Method for detecting high-precision straightness of large-size wide aluminum plate

Abstract

The invention discloses a high-precision straightness detection method for a large-specification wide-width aluminum plate, and relates to the field of straightness detection methods for large-specification wide-width aluminum plates, and the high-precision straightness detection method for the large-specification wide-width aluminum plate comprises the steps of equipment verification, aluminum plate feeding, automatic positioning, straightness measurement, data judgment and aluminum plate discharging. Through a standardized measurement method, detection point density, filler gauge insertion specifications and data recording requirements are defined, dependence on experience of operators is reduced, whole-process safety design is achieved, man-machine separation is achieved through remote control, an emergency stop function, vacuum chuck hoisting and other measures, and safety risks of manual material pushing and adjustment are thoroughly avoided.

Description

Technical Field

[0001] This application relates to the field of methods for testing the straightness of large-format, wide-format aluminum plates, and in particular to a method for testing the high-precision straightness of large-format, wide-format aluminum plates. Background Technology

[0002] When splicing large-format, wide aluminum plates using friction stir welding, the process has strict requirements for the splicing gaps. It is clearly stipulated that the straightness of the entire longitudinal edge of the aluminum plate must be less than or equal to 0.3mm, and the gaps are almost imperceptible to the naked eye after splicing.

[0003] The current traditional manual straightness inspection process has three major problems:

[0004] 1. Excessive manual intervention: The loading and unloading positioning and aluminum plate pushing all rely on manual labor. Inconsistent pushing force and speed lead to large differences in the adhesion between the aluminum plate and the reference surface, resulting in poor repeatability of test data.

[0005] Second, high safety risks: When pushing large aluminum plates by hand, there is a risk of workplace accidents due to plate misalignment or collision, and the reference surface may be scratched during manual adjustment.

[0006] Third, high testing costs: The debugging of the benchmark platform requires professional technicians, resulting in high labor costs; the high rate of rework and scrap due to misjudgment further increases production costs.

[0007] In conclusion, optimizing the testing process is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] In view of this, the purpose of this application is to provide a method for high-precision straightness detection of large-format wide aluminum plates, which shortens the single detection time through automated control push positioning, adapts to the needs of mass production, and improves production efficiency.

[0009] To achieve the above objectives, this application provides a method for high-precision straightness testing of large-format, wide-width aluminum plates, comprising:

[0010] The inspection includes a reference platform and an automated conveying system, wherein the reference platform is made of precision-ground stone; and the automated conveying system includes a conveying platform and a power push rod.

[0011] The overhead crane is controlled to lift the aluminum plate to be tested onto the conveying platform;

[0012] The power push rod is controlled to drive the aluminum plate to move toward the reference platform and completely fit the detection surface of the reference platform;

[0013] Along the length of the aluminum plate, the contact seams between the aluminum plate and the reference platform at several detection positions are detected. If the size of any contact seam does not meet the preset range, the straightness of the aluminum plate is unqualified.

[0014] Preferably, the reference platform is natural granite or artificial marble;

[0015] Alternatively, the flatness of the reference platform is less than or equal to 0.05 mm / m, and the straightness is less than or equal to 0.03 mm / m;

[0016] The base of the reference platform is equipped with multiple adjustable rigid support seats for adjusting the levelness of the reference platform.

[0017] Preferably, the reference platform is composed of multiple segments spliced ​​together.

[0018] Preferably, inspecting the benchmark platform includes:

[0019] Wipe the test surface of the reference platform with a lint-free cloth to ensure it is free of stains and scratches;

[0020] Testing the automated conveying system includes testing the synchronization, operating speed, and emergency stop function of the power push rod to ensure the system operates normally.

[0021] Preferably, controlling the overhead crane to lift the aluminum plate to be tested onto the conveying platform includes: when the overhead crane lifts the aluminum plate onto the conveying platform, the length direction of the aluminum plate is required to be parallel to the reference platform, and the initial distance between the edge of the aluminum plate and the reference platform is controlled within a preset range.

[0022] Preferably, it further includes a feeler gauge for detecting the contact seam; detecting the contact seam between the aluminum plate and the reference platform at several of the detection positions includes:

[0023] Illuminate the contact seam with a light source, insert the feeler gauge from one end of the detection position, and record the feeler gauge specification when there is resistance and no looseness when the feeler gauge is inserted into the detection seam.

[0024] Preferably, the contact seams between the aluminum plate and the reference platform at several detection locations are detected, including:

[0025] If the gap in the contact seam at the detection location is too large, the 1.0mm feeler gauge can be inserted into the contact seam to check whether the aluminum plate is properly fitted, or the aluminum plate can be reversed and reset to re-drive the aluminum plate to contact the reference platform.

[0026] Preferably, controlling the power push rod to drive the aluminum plate to move toward the reference platform and fully fit with the detection surface of the reference platform includes: controlling the power push rod to drive the aluminum plate toward the reference platform, and at a position about 20mm away from the reference platform, the power push rod stops driving, and the locking screw is manually operated to push the wooden block to push the aluminum plate close to the reference platform at a low speed, so that the aluminum plate is stably and tightly fitted with the detection surface of the reference platform, and pressure is maintained after the edge of the aluminum plate is fitted with the detection surface of the reference platform.

[0027] Preferably, after detecting the contact seams between the aluminum plate and the reference platform at several detection positions, the method further includes: after releasing the locking screw, the power push rod drives the aluminum plate back to the crane hoisting position, and the crane hoists the aluminum plate away from the conveying platform.

[0028] Preferably, detecting the contact seam between the aluminum plate and the reference platform at several detection positions includes: the several detection positions are detection positions arranged sequentially at intervals of one meter along the direction of the reference platform.

[0029] Compared with the aforementioned background technology, the method for high-precision straightness testing of large-format, wide-format aluminum plates provided in this application has the following advantages:

[0030] This invention effectively reduces the repeatability deviation of test data by standardizing the bonding state between the aluminum plate and the reference surface; it achieves mechanized transportation of the aluminum plate by using overhead crane hoisting and power push rods, avoiding the safety risks caused by manual operation and contact with moving parts and heavy objects; it shortens the single test time through automated control push positioning, adapts to the needs of batch production, and improves production efficiency; and it uses a stone reference surface to achieve long-term stability of the test reference, reducing the frequency of debugging. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a flowchart illustrating a method for detecting the high-precision straightness of large-format, wide-width aluminum plates according to an embodiment of this application. Detailed Implementation

[0033] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0036] The method for high-precision straightness testing of large-format, wide-width aluminum plates provided in this application includes:

[0037] S1. Inspect the reference platform and automated conveying system. The reference platform is made of precision-ground stone. The automated conveying system includes a conveying platform and a power push rod.

[0038] S2. Control the overhead crane to lift the aluminum plate to be tested onto the conveying platform;

[0039] S3. Control the power push rod to drive the aluminum plate to move towards the reference platform and make it fully fit the detection surface of the reference platform;

[0040] S4. Along the length of the aluminum plate, inspect the contact seams between the aluminum plate and the reference platform at several inspection positions. If the size of any contact seam does not meet the preset range, the straightness of the aluminum plate is unqualified.

[0041] Specifically: When inspecting the benchmark testing platform, the main focus is on visual inspection. Workers judge whether the benchmark testing platform meets the requirements by observing the appearance of the testing surface.

[0042] When inspecting an automated conveyor system, the appearance of the conveyor platform needs to be checked to ensure it is free from tilting or damage, and that it maintains its normal support and conveying functions. When inspecting the power push rod, ensure it operates normally, that the output end connecting to the aluminum plate is free from dirt, and that the connection is secure.

[0043] The overhead crane is used to lift the aluminum plate. The crane is equipped with a vacuum suction cup to avoid scratching the aluminum plate. The aluminum plate to be tested is smoothly lifted onto the conveyor platform. The position of the aluminum plate on the conveyor platform is adjusted by the overhead crane.

[0044] Manually adjust the position of the aluminum plate to ensure it is not tilted. Use a tape measure to measure the distance between the two ends of the aluminum plate and the reference surface. The deviation should be less than or equal to 10mm to prevent the aluminum plate from being suspended or colliding with the pushing component.

[0045] The aluminum plate is driven to move towards the reference platform by a remote braking force push rod, and the power push rod pushes the aluminum plate to move synchronously, so as to achieve the stability of the aluminum plate movement.

[0046] The measurement positions are planned along the edge length of the aluminum plate. After inspection, if the deviation value of all inspection points is less than 0.3mm, the straightness of the aluminum plate is judged to be qualified; if any inspection point has a deviation greater than 0.3mm, the deviation position and value are marked, and it is judged as unqualified. This method is a sampling inspection method, that is, one inspection point is selected for every meter of aluminum plate. By sampling inspection, the deviation value of the corresponding segment is determined. If an inspection point that does not meet the 0.3mm requirement occurs even once, it indicates that the aluminum plate does not meet the processing requirements.

[0047] This invention effectively reduces the repeatability deviation of test data by standardizing the bonding state between the aluminum plate and the reference surface; it achieves mechanized transportation of the aluminum plate by using overhead crane hoisting and power push rods, avoiding the safety risks caused by manual operation and contact with moving parts and heavy objects; it shortens the single test time through automated control push positioning, adapts to the needs of batch production, and improves production efficiency; and it uses a stone reference surface to achieve long-term stability of the test reference, reducing the frequency of debugging.

[0048] Based on any of the above embodiments, the reference platform is natural granite or artificial marble;

[0049] Alternatively, the flatness of the reference platform is less than or equal to 0.05 mm / m, and the straightness is less than or equal to 0.03 mm / m;

[0050] The base of the reference platform is equipped with multiple adjustable rigid support seats to adjust the levelness of the reference platform.

[0051] Natural granite or artificial marble has a much lower coefficient of thermal expansion than metals, making it less sensitive to temperature and less prone to deformation over time due to low internal stress. This eliminates most measurement errors caused by thermal effects, providing high stability and measurement accuracy in all weather and seasons. It also offers higher data repeatability, ensuring long-term stability of the reference accuracy and significantly reducing the frequency of calibration and adjustment.

[0052] The flatness of the reference platform is less than or equal to 0.05 mm / m, and the straightness is less than or equal to 0.03 mm / m. This establishes the testing standard for reference platforms made of natural granite or artificial marble.

[0053] The support base not only provides a rigid support foundation for the reference platform, but also provides an adjustment basis for the reference platform. It can effectively counteract the insufficient support caused by physical settlement of the ground, and provide a safe, reliable and easily adjustable rigid support for the long-term use of the reference platform.

[0054] Based on any of the above embodiments, the benchmark platform is composed of multiple segments spliced ​​together.

[0055] The reference platform is composed of multiple segments. The assembled reference platform needs to be inspected. During the inspection, a 0.01mm precision feeler gauge is used to check the joints of the reference platform. The joints must be less than or equal to 0.02mm. Otherwise, adjustments need to be made using the support base.

[0056] For long reference platforms, splicing can not only effectively reduce production difficulty but also reduce production costs. However, it should be noted that when the reference platform is spliced ​​from multiple segments, the splice seam should be less than 0.02mm. If the splice seam exceeds this value, it needs to be adjusted through the support base. When inspecting the splice seam, a 0.01mm precision feeler gauge should be used for measurement.

[0057] Strictly controlling the dimensions of the splicing seams can effectively ensure the accuracy of the benchmark platform, thereby ensuring the accuracy of aluminum plate testing.

[0058] Based on any of the above embodiments, the step of checking the benchmark platform in S1 specifically includes:

[0059] S11. Wipe the test surface of the reference platform with a lint-free cloth to ensure it is free of stains and scratches;

[0060] S12. Testing the automated conveyor system includes: testing the synchronization, operating speed, and emergency stop function of the power push rod to ensure the normal operation of the system;

[0061] Specifically, when inspecting the benchmark platform, any stains should be cleaned promptly, and any scratches should be recorded. The size of the scratches should be assessed. Minor scratches that do not affect normal use do not require treatment, while severe scratches require repair or replacement of the benchmark testing platform.

[0062] When inspecting the power actuator, the focus should be on testing its synchronization, evaluating its operating speed, and verifying the functionality of the emergency stop button to ensure the system operates normally.

[0063] The automated conveying system also includes a central control unit and a remote control console. The remote control console is equipped with buttons and indicator lights. The power push rod is electrically connected to the remote control console through the central control unit. The thrust of the power push rod is adjustable. Rollers are installed on the conveying platform.

[0064] The remote control console features buttons for forward, reverse, and emergency stop. Indicator lights indicate normal operation; green indicates normal operation, and red indicates an abnormality. The remote control console serves as a human-machine interface, enabling remote control by the worker. The remote control console, via a central control unit, controls and adjusts multiple power actuators, including adjusting the actuator's thrust, speed, holding time, and forming distance. This achieves fully automated actuator operation, eliminating the need for manual adjustments.

[0065] The rollers on the conveyor platform are made of PA6 polyamide. Wear-resistant and drag-reducing PA6 polyamide rods are laid on the surface of the conveyor platform to reduce frictional resistance when the plate moves, while avoiding scratching the surface of the aluminum plate.

[0066] Alternatively, the roller can be a rubber roller, a nylon roller, a steel roller, etc., which has both sufficient load-bearing capacity and wear resistance.

[0067] Based on any of the above embodiments, step S2 includes: when the overhead crane lifts the aluminum plate onto the conveying platform, the length direction of the aluminum plate is required to be parallel to the reference platform, and the initial distance between the edge of the aluminum plate and the reference platform is controlled within a preset range.

[0068] When the overhead crane lifts aluminum plates onto the conveying platform, the length of the aluminum plate must be parallel to the reference platform, and the initial distance between the edge of the aluminum plate and the reference platform must be controlled between 300 and 500 mm.

[0069] The initial distance between the edge of the aluminum plate and the reference platform is controlled between 300 and 500 mm. This distance range can ensure the safety of the overhead crane during hoisting, meet the requirements of the power push rod to drive the aluminum plate, and also take into account the high efficiency of fully automatic drive.

[0070] Based on any of the above embodiments, a feeler gauge is also included for detecting the contact seam, which detects the contact seam between the aluminum plate and the reference platform at several detection positions.

[0071] Illuminate the contact seam with an LED light strip, insert a feeler gauge from one end of the test position, and record the feeler gauge specifications when there is resistance but no looseness when the feeler gauge is inserted into the test seam.

[0072] The light source provided by the LED light strip illuminates the contact seam between the reference platform and the edge of the aluminum plate from the outside of the aluminum plate. The feeler gauge is slowly inserted into the contact seam from one end of the detection position. When slight resistance is felt and the feeler gauge does not loosen, the feeler gauge specification is recorded. If the feeler gauge cannot be inserted, replace it with a smaller size feeler gauge in turn until the largest size feeler gauge that can be inserted is found.

[0073] When calibrating feeler gauges, use a digital vernier caliper to calibrate them. After measuring the feeler gauge with the digital vernier caliper, the error value of the feeler gauge should be less than or equal to 0.005mm. If the error value exceeds 0.005mm, the feeler gauge needs to be replaced.

[0074] The feeler gauges should be selected according to the standard specifications of 0.1mm, 0.3mm, and 0.5mm, and ensure that the appearance is free of dirt and damage.

[0075] Specifically, the light source provided by the LED light strip fixed on the rapid rotation testing platform illuminates the contact seam between the reference surface of the reference platform and the edge of the aluminum plate from the outside of the aluminum plate. At the same time, a feeler gauge is slowly inserted into the contact seam from one end of the testing position. When slight resistance is felt and the feeler gauge does not loosen, the specification of the feeler gauge is recorded. If the feeler gauge cannot be inserted, smaller feeler gauges are replaced one by one until the largest size feeler gauge that can be inserted is found. For example, if a 0.2mm feeler gauge can be inserted but a 0.25mm feeler gauge cannot be inserted, then the straightness deviation at that point is 0.2mm.

[0076] Based on any of the above embodiments, S4 includes:

[0077] If the gap at the contact seam of the detection position is too large, a 1.0mm feeler gauge can be inserted into the contact seam to check whether the aluminum plate is properly attached, or the aluminum plate can be reversed and reset to re-drive the aluminum plate to contact the reference platform.

[0078] For aluminum plates with excessively large gaps, a 1.0mm feeler gauge can be inserted. It is necessary to rule out the possibility that the aluminum plate is not properly fitted. In this case, the aluminum plate needs to be reversed and driven to contact the reference platform again. If the gap at the test point still does not meet the requirements, the aluminum plate is deemed unqualified.

[0079] Based on any of the above embodiments, S3 includes:

[0080] The control push rod drives the aluminum plate to move towards the reference platform. When the distance to the reference platform is about 20mm, the push rod stops driving. The locking screw is then manually operated to push the wooden block to push the aluminum plate close to the reference platform at a low speed, so that the aluminum plate is stably and tightly attached to the detection surface of the reference platform. After the edge of the aluminum plate is attached to the detection surface of the reference platform, pressure is maintained.

[0081] The aluminum plate moves at a constant speed of 80 mm / s towards the reference platform. When the edge of the aluminum plate is approximately 20 mm from the reference surface of the reference platform, the power push rod stops driving, and manual operation is switched to operation.

[0082] Based on any of the above embodiments, after S4, the method further includes: the power push rod drives the aluminum plate back to the crane hoisting position, and the crane hoists the aluminum plate away from the conveying platform.

[0083] Specifically, the controlled push rod retracts, causing the aluminum plate to return to the crane's hoisting position, which is 300 to 500 mm from the reference surface of the reference platform. The main purpose is to reduce the drive time of the push rod, thereby reducing the overall inspection time and improving inspection efficiency.

[0084] Aluminum sheets are lifted off the conveyor platform by an overhead crane. Qualified sheets are transferred to the next process, while unqualified sheets are marked and isolated for rework. The reference platform and conveyor platform are cleaned in preparation for the next sheet's inspection. The overhead crane enables the classified lifting and transport of materials, reducing manual handling, greatly improving work efficiency, reducing worker fatigue, and ensuring the safety of aluminum sheet lifting, thus minimizing safety hazards for workers.

[0085] If the power push rod jams and the position of the memory aluminum plate deviates, the aluminum plate under test is easily damaged. If the above situation occurs, the emergency stop button should be pressed immediately, the fault should be checked and the operation should be continued.

[0086] Based on any of the above embodiments, S4 includes: a plurality of detection positions that are sequentially set along the direction of the reference platform at intervals of one meter.

[0087] One detection point is set every 1 meter, and an additional point is added at the end where the length is less than 1 meter. The detection point positions are marked on the edge of the aluminum plate with a marker pen. The marking is done manually with a ruler. The detection points are planned manually, which is quick and can actively adapt to aluminum plates of different lengths. When measuring the gap, the worker holds a standard feeler gauge to measure, which is efficient and accurate.

[0088] Equipment maintenance cycle requirements: The straightness of the reference platform should be calibrated monthly using a laser interferometer, the synchronization of the power push rod should be checked quarterly, and the PA6 polyamide rollers on the conveyor platform should be replaced annually.

[0089] By calibrating the straightness of the benchmark platform monthly, the failure of the benchmark platform due to ground subsidence can be avoided. At the same time, the monthly cycle can balance cost and ensure the effectiveness of the test. In addition, the use of laser interferometer calibration is fast and efficient.

[0090] The power push rod is synchronously tested and calibrated every quarter, with the optimal cycle determined based on actual production conditions to balance accuracy and practicality.

[0091] The rollers are replaced annually to ensure the stability of the conveyor platform.

[0092] Alternatively, replacing the rollers with steel ones can extend their service life; therefore, the replacement of rollers should be determined based on their material.

[0093] Testing environment requirements: The ambient temperature should be controlled between 15 and 25 degrees Celsius, and the humidity should be less than or equal to 65%. Avoid direct sunlight on the reference platform to prevent sudden temperature changes from affecting accuracy.

[0094] The coefficient of thermal expansion of marble is only 1 / 24 that of metal. A temperature change of 10 degrees Celsius will only produce an accuracy deviation of 0.005 mm / m. Therefore, the impact of temperature changes within 10 degrees Celsius on the test results is relatively small. If the temperature difference increases, the accuracy deviation will further increase, thus affecting the test accuracy.

[0095] High humidity can also affect the accuracy of stone testing, so it should be kept below 65%. Humidity within this range has little impact on testing accuracy and can be ignored.

[0096] Direct sunlight can cause significant temperature differences between different surfaces of the stone, leading to bending and affecting testing accuracy. Therefore, direct sunlight on the reference platform should be avoided.

[0097] Data processing and archiving requirements: Record the straightness deviation values ​​of all test points, label the aluminum plate number, test time, and operator information, upload the test records to the production management system, and keep them for no less than 3 years for easy traceability.

[0098] Compile the "Aluminum Plate Straightness Inspection Record Sheet", record the straightness deviation values ​​of all inspection points, and label the aluminum plate number, inspection time, and operator information, and compile the statistics in the "Aluminum Plate Straightness Inspection Record Sheet".

[0099] Upload the test records to the cloud drive or production management system to avoid data loss and facilitate later traceability.

[0100] The detection method provided by this invention has the following advantages:

[0101] 1. Using natural granite or artificial marble as the reference platform, the repeatability deviation of the test data is less than or equal to 0.03mm, and the annual accuracy fluctuation of the reference is less than or equal to 0.05mm / m, which is far superior to the traditional method: repeatability deviation ±0.08mm, reference circumferential fluctuation 0.12mm / m, which fully meets the straightness test requirements of aluminum plates less than or equal to 0.3mm.

[0102] 2. This invention replaces manual material pushing with automated positioning, reducing positioning time from 5 minutes to 1 minute. Standardized measurement simplifies data recording, reducing measurement time from 20 minutes to 5 minutes, and the total time for a single inspection is less than or equal to 10 minutes. Furthermore, the frequency of baseline debugging is reduced from once a week to once a month, reducing the debugging time of professional personnel by 80%. Improved repeatability of inspection data reduces the false judgment rate from 5% to below 1%, improving inspection efficiency by more than 60%, reducing labor costs by 50%, and reducing rework and scrap losses by 80%. The overall cost of use is significantly lower than existing methods, making it suitable for mass production needs.

[0103] 3. This invention achieves human-machine separation through a remote operating console, eliminating the need for operators to approach the moving aluminum plate and power push rod, thus avoiding the risk of collision and squeezing. At the same time, it clarifies the planning of testing points and the usage specifications of feeler gauges. New employees can operate independently after one week of training, without relying on technicians with more than 5 years of experience. This completely eliminates the safety risks of manual operation, lowers the operating threshold, and solves the testing bottleneck problem caused by the shortage of highly skilled personnel in the industry.

[0104] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0105] The method for high-precision straightness testing of large-format, wide-width aluminum plates provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A method for high-precision straightness detection based on large-format wide aluminum plates, characterized in that, include: The inspection includes a reference platform and an automated conveying system, wherein the reference platform is made of precision-ground stone; and the automated conveying system includes a conveying platform and a power push rod. The overhead crane is controlled to lift the aluminum plate to be tested onto the conveying platform; The power push rod is controlled to drive the aluminum plate to move toward the reference platform and completely fit the detection surface of the reference platform; Along the length of the aluminum plate, the contact seams between the aluminum plate and the reference platform at several detection positions are detected. If the size of any contact seam does not meet the preset range, the straightness of the aluminum plate is unqualified.

2. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 1, characterized in that, The reference platform is made of natural granite or artificial marble. Alternatively, the flatness of the reference platform is less than or equal to 0.05 mm / m, and the straightness is less than or equal to 0.03 mm / m; The base of the reference platform is equipped with multiple adjustable rigid support seats for adjusting the levelness of the reference platform.

3. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 2, characterized in that, The benchmark platform is composed of multiple segments.

4. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 1, characterized in that, The inspection of the benchmark platform includes: Wipe the test surface of the reference platform with a lint-free cloth to ensure it is free of stains and scratches; Testing the automated conveying system includes: testing the synchronization, operating speed, and emergency stop function of the power push rod to ensure the system operates normally.

5. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 4, characterized in that, Controlling the overhead crane to lift the aluminum plate to be tested onto the conveying platform includes: The length direction of the aluminum plate is controlled to be parallel to the reference platform, and the initial distance between the edge of the aluminum plate and the reference platform is controlled within a preset range.

6. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 4, characterized in that, It also includes feeler gauges for detecting contact seams; The contact seams between the aluminum plate and the reference platform at several of the aforementioned detection locations are detected; Illuminate the contact seam with a light source, insert the feeler gauge from one end of the detection position, and record the feeler gauge specification when there is resistance and no looseness when the feeler gauge is inserted into the detection seam.

7. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 6, characterized in that, The contact seams between the aluminum plate and the reference platform at several detection locations are detected, including: If the gap in the contact seam at the detection location is too large, the 1.0mm feeler gauge can be inserted into the contact seam to check whether the aluminum plate is properly fitted, or the aluminum plate can be reverse-driven to reset and re-drive the aluminum plate to contact the reference platform.

8. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 1, characterized in that, Controlling the power push rod to drive the aluminum plate to move toward the reference platform and fully contact the detection surface of the reference platform includes: The power push rod is controlled to drive the aluminum plate to move towards the reference platform. When the distance to the reference platform is about 20mm, the power push rod stops driving, and the locking screw is manually operated to push the wooden block to push the aluminum plate close to the reference platform at a low speed, so that the aluminum plate is stably and tightly attached to the detection surface of the reference platform. After the edge of the aluminum plate is attached to the detection surface of the reference platform, pressure is maintained.

9. The method for high-precision straightness detection based on large-format wide aluminum plates according to claim 8, characterized in that, After inspecting the contact seams between the aluminum plate and the reference platform at several inspection locations, the method further includes: After the locking screw is released, the power push rod drives the aluminum plate back to the crane hoisting position, and the crane lifts the aluminum plate off the conveying platform.

10. The method for high-precision straightness detection based on large-format wide aluminum plates according to any one of claims 1-9, characterized in that, The detection of the contact seam between the aluminum plate and the reference platform at several detection locations includes: The detection positions are sequentially set along the direction of the reference platform at intervals of one meter.

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