CN113232310B

CN113232310B - Glue joint method of aluminum honeycomb structural member

Info

Publication number: CN113232310B
Application number: CN202110644639.3A
Authority: CN
Inventors: 于海蛟; 王逾涯; 蔡良元; 郭仁伟; 宋旻键; 陈子豪
Original assignee: Aviation Army Institute People's Liberation Army Air Force Research Institute
Current assignee: Aviation Army Institute People's Liberation Army Air Force Research Institute
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2023-05-16
Anticipated expiration: 2041-06-09
Also published as: CN113232310A

Abstract

The invention provides a cementing method of an aluminum honeycomb structural member, which sequentially comprises the following steps: 1) Pretreating a piece to be glued in an aluminum honeycomb structural member to obtain a pretreated piece; 2) Performing first verification processing on the pre-processed piece to obtain first verification information; 3) Performing first repair treatment on the pretreatment piece according to the first verification information to obtain a first repair piece; 4) Performing first assembly treatment on the first repair part to obtain a first assembly part; 5) Disassembling the first assembly part to obtain a lower skin and a first disassembled part; 6) Performing second check-up processing on the lower skin to obtain second check-up information; 7) Performing second repair treatment on the lower skin according to the second verification information to obtain a second repair part; 8) Performing second assembly treatment on the first disassembly piece and the second assembly piece to obtain a second assembly piece; 9) And performing gluing treatment on the second assembly part to obtain a gluing part. The aluminum honeycomb structural member prepared by the bonding method has the advantages of good bonding quality and difficult degumming.

Description

Glue joint method of aluminum honeycomb structural member

Technical Field

The invention belongs to the technical field of composite material bonding, and relates to a bonding method of an aluminum honeycomb structural member.

Background

The aluminum honeycomb structural member has the advantages of light weight, high specific strength and specific rigidity, fatigue aging resistance, sound insulation, noise reduction, good heat insulation performance and the like, and is widely applied to aircraft structures, and the main application parts comprise flaps, horizontal tails, vertical tails and the like.

The aluminum honeycomb structural member is generally formed by connecting an upper layer of skin, a lower layer of skin and a honeycomb core lattice structure through glue layers, wherein the upper layer of skin and the lower layer of skin are respectively connected with the honeycomb core lattice structure through glue layers. Along with the increase of service life, the aluminum honeycomb structural part is extremely easy to have functional faults such as degumming and the like due to the combined action of various factors such as natural environment, mechanics and the like in the process of repeatedly executing tasks by an airplane, so that the development of the aluminum honeycomb structural part gluing method with excellent gluing quality has important significance.

Disclosure of Invention

The invention provides a cementing method of an aluminum honeycomb structural member, which is simple and easy to operate, and the aluminum honeycomb structural member prepared by the cementing method has the advantages of good cementing quality and difficult degumming.

The invention provides a gluing method of an aluminum honeycomb structural member, which sequentially comprises the following steps:

1) Pretreating a piece to be glued in an aluminum honeycomb structural member to obtain a pretreated piece;

2) Performing first verification processing on the preprocessing piece to obtain first verification information;

3) Performing first repair treatment on the pretreatment piece according to the first verification information to obtain a first repair piece;

4) Performing first assembly treatment on the first repairing piece to obtain a first assembly piece;

5) Disassembling the first assembly part to obtain a lower skin and a first disassembled part;

6) Performing second check processing on the lower skin to obtain second check information;

7) Performing second repair treatment on the lower skin according to the second verification information to obtain a second repair part;

8) Performing second assembly treatment on the first disassembly piece and the second repair piece to obtain a second assembly piece;

9) And performing gluing treatment on the second assembly part to obtain a gluing piece.

The bonding method as described above, wherein said performing a first assembly process on said first repair, obtaining a first assembly comprises: heating part of the first repair parts by using a hot air gun to obtain first heating parts; performing adhesive film paving treatment on the surface of the first heating piece to obtain an adhesive film paving piece; and fixing the adhesive film paving piece and the residual first repairing piece in the gluing die to obtain the first assembly.

The bonding method as described above, wherein the temperature of the heat treatment is 95-100 ℃.

A method of cementing as described above, wherein the pre-treatment comprises: according to the piece to be glued, a first single-layer rubber and a second single-layer rubber are respectively obtained; adhering the first single-layer rubber and the second single-layer rubber to the first end face and the second end face of the piece to be glued respectively to obtain a piece to be polished; and polishing the workpiece to be polished to obtain the pretreatment piece.

A method of cementing as described above, wherein the pre-treatment comprises: and cleaning the to-be-glued piece by using acetone to obtain the pretreatment piece.

The bonding method as described above, wherein, before the first fitting process, further comprising performing a post-process on the first repair, the post-process comprising an oxide film removal process and an oil removal process.

The bonding method further comprises the step of carrying out glue layer coating treatment on the treated piece after the oxide film removing treatment.

The bonding method as described above, wherein the first verification is performed using an oven or autoclave.

The bonding method as described above, wherein the second repair treatment includes: and pasting and repairing the lower skin by adopting an adhesive film, a foaming adhesive and an epoxy resin-based prepreg to obtain the second repairing part.

The bonding method as described above, wherein the second fitting member and the first disassembly member are fixed inside the bonding mold, resulting in the second fitting member.

The gluing method provided by the invention has the advantages of simplicity and easiness in operation, and each part in the glued aluminum honeycomb structural part can be ensured to be more accurate through twice verification, so that the glued aluminum honeycomb structural part has the advantages of good gluing quality and difficulty in degumming.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

2) Performing first verification processing on the pre-processed piece to obtain first verification information;

4) Performing first assembly treatment on the first repair part to obtain a first assembly part;

6) Performing second check-up processing on the lower skin to obtain second check-up information;

8) Performing second assembly treatment on the first disassembly piece and the second assembly piece to obtain a second assembly piece;

9) And performing gluing treatment on the second assembly part to obtain a gluing part.

The to-be-glued piece in the preparation method at least comprises a beam core block, a main beam, an upper skin, a lower skin, end ribs, a trailing edge strip and a honeycomb core, and in a specific implementation process, a corresponding pretreatment method can be selected according to different materials and shapes of the to-be-glued piece to pretreat the to-be-glued piece.

The pretreatment piece comprises an upper skin, a honeycomb core, end ribs, a main beam and a lower skin after pretreatment, specifically, a first verification treatment can be carried out on the pretreatment piece by adopting a verification film, information fed back on the verification film is first verification information, a first fitting piece can be obtained after the pretreatment piece is repaired according to the first verification information, then the first fitting piece is placed on a gluing mold to be assembled, the first fitting piece can be obtained, the lower skin in the first fitting piece is removed for enabling each part in the aluminum honeycomb structural part before gluing to be more accurate, a second verification treatment is carried out on the lower skin by using the verification film, a second repair treatment is carried out on the lower skin according to second verification information fed back by the verification film, a second repair piece can be obtained after repair, the second repair piece is reassembled with the first repair piece, the second fitting piece is obtained, and the gluing treatment is carried out on the second fitting piece, so that the gluing piece is obtained. And after the cementing is finished, removing the end ribs and the main beams, and separating the cementing piece from the die to obtain the aluminum honeycomb structural member.

In a specific embodiment, the pretreatment in step 1) comprises: according to the piece to be glued, a first single-layer rubber and a second single-layer rubber are respectively obtained; adhering a first single-layer rubber and a second single-layer rubber to a first end face and a second end face of a piece to be glued respectively to obtain a piece to be polished; and polishing the workpiece to be polished to obtain a pretreated workpiece.

The pretreatment operation is suitable for the situation when the piece to be glued is a beam core block, and before the pretreatment of the beam core block, the pretreatment operation further comprises the step of paving an isolating film on the surface of the gluing die, wherein the isolating film is paved at a position 20-30 mm away from the edge of the gluing die.

And (3) paving a layer of double-sided adhesive tape on the first end surface of the beam core block, which is not adhered with the isolating film, adhering a first single-layer rubber on the double-sided adhesive tape, paving a layer of double-sided adhesive tape on the second end surface of the beam core block, and adhering a second single-layer rubber on the double-sided adhesive tape to obtain the piece to be polished.

The first end face refers to an end face of the beam core block, which is contacted with the upper edge strip of the main beam, the second end face refers to an end face of the beam core block, which is contacted with the lower edge strip of the main beam, the first single-layer rubber and the second single-layer rubber are the same in material, and the first single-layer rubber and the second single-layer rubber are required to be cut according to the outline of the beam core block before being used, so that the size of the first single-layer rubber and the second single-layer rubber are consistent with the size of the beam core block.

And then, polishing the workpiece to be polished, namely uniformly polishing the outer surfaces of the first single-layer rubber and the second single-layer rubber by adopting dry abrasive paper until the beam core block can be plugged into the main beam without shaking, so that the pretreatment of the beam core block is finished, and the pretreated workpiece is obtained.

In a specific embodiment, the pretreatment in step 1) further comprises: and cleaning the to-be-glued piece by using acetone to obtain a pretreated piece. When the to-be-glued piece is the main beam, the upper skin, the lower skin, the end ribs, the rear edge strips and the honeycomb core, the pretreatment operation can be adopted, the acetone is used for cleaning the to-be-glued piece, oil stains on the surface of the to-be-glued piece can be removed, and the parts can be glued more firmly in subsequent gluing.

When the first calibration is carried out on the pretreated piece, the calibrated pretreated piece comprises an upper skin, a honeycomb core, an end rib, a main beam and a lower skin, and the specific process is that the upper skin, a calibration film, F4 cloth, gauze (only plate-plate area), the honeycomb core, the end rib, the main beam, F4 cloth, gauze (only plate-plate area), the calibration film and the lower skin are sequentially paved on a gluing mold, the gluing mold is packaged and then is put into an oven or an autoclave for calibration, after the calibration is finished, packaging materials are removed, the calibration film is taken down, the pretreated piece is separated from the mold, and the pretreated piece is repaired according to first calibration information fed back on the calibration film, so that the first repair piece can be obtained.

After the first repair part is obtained, the first repair part can be placed in a cementing mold for assembly, and before the assembly, the first repair part is required to be subjected to post-treatment, wherein the post-treatment comprises oxide film removal treatment and oil removal treatment.

When the first repair parts are the upper skin, the lower skin, the end ribs and the main beams made of metal, the oxide film on the first repair parts can be removed through phosphoric acid anodizing.

After the oxide film on the first repair member is removed, it is also necessary to apply a glue layer coating treatment to the treated first repair member. Specifically, the primer can be sprayed on the bonding surfaces of the upper skin, the lower skin, the end ribs and the main beams after the oxide film is removed, the bonding surfaces can be protected from continuous oxidation by spraying the primer, meanwhile, the bonding surfaces are prevented from being polluted by dirt in air, and the primer is sealed and stored by using a vacuum bag after being sprayed.

When the first repair part is a honeycomb core, the post-treatment is oil removal treatment of the honeycomb core. The specific operation position is that acetone is poured into a honeycomb cleaning tank, the depth is not less than 10mm, the glued joint surface of the honeycomb core is immersed into the acetone for 5-6min, the honeycomb core is taken out and dried, the oil removal treatment can be completed, and the honeycomb core is sealed and stored by a vacuum bag after the oil removal is completed.

After finishing the first repair part, the first repair part can be subjected to first assembly treatment, wherein the first assembly treatment comprises the following steps: heating part of the first repair parts by using a hot air gun to obtain first heating parts; spreading an adhesive film on the surface of the first heating piece to obtain an adhesive film spreading piece; and fixing the adhesive film paving piece and the rest first repairing piece in the gluing die to obtain a first assembly.

The first repair part comprises an upper skin, an end rib and a main beam, and is specifically operated to heat the bottom glue spraying surfaces of the upper skin, the end rib and the main beam by using a hot air gun to obtain a first heating part, the upper skin, the end rib and the main beam can be fixed by using rivets before the glue film is paved on the first heating part, glue films are paved on the glue joint surface of the upper skin, the glue joint surface of the end rib and the glue joint surface of the rear edge strip after the fixing, foaming glue is paved on the rear end surface of the honeycomb core, the upper skin, the rear edge strip, the main beam, the end rib and the honeycomb core are fixed on a glue joint die for assembly, and besides the components, the first assembly part also comprises an outer end rib core die and an inner end rib core die for assembly, and the first assembly part is obtained after the assembly is completed.

And heating the primer spraying surfaces of the upper skin, the end ribs and the main beams by using a hot air gun between the adhesive spreading films, so that the adhesive film can be spread on the primer spraying surfaces conveniently, and the adhesive film is spread without bubbles.

Furthermore, when the temperature of the heating treatment of the hot air gun is 95-100 ℃, the adhesive film is paved on the primer spraying surface, so that the adhesive film paving surface has better air tightness.

After the first assembly is obtained, the first assembly is packaged and placed in an oven or autoclave for pre-bonding. The specific operation of pre-adhesion is as follows: vacuumizing the vacuum bag to make the vacuum degree not more than-0.098 MPa and the autoclave pressure + (0-0.06) MPa, and controlling the temperature of the die to rise from room temperature to room temperature

Preserving heat for 60-65min, cooling to below 60 ℃, releasing pressure in the vacuum tank to 0, and stopping. And removing the vacuum source and keeping the vacuum state. In the whole process, the air temperature is not more than 100 ℃, the heating rate is not more than 1.5 ℃/min, and the cooling rate is not more than 1 ℃/min.

After pre-bonding, unpacking, disassembling the first assembly part to obtain a lower skin and a first disassembled part, performing second verification on the lower skin, and similarly, performing second verification on the lower skin by using a verification film, and performing second repair treatment on the lower skin according to second verification information fed back on the lower skin to obtain a second repaired part.

The first and second checking methods are the same, and concretely, the parts to be checked are placed in an oven or an autoclave, the vacuum bag is vacuumized, the vacuum degree is not more than-0.098 MPa, the autoclave pressure + (0-0.06) MPa, and the temperature of the die is controlled to rise from room temperature to room temperature

Preserving heat for 30-65 min, cooling to below 70 ℃, releasing pressure in the vacuum tank to 0, cooling to 60 ℃ by air cooling, and stopping. And removing the vacuum source and keeping the vacuum state. In the whole process, the air temperature is not more than 100 ℃, the heating rate is not more than 1.5 ℃/min, and the cooling rate is not more than 1 ℃/min.

Further, the second repairing treatment comprises repairing the lower skin by adopting an adhesive film, a foaming adhesive and an epoxy resin-based prepreg, and thus the second repairing part can be obtained.

After the lower skin is repaired, the second repair part and the first disassembly part are fixed inside the gluing mold, and the second assembly part can be obtained. The concrete operation is that glue film is evenly spread on the glue joint surface of the lower skin, the glue film is unpacked after encapsulation and compaction, the lower skin is spread on the honeycomb core, and the rivet removed before is recovered, so that the second assembly part is obtained.

And then placing the second assembly part into an autoclave for gluing, so as to obtain a glued part. Wherein the concrete operation of the cementing is as follows: vacuum bag is internally vacuumizedEmpty, making the vacuum degree not more than-0.03 MPa, the autoclave pressure + (0.02-0.06) MPa, and unloading vacuum to 0 according to the vacuum leakage rate not more than 0.01 MPa/min; the pressure in the tank is increased to plus (0.09-0.16) MPa, and the air temperature is not higher than 135 ℃ when the pressurization is completed. Air temperature

Preserving heat for 0-2 h, heating to +.>

Preserving heat for 3-4 hours. Cooling to below 70 ℃, releasing the pressure in the vacuum tank to plus (0.02-0.06) MPa, vacuumizing to above-0.08 MPa at a vacuumizing rate of not more than 0.01MPa/min, releasing the pressure to 0, cooling to 60 ℃ and stopping the machine. And removing the vacuum source and keeping the vacuum state. In the whole process, the air temperature is not more than 190 ℃, the heating rate is not more than 1.5 ℃/min, and the cooling rate is not more than 1 ℃/min. And after the bonding is finished, removing the end ribs and Liang Gongzhuang, and separating the bonding piece from the bonding mold to obtain the aluminum honeycomb structural member.

Hereinafter, the bonding method of the aluminum honeycomb structural member of the present invention will be further described by way of specific examples.

Example 1

The embodiment provides a gluing method of an aluminum honeycomb structural member, which sequentially comprises the following steps:

1) Cleaning dirt on the surface of a cementing mold, dipping acetone into the dirt to wipe the surface of the cementing mold, paving an isolating film A005 on the surface of the cementing mold after removing oil stains on the surface, paving the isolating film to a position 20-30 mm away from the edge of the cementing mold, butt-jointing the joints, compacting, removing bubbles, paving an airfelt and a vacuum bag on the surface of the cementing mold in sequence for packaging, vacuumizing after packaging, keeping the vacuum degree at not lower than-0.08 MPa, keeping the time at not lower than 1h, compacting, and removing packaging materials after compacting.

2) Respectively placing the first end face and the second end face of the beam core block, which are not stuck with A005, on vulcanized AIRPAD single-layer rubber, cutting the single-layer rubber according to outer contour cutting, respectively paving a layer of double-sided adhesive tape on the first end face and the second end face of the beam core block, which are not stuck with A005, after cutting, paving and compacting the cut single-layer rubber, sequentially paving an airfelt and a vacuum bag on the surface of the beam core block for packaging after compacting, vacuumizing after packaging, keeping the vacuum degree at not lower than-0.08 MPa, compacting for not less than 1h, and removing packaging materials after compacting;

taking out the girder, dipping acetone into the girder, wiping the surface of the girder to remove oil stains on the surface, uniformly polishing the single-layer rubber outer surfaces of the first end surface and the second end surface of Liang Xinkuai by adopting dry abrasive paper until the girder core blocks are plugged into the girder without shaking, namely finishing the pretreatment work of the girder core blocks, dipping acetone into the gauze to wipe the Liang Xin surfaces after finishing, removing surface dirt, removing A005 paved on the surfaces of the girder core blocks, integrally paving A005 on the first end surface, the second end surface and the inner surface of the girder core blocks, and compacting;

and taking out the upper skin, the lower skin, the end ribs, the rear edge strips and the honeycomb core, dipping acetone into gauze to wipe the surface, removing oil stains on the surface, and finishing pretreatment before verification.

3) An upper skin, a check film, F4 cloth, gauze (only plate-plate area), a honeycomb core, end ribs, a girder, F4 cloth, gauze (only plate-plate area), a check film and a lower skin are sequentially laid on the cementing mold. F4 cloth, non-porous A4000, airfelt and a vacuum bag are sequentially laid on the surface of the lower skin for packaging. After packaging, placing the packaging material into an autoclave for verification, wherein the verification method comprises the following steps: and arranging vacuum nozzles at two ends of the workpiece in the length direction, wherein the distance between the workpiece and the tank door/wall is not less than 1m, vacuumizing, checking air tightness, adopting a vacuum gauge to detect when vacuum is blocked, and adopting a mark to stroke the position of a vacuum gauge pointer, wherein the position of the gauge pointer is required to be visually checked within 10 minutes. Vacuumizing in a vacuum bag to ensure that the vacuum degree is not more than-0.098 MPa and the autoclave pressure + (0-0.06) MPa, and controlling the temperature of the die to rise from room temperature to room temperature

Preserving heat for 30-65 min, cooling to below 70 ℃, releasing pressure in the vacuum tank to 0, cooling to 60 ℃ by air cooling, and stopping. And removing the vacuum source and keeping the vacuum state. Air temperature in the whole processThe temperature is not higher than 100 ℃, the heating rate is not higher than 1.5 ℃/min, and the cooling rate is not higher than 1 ℃/min. After the verification is completed, removing the packaging material, taking down the verification film, separating each component from the cementing mold, and repairing each component according to the feedback information of the verification film.

4) Pouring acetone into a honeycomb cleaning tank to a depth of not less than 10mm, immersing the glued honeycomb surface into the acetone, keeping for 5-6min, taking out, drying by an electric hair drier, coating the honeycomb core with F4 cloth, and sealing by a vacuum bag;

and (3) carrying out phosphoric acid anodizing treatment on the upper skin, the lower skin, the end ribs and the main beam, transferring the upper skin, the lower skin, the end ribs and the main beam to a cleaning room within 2 hours after the treatment is finished, spraying J-117 primer on the bonding surfaces of the upper skin, the lower skin, the end ribs and the main beam, covering A4000 after the primer spraying is finished by using F4 cloth, and sealing by using a vacuum bag.

5) After dipping acetone again with gauze, wiping the surface of the cementing mold, removing oil stains on the surface, and taking out the J-116A adhesive film from the refrigerator (thickness specification: 0.35 mm), J-116B film (thickness specification: 0.15 mm), J-118 (thickness gauge: 1 mm) foaming glue and J-60 foaming powder, and standing for 6 hours at room temperature; removing the starting end and the virtual edges on two sides of the adhesive film until visual uniformity is achieved; setting the temperature of the hot air gun to be 95-100 ℃, enabling the air outlet to be opposite to the primer spraying surface of the upper skin, the end ribs and the main beam, enabling the distance to be 50-100mm, moving at a speed of 1.5-2.0m/min, and fully covering and blowing; according to the original hole position, connecting angle pieces of a main girder and an auxiliary joint are riveted by using 6X 12GB868-LY10, angle pieces of the main girder are riveted by using 5.5X 8GB868-LY10, and angle pieces of an end rib of the main joint are riveted by using 5X 8GB868-LY 10; uniformly paving a J-116A adhesive film on the adhesive bonding surface of the upper skin, uniformly paving a J-116B adhesive film on the adhesive bonding surface of the rear edge strip and the end rib, and uniformly paving a J-118 on the rear end surface of the honeycomb, compacting and removing bubbles;

f4 cloth, a hole-free A4000, an airfelt and a vacuum bag are sequentially paved on the surfaces of the upper and lower skins, the main beam and the rear edge strip for encapsulation. After packaging, vacuumizing, wherein the vacuum degree is not lower than-0.092 MPa, feeding into an autoclave, preserving heat for 60-65min at the air temperature of 80-85 ℃, taking out after the air temperature is reduced to below 60 ℃, and compacting at the air temperature rising rate of not more than 1.5 ℃/min and the air temperature reducing rate of not more than 1 ℃/min;

placing an upper skin on a gluing mold, positioning by means of 5 positioning holes, inserting 3M 3 x 14 aluminum rivets to fix the upper skin, removing three positioning aluminum rivets of the upper skin, placing a rear edge strip on the upper skin according to the 5 positioning holes, inserting 5M 3 x 14 aluminum rivets to fix the positioning holes, assembling a beam core block and a main beam, fixing 12 rivets with 4mm, placing the main beam on the upper skin, fixing 12M 4 x 12 rivets and 2M 6 x 12 rivets, assembling a front beam outer cover, removing 1 positioning aluminum rivet adjacent to the rear edge strip and an inner side end rib, placing an end rib on the upper skin, inserting 3M 3 x 8 aluminum rivets to fix the positioning holes, assembling an inner rib core mold on the end rib, locking a positioning tool, removing 1 positioning aluminum rivet adjacent to the edge strip and the outer side end rib, placing 3M 3 x 8 aluminum rivets to fix the end rib on the positioning holes, placing 3M 3 x 8 aluminum rivets on the positioning holes, and assembling the outer core mold on the positioning rib;

and (3) according to the feedback of the check film, adopting J-116A, J-118 and 180 ℃ cured glass/quartz fiber reinforced high-temperature epoxy resin-based prepreg to paste an upper skin, laying a honeycomb between a rear edge strip and an end rib, dismantling inner and outer end rib core molds and the end rib, respectively paving a layer of J-118 foaming glue on a side honeycomb core, recovering the end rib, recovering the inner and outer rib core molds, assembling an end rib outer cover, visually checking whether gaps exist between J-118 around the honeycomb and the rear edge strip and between the end rib, and if so, adopting J-60 to fill in.

6) F4 cloth, 4 layers of EW200, nonporous A4000, edge airfelt and a vacuum bag are sequentially paved on the surface, and pre-adhesion packaging is carried out. And after packaging, placing the packaging material into an autoclave for pre-bonding, wherein vacuum nozzles are arranged at two ends of the length direction of a workpiece, the distance between the workpiece and the tank door/tank wall is not less than 1m, vacuumizing, checking air tightness, and detecting by a vacuum meter when vacuum is blocked, and drawing the position of a vacuum meter pointer by adopting a mark, wherein the position of the gauge pointer is required to be visually detected within 10 min. Vacuumizing in a vacuum bag to ensure that the vacuum degree is not more than-0.098 MPa and the autoclave pressure + (0-0.06) MPa, and controlling the temperature of the die to rise from room temperature to room temperature

Preserving heat for 60-65min, cooling to below 60 ℃,the pressure in the vacuum tank is released to 0, and the machine is stopped. And removing the vacuum source and keeping the vacuum state. In the whole process, the air temperature is not more than 100 ℃, the heating rate is not more than 1.5 ℃/min, and the cooling rate is not more than 1 ℃/min.

7) After pre-bonding is completed, removing packaging materials such as F4 cloth, 4 layers of EW200, non-porous A4000, edge airfelt, vacuum bags and the like, sequentially laying F4 cloth, gauze (only plate-plate area), check film and lower skin on the surface of the pre-bonded integral part, and sequentially laying F4 cloth, non-porous A4000, airfelt and vacuum bags on the surface of the lower skin for packaging. After packaging, placing the packaging material into an autoclave for verification, wherein the verification method is the same as that in the step 3), removing packaging materials after the verification is completed, taking down a verification film, separating a lower skin from a cementing mold, and repairing the lower skin by adopting J-116A, J-118 and 180 ℃ cured glass/quartz fiber reinforced high-temperature epoxy resin-based prepreg according to the feedback of the verification film;

taking out the J-116A adhesive film (thickness specification: 0.35 mm) from the refrigerator after finishing the repair work of the lower skin, and standing at room temperature for 6 hours; removing the starting end and the virtual edges on two sides of the adhesive film until visual uniformity is achieved; removing packaging materials such as F4 cloth, nonporous A4000, airfelt, vacuum bag and the like, taking down the lower skin, uniformly paving J-116A adhesive film on a cementing surface adhesive film of the lower skin, sequentially paving F4 cloth, nonporous A4000, airfelt and vacuum bag on the surface of the lower skin after finishing paving, packaging, vacuumizing and compacting, placing into an autoclave, preserving heat for 60-65min at the air temperature of 80-85 ℃, and taking out after the heat is preserved for 60-65min, wherein the air temperature rising rate is not more than 1.5 ℃/min, and the air temperature dropping rate is not more than 1 ℃/min; and (3) removing packaging materials, laying a lower skin on the honeycomb core, recovering the removed aluminum rivets, finishing secondary assembly, and sequentially laying F4 cloth, nonporous A4000, airfelt and a vacuum bag on the outer surface of the lower skin after the assembly is finished, so as to perform packaging.

8) Placing the packaged bonding mold into an autoclave for bonding, wherein vacuum nozzles are arranged at two ends of a workpiece in the length direction, the distance between the workpiece and the tank door/wall is not less than 1m, vacuumizing, checking air tightness, and detecting with a vacuum meter and recordingThe gauge needle position of the gauge needle is determined by visual inspection within 10 minutes. Vacuumizing in the vacuum bag to ensure that the vacuum degree is not more than-0.03 MPa, the autoclave pressure + (0.02-0.06) MPa, and discharging the vacuum to 0 according to the vacuum leakage rate not more than 0.01 MPa/min; the pressure in the tank is increased to plus (0.09-0.16) MPa, and the air temperature is not higher than 135 ℃ when the pressurization is completed. Air temperature

Preserving heat for 0-2 h, heating to +.>

Preserving heat for 3-4 hours. Cooling to below 70 ℃, releasing the pressure in the vacuum tank to plus (0.02-0.06) MPa, vacuumizing to above-0.08 MPa at a vacuumizing rate of not more than 0.01MPa/min, releasing the pressure to 0, cooling to 60 ℃ and stopping the machine. And removing the vacuum source and keeping the vacuum state. In the whole process, the air temperature is not more than 190 ℃, the heating rate is not more than 1.5 ℃/min, and the cooling rate is not more than 1 ℃/min.

9) And after the gluing is finished, removing packaging materials such as F4 cloth, non-porous A4000, airfelt, vacuum bags and the like, dismantling the tooling of the end ribs and the main beams, cleaning the surfaces of the components, and separating the gluing piece from the gluing mould after the glue tumors formed by vacuumizing and pressurizing overflow, so as to obtain the aluminum honeycomb structural member.

Test examples

The aluminum honeycomb structure obtained in example 1 was subjected to the following parameters:

1. appearance quality detection

The detection method comprises the following steps: visual inspection of the appearance of aluminum honeycomb structures required (1) that the panel not be allowed to crease and bulge, not be allowed to present sharp edges or wrinkles and to have abrupt changes in the surrounding run; (2) The depth of the panel indentation and scratch is not more than the deviation under the thickness tolerance of the plate, and the indentation and scratch not more than the depth allows smooth trimming and elimination; (3) The diameter of the panel dent is not more than 38mm, and the depth is not more than 0.15mm; the total area of the dents accounts for not more than 0.5 percent of the total area of the adhesive joint; the minimum distance between the centers of the two dents is not less than 150mm; the distance between the dent center and the edge of the solid part is not less than 250mm; (4) the height of the step difference/the length of the step of the panel is less than or equal to 0.15.

The detection result is as follows: and (5) qualified.

2. Film attachment degree detection

The detection method comprises the following steps: and placing the aluminum honeycomb structural part on a die, adjusting to the corresponding position, applying pressure which is not more than 50N, and measuring the die attaching degree of the aluminum honeycomb structural part from the edge by adopting a feeler gauge.

The detection result is as follows: and (5) qualified.

3. Glue quality detection

The detection method comprises the following steps: full-coverage cementing quality detection for aluminum honeycomb structural component by adopting ultrasonic detector

The detection result is as follows: and (5) qualified.

4. Internal quality detection

The detection method comprises the following steps: and adopting an X-ray detector to carry out full-coverage internal quality detection on the aluminum honeycomb structural member.

The detection result is as follows: and (5) qualified.

5. Weighing detection

The detection method comprises the following steps: and weighing the aluminum honeycomb structural member by adopting an electronic scale (the precision is not lower than 20g, the measuring range is not lower than 30Kg and the maximum measuring range is not more than 200 Kg).

The detection result is as follows: and (5) qualified.

6. Mechanical property detection

The furnace-following piece was prepared by the same method as in example 1, and the mechanical properties of the prepared furnace-following piece were detected by the following method: room temperature plane tensile strength was tested according to GJB130.4-86, 5 pieces in number; the shear strength of the room temperature plane is tested according to GJB130.6-86, and the number of the longitudinal parts and the transverse parts is 5 respectively; according to GB 7124-86, the room temperature tensile shear strength is tested, and the number of the tensile shear strength is 5; room temperature plate-plate 90 ° peel strength was tested according to GJB 446-88, 5 pieces in number; room temperature board-core 90 ° peel strength was tested according to GJB 130.8-86, 5 pieces in number.

The detection result is as follows: and (5) qualified.

In summary, according to the detection results of the above parameters, the performance of the aluminum honeycomb structural member is not lower than that of the original structural member after being bonded, and the aluminum honeycomb structural member can be used for remanufacturing and repairing of an aircraft wing structural member.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The gluing method of the aluminum honeycomb structural member is characterized by comprising the following steps in sequence:

the piece to be glued at least comprises a beam core block, a main beam, an upper skin, a lower skin, end ribs, a trailing edge strip and a honeycomb core;

the first verification process includes: sequentially laying an upper skin, a check film, F4 cloth, gauze, a honeycomb core, end ribs, a main beam, F4 cloth, gauze, a check film and a lower skin on a glue joint die, packaging the glue joint die, putting the glue joint die into an oven or an autoclave for check, removing packaging materials after the check is finished, taking down the check film, separating a pretreatment piece from the die, and obtaining information fed back on the check film as the first check information;

said performing a first assembly process on said first repair, obtaining a first assembly comprising: heating part of the first repair parts by using a hot air gun to obtain first heating parts; performing adhesive film paving treatment on the surface of the first heating piece to obtain an adhesive film paving piece; fixing the adhesive film paving piece and the remaining first repairing piece in an adhesive bonding mold to obtain the first assembly;

the second repair process includes: pasting and repairing the lower skin by adopting a glue film, foaming glue and epoxy resin prepreg to obtain the second repairing part;

2. The gluing method according to claim 1, wherein the temperature of the heating treatment is 95-100 ℃.

3. The gluing method according to claim 1 or 2, wherein the pre-treatment comprises: according to the piece to be glued, a first single-layer rubber and a second single-layer rubber are respectively obtained; adhering the first single-layer rubber and the second single-layer rubber to the first end face and the second end face of the piece to be glued respectively to obtain a piece to be polished; and polishing the workpiece to be polished to obtain the pretreatment piece.

4. The gluing method according to claim 1 or 2, wherein the pre-treatment comprises: and cleaning the to-be-glued piece by using acetone to obtain the pretreatment piece.

5. The bonding method according to claim 1, further comprising, before the first fitting process, performing a post-process on the first repair, the post-process including an oxide film removal process and an oil removal process.

6. The bonding method according to claim 5, further comprising applying a glue layer coating treatment to the treated member after the oxide film removing treatment.

7. The bonding method according to claim 1, wherein the first verification is performed using an oven or autoclave.

8. The gluing method according to claim 1, wherein the second fitting part and the first dismantling part are fixed inside the gluing mould, resulting in the second fitting part.