An aluminum alloy profile assembly method with adaptive sealing

Abstract

The application discloses an aluminum alloy profile assembly method with self-adaptive sealing, which is characterized by the following steps: presetting a self-adaptive sealing groove and an elastic sealing assembly at the splicing end of an aluminum alloy profile, combining with a step-by-step assembly process of real-time gap detection, self-adaptive deformation compensation of the sealing element and hierarchical locking positioning, and realizing automatic fine adjustment and adaptation of the sealing structure to the profile assembly gap; collecting splicing gap data in real time during the assembly process, driving the elastic sealing assembly to have controllable elastic deformation, accurately filling the assembly gap of different sizes, locking the sealing state through the positioning and locking structure, and avoiding the relaxation and deviation of the sealing element; the application effectively eliminates the sealing defects caused by the profile processing error and assembly deviation, greatly improves the sealing stability and environmental adaptability of the profile assembly body, has simple process, wide adaptation range, and is suitable for the precise sealing assembly of various building and industrial aluminum alloy profiles, and has good engineering application prospect.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy profile assembly technology, specifically relating to an aluminum alloy profile assembly method with self-adaptive sealing. Background Technology

[0002] Aluminum alloy profiles, with their advantages of light weight, high strength, corrosion resistance, and ease of processing and forming, are widely used in many fields such as building curtain walls, door and window frames, industrial equipment racks, and rail transit components. In practical engineering applications, aluminum alloy profiles mostly need to be assembled into an overall frame structure through multi-segment splicing. The sealing performance of the profile splicing points directly determines the waterproof, dustproof, sound insulation, and corrosion resistance of the overall structure, and is a core and critical link in the profile assembly process.

[0003] Existing aluminum alloy profile assembly and sealing processes mostly employ fixed-specification sealing strips and gaskets combined with rigid splicing and locking to complete assembly. The dimensions and deformation range of the sealing structure are fixed parameters, resulting in extremely poor adaptability. Due to unavoidable processing tolerances during the extrusion and cutting of aluminum alloy profiles, and alignment deviations arising from manual and equipment assembly, the assembly gaps at profile joints exhibit random fluctuations of 0.1-3mm. The gap dimensions cannot be standardized across different batches and assembly locations. Existing fixed sealing structures cannot adaptively adjust their deformation state according to these gap fluctuations. When the assembly gap is smaller than the preset size of the sealing structure, excessive extrusion deformation, cracking, and aging of the seals can occur, leading to seal failure with prolonged use. When the assembly gap is larger than the preset size, the seals cannot completely fill the joint gaps, resulting in voids and defects such as water seepage, dust ingress, and air leakage, severely impacting the performance and service life of the profile frame.

[0004] Currently, the conventional improvement methods in the industry are only to replace the seals with different specifications or to manually adjust the extrusion pressure. This method requires matching a variety of sealing accessories in advance, the adaptation process is cumbersome, and the accuracy of manual adjustment is extremely low. It cannot fundamentally solve the core problems of poor seal compatibility and insufficient seal stability caused by profile processing tolerances and assembly gap deviations. Moreover, it cannot achieve automated and standardized assembly, which seriously restricts the upgrading and application of precision assembly technology for aluminum alloy profiles.

[0005] In summary, the existing aluminum alloy profile assembly process suffers from the core technical problem that the sealing structure lacks self-adjustment capability and cannot adapt to fluctuations in profile processing tolerances and assembly gaps, resulting in poor sealing adaptability and high sealing failure rate. It is necessary to develop an aluminum alloy profile assembly method that can adapt to different assembly gaps, has strong sealing stability, and is standardized in process. Summary of the Invention

[0006] This invention addresses the core problems of existing technologies by providing an aluminum alloy profile assembly method with adaptive sealing. It solves the technical problem that traditional fixed sealing structures cannot adapt to profile processing tolerances and assembly gap fluctuations, resulting in poor sealing adaptability and sealing failure. The method achieves adaptive sealing filling of profile splicing gaps, improving assembly accuracy and sealing stability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for assembling an aluminum alloy profile with adaptive sealing includes the following steps: Step S1, Profile pretreatment: Grind, degrease and remove rust from the splicing end faces of the two sets of aluminum alloy profiles to be assembled to ensure that the flatness error of the splicing end faces is ≤0.02mm. Matching adaptive sealing grooves are pre-cut on the splicing side of the two sets of aluminum alloy profiles. The adaptive sealing grooves are stepped groove structures. Step S2, Pre-installation of sealing components: The adaptive elastic sealing component is embedded into the adaptive sealing groove of one set of aluminum alloy profiles to complete the pre-positioning and fixing. The adaptive elastic sealing component includes an elastic matrix, adaptive deformation protrusions and limiting positioning strips. Step S3, gap detection and alignment: The two sets of aluminum alloy profiles are spliced ​​and aligned, and the assembly gap value at the splicing point of the two sets of profiles is detected in real time by a high-precision gap detection device to obtain gap fluctuation range data; Step S4, Adaptive sealing fit: Based on the assembly gap value obtained by detection, the two sets of profiles are squeezed to make the adaptive elastic sealing component undergo controllable elastic deformation. The adaptive deformation protrusion automatically fills the splicing gap to achieve adaptive sealing fit of different gap sizes. Step S5, graded locking and shaping: The two sets of aluminum alloy profiles after splicing are positioned and locked using a graded locking method. First, the profiles are lightly pre-tightened to fix their alignment, and then pressure is gradually applied to lock the deformation sealing state of the adaptive elastic sealing component. Step S6, sealing verification and finalization: After locking, the airtightness of the sealing performance at the profile splice is tested. Once qualified, the overall assembly is completed.

[0009] In a preferred embodiment of the present invention, in step S1, the stepped groove structure of the adaptive sealing groove includes a shallow positioning groove and a deep deformation groove. The shallow positioning groove matches the limiting positioning strip, and the deep deformation groove provides deformation buffer space for the adaptive deformation protrusion. The groove width of the adaptive sealing groove is set to 5-12mm, and the groove depth is set to 3-8mm.

[0010] In a preferred embodiment of the present invention, step S2, the elastic matrix of the adaptive elastic sealing component is made of modified EPDM rubber with a hardness of 60-75HA, tensile strength ≥18MPa, and elongation at break ≥450%, which is suitable for high and low temperature deformation environments.

[0011] In a preferred embodiment of the present invention, in step S3, the high-precision gap detection device uses a laser gap sensor with a detection accuracy of ≤0.01mm and a single detection response time of ≤0.5s. It collects the maximum, minimum and average values ​​of the splicing gap in real time and generates a gap fluctuation data curve.

[0012] In a preferred embodiment of the present invention, in step S4, the adaptive deformation protrusion is an arc-shaped gradually changing protrusion structure with a protrusion height of 2-5mm. It can undergo adaptive compression deformation according to the assembly gap difference of 0.1-3mm, and the deformation springback error is ≤0.05mm.

[0013] In a preferred embodiment of the present invention, in step S5, the graded locking method is divided into three levels of locking: the first level pre-tightening locking torque is 3-5 N·m, the second level pressurizing locking torque is 8-12 N·m, and the third level shaping locking torque is 15-18 N·m. After each level of locking, the pressure is maintained for 10-15 seconds.

[0014] In a preferred embodiment of the present invention, in step S1, during the pretreatment process, the grinding is carried out by using 800-grit and 1200-grit sandpaper for fine grinding, the degreasing is carried out by wiping with anhydrous ethanol, and the rust removal is carried out by passivation treatment with weak acid. After treatment, the splicing end face of the profile is free of burrs and oxide layer.

[0015] In a preferred embodiment of the present invention, in step S2, during the pre-assembly of the sealing component, the limiting positioning strip and the shallow positioning groove adopt an interference fit with an interference amount of 0.1-0.3mm to ensure that the sealing component is not offset or loose. After pre-assembly, the height of the sealing component protruding from the end face of the profile is 1-2mm.

[0016] In a preferred embodiment of the present invention, in step S6, the airtightness test is performed using a pneumatic pressure test method. The test pressure is 0.3-0.5 MPa, the pressure holding time is 30 s, and the pressure drop is ≤0.02 MPa, which indicates that the seal is qualified.

[0017] In a preferred embodiment of the present invention, in step S6, after assembly, a thin layer of waterproof sealant is applied to the outside of the profile splice gap. The sealant thickness is 0.5-1mm, forming a double-layer sealing and protective structure to improve the overall sealing durability.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention addresses the single core problem of existing technologies by innovatively designing a stepped adaptive sealing groove in conjunction with a deformable elastic sealing component. Combined with real-time gap detection and adaptive deformation control technology, it breaks through the limitations of traditional fixed sealing structures. It can adapt to profile assembly gap fluctuations within the range of 0.1-3mm, perfectly offsetting sealing defects caused by profile processing tolerances and assembly alignment deviations. It fundamentally solves the problems of loose seal fit, excessive compression cracking, and air and water leakage in gaps, greatly improving the adaptability and stability of the seal.

[0019] 2. This invention adopts a graded locking and shaping process. Through three-level gradient torque locking and step-by-step pressure holding and shaping, the adaptive deformation state of the sealing component can be accurately locked, avoiding the problems of seal deformation failure and misalignment caused by single heavy locking. This ensures that the sealing structure does not loosen or fall off during long-term use, and greatly extends the service life of the profile assembly structure.

[0020] 3. This invention incorporates a high-precision laser gap detection process to achieve quantitative acquisition of gap data. Based on the measured data, it precisely controls the deformation of the sealing component, abandoning the traditional manual assembly method based on experience. The assembly precision is standardized and controllable, and the assembly qualification rate is increased from about 85% in the traditional process to over 99%, making it suitable for the precision assembly needs of various specifications of aluminum alloy profiles.

[0021] 4. This invention adopts a standardized assembly line process of pretreatment, pre-assembly, testing, adaptive sealing, graded locking, and verification. The steps are closely connected and the operation is simple. There is no need to change multiple specifications of sealing parts, which greatly simplifies the assembly process, reduces labor and material costs, and can be adapted to automated mass production. It has extremely high industrial application value.

[0022] 5. This invention forms a composite sealing and protection system through a double-layer sealing structure of inner elastic adaptive sealant and outer thin-layer sealant, which takes into account both dynamic gap adaptability and static sealing durability. It can adapt to complex outdoor working conditions such as high and low temperatures and wind and rain erosion, and greatly expands the application scenarios of aluminum alloy profile assembly structures. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart illustrating an assembly method for an aluminum alloy profile with adaptive sealing, as provided in an embodiment of the present invention.

[0025] Figure 2This is a schematic diagram of the cross-sectional structure of an aluminum alloy profile and an adaptive sealing groove provided in an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the overall structure of an adaptive elastic sealing assembly provided in an embodiment of the present invention.

[0027] Figure 4 This invention provides a schematic diagram of material splicing gap detection and adaptive sealing deformation state in an embodiment of the invention. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1 As shown, this embodiment of the invention provides a method for assembling an aluminum alloy profile with adaptive sealing, comprising the following steps: Step S1, Profile pretreatment: Grind, degrease and remove rust from the splicing end faces of the two sets of aluminum alloy profiles to be assembled to ensure that the flatness error of the splicing end faces is ≤0.02mm. Matching adaptive sealing grooves are pre-cut on the splicing side of the two sets of aluminum alloy profiles. The adaptive sealing grooves are stepped groove structures. Step S2, Pre-installation of the sealing assembly: The adaptive elastic sealing assembly is embedded into the adaptive sealing groove of one set of aluminum alloy profiles to complete the pre-positioning and fixing. The adaptive elastic sealing assembly includes an elastic base, adaptive deformation protrusions, and limiting positioning strips. (Refer to...) Figure 2 and Figure 3 ; Step S3, gap detection and alignment: The two sets of aluminum alloy profiles are spliced ​​and aligned, and the assembly gap value at the splicing point of the two sets of profiles is detected in real time by a high-precision gap detection device to obtain gap fluctuation range data; Step S4, Adaptive Sealing Fit: Based on the detected assembly gap value, the two sets of profiles are compressed to cause controllable elastic deformation of the adaptive elastic sealing component. The adaptive deformation protrusions automatically fill the splicing gap, achieving adaptive sealing fit for different gap sizes. (Refer to...) Figure 4 ; Step S5, graded locking and shaping: The two sets of aluminum alloy profiles after splicing are positioned and locked using a graded locking method. First, the profiles are lightly pre-tightened to fix their alignment, and then pressure is gradually applied to lock the deformation sealing state of the adaptive elastic sealing component. Step S6, sealing verification and finalization: After locking, the airtightness of the sealing performance at the profile splice is tested. Once qualified, the overall assembly is completed.

[0030] In step S1, the stepped groove structure of the adaptive sealing groove includes a shallow positioning groove and a deep deformation groove. The shallow positioning groove matches the limiting positioning strip, and the deep deformation groove provides deformation buffer space for the adaptive deformation protrusion. The groove width of the adaptive sealing groove is set to 5-12mm, and the groove depth is set to 3-8mm. In step S1, during the pretreatment process, grinding is carried out with 800-grit and 1200-grit sandpaper in stages, degreasing is done with anhydrous ethanol wiping, and rust removal is done with weak acid passivation treatment. After treatment, the splicing end face of the profile is free of burrs and oxide layer.

[0031] Step S2: The elastic matrix of the adaptive elastic sealing component is made of modified EPDM rubber with a hardness of 60-75HA, tensile strength ≥18MPa, and elongation at break ≥450%, suitable for high and low temperature deformation environments. During the pre-assembly of the sealing component, the limiting positioning strip and the shallow positioning groove are interference-fitted with an interference amount of 0.1-0.3mm to ensure the sealing component is free from offset and loosening. After pre-assembly, the height of the sealing component protruding from the profile end face is 1-2mm. In Step S3, the high-precision gap detection equipment uses a laser gap sensor with a detection accuracy ≤0.01mm and a single detection response time ≤0.5s. It collects the maximum, minimum, and average values ​​of the splicing gap in real time, generating a gap fluctuation data curve.

[0032] like Figure 2 and Figure 3 As shown, the aluminum alloy profile body 1 is provided with a stepped adaptive sealing groove 2-1 and a shallow positioning groove 2-2. The stepped adaptive sealing groove 2-1 is located on the splicing side of the aluminum alloy profile body 1 and is perpendicularly connected to the splicing end face 3 of the profile. The aluminum alloy profile body 1 supports the sealing structure and provides a basic framework for assembly. The stepped adaptive sealing groove 2-1 is interference-fitted with the limiting structure of the sealing component to achieve pre-positioning of the sealing component and prevent displacement and loosening. The shallow positioning groove 2-2 provides buffer space for the deformed part of the sealing component to prevent the structure from jamming during compression. The splicing end face 3 of the profile ensures the flatness of the splice and provides a flat contact surface for sealing and bonding.

[0033] The limiting positioning strip 4 and the adaptive deformation protrusion 5 are both integrally formed on the elastic substrate 1-1, forming a single structure. The limiting positioning strip 4 is located at the bottom, and the adaptive deformation protrusion 5 is located at the top. The elastic substrate 1-1 provides overall elastic support, adapting to high and low temperature environments and ensuring long-term durability. The limiting positioning strip 4 cooperates with the shallow positioning groove 2-2 to achieve positioning and prevent deviation. The adaptive deformation protrusion 5 automatically compresses and deforms according to the assembly gap, filling the gap and achieving adaptive sealing.

[0034] In step S4, the adaptive deformation protrusion is an arc-shaped, gradually changing protrusion structure with a height of 2-5mm. It can adaptively compress and deform according to the assembly gap difference of 0.1-3mm, and the deformation rebound error is ≤0.05mm. In step S5, the graded locking method is divided into three levels of locking: the first level pre-tightening locking torque is 3-5N·m, the second level pressurizing locking torque is 8-12N·m, and the third level shaping locking torque is 15-18N·m. After each level of locking, the pressure is held for 10-15s. In step S6, the airtightness test is performed using the air pressure test method. The test pressure is 0.3-0.5MPa, the pressure holding time is 30s, and the pressure drop is ≤0.02MPa to be considered a qualified seal. In step S6, after assembly, a thin layer of waterproof sealant with a thickness of 0.5-1mm is applied to the outside of the profile splice gap to form a double-layer sealing and protective structure, improving the overall sealing durability.

[0035] like Figure 4 As shown, the adaptive elastic sealing component 9 is pre-installed in the sealing groove of the first aluminum alloy profile 6. The first aluminum alloy profile 6 and the second aluminum alloy profile 7 are joined together, and the adaptive deformation protrusion 5 is compressed to fill the splicing gap 8. The laser gap sensor 10 is aligned with the splicing gap 8 and collects gap data in real time. The limiting positioning strip 4 fixes the position of the adaptive elastic sealing component 9 and does not shift with deformation. The adaptive deformation protrusion 5 is controllably compressed to completely fill the gap, eliminating voids and excessive compression. The profile splicing gap 8 is the fluctuating gap generated by processing / assembly and serves as the object of sealing compensation. The laser gap sensor 10 detects the gap and provides data for deformation control.

[0036] Example 1 This embodiment provides a method for assembling aluminum alloy profiles with adaptive sealing. The method is for splicing and assembling 6063-T5 aluminum alloy profiles used in building curtain walls. The profile cross-section is 80×45mm and the thickness is 2.0mm. The specific assembly steps are as follows: Step S1, Profile Pre-treatment: Select two sets of 6063-T5 aluminum alloy profiles to be assembled. First, use 800-grit sandpaper for rough grinding to remove burrs and protrusions from the splicing end faces, then use 1200-grit sandpaper for fine grinding and polishing to ensure the end faces are flat and smooth. Next, use anhydrous ethanol to thoroughly wipe the splicing end faces and sides to remove surface oil and dust. Finally, use a weak acid passivation solution for rust removal and passivation treatment, and allow it to air dry for 30 minutes. After pre-treatment, check the flatness of the splicing end faces to ensure a flatness error ≤ 0.02mm. A stepped adaptive sealing groove is opened at the center of the side of the splicing of the two sets of profiles. The shallow positioning groove is 6mm wide and 2mm deep, and the deep deformation groove is 8mm wide and 4mm deep. The overall sealing groove is free of burrs and deformation, and the groove body is flat and uniform.

[0037] Step S2, Pre-installation of the sealing component: An adaptive elastic sealing component is prepared. The elastic matrix is ​​made of modified EPDM rubber with a hardness of 65HA, tensile strength of 20MPa, and elongation at break of 480%. An integrally molded limiting positioning strip and an arc-shaped adaptive deformation protrusion are provided. The limiting positioning strip is 6.2mm wide and forms a 0.2mm interference fit with the shallow positioning groove. The initial height of the adaptive deformation protrusion is 3mm. The sealing component is embedded entirely into the adaptive sealing groove of the profile and pressed firmly to ensure that the limiting positioning strip is completely engaged in the shallow positioning groove without loosening or shifting. After pre-installation, the sealing component protrudes 1.5mm from the splicing end face of the profile, completing the pre-positioning and fixing.

[0038] Step S3, Gap Detection and Alignment: The profile with the pre-installed sealing component is precisely aligned with another set of profiles to be spliced. A high-precision laser gap sensor is used to perform full-area detection of the splicing gap. The sensor has a detection accuracy of 0.01mm and a response time of 0.3s. Ten sets of gap data are continuously collected. The measured gap fluctuation range of this profile splicing is 0.8-1.5mm, with an average gap of 1.1mm. A gap fluctuation data curve is generated to confirm that the gap is within the controllable deformation range of the adaptive sealing component.

[0039] Step S4, Adaptive Sealing Fit: Based on the measured average gap of 1.1mm, the two sets of profiles are slowly squeezed using a hydraulic fine-tuning device, with the squeezing speed controlled at 0.2mm / s. This causes the adaptive deformation protrusion to undergo controllable compression deformation, compressing the protrusion from the initial 3mm to 1.9mm, completely filling the fluctuating gap of 0.8-1.5mm. This achieves a tight fit across the entire splicing seam, with no voids or excessive compression, and good uniformity of sealing fit.

[0040] Step S5, graded locking and shaping: The bolt locking assembly is used for three-level graded locking. The first level is a pre-tightening locking torque of 4 N·m, held for 12 seconds, to fix the alignment of the two sets of profiles and prevent displacement; the second level is a pressurizing locking torque of 10 N·m, held for 12 seconds, to initially lock the deformation state of the sealing assembly; the third level is a shaping locking torque of 16 N·m, held for 15 seconds, to completely fix the profile splicing structure, lock the adaptive sealing deformation state, and ensure that the sealing structure has no rebound or loosening.

[0041] Step S6, Sealing Verification and Completion: After assembly and locking, an airtightness test is conducted using a pneumatic pressure test method. The test pressure is 0.4 MPa, and the pressure is maintained for 30 seconds. The pressure drop is 0.012 MPa, which is less than the 0.02 MPa threshold, indicating that the sealing performance is qualified. Subsequently, a 0.8 mm thick layer of neutral silicone waterproof sealant is evenly applied to the outside of the profile splicing gaps to form a double-layer sealing and protective structure. After natural curing for 24 hours, the overall profile assembly is completed.

[0042] To verify the superiority of the method of the present invention, a traditional fixed sealing assembly process was set as a comparative example, and comparative tests were conducted on sealing performance, adaptability, and service life. The test results are as follows: 1. Gap adaptability test: 100 sets of profile splicing samples with gap fluctuations of 0.1-3mm were selected. Traditional processes can only adapt to fixed gaps of 0.5-1mm, with an adaptability qualification rate of 83%. Gap deviations all resulted in sealing failure. The method of this invention can fully cover all gap fluctuations of 0.1-3mm, with an adaptability qualification rate of 100% and no sealing failure issues.

[0043] 2. Sealing stability test: The two groups of samples were placed in an outdoor high and low temperature cycle environment (-20℃~60℃) for 30 days. The samples of the traditional process showed cracking of the sealing strip and water seepage in the gaps, with a sealing failure rate of 28%. The samples of the present invention showed no water seepage, no dust ingress, no sealing deformation or aging, and the sealing performance remained intact.

[0044] 3. Assembly accuracy test: Traditional manual assembly has an assembly accuracy error of 0.3-0.8mm and an assembly pass rate of 84%; the present invention uses quantitative detection, adaptive deformation and graded locking, and the assembly accuracy error is ≤0.05mm, with an assembly pass rate of 99.5%.

[0045] Comparative experiments clearly demonstrate that the process parameters of this invention are: a sealing groove with a width of 5-12mm and a depth of 3-8mm, adaptable to mainstream industrial and architectural aluminum alloy profile specifications; a sealing component hardness of 60-75HA, balancing deformation adaptability and structural strength, avoiding excessive softness leading to deformation and excessive hardness preventing adaptive adjustment; a three-level gradient locking torque that increases progressively, enabling precise locking of sealing deformation and preventing damage to the sealing structure caused by excessive instantaneous pressure; and airtightness testing parameters that conform to the general standards of the profile sealing industry, ensuring accurate and reliable test results. This invention, through its innovative adaptive sealing structure and graded assembly process, completely solves the core problems of poor sealing adaptability and insufficient stability in existing technologies. Compared to traditional processes, it possesses outstanding creativity and practicality, resulting in significant technological improvements. The method of this invention is not only applicable to the 6063-T5 architectural aluminum alloy profile of this embodiment, but also compatible with 6061, 7075 and other series of industrial aluminum alloy profiles. It can be widely used in various scenarios that require precision sealing assembly, such as building curtain walls, door and window frames, photovoltaic brackets, industrial equipment frames, and rail transit aluminum alloy accessories. It has a wide range of applications and high promotion value.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for assembling aluminum alloy profiles with adaptive sealing, characterized in that, Includes the following steps: Step S1, Profile pretreatment: Grind, degrease and remove rust from the splicing end faces of the two sets of aluminum alloy profiles to be assembled to ensure that the flatness error of the splicing end faces is ≤0.02mm. Matching adaptive sealing grooves are pre-cut on the splicing side of the two sets of aluminum alloy profiles. The adaptive sealing grooves are stepped groove structures. Step S2, Pre-installation of sealing components: The adaptive elastic sealing component is embedded into the adaptive sealing groove of one set of aluminum alloy profiles to complete the pre-positioning and fixing. The adaptive elastic sealing component includes an elastic matrix, adaptive deformation protrusions and limiting positioning strips. Step S3, gap detection and alignment: The two sets of aluminum alloy profiles are spliced ​​and aligned, and the assembly gap value at the splicing point of the two sets of profiles is detected in real time by a high-precision gap detection device to obtain gap fluctuation range data; Step S4, Adaptive sealing fit: Based on the assembly gap value obtained by detection, the two sets of profiles are squeezed to make the adaptive elastic sealing component undergo controllable elastic deformation. The adaptive deformation protrusion automatically fills the splicing gap to achieve adaptive sealing fit of different gap sizes. Step S5, graded locking and shaping: The two sets of aluminum alloy profiles after splicing are positioned and locked using a graded locking method. First, the profiles are lightly pre-tightened to fix their alignment, and then pressure is gradually applied to lock the deformation sealing state of the adaptive elastic sealing component. Step S6, sealing verification and finalization: After locking, the airtightness of the sealing performance at the profile splice is tested. Once qualified, the overall assembly is completed.

2. The assembly method for aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, In step S1, the stepped groove structure of the adaptive sealing groove includes a shallow positioning groove and a deep deformation groove. The shallow positioning groove matches the limiting positioning strip, and the deep deformation groove provides deformation buffer space for the adaptive deformation protrusion. The groove width of the adaptive sealing groove is set to 5-12mm, and the groove depth is set to 3-8mm.

3. The assembly method for aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, Step S2: The elastic matrix of the adaptive elastic sealing component is made of modified EPDM rubber with a hardness of 60-75HA, tensile strength ≥18MPa, and elongation at break ≥450%, making it suitable for high and low temperature deformation environments.

4. The method for assembling aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, In step S3, the high-precision gap detection equipment uses a laser gap sensor with a detection accuracy of ≤0.01mm and a single detection response time of ≤0.5s. It collects the maximum, minimum and average values ​​of the splicing gap in real time and generates a gap fluctuation data curve.

5. The method for assembling an aluminum alloy profile with adaptive sealing according to claim 1, characterized in that, In step S4, the adaptive deformation protrusion is an arc-shaped gradually changing protrusion structure with a protrusion height of 2-5mm. It can undergo adaptive compression deformation according to the assembly gap difference of 0.1-3mm, and the deformation springback error is ≤0.05mm.

6. The method for assembling aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, In step S5, the graded locking method is divided into three levels of locking: the first level pre-tightening locking torque is 3-5 N·m, the second level pressurizing locking torque is 8-12 N·m, and the third level shaping locking torque is 15-18 N·m. After each level of locking, the pressure is maintained for 10-15 seconds.

7. The assembly method for aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, In step S1, during the pretreatment process, the grinding is carried out by using 800-grit and 1200-grit sandpaper for fine grinding, the degreasing is done by wiping with anhydrous ethanol, and the rust removal is done by passivation with weak acid. After treatment, the splicing end face of the profile is free of burrs and oxide layer.

8. The method for assembling aluminum alloy profiles with adaptive sealing according to claim 1, characterized in that, In step S2, during the pre-assembly of the sealing component, the limiting positioning strip and the shallow positioning groove are interference-fitted with an interference amount of 0.1-0.3mm to ensure that the sealing component is not offset or loose. After pre-assembly, the height of the sealing component protruding from the end face of the profile is 1-2mm.

9. The method for assembling an aluminum alloy profile with adaptive sealing according to claim 1, characterized in that, In step S6, the airtightness test is performed using the air pressure test method. The test pressure is 0.3-0.5MPa, the pressure holding time is 30s, and the pressure drop is ≤0.02MPa to be considered as a qualified seal.

10. The method for assembling an aluminum alloy profile with adaptive sealing according to claim 1, characterized in that, In step S6, after assembly, a thin layer of waterproof sealant is applied to the outside of the profile splice gap. The sealant thickness is 0.5-1mm to form a double-layer sealing and protective structure, which improves the overall sealing durability.

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