Keel attachment fixing method and fixing device

Abstract

The application provides a long string accessory fixing method and fixing device, which comprises the following steps: placing the long string on a profiled tool, with the hat bottom of the long string on both sides upward, and sequentially stacking the accessory and the auxiliary film-removing pulling belt in the cavity of the long string; rolling the adhesive film on the long string, with the adhesive part of the adhesive film being the hat bottom on both sides of the long string, and the back paper of the adhesive film being reserved between the hat bottom on both sides; connecting the auxiliary film-removing pulling belt and the end of the central part of the adhesive film by using the auxiliary adhesive tape; after tearing off the back paper of the adhesive film adhered to the hat bottom on both sides of the long string, adhering the hat bottom on both sides of the long string to the wallboard; and removing the adhesive film and the auxiliary film-removing pulling belt between the hat bottom on both sides by pulling out the auxiliary film-removing pulling belt. The accessory is fixed in the cavity of the long string by the adhesive film. The adhesive film is adhered to the hat bottom on both sides of the long string, but is not adhered to the accessory and the wallboard, which facilitates the removal of the adhesive film between the hat bottom on both sides in the later period, and avoids the sliding of the long string.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aviation manufacturing, and particularly relates to a stringer accessory fixing method and fixing device. BACKGROUND

[0002] In the process of positioning the stringer of an airplane, the accessories placed in the stringer need to be fixed, and the accessories are usually vacuum bags, core molds, etc. There are two common accessory fixing methods in the prior art. One method is to fix the two ends of the accessory to the end of the stringer by means of binding, etc. However, this method will cause the middle part of the accessory to sag, so that the middle part of the accessory is separated from the stringer. The other method is to divide the accessory into multiple sections, and each section of the accessory is fixed to the stringer by means of a separation film. After the positioning of the stringer is completed, the separation film is extracted. However, the extraction of the separation film is likely to cause the stringer to slide.

[0003] Therefore, it is necessary to provide a stringer accessory fixing method and fixing device to solve the above problems. SUMMARY

[0004] The present application aims to provide a stringer accessory fixing method and fixing device to improve the poor fixing effect of the existing accessories and the problem of causing the stringer to slide.

[0005] In a first aspect, the present application provides a stringer accessory fixing method, comprising the following steps: first step: placing the stringer on a random mold, with the hat bottom on both sides of the stringer facing upwards, and sequentially stacking the accessory and the auxiliary tear film extraction tape in the cavity of the stringer. Second step: rolling the adhesive film onto the stringer, wherein the adhesive part of the adhesive film is the hat bottom on both sides of the stringer, and the back paper of the adhesive film between the hat bottom on both sides is reserved. The auxiliary tear film extraction tape and the end of the center part of the adhesive film are connected by means of auxiliary adhesive tape. Third step: after removing the back paper of the adhesive film adhered to the hat bottom on both sides of the stringer, the hat bottom on both sides of the stringer is adhered to the wall plate. Fourth step: removing the adhesive film between the hat bottom on both sides and the auxiliary tear film extraction tape by extracting the auxiliary tear film extraction tape.

[0006] The stringer accessory fixing method provided by the present application has the beneficial effects that the adhesive film is adhered to the hat bottom on both sides of the stringer, the accessory is blocked by the adhesive film, and the accessory is fixed in the cavity of the stringer, thereby enhancing the fixing effect of the accessory. The adhesive film is only adhered to the hat bottom on both sides of the stringer, and the back paper of the adhesive film between the hat bottom on both sides is reserved, so that the adhesive film is not fixed with the accessory and the wall plate, facilitating the removal of the adhesive film between the hat bottom on both sides. When the adhesive film between the hat bottom on both sides is removed, the stringer will not slide because the hat bottom on both sides of the stringer is adhered to the wall plate.

[0007] In a possible embodiment, before placing the stringer on the profiled tool, further comprising: cutting the double-backed adhesive film according to the projected size of the stringer, the width of the double-backed adhesive film being D+2S, wherein D is the width of the stringer and S is the excess of a single side. Before rolling the adhesive film, the adhesive film is cut to the appropriate size according to the projected size of the stringer to facilitate the rolling of the adhesive film.

[0008] In a possible embodiment, after cutting the double-backed adhesive film according to the projected size of the stringer, further comprising: virtually cutting the part to be removed to form a pair of virtual cutting lines in the middle of the double-backed adhesive film, the distance between the pair of virtual cutting lines being equal to the distance d between the inner edges of the hat bottoms on both sides of the stringer. By providing a pair of virtual cutting lines on the double-backed adhesive film, the adhesive film between the hat bottoms on both sides of the stringer is easily removed along the virtual cutting lines.

[0009] In a possible embodiment, before removing the back paper of the adhesive film pasted on the hat bottoms on both sides of the stringer, further comprising: cutting off the excess part of the adhesive film extending out of the stringer. By cutting off the excess part of the adhesive film, the hat bottoms on both sides of the stringer are easily pasted on the wallboard.

[0010] In a possible embodiment, the auxiliary film-removing pulling tape is a fiber tape.

[0011] In a possible embodiment, when the accessory and the auxiliary film-removing pulling tape are sequentially stacked in the cavity of the stringer, the auxiliary film-removing pulling tape is arranged along the length direction of the accessory, both ends of the auxiliary film-removing pulling tape extending out of the accessory, and the first end of the auxiliary film-removing pulling tape being used for pulling.

[0012] Connecting the auxiliary film-removing pulling tape and the end of the central part of the adhesive film by using the auxiliary adhesive tape comprises: connecting the second end of the auxiliary film-removing pulling tape and the end of the central part of the adhesive film by using the auxiliary adhesive tape.

[0013] In a possible embodiment, the accessory can be a vacuum bag or a core mold.

[0014] In a second aspect, the application further provides a stringer accessory fixing device, comprising: a stringer, an accessory, an adhesive film, and a wallboard; the accessory is placed in the cavity of the stringer; one side of the adhesive film is fixedly pasted with the hat bottoms on both sides of the stringer, and the other side is fixedly pasted with the wallboard.

[0015] In the embodiment, the stringer accessory fixing device is formed by the stringer accessory fixing method, and the stringer is fixedly pasted on the wallboard by using the adhesive film.

[0016] In one possible embodiment, the long stringer comprises a crown, a crown waist connected to both sides of the crown, a crown bottom connected to one side of the crown waist away from the crown, a male corner region formed at the connection between the crown and the crown waist, and a female corner region formed at the connection between the crown bottom and the crown waist.

[0017] In one possible embodiment, the size of the adhesive film is equal to the size of the crown bottom on both sides of the long stringer, ensuring that the long stringer is fixed to the wallboard by the adhesive film. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Flow chart of the long stringer accessory fixing method of the present embodiment.

[0019] Figure 2 Schematic diagram of cutting the adhesive film with double backing paper according to the projected size of the long stringer in the long stringer accessory fixing method of the present embodiment.

[0020] Figure 3 Schematic diagram of the long stringer in the long stringer accessory fixing method of the present embodiment.

[0021] Figure 4 Schematic diagram of the adhesive film after virtual cutting in the long stringer accessory fixing method of the present embodiment.

[0022] Figure 5 Schematic diagram of the long stringer placed on the profiled tooling in the long stringer accessory fixing method of the present embodiment.

[0023] Figure 6 Schematic diagram of the accessory and the pull tab for auxiliary film tearing after being stacked in the long stringer accessory fixing method of the present embodiment.

[0024] Figure 7 Schematic diagram of the adhesive film being rolled onto the long stringer in the long stringer accessory fixing method of the present embodiment.

[0025] Figure 8 Cross-sectional view of the adhesive film being rolled onto the long stringer in the long stringer accessory fixing method of the present embodiment.

[0026] Figure 9 Schematic diagram of the pull tab for auxiliary film tearing and the end of the central part of the adhesive film being connected by the auxiliary adhesive tape in the long stringer accessory fixing method of the present embodiment.

[0027] Figure 10 Schematic diagram of the excess part of the adhesive film being cut off in the long stringer accessory fixing method of the present embodiment.

[0028] Figure 11 Schematic diagram of the backing paper of the adhesive film on both sides of the crown bottom being torn off in the long stringer accessory fixing method of the present embodiment.

[0029] Figure 12 Figure 2 is a cross-sectional view of the film backing paper of the hat bottom of the long stringer accessory fixing method of the present embodiment after the film backing paper is removed.

[0030] Figure 13 Figure 3 is a schematic view of the hat bottom of the long stringer accessory fixing method of the present embodiment being adhered to the wallboard.

[0031] Figure 14 Figure 4 is a cross-sectional view of the hat bottom of the long stringer accessory fixing method of the present embodiment being adhered to the wallboard.

[0032] Figure 15 Figure 5 is a schematic view of the long stringer accessory fixing method of the present embodiment when the pull tape for auxiliary film removal is extracted.

[0033] Figure 16 Figure 6 is a cross-sectional view of the long stringer accessory fixing method of the present embodiment when the film between the hat bottoms is removed.

[0034] Figure 17 Figure 7 is a cross-sectional view of the long stringer accessory fixing device of the present embodiment.

[0035] Figure 18 Figure 8 is a schematic view of the long stringer accessory fixing device of the present embodiment. Figure 17 Figure 9 is a partial enlarged schematic view of region A in Figure 8.

[0036] Symbol explanation: film 200; backing paper 201; virtual cutting line 202;

[0037] long stringer 300; hat top 301; hat waist 302; hat bottom 303; male corner region 304; female corner region 305;

[0038] profiled tooling 400;

[0039] accessory 500;

[0040] pull tape for auxiliary film removal 600;

[0041] auxiliary adhesive tape 700;

[0042] wallboard 800. DETAILED DESCRIPTION

[0043] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings thereof by those skilled in the art. The similar words such as "comprise" used herein mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects.

[0044] In the prior art, during the transfer of the longeron, the longeron usually needs to be inverted first, i.e. the hat bottom of the longeron is upward, and the accessory is placed in the cavity of the longeron. Then the longeron needs to be transferred, and the hat bottom of the longeron is pasted and fixed on the wallboard. In order to ensure that the accessory does not fall off during the transfer of the longeron, the accessory is usually fixed by binding or the like. However, there are problems that the accessory is easy to fall off due to the accessory being not fixed firmly, or the longeron is easy to slide after positioning due to the accessory being fixed too firmly when the binding member is removed.

[0045] In view of the problems in the prior art, the embodiments of the present application provide a longeron accessory fixing method, Figure 1 For the flowchart of the longeron accessory fixing method of the present embodiment, see Figure 1 The longeron accessory fixing method comprises the following steps:

[0046] S101, see Figure 5 The longeron 300 is placed on the profiled tooling 400, so that the hat bottoms 303 on both sides of the longeron 300 are upward, see Figure 6 The accessory 500 and the auxiliary film-tearing pulling belt 600 are sequentially stacked in the cavity of the longeron 300.

[0047] S102, see Figure 7 and Figure 8 The adhesive film 200 is rolled and pasted on the longeron 300, wherein the pasting position of the adhesive film 200 is the hat bottoms 303 on both sides of the longeron 300, and the back paper 201 of the adhesive film 200 placed between the hat bottoms 303 is reserved.

[0048] S103, see Figure 9 The end of the center part of the auxiliary film-tearing pulling belt 600 and the adhesive film 200 is connected by using the auxiliary adhesive tape 700.

[0049] S104, see Figures 11 to 14, tear off the back paper 201 of the adhesive film 200 pasted on the hat bottom 303 of the longerons 300, and then paste the hat bottom 303 of the longerons 300 on the wall plate 800.

[0050] S105: refer to Figures 15 to 18 , remove the adhesive film 200 and the auxiliary film-pulling tape 600 between the hat bottoms 303 by pulling out the auxiliary film-pulling tape 600.

[0051] In a preferred embodiment, Figure 2 Fig. 2 is a schematic view of cutting the adhesive film with double back paper according to the projection size of the longerons in the method for fixing the accessories of the longerons of the present embodiment, Figure 3 Fig. 1 is a schematic view of the longerons in the method for fixing the accessories of the longerons of the present embodiment, refer to Figure 2 and Figure 3 Before placing the longerons 300 on the profiled tooling 400, it further includes cutting the adhesive film 200 with double back paper 201 according to the projection size of the longerons 300, and the width of the adhesive film 200 is D+2S, wherein D is the width of the longerons 300, and S is the excess of single side. In this embodiment, the adhesive film 200 is cut to the appropriate size according to the projection size of the longerons 300, on the one hand, the adhesive film 200 of appropriate size can facilitate the roll pasting of the adhesive film 200, on the other hand, it reduces the usage of the adhesive film 200 in fixing the longerons 300, reduces the cost, and avoids the waste of the adhesive film 200.

[0052] In a preferred embodiment, Figure 4 Fig. 2 is a schematic view of cutting the adhesive film with double back paper according to the projection size of the longerons in the method for fixing the accessories of the longerons of the present embodiment, Figure 17 Fig. 1 is a schematic view of the longerons in the method for fixing the accessories of the longerons of the present embodiment, refer to Figure 4 and Figure 17, after cutting the adhesive film 200 with double back paper 201 according to the projection size of the long string 300, further comprising: performing virtual cutting on the part to be removed to form a pair of virtual cutting lines 202 in the middle of the adhesive film 200 with double back paper 201, the distance between the pair of virtual cutting lines 202 is equal to the distance d between the inner edges of the hat bottom 303 on both sides of the long string 300. In this embodiment, the virtual cutting line 202 can be used to conveniently tear off the back paper 201 on both sides of the pair of virtual cutting lines 202 and retain the back paper 201 between the pair of virtual cutting lines 202. When the adhesive film 200 is rolled and attached to the long string 300, the adhesive film 200 on both sides of the pair of virtual cutting lines 202 is fixed on the hat bottom 303 on both sides of the long string 300 respectively, so that the pair of virtual cutting lines 202 are aligned with the inner edges of the hat bottom 303 on both sides respectively, and the adhesive film 200 with double back paper 201 is located between the hat bottom 303 on both sides, thereby avoiding the adhesive film 200 from being fixedly attached to the accessory 500 and the wallboard 800, and avoiding affecting the removal of the adhesive film 200 located between the hat bottom 303 on both sides. By pulling out the auxiliary film tearing pulling belt 600, the adhesive film 200 located between the hat bottom 303 on both sides can be smoothly and conveniently torn along the virtual cutting line 202 and removed along the virtual cutting line 202, thereby avoiding the problem of sliding of the long string 300 during the removal process, and the operation is simpler and more efficient.

[0053] Further, referring to Figure 4 , the virtual cutting line 202 is longitudinally arranged along the length direction of the adhesive film 200 with double back paper 201. The virtual cutting line 202 is a plurality of perforations penetrating the adhesive film 200 with double back paper 201, and the plurality of perforations are distributed at intervals along the arrangement position of the virtual cutting line 202.

[0054] In a specific embodiment, Figure 10 is a schematic diagram of the long string accessory fixing method after the excess part of the adhesive film is removed in this embodiment, referring to Figure 10 , before tearing off the back paper 201 of the adhesive film 200 attached to the hat bottom 303 on both sides of the long string 300, further comprising: cutting off the excess part of the adhesive film 200 extending out of the long string 300. In this embodiment, by cutting off the excess part of the adhesive film 200, the adhesive film 200 can be avoided from affecting the pasting operation of the long string 300.

[0055] In a specific embodiment, the auxiliary film tearing pulling belt 600 is a fiber belt for auxiliary film tearing, which has strong toughness and is not easy to break.

[0056] In a preferred embodiment, Figure 6 is a schematic diagram of the long string accessory fixing method after the accessory and the auxiliary film tearing pulling belt are stacked in this embodiment, referring to Figure 6When the accessory 500 and the auxiliary tear film pulling tape 600 are sequentially stacked in the cavity of the longeron 300, the auxiliary tear film pulling tape 600 is arranged along the length direction of the accessory 500, and the two ends of the auxiliary tear film pulling tape 600 extend out of the accessory 500, and the first end of the auxiliary tear film pulling tape 600 is used for pulling.

[0057] In the embodiment, Figure 9 For the schematic diagram of connecting the auxiliary tear film pulling tape and the end of the central part of the film by the auxiliary adhesive tape in the longeron accessory fixing method of the embodiment, see Figure 9 The auxiliary tear film pulling tape 600 and the end of the central part of the film 200 are connected by the auxiliary adhesive tape 700, including connecting the second end of the auxiliary tear film pulling tape 600 and the end of the central part of the film 200 by the auxiliary adhesive tape 700.

[0058] In the embodiment, Figure 15 For the schematic diagram of pulling out the auxiliary tear film pulling tape in the longeron accessory fixing method of the embodiment, Figure 16 For the sectional view of removing the film placed between the two side cap bottoms in the longeron accessory fixing method of the embodiment, see Figure 15 and Figure 16 By pulling the first end of the auxiliary tear film pulling tape 600, the second end of the auxiliary tear film pulling tape 600 pulls the auxiliary adhesive tape 700 to move in the direction of the first end, and then pulls the film 200 placed between the two side cap bottoms 303 to move in the direction of the first end, so that the film 200 placed between the two side cap bottoms 303 can be easily and smoothly torn off and removed.

[0059] Further, see Figure 9 The auxiliary adhesive tape 700 is in the shape of a triangle, one side of the auxiliary adhesive tape 700 is connected to the end of the central part of the film 200, which increases the contact area between the auxiliary adhesive tape 700 and the film 200, enhances the connection strength, and avoids the problem of the auxiliary adhesive tape 700 and the film 200 being disconnected when the auxiliary tear film pulling tape 600 is pulled.

[0060] In a specific embodiment, the accessory 500 can be a vacuum bag, a core mold.

[0061] The long string accessory fixing method of the present application uses the adhesive film 200 with double back paper 201 to fix the accessory 500, by tearing off the back paper 201 on both sides of the virtual cutting line 202 of the adhesive film 200, and then pasting and fixing the adhesive film 200 on both sides to the cap bottom 303 on both sides of the long string 300, so that the adhesive film 200 covers the cap bottom 303 of the long string 300 and the bottom of the accessory 500, thereby limiting and fixing the accessory 500 in the area enclosed by the adhesive film 200 and the long string 300, greatly improving the reliability of the fixing of the accessory 500, and effectively preventing the accessory 500 from slipping out of the long string 300 during the transfer of the long string 300. Since the back paper 201 of the adhesive film 200 placed between the cap bottom 303 on both sides is retained to separate the adhesive film 200 from the accessory 500 and the wall plate 800 by the back paper 201, the adhesive film 200 placed between the cap bottom 303 on both sides has a virtual cutting line 202 to facilitate tearing off the adhesive film 200 placed between the cap bottom 303 on both sides. Since the cap bottom 303 on both sides of the long string 300 is pasted on the wall plate 800, the long string 300 will not slip during the removal of the adhesive film 200 placed between the cap bottom 303 on both sides. The long string accessory fixing method of the present application is easier to operate and improves the positioning efficiency of the long string 300.

[0062] In the present embodiment, Figure 17 is a sectional view of the long string accessory fixing device of the present embodiment, Figure 18 is Figure 17 is a local enlarged view of area A, see Figure 17 and Figure 18 The present application also provides a long string accessory fixing device formed by the long string accessory fixing method, comprising: a long string 300, an accessory 500, an adhesive film 200, and a wall plate 800; the accessory 500 is placed in the cavity of the long string 300; one side of the adhesive film 200 is pasted and fixed with the cap bottom 303 on both sides of the long string 300, and the other side is pasted and fixed with the wall plate 800.

[0063] In a specific embodiment, see Figure 3 , Figure 5 and Figure 17 The long string 300 comprises a cap top 301, a cap waist 302 connected to both sides of the cap top 301, a cap bottom 303 connected to the side of the cap waist 302 away from the cap top 301, a male corner domain 304 formed at the connection between the cap top 301 and the cap waist 302, and a female corner domain 305 formed at the connection between the cap bottom 303 and the cap waist 302.

[0064] In a specific embodiment, see Figure 17The size of the adhesive film 200 is equal to the size of the hat bottom 303 of the long stringer 300. In this embodiment, the adhesive film 200 with equal size is arranged on the hat bottom 303 of the long stringer 300 to ensure that the long stringer 300 is firmly and sufficiently adhered to the wall plate 800, and the bonding strength between the long stringer 300 and the wall plate 800 is enhanced to avoid the slippage of the long stringer 300.

[0065] In this embodiment, the positioning process of the long stringer is described in detail below in combination with the drawings. Referring to Figure 2 and Figure 3 The adhesive film 200 with double back paper 201 is cut according to the projected size of the long stringer 300. The width of the adhesive film 200 is D+2S, wherein D is the width of the long stringer 300, and S is the single side allowance. Referring to Figure 4 The virtual cutting is performed on the part to be removed to form a pair of virtual cutting lines 202 in the middle of the adhesive film 200 with double back paper 201. The distance d between the pair of virtual cutting lines 202 is equal to the distance between the inner edges of the hat bottom 303 of the long stringer 300. Referring to Figure 5 The long stringer 300 is placed on the random tooling 400 with the hat bottom 303 of the long stringer 300 facing upward. Referring to Figure 6 The accessory 500 and the auxiliary film tearing pulling tape 600 are sequentially stacked in the cavity of the long stringer 300. The auxiliary film tearing pulling tape 600 is arranged along the length direction of the accessory 500. The two ends of the auxiliary film tearing pulling tape 600 extend out of the accessory 500. The first end of the auxiliary film tearing pulling tape 600 is used for pulling. Referring to Figure 7 and Figure 8 The adhesive film 200 is rolled and adhered to the long stringer 300. The adhered part of the adhesive film 200 is the hat bottom 303 of the long stringer 300. The pair of virtual cutting lines 202 are respectively aligned with the inner edges of the hat bottom 303. The back paper 201 of the adhesive film 200 between the hat bottom 303 is reserved. Referring to Figure 9 The second end of the auxiliary film tearing pulling tape 600 and the end of the central part of the adhesive film 200 are connected by the auxiliary adhering tape 700. Referring to Figure 10 The excess part of the adhesive film 200 extending out of the long stringer 300 is cut off. Referring to Figure 11 and Figure 12 The back paper 201 of the adhesive film 200 adhered to the hat bottom 303 of the long stringer 300 is torn off. Referring to Figure 13 and Figure 14 The hat bottom 303 of the long stringer 300 is adhered to the wall plate 800 according to the setting position of the long stringer 300. Referring to Figures 15 to 17, by pulling the first end of the auxiliary film-removing pulling tape 600, the auxiliary film-removing pulling tape 600 pulls the auxiliary adhesive tape 700 to move in the direction of the first end, and then pulls the film 200 between the two cap bottoms 303 to move in the direction of the first end, so as to remove the film 200 between the two cap bottoms 303, the auxiliary film-removing pulling tape 600 and the auxiliary adhesive tape 700. The long web 300 is compacted.

[0066] While the embodiments of the application have been illustrated and described in detail, it will be readily apparent to those skilled in the art that various modifications and changes can be made to the embodiments without departing from the scope and spirit of the application as described in the claims. Moreover, the application described is not limited to the particular embodiments described. Rather, the application described can be carried out in other ways, equivalents, and in other technologies. Therefore, the application described is to be understood based on the claims that follow.

Claims

1. A longeron attachment fixing method characterized by, The method comprises the following steps: placing the long string on a random tooling, with the hat bottom of the long string on both sides upward, and sequentially stacking the accessories and the auxiliary film-pulling tape in the cavity of the long string; rolling the adhesive film on the long string, wherein the adhesive part of the adhesive film is the hat bottom on both sides of the long string, and the back paper of the adhesive film between the hat bottom on both sides is reserved; connecting the auxiliary film-pulling tape and the end of the central part of the adhesive film by using the auxiliary adhesive tape; after tearing off the back paper of the adhesive film adhered to the hat bottom on both sides of the long string, adhering the hat bottom on both sides of the long string on the wallboard; removing the adhesive film between the hat bottom on both sides and the auxiliary film-pulling tape by pulling out the auxiliary film-pulling tape; after cutting the adhesive film with double back paper according to the projection size of the long string, further comprising: virtually cutting the to-be-removed part to form a pair of virtual cutting lines in the middle part of the adhesive film with double back paper, and the interval of the pair of virtual cutting lines is equal to the interval d of the inner edges of the hat bottom on both sides of the long string.

2. The method of claim 1, wherein Before placing the long string on the random tooling, further comprising: cutting the adhesive film with double back paper according to the projection size of the long string, and the width of the adhesive film is D+2S, wherein D is the width of the long string, and S is the excess of a single side.

3. The method of claim 1, wherein Before tearing off the back paper of the adhesive film adhered to the hat bottom on both sides of the long string, further comprising: cutting off the excess part of the adhesive film extending out of the long string.

4. The longeron attachment fixing method according to claim 1, characterized by The auxiliary film-pulling tape is a fiber tape.

5. The method of claim 1 or 4, wherein When sequentially stacking the accessories and the auxiliary film-pulling tape in the cavity of the long string, the auxiliary film-pulling tape is arranged along the length direction of the accessories, the two ends of the auxiliary film-pulling tape extend out of the accessories, and the first end of the auxiliary film-pulling tape is used for pulling. Connecting the auxiliary film-pulling tape and the end of the central part of the adhesive film by using the auxiliary adhesive tape comprises: connecting the second end of the auxiliary film-pulling tape and the end of the central part of the adhesive film by using the auxiliary adhesive tape.

6. The method of attaching a longeron according to claim 1, wherein The accessories are vacuum bags and core molds.

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