Novel wing mold closing method for wing of wing-in-ground-effect vehicle

Abstract

The invention belongs to the field of wing-in-ground-effect ships, and particularly relates to a novel wing-in-ground-effect ship wing mold closing method, which comprises the following steps of: sticking paper adhesive tapes on a wall rib bonding surface of a wall plate provided with wall ribs at intervals, correspondingly sticking a pressing sheet with the height of 9-11 mm on the paper adhesive tapes, placing a wall plate without wall ribs on the wall plate provided with the wall ribs and adhered with the pressing sheet on the wall ribs, and clamping the wall ribs on the wall plate with the pressing sheet, so that the wing-in-ground-effect ship wing mold closing method is realized. The wall ribs are shaped, so that the wall ribs are better attached to the wall plates, glue joint of the wall ribs and the wall plates is facilitated, it is guaranteed that no deviation occurs in wing mold closing, and the production efficiency is improved. And the die assembly quality and efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the field of wing-in-ground-effect craft, and particularly relates to a novel method for molding the wing of a wing-in-ground-effect craft. Background Art

[0002] A wing-in-ground-effect craft is a vessel made using the principle of ground effect, and has the characteristics of high speed, good cruising performance, large load capacity, high safety performance, etc. As a high-speed aircraft between an airplane and a ship, the wing-in-ground-effect craft has the advantages of both a ship and an airplane, that is, it has a speed that a ship cannot match and a load capacity that an airplane cannot reach, and the composite material wing structure is an indispensable and important structure in the research and development of wing-in-ground-effect craft.

[0003] For traditional composite material wings, the mold joint of the upper and lower wings entirely depends on the bonding of a flexible skin, which results in insufficient stiffness in the wingspan direction of the wing. It is necessary to design a load-bearing beam with very strong structural stiffness to increase the stiffness in the wingspan direction of the wing. However, this will increase the overall weight of the wing and thus cause a loss to the load capacity of the airplane. Secondly, the assembly accuracy requirements for the beam rib structure before wing molding are extremely high, so extremely high requirements are imposed on the manufacturing accuracy of parts and the operators. There are many links that require on-site repair and fitting, and a large number of parts are used. The assembly workload is large, and there are a large number of cumulative tolerances in the assembly of parts, which is not conducive to ensuring the assembly accuracy of the wing and is not conducive to meeting the requirements of light weight and low cost of the wing structure. Directly using prepreg for gluing the wall panel and the wall rib is difficult to operate, with a large degree of uncertainty, and is likely to cause defects such as lack of material and uneven thickness in the product.

[0004] In order to overcome the drawbacks of traditional composite material wings, the prior patent CN206255194U discloses a wing structure of a wing-in-ground-effect craft. To meet the design indicators and comprehensive performance, it is necessary to ensure the fitting of the upper and lower wing surface wall panels and the wall ribs. Due to processing errors and installation and other factors, there may be a certain error between the distance between the wall ribs and the wall panels and the designed situation, resulting in deviation in wing molding, and further affecting the quality and efficiency of molding. Summary of the Invention

[0005] In order to solve the problems in the background art, the present invention discloses a novel method for molding the wing of a wing-in-ground-effect craft. After the wall panel is demolded, the process edges are removed through pre-molding, then the wall ribs are shaped and cleaned, and finally glued, so that the wall ribs and the wall panel are more closely fitted, improving the quality and efficiency of molding.

[0006] In order to achieve the above-mentioned invention purpose, the technical solution disclosed by the present invention is as follows:

[0007] A novel method for molding the wing of a wing-in-ground-effect craft, comprising the following steps:

[0008] Step 1: Confirm that each wall panel of the wing surface has been manufactured.

[0009] Step 2: Demold each panel: Gently shake the wing panel in the mold, and use a tool to slide along the gap between the panel edge and the mold to separate the panel from the mold. After the wing panel is completely demolded, place it back into the mold.

[0010] Step 3: Pre-closing the mold: Take out the panel without installed wall ribs from the mold and place it on the panel with installed wall ribs set correspondingly. Adjust the position of the panel without installed wall ribs to pre-close the mold with the panel with installed wall ribs. Shape the panels respectively, remove the process edges, and then take down the panel without installed wall ribs after shaping and put it back into the mold.

[0011] Step 4: Grinding and shaping the wall ribs: Stick paper tapes on the wall rib bonding surfaces of the panels with installed wall ribs at intervals of 50 mm - 100 mm, and bond pressing sheets with a height of 9 - 11 mm on the corresponding paper tapes. In the areas with a larger curvature of the wall rib bonding surface, the paper tapes are denser and the spacing between the pressing sheets is smaller. Place the panel without installed wall ribs on the panel with installed wall ribs with pressing sheets adhered on the wall ribs, press it evenly with force, take down the panel without installed wall ribs, observe the thickness of the pressing sheets, and determine the fitting condition of the wall ribs based on the thickness after compression of the pressing sheets. If the wall ribs are fitted, proceed to the next step; if the wall ribs are not fitted, the wall ribs need to be ground and shaped. Remove the paper tapes and plasticine, and sand the wall rib bonding surfaces. Repeat Step 4 until the wall ribs are fitted.

[0012] Step 5: Cleaning and gluing: Clean the wall ribs after grinding and shaping in Step 4, apply glue on the wall rib bonding surfaces, and glue the panel with installed wall ribs and the panel without installed wall ribs.

[0013] Further, for the new wing closing mold method of the wing-in-ground effect ship, if the thickness after compression of the pressing sheet is greater than 1 mm, the wall ribs need to be ground and shaped; if the thickness after compression of the pressing sheet is less than 1 mm, the wall ribs do not need to be ground and shaped.

[0014] Further, for the new wing closing mold method of the wing-in-ground effect ship, the pressing sheet can be compressed under pressure and does not rebound after the pressure is removed.

[0015] Further, for the new wing closing mold method of the wing-in-ground effect ship, in Step 5, the panels and the wall ribs are glued with epoxy resin, and polyurethane powder is added to the epoxy resin. The purpose of adding polyurethane powder is to increase the viscosity and improve the gluing effect, and the addition amount of polyurethane powder is added according to actual needs.

[0016] Further, for the new wing closing mold method of the wing-in-ground effect ship, the pressing sheet is plasticine.

[0017] Further, for the new wing closing mold method of the wing-in-ground effect ship, when cleaning the wall ribs, wipe them repeatedly with a cloth soaked in alcohol or acetone and replace the cloth until there is no visible stain on the cloth.

[0018] Furthermore, in the novel wing mold closing method of the wing-in-ground effect craft, the surface of the wall ribs that has been cleaned is prohibited from contacting unclean things, hand contact is not allowed, and it should be placed in a clean environment.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the novel wing mold closing method of the wing-in-ground effect craft disclosed by the present invention, on the wall rib bonding surface of the wall panel with the wall ribs already installed, sticker tapes are pasted every 50 mm - 100 mm. On the sticker tapes, press pieces with a height of 9 - 11 mm are adhesively connected correspondingly. Place the wall panel without the wall ribs installed on the wall panel with the wall ribs already installed on which the press pieces are adhesively connected, and compact it evenly with force. Remove the wall panel without the wall ribs installed, observe the thickness of the press pieces, determine the fitting condition of the wall ribs through the thickness after compression of the press pieces, and determine the distance between the two wall panels through the thickness after compression of the press pieces, so as to modify the wall ribs, make the wall ribs fit the wall panel better, be conducive to the bonding of the wall ribs and the wall panel, ensure that there is no deviation in the wing mold closing, and improve the quality and efficiency of the mold closing. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the wall panel with the wall ribs already installed in the present invention;

[0022] In the above figure: 1 - wall panel; 2 - wall rib. Detailed Embodiments

[0023] In order to make the features and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below, such as Figure 1 As shown, the novel wing mold closing method of the wing-in-ground effect craft of the present invention can ensure the fitting of the upper and lower wing surface wall panels 1 and the wall ribs 2, avoid deviation in the wing mold closing, improve the quality and efficiency of the mold closing, and meet the design indicators and comprehensive performance.

[0024] Embodiment 1

[0025] Step 1: Confirm that all the wall panels of the vertical stabilizer have been manufactured, the vertical stabilizer and the rudder are not separated, and the wall rib parts of the vertical stabilizer are installed. Install them on the right wall panel of the vertical stabilizer;

[0026] Step 2: Demold each wall panel: Gently shake the wall panel in the mold, and use a plastic sheet to slide along the gap between the edge of the wall panel and the mold to make the wall panel separate from the mold. After the wing surface wall panel is completely demolded, still place it back into the mold;

[0027] Step 3: Pre-closing the mold: Take out the left vertical stabilizer panel without the installed wall ribs and place it on the right vertical stabilizer panel with the installed wall ribs. Adjust the position of the left vertical stabilizer panel to pre-close the mold between the left vertical stabilizer panel without the installed wall ribs and the right vertical stabilizer panel with the installed wall ribs. Perform profiling on the left and right vertical stabilizer panels respectively to remove the process edges;

[0028] Step 4: Grinding and profiling of the wall ribs: Remove the profiled left vertical stabilizer panel and put it back into the mold. On the bonding surface of the wall ribs of the right vertical stabilizer panel, stick a yellow paper tape every 50 mm - 100 mm. Place small lumps of plasticine with a height of

[0029] 9 - 11 mm on the yellow paper tape. It should be noted here that preferably the height of the plasticine is 10 mm. Place the left vertical stabilizer panel without the installed wall ribs on the right vertical stabilizer panel with the installed wall ribs and press it evenly with force. Then remove the left vertical stabilizer panel and observe the thickness of the plasticine lumps after compression. Determine the fitting condition of the wall ribs based on the thickness of the plasticine lumps after compression. If the thickness of the plasticine lumps after compression is less than 1 mm, that is, the wall ribs are fitted, proceed to the next step. If the thickness of the plasticine lumps after compression is greater than 1 mm, that is, the wall ribs are not fitted and need to be ground and profiled. Remove the tape paper and the plasticine lumps, and grind the bonding surface of the wall ribs with sandpaper. Repeat Step 4 repeatedly until the thickness of all the compressed plasticine is less than 1 mm;

[0030] Step 5: Cleaning and gluing: Clean the ground and profiled wall ribs, apply LT5028 series epoxy resin on the bonding surface of the wall ribs, and glue the right vertical stabilizer panel with the installed wall ribs and the left vertical stabilizer panel without the installed wall ribs.

[0031] Example 2

[0032] Step 1: Confirm that all the outer wing panels have been manufactured, the outer wing and the aileron are not separated, and the outer wing wall ribs are installed. Install them on the upper right panel of the outer wing;

[0033] Step 2: Demold each panel: Gently shake the panel in the mold and use a plastic sheet to slide along the gap between the edge of the panel and the mold to separate the panel from the mold. After the wing surface panel is completely demolded, still put it back into the mold.

[0034] Step 3: Pre-closing the mold: Take out the lower right outer wing panel without the installed wall ribs and place it on the upper right outer wing panel with the installed wall ribs set correspondingly. Adjust the position of the lower right outer wing panel without the installed wall ribs to pre-close the mold between the lower right outer wing panel without the installed wall ribs and the upper right outer wing panel with the installed wall ribs. Perform profiling on the lower right outer wing panel without the installed wall ribs and the upper right outer wing panel with the installed wall ribs to remove the process edges, and then remove the profiled lower right outer wing panel and put it back into the mold;

[0035] Step 4: Wall rib grinding and shaping: Stick a yellow paper tape every 50mm - 100mm on the bonding surface of the wall rib of the upper right wall panel of the outer wing where the wall rib has been installed. Place small lumps of plasticine with a height of 9 - 11mm on the yellow paper tape. It should be noted here that preferably the height of the plasticine is equal to 10mm. Place the lower right wall panel of the outer wing with the wall rib that has not been installed after shaping on the upper right wall panel of the outer wing where the wall rib has been installed, and press it evenly with force. Then remove the lower right wall panel of the outer wing with the wall rib that has not been installed, and observe the thickness of the plasticine lump after compression. Determine the fitting condition of the wall rib based on the thickness of the plasticine lump after compression. If the thickness of the plasticine lump after compression is less than 1mm, that is, the wall rib fits, and proceed to the next step. If the thickness of the plasticine lump after compression is greater than 1mm, that is, the wall rib does not fit and needs to be ground and shaped. Remove the tape paper and the plasticine lump, and use sandpaper to grind the bonding surface of the wall rib. Repeat Step 4 repeatedly until the thickness of all plasticine lumps after compression is less than 1mm;

[0036] Step 5: Clean and bond: Clean the wall rib after grinding and shaping in Step 4, apply LT5028 series epoxy resin on the bonding surface of the wall rib, and bond the lower right wall panel of the outer wing with the wall rib that has not been installed to the upper right wall panel of the outer wing where the wall rib has been installed.

[0037] Example 3

[0038] Step 1: Confirm that all wall panels of the horizontal stabilizer have been manufactured, the horizontal stabilizer and the elevator have not been separated, and the wall ribs have been installed. Install them on the upper wall panel;

[0039] Step 2: Demold each wall panel: Gently shake the wing surface wall panel in the mold, and use a plastic sheet to slide along the gap between the edge of the wall panel and the mold to separate the wall panel from the mold. After the wing surface wall panel is completely demolded, still place it back in the mold;

[0040] Step 3: Pre - close the mold: Take out the lower wall panel of the horizontal stabilizer with the wall rib that has not been installed from the mold, place it on the upper wall panel of the horizontal stabilizer where the wall rib has been installed and set correspondingly. Adjust the position of the lower wall panel of the horizontal stabilizer with the wall rib that has not been installed to pre - close the mold between the lower wall panel of the horizontal stabilizer with the wall rib that has not been installed and the upper wall panel of the horizontal stabilizer where the wall rib has been installed. Shape the lower wall panel of the horizontal stabilizer with the wall rib that has not been installed and the upper wall panel of the horizontal stabilizer where the wall rib has been installed, and remove the process edge. Then take down the shaped lower wall panel of the horizontal stabilizer and put it back in the mold;

[0041] Step 4: Wall rib grinding and shaping: Stick a yellow paper tape every 50 mm - 100 mm on the wall rib bonding surface of the upper panel of the horizontal stabilizer where the wall ribs have been installed. Place small lumps of plasticine with a height of 9 - 11 mm on the yellow paper tape. It should be noted here that in areas with a larger curvature, the small lumps of plasticine should be placed more densely. Preferably, the height of the plasticine is equal to 10 mm. Place the lower panel of the horizontal stabilizer without the installed wall ribs, which has been shaped, on the upper panel of the horizontal stabilizer with the installed wall ribs, and press it evenly with force. Then remove the lower panel of the horizontal stabilizer without the installed wall ribs, and observe the thickness of the small lumps of plasticine after compression. Determine the fitting condition of the wall ribs based on the thickness of the small lumps of plasticine after compression. If the thickness of the small lumps of plasticine after compression is less than 1 mm, that is, the wall ribs are well-fitted, proceed to the next step. If the thickness of the small lumps of plasticine after compression is greater than 1 mm, that is, the wall ribs are not well-fitted and need to be ground and shaped. Remove the tape paper and the small lumps of plasticine, and use sandpaper to grind the wall rib bonding surface. Repeat Step 4 repeatedly until the thickness of all small lumps of plasticine after compression is less than 1 mm;

[0042] Step 5: Cleaning and bonding: Clean the wall ribs after grinding and shaping in Step 4, apply LT5028 series epoxy resin on the wall rib bonding surface, and bond the lower panel of the horizontal stabilizer without the installed wall ribs to the upper panel of the horizontal stabilizer with the installed wall ribs.

[0043] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0044] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A new method for mold closing of the wing of a wing-in-ground effect ship, characterized in that, it includes the following steps: Step 1: Confirm that all the panel boards of the wing surface have been manufactured; Step 2: Demold each panel board: Gently shake the panel board of the wing surface in the mold, and use a tool to slide along the gap between the edge of the panel board and the mold, so that the panel board is separated from the mold. After the panel board of the wing surface is completely demolded, put it back into the mold; Step 3: Pre-mold closing: Take out the panel board without installed wall ribs from the mold and place it on the panel board with installed wall ribs set correspondingly. Adjust the position of the panel board without installed wall ribs to pre-mold close the panel board without installed wall ribs and the panel board with installed wall ribs. Shape the said panel boards respectively, remove the process edges, and then take down the panel board without installed wall ribs after shaping and put it back into the mold; Step 4: Grinding and shaping of the wall ribs: Stick paper tapes on the wall rib bonding surfaces of the panel boards with installed wall ribs at intervals of 50mm - 100mm. Stick pressing pieces with a height of 9 - 11mm correspondingly on the said paper tapes. Place the panel board without installed wall ribs on the panel board with installed wall ribs on which the pressing pieces are adhered on the wall ribs, press evenly with force, take down the panel board without installed wall ribs, observe the thickness of the pressing pieces, and determine the fitting situation of the wall ribs through the thickness after compression of the pressing pieces. If the wall ribs are fitted, proceed to the next step. If the wall ribs are not fitted, the wall ribs need to be ground and shaped. Remove the paper tapes and plasticine, and grind the wall rib bonding surfaces with sandpaper. Repeat Step 4 repeatedly until the wall ribs are fitted; Step 5: Clean and bond: Clean the wall ribs after grinding and shaping in Step 4, apply glue on the wall rib bonding surfaces, and bond the panel board with installed wall ribs and the panel board without installed wall ribs.

2. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 1, characterized in that, if the thickness after compression of the pressing piece is greater than 1mm, the wall ribs need to be ground and shaped. If the thickness after compression of the pressing piece is less than 1mm, the wall ribs do not need to be ground and shaped.

3. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 1 or 2, characterized in that, the said pressing piece can be compressed under pressure and does not rebound after the pressure is removed.

4. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 3, characterized in that, in Step 5, the panel board and the wall ribs are bonded with epoxy resin, and polyurethane powder is added to the said epoxy resin.

5. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 3, characterized in that, the said pressing piece is plasticine.

6. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 3, characterized in that, when cleaning the wall ribs, repeatedly wipe with a rag soaked in alcohol or acetone and replace the rag until there is no visible dirty color on the rag.

7. The new method for mold closing of the wing of a wing-in-ground effect ship according to claim 3, characterized in that, the surface of the cleaned wall ribs is prohibited from contacting with unclean things, and is not allowed to be touched by hands, and is placed in a clean environment.

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