Holding device for ultra-high thin-wall honeycomb and method for improving machining quality

Abstract

The invention belongs to the technical field of process equipment, and relates to a holding device for an ultra-high thin-wall honeycomb and a method for improving machining quality. The fixing device comprises a magnetic suction cup, a polyethylene foam plate and a bonding layer. Wherein the polyethylene foam board is adhered to the reinforced part of the honeycomb through the adhesive layer; magnetic suckers are fixed at the bottom ends of the polyethylene foam plates; the magnetic suction cup is used for being attracted to a tool.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of process equipment, and relates to a super-height thin-wall honeycomb holding device and a method for improving machining quality. BACKGROUND

[0002] The super-height thin-wall honeycomb has certain specific functions and is an important functional structural part on a modern aircraft. The super-height thin-wall honeycomb product is poor in rigidity and large in flexibility, and is prone to tip warping. Therefore, the super-height thin-wall honeycomb needs to be held on a device during numerical control machining.

[0003] A traditional holding method in the numerical control machining process is to paste the super-height thin-wall honeycomb on the device by using a special double-sided tape, and to perform auxiliary bonding on the tip region by using a modified acrylic adhesive. Since the honeycomb product is relatively high and the tip region is relatively thin and weak in rigidity, the precision of the honeycomb product is out of tolerance after machining, and the surface quality is poor. After the product is machined, a large amount of acetone and alcohol needs to be used to clean the adhesive of the root honeycomb, which is prone to damage the honeycomb and cause the product to be scrapped, and the cost is high, which is not conducive to environmental protection. SUMMARY

[0004] The application provides a super-height thin-wall honeycomb holding device and a method for improving machining quality, solves the problem of high-precision machining of the super-height thin-wall honeycomb product, meets the current machining requirements, improves the machining efficiency of the product, improves the production capacity of the product, reduces the machining cost, and realizes recycling.

[0005] TECHNICAL SCHEME In a first aspect, a super-height thin-wall honeycomb holding device is provided, which comprises a magnetic chuck, a polyethylene foam plate and an adhesive layer. The polyethylene foam plate is bonded to the reinforced part of the honeycomb through the adhesive layer, the bottom end of the polyethylene foam plate is fixed with the magnetic chuck, and the magnetic chuck is used to be adsorbed on a tool.

[0006] Further, the reinforced part is the outer wall of the super-height thin tip angle of the honeycomb.

[0007] Further, the adhesive layer is made of W50L12 special double-sided tape.

[0008] Further, the magnetic chuck is bonded to the bottom end of the polyethylene foam plate by a modified acrylic adhesive.

[0009] In a second aspect, a method for improving the machining quality of a super-height thin-wall honeycomb is provided, which is realized by the super-height thin-wall honeycomb holding device of claim 1, and the method comprises the following steps. Cleaning the magnetic chuck, the polyethylene foam plate and the reinforced part of the honeycomb in the super-height thin-wall honeycomb holding device; Bonding the side surface of the magnetic chuck and the polyethylene foam plate by AB glue to ensure that the lower surfaces of the two are flush. A layer of special double-sided adhesive tape is bonded on the polyethylene foam board, and the position of the adhesive tape does not protrude the polyethylene foam board; Step 6: The holding device is trial fitted, and whether the bonding position and height interfere with each other is observed; if there is interference, the polyethylene foam board can be polished appropriately to ensure the shape, and the position is determined by using a marker pen to draw a line around the bottom; After the trial fitting is correct, the adhesive tape skin is removed, and the combined device is moved to the previously drawn line, and the magnetic chuck switch is turned on to make it firmly adsorbed on the tool.

[0010] Further, the height of the polyethylene foam board is lower than the height of the honeycomb, and a finishing allowance is left.

[0011] Further, the thickness Y of the foam board is required: Y >= (60 / sqrt(X))cosX + 30 Wherein, X is the angle of the honeycomb sharp angle.

[0012] Further, the length K of the foam board is required: K >= 4Y + 20; The length of the magnetic chuck is consistent with the length of the foam board.

[0013] Beneficial effects: The application provides a kind of bonding holding method for avoiding the sharp part of the super height thin-walled honeycomb product from being raised due to the height being too high and the thickness being too thin, improving the processing precision and processing efficiency of the super height thin-walled honeycomb product, and reducing the production cost. DETAILED DESCRIPTION

[0014] Figure 1 It is a structure diagram of a holding device for a super height thin-walled honeycomb.

[0015] Figure 2 It is a schematic diagram of the installation of the holding device. DETAILED DESCRIPTION

[0016] To make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0017] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and does not limit the scope of the present application. The present application is not limited to the specific settings and methods described below, but covers any modifications, equivalents, and alternatives falling within the spirit and scope of the present application. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessary obscurity of the present application.

[0018] In the description of the present application, it should be noted that the directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the directions or positional relationships described in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as limiting the present application. In addition, the ordinal numbers (for example, "first" and "second") are used to distinguish objects, and are not limited to the order, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, "mounting", "connection", and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] The present application will be described in further detail below in combination with the embodiments and the drawings, but the embodiments of the present application are not limited thereto.

[0022] The present application provides a kind of ultra-high thin-walled honeycomb holding device 1, as shown in Figure 1 Magnetic chuck 2, polyethylene foam plate 3, adhesive layer 4; Wherein, polyethylene foam plate 3 is bonded at the reinforced place of honeycomb by adhesive layer 4;The bottom end of polyethylene foam plate is fixed magnetic chuck 2;Magnetic chuck 2 is used to be adsorbed on tooling.

[0023] The reinforced place is the outer wall of the ultra-high thin sharp corner of honeycomb The adhesive layer adopts W50L12 special double-sided tape.

[0024] The magnetic chuck is adhered to the bottom end of the polyethylene foam board by a modified acrylate adhesive.

[0025] The angle X (°) of the honeycomb sharp corner, the thickness Y (mm) of the foam board, and the length K (mm) of the foam board Y≥(60 / √X)cosX+30 K≥4Y+20.

[0026] The length of the magnetic chuck is consistent with the length of the foam board, and the unit of X is degree.

[0027] The present application provides a kind of super height thin-walled honeycomb high-precision holding method, using the above device to hold as Figure 2 As shown, the method comprises the following steps: First step: check the integrity of the magnetic chuck, and clean it. Use alcohol, acetone and medical gauze to wipe the surface clean, ensure the surface is flat and free of pollution, and air dry for 10-15 minutes at room temperature; Second step: clean the polyethylene foam board, use alcohol, acetone and medical gauze to wipe the surface clean, ensure the surface is flat and free of pollution, and air dry for 10-15 minutes at room temperature; Third step: clean the honeycomb at the bonding and reinforcement site, ensure that the bonding surface is free of burrs and dust, and the root area is free of excess material, use alcohol, acetone and medical gauze to wipe the surface clean, ensure the surface is flat and free of pollution, and air dry for 10-15 minutes at room temperature; Fourth step: bond the side of the magnetic chuck to the polyethylene foam board with AB glue, ensure that the lower surfaces of the two are flush (the height of the polyethylene foam board is slightly lower than the height of the honeycomb, leaving a finishing allowance); AB glue is a modified acrylate adhesive.

[0028] Fifth step: bond a layer of special double-sided tape to the polyethylene foam board, and the tape position should not protrude from the polyethylene foam board; Sixth step: try on the combined device, observe whether the bonding position and height interfere with each other, if there is interference, polish the polyethylene foam board appropriately to ensure the shape, and mark the position with a marker around the bottom; Seventh step: after the trial is successful, remove the tape and move the combined device to the marked position, turn on the magnetic chuck switch to make it firmly adhere to the tool.

[0029] The characteristics of super high thin-walled honeycomb are very significant. First of all, it has excellent lightweight and high-strength characteristics, its density is significantly lower than that of many traditional materials, but it can withstand considerable external force without significant deformation or damage. The structure design is more optimized, which can significantly improve the mechanical properties of the material while reducing weight, which makes it have incomparable advantages in scenes with strict requirements on weight and strength. It realizes higher performance and lower cost.

[0030] Thin-walled honeycomb sharp corners are the "wisdom points" to improve the structural strength. When external load acts on the honeycomb structure, stress concentration phenomenon will occur at the sharp corners, and the overall load will be dispersed to each honeycomb unit. This stress dispersion mechanism makes the material not prone to overall fracture when subjected to pressure and tension, but absorbs energy through local deformation, thereby improving the toughness and impact resistance of the material. This seemingly unfavorable feature, through scientific design, becomes an important mechanism for dispersing stress. The honeycomb structure, with its high mechanical performance and lightweight advantage, has become a key material in modern engineering.

[0031] From microstructure design to macroscopic engineering application, honeycomb sharp corners, with their unique geometric wisdom, are constantly expanding the performance boundaries of materials.

[0032] For example, Table 1 shows different honeycomb angle choices for different foam board thicknesses and lengths.

[0033] Table 1

Claims

1. A holding device (1) for super-high thin-walled honeycombs, characterized in that, It comprises: a magnetic chuck (2), a polyethylene foam board (3), and an adhesive layer (4); wherein the polyethylene foam board (3) is adhered to the reinforced part of the honeycomb through the adhesive layer (4); the bottom end of the polyethylene foam board is fixed with the magnetic chuck (2); and the magnetic chuck (2) is used for adsorption on a tool.

2. The apparatus of claim 1, wherein, The reinforced part is the outer wall of the super-high thin sharp angle of the honeycomb.

3. The apparatus of claim 1, wherein, The adhesive layer adopts W50L12 special double-sided adhesive tape.

4. The apparatus of claim 1, wherein, The magnetic chuck is adhered to the bottom end of the polyethylene foam board through a modified acrylic adhesive.

5. A method for improving the machining quality of an ultra-high thin-walled honeycomb, characterized by, The method is realized by the super-high thin-wall honeycomb holding device of claim 1, and the method comprises: cleaning the magnetic chuck (1), the polyethylene foam board (2), and the reinforced part of the honeycomb in the holding device of the super-high thin-wall honeycomb; adhering the side surface of the magnetic chuck to the polyethylene foam board through AB adhesive, so as to ensure that the lower surfaces of the two are flush; adhering a layer of special double-sided adhesive tape to the polyethylene foam board, and the position of the adhesive tape does not protrude from the polyethylene foam board; sixth step: try on the holding device, observe whether the adhesive position and height interfere with each other, and if there is interference, appropriately polish the polyethylene foam board to ensure the shape, and use a marker to draw a line around the bottom to determine the position; after the try-on is correct, remove the adhesive tape skin, move the combined device to the previously drawn line, turn on the switch of the magnetic chuck, and make the magnetic chuck firmly adsorbed on the tool.

6. The method of claim 5, wherein, The height of the polyethylene foam board is lower than the height of the honeycomb, and a finishing allowance is left.

7. The method of claim 5, wherein, Requirements on the thickness Y of the foam board: Y≥(60 / √X)cosX+30 wherein X is the angle of the sharp angle of the honeycomb.

8. The method of claim 7, wherein, Requirements on the length K of the foam board: K≥4Y+20; the length of the magnetic chuck is consistent with the length of the foam board.

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