embodiment is not limited thereto.

[0024] In one embodiment of this utility model, the switch module 22 may include a cylinder 221 and a sealing plate 222. The cylinder 221 is used to drive the sealing plate 222 to connect or disconnect the negative pressure air port 131. In some other embodiments of this utility model, the switch module 22 may also use a valve or other switching device to control the connection or disconnection of the negative pressure air port 131 with the airflow channel. This embodiment is not limited to this.

[0025] As a preferred technical solution in this embodiment, cylinder 221 employs a thrust suitable for sealing the negative pressure port 131, wherein the thrust is greater than or equal to P*S*0.1Kg / f, where P represents the minimum negative vacuum pressure inside the bypass pipe 23, and S represents the area of ​​the sealing surface of the sealing plate 222 facing the bottom panel 13. In a specific embodiment of this utility model, the minimum negative vacuum pressure inside the bypass pipe 23 is 0.07MPa, at which point the thrust of cylinder 221 should be greater than or equal to 0.07*S*0.1Kg / f.

[0026] like Figure 7 As shown, in one embodiment of this utility model, the negative pressure adsorption device may further include a vacuum pump 3, which is connected to one or more negative pressure adsorption control modules 2, for example, through a bypass pipe 23. The vacuum pump 3 is connected to the negative pressure adsorption control module 2 and air is drawn out through the corresponding negative pressure adsorption control module 2 to achieve high vacuum and high negative pressure in the platform assembly 1.

[0027] As a preferred technical solution in this embodiment, multiple negative pressure adsorption control modules 2 are connected through a main air pipe 4, for example, through a corresponding bypass pipe 23 connected to the main air pipe 4. The main air pipe 4 is connected to a vacuum pump 3 so that the vacuum pump 3 draws air through the main air pipe 4 and the corresponding negative pressure adsorption control module 2, so that the minimum value of the vacuum negative pressure in the bypass pipe 23 of multiple negative pressure adsorption control modules 2 is uniform, which facilitates the adjustment and control of the negative pressure adsorption control module 2.

[0028] In one embodiment of this invention (not shown), the platform assembly 1 has multiple independent chambers sealed on all four sides. Each independent chamber has an airflow channel, and each independent chamber is connected to at least one negative pressure adsorption control module 2, allowing the vacuum level in each independent chamber to be individually controlled by the negative pressure adsorption control module 2. The independent chambers can be separated by structures such as sealing plates and sealed using sealant or welding; this embodiment does not impose any limitations on this method.

[0029] like Figure 8 As shown, this utility model also provides a carbon fiber preform cutting machine, including a negative pressure adsorption device 10, a frame 20 and a cutting device 30 as described above, wherein the frame 20 is used to install the negative pressure adsorption device 10 and the cutting device 30 is used to cut the carbon fiber preform on the table panel 12.

[0030] Specifically, such as Figure 9 and 10As shown, a support assembly may be provided on the frame 20. The support assembly includes multiple support blocks 201, and each plate assembly 1 corresponds to at least one support block 201, so that the plate assembly 1 is installed on the frame 20 through its corresponding support block 201. When installing the negative pressure adsorption device, each plate assembly 1 can be installed on the frame 20 first through its corresponding support block 201, and then the splicing surface between two adjacent plate assemblies 1 can be sealed.

[0031] like Figure 4 As shown, the bottom panel 13 may also be provided with a mounting block 132 corresponding to the support block 201 for quick positioning. The mounting block 132 may be integrally formed with the bottom panel 13, or it may be fixed to the bottom panel 13 by welding or screw fixing. This embodiment does not impose any limitations.

[0032] The carbon fiber preform cutting machine of this utility model embodiment also has the above-mentioned beneficial effects because it includes the negative pressure adsorption device as described above, which will not be repeated here.

[0033] The above are preferred embodiments of this utility model. Those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions or modifications made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A negative pressure adsorption device for a carbon fiber preform cutting machine, characterized in that, include: At least two platform assemblies (1) are sealed together with adjacent platform assemblies (1). Each platform assembly (1) includes a platform frame (11) and a platform panel (12) and a bottom panel (13) installed on both sides of the platform frame (11). An airflow channel is formed between the platform panel (12), the bottom panel (13) and the platform frame (11). The platform panel (12) has an adsorption hole (121) that communicates with the airflow channel. At least one negative pressure adsorption control module (2) is installed on the bottom panel (13).

2. The negative pressure adsorption device according to claim 1, characterized in that, The adsorption hole (121) includes a large-diameter channel (121a) and a small-diameter channel (121b) connected together. The large-diameter channel (121a) faces the bottom panel (13), and the small-diameter channel (121b) faces the side away from the platform frame (11).

3. The negative pressure adsorption device according to claim 1, characterized in that, The negative pressure adsorption control module (2) includes a base (21) installed on the bottom panel (13). The base (21) has a hollow structure to form a negative pressure chamber (211). The bottom panel (13) has a negative pressure air port (131). The negative pressure chamber (211) is connected to the airflow channel through the negative pressure air port (131). The negative pressure chamber (211) is provided with a switch module (22) for opening and closing the negative pressure air port (131). The base (21) is also provided with a bypass pipe (23) connected to the negative pressure chamber (211).

4. The negative pressure adsorption device according to claim 3, characterized in that, The switch module (22) includes a cylinder (221) and a sealing plate (222). The cylinder (221) is used to drive the sealing plate (222) to connect or disconnect the negative pressure port (131).

5. The negative pressure adsorption device according to claim 4, characterized in that, The cylinder (221) is a cylinder (221) with thrust suitable for sealing the negative pressure port (131), wherein the thrust is greater than or equal to P*S*0.1Kg / f, P represents the minimum value of the vacuum negative pressure in the bypass pipe (23), and S represents the area of ​​the sealing surface of the sealing plate (222) facing the bottom panel (13).

6. The negative pressure adsorption device according to claim 1, characterized in that, The platform assembly (1) has multiple independent chambers sealed on all sides, each of which has an airflow channel, and each independent chamber is connected to at least one of the negative pressure adsorption control modules (2).

7. The negative pressure adsorption device according to claim 1, characterized in that, It also includes a vacuum pump (3), which is connected to one or more of the negative pressure adsorption control modules (2) and draws air through the corresponding negative pressure adsorption control module (2).

8. The negative pressure adsorption device according to claim 7, characterized in that, Multiple negative pressure adsorption control modules (2) are connected through a main air pipe (4), which is connected to a vacuum pump (3) so that the vacuum pump (3) draws air through the main air pipe (4) and the corresponding negative pressure adsorption control module (2).

9. A carbon fiber preform cutting machine, characterized in that, Includes a negative pressure adsorption device (10) as described in any one of claims 1-8, a frame (20) and a cutting device (30), wherein the frame (20) is used to mount the negative pressure adsorption device (10) and the cutting device (30) is used to cut the carbon fiber preform on the tabletop (12).

10. The carbon fiber preform cutting machine according to claim 9, characterized in that, The frame (20) is provided with a support assembly, which includes a plurality of support blocks (201). Each of the platform components (1) corresponds to at least one support block (201) so that the platform component (1) is mounted on the frame (20) by means of its corresponding support block (201).

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