Push-pull glue joint die assembly method

Abstract

The invention discloses a push-pull glue joint mold closing method, and relates to the technical field of aviation industry. The push-pull type glue joint mold closing method comprises the following steps that S1, a fixture is designed and manufactured; s2, selecting and preparing a cement; s3, part trial assembly; s4, surface treatment; s5, die assembly and glue joint are carried out; s6, curing and demolding are conducted; and S7, quality detection. According to the push-pull type glue joint die assembly method, in the manufacturing process of large-size complex-shape aircraft structural parts, the precision and strength of secondary glue joint of composite material parts are improved. The push-pull type mold closing structure simplifies the mold closing and demolding process, and the production efficiency is improved. And the non-destructive testing method ensures the bonding quality, meets the quality requirement and improves the reliability and safety of the product.

Description

Technical Field

[0001] The invention relates to the technical field of aviation industry, in particular to a push-pull type adhesive bonding die method. Background Art

[0002] With the increasing demand for lightweight, high-strength structural parts in the aviation industry, all-composite materials have gradually become important materials in the aerospace field due to their excellent performance.

[0003] However, during the manufacturing process, composite structural parts usually require multiple bonding processes to ensure the integrity and reliability of the structure. The traditional bonding process is complex and difficult to control the precision, especially when it comes to large and complex-shaped parts. It is usually necessary to adjust the jig and fixture multiple times to ensure the accurate alignment of the bonding surface. The prior art often finds it difficult to achieve high-precision and stable connection of large-sized composite parts in the bonding process, which is prone to stress concentration and insufficient bonding strength. In view of the shortcomings of the prior art, the present invention provides a push-pull bonding die method to solve the above problems. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a push-pull type adhesive bonding method, which ensures the position accuracy and uniformity of the bonding surface during the bonding process through precise frame design and control system. The push-pull type bonding structure design, combined with precise control system and high-performance adhesive, improves the accuracy and strength of secondary bonding of composite material parts, especially in the manufacturing process of large-sized and complex-shaped aircraft structural parts. The push-pull type bonding structure simplifies the bonding and demolding process and improves production efficiency. The non-destructive testing method ensures the bonding quality, meets the quality requirements, and improves the reliability and safety of the product.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a push-pull type adhesive bonding mold method, comprising the following steps, step S1: designing and manufacturing a mold frame;

[0006] Based on the shape and structural characteristics of the composite material parts, a push-pull type mold structure with an adjustable function is designed and manufactured. The mold frame includes at least two modules, one of which is set as a push-pull slide rail module, and the other module is set as a fixed base module. The push-pull slide rail module includes a fixed pedestal and a movable pedestal. A docking structure is designed between the fixed pedestal and the movable pedestal to ensure the position accuracy during the bonding process;

[0007] Step S2: adhesive selection and preparation;

[0008] Choose high-performance two-component epoxy resin or modified polyurethane adhesive to ensure good adhesion and toughness between composite materials; the adhesive needs to be strictly proportioned and mixed before use to ensure its uniformity and stability; at the same time, control the temperature and humidity to prevent environmental factors from affecting the performance of the adhesive;

[0009] Step S3: test assembly of parts;

[0010] Assemble the preformed composite parts in the push-pull mold structure; use positioning pallets to position the parts to ensure the accuracy of part assembly;

[0011] Step S4: surface treatment;

[0012] Finely treat the surface of the composite material to be bonded to improve the adhesion of the adhesive;

[0013] Step S5: mold closing and gluing;

[0014] Start the push-pull slide rail module and slowly push the movable pedestal toward the fixed pedestal so that the bonding surfaces of the composite material parts between the two pedestals are in contact with each other; adjust the thrust and speed through the precision control system to ensure the uniformity and non-misalignment of the bonding surfaces; after the two pedestals are fully aligned, close the mold and apply appropriate pressure for secondary bonding;

[0015] Step S6: curing and demoulding;

[0016] According to the curing characteristics of the adhesive, the curing temperature and time are set for curing; during the curing process, the temperature is monitored and the humidity is adjusted to prevent the influence of environmental factors on the curing process; after the curing is completed, the fixed state of the mold is released, and the push-pull slide rail module is used to separate the fixed pedestal and the movable pedestal, and the composite material parts that have completed the secondary bonding are taken out from them;

[0017] Step S7: quality inspection;

[0018] Use non-destructive testing methods to evaluate the quality of bonding; ensure that there is no debonding, bubbles or other defects on the bonding surface to meet quality requirements.

[0019] Preferably, the fixed pedestal is provided with a first limiting frame, the first limiting frame is provided with a first closing plate, the first closing plate is provided with a first positioning card plate; the movable pedestal is provided with a second limiting frame, the second limiting frame is provided with a second closing plate, the second closing plate is provided with a second positioning card plate;

[0020] The first clamping plate, the first positioning clamping plate, the second clamping plate and the second positioning clamping plate are used to support and limit the composite material parts.

[0021] Preferably, the fixed base module is provided with a push-pull track, and the bottom of the movable platform is provided with a slide seat, and the slide seat is movably connected to the push-pull track.

[0022] Preferably, the side of the fixed base module is connected with a first positioning sleeve and a second positioning sleeve, the side of the movable platform is provided with a locking sleeve aligned with the first positioning sleeve and the second positioning sleeve, and a locking pin is movably inserted inside the locking sleeve.

[0023] Preferably, the fixed base is provided with a first fixed column, the movable base is provided with a second fixed column, the second fixed column is provided with a limiting hook, and the first fixed column is provided with a locking assembly for locking the limiting hook.

[0024] Preferably, the locking assembly includes a rotating arm and a locking frame, the rotating arm is rotatably connected to the first fixed column via a first rotating shaft, the locking frame is rotatably connected to the rotating arm via a second rotating shaft, and the locking frame is movably engaged in the limiting hook.

[0025] Preferably, in step S4, the fine treatment includes removing surface dirt, roughening and chemical cleaning.

[0026] Preferably, in step S7, the nondestructive testing method includes ultrasonic testing and X-ray testing.

[0027] Preferably, in step S2, the adhesive is a two-component epoxy resin.

[0028] Preferably, in step S2, the adhesive is a modified polyurethane adhesive.

[0029] The present invention discloses a push-pull type adhesive bonding die method, which has the following beneficial effects:

[0030] 1. This push-pull glue joint die method ensures high-precision positioning of composite material parts during the bonding process through precise frame design, especially the push-pull mold structure. The existence of the docking structure further improves the accuracy of the position, thereby ensuring the uniformity and non-dislocation of the bonding surface. During the mold closing process, the thrust and speed are adjusted through a precise control system, which effectively avoids displacement caused by improper operation or external force interference, and ensures the stability of the bonding quality.

[0031] 2. The push-pull glue bonding method and the push-pull bonding structure design simplify the bonding and demolding process, reduce the complexity and time cost of manual operation, and at the same time, the structure is easy to maintain and adjust, improves the flexibility and adaptability of the production line, thereby improving production efficiency.

[0032] 3. The push-pull adhesive bonding method uses high-performance two-component epoxy resin or modified polyurethane adhesive to ensure a firm connection and excellent mechanical properties between composite materials. During the curing process, by setting appropriate curing temperature and time, as well as temperature monitoring and humidity adjustment, the influence of environmental factors on the curing process is effectively prevented, ensuring the stability of the curing quality. Finally, through non-destructive testing methods such as ultrasonic testing and X-ray testing, the bonding quality can be accurately evaluated, potential defects can be discovered and dealt with in a timely manner, and the reliability and safety of the product can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the overall method of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a push-pull slide rail module and a fixed base module of the present invention;

[0036] Figure 3 For the present invention Figure 2 Enlarged view of part A;

[0037] Figure 4 It is a schematic diagram of the structure of the push-pull track of the present invention;

[0038] Figure 5 For the present invention Figure 4 Enlarged view of part B;

[0039] Figure 6 It is a structural schematic diagram of a fixed base module of the present invention;

[0040] Figure 7 It is a structural schematic diagram of the slide seat of the present invention.

[0041] In the figure: 1. push-pull slide rail module; 2. fixed frame; 21. first limit frame; 22. first combination plate; 23. first positioning plate; 3. movable frame; 31. second limit frame; 32. second combination plate; 33. second positioning plate; 4. push-pull rail; 41. first positioning sleeve; 42. second positioning sleeve; 5. slide seat; 51. locking sleeve; 52. locking pin; 6. first fixed column; 7. second fixed column; 71. limit hook; 8. locking assembly; 81. first rotating shaft; 82. rotating arm; 83. second rotating shaft; 84. locking frame; 9. fixed base module. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments 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.

[0043] The embodiment of the present application provides a push-pull adhesive bonding die method to solve the problem that the traditional adhesive bonding process is complicated and difficult to control the precision, especially when large and complex-shaped parts are involved, it is usually necessary to adjust the jig and the fixture multiple times to ensure the accurate alignment of the adhesive surface. In the existing technology, it is often difficult to achieve high-precision and stable connection of large-sized composite parts in the adhesive bonding process, and it is easy to cause stress concentration and insufficient adhesive strength.

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] The embodiment of the present invention discloses a push-pull type adhesive bonding method. Figure 1-7 As shown, the following steps are included: Step S1: design and manufacture of the frame;

[0046] Based on the shape and structural characteristics of the composite material parts, a push-pull type clamping structure with an adjustment function is designed and manufactured. The mold frame includes at least two modules, one of which is set as a push-pull slide rail module 1, and the other module is set as a fixed base module 9. The push-pull slide rail module 1 includes a fixed pedestal 2 and a movable pedestal 3. A docking structure is designed between the fixed pedestal 2 and the movable pedestal 3 to ensure the position accuracy during the bonding process;

[0047] Step S2: adhesive selection and preparation;

[0048] Choose high-performance two-component epoxy resin or modified polyurethane adhesive to ensure good adhesion and toughness between composite materials; the adhesive needs to be strictly proportioned and mixed before use to ensure its uniformity and stability; at the same time, control the temperature and humidity to prevent environmental factors from affecting the performance of the adhesive;

[0049] Step S3: test assembly of parts;

[0050] Assemble the preformed composite parts in the push-pull mold structure; use positioning pallets to position the parts to ensure the accuracy of part assembly;

[0051] Step S4: surface treatment;

[0052] Finely treat the surface of the composite material to be bonded to improve the adhesion of the adhesive;

[0053] Step S5: mold closing and gluing;

[0054] Start the push-pull rail module 1, and slowly push the movable pedestal 3 toward the fixed pedestal 2, so that the bonding surfaces of the composite material parts between the two pedestals are in contact with each other; adjust the thrust and speed through the precision control system to ensure the uniformity and non-misalignment of the bonding surface; after the two pedestals are fully aligned, close the mold and apply appropriate pressure for secondary bonding;

[0055] Step S6: curing and demoulding;

[0056] According to the curing characteristics of the adhesive, the curing temperature and time are set for curing; during the curing process, the temperature is monitored and the humidity is adjusted to prevent the influence of environmental factors on the curing process; after the curing is completed, the fixed state of the mold is released, and the fixed pedestal 2 and the movable pedestal 3 are separated by the push-pull slide rail module 1, and the composite material parts that have completed the secondary bonding are taken out therefrom;

[0057] Step S7: quality inspection;

[0058] Use non-destructive testing methods to evaluate the quality of bonding; ensure that there is no debonding, bubbles or other defects on the bonding surface to meet quality requirements. Non-destructive testing methods include ultrasonic testing and X-ray testing. Non-destructive testing methods can accurately evaluate the quality of bonding, detect and deal with potential defects in a timely manner, and ensure the reliability and safety of the product;

[0059] When conducting quality inspection, the main steps include:

[0060] Step S71: Select an ultrasonic detector and an X-ray machine, and ensure that the equipment is in good working condition;

[0061] Step S72: prepare the inspection area, clean the surface of the composite material component to be inspected, remove impurities such as oil, dust, etc. to ensure the accuracy of the inspection results, mark the inspection area, and clarify the inspection range and key parts;

[0062] Step S73: Setting detection parameters: According to the selected detection method and equipment, setting detection parameters include ultrasonic frequency, probe type and size, scanning speed; and X-ray tube voltage, tube current, and exposure time.

[0063] These parameters are set based on the material, thickness, structure and expected defect types of the composite part.

[0064] Step S74: perform detection, use an ultrasonic detector or an X-ray machine to scan or photograph the composite material component. During the scanning or photographing process, pay attention to observe and record the detection data, such as the ultrasonic echo signal, the X-ray transmission image, etc.

[0065] Step S75: Analyze the test results, process and analyze the collected test data, identify and evaluate the defects that may exist in the composite material component, and determine the degree of impact on the performance of the composite material component based on the type, size, location and other information of the defects.

[0066] Step S76: Record and report. Record the test results, analysis conclusions and any necessary suggestions in the test report. The report should reflect the test process, defects found and evaluation results in detail and accurately.

[0067] Step S77: Follow-up processing: repair or replace defective composite material parts according to the test results, and evaluate and improve non-destructive testing methods and equipment to improve detection efficiency and accuracy.

[0068] The fixed pedestal 2 is provided with a first limiting frame 21, the first limiting frame 21 is provided with a first clamping plate 22, and the first clamping plate 22 is provided with a first positioning card plate 23; the movable pedestal 3 is provided with a second limiting frame 31, the second limiting frame 31 is provided with a second clamping plate 32, and the second clamping plate 32 is provided with a second positioning card plate 33;

[0069] The first clamping plate 22, the first positioning clamping plate 23, the second clamping plate 32 and the second positioning clamping plate 33 are used to support and limit the composite material parts;

[0070] Through the design of the fixed pedestal 2 and the movable pedestal 3, the docking structure between the two ensures the position accuracy during the bonding process, avoiding the bonding quality problems caused by position deviation. The design of the first limiting frame 21 and the second limiting frame 31 provides stable support and limiting for the composite material parts, further improving the assembly accuracy;

[0071] The first and second joining plates 22 and 32 and the corresponding first positioning clamping plates 23 and second joining plates 32 make the assembly of parts more accurate and convenient.

[0072] A push-pull track 4 is provided on the fixed base module 9, and a slide 5 is provided at the bottom of the movable platform 3. The slide 5 is movably connected to the push-pull track 4. The push-pull track 4 provides a reliable guide for the smooth pushing and pulling of the movable platform 3, ensuring the smooth progress of the mold closing process. The design of the slide 5 enables the movable platform 3 to maintain a stable motion trajectory during the pushing and pulling process, avoiding gluing quality problems caused by shaking or jamming.

[0073] The side of the fixed base module 9 is connected with the first positioning sleeve 41 and the second positioning sleeve 42, and the side of the movable platform 3 is provided with a locking sleeve 51 aligned with the first positioning sleeve 41 and the second positioning sleeve 42. The locking pin 52 is movably inserted inside the locking sleeve 51. The cooperation of the first positioning sleeve 41, the second positioning sleeve 42, the locking sleeve 51 and the locking pin 52 provides additional positioning and locking functions, ensuring the stability after the mold is closed. This design effectively prevents the displacement problem caused by external interference.

[0074] A first fixing column 6 is provided on the fixed base 2, a second fixing column 7 is provided on the movable base 3, a limiting hook 71 is provided on the second fixing column 7, and a locking assembly 8 for locking the limiting hook 71 is provided on the first fixing column 6. The design of the locking assembly 8 makes the locking process between the movable base 3 and the fixed base 2 more flexible and convenient.

[0075] The locking assembly 8 includes a rotating arm 82 and a locking frame 84. The rotating arm 82 is rotatably connected to the first fixed column 6 via the first rotating shaft 81. The locking frame 84 is rotatably connected to the rotating arm 82 via the second rotating shaft 83. The locking frame 84 is movably engaged in the limiting hook 71. The coordinated use of the rotating arm 82 and the locking frame 84 makes the locking operation simpler and faster, while ensuring the firmness of the locking.

[0076] When the locking assembly 8 is needed to fix the position of the first fixed column 6 and the second fixed column 7, first check whether the locking assembly 8 is intact, including the rotating arm 82, the first rotating shaft 81, the second rotating shaft 83 and the locking frame 84 components, observe the limit hook 71 on the second fixed column 7 to ensure that it is in a lockable position, rotate the rotating arm 82 of the locking assembly 8 to an appropriate position through the first rotating shaft 81, so as to align the locking frame 84 with the limit hook 71, and then rotate the locking frame 84 through the second rotating shaft 83 to make it snap into the limit hook 71. At this time, the locking frame 84 should fit tightly against the limit hook 71 to prevent it from falling out, and finally further rotate the position of the rotating arm 82 to drive the locking frame 84 to buckle the limit hook 71 to ensure that the connection between the locking assembly 8 and the first fixed column 6 and the second fixed column 7 is firm;

[0077] Therefore, additional fixing and locking between the fixed base 2 and the movable base 3 is achieved.

[0078] Finally, check and confirm, carefully check whether the locking assembly 8 is completely locked to ensure that it is not loose or falling off, gently shake the first fixing column 6 and the second fixing column 7 to check whether they are firmly connected together without shaking or displacement; at this time, you can continue with subsequent process operations, such as gluing, curing, etc.

[0079] In step S4, the fine treatment includes removing surface dirt, grinding roughness and chemical cleaning. The fine treatment effectively improves the adhesion of the adhesive and ensures the stability of the product bonding quality.

[0080] This push-pull glue joint die method ensures the position accuracy and uniformity of the bonding process through precise jig design and control system. The push-pull mold structure design, combined with precise control system and high-performance adhesive, improves the accuracy and strength of secondary bonding of composite parts, especially in the manufacturing process of large-sized and complex-shaped aircraft structural parts. The push-pull mold structure simplifies the mold closing and demoulding process and improves production efficiency. Non-destructive testing methods ensure the quality of bonding, meet quality requirements, and improve product reliability and safety.

[0081] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0082] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A push-pull glue bonding method, characterized in that: The method comprises the following steps: step S1: designing and manufacturing a mold frame; based on the shape and structural characteristics of the composite material component, designing and manufacturing a push-pull type mold clamping structure with an adjustment function, the mold frame comprises at least two modules, one of which is configured as a push-pull slide rail module (1), and the other module is configured as a fixed base module (9), the push-pull slide rail module (1) comprises a fixed pedestal (2) and a movable pedestal (3), and a docking structure is designed between the fixed pedestal (2) and the movable pedestal (3); Step S2: Selecting an adhesive and performing proportioning and mixing; Step S3: Parts trial assembly; assembling the preformed composite parts in the push-pull mold structure; positioning the parts; Step S4: finely treating the surface of the composite material to be bonded to improve the adhesion of the adhesive; Step S5: mold closing and gluing; Start the push-pull slide rail module (1) and slowly push the movable platform (3) toward the fixed platform (2) so that the bonding surfaces of the composite material components between the two platforms are in contact with each other; After the two pedestals are completely aligned, close the mold and apply appropriate pressure for secondary bonding; Step S6: curing and demoulding; according to the curing characteristics of the adhesive, the curing temperature and time are set for curing; after the curing is completed, the fixed state of the mold is released, and the fixed base (2) and the movable base (3) are separated by using the push-pull slide rail module (1), and the composite material component that has completed the secondary bonding is taken out therefrom; Step S7: Quality testing: Use non-destructive testing methods to evaluate the quality of the bonding.

2. A push-pull glue bonding method according to claim 1, characterized in that: The fixed pedestal (2) is provided with a first limiting frame (21), the first limiting frame (21) is provided with a first closing plate (22), and the first closing plate (22) is provided with a first positioning clamping plate (23); the movable pedestal (3) is provided with a second limiting frame (31), the second limiting frame (31) is provided with a second closing plate (32), and the second closing plate (32) is provided with a second positioning clamping plate (33); The first clamping plate (22), the first positioning clamping plate (23), the second clamping plate (32) and the second positioning clamping plate (33) are used to support and limit the position of composite material parts.

3. A push-pull glue bonding mold method according to claim 1, characterized in that: The fixed base module (9) is provided with a push-pull track (4), the bottom of the movable platform (3) is provided with a slide seat (5), and the slide seat (5) is movably connected to the push-pull track (4).

4. A push-pull glue bonding method according to claim 3, characterized in that: The side of the fixed base module (9) is connected to a first positioning sleeve (41) and a second positioning sleeve (42), and the side of the movable platform (3) is provided with a locking sleeve (51) aligned with the first positioning sleeve (41) and the second positioning sleeve (42), and a locking pin (52) is movably inserted inside the locking sleeve (51).

5. A push-pull glue bonding method according to claim 1, characterized in that: The fixed base (2) is provided with a first fixed column (6), the movable base (3) is provided with a second fixed column (7), the second fixed column (7) is provided with a limit hook (71), and the first fixed column (6) is provided with a locking assembly (8) for locking the limit hook (71).

6. A push-pull glue bonding method according to claim 5, characterized in that: The locking assembly (8) comprises a rotating arm (82) and a locking frame (84); the rotating arm (82) is rotatably connected to the first fixed column (6) via a first rotating shaft (81); the locking frame (84) is rotatably connected to the rotating arm (82) via a second rotating shaft (83); and the locking frame (84) is movably engaged in the limiting hook (71).

7. A push-pull glue bonding method according to claim 1, characterized in that: In step S4, the fine processing includes removing surface dirt, grinding roughness and chemical cleaning.

8. A push-pull glue bonding method according to claim 1, characterized in that: In step S7, the nondestructive testing method includes ultrasonic testing and X-ray testing.

9. A push-pull glue bonding method according to claim 1, characterized in that: In step S2, the adhesive is a two-component epoxy resin.

10. A push-pull glue bonding method according to claim 1, characterized in that: In step S2, the adhesive is a modified polyurethane adhesive.

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