A glue filling auxiliary tool for honeycomb sandwich composite material

Abstract

The utility model discloses a kind of glue filling auxiliary tool for honeycomb sandwich composite material, to solve the problems of difficult control of glue amount, glue liquid overflow, internal air hole, cumbersome operation and tooling separation inconvenience in the process of existing honeycomb board glue filling. The tooling includes integrally-formed inner baffle and outer pressing plate: the inner baffle is embedded in the inside of the glue filling area to be filled;Outer pressing plate is pressed on the upper surface of honeycomb board, the lower surface is provided with negative pressure groove evenly distributed along the edge, a plurality of air plugs and at least one quick connector type air valve are arranged on the groove, and the air valve is connected with a negative pressure device to realize the close contact of the tooling and the honeycomb board. The tooling does not need adhesive tape to protect the surrounding area, can avoid glue liquid overflow and internal air hole, and ensure the uniformity of glue filling thickness. At the same time, the operation process is simplified, the waste of raw materials and labor cost are reduced, and the tooling is suitable for batch production, which significantly improves the quality and processing efficiency of honeycomb sandwich composite material glue filling.

Description

Technical Field

[0001] This utility model relates to an auxiliary tooling for dispensing adhesive into honeycomb sandwich composite materials. Background Technology

[0002] In the fabrication of honeycomb panels in the aerospace field, some structures require that specific areas of the honeycomb panel be filled with potting compound, and the potting compound thickness be no less than 2mm. The existing processing method is to mill down by 2mm compared to the nominal size when machining this area of ​​the honeycomb panel, so as to reserve the potting area and ensure that the final potting compound thickness meets the requirements.

[0003] However, the existing processing method has obvious drawbacks: the amount of glue used in the potting process depends entirely on the operator's personal skills and experience, making it difficult to accurately control the optimal potting volume range of 2-3mm. If too much glue is used, the potting area needs to be milled, which wastes raw materials and increases machining time; if too little glue is used, localized gaps will appear when the potting process is finished, requiring reprocessing after adding glue and curing, which increases labor and machine tool costs and also affects the product production schedule.

[0004] Meanwhile, the existing potting process also has problems such as glue overflow and air bubbles inside the potting glue causing inaccuracies. In addition, the surrounding area needs to be protected with tape before each potting, which is cumbersome. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary tooling for dispensing honeycomb sandwich composite materials, aiming to solve the defects of existing technologies such as insufficient dispensing accuracy, easy over- or under-dispensing, and poor surface smoothness of the potting compound, thereby achieving precise dispensing control and simple operation. The specific technical solution is as follows:

[0006] An auxiliary tooling for dispensing adhesive into honeycomb sandwich composite materials includes an integrally formed inner baffle and an outer pressure plate. The inner baffle is fitted into the inner side of the area to be dispensed with adhesive, and its surface is provided with scale lines for controlling the dispensing height. The outer pressure plate is pressed onto the upper surface of the honeycomb panel, and its lower surface is provided with negative pressure grooves evenly distributed along the edge. The negative pressure grooves are equipped with multiple air plugs and at least one valve. The valve is connected to a negative pressure device to achieve a tight fit between the outer pressure plate and the honeycomb panel.

[0007] Furthermore, the scale lines are marked with a 2.5-3mm reference range for the amount of adhesive used, and are distributed at the external corner of the inner baffle. Positioning the scale lines at the external corner of the inner baffle maximizes the operator's viewing angle, allowing for clear observation of the adhesive height without frequent adjustments to their position. This ensures uniform adhesive thickness across the board, further improving sealing accuracy.

[0008] Furthermore, the negative pressure groove has an overall U-shaped structure and is adapted to the edge contour of the outer pressure plate. The negative pressure adsorption force is evenly distributed along the edge of the outer pressure plate, avoiding loosening of the outer pressure plate due to insufficient local adsorption force. This ensures a tight fit between the outer pressure plate and the honeycomb panel, preventing glue overflow during the glue pouring process from the source.

[0009] Furthermore, the negative pressure groove has a width of 4-6 mm and a depth of 2-4 mm, and the groove opening edge has a rounded transition of 0.3-0.5 mm. The rounded transition at the groove opening edge can, on the one hand, prevent sharp edges from scratching the surface of the honeycomb board and protect the substrate, and on the other hand, reduce the dead corners of residual air in the negative pressure groove, making the vacuuming more thorough and further improving the adsorption stability.

[0010] Furthermore, the air-blocking plug is a detachable structure that is interference-fitted with the through-hole on the negative pressure groove. When the outer pressure plate and the honeycomb panel are stuck together due to residual adhesive, the air-blocking plug can be quickly removed and pried apart through the through-hole. The interference fit ensures the sealing between the air-blocking plug and the through-hole during vacuuming, preventing air from seeping into the negative pressure groove through the through-hole, ensuring the negative pressure adsorption effect, preventing the outer pressure plate from shifting during glue filling and affecting the filling quality, and also preventing the air-blocking plug from falling off under negative pressure.

[0011] Furthermore, the inner baffle is 10-15mm thick, and the edges of the inner baffle that contact the inner wall of the area to be filled with glue are provided with rounded chamfers of R0.5-R1mm.

[0012] Furthermore, the valve is equipped with a quick-connect structure. The quick-connect allows for rapid insertion and removal of the valve and the negative pressure device pipeline. Compared to traditional threaded connections, it eliminates the need for repeated tightening to complete pipeline connection or disassembly, significantly reducing tooling installation and disassembly time and improving operational efficiency.

[0013] Furthermore, both the inner baffle and the outer pressure plate are made of lightweight aluminum alloy.

[0014] The beneficial effects of this utility model are as follows:

[0015] This dispensing auxiliary fixture, through its integrated structural design, comprehensively improves both dispensing quality and operational efficiency. The inner baffle's scale lines precisely mark the dispensing reference range, and its corner layout facilitates observation, effectively avoiding rework or time-consuming milling caused by improper dispensing volume.

[0016] The outer pressure plate uses a negative pressure groove for adsorption, which stabilizes the tooling while preventing glue overflow and avoiding damage to the honeycomb panel surface. The air-sealing plug has an interference fit for sealing and is removable for easy separation. It is suitable for mass production, reducing raw material and labor costs, and ensuring consistent potting and substrate integrity. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a honeycomb panel with grooves;

[0018] Figure 2 This is a schematic diagram of the overall structure of an auxiliary tooling for dispensing adhesives for honeycomb sandwich composite materials;

[0019] Figure 3 This is a structural schematic diagram of this type of auxiliary tooling;

[0020] Figure 4 This is a schematic diagram of the bottom structure of this type of auxiliary tooling;

[0021] In the diagram: 1. Honeycomb panel, 2. Valve, 3. Inner baffle, 4. Air plug, 5. Outer pressure plate, 6. Negative pressure groove, 7. Scale line. Detailed Implementation

[0022] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0023] Example 1: As Figure 1-4 As shown, an auxiliary tooling for dispensing adhesive for honeycomb sandwich composite materials includes an integrally formed inner baffle 3 and an outer pressure plate 5. The inner baffle 3 is fitted inside the area to be dispensed adhesive, and the outer pressure plate 5 is pressed onto the upper surface of the honeycomb panel 1.

[0024] The inner baffle 3 has scale lines 7 on its surface; during glue pouring, the glue pouring height can be controlled by observing the scale lines 7.

[0025] The lower surface of the outer pressure plate 5 is provided with a negative pressure groove 6, which is evenly distributed along the edge of the outer pressure plate 5. The negative pressure groove 6 is provided with multiple air plugs 4 and at least one air valve 2. In use, the air valve 2 is connected to a negative pressure device, and the air in the negative pressure groove 6 is evacuated by negative pressure vacuuming. Under the action of the negative pressure groove 6, the outer pressure plate 5 is tightly adhered to the upper surface of the honeycomb panel 1. After the glue is applied, the negative pressure device is turned off, and the outer pressure plate 5 can be removed.

[0026] If a small amount of residual adhesive sticks the outer pressure plate 5 to the honeycomb panel 1 and makes it difficult to separate them, remove multiple air plugs 4 in sequence, and use a guide rod to insert into the through hole where the air plug 4 is located, and slowly peel the outer pressure plate 5 from the honeycomb panel 1 by prying it in sequence.

[0027] Usage steps:

[0028] S1. Tooling and substrate preparation: Confirm that the area of ​​the honeycomb panel 1 to be filled with glue is clean and free of impurities. Check the structural integrity of the inner baffle 3 and the outer pressure plate 5. Ensure that the scale line 7 is clear, the negative pressure groove 6 is not blocked, and the air plug 4 is installed in place. Prepare the negative pressure device and guide rod.

[0029] S2. Inner baffle fitting: Precisely fit the inner baffle 3 into the inner side of the area to be filled with glue in the honeycomb panel 1, ensuring that the edge of the inner baffle 3 fits against the inner wall of the area, and avoid scratching the inner wall of the honeycomb panel 1.

[0030] S3. Positioning and negative pressure connection of the outer pressure plate: Cover the upper surface of the honeycomb plate 1 with the outer pressure plate 5, so that the U-shaped negative pressure groove 6 on the lower surface of the outer pressure plate 5 corresponds to the outer periphery of the area to be filled with glue on the honeycomb plate 1. Quickly connect the valve 2 to the pipeline of the negative pressure device through the quick connector structure of the valve 2.

[0031] S4. Negative pressure fixing: Start the negative pressure device and draw a vacuum into the negative pressure groove 6 through valve 2. After a stable vacuum is formed in the negative pressure groove 6, close the negative pressure device. At this time, the outer pressure plate 5 is tightly attached to the upper surface of the honeycomb plate 1 under the action of negative pressure. After checking that there is no looseness, prepare to inject glue.

[0032] S5. Observe the glue pouring: Pour the glue into the area to be filled in the honeycomb panel 1. During the process, observe the scale line 7 at the external corner of the inner baffle 3 to ensure that the glue level is within the range marked by the scale line 7 and to ensure that the glue pouring height is uniform.

[0033] S6. Adhesive curing and tooling separation: After the potting adhesive has completely cured, turn off the negative pressure device. If the outer pressure plate 5 is not adhered to the honeycomb panel 1, remove the outer pressure plate 5 and the inner baffle 3 directly. If there is residual adhesive, remove the air plug 4 on the negative pressure groove 6 in sequence, insert the guide rod into the through hole where the air plug 4 is located, and slowly pry the outer pressure plate 5 to separate it from the honeycomb panel 1.

[0034] S7. Tooling cleaning: After removing the inner baffle 3 and the outer pressure plate 5, clean the residual potting compound on the surface, check the status of the scale line 7, negative pressure groove 6, valve 2 and air plug 4, and ensure that the tooling is in good condition for the next use.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue-pouring auxiliary tooling for honeycomb sandwich composite materials, characterized in that, It includes an integrally formed inner baffle and an outer pressure plate; the inner baffle is used to fit inside the area to be filled with glue, and its surface is provided with scale lines for controlling the filling height; the outer pressure plate is used to press onto the upper surface of the honeycomb panel, and its lower surface is provided with negative pressure grooves evenly distributed along the edge. The negative pressure grooves are equipped with multiple air plugs and at least one valve, and the valve is connected to a negative pressure device to achieve a tight fit between the outer pressure plate and the honeycomb panel.

2. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, The scale lines indicate a glue volume reference range of 2.5-3mm and are distributed at the external corners of the inner baffle.

3. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, The negative pressure groove has an overall U-shaped structure and is adapted to the edge contour of the outer pressure plate.

4. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 3, characterized in that, The negative pressure groove has a width of 4-6mm and a depth of 2-4mm, and the groove opening edge has a rounded corner transition of 0.3-0.5mm.

5. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, The air plug is a detachable structure that is interference-fitted with the through hole on the negative pressure groove.

6. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, The inner baffle is 10-15mm thick, and the edges of the inner baffle that contact the inner wall of the area to be filled with glue are provided with rounded chamfers of R0.5-R1mm.

7. The glue-pouring auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, The valve is equipped with a quick-connect structure.

8. The potting auxiliary tooling for honeycomb sandwich composite materials according to claim 1, characterized in that, Both the inner baffle and the outer pressure plate are made of lightweight aluminum alloy.

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