A method for bonding the surface of an aircraft composite door to rubber

Abstract

The present application relates to a method for bonding the surface of an aircraft composite door to rubber, and belongs to the technical field of aircraft non-metallic bonding. The method comprises the following steps: at a preset ambient temperature and humidity, the bonding surfaces of the door, rubber product, sample and prefabricated part are cleaned respectively; adhesive is evenly applied on the bonding surface; the rubber product coated with adhesive is attached and clamped to the door, and the prefabricated part coated with adhesive is attached and clamped to the sample; the clamped rubber product, door, prefabricated part, sample and rubber sample are cured; the sample and prefabricated part with qualified curing hardness are subjected to peel strength test until the peel strength test is qualified. The method for bonding the surface of an aircraft composite door to rubber invented by the present application solves the technical problem of poor bonding between a composite door and a rubber product, and can guide and realize the bonding between a composite material and a rubber product, so that the bonding strength after bonding meets the design index requirements.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft non-metallic bonding, and in particular relates to a method for bonding the surface of an aircraft composite cabin door to rubber. Background Art

[0002] With the improvement of aircraft assembly manufacturing technology requirements, it is necessary to bond rubber products on the surface of aircraft composite cabin doors.

[0003] Since the material of the aircraft cabin door is a composite material, the bonding performance between the rubber products bonded to it is poor. At present, there is no corresponding bonding method to guide and achieve the bonding between composite materials and rubber products, and it is impossible to test the bonding strength between the composite cabin door and the rubber products.

[0004] Therefore, it is urgent to tackle the problem of composite material-rubber bonding method to meet the design indicators and composite material-rubber bonding requirements. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the present application provides a method for bonding the surface of an aircraft composite cabin door to rubber, which is used to guide and realize the bonding between the surface of the composite cabin door and the rubber product, so as to solve the technical problems in the prior art that the bonding performance between the aircraft composite cabin door and the rubber product is poor and the bonding performance cannot be tested.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A method for bonding a surface of an aircraft composite door to rubber comprises the following steps:

[0008] Under the preset ambient temperature and humidity, clean the bonding surfaces of the hatch, rubber products, samples and prefabricated parts respectively;

[0009] Apply adhesive evenly on the cleaned bonding surface and make the remaining adhesive into a glue sample;

[0010] Lay and clamp the rubber product coated with adhesive to the hatch, and lay and clamp the prefabricated part coated with adhesive to the sample;

[0011] The clamped rubber products and doors, prefabricated parts and samples, and rubber samples are cured;

[0012] Perform a peel strength test on the sample with qualified curing hardness and the prefabricated part. If the peel strength between the sample and the prefabricated part is unqualified, that is, the peel strength between the cabin door and the rubber product is unqualified, return to the step of cleaning the bonding surfaces of the cabin door, rubber product, sample and prefabricated part respectively, and cycle until the peel strength between the cabin door and the rubber product is qualified.

[0013] Optionally, the step of curing the clamped rubber product and the hatch, the prefabricated part and the sample, and the rubber sample comprises:

[0014] Starting from the beginning of curing treatment, after 48 hours of curing treatment, use a hardness tester to test the curing hardness of the rubber sample once every 4 hours;

[0015] When the hardness tester detects that the curing hardness of the rubber sample is ≥40°, rubber products and hatches with qualified curing hardness, as well as prefabricated parts and samples with qualified curing hardness are obtained.

[0016] Optionally, the size of the glue sample is 50mm*30mm*3mm.

[0017] Optionally, the ambient temperature is 25±2°C, and the ambient humidity is ≤75%RH.

[0018] Optionally, when the peel strength between the sample and the prefabricated part is ≥3kN / m, the peel strength between the rubber product and the cabin door is qualified.

[0019] Optionally, the adhesive is applied to the bonding surface with a thickness of 1 mm.

[0020] Optionally, the step of attaching and clamping the rubber product coated with adhesive to the cabin door comprises:

[0021] Attach the rubber product coated with adhesive to the hatch;

[0022] During the activation period of the adhesive, the rubber product is rolled to squeeze out the excess adhesive between the rubber product and the door, so that the adhesive is evenly distributed;

[0023] Remove the squeezed adhesive and use tape to adhere and secure the rubber product to the hatch.

[0024] Optionally, the step of bonding and clamping the prefabricated part coated with adhesive to the sample part comprises:

[0025] Laminating the preform coated with adhesive to the sample;

[0026] During the activation period of the adhesive, the preform is rolled to squeeze out the excess adhesive between the preform and the sample so that the adhesive is evenly distributed;

[0027] Remove the extruded adhesive and use tape to attach and fix the preform and sample.

[0028] Optionally, the activation period is 25-35 minutes.

[0029] Optionally, a plurality of adhesive tapes are provided at intervals, and the spacing between adjacent adhesive tapes is 100 mm.

[0030] Compared with the prior art, the beneficial effects of this application are:

[0031] The method for bonding the surface of an aircraft composite door to rubber invented in the present application solves the technical problem of poor bonding between a composite door and a rubber product, and can guide and realize the bonding between the composite material and the rubber product so that the bonding strength after bonding meets the design index requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A principle flow chart of a method for bonding a composite aircraft door surface to rubber provided in an embodiment of the present application;

[0033] Figure 2 This is a structural rendering of the tape-fixed hatch and rubber product provided in the embodiments of the present application.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Hatch door; 2. Adhesive; 3. Rubber products; 4. Tape; 5. Clamping tool; 6. Pressing tool. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in combination with the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Based on the attached Figure 1 , 2 This embodiment provides a method for bonding a composite aircraft door surface to rubber, comprising the following steps:

[0038] S10. Clean the bonding surfaces of the hatch, rubber products, samples and prefabricated parts respectively under the preset ambient temperature and humidity;

[0039] In this embodiment, the ambient temperature and humidity for the bonding construction of the hatch 1 and the rubber product 3 are: temperature 25±2°C, relative humidity ≤75%RH; when the ambient temperature and relative humidity do not meet the ambient temperature and humidity requirements, the temperature and relative humidity should be adjusted to the ambient temperature and humidity requirements before the bonding construction of the hatch 1 and the rubber product 3 is carried out.

[0040] In the present embodiment, the bonding construction of the hatch 1 and the rubber product 3 needs to be carried out in a clean room to reduce the influence of dust particles in the environment on the bonding. The dust particles in the environment are easy to adhere to the surfaces of the hatch 1 and the rubber product 3. When the adhesive 2 is applied, the adhesive 2 comes into contact with the dust particles in the air, which will affect the bonding between the hatch 1 and the rubber product 3. Therefore, the bonding construction operation of the hatch 1 and the rubber product 3 needs to be carried out in a clean room.

[0041] In this embodiment, the step of cleaning the bonding surfaces of the hatch door 1, the rubber product 3, the sample and the prefabricated part comprises: using a white cloth dipped in a detergent to wipe the bonding area and the non-bonding area corresponding to the hatch door 1, the rubber product 3, the sample and the prefabricated part to remove dust particles attached to the surfaces of the hatch door 1, the rubber product 3, the sample and the prefabricated part;

[0042] In this embodiment, the cleaning agent is preferably acetone. Acetone is volatile and can effectively dissolve and clean the dust particles on the surface of the hatch 1, rubber product 3, samples and prefabricated parts. At the same time, when acetone is used as a cleaning agent, it will not corrode the hatch 1, rubber product 3, samples and prefabricated parts. Therefore, in this embodiment, the cleaning agent can also be selected from other cleaning agent components that will not corrode the hatch 1, rubber product 3, samples and prefabricated parts.

[0043] In this embodiment, after cleaning, the hatch 1, rubber product 3, samples and prefabricated parts need to be dried for 10-20 minutes, preferably 15 minutes. The purpose of drying is to allow the acetone to fully evaporate naturally to reduce the residual acetone.

[0044] In this embodiment, the material, thickness and surface roughness of the sample are the same as those of the hatch 1, and the material, thickness and surface roughness of the prefabricated part are the same as those of the rubber product 3;

[0045] In this embodiment, to bond the hatch door to the rubber product, the hatch door and the rubber product need to be set in corresponding quantities; to bond the sample to the prefabricated part, the sample and the prefabricated part need to be set in corresponding quantities;

[0046] In this embodiment, the number of the hatch 1, rubber product 3, sample and prefabricated part used is all one.

[0047] In some examples, n doors, n rubber products, m samples and m prefabricated parts may be used; wherein n and m are both positive integers ≥ 1; for example, when n = 1 and m = 3, a pair of doors and rubber products are bonded, and three pairs of samples and prefabricated parts are bonded at the same time. The samples and prefabricated parts that have passed the curing test are subjected to a peel strength test, which can more accurately determine whether the peel strength of the door and rubber product is qualified. By setting up multiple pairs of samples and prefabricated parts, the influence of operating errors on the peel strength of the samples and prefabricated parts can be avoided, and the peel strength test results of the doors and rubber products are more accurate. For example, when n = 3 and m = 1, three pairs of doors and rubber products are bonded, and a pair of samples and prefabricated parts are bonded at the same time. After the process of bonding doors and rubber products matures, doors bonded with rubber products can be continuously produced in the above manner, and whether the peel strength of the three pairs of doors and rubber products is qualified can be determined by testing the peel strength of a pair of samples and prefabricated parts.

[0048] S20. Evenly apply adhesive to the bonding surface after cleaning, and make the remaining adhesive into a glue sample;

[0049] In this embodiment, the thickness of the adhesive 2 applied on the bonding surface is 1 mm. It is easy to understand that when the hatch door 1 and the rubber product 3 are bonded, the adhesive 2 is applied to both sides of the bonding area between the hatch door 1 and the rubber product 3. Therefore, after the hatch door 1 and the rubber product 3 are subsequently bonded, the thickness of the adhesive 2 between the hatch door 1 and the rubber product 3 can be accumulated to 2 mm (in a non-pressed state);

[0050] In this embodiment, the bonding surfaces are respectively represented as the corresponding bonding surfaces of the hatch 1 and the rubber product 3, and the corresponding bonding surfaces of the sample and the prefabricated part. The purpose of applying the adhesive 2 between the sample and the prefabricated part is to make the adhesive 2 applied between the sample and the prefabricated part the same as the adhesive 2 applied between the hatch 1 and the rubber product 3, so as to facilitate the subsequent non-contact peel strength test.

[0051] In this embodiment, the adhesive 2 used is a semi-solid adhesive 2, and the activity period of the adhesive 2 is 30 minutes.

[0052] In this embodiment, the adhesive 2 is applied by using an adhesive 2 extrusion gun to extrude the adhesive 2 onto the bonding surfaces of the hatch 1, the rubber product 3, the sample and the prefabricated part, and then applying the adhesive evenly;

[0053] In this embodiment, the adhesive 2 can also be applied in the following manner: using an adhesive 2 extrusion gun to extrude the adhesive 2 onto the bonding surfaces of the hatch 1, the rubber product 3, the sample and the prefabricated part, and wearing gloves to evenly apply the adhesive 2 manually;

[0054] In this embodiment, after applying adhesive 2 to the hatch 1, rubber product 3, sample and prefabricated part, the remaining adhesive 2 is used to make two glue samples with a size of 50mm*30mm*3mm. The two glue samples correspond to the hatch-rubber product and sample-prefabricated part settings respectively. The purpose of setting the glue samples is: to detect the curing hardness of the applied adhesive without contacting the applied adhesive; and to obtain the glue sample within the activation period of the adhesive.

[0055] In this embodiment, after the adhesive is extruded onto the bonding surfaces of the door 1 , the rubber product 3 , the sample and the prefabricated component, the adhesive 2 should be evenly applied within the activation period of the adhesive 2 .

[0056] S30. Lay and clamp the rubber product coated with adhesive to the hatch, and lay and clamp the prefabricated part coated with adhesive to the sample;

[0057] In this embodiment, the step of bonding the rubber product coated with adhesive to the cabin door includes: placing and fixing the cabin door 1 with its bonding surface facing upward, manually moving the rubber product 3 with its bonding surface facing downward, and bonding the bonding surface of the rubber product 3 to the bonding surface of the cabin door 1; during the bonding process, it should be noted that the bonding surface of the rubber product 3 corresponds to the bonding surface of the cabin door 1 and cannot be offset or rotated relative to each other. After bonding, the position of the rubber product 3 bonded to the surface of the cabin door 1 should be observed and observed; if the bonding position shifts, the bonding position of the rubber product 3 should be corrected; if the shift in the bonding position cannot be corrected, it indicates that the bonding has failed, and it is necessary to remove the adhesive 2 and return to the steps of preparing the cabin door, rubber product, sample and prefabricated parts until the bonding is successful.

[0058] In this embodiment, the step of bonding and pressing the rubber product 3 coated with adhesive 2 to the cabin door 1 includes: bonding the rubber product 3 coated with adhesive 2 to the cabin door 1; after successful bonding (no positional offset), during the activation period of the adhesive 2, rolling the rubber product 3 to squeeze out excess adhesive 2 between the rubber product 3 and the cabin door 1 so that the adhesive 2 is evenly distributed; after rolling to evenly distribute the adhesive 2, cleaning and removing the extruded adhesive 2, and using tape 4 to bond and fix the rubber product 3 to the cabin door 1.

[0059] In this embodiment, the step of bonding and clamping the preform coated with adhesive 2 and the sample includes: bonding the preform coated with adhesive 2 to the sample; after successful bonding (no positional offset), during the activation period of the adhesive 2, rolling the preform to squeeze out excess adhesive 2 between the preform and the sample so that the adhesive 2 is evenly distributed; after the adhesive 2 is evenly distributed, cleaning and removing the extruded adhesive 2, and bonding and fixing the preform and the sample with tape 4.

[0060] In this embodiment, the rolling process of the rubber product 3 and the preform should be performed simultaneously. The rolling process is performed manually, and reciprocating extrusion is performed along the surface of the rubber product 3 and the preform during rolling, and the rolling force is kept consistent as much as possible.

[0061] In this embodiment, a plurality of tapes 4 are provided, and the spacing between adjacent tapes 4 is 100 mm; the tape 4 used to fix the rubber product 3 and the cabin door 1 needs to simultaneously adhere to and cover the upper surface of the rubber product 3 and the lower surface of the cabin door 1; the tape used to fix the preform and the sample needs to simultaneously adhere to and cover the upper surface of the preform and the lower surface of the sample.

[0062] In this embodiment, after rolling is completed, the tape 4 is used for fixing as follows: first, one end of the tape 4 is attached to the upper surface of the hatch 1, then the box is lifted to the upper surface of the rubber product 3, and finally, the tape 4 is attached to the lower surface of the hatch 1.

[0063] In this embodiment, the adhesive tape 4 is perpendicular to the length direction of the rubber product 3 .

[0064] In this embodiment, the tape 4 should be fully adhered along the corresponding path during the bonding process. The function of the tape 4 is to prevent the relative position of the rubber product 3 or the preform from shifting, and to ensure that the rubber product 3 and the preform are positioned before the adhesive 2 is cured.

[0065] In this embodiment, before applying the tape 4, the adhesive 2 squeezed out by rolling needs to be cleaned first, and then the tape 4 can be applied; because when the adhesive 2 is rolled out, the adhesive 2 is squeezed out from the edge between the rubber product 3 and the cabin door 1, when the rolling is completed, the squeezed adhesive 2 is removed along the edge of the rubber product 3.

[0066] In this embodiment, the steps of clamping the hatch 1 and the rubber product 3 include: fixing the rubber product 3 and the hatch 1 with tape 4, clamping the rubber product 3 and the hatch 1 with a clamping tool 5, and the output end of the clamping tool acts on the clamping tool 5 to apply a force to the rubber product 3 and the hatch 1 to move them closer to each other for clamping.

[0067] In this embodiment, the clamping method of the sample and the prefabricated part is the same as the clamping method of the hatch 1 and the rubber product 3, and the clamping force is the same.

[0068] In this embodiment, the clamping tool 5 contacts the surface of the rubber product 3 facing away from the adhesive 2 , and the contact area between the clamping tool 5 and the surface of the door 1 facing away from the adhesive 2 is larger than the contact area between the clamping tool 5 and the rubber product 3 .

[0069] S40. Curing the clamped rubber product and the door, the prefabricated part and the sample, and the rubber sample;

[0070] In this embodiment, the conditions for the curing treatment are: curing temperature 25±2°C, curing relative humidity ≤75%RH; the conditions for the curing treatment are the same as the ambient temperature and humidity conditions. Therefore, the start time of the curing treatment can be determined from the completion of clamping, and the time of the curing treatment can be counted.

[0071] In this embodiment, the step of curing the clamped rubber products and hatches, prefabricated parts and samples, and rubber samples includes: starting from the start of the curing treatment, after the curing treatment is carried out for 48 hours, the curing hardness of the rubber sample is tested once every 4 hours using a hardness tester; when the hardness tester detects that the curing hardness of the rubber sample is ≥40°, rubber products and hatches with qualified curing hardness, as well as prefabricated parts and samples with qualified curing hardness are obtained.

[0072] In the present embodiment, two rubber samples are provided, corresponding to the hatch 1 and the rubber product 3 and the sample and the prefabricated part respectively. By using a hardness tester to measure the curing hardness value of the rubber sample, it is possible to determine whether the hatch 1 and the rubber product 3 and the sample and the prefabricated part are all cured, that is, without contacting the adhesive 2 between the hatch 1 and the rubber product 3 and the sample and the prefabricated part, the purpose of detecting whether the curing hardness is qualified is achieved.

[0073] In this embodiment, the hardness tester used to detect the curing hardness of the glue sample is a Shore hardness tester;

[0074] In this embodiment, since the rubber product 3 is fixedly connected to the hatch 1 through the adhesive 2, the adhesive 2 is arranged between the rubber product 3 and the adhesive 2 in a "layer" manner, and it is impossible to use other contactable methods to detect the curing strength of the adhesive 2. Therefore, in order to perform a non-contact curing hardness test, after the step of applying the adhesive 2, the remaining adhesive 2 is made into a glue sample, which ensures that the material of the glue sample is the same as that of the adhesive 2. Since the glue sample and the adhesive 2 are in the same environment, the curing speeds of the two are consistent. When it is detected that the curing of the glue sample reaches ≥40°, it indicates that the curing of the adhesive 2 meets the requirements, thereby realizing the detection of the curing state of the adhesive 2 without contacting the adhesive 2;

[0075] In this embodiment, the prior art measures the curing strength of the adhesive 2 by separating the rubber product 3 from the adhesive 2 and then measuring the curing strength of the adhesive 2. However, separating the rubber product 3 from the adhesive 2 is contrary to the technical purpose of bonding the rubber product 3 to the cabin door 1 in this embodiment. Therefore, in this embodiment, the curing hardness of the glue sample is tested. On the one hand, when measuring the curing degree of the adhesive 2 between the cabin door 1 and the rubber product 3, there is no need to separate the rubber product 3 from the adhesive 2; on the other hand, the quality of the bonding between the rubber product 3 and the cabin door 1 is guaranteed, and the influence of related tests on the bonding quality between the rubber product 3 and the cabin door 1 is avoided, so as to guide and realize the bonding between the composite cabin door 1 and the rubber product 3.

[0076] S50. Perform a peel strength test on the sample with qualified curing hardness and the prefabricated part. If the peel strength between the sample and the prefabricated part is unqualified, that is, the peel strength between the cabin door 1 and the rubber product 3 is unqualified, return to the step of cleaning the bonding surfaces of the cabin door 1, the rubber product 3, the sample and the prefabricated part respectively, and cycle until the peel strength between the cabin door 1 and the rubber product 3 is qualified.

[0077] In this embodiment, the peel strength between the test hatch 1 and the rubber product 3 is determined by testing the peel strength between the sample and the prefabricated part, and the specific steps include: preparing the sample and the prefabricated part; wherein the material, thickness and surface condition of the sample are the same as those of the hatch 1; the material, thickness and surface condition of the prefabricated part are the same as those of the rubber product 3; cleaning the bonding surfaces of the sample and the prefabricated part and drying them; applying adhesive 2 evenly on the bonding surfaces; fitting the sample and the prefabricated part; clamping the sample and the prefabricated part; and performing curing simultaneously with the curing treatment of the hatch 1 and the rubber product 3. After the curing treatment is qualified; test the 180° peel strength of the sample. When the 180° peel strength between the prefabricated part and the sample is ≥3kN / m, it indicates that the bonding between the hatch 1 and the rubber product 3 meets the requirements; when the 180° peel strength between the prefabricated part and the sample is <3kN / m, it indicates that the bonding between the hatch 1 and the rubber product 3 does not meet the requirements. Therefore, after removing and cleaning the cured adhesive 2, the hatch 1 and the rubber product 3 are bonded again according to the above steps; when repeating the bonding steps between the hatch and the rubber product, the bonding steps between the sample and the prefabricated part should be repeated at the same time.

[0078] In this embodiment, the 180° peel strength of the sample and the preform is tested according to the 180° peel strength test method specified in GB / T 2790-1995 "Adhesive 2180° Peel Strength Test Method Flexible Material to Rigid Material".

[0079] In this embodiment, when it is detected that the 180° peel strength between the hatch 1 and the rubber product 3 meets the requirements, the clamping fixture 5 and the clamping tool are removed, and the tape 4 is torn off. Then, the surfaces of the hatch 1 and the rubber product 3 are finally cleaned and finally delivered to the next process for use.

[0080] In this embodiment, the sample-preform system prepared by the "non-contact peel strength test" is the same method as the bonding of the hatch 1 and the rubber product 3, and when bonding the hatch 1 and the rubber product 3, the purpose of preparing the sample-preform system by the "non-contact peel strength test" can be simultaneously completed. Therefore, the sample-preform preparation process is consistent with the bonding process of the hatch 1 and the rubber product 3. In this way, by testing the 180° peel strength of the sample-preform, it can be shown that the strength performance of the bonding between the hatch 1 and the rubber product 3 meets the requirements;

[0081] In this embodiment, after the 180° peel strength test of the sample and the preform is completed, it is necessary to remove the cured adhesive 2 on the surface of the sample and the preform and clean them for next use; before the next use, it is necessary to determine whether the material, thickness and surface state of the sample are the same as the cabin door 1 to be bonded, and at the same time determine whether the material, thickness and surface state of the preform are the same as the rubber product 3 to be bonded, so as to bond the next pair of cabin doors and rubber products.

[0082] The technical effects achieved by the method of bonding the surface of the aircraft composite material door 1 to rubber in this embodiment are:

[0083] First, since the present embodiment adopts non-contact curing strength test and non-contact peeling strength test, the curing strength and peeling strength of the bonding between the hatch door 1 and the rubber product 3 can be tested without contacting the hatch door 1 and the rubber product 3, thereby ensuring the bonding between the hatch door 1 and the rubber product 3;

[0084] Second, since the present embodiment does not require contact between the cabin door 1 and the rubber product 3 when bonding them, the curing hardness and peel strength test of the bonding between the cabin door and the rubber product can be realized, the non-destructive test of the bonding curing between the composite cabin door 1 and the rubber product 3 can be solved, and the bonding quality between the cabin door and the rubber product can be guaranteed.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for bonding the surface of an aircraft composite door to rubber, characterized in that: The following steps are involved: At the preset ambient temperature and humidity, the bonding surfaces of the hatch, rubber product, sample and prefabricated part are cleaned respectively; the material, thickness and surface roughness of the sample are the same as those of the hatch, and the material, thickness and surface roughness of the prefabricated part are the same as those of the rubber product; Apply adhesive evenly on the cleaned bonding surface and make the remaining adhesive into a glue sample; Lay and clamp the rubber product coated with adhesive to the hatch, and lay and clamp the prefabricated part coated with adhesive to the sample; The clamped rubber products and hatches, prefabricated parts and samples, and rubber samples are subjected to curing treatment; including: starting from the beginning of the curing treatment, after the curing treatment is carried out for 48 hours, the curing hardness of the rubber sample is tested once every 4 hours with a hardness tester; when the hardness tester detects that the curing hardness of the rubber sample is ≥40°, the rubber products and hatches, and the prefabricated parts and samples with qualified curing hardness are obtained; Perform a peel strength test on the sample with qualified curing hardness and the prefabricated part. If the peel strength between the sample and the prefabricated part is unqualified, that is, the peel strength between the cabin door and the rubber product is unqualified, return to the step of cleaning the bonding surfaces of the cabin door, rubber product, sample and prefabricated part respectively, and cycle until the peel strength between the cabin door and the rubber product is qualified.

2. The method for bonding the surface of a composite aircraft door to rubber according to claim 1, characterized in that: The size of the glue sample is 50mm*30mm*3mm.

3. The method for bonding the surface of an aircraft composite door to rubber according to claim 1, characterized in that: The ambient temperature is 25±2°C, and the ambient humidity is ≤75%RH.

4. The method for bonding the surface of an aircraft composite door to rubber according to claim 1, characterized in that: When the peel strength between the sample and the prefabricated part is ≥3 kN / m, the peel strength between the rubber product and the cabin door is qualified.

5. The method for bonding the surface of an aircraft composite door to rubber according to claim 1, characterized in that: The coating thickness of the adhesive on the bonding surface is 1 mm.

6. The method for bonding the surface of a composite aircraft door to rubber according to claim 1, characterized in that: The step of attaching and clamping the rubber product coated with adhesive to the hatch door comprises: Attach the rubber product coated with adhesive to the hatch; During the activation period of the adhesive, the rubber product is rolled to squeeze out the excess adhesive between the rubber product and the door, so that the adhesive is evenly distributed; Remove the squeezed adhesive and use tape to adhere and secure the rubber product to the hatch.

7. The method for bonding the surface of an aircraft composite door to rubber according to claim 1, characterized in that: The step of bonding and clamping the prefabricated part coated with adhesive to the sample part comprises: Laminating the preform coated with adhesive to the sample; During the activation period of the adhesive, the preform is rolled to squeeze out the excess adhesive between the preform and the sample so that the adhesive is evenly distributed; Remove the extruded adhesive and use tape to attach and fix the preform and sample.

8. A method for bonding a composite aircraft door surface to rubber according to claim 6 or 7, characterized in that: The activation period is 25-35 minutes.

9. A method for bonding a composite aircraft door surface to rubber according to claim 6 or 7, characterized in that: The adhesive tapes are arranged in plurality at intervals, and the spacing between adjacent adhesive tapes is 100 mm.

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