A production method of an energy-saving curtain wall material based on aluminum plates

Abstract

The present invention relates to the field of defect detection technology, and in particular to a method for producing energy-saving curtain wall materials based on aluminum plates. The present invention determines a fold to be processed on the aluminum plate to mark a bending feature area, screens the bending defect risk area according to the area image and the fold to be processed, and bends the aluminum plate in sections. The feature monitoring time window is determined according to the position distribution of the bending defect risk area, and each bending defect risk area on the aluminum plate is irradiated to obtain the reflected light intensity, and the bending defect characterization value of each bending defect risk area is determined to determine whether there is a bending defect in the segmented bending. The bent aluminum plate is punched, welded, and surface-treated to complete the processing of the aluminum plate material. Furthermore, in the production process of the energy-saving curtain wall material based on the aluminum plate, the present invention realizes rapid detection and identification of the bending defect risk area, adaptively adjusts the detection means, and improves the yield of the aluminum plate, thereby improving the overall quality of the curtain wall.

Description

Technical Field

[0001] The present invention relates to the technical field of defect detection, and in particular to a method for producing energy-saving curtain wall materials based on aluminum plates. Background Art

[0002] At a time when the modern construction industry is booming, curtain walls, as an important part of building envelope structures, are receiving more and more attention for their performance and quality. Aluminum plates, with their many advantages, are gradually emerging in the field of curtain wall materials. Aluminum plates have good plasticity and can be processed into various shapes and sizes to meet diverse architectural design needs, providing more possibilities for innovation in building appearance. In the production process of energy-saving curtain wall materials based on aluminum plates, the aluminum plate bending process is an extremely critical link, which has a profound impact on the quality, performance and production energy consumption of curtain wall materials. Traditional aluminum plate bending processes mostly use relatively extensive operation methods and lack precision in bending speed and pressure control. Fixed speed and pressure parameters are usually used. This results in the inability to make targeted adjustments when facing aluminum plates with different texture directions, thicknesses and hardness, reducing the yield of aluminum plates and may also cause difficulties in subsequent curtain wall installation, affecting the overall quality and aesthetics of the curtain wall. Therefore, improving the yield of aluminum plates and thus improving the overall quality and aesthetics of curtain walls are technical issues that need to be solved urgently.

[0003] For example, the Chinese patent authorization announcement number is: CN117288099B. This invention relates to the field of production quality inspection technology, specifically, to a method for production quality inspection and analysis of aluminum-plastic composite panels based on machine vision. This invention performs basic design quality inspection, aluminum core integration quality inspection and coating adhesion quality inspection on the target aluminum-plastic composite panel in the production quality inspection area in sequence. The aluminum core integration quality inspection is combined with its egg-tray conical structure, and a comprehensive analysis is conducted from two perspectives: the egg-tray structure of the aluminum core of the target aluminum-plastic composite panel and the fitting degree evaluation coefficient between the aluminum plate and the plastic plate. This makes up for the lack of or insufficient consideration of this level in the existing methods. The coating adhesion quality inspection is a detailed and accurate analysis from the two levels of coating spraying quality and coating flatness, which effectively avoids the single limitation of the existing method, realizes the detailed distinction of the production inspection links of the target aluminum-plastic composite panel and the layer-by-layer control of production quality, thereby improving the overall quality and inspection efficiency of the aluminum-plastic composite panel.

[0004] The following problems also exist in the prior art:

[0005] The existing technology does not take into account that in the production of curtain wall materials, due to different curtain wall requirements, the creases of the aluminum plates will be different, and the difference in the direction of the creases and the grain of the aluminum plates will affect the yield of the aluminum plates. In the production process of energy-saving curtain wall materials based on aluminum plates, the present invention cannot quickly detect and identify the risk areas of bending defects, and cannot adaptively adjust the detection means, which reduces the yield of the aluminum plates and thus affects the overall quality of the curtain walls. Summary of the Invention

[0006] To this end, the present invention provides a method for producing energy-saving curtain wall materials based on aluminum plates, which is used to overcome the problems in the prior art of being unable to quickly detect and identify bending defect risk areas during the production process of energy-saving curtain wall materials based on aluminum plates, and unable to adaptively adjust the detection means, thereby reducing the yield of the aluminum plates and affecting the overall quality of the curtain wall.

[0007] To achieve the above object, the present invention provides a method for producing an energy-saving curtain wall material based on an aluminum plate, comprising:

[0008] Obtaining a rolled aluminum plate, determining a crease to be processed on the aluminum plate according to processing requirements, and marking a plurality of bending feature areas according to the crease to be processed;

[0009] The bending feature area includes a first bending sub-area and a second bending sub-area symmetrically arranged with respect to the fold to be processed as a reference;

[0010] Acquire a regional image of the bending feature region, determine a texture stress characterization value of each bending feature region based on the regional image and the crease to be processed, and screen the bending defect risk region based on the texture stress characterization value;

[0011] In response to the screening result of the existence of the bending defect risk area, the aluminum plate is segmentedly bent at the crease to be processed, and a feature monitoring time window is selected during the segmented bending process according to the position distribution of the bending defect risk area;

[0012] Wherein, the characteristic monitoring time window is set during the first bending section of the segmented bending;

[0013] Illuminating each bending defect risk area on the aluminum plate with a light source of preset intensity, obtaining the reflected light intensity of the first bending sub-area and the second bending sub-area within the characteristic monitoring time window, to determine the bending defect characterization value of each bending defect risk area, and determining whether a bending defect exists in the segmented bending process based on the comparison of the bending defect characterization values;

[0014] The aluminum plate that has been bent in several sections is punched, welded and surface treated to complete the processing of the aluminum plate material.

[0015] Furthermore, the bending feature area is a closed area with the crease to be processed as the axis of the area.

[0016] Furthermore, determining the texture stress characterization quantity of each bending feature area includes:

[0017] Acquire a plurality of aluminum plate texture directions corresponding to the bending feature area according to the area image;

[0018] The maximum angle between the texture direction of each aluminum plate and the direction of the crease to be processed is determined as the characteristic angle;

[0019] The maximum value of the plurality of characteristic characterization angles is determined as the texture stress characterization amount.

[0020] Furthermore, the bending defect risk area is screened based on the texture stress characterization quantity of the bending feature area and the determination result of the defect determination condition, wherein:

[0021] If the texture stress characterization value of the bending feature area meets the defect judgment condition, the bending feature area is screened as a bending defect risk area;

[0022] The defect determination condition is that the texture stress characterization value exceeds a preset texture stress characterization threshold.

[0023] Furthermore, the number of segmented bending is determined according to the average value of the texture stress characterization quantity corresponding to each bending defect risk area, and each segment bending completes the bending of the aluminum plate at a preset angle;

[0024] The number of segmentations is positively correlated with the average value of the texture stress representation.

[0025] Furthermore, determining the location distribution of the bending defect risk area includes:

[0026] Calculating the vertical distance from the center point of the bending defect risk area to the edge of the aluminum plate, and determining the minimum value of the vertical distance as the bending distribution coefficient;

[0027] If the bending distribution coefficient meets the first bending distribution condition, determining that the position distribution of the bending defect risk area is a first bending distribution category;

[0028] If the bending distribution coefficient does not meet the first bending distribution condition, determining that the position distribution of the bending defect risk area is a second bending distribution category;

[0029] The first bending distribution condition is that the bending distribution coefficient does not exceed a preset bending distribution coefficient reference value.

[0030] Furthermore, the method of selecting the feature monitoring time window includes:

[0031] If the position distribution is the first bend distribution category, the start time of the first bend in the segmented bend is used as the starting time of the characteristic monitoring time window, and the time window with the preset monitoring time duration is selected as the characteristic monitoring time window;

[0032] If the position distribution is the second bend distribution category, the end time of the first bend in the segmented bend is used as the end time of the characteristic monitoring time window, and the time window with the preset monitoring time length is selected as the characteristic monitoring time window.

[0033] Furthermore, the process of determining the bending defect characterization value includes:

[0034] A difference between the reflected light intensity of the first bending sub-region and the reflected light intensity of the second bending sub-region is calculated, and the difference is determined as a bending defect characterization value of the bending defect risk region.

[0035] Furthermore, the comparison conditions for determining the bending defect characterization value include:

[0036] Obtaining bending defect characterization values for each bending defect risk area;

[0037] The variance of the plurality of bending defect characterization values is calculated, and the variance is determined as a comparison of the bending defect characterization values.

[0038] Furthermore, determining whether there is a bending defect in the segmented bending process includes:

[0039] If the comparison of the bending defect characterization values does not meet the normal bending conditions, it is determined that the segmented bending has a bending defect;

[0040] If the comparison of the bending defect characterization values meets the normal bending conditions, it is determined that there is no bending defect in the segmented bending;

[0041] The normal bending condition is that the variance of a plurality of bending defect characterization values does not exceed a preset bending defect reference value.

[0042] Compared with the prior art, the present invention has the following advantages: by obtaining the rolled aluminum plate, the present invention determines the crease to be processed on the aluminum plate according to the processing requirements, marks a number of bending feature areas according to the crease to be processed, determines the texture stress characterization amount of each bending feature area according to the regional image and the crease to be processed, screens the bending defect risk area based on the texture stress characterization amount, and in response to the screening result of the bending defect risk area, performs segmented bending on the aluminum plate, determines the characteristic monitoring time window for detecting the segmented bending process according to the position distribution of the bending defect risk area, and uses a light source of preset intensity to monitor the bending defect risk areas on the aluminum plate. The risk area is irradiated, and the reflected light intensity of the first bending sub-area and the second bending sub-area is obtained respectively within the characteristic monitoring time window to determine the bending defect characterization value of each bending defect risk area. According to the comparison of the bending defect characterization values, it is determined whether there is a bending defect in the segmented bending. The bent aluminum plate is punched, welded and surface treated to complete the processing of the aluminum plate material. Furthermore, in the production process of energy-saving curtain wall materials based on aluminum plates, the bending defect risk area can be quickly detected and identified, the detection means can be adaptively adjusted, and the yield of the aluminum plate can be improved, thereby improving the overall quality of the curtain wall.

[0043] In particular, the present invention determines the texture stress characterization amount of each bending feature area based on the regional image and the fold to be processed. It can be understood that the regional image of each bending feature area can obtain the texture direction of the aluminum plate in the bending feature area, and calculating the angle between the aluminum plate texture direction and the fold to be processed can characterize the parallelism of the two, and quantify the positional relationship between the aluminum plate texture and the fold to be processed. The parallelism will affect the stress distribution and mechanical properties during the bending process. The present invention determines the texture stress characterization amount of each bending feature area through the regional image and the fold to be processed, and further realizes the rapid detection of bending defect risks in the production process of energy-saving curtain wall materials based on aluminum plates, thereby improving the yield of aluminum plates and thus improving the overall quality of curtain walls.

[0044] In particular, the present invention screens the bending defect risk area through the texture stress characterization quantity. It can be understood that the texture stress characterization quantity characterizes the degree of parallelism between the texture direction of the aluminum plate and the fold to be processed. The larger the texture stress characterization quantity, the higher the degree of parallelism between the texture direction of the aluminum plate and the fold to be processed. In the bending process, due to the high degree of parallelism between the texture direction and the fold direction, the internal crystal structure of the aluminum plate is more likely to slip along the texture direction when subjected to force, and the bonding force between the grains is more easily destroyed under the action of the bending force, and the risk of cracking of the aluminum plate is greater. The present invention screens the bending defect risk area through the texture stress characterization quantity, and further realizes the rapid detection and identification of the bending defect risk area in the production process of energy-saving curtain wall materials based on aluminum plates, thereby improving the yield of aluminum plates and thus improving the overall quality of the curtain walls.

[0045] In particular, the present invention performs segmented bending on the aluminum plate in response to the screening results of the risk areas for bending defects. The risk areas for bending defects are areas where the direction of the aluminum plate's grain and the fold to be processed are relatively parallel. In areas with a high degree of parallelism, stress will be concentrated in a direction parallel to the grain during bending, which can easily exceed the material's bearing limit and cause defects such as cracking. By adopting segmented bending, the concentrated stress can be dispersed to the bending process of multiple small segments. The stress generated by each bending segment is relatively small, and it is not easy for the stress to accumulate to a level that causes material defects, thereby reducing the risk of defects such as cracks in the aluminum plate during the bending process. At the same time, in the segmented bending process, if the bending effect of the first segment is defective, it can be discovered in time. The present invention performs segmented bending on the aluminum plate in response to the screening results of the risk areas for bending defects, thereby achieving rapid detection and identification of bending defect risk areas in the production process of energy-saving curtain wall materials based on aluminum plates, improving the yield of aluminum plates, and thus improving the overall quality of curtain walls.

[0046] In particular, the present invention determines the characteristic monitoring time window for detecting the segmented bending process according to the position distribution of the bending defect risk area. It can be understood that the distance from the bending defect area to the edge of the aluminum plate is different, and the timing of bending anomalies during the bending process is also different. When the bending defect risk area is far away from the edge of the aluminum plate, during the segmented bending process of the aluminum plate, since the constraint of the area far away from the edge is relatively small, the stress distribution inside the material after bending is uneven, and there will be a stronger tendency to try to recover to its original state, thereby generating a rebound phenomenon. The rebound will cause the bending angle to change, and the rebound is easy to appear when the bending process is about to be completed. Therefore, for the bending defect risk area far away from the edge of the aluminum plate, it is necessary to monitor it for a period of time before the bending process is completed to capture the bending anomaly caused by the rebound. When the bending defect risk area is close to the edge of the aluminum plate, During the bending process, the material at the edge is less constrained during bending and is more likely to produce larger displacement and deformation under the action of force. Moreover, due to its proximity to the edge, the stress concentration effect of the material is more obvious, which increases the possibility of excessive deformation. Obvious signs of excessive deformation will appear within a short period of time after the start of bending. Therefore, for the bending defect risk area close to the edge of the aluminum plate, during the bending process, monitoring can be carried out immediately after the start of bending to determine whether there is a bending anomaly caused by excessive deformation. The present invention determines the characteristic monitoring time window for detecting the segmented bending process through the position distribution of the bending defect risk area, thereby realizing rapid detection and identification of the bending defect risk area in the production process of energy-saving curtain wall materials based on aluminum plates, adaptively adjusting the detection means, and improving the yield of the aluminum plate, thereby improving the overall quality of the curtain wall.

[0047] In particular, the present invention irradiates each bending defect risk area on the aluminum plate, and determines whether there is a bending defect in the segmented bending according to the reflected light intensity of the first bending sub-area and the second bending sub-area. It can be understood that when the surface of the aluminum plate is uneven, cracked, excessively deformed or twisted, the surface microstructure and macrostructure of the aluminum plate change, and these changes will cause different light reflection conditions. The smaller the difference in reflected light intensity between the first bending sub-area and the second bending sub-area, the smaller the bending defect characterization value, and the flatter the bending defect risk area, the greater the difference in reflected light intensity between the first bending sub-area and the second bending sub-area, the greater the bending defect characterization value, and the more representative the bending defect risk area. The more uneven the risk area is, the greater the variance of the bending defect characterization value is, the greater the difference in surface flatness characterizing the crease to be processed is, and the presence of bending defects in the segmented bending is. The present invention irradiates each bending defect risk area on the aluminum plate, determines the bending defect characterization value of each bending defect risk area according to the reflected light intensity of the first bending sub-area and the second bending sub-area, and determines whether the segmented bending has a bending defect based on the comparison of the bending defect characterization values. Furthermore, in the production process of energy-saving curtain wall materials based on aluminum plates, rapid detection and identification of bending defect risk areas are achieved, the detection means are adaptively adjusted, the yield of aluminum plates is improved, and the overall quality of the curtain wall is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a step diagram of a method for producing an energy-saving curtain wall material based on an aluminum plate according to an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of a bending feature area according to an embodiment of the present invention;

[0050] Figure 3 A logic flow chart for screening bending defect risk areas according to an embodiment of the present invention;

[0051] Figure 4 A logic flow chart for determining whether a bending defect exists in a segmented bending process according to an embodiment of the present invention;

[0052] In the figure: 1-first bending sub-area; 2-bending feature area; 3-second bending sub-area; 4-crease to be processed; 5-aluminum plate. DETAILED DESCRIPTION

[0053] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0055] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0056] See also Figure 1 As shown, it is a step diagram of a method for producing an energy-saving curtain wall material based on an aluminum plate according to an embodiment of the present invention. A method for producing an energy-saving curtain wall material based on an aluminum plate according to the present invention comprises:

[0057] Step S100, obtaining a rolled aluminum plate, determining a crease to be processed on the aluminum plate according to processing requirements, and marking a plurality of bending feature areas according to the crease to be processed;

[0058] The bending feature area includes a first bending sub-area and a second bending sub-area symmetrically arranged with respect to the fold to be processed as a reference;

[0059] Specifically, rolling is a conventional production process for the production of curtain wall materials based on aluminum plates. After aluminum ingots or scrap aluminum are smelted and cast to form billets, they are rolled through multiple passes in hot rolling or cold rolling mills to gradually reduce the thickness and adjust the shape, and finally made into aluminum plates of the required specifications. During the cold rolling process, spindle-shaped or strip-shaped textures will form on the surface of the aluminum plate. The directions of these textures may be consistent with the main orientation of the grains, or there may be certain angle differences. This difference will lead to inconsistent surface texture directions, which will not be discussed here.

[0060] Step S200, obtaining a regional image of the bending feature region, determining a texture stress characterization value of each bending feature region based on the regional image and the fold to be processed, and screening bending defect risk regions based on the texture stress characterization value;

[0061] Step S300, in response to the screening result of the existence of the bending defect risk area, the aluminum plate is segmentedly bent at the crease to be processed, and a feature monitoring time window is selected during the segmented bending process according to the position distribution of the bending defect risk area;

[0062] Wherein, the characteristic monitoring time window is set during the first bending section of the segmented bending;

[0063] Step S400: Illuminating each bending defect risk area on the aluminum plate with a light source of preset intensity, obtaining the reflected light intensity of the first bending sub-area and the second bending sub-area within the characteristic monitoring time window, to determine a bending defect characterization value for each bending defect risk area, and determining whether a bending defect exists in the segmented bending process based on a comparison of the bending defect characterization values;

[0064] Specifically, the present invention does not specifically limit the manner in which each bending defect risk area on the aluminum plate is irradiated. Preferably, it can use a parallel light source to fix the laser parallel light source above the aluminum plate to accurately illuminate the bending area, so that the light intensity received by each bending defect risk area is relatively consistent, which facilitates the subsequent accurate acquisition and comparison of the reflected light intensity, which will not be repeated here.

[0065] Specifically, the preset intensity of the light source may be set by those skilled in the art according to the precision requirements of curtain wall material production. Preferably, the preset intensity of the light source may be 5000 lux.

[0066] Step S500 , punching, welding and surface treatment are performed on the aluminum plate that has been bent in several sections to complete the processing of the aluminum plate material.

[0067] Specifically, punching, welding and surface treatment of aluminum plates that have completed several segmented bends are conventional production processes in the production process of curtain wall materials based on aluminum plates, which are widely used in the field of curtain wall material production and will not be described in detail here.

[0068] Specifically, see Figure 2 As shown, it is a schematic diagram of the bending feature area of an embodiment of the present invention, and the bending feature area is a closed area with the fold to be processed as the axis in the area.

[0069] Specifically, the size of the bending feature area can be set by technical personnel in this field according to the detection accuracy requirements of curtain wall material production. Preferably, the bending feature area can be a closed area of 100mm×50mm with the crease to be processed as the central axis of the area.

[0070] Specifically, the texture stress characterization quantities for each bending feature area are determined as follows:

[0071] Acquire a plurality of aluminum plate texture directions corresponding to the bending feature area according to the area image;

[0072] The maximum angle between the texture direction of each aluminum plate and the direction of the crease to be processed is determined as the characteristic angle;

[0073] The maximum value of the plurality of characteristic characterization angles is determined as the texture stress characterization amount.

[0074] Specifically, the present invention does not specifically limit the method of determining the texture direction of the aluminum plate. Preferably, it can be achieved by an industrial camera in combination with an image processing algorithm. The industrial camera is used to obtain an image of the aluminum plate surface, and the edge detection algorithm is used to extract the direction of the texture in the image. It will not be repeated here.

[0075] Specifically, here is a specific embodiment for determining the texture stress characterization amount of each bending feature area: if it is obtained that there are three different directions of aluminum plate texture directions in the bending feature area A, the angles between the aluminum plate texture direction 1 and the direction of the fold to be processed are 15°, 165°, 15°, and 165°, respectively, where the maximum angle is 165°, and the characteristic characterization angle 1 is 165°; the angles between the aluminum plate texture direction 2 and the direction of the fold to be processed are 22°, 158°, 22°, and 158°, respectively, where the maximum angle is 158°, and the characteristic characterization angle 2 is 158°; the angles between the aluminum plate texture direction 3 and the direction of the fold to be processed are 32°, 148°, 32°, and 148°, respectively, where the maximum angle is 148°, the characteristic characterization angle 3 is 148°, and the maximum value of the characteristic characterization angle is 165°. Therefore, the texture stress characterization amount of the bending feature area A is 165°.

[0076] Specifically, the present invention determines the texture stress characterization amount of each bending feature area based on the regional image and the fold to be processed. It can be understood that the regional image of each bending feature area can obtain the texture direction of the aluminum plate in the bending feature area, and calculating the angle between the aluminum plate texture direction and the fold to be processed can characterize the parallelism of the two, and quantify the positional relationship between the aluminum plate texture and the fold to be processed. The parallelism will affect the stress distribution and mechanical properties during the bending process. The present invention determines the texture stress characterization amount of each bending feature area through the regional image and the fold to be processed, and further realizes the rapid detection of bending defect risks in the production process of energy-saving curtain wall materials based on aluminum plates, thereby improving the yield of aluminum plates and thus improving the overall quality of curtain walls.

[0077] Specifically, see Figure 3 As shown, it is a logic flow chart for screening bending defect risk areas according to an embodiment of the present invention. The bending defect risk areas are screened according to the texture stress characterization quantity of the bending feature area and the judgment result of the defect judgment condition, wherein:

[0078] If the texture stress characterization value of the bending feature area meets the defect judgment condition, the bending feature area is screened as a bending defect risk area;

[0079] If the texture stress characterization value of the bending feature area does not meet the defect judgment condition, the bending feature area is not screened;

[0080] The defect determination condition is that the texture stress characterization value exceeds a preset texture stress characterization threshold.

[0081] Specifically, the preset texture stress characterization threshold can be set by those skilled in the art according to the precision requirements of curtain wall material production. The higher the precision requirement, the smaller the preset texture stress characterization threshold. Preferably, the texture stress characterization threshold can be 160°.

[0082] Specifically, the present invention screens the bending defect risk area through the texture stress characterization quantity. It can be understood that the texture stress characterization quantity characterizes the degree of parallelism between the texture direction of the aluminum plate and the fold to be processed. The larger the texture stress characterization quantity, the higher the degree of parallelism between the texture direction of the aluminum plate and the fold to be processed. During the bending process, due to the high degree of parallelism between the texture direction and the fold direction, the internal crystal structure of the aluminum plate is more likely to slip along the texture direction when subjected to force, and the bonding force between the grains is more easily destroyed under the action of the bending force, and the risk of cracking of the aluminum plate is greater. The present invention screens the bending defect risk area through the texture stress characterization quantity, and further realizes the rapid detection and identification of the bending defect risk area in the production process of energy-saving curtain wall materials based on aluminum plates, thereby improving the yield of aluminum plates and thus improving the overall quality of the curtain wall.

[0083] Specifically, the number of segmented bending is determined according to the average value of the texture stress characterization quantity corresponding to each bending defect risk area, and each segment bending completes the bending of the aluminum plate at a preset angle;

[0084] The number of segmentations is positively correlated with the average value of the texture stress representation.

[0085] Specifically, a specific embodiment of the number of segmented bending is given here: if the texture stress characterization values corresponding to the bending defect risk areas obtained are 165°, 167°, 170°, 163°, and 174°, respectively, the average value of the texture stress characterization value is 167.8°, the number of segmentation times is 4, the bending angle required for processing is 40°, and the preset angle for completing the bending of each segment is 10°.

[0086] Specifically, the present invention performs segmented bending on the aluminum plate in response to the screening results of the risk areas for bending defects. The risk areas for bending defects are areas where the direction of the aluminum plate's texture and the fold to be processed are highly parallel. In areas with high parallelism, stress will be concentrated in the direction parallel to the texture during bending, which can easily exceed the material's bearing limit and cause defects such as cracking. By adopting segmented bending, the concentrated stress can be dispersed to the bending process of multiple small segments. The stress generated by each bending segment is relatively small, and it is not easy for the stress to accumulate to the level that causes material defects, thereby reducing the risk of defects such as cracks in the aluminum plate during the bending process. At the same time, in the segmented bending process, if the bending effect of the first segment is defective, it can be discovered in time. The present invention performs segmented bending on the aluminum plate in response to the screening results of the risk areas for bending defects, thereby achieving rapid detection and identification of bending defect risk areas in the production process of energy-saving curtain wall materials based on aluminum plates, improving the yield of aluminum plates, and thus improving the overall quality of curtain walls.

[0087] Specifically, determining the location distribution of the bending defect risk area includes:

[0088] Calculating the vertical distance from the center point of the bending defect risk area to the edge of the aluminum plate, and determining the minimum value of the vertical distance as the bending distribution coefficient;

[0089] If the bending distribution coefficient meets the first bending distribution condition, determining that the position distribution of the bending defect risk area is a first bending distribution category;

[0090] If the bending distribution coefficient does not meet the first bending distribution condition, determining that the position distribution of the bending defect risk area is a second bending distribution category;

[0091] The first bending distribution condition is that the bending distribution coefficient does not exceed a preset bending distribution coefficient reference value.

[0092] Specifically, the preset bending distribution coefficient reference value can be set by technical personnel in this field according to the precision requirements of curtain wall material production. The higher the precision requirement, the larger the preset bending distribution coefficient reference value. Preferably, the bending distribution coefficient reference value can be 10cm.

[0093] Specifically, here is a specific embodiment for determining the bending distribution coefficient: use image processing software to obtain the distances between the three bending defect risk areas and the edges of the aluminum plate. The vertical distances between the bending defect risk area A and the edges of the aluminum plate are 300mm, 1700mm, 200mm, and 800mm, respectively; the vertical distances between the bending defect risk area B and the edges of the aluminum plate are 1200mm, 800mm, 600mm, and 400mm, respectively; the vertical distances between the bending defect risk area C and the edges of the aluminum plate are 500mm, 1500mm, 800mm, and 200mm, respectively. The minimum value of the vertical distance is 200mm. Therefore, the bending distribution coefficient is 200mm.

[0094] Specifically, the methods for selecting the feature monitoring time window include:

[0095] If the position distribution is the first bend distribution category, the start time of the first bend in the segmented bend is used as the starting time of the characteristic monitoring time window, and the time window with the preset monitoring time duration is selected as the characteristic monitoring time window;

[0096] If the position distribution is the second bend distribution category, the end time of the first bend in the segmented bend is used as the end time of the characteristic monitoring time window, and the time window with the preset monitoring time length is selected as the characteristic monitoring time window.

[0097] Specifically, the preset monitoring time can be set by those skilled in the art according to the accuracy requirements of curtain wall material production. The higher the accuracy requirements, the longer the preset monitoring time. Preferably, the preset monitoring time can be 30s.

[0098] Specifically, the present invention determines the characteristic monitoring time window for detecting the segmented bending process according to the position distribution of the bending defect risk area. It can be understood that the distance from the bending defect area to the edge of the aluminum plate is different, and the timing of bending anomalies during the bending process is also different. When the bending defect risk area is far away from the edge of the aluminum plate, during the segmented bending process of the aluminum plate, since the constraint of the area far away from the edge is relatively small, the stress distribution inside the material after bending is uneven, and there will be a stronger tendency to try to recover to its original state, thereby generating a rebound phenomenon. The rebound will cause the bending angle to change, and the rebound is easy to appear when the bending process is about to be completed. Therefore, for the bending defect risk area far away from the edge of the aluminum plate, it is necessary to monitor it for a period of time before the bending process is completed to capture the bending anomaly caused by the rebound. When the bending defect risk area is close to the edge of the aluminum plate, During the bending process, the material at the edge is subject to less constraint during bending, and is more likely to produce larger displacement and deformation under the action of force. Moreover, due to its proximity to the edge, the stress concentration effect of the material is more obvious, which increases the possibility of excessive deformation. Obvious signs of excessive deformation will appear within a short period of time after the start of bending. Therefore, for the bending defect risk area close to the edge of the aluminum plate, during the bending process, monitoring can be carried out immediately after the start of bending to determine whether there is a bending anomaly caused by excessive deformation. The present invention determines the characteristic monitoring time window for detecting the segmented bending process through the position distribution of the bending defect risk area, thereby realizing rapid detection and identification of the bending defect risk area in the production process of energy-saving curtain wall materials based on aluminum plates, adaptively adjusting the detection means, and improving the yield of the aluminum plate, thereby improving the overall quality of the curtain wall.

[0099] Specifically, the process of determining the bending defect characterization value includes:

[0100] A difference between the reflected light intensity of the first bending sub-region and the reflected light intensity of the second bending sub-region is calculated, and the difference is determined as a bending defect characterization value of the bending defect risk region.

[0101] Specifically, the present invention does not specifically limit the method of obtaining the reflected light intensity of the first bending sub-region and the reflected light intensity of the second bending sub-region. Preferably, it can be obtained by using a spectrometer, aiming the probe of the spectrometer at the first bending sub-region and the second bending sub-region, collecting and analyzing the reflected light, and thus obtaining the reflected light intensity. It will not be repeated here.

[0102] Specifically, the comparison conditions for determining the bending defect characterization value include:

[0103] Obtaining bending defect characterization values for each bending defect risk area;

[0104] The variance of the plurality of bending defect characterization values is calculated, and the variance is determined as a comparison of the bending defect characterization values.

[0105] Specifically, see Figure 4 As shown, it is a logic flow chart for determining whether there is a bending defect in the segmented bending process according to an embodiment of the present invention. Determining whether there is a bending defect in the segmented bending process includes:

[0106] If the comparison of the bending defect characterization values does not meet the normal bending conditions, it is determined that the segmented bending has a bending defect;

[0107] If the comparison of the bending defect characterization values meets the normal bending conditions, it is determined that there is no bending defect in the segmented bending;

[0108] The normal bending condition is that the variance of a plurality of bending defect characterization values does not exceed a preset bending defect reference value.

[0109] Specifically, the preset bending defect reference value can be set by technical personnel in this field according to the precision requirements of curtain wall material production. The higher the precision requirement, the smaller the preset bending defect reference value. Preferably, the bending defect reference value can be 0.2.

[0110] Specifically, the present invention irradiates each bending defect risk area on the aluminum plate, and determines whether there is a bending defect in the segmented bending according to the reflected light intensity of the first bending sub-area and the second bending sub-area. It can be understood that when the surface of the aluminum plate is uneven, cracked, excessively deformed or twisted, the surface microstructure and macrostructure of the aluminum plate change, and these changes will cause different light reflection conditions. The smaller the difference in reflected light intensity between the first bending sub-area and the second bending sub-area, the smaller the bending defect characterization value, and the flatter the bending defect risk area, the greater the difference in reflected light intensity between the first bending sub-area and the second bending sub-area, the greater the bending defect characterization value, and the more representative the bending defect risk area. The more uneven the defect risk area is, the greater the variance of the bending defect characterization value is, the greater the difference in surface flatness characterizing the crease to be processed is, and the presence of bending defects in the segmented bending is. The present invention irradiates each bending defect risk area on the aluminum plate, determines the bending defect characterization value of each bending defect risk area according to the reflected light intensity of the first bending sub-area and the second bending sub-area, and determines whether the segmented bending has a bending defect based on the comparison of the bending defect characterization values. Furthermore, in the production process of energy-saving curtain wall materials based on aluminum plates, rapid detection and identification of bending defect risk areas are achieved, the detection means are adaptively adjusted, and the yield of aluminum plates is improved, thereby improving the overall quality of the curtain wall.

[0111] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0112] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for producing energy-saving curtain wall materials based on aluminum plates, characterized in that: include: Obtaining a rolled aluminum plate, determining a crease to be processed on the aluminum plate according to processing requirements, and marking a plurality of bending feature areas according to the crease to be processed; The bending feature area includes a first bending sub-area and a second bending sub-area symmetrically arranged with respect to the fold to be processed as a reference; Acquire a regional image of the bending feature region, determine a texture stress characterization value of each bending feature region based on the regional image and the crease to be processed, and screen the bending defect risk region based on the texture stress characterization value; In response to the screening result of the existence of the bending defect risk area, the aluminum plate is segmentedly bent at the crease to be processed, and a feature monitoring time window is selected during the segmented bending process according to the position distribution of the bending defect risk area; Wherein, the characteristic monitoring time window is set during the first bending section of the segmented bending; Illuminating each bending defect risk area on the aluminum plate with a light source of preset intensity, obtaining the reflected light intensity of the first bending sub-area and the second bending sub-area within the characteristic monitoring time window, to determine the bending defect characterization value of each bending defect risk area, and determining whether a bending defect exists in the segmented bending process based on the comparison of the bending defect characterization values; The aluminum plate that has been bent in several sections is punched, welded and surface treated to complete the processing of the aluminum plate material.

2. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 1, characterized in that: The bending feature area is a closed area with the crease to be processed as the axis in the area.

3. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 2, characterized in that: The texture stress characterization quantities for each bending feature area are determined as follows: Acquire a plurality of aluminum plate texture directions corresponding to the bending feature area according to the area image; The maximum angle between the texture direction of each aluminum plate and the direction of the crease to be processed is determined as the characteristic angle; The maximum value of the plurality of characteristic characterization angles is determined as the texture stress characterization amount.

4. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 3, characterized in that: According to the texture stress characterization quantity of the bending feature area and the determination result of the defect determination condition, the bending defect risk area is screened, wherein: If the texture stress characterization value of the bending feature area meets the defect judgment condition, the bending feature area is screened as a bending defect risk area; The defect determination condition is that the texture stress characterization value exceeds a preset texture stress characterization threshold.

5. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 4, characterized in that: The number of segmented bending is determined according to the average value of the texture stress characterization quantity corresponding to each bending defect risk area, and each segment bending completes the bending of the aluminum plate at a preset angle; The number of segmentations is positively correlated with the average value of the texture stress representation.

6. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 5, characterized in that: Determining the location distribution of the bending defect risk area includes: Calculating the vertical distance from the center point of the bending defect risk area to the edge of the aluminum plate, and determining the minimum value of the vertical distance as the bending distribution coefficient; If the bending distribution coefficient meets the first bending distribution condition, determining that the position distribution of the bending defect risk area is a first bending distribution category; If the bending distribution coefficient does not meet the first bending distribution condition, determining that the position distribution of the bending defect risk area is a second bending distribution category; The first bending distribution condition is that the bending distribution coefficient does not exceed a preset bending distribution coefficient reference value.

7. The method for producing an energy-saving curtain wall material based on an aluminum plate according to claim 6, characterized in that: Methods for selecting feature monitoring time windows include: If the position distribution is the first bend distribution category, the start time of the first bend in the segmented bend is used as the starting time of the characteristic monitoring time window, and the time window with the preset monitoring time duration is selected as the characteristic monitoring time window; If the position distribution is the second bend distribution category, the end time of the first bend in the segmented bend is used as the end time of the characteristic monitoring time window, and the time window with the preset monitoring time length is selected as the characteristic monitoring time window.

8. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 7, characterized in that: The process of determining the bending defect characterization value includes: A difference between the reflected light intensity of the first bending sub-region and the reflected light intensity of the second bending sub-region is calculated, and the difference is determined as a bending defect characterization value of the bending defect risk region.

9. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 8, characterized in that: The comparisons to determine the bending defect characterization values include: Obtaining bending defect characterization values for each bending defect risk area; The variance of the plurality of bending defect characterization values is calculated, and the variance is determined as a comparison of the bending defect characterization values.

10. The method for producing energy-saving curtain wall materials based on aluminum plates according to claim 9, characterized in that: Determining whether there is a bending defect in the segmented bending process includes: If the comparison of the bending defect characterization values does not meet the normal bending conditions, it is determined that the segmented bending has a bending defect; If the comparison of the bending defect characterization values meets the normal bending conditions, it is determined that there is no bending defect in the segmented bending; The normal bending condition is that the variance of a plurality of bending defect characterization values does not exceed a preset bending defect reference value.

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