Steel structure warping degree detection device and detection method thereof

Abstract

The present application relates to steel structure warping degree detection technical field, and disclose a kind of steel structure warping degree detection device and its detection method, including protective shell assembly, lifting clamping assembly and optical detection assembly;Protective shell assembly includes shell base, and shell base is equipped with placement cavity in;Lifting clamping assembly includes two groups of connecting lug a symmetrically fixedly connected to the surface of placement cavity, the inner cavity of each group of connecting lug a is rotatably connected with rotating shaft, and the both ends of rotating shaft are fixedly connected with driven part, the lifting action of placement cavity is linked with lifting clamping assembly, the control of arc-shaped profiled steel plate clamping and release is realized, during the lifting process of placement cavity, clamp is automatically switched to clamping state by lifting clamping assembly, reaches the highest place or initial lowest position, and automatically switches to release state by lifting clamping assembly, without needing to control clamping and release by two independent switch operations as in prior art, and the detection operation steps are simplified.

Description

Technical Field

[0001] This invention relates to the field of steel structure warpage detection technology, specifically to a steel structure warpage detection device and its detection method. Background Technology

[0002] Curved profiled steel sheets, as representative components of cold-formed thin-walled steel structures, use 0.8–3 mm thick carbon structural steel sheets or color-coated steel sheets as base materials. After continuous roll forming or bending using cold-forming equipment, they form a single-curved arc-shaped main body extending along the length. The cross-section is mostly corrugated, trapezoidal, or interlocking. Both sides have integrally formed straight folded edges. This structure not only meets the installation and splicing requirements of building envelope systems but also provides a stress reference surface for clamping operations during inspection. Due to its advantages of being lightweight, high-strength, and having high forming efficiency, it is widely used in roof cladding systems for industrial plants, warehousing facilities, and large stadiums. Warpage is a key indicator for evaluating the processing quality and installation suitability of curved profiled steel sheets. Uneven internal stress in the sheet during cold bending, fluctuations in equipment roller pressing parameters, or initial unevenness of raw materials can all lead to defects such as peak or trough flatness deviation, arc axis offset, or edge warping in the components. These defects not only cause excessive gaps in the splicing of the panels during on-site installation, affecting the waterproof sealing of the roof, but also cause local stress concentration when under load, reducing the load-bearing stability of the components. Therefore, curved profiled steel sheets must undergo warpage testing before leaving the factory, and the testing process must achieve coordinated operation of "fixation, deformation, and measurement" through a clamping structure. Currently, the mainstream approach in the industry is to use a contact-type warpage detection solution. Its core principle is as follows: the two ends of the curved profiled steel sheet are rigidly fixed by a clamping structure. External force is applied by the power component of the clamping structure, causing the component to deform along the radial direction of the arc by a preset amplitude. This deformation can fully reveal hidden warpage defects and provide a stable reference posture for subsequent measurements. After the deformation state stabilizes, warpage data is obtained by means of methods such as collecting the offset of surface points by displacement sensors, scanning the arc contour deviation by laser detectors, or manually comparing with standard templates. However, the above operation method requires two separate switch operations to complete the clamping and releasing actions, which is cumbersome. Especially in batch testing scenarios, frequent switch pressing will significantly reduce testing efficiency and increase the labor intensity of testing personnel. At the same time, the independence of the two switch operations is prone to human error. For example, if the release switch is accidentally pressed when the clamping is not in place, it will not only affect the testing accuracy, but may also cause the component to slip and be damaged or pose a safety hazard to personnel. In view of this, the present invention solves the above-mentioned technical problems by proposing a steel structure warpage detection device and detection method. Summary of the Invention

[0003] To address the shortcomings of the aforementioned background technology, this invention provides a technical solution for a steel structure warpage detection device and its detection method. By linking the lifting and lowering action of the placement cavity with the lifting and clamping assembly, the clamping and releasing of the arc-shaped profiled steel sheet is controlled. During the lifting and lowering process of the placement cavity, the clamping plate automatically switches to the clamping state through the lifting and clamping assembly. When it reaches the highest position or the initial lowest position, it automatically switches to the releasing state through the lifting and clamping assembly. Unlike the prior art, there is no need to control the clamping and releasing through two separate switching operations, which simplifies the detection operation steps.

[0004] This invention provides the following technical solution: a steel structure warpage detection device and its detection method, comprising a protective shell assembly, a lifting clamping assembly, and an optical detection assembly; The protective housing assembly includes a housing base, and the housing base has a placement cavity inside; The lifting clamping assembly includes two sets of connecting ear plates a symmetrically fixedly connected to the surface of the placement cavity. Each set of connecting ear plates a has a rotating shaft rotatably connected to its inner cavity. Both ends of the rotating shaft are fixedly connected to a follower. One end of each follower is provided with a clamping groove, and one end of the follower is also provided with a release groove. The clamping groove and the release groove are in communication. Two sets of connecting ear plates b are symmetrically fixedly connected to the placement cavity surface below the connecting ear plate a. Each set of connecting ear plates b has a trigger element rotatably connected to its inner cavity via a pin. A connecting rod is embedded in the inner cavity of the trigger element.

[0005] As a preferred embodiment of the present invention, the lifting clamping assembly further includes two rollers rotatably connected to the surface of the connecting rod, the surface of each roller being in contact with the surface of the release groove, the inner cavity of the placement cavity being slidably connected to two clamping plates via guide grooves, each clamping plate being provided with an elastic element between it and the guide groove, the elastic element being a spring, each clamping plate being rotatably connected to the triggering element via a pin, and the inner wall of the placement cavity being fixedly connected with a plurality of mating parts that cooperate with the driven element.

[0006] As a preferred embodiment of the present invention, the lifting clamping assembly further includes two lifting components symmetrically fixedly connected to the housing base. The lifting components are electric push rods, and the output end of each lifting component passes through the bottom of the housing base and is connected to the bottom of the placement cavity.

[0007] As a preferred embodiment of the present invention, the protective housing assembly further includes an end cap detachably connected to the top of the housing base, wherein the top of the end cap is provided with a clearance groove, the size of which is greater than or equal to the size of the placement cavity.

[0008] As a preferred embodiment of the present invention, the optical detection assembly includes mounting holes symmetrically formed on the inner wall of the placement cavity, and a laser detector is installed in the inner cavity of each mounting hole.

[0009] As a preferred embodiment of the present invention, a control panel is fixedly connected to the surface of the outer shell base, and the control panel is electrically connected to the laser detector and the lifting component.

[0010] In a preferred embodiment of the present invention, the driven member is a gear, the mating member is a rack, and the driven member and the mating member are connected by meshing.

[0011] As a preferred technical solution of the present invention, S1, the arc-shaped profiled steel sheet to be tested is hoisted into the inner cavity of the placement cavity. At this time, the placement cavity is at the initial lowest position of the outer shell base, the roller is located in the release groove, and the two clamps are in the retracted state. S2. Start the lifting mechanism via the control panel. The lifting mechanism will move the placement cavity upward. S3. During the movement of the placement cavity, the driven part on its surface contacts and rotates with the mating part on the inner wall of the outer shell base, causing the roller to gradually enter the inner cavity of the clamping groove from the release groove. S4. The roller presses the connecting rod, causing the trigger to rotate around the connecting ear plate b. The trigger pushes the two clamping plates to move relative to each other along the guide groove and compresses the elastic element, so that the clamping plates hold the two ends of the arc-shaped profiled steel sheet and apply external force, causing the component to deform along the arc-shaped radial direction. S5. Start the laser detector through the control panel, scan the arc contour of the arc-shaped profiled steel sheet to obtain warpage data, and display it on the control panel; S6. When the placement cavity moves to the highest point through the relief groove and is flush with the end cover, the driven part rotates one revolution, the roller returns to the release groove, the trigger rotates in the opposite direction, and the clamping plate contracts and releases under the elastic force of the elastic element. The completed arc-shaped profiled steel sheet is taken out and a new piece to be tested is placed in. S7. The lifting component moves the placement cavity downwards, the driven component rotates again to make the roller enter the clamping slot, the clamping plate re-clamps the new piece to be tested, and the laser detector scans again to obtain warpage data. S8. When the placement cavity returns to the initial lowest position, the driven part rotates one revolution, the roller returns to the release slot, the clamp retracts and releases, completing one detection cycle.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves control over the clamping and release of the arc-shaped profiled steel sheet by linking the lifting and lowering action of the placement cavity with the lifting and clamping assembly. During the lifting and lowering process of the placement cavity, the clamping plate automatically switches to the clamping state through the lifting and clamping assembly, and automatically switches to the release state through the lifting and clamping assembly when it reaches the highest or initial lowest position. Unlike the prior art, there is no need to control the clamping and release separately through two independent switching operations, which simplifies the detection operation steps. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A sectional view; Figure 3 For the present invention Figure 1 Disassembly diagram; Figure 4 For the present invention Figure 3 Partial disassembly diagram; Figure 5 For the present invention Figure 4 Partial disassembly diagram; Figure 6 For the present invention Figure 5 Partial disassembly diagram; Figure 7 For the present invention Figure 6 Partial disassembly diagram; Figure 8 For the present invention Figure 5 A magnified view of a portion of the image.

[0014] In the diagram: 1. Outer shell base; 101. Placement cavity; 2. Connecting ear plate a; 201. Rotating shaft; 202. Follower; 203. Clamping groove; 204. Release groove; 205. Connecting ear plate b; 206. Trigger; 207. Connecting rod; 208. Roller; 209. Clamping plate; 210. Elastic element; 211. Mating element; 212. Lifting element; 3. End cap; 301. Relief groove; 4. Mounting hole; 401. Laser detector; 5. Control panel. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-8 As shown, a steel structure warpage detection device and its detection method include a protective shell assembly, a lifting clamping assembly, and an optical detection assembly; The protective housing assembly includes a housing base 1, and the housing base 1 has a placement cavity 101 inside; The outer casing base 1 serves as the overall supporting base of the equipment, providing an installation reference for components such as the lifting component 212 and the mating component 211; the placement cavity 101 is used to position and place the workpiece to be tested, ensuring that both ends of the workpiece are aligned with the clamping area of ​​the clamping plate 209. The lifting clamping assembly includes two sets of connecting ear plates a2 symmetrically fixedly connected to the surface of the placement cavity 101. The inner cavity of each set of connecting ear plates a2 is rotatably connected to a rotating shaft 201. Both ends of the rotating shaft 201 are fixedly connected to a follower 202. One end of each follower 202 is provided with a clamping groove 203, and one end of the follower 202 is also provided with a release groove 204. The clamping groove 203 and the release groove 204 are in communication. The connecting ear plate a2 provides rotational support for the rotating shaft 201, and the rotating shaft 201 synchronously drives the driven members 202 at both ends to rotate; the clamping groove 203 and the release groove 204 on the driven member 202 are connected, and the displacement state of the roller 208 is controlled by the groove position switching, which is then converted into the clamping or releasing action of the clamping plate 209. The symmetrical arrangement of the two sets of connecting ear plates a2 ensures that the rotating shaft 201 is subjected to balanced force, avoiding transmission jamming caused by unilateral tilting; the synchronous rotation of both ends of the driven member 202 realizes consistent clamping action on both sides, improving the workpiece clamping stability; the connection design between the clamping slot 203 and the release slot 204 provides a key carrier for the mechanical linkage of "lifting drive or slot cutting and clamping or releasing", and the state transition can be completed without additional manual switches; Two sets of connecting ear plates b205 are symmetrically fixedly connected to the surface of the placement cavity 101 below the connecting ear plate a2. The inner cavity of each set of connecting ear plates b205 is rotatably connected to a trigger 206 through a pin. The inner cavity of the trigger 206 is embedded with a connecting rod 207. The connecting ear plate b205 provides a rotation fulcrum for the trigger 206. The trigger 206 realizes the direction conversion of force through the pin, converting the radial force transmitted by the connecting rod 207 into a horizontal force that pushes the clamping plate 209. The connecting rod 207 is embedded in the inner cavity of the trigger 206, realizing a rigid connection between the roller 208 and the trigger 206. The symmetrically arranged connecting ear plate b205 and trigger 206 ensure that the movement of the two clamping plates 209 is synchronized, avoiding workpiece clamping deviation; the lever-type rotating structure of the trigger 206 reduces force transmission loss, and the embedded design of the connecting rod 207 improves the integrity of the linkage structure and reduces movement delay caused by loosening. The lifting clamping assembly also includes two rollers 208 rotatably connected to the surface of the connecting rod 207. The surface of each roller 208 is in contact with the surface of the release groove 204. The inner cavity of the placement cavity 101 is slidably connected to two clamping plates 209 through the guide groove. Each clamping plate 209 is provided with an elastic element 210 between itself and the guide groove. The elastic element 210 is a spring. Each clamping plate 209 is rotatably connected to the triggering element 206 through a pin. The inner wall of the placement cavity 101 is fixedly connected with a plurality of mating parts 211 that cooperate with the driven element 202. Roller 208 rolls within the groove of follower 202, converting sliding friction into rolling friction and reducing resistance during groove switching; guide groove restricts the movement trajectory of clamping plate 209, ensuring precise clamping along both ends of the workpiece; elastic element 210 (spring) stores energy when clamped by clamping plate 209 and provides reset power when released; mating part 211 cooperates with follower 202 to drive the latter to rotate; The guide groove ensures the precise clamping position of the clamping plate 209, avoiding detection errors caused by uneven force on the workpiece; the spring-type elastic element 210 realizes the automatic reset of the clamping plate 209 without the need for additional driving components. The lifting clamping assembly also includes two lifting components 212 that are symmetrically fixedly connected to the housing base 1. The lifting component 212 is an electric push rod, and the output end of each lifting component 212 passes through the bottom of the housing base 1 and is connected to the bottom of the placement cavity 101. The electric push rod type lifting component 212 serves as a power source, and through the extension and retraction of the telescopic rod, it drives the placement cavity 101 to rise and fall vertically along the outer shell base 1. The linear drive characteristics of the electric actuator enable precise control of the lifting speed and stroke of the placement cavity 101, providing a stable displacement basis for the meshing transmission between the driven part 202 and the mating part 211. The protective housing assembly also includes an end cap 3 that is detachably connected to the top of the housing base 1. The top of the end cap 3 is provided with a clearance groove 301, the size of which is greater than or equal to the size of the placement cavity 101. End cap 3 covers the top of housing base 1, forming a closed protective space; clearance groove 301 provides clearance passage for placement cavity 101 to rise to the highest point, ensuring that placement cavity 101 can pass smoothly and be flush with end cap 3. The end cap 3 effectively blocks external dust and impurities from entering the equipment, avoiding interference with the scanning accuracy of the laser detector 401 and the linkage stability of mechanical components; the detachable design facilitates the inspection and maintenance of internal components; the size adaptation design of the clearance groove 301 ensures smooth lifting of the placement cavity 101, while forming a flat working surface at the highest point, which facilitates workpiece replacement. The optical detection assembly includes mounting holes 4 symmetrically opened on the inner wall of the placement cavity 101, and a laser detector 401 is installed in the inner cavity of each mounting hole 4; Mounting hole 4 provides precise mounting and positioning for laser detector 401, ensuring that the scanning direction of the detector is aligned with the arc-shaped contour of the workpiece inside placement cavity 101; the symmetrically arranged laser detector 401 scans simultaneously from both sides, covering the peaks, valleys and edge areas of the workpiece. A control panel 5 is fixedly connected to the surface of the outer base 1. The control panel 5 is electrically connected to the laser detector 401 and the lifting component 212. The control panel 5 integrates a control module and a display module, and realizes the start and stop control of the lifting action of the lifting component 212, as well as the scanning trigger and data reception and display of the laser detector 401 through electrical connection; The driven member 202 is a gear, and the mating member 211 is a rack. The driven member 202 and the mating member 211 are connected by meshing. When the placement cavity 101 is raised or lowered, the gear-shaped driven member 202 meshes with the rack-shaped mating member 211, converting the vertical linear motion of the placement cavity 101 into the rotational motion of the driven member 202, thereby driving the slot switching and clamping action. S1. The arc-shaped profiled steel sheet to be tested is hoisted into the inner cavity of the placement cavity 101. At this time, the placement cavity 101 is at the initial lowest position of the outer shell base 1, the roller 208 is located in the release groove 204, and the two clamping plates 209 are in the retracted state. S2. Start the lifting component 212 via the control panel 5. The lifting component 212 drives the placement cavity 101 to move upward. S3. During the movement of the placement cavity 101, the driven part 202 on its surface contacts and rotates with the mating part 211 on the inner wall of the outer shell base 1, causing the roller 208 to gradually enter the inner cavity of the clamping groove 203 from the release groove 204. S4. Roller 208 presses the connecting rod 207, causing the trigger 206 to rotate around the connecting ear plate b205. The trigger 206 pushes the two clamping plates 209 to move relative to each other along the guide groove and compresses the elastic member 210, so that the clamping plates 209 clamp the two ends of the arc-shaped profiled steel sheet and apply external force, causing the component to deform along the arc-shaped radial direction. S5. Start the laser detector 401 through the control panel 5, scan the arc contour of the arc-shaped profiled steel sheet to obtain warpage data, and display it on the control panel 5. S6. When the placement cavity 101 moves to the highest position through the relief groove 301 and is flush with the end cover 3, the follower 202 rotates one revolution, the roller 208 returns to the release groove 204, the trigger 206 rotates in the opposite direction, and the clamping plate 209 contracts and releases under the elastic force of the elastic member 210. The arc-shaped profiled steel sheet that has been tested is taken out and a new piece to be tested is placed in it. S7. The lifting component 212 drives the placement cavity 101 to move downward, the driven component 202 rotates again to make the roller 208 enter the clamping groove 203, the clamping plate 209 re-clamps the new piece to be tested, and the laser detector 401 scans again to obtain warpage data. S8. When the placement cavity 101 returns to the initial lowest position, the follower 202 rotates one revolution, the roller 208 returns to the release groove 204, and the clamping plate 209 retracts and releases, completing one detection cycle.

[0017] In the initial state, the roller 208 is located in the release groove 204 and is in contact with the groove surface. The two clamping plates 209 are in a retracted state, and the placement cavity 101 is at the lowest point of the outer shell base 1. At this time, the arc-shaped profiled steel sheet to be tested is hoisted into the inner cavity of the placement cavity 101 to ensure that both ends of the steel sheet are within the clamping area of ​​the clamping plates 209. After the device is started, the lifting component 212 drives the placement cavity 101 to move upward. The driven component 202 on the surface of the placement cavity 101 contacts and rotates with the mating component 211, causing the roller 208 to gradually slide from the release groove 204 into the inner cavity of the clamping groove 203 along the connection between the two grooves. The roller 208 presses the connecting rod 207, causing the trigger component 206 to rotate around the connecting ear plate b205. The trigger component 206 pushes the two clamping plates 209 to move relative to each other along the guide groove of the placement cavity 101. At the same time, the clamping plate 209 compresses the elastic component 210 spring. At this time, the clamping plate 209 is in a clamping state, applying external force to both ends of the arc-shaped profiled steel plate, causing the component to deform along the arc radial direction, so that the hidden warping defects are fully revealed. Then, the laser detector 401 is started through the control panel 5 to scan the arc contour of the arc-shaped profiled steel sheet to obtain warpage data, which is then displayed on the control panel 5. When the placement cavity 101 moves to its highest position through the relief groove 301 and is flush with the end cover 3, the follower 202 rotates one revolution, the roller 208 returns to the release groove 204, the trigger 206 rotates in the opposite direction, and the clamping plate 209 contracts and releases under the elastic force of the elastic member 210; at this time, the arc-shaped profiled steel sheet that has been tested can be taken out and a new piece to be tested can be placed in it. Subsequently, the lifting component 212 drives the placement cavity 101 to move downward, the driven component 202 rotates again, causing the roller 208 to re-enter the clamping groove 203, the clamping plate 209 simultaneously clamps the new workpiece to be tested, and the laser detector 401 scans again to obtain warpage data. When the placement cavity 101 returns to the initial lowest position, the follower 202 rotates one revolution, the roller 208 returns to the release groove 204, and the clamping plate 209 retracts and releases. In summary, during the lifting and lowering process of the placement cavity 101, the clamping plate 209 is in a clamping state, and when it is at the highest point or the initial position, it is in a released and retracted state, thereby realizing the warpage detection of the two arc-shaped profiled steel plates during the lifting and lowering process of the placement cavity 101.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this invention, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0019] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the warpage of steel structures, characterized in that, include: Protective housing components, lifting and clamping components, and optical detection components; The protective housing assembly includes a housing base (1), and the housing base (1) has a placement cavity (101). The lifting clamping assembly includes two sets of connecting ear plates a (2) symmetrically fixedly connected to the surface of the placement cavity (101). The inner cavity of each set of connecting ear plates a (2) is rotatably connected to a rotating shaft (201). Both ends of the rotating shaft (201) are fixedly connected to a follower (202). One end of each follower (202) is provided with a clamping groove (203), and one end of the follower (202) is also provided with a release groove (204). The clamping groove (203) and the release groove (204) are connected. Two sets of connecting ear plates b (205) are symmetrically fixedly connected to the surface of the placement cavity (101) below the connecting ear plate a (2). The inner cavity of each set of connecting ear plates b (205) is rotatably connected to a trigger (206) via a pin. The inner cavity of the trigger (206) is fitted with a connecting rod (207).

2. The steel structure warpage detection device according to claim 1, characterized in that: The lifting clamping assembly also includes two rollers (208) rotatably connected to the surface of the connecting rod (207). The surface of each roller (208) is in contact with the surface of the release groove (204). The inner cavity of the placement cavity (101) is slidably connected to two clamping plates (209) through a guide groove. Each clamping plate (209) is provided with an elastic element (210) between itself and the guide groove. The elastic element (210) is a spring. Each clamping plate (209) is rotatably connected to the triggering element (206) through a pin. The inner wall of the placement cavity (101) is fixedly connected with a plurality of mating parts (211) that cooperate with the driven element (202).

3. The steel structure warpage detection device according to claim 1, characterized in that: The lifting clamping assembly also includes two lifting components (212) symmetrically fixedly connected to the outer shell base (1). The lifting components (212) are electric push rods, and the output end of each lifting component (212) passes through the bottom of the outer shell base (1) and is connected to the bottom of the placement cavity (101).

4. The steel structure warpage detection device according to claim 1, characterized in that: The protective housing assembly also includes an end cap (3) detachably connected to the top of the housing base (1), the top of the end cap (3) having a relief groove (301) the size of which is greater than or equal to the size of the placement cavity (101).

5. The steel structure warpage detection device according to claim 1, characterized in that: The optical detection assembly includes mounting holes (4) symmetrically opened on the inner wall of the placement cavity (101), and a laser detector (401) is installed in the inner cavity of each mounting hole (4).

6. The steel structure warpage detection device according to claim 5, characterized in that: A control panel (5) is fixedly connected to the surface of the outer casing base (1), and the control panel (5) is electrically connected to the laser detector (401) and the lifting component (212).

7. The steel structure warpage detection device according to claim 2, characterized in that: The driven member (202) is a gear, the mating member (211) is a rack, and the driven member (202) and the mating member (211) are connected by meshing.

8. The method for detecting the warpage of a steel structure according to claim 1, characterized in that, A steel structure warpage detection device according to any one of claims 1-7, the specific method includes the following steps; S1. The arc-shaped profiled steel sheet to be tested is hoisted into the inner cavity of the placement cavity (101). At this time, the placement cavity (101) is at the initial lowest position of the outer shell base (1), the roller (208) is located in the release groove (204), and the two clamps (209) are in the retracted state. S2. Start the lifting component (212) via the control panel (5). The lifting component (212) drives the placement cavity (101) to move upward. S3. During the movement of the placement cavity (101), the driven part (202) on its surface contacts and rotates with the mating part (211) on the inner wall of the outer shell base (1), causing the roller (208) to gradually enter the inner cavity of the clamping groove (203) from the release groove (204); S4. The roller (208) squeezes the connecting rod (207), causing the trigger (206) to rotate around the connecting ear plate b (205). The trigger (206) pushes the two clamping plates (209) to move relative to each other along the guide groove and compress the elastic element (210), so that the clamping plates (209) clamp the two ends of the arc-shaped profiled steel sheet and apply external force, causing the component to deform along the arc-shaped radial direction. S5. Start the laser detector (401) through the control panel (5), scan the arc contour of the arc-shaped profiled steel sheet to obtain warpage data, and display it on the control panel (5); S6. When the placement cavity (101) moves to the highest point through the relief groove (301) and is flush with the end cover (3), the follower (202) rotates one revolution, the roller (208) returns to the release groove (204), the trigger (206) rotates in the opposite direction, and the clamp (209) contracts and releases under the elastic force of the elastic member (210). The arc-shaped profiled steel sheet that has been tested is taken out and a new piece to be tested is put in. S7. The lifting component (212) drives the placement cavity (101) to move downward, and the driven component (202) rotates again to make the roller (208) enter the clamping groove (203). The clamping plate (209) clamps the new test piece again, and the laser detector (401) scans again to obtain warpage data. S8. When the placement cavity (101) returns to the initial lowest position, the follower (202) rotates one revolution, the roller (208) returns to the release groove (204), and the clamp (209) retracts and releases, completing one detection cycle.

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