A cold-bending glass performance verification experiment method and experiment tooling

Abstract

The application provides a cold-bending glass performance verification experiment method and experiment tool, and aims to solve the technical problems of poor adaptability, great safety hazards, incomplete data collection and imperfect verification system in the existing cold-bending glass experiment. The experiment method comprises the following steps: selecting a test piece, a general step, fixing a detection unit frame corresponding to the glass test piece on the experiment tool, placing the glass test piece and setting rubber pads, adjusting the plane of the glass test piece to be horizontal by using a level, performing a first all-around three-dimensional scanning on the glass test piece and recording the data of the original state of the glass; measuring point arrangement, gradually pressurizing through an electric loading device and the experiment tool, correcting the finite element analysis result, and the experiment tool comprises two supporting cross beams and two supporting vertical beams, which can verify the stress state, deformation characteristics, long-term use performance and durability of the cold-bending glass, and provide a scientific basis for the design, production and on-site installation of the cold-bending glass curtain wall.

Description

Technical Field

[0001] This invention relates to the field of glass production testing technology, specifically to a performance verification test method and test fixture for cold-bent glass, applicable to the comprehensive performance testing of cold-bent glass used in curved building curtain walls. Background Technology

[0002] As modern architectural design evolves towards complex curved surfaces, cold-bent glass has become a core material for curved curtain walls due to its advantages of low construction cost and strong adaptability to different shapes. Cold-bent glass utilizes the elastic and bendable properties of flat glass, forming it through on-site clamping points. However, there is currently no unified industry standard in China, and curtain wall design units, contractors, and glass manufacturers can only accumulate experience through finite element analysis and simple physical model tests. Existing cold-bent glass testing technology has many shortcomings: it lacks a unified experimental procedure for different types of glass and different cold-bending methods; the experimental items are incomplete, failing to fully verify key indicators such as the stress state during the cold-bending process, the long-term performance of laminated glass, and the durability of insulated glass; traditional tooling structures are simple, making it difficult to achieve multi-point synchronous control, resulting in poor adaptability, and there is a lack of dedicated tooling equipment. Insufficient safety protection: Pressure changes in the glass are difficult to control during manual loading, especially in destructive experiments, where glass breakage and shards can easily cause accidents; adequate protective measures are lacking. Incomplete data collection: A multi-dimensional data collection system is not in place; monitoring of key indicators such as the PVB layer condition of laminated glass, argon content in insulated glass, and adhesive layer deformation is missing, resulting in insufficient data reliability. Inadequate verification system: Relying solely on a single finite element software analysis, a mechanism for comparing and correcting experimental and theoretical data is lacking, and the accuracy of the finite element model is not adequately supported. To address these issues, there is an urgent need to develop a standardized experimental method for verifying the performance of cold-bent glass and highly adaptable and precise experimental fixtures to overcome the shortcomings of existing technologies. Technical solution

[0003] The purpose of this invention is to provide a test method and experimental fixture for verifying the performance of cold-bent glass, aiming to solve the technical problems existing in current cold-bent glass experiments, such as non-standard experimental methods, poor adaptability of experimental fixtures, significant safety hazards, incomplete data collection, and an imperfect verification system. The technical solution adopted in this invention is: a test method for verifying the performance of cold-bent glass, comprising the following steps: Step 1: Select specimens, including cold bending types of single-corner cold bending, free cold bending, and columnar cold bending. Select three thickness specifications for each type, and each specification corresponds to three types of glass specimens: single-pane glass, laminated glass, and insulated glass. Step 2, General Steps: Fix the detection unit frame corresponding to the glass specimen on the experimental fixture, place the glass specimen and set the rubber pad, use a spirit level to adjust the plane of the glass specimen to be horizontal, and use a 3D laser scanner to perform the first all-round 3D scan of the glass specimen and record the data of the glass's most original state. Step 3: Measurement point arrangement. Based on the finite element analysis results of the glass specimen tested by the stress distribution testing equipment, strain rosettes are attached to the glass stress complex parts, strain gauges are attached to the stress direction of the glass, and strain gauges are attached to both sides of the laminated glass. Displacement gauges are installed at the maximum displacement of cold bending at the corresponding position of the loading point of the glass specimen. Step 4: Install safety protection devices, and cover the glass panel with scaffolding safety nets; Step 5: Apply pressure step by step using an electric loading device and experimental fixtures. After reaching the target position, return the device to a flat plate state and determine the deformation pattern. Apply pressure step by step again and record the strain data and displacement under each load level. The cold bending value is 5 mm for each load level, and the device should be left to stand for 15 minutes after each load level is completed. Step 5: After cold bending to the theoretical position, apply structural adhesive. After curing, record the stress and perform a second three-dimensional scan; perform finite element verification, compare the experimental data with the theoretical data, and correct the finite element analysis results. Specialized procedures: Single-piece tempered and semi-tempered glass: After completing the general procedures, the single-corner cold bending specimen is further pressurized until failure, and the limit parameters are recorded. The cold bending value for each stage of the destructive stage is 10mm; no destructive tests are performed for free cold bending and columnar cold bending. Semi-tempered laminated glass: After completing the general steps, it is left to stand in a cold-bent state for 1 month. Stress and deformation are tested at intervals of 1 hour, 1 day and 1 month. The color and bubbles of the PVB layer are observed at the same time. Finally, a destructive test is carried out. Durability test of insulated laminated glass: The long side of the specimen is placed in a water bath and tested for 6 cycles, for a total of 60 days; the water vapor in the cavity is observed in each cycle, and the dew point is tested before and after the experiment and every 10 days; the argon content is measured every 10 days, for a total of 7 times; the deformation of the insulated layer before and after cold bending is tested.

[0004] This invention also provides a cold-bent glass performance verification experimental fixture. This fixture, used in conjunction with the above-mentioned experimental method, enables precise loading and safety testing of various cold-bending forms. It includes: a fixture base, which consists of columns respectively positioned at the four corners; a detection unit support frame positioned on the top of the fixture base; the detection unit support frame includes two opposing support beams: a first support beam and a second support beam; and two support vertical beams: a first support vertical beam and a second support vertical beam. Both the support beams and the support vertical beams are square tubular profile support beams, and the overall shape of the support beams is adapted to the curved or inclined edge surface of the cold-bent glass sheet.

[0005] Preferably, the first supporting horizontal beam and the first supporting vertical beam are horizontally fixed. The adjusting end of the second supporting horizontal beam and the second supporting vertical beam intersects through an adjusting device connected to a column, which is an adjusting column. The adjusting device includes an upper limit block for the horizontal beam and an upper limit block for the vertical beam, both fixed at the same height on the adjusting column, as well as a lower support block for the horizontal beam and a lower support block for the vertical beam, both at the same height. The upper limit blocks for the horizontal beam and the upper limit blocks for the vertical beam are provided with limit adjusting bolts, and the lower support blocks for the horizontal beam and the lower support blocks for the vertical beam are provided with support adjusting bolts. The two sets of limit adjusting bolts and support adjusting bolts are respectively abutted against the adjusting ends of the second supporting horizontal beam and the second supporting vertical beam. The upper limit blocks for the vertical beam and the lower support blocks for the vertical beam are provided with connecting rods. The far ends of the second supporting horizontal beam and the second supporting vertical beam are respectively hinged to the first supporting horizontal beam and the first supporting vertical beam. The first supporting horizontal beam and the first supporting vertical beam are horizontally fixed. The tooling base is provided with a square lower frame.

[0006] Preferably, the support beams and support vertical beams of the detection unit bracket frame are a first group of adjacent support beams and support vertical beams that are horizontally fixed, and a second group of adjacent support beams and support vertical beams that are adapted to the curved shape of the edge of the cold-bent glass plate.

[0007] Preferably, the two opposing vertical support beams of the detection unit bracket frame are configured to adapt to the curved shape of the edge of the cold-bent glass plate, and the two opposing horizontal support beams are fixed horizontally.

[0008] Preferably, the supporting vertical beam and supporting horizontal beam of the detection unit bracket frame are both designed to adapt to the curved surface shape of the edge of the cold-bent glass plate.

[0009] The advantages and beneficial effects of this invention are as follows: Standardized experimental methods: The system clearly defines the experimental procedures and index requirements for different types of glass and different cold bending forms, comprehensively verifying the stress state, deformation characteristics, long-term performance, and durability of cold-bent glass, filling the gap in the industry for unified experimental methods; Versatile experimental fixtures: Integrating loading modules for three cold bending forms, electric loading achieves multi-point synchronous control, resulting in high loading accuracy. Compared with traditional manual fixtures, testing efficiency is improved by more than 30%, and data fluctuation is reduced to within ±1%; Excellent safety performance: Equipped with comprehensive safety protection devices, electric loading reduces direct personnel involvement, significantly reducing the safety risks caused by glass breakage and splashing; Comprehensive data acquisition: Multi-dimensional monitoring of key indicators such as stress, displacement, deformation, PVB layer status, and argon content, combined with 3D scanning and timed observation, provides sufficient basis for finite element model correction; combined with experimental data correction, the reliability of the finite element model can be improved. Therefore, it can systematically verify the stress state, deformation characteristics, long-term performance, and durability of cold-bent glass, providing a scientific basis for the design, production, and on-site installation of cold-bent glass curtain walls. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the single-corner point cold bending experimental fixture, which is an embodiment of the experimental fixture of the present invention. Figure 2 This is a schematic diagram of the structure of a free-form surface cold bending experimental fixture, which is a second embodiment of the experimental fixture of the present invention. Figure 3 This is a schematic diagram of the structure of a single-curve cold bending experimental fixture, which is an embodiment of the experimental fixture of the present invention. Figure 4 This is a schematic diagram of the single-corner point cold bending working state of the experimental tooling of the present invention. Figure 5 This is a schematic diagram of the free cold bending working state of the experimental tooling of the present invention; Figure 6 This is a schematic diagram of the single-curve cold bending working state of the experimental tooling of the present invention; Figure 7 This is a schematic diagram showing the bonding position and stress distribution of the single-corner cold bending strain rosemary of the present invention; Figure 8 This is a schematic diagram showing the bonding position and stress distribution of the free-form surface cold bending strain rosemary according to the present invention; Figure 9 This is a schematic diagram showing the bonding position and stress distribution of the single-curved surface cold bending strain rosemary of the present invention; Figure 10 This is a schematic diagram comparing the initial state three-dimensional scanning results and three-dimensional drawings of a free-form cold-bent glass according to the present invention; Figure 11 for Figure 10 A schematic diagram comparing the cold bending amount of the initial state 3D scanning result and the 3D scanning result under loading state of the free-form cold-bent glass; Figure 12 for Figure 10 A schematic diagram comparing the displacement scan values ​​and finite element values ​​of free-form cold-bent glass. Figure 13 This is a schematic diagram of the regulator structure of the experimental tooling of the present invention.

[0011] The numbers in the diagram are explained as follows: 1. Tooling base; 2. Detection unit bracket frame; 21. First support beam; 22. First support vertical beam; 23. Second support beam; 24. Second support vertical beam; 3. Adjuster; 31. Upper limit block of beam; 32. Upper limit block of vertical beam; 33. Lower support block of beam; 34. Lower support block of vertical beam; 4. Adjusting column; 5. Limit adjustment bolt; 6. Support adjustment bolt; 7. Connecting rod; 8. Cold-bent glass. Detailed Implementation

[0012] according to Figures 1 to 12The technical solution of the present invention is described in detail. The present invention provides an experimental method for verifying the performance of cold-bent glass, which clarifies the experimental process, index requirements and data processing methods for single-pane tempered / semi-tempered glass, semi-tempered laminated glass and insulated laminated glass under single-corner point cold bending, free cold bending and columnar cold bending forms; the experimental method adopts special experimental fixtures. Example 1: A test method for verifying the performance of cold-bent glass, comprising the following steps: Step 1: Select specimens, including cold bending types of single-corner cold bending, free cold bending, and columnar cold bending. For each type, select specimens with three thicknesses of 8mm, 10mm, and 12mm. Each specification corresponds to three types of glass specimens: single-pane glass, laminated glass, and insulated glass. Step 2, General Steps, Tooling Deployment: Install experimental tooling adapted to different glass specifications, a 16-channel stress-strain testing system, a displacement tester, an argon content tester, a dew point meter, and a 3D scanner; Site Requirements: Experimental site area of ​​120㎡, room temperature environment, no vibration, equipped with 220V power supply and UPS uninterruptible power supply, and full video monitoring.

[0013] The detection unit frame corresponding to the glass specimen will be fixed on the experimental fixture, the glass specimen will be placed and rubber pads will be set, the plane of the glass specimen will be adjusted to be horizontal using a level, and the glass specimen will be scanned in three dimensions for the first time using a three-dimensional laser scanner and the data of the glass in its original state will be recorded. Step 3: Measurement point arrangement. Based on the finite element analysis results of the glass specimen tested by the stress distribution testing equipment, strain rosettes are attached to the glass stress complex parts, strain gauges are attached to the stress direction of the glass, and strain gauges are attached to both sides of the laminated glass. Displacement gauges are installed at the maximum displacement of cold bending at the corresponding position of the loading point of the glass specimen. Step 4: Install safety protection devices, and cover the glass panel with scaffolding safety nets; Step 5: Apply pressure step by step using an electric loading device and experimental fixtures. After reaching the target position, return the device to a flat plate state and determine the deformation pattern. Apply pressure step by step again and record the strain data and displacement under each load level. The cold bending value is 5 mm for each load level, and the device should be left to stand for 15 minutes after each load level is completed. Step 5: After cold bending to the theoretical position, apply structural adhesive. After curing, record the stress and perform a second three-dimensional scan; perform finite element verification, compare the experimental data with the theoretical data, and correct the finite element analysis results. Specialized procedures: Single-piece tempered and semi-tempered glass: After completing the general procedures, the single-corner cold bending specimen is further pressurized until failure, and the limit parameters are recorded. The cold bending value for each stage of the destructive stage is 10mm; no destructive tests are performed for free cold bending and columnar cold bending. Semi-tempered laminated glass: After completing the general procedures, it is left to stand in a cold-bent state for one month. Stress and deformation are tested at 1-hour, 1-day, and 1-month intervals, while the color and bubbles of the PVB layer are observed simultaneously. Finally, a destructive test is conducted. The changes over time are shown in the table below: Durability test of insulated laminated glass: The long side of the HS10+2.28PVB+HS10 insulated glass specimen was placed in a water bath for 6 cycles (60 days in total). It was taken out for observation every 10 days. There was no water vapor or water droplets in the cavity. The dew point was tested before and after the experiment and every 10 days. The requirements were met. The argon content was measured every 10 days for a total of 7 times. The content remained stable. The deformation of the insulated layer was measured by a 3D scanner before and after the experiment. The deformation was within the allowable range.

[0014] like Figures 1 to 3 As shown, the structure of the cold-bent glass performance verification experimental fixture includes: a fixture base 1, which is assembled from columns set at the four corners and a square lower frame. Depending on the length of the fixture base, columns can be added in the middle. A detection unit support frame 2 is set on the top of the fixture base. The detection unit support frame includes two supporting beams arranged opposite each other: a first supporting beam 21 and a second supporting beam 23; and two supporting vertical beams: a first supporting vertical beam 22 and a second supporting vertical beam 24. The supporting beams and supporting vertical beams are all square tube profile support beams, and the overall shape of the support beams is adapted to the curved or inclined surface of the edge of the cold-bent glass plate.

[0015] like Figure 1 and Figure 4 As shown, the experimental fixture for single-corner cold bending uses a test unit support frame with the first support beam 21 and the first support vertical beam 22 fixed horizontally. The adjustment end where the second support beam 23 intersects with the second support vertical beam 24 is connected to the adjustment column 4 via the adjuster 3. Figure 13As shown, the regulator 3 includes a horizontal beam upper limit block 31 and a vertical beam upper limit block 32, both fixed at the same height on the adjusting column 4, and a horizontal beam lower support block 33 and a vertical beam lower support block 34, both at the same height. The horizontal beam upper limit block 31 and the vertical beam upper limit block 32 are equipped with limit adjusting bolts 5, and the horizontal beam lower support block 33 and the vertical beam lower support block 34 are equipped with support adjusting bolts 6. The two sets of limit adjusting bolts 5 and support adjusting bolts 6 respectively abut against the adjusting ends of the second supporting horizontal beam 23 and the second supporting vertical beam 24. The vertical beam upper limit block and the vertical beam lower support block are equipped with connecting rods 7. The distal ends of the second supporting horizontal beam 23 and the second supporting vertical beam 24 are respectively hinged to the first supporting horizontal beam 21 and the first supporting vertical beam 22. The adjusting end of the second supporting vertical beam 24 extends out of the detection unit bracket frame 2, and the first supporting horizontal beam 21 and the first supporting vertical beam 22 of the detection unit bracket frame are horizontally fixed. The second support vertical beam 23 and the second support horizontal beam 24 can be adjusted by pressing down or releasing the adjusting limit bolts 5 of the adjuster at the ends of the second support horizontal beam and the second support vertical beam, adjusting the tilt to the corresponding point of single-point cold bending to the fully positioned position. The adjusting bolts provide upward support, allowing for convenient, flexible, and precise height adjustment. The connecting rod prevents the first support vertical beam from falling during adjustment. The tooling base has a square lower frame to fix the column.

[0016] Work status as Figure 4 As shown, the cold-bent glass 8 is placed along the direction of the arrow. The first supporting vertical beam 22 has a straight edge, with a glass pressure plate on the constrained edge; the first supporting horizontal beam 21 has a straight edge, with no glass pressure plate on the unconstrained edge; the second supporting vertical beam 24 has a straight edge, with a glass pressure plate on the cold-bent edge; the second supporting horizontal beam 23 has a straight edge, with no glass pressure plate on the unconstrained edge. The cold bending amount z = 40mm. Figure 7 The location and stress distribution of the cold bending strain rose at a single corner point are shown in Table 1. The measuring points are numbered 1 to 4, and the stress values ​​are shown in Table 1. Measurement point number 1 2 3 4 Calculate stress value 4.58MPa 4.21MPa 4.22MPa 3.38MPa like Figure 2 and Figure 5 As shown, the experimental fixture for cold bending of free-form surfaces uses a testing unit support frame with two opposing vertical support beams designed to accommodate the curved shape of the cold-bent glass plate edge, and two opposing horizontal support beams fixed horizontally. The working state is as follows... Figure 5 As shown, the cold-bent glass 8 is placed in the direction of the arrow. The two supporting crossbeams have straight edges, and the unconstrained edges have no glass pressure plates; the two supporting vertical beams have curved edges, and the cold-bent edges have glass pressure plates; as shown... Figure 8 The stress distribution and bonding locations of the free cold bending strain gauges are shown in Table 2, with measuring points numbered 1 to 4. Measurement point number 1 2 3 4 Calculate stress value 14.4MPa 7.45MPa 6.58MPa 5.5MPa like Figure 3 and Figure 6As shown, the experimental fixture for cold bending of single-curved surfaces uses a testing unit support frame whose supporting vertical beams and horizontal beams are designed to adapt to the curved shape of the edge surface of the cold-bent glass plate. The working state is as follows... Figure 6 As shown, the cold-bent glass 8 is placed in the direction of the arrow, with curved edges opposite the two supporting crossbeams, and no glass pressure plates on the unconstrained edges; the edges opposite the two supporting vertical beams are curved and twisted, with glass pressure plates on the cold-bent edges. Figure 9 The stress distribution and bonding location of the single-curve cold bending strain gauge are shown in Table 3, with measuring points numbered 1 to 4. Measurement point number 1 2 3 4 Calculate stress value 3.39MPa 3.35MPa 2.55MPa 2.67MPa like Figures 10 to 12 As shown, a three-dimensional scanning process of the initial and loaded states of a free-form cold-bent glass was performed, employing theoretical simulation-based stress distribution correction measures: mutual verification was performed using two common finite element software programs, ANSYS and RFEM, and cross-verification was conducted using ANSYS and RFEM software. Experimental data was compared with theoretical data to correct model parameters. After correction, the relative error between the calculated stress value and the experimental data was less than 5%, meeting engineering design requirements. The comparison between theoretical calculations and experiments was strengthened, and the location of test points was recorded. The stress values ​​at corresponding points were obtained in the theoretical calculation model for comparative analysis. Both the embodiments of this invention and the laboratory finite element calculation results were corrected based on actual measurement results. When necessary, existing calculation theory formulas were modified according to measured results, and the laboratory issued relevant corrected results. The test comparison results are shown in Table 4. 3683-10mm measuring point number 3D scan displacement (mm) Finite element displacement (mm) 1 -34.0 -33.0 2 -15.5 -15.8 3 -5.7 -5.3 4 -1.5 -1.2 5 0.0 -2.0 6 0.0 1.8 7 16.6 16.0 8 20.1 19.7 9 13.6 13.6 10 0.0 1.6 1. First, the shape of the glass in its natural state was compared with the shape designed in the drawing, indicating that the experimental glass meets the experimental requirements.

[0017] 2. Adjust the shim thickness according to the designed cold bending amount, and use three-dimensional scanning to make the experimental fixture achieve the cold bending amount required by the actual engineering.

[0018] 3. The displacement during the cold bending loading process was extracted and imported into the finite element analysis, ensuring the rationality of the finite element analysis.

[0019] In summary, the objective of this invention has been achieved.

Claims

1. A test method for verifying the performance of cold-bent glass, characterized in that: Including the following steps: Step 1: Select specimens, including cold bending types of single-corner cold bending, free cold bending, and columnar cold bending. Select three thickness specifications for each type, and each specification corresponds to three types of glass specimens: single-pane glass, laminated glass, and insulated glass. Step 2, General Steps: Fix the detection unit frame corresponding to the glass specimen on the experimental fixture, place the glass specimen and set the rubber pad, use a spirit level to adjust the plane of the glass specimen to be horizontal, and use a 3D laser scanner to perform the first all-round 3D scan of the glass specimen and record the data of the glass's most original state. Step 3: Measurement point arrangement. Based on the finite element analysis results of the glass specimen tested by the stress distribution testing equipment, strain rosettes are attached to the glass stress complex parts, strain gauges are attached to the stress direction of the glass, and strain gauges are attached to both sides of the laminated glass. Displacement gauges are installed at the maximum displacement of cold bending at the corresponding position of the loading point of the glass specimen. Step 4: Install safety protection devices, and cover the glass panel with scaffolding safety nets; Step 5: Apply pressure step by step using an electric loading device and experimental fixtures. After reaching the target position, return the device to a flat plate state and determine the deformation pattern. Apply pressure step by step again and record the strain data and displacement under each load level. The cold bending value is 5 mm for each load level, and the device should be left to stand for 15 minutes after each load level is completed. Step 5: After cold bending to the theoretical position, apply structural adhesive, record the stress after curing, and perform a second 3D scan; Finite element verification involves comparing the finite element analysis results with theoretical data, and then comparing experimental data with theoretical data to correct the finite element analysis results. Specialized procedures: Single-piece tempered and semi-tempered glass: After completing the general procedures, the single-corner cold bending specimen is further pressurized until failure, and the limit parameters are recorded. The cold bending value for each stage of the destructive stage is 10mm; no destructive tests are performed for free cold bending and columnar cold bending. Semi-tempered laminated glass: After completing the general steps, it is left to stand in a cold-bent state for 1 month. Stress and deformation are tested at intervals of 1 hour, 1 day and 1 month. The color and bubbles of the PVB layer are observed at the same time. Finally, a destructive test is carried out. Durability test of insulated laminated glass: The long side of the specimen is placed in a water bath and tested for 6 cycles, for a total of 60 days; the water vapor in the cavity is observed in each cycle, and the dew point is tested before and after the experiment and every 10 days; the argon content is measured every 10 days, for a total of 7 times; the deformation of the insulated layer before and after cold bending is tested.

2. A testing fixture for verifying the performance of cold-bent glass, comprising: The tooling base is characterized in that: the tooling base is assembled from columns and a square lower frame respectively set at the four top corners, and a detection unit support frame is set on the top of the tooling base. The detection unit support frame includes two supporting horizontal beams arranged opposite to each other: a first supporting horizontal beam and a second supporting horizontal beam; and two supporting vertical beams: a first supporting vertical beam and a second supporting vertical beam; both the supporting horizontal beams and the supporting vertical beams are square tube profile supporting beams, and the overall shape of the supporting beams is adapted to the curved or inclined surface of the edge of the cold-bent glass plate.

3. The experimental fixture for verifying the performance of cold-bent glass according to claim 2, characterized in that: The first supporting horizontal beam and the first supporting vertical beam are horizontally fixed. The adjusting end of the second supporting horizontal beam and the second supporting vertical beam intersects through an adjusting device connected to a column, which is an adjusting column. The adjusting device includes an upper limit block for the horizontal beam and an upper limit block for the vertical beam, both fixed at the same height on the adjusting column, as well as a lower support block for the horizontal beam and a lower support block for the vertical beam, both at the same height. The upper limit blocks for the horizontal beam and the upper limit blocks for the vertical beam are equipped with limit adjusting bolts, and the lower support blocks for the horizontal beam and the lower support blocks for the vertical beam are equipped with support adjusting bolts. The two sets of limit adjusting bolts and support adjusting bolts are respectively abutted against the adjusting ends of the second supporting horizontal beam and the second supporting vertical beam. The upper limit blocks for the vertical beam and the lower support blocks for the vertical beam are equipped with connecting rods. The far ends of the second supporting horizontal beam and the second supporting vertical beam are respectively hinged to the first supporting horizontal beam and the first supporting vertical beam. The first supporting horizontal beam and the first supporting vertical beam are horizontally fixed. The tooling base is equipped with a square lower frame.

4. The experimental fixture for verifying the performance of cold-bent glass according to claim 2, characterized in that: The two opposing vertical support beams of the detection unit bracket frame are designed to adapt to the curved shape of the edge of the cold-bent glass plate, while the two opposing horizontal support beams are fixed horizontally.

5. The experimental fixture for verifying the performance of cold-bent glass according to claim 2, characterized in that: The vertical and horizontal support beams of the detection unit bracket frame are designed to adapt to the curved shape of the edge of the cold-bent glass plate.

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