Longeron punching line detection device

Abstract

The utility model describes a kind of longitudinal beam punching online detection device, through the multidimensional layout of wing surface reference side detection laser sensor, wing surface floating side detection laser sensor and abdominal surface detection laser sensor, the punching position of longitudinal beam wing surface and abdominal surface, aperture size can be carried out high-precision non-contact measurement, avoid the missed detection, misdiagnosis problem caused by visual fatigue or operating error of artificial detection.Simultaneously, floating side detection laser sensor of floating side cross brace cooperation electric cylinder drive, different width specification longitudinal beam can be self-adapting, improve the application range of device.Through real-time detection, abnormal working conditions such as mold fracture, positioning deviation can be found in time, avoid batch missing punching or misplacement defect to flow into subsequent process, reduce the whole vehicle rework operation caused by punching quality problem, reduce quality loss cost.In addition, the automatic operation of device reduces artificial detection link, reduces labor cost and the influence of human factor on product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of longitudinal beam processing and testing equipment, specifically an online testing device for longitudinal beam punching. Background Technology

[0002] As a core load-bearing component of the vehicle body frame, the longitudinal beam of an automobile typically ranges in length from 6 to 12 meters. It requires the machining of hundreds of holes with more than a dozen specifications. Taking the longitudinal beam of a heavy-duty truck as an example, the punching accuracy directly affects the overall vehicle safety, assembly compatibility, and collision performance. Currently, the industry generally uses CNC stamping equipment to achieve flexible and automated production. However, the large number of molds and the semi-enclosed assembly state make it difficult to detect missed punching problems caused by mold breakage through manual visual inspection. At the same time, the length of the longitudinal beam leads to the accumulation of hole spacing deviations during processing. Traditional batch manual sampling inspection methods are inefficient, with a single-piece inspection taking about 15 to 30 minutes and unable to cover the full-size inspection requirements. If the problem is left over to the assembly stage, it will lead to the rework of the entire vehicle, resulting in serious consequences with costs of up to hundreds of thousands of yuan. Utility Model Content

[0003] The purpose of this invention is to provide an online inspection device for punching holes in longitudinal beams, which can replace traditional manual inspection. After the holes in the longitudinal beams are punched, it can accurately inspect all the holes punched on the longitudinal beams, thus solving the problems in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an online detection device for longitudinal beam punching, including side-by-side support frames, each support frame having a movable upright frame installed on it, and a crossbeam between the tops of the two upright frames. A reference side cross brace is installed in one of the upright frames, and a wing surface reference side detection laser sensor is installed on the reference side cross brace. A floating side cross brace is installed in the other upright frame, and an electric cylinder is installed on the floating side cross brace. A wing surface floating side detection laser sensor that can move relative to the floating side cross brace is installed on the output shaft of the electric cylinder. The wing surface floating side detection laser sensor and the wing surface reference side detection laser sensor are... Correspondingly, laser signal switches are installed inside both uprights. A ventral detection laser sensor is installed at the bottom of the crossbeam, located between the wing reference side detection laser sensor and the wing floating side detection laser sensor. A vertically movable ventral detection wheel is also installed at the bottom of the crossbeam, with a ventral length encoder mounted on its shaft. A vertically arranged support is also installed between the two support frames, located on one side of the floating side cross brace. A horizontally retractable wing detection roller is installed on the support, with a wing length encoder mounted on its shaft. A protective plate frame is installed on the crossbeam. The ventral detection laser sensor is located inside the protective plate frame. A lifting cylinder is installed on the protective plate frame. A top plate is provided on the piston rod of the lifting cylinder. Vertical plates are provided at both ends of the length direction of the top plate. A limiting plate is provided on one side of the two vertical plates. A pressure plate is provided on the other side of the vertical plates. A lifting plate is installed between the limiting plate and the pressure plate. A support plate is provided at both ends of the lifting plate. A rotating shaft is installed between the two support plates. The ventral detection wheel is installed on the rotating shaft. A guide post is installed between the lifting plate and the top plate. Both the lifting plate and the top plate have through holes that allow the guide post to pass through. The end of the guide post that passes through the top plate has a protruding edge with a diameter larger than the diameter of the through hole. The end of the guide post that passes through the lifting plate has a detachable limiting pin. A first spring is fitted around the outer periphery of the guide post between the lifting plate and the top plate. The first spring always tends to keep the lifting plate away from the top plate. A horizontally arranged telescopic cylinder is installed on the support. The piston rod end of the telescopic cylinder is provided with a floating rod. The diameter of the floating rod is smaller than that of the piston rod. A telescopic push plate is installed on the floating rod. The telescopic push plate has a through hole that allows the floating rod to pass through. A limit nut is installed on the end of the floating rod that passes through the telescopic push plate. The diameter of the limit nut is larger than that of the through hole. A second spring is installed on the outer periphery of the floating rod between the telescopic push plate and the piston rod. The second spring always tends to push the telescopic push plate away from the piston rod. Two end plates are installed vertically on the side of the telescopic push plate away from the support. A wing surface detection roller is installed between the two end plates. A guide rod is installed on the side of the telescopic push plate close to the support. A guide sleeve that cooperates with the guide rod is provided on the support.The top of the support frame is equipped with a guide rail plate, and the bottom of the upright frame is provided with a sliding plate that mates with the guide rail plate. C-shaped fixing plates are installed on both sides of the sliding plate and the guide rail plate along their length. A top tightening bolt is installed at the bottom of the C-shaped fixing plate, and a matching connecting bolt is installed between the upper part of the C-shaped fixing plate and the sliding plate. Tightening the top tightening bolt and the connecting bolt locks the upright frame onto the guide rail plate. Stops are also provided at both ends of the guide rail plate along its length. Diagonal braces are also provided between the guide rail plate and the support frame. A base plate is provided at the bottom of the support frame, and movable anchor bolts are installed at the four corners of the base plate. Reinforcing ribs are also installed between the base plate and the support frame.

[0005] The advantages of this invention are as follows: The online detection device for longitudinal beam punching, through a multi-dimensional layout of a reference side detection laser sensor, a floating side detection laser sensor, and a surface detection laser sensor, enables high-precision non-contact measurement of the punching position and diameter of the longitudinal beam's wing and surface. This avoids the problems of missed or false detections caused by visual fatigue or operational errors in manual inspection. Furthermore, the floating side cross brace, combined with the electric cylinder-driven floating side detection laser sensor, can adapt to longitudinal beams of different widths, thus expanding the device's applicability.

[0006] This device can be integrated into the longitudinal beam punching production line, enabling online inspection during the punching process. It eliminates the need for material transfer or waiting for batch sampling, significantly reducing single-piece inspection time and greatly improving efficiency compared to traditional manual sampling. Combined with web and wing length encoders, it records the spacing data of each hole along the longitudinal beam's length in real time. A dynamic compensation algorithm eliminates accumulated errors during processing, ensuring full-size inspection coverage and effectively preventing assembly problems caused by hole spacing deviations. Real-time inspection can promptly detect abnormal conditions such as mold breakage and positioning deviations, preventing batch-sized missed or misaligned holes from flowing into subsequent processes, reducing rework operations caused by punching quality issues, and lowering quality loss costs. Furthermore, the automated operation of the device reduces manual inspection steps, lowering labor costs and reducing the impact of human factors on product quality. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 2 The left view; Figure 4 yes Figure 2 Top view; Figure 5 yes Figure 2 Rear view; Figure 6This is a schematic diagram of the installation of the ventral length measuring encoder on the crossbeam; Figure 7 yes Figure 6 A half-sectional view of the location of the guide pillars in the structure; Figure 8 This is a schematic diagram of the installation of the wing surface inspection roller on the support; Figure 9 yes Figure 8 Half-section view of the middle structure; Figure 10 This is a schematic diagram of the connection structure between the support frame and the upright frame; Figure 11 This is a structural diagram of the support frame. Detailed Implementation

[0008] The present invention provides an online detection device for punching holes in longitudinal beams, such as... Figure 1-5 As shown, it includes a support frame 1 arranged side by side, each support frame 1 is equipped with a movable upright 2, and a crossbeam 3 is provided between the tops of the two uprights 2. The support frame 1 is used to install on the ground. A reference side cross brace 4 is installed in one of the uprights 2, and a wing reference side detection laser sensor 5 is provided on the reference side cross brace 4. A floating side cross brace 6 is installed in the other upright 2, and an electric cylinder 7 is provided on the floating side cross brace 6. A wing floating side detection laser sensor 8 that can move relative to the floating side cross brace 6 is installed on the output shaft of the electric cylinder 7. The wing floating side detection laser sensor 8 and the wing reference side detection laser sensor 5 are arranged correspondingly.

[0009] The longitudinal beam to be tested moves between the reference side cross brace 4 and the floating side cross brace 6, and the openings on the longitudinal beam's wing surface are detected by the wing surface reference side detection laser sensor 5 and the wing surface floating side detection laser sensor 8. The wing surface floating side detection laser sensor 8 can be adaptively adjusted according to longitudinal beams of different widths to improve the applicability of the device to longitudinal beams of different specifications.

[0010] Both sides of the upright frame 2 are equipped with laser signal switches 9. The bottom of the crossbeam 3 is equipped with a ventral detection laser sensor 10. The ventral detection laser sensor 10 is located between the wing reference side detection laser sensor 5 and the wing floating side detection laser sensor 8. It can detect the openings on the web of the longitudinal beam. The laser signal switch 9 is connected to the wing floating side detection laser sensor 8, the wing reference side detection laser sensor 5 and the ventral detection laser sensor 10 through a control circuit. After passing through the laser signal switch 9 at the end of the longitudinal beam, the wing floating side detection laser sensor 8, the wing reference side detection laser sensor 5 and the ventral detection laser sensor 10 can be activated to detect the openings on the wing plate and web of the longitudinal beam.

[0011] The wing-floating side detection laser sensor 8, the wing-reference side detection laser sensor 5, and the ventral side detection laser sensor 10 can be the wing-plane laser contour sensor and ventral side laser contour sensor mentioned in the Chinese patent publication number "CN115839676A": Automatic Detection Device and Detection Method for Longitudinal Beam Holes of Commercial Vehicles, which can perform all-round detection of openings on the longitudinal beam wing plate and web plate.

[0012] To measure the moving distance of the longitudinal beam, a vertically movable web detection wheel 11 is installed at the bottom of the crossbeam 3. A web length encoder 12 is installed on the shaft of the web detection wheel 11. After the web detection wheel 11 is lowered to contact the web of the longitudinal beam, the movement of the longitudinal beam can drive the web detection wheel 11 to rotate. The moving distance of the longitudinal beam can be measured by the web length encoder 12.

[0013] The aforementioned web surface detection wheel 11 can measure the moving distance of the longitudinal beam web. When the length of the workpiece wing plate is greater than the web length, in order to continue detection after the web surface length measuring encoder 12 moves out of the beam tail of the workpiece to be detected, and to complete the hole position detection of the entire longitudinal beam, a vertically arranged support 13 is also installed between the two side support frames 1. The support 13 is located on one side of the floating side cross brace 6. A horizontally retractable wing surface detection roller 14 is installed on the support 13, and a wing surface length measuring encoder 15 is installed on the rotating shaft of the wing surface detection roller 14. After the wing surface detection roller 14 moves to contact the wing plate of the longitudinal beam, the movement of the longitudinal beam can drive the wing surface detection roller 14 to rotate. The moving distance of the longitudinal beam can be measured by the wing surface length measuring encoder 15. The wing surface detection roller 14 is located on one side of the floating side cross brace 6 and can be synchronously adjusted with the wing surface floating side detection laser sensor 8 according to different width types of longitudinal beams.

[0014] When using the online inspection device for punching longitudinal beams, the process flow is as follows: The three-sided punch sends the model information of the longitudinal beam being punched → The vision system receives the longitudinal beam information and retrieves the corresponding process document on the industrial control computer → The three-sided punch transports the longitudinal beam to the set position at the beam head → The front encoder presses down to trigger the line signal of the camera system → The longitudinal beam continues to be transported to the laser signaling switch 9 and triggers the frame signal of the camera system → The camera system starts scanning → The three-sided punch transports the longitudinal beam to the set position at the beam tail → The rear encoder presses down → The camera system switches encoders → The longitudinal beam automatically leaves the camera scanning area → The vision system finishes scanning → The vision system compares the scanned information with the input information → The vision system outputs the comparison result and feeds it back to the three-sided punch.

[0015] In conjunction with the various structures in this device, its specific operation process is as follows: The three-sided punch conveys the longitudinal beam to the set position, and the beam head stops at the set position → The web surface detection wheel 11 presses down and contacts the longitudinal beam, the web surface length encoder 12 rotates, triggering the line signal of the hole position detection system → The longitudinal beam continues to be conveyed forward, and the beam head is conveyed to the laser signaling switch 9. The laser switch sends a signal, triggering the frame signal of the hole position detection system → The web surface detection laser sensor 10, the wing surface reference side detection laser sensor 5, and the wing surface floating side detection laser sensor 8 are activated and begin scanning the hole position information → The longitudinal beam continues to be conveyed forward, and the beam head is conveyed to the laser signaling switch 9. The laser signaling switch sends a signal, triggering the frame signal of the hole position detection system → The web surface detection laser sensor 10, the wing surface reference side detection laser sensor 5, and the wing surface floating side detection laser sensor 8 are activated and begin scanning the hole position information → The longitudinal beam continues to be conveyed forward, and the beam head stops at the set position. The beam continues to be conveyed, and the tail of the beam is conveyed to the set position. The wing surface detection roller 14 contacts the wing surface of the longitudinal beam, the wing surface length encoder 15 rotates, the hole position detection system switches the encoder signal source, and the underside detection laser sensor 10, the wing surface reference side detection laser sensor 5, and the wing surface floating side detection laser sensor 8 continue scanning. The line signal and frame signal disappear, and the camera stops scanning. The longitudinal beam automatically leaves the camera scanning area. The vision system finishes scanning. The vision system compares the scanned information with the input information. The vision system outputs the comparison result and feeds it back to the three-sided punch.

[0016] Furthermore, in order to realize the vertical lifting and lowering of the ventral surface detection wheel 11, a protective plate frame 16 can be installed on the crossbeam 3. The ventral surface detection laser sensor 10 is located inside the protective plate frame 16, and the protective plate frame 16 can play a corresponding protective role for the ventral surface detection laser sensor 10.

[0017] like Figure 6 and Figure 7 As shown, a lifting cylinder 17 is installed on the guard plate frame 16. A top plate 18 is provided on the piston rod of the lifting cylinder 17. When the piston rod of the lifting cylinder 17 extends or retracts, it can drive the top plate 18 to rise or fall vertically. Vertical plates 19 are provided at both ends of the length direction of the top plate 18. A limiting plate 20 is provided on one side of the two vertical plates 19, and a pressure plate 21 is provided on the other side of the vertical plates 19. A lifting plate 22 is installed between the limiting plate 20 and the pressure plate 21. The lifting plate 22 can move relative to the top plate 18 within the guide cavity formed by the limiting plate 20, the pressure plate 21, and the vertical plates 19.

[0018] The lifting plate 22 has support plates 23 at both ends along its length, and a rotating shaft 24 is installed between the two support plates 23. The ventral detection wheel 11 is installed on the rotating shaft 24, thereby realizing the rotation detection after the ventral detection wheel 11 contacts the web of the longitudinal beam.

[0019] To achieve vertical movement limitation between the lifting plate 22 and the top plate 18, a guide post 25 is installed between the lifting plate 22 and the top plate 18. Both the lifting plate 22 and the top plate 18 have through holes through which the guide post 25 can pass. One end of the guide post 25 that passes through the top plate 18 has a protruding edge 26, the diameter of which is larger than the diameter of the through hole. One end of the guide post 25 that passes through the lifting plate 22 has a detachable limiting pin 27, allowing the guide post 25 to be detachably installed between the lifting plate 22 and the top plate 18.

[0020] A first spring 28 is fitted around the guide post 25 between the lifting plate 22 and the top plate 18. The first spring 28 always tends to keep the lifting plate 22 away from the top plate 18. When the piston rod of the lifting cylinder 17 extends, it can simultaneously drive the top plate 18, the lifting plate 22, and the ventral detection wheel 11 to move down and contact the web of the longitudinal beam. The first spring 28 can play a corresponding elastic buffering role after contact, which can adapt to the undulations on the surface of the longitudinal beam web and prevent the ventral detection wheel 11 from being damaged by the lifting cylinder 17 after contacting and limiting the longitudinal beam.

[0021] Furthermore, in order to achieve horizontal movement of the wing surface detection roller 14, such as Figure 8 and Figure 9 As shown, a horizontally arranged telescopic cylinder 29 can be installed on the support 13. The piston rod end of the telescopic cylinder 29 is provided with a floating rod 30. The diameter of the floating rod 30 is smaller than the diameter of the piston rod. A telescopic push plate 31 is installed on the floating rod 30. The floating rod 30 can move relative to the telescopic push plate 31.

[0022] The telescopic push plate 31 has a through hole through which the floating rod 30 can pass. A limit nut 32 is installed at the end of the floating rod 30 that passes through the telescopic push plate 31. The diameter of the limit nut 32 is larger than the diameter of the through hole. A second spring 33 is installed on the outer periphery of the floating rod 30 between the telescopic push plate 31 and the piston rod. The second spring 33 always tends to keep the telescopic push plate 31 away from the piston rod. Two end plates 34 arranged vertically are installed on the side of the telescopic push plate 31 away from the support 13. A wing surface detection roller 14 is installed between the two end plates 34. A guide rod 35 is installed on the side of the telescopic push plate 31 close to the support 13. A guide sleeve 36 that cooperates with the guide rod 35 is provided on the support 13.

[0023] When the piston rod of the telescopic cylinder 29 extends, it drives the wing surface detection roller 14 to move until it contacts the wing plate of the longitudinal beam. The second spring 33 acts as an elastic floating buffer, accommodating the undulations on the surface of the wing plate after the wing surface detection roller 14 contacts it, while also ensuring that the wing surface detection roller 14 is pressed firmly against the wing plate. The guide rod 35 and guide sleeve 36 provide necessary guidance for the horizontal movement of the telescopic push plate 31, allowing the wing surface detection roller 14 on the telescopic push plate 31 to move horizontally until it contacts the wing plate of the longitudinal beam, preventing the wing surface detection roller 14 from tilting and pressing against the wing plate, thus ensuring accurate measurement of the wing plate movement distance.

[0024] Furthermore, in order to allow sufficient space between the wing-side floating detection laser sensor 8 and the wing detection roller 14 for inspection and maintenance, such as... Figure 10As shown, a guide rail plate 37 can be installed on the top of the support frame 1, and a sliding plate 38 that cooperates with the guide rail plate 37 is provided at the bottom of the upright frame 2. The sliding plate 38 can move along the length direction of the guide rail plate 37.

[0025] C-shaped fixing plates 39 are installed on both sides of the sliding plate 38 and the guide rail plate 37 along their length. An upper tightening bolt 40 is installed at the bottom of the C-shaped fixing plate 39. A matching connecting bolt 41 is installed between the upper part of the C-shaped fixing plate 39 and the sliding plate 38. Tightening the upper tightening bolt 40 and the connecting bolt 41 can lock the upright 2 onto the guide rail plate 37. Stops 42 are also provided at both ends of the guide rail plate 37 along its length.

[0026] The stop block 42 is configured to limit the movement of the sliding plate 38 on the guide rail plate 37 at both ends. When the device is in use, the position of the upright 2 on the guide rail plate 37 can be adjusted according to the different specifications of the longitudinal beams. The distance between the wing surface floating side detection laser sensor 8 and the wing surface detection roller 14 is adjusted to the set size. After tightening the top bolt 40 and the connecting bolt 41, the position of the upright 2 and the sensors on it is locked to facilitate subsequent detection operations.

[0027] When it is necessary to inspect and maintain the wing-surface floating side detection laser sensor 8 and increase the distance between the wing-surface floating side detection laser sensor 8 and the wing-surface detection roller 14, the top tightening bolt 40 can be loosened, and the sliding plate 38 can be moved away from the wing-surface detection roller 14 on the guide rail plate 37, so that sufficient space is left between the stand 2 and the sensor on it and the fixed support 13, so that the staff can carry out inspection and maintenance.

[0028] Furthermore, such as Figure 11 As shown, a diagonal brace 43 can also be provided between the guide rail plate 37 and the support frame 1. A base plate 44 is provided at the bottom of the support frame 1, and movable anchor bolts 45 are installed at the four corners of the base plate 44. A reinforcing rib plate 46 is also installed between the base plate 44 and the support frame 1. The design of the diagonal brace 43 and the reinforcing rib plate 46 enhances the structural rigidity of the support frame 1. Combined with the leveling function of the movable anchor bolts 45, the stability of the device during the long-stroke detection process of the longitudinal beam is ensured.

[0029] Furthermore, through multi-sensor collaborative detection, adaptive mechanical structure, and intelligent data processing, this device has constructed an online detection system covering the entire size and process of longitudinal beam punching, providing the automotive manufacturing industry with an efficient, accurate, and reliable punching quality control solution.

[0030] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. An online detection device for punching holes in longitudinal beams, characterized in that: The system includes side-by-side support frames (1), each support frame (1) is equipped with a movable upright (2), and a crossbeam (3) is provided between the tops of the two uprights (2). A reference side cross brace (4) is installed inside one of the uprights (2), and a wing reference side detection laser sensor (5) is installed on the reference side cross brace (4). A floating side cross brace (6) is installed inside the other upright (2), and an electric cylinder (7) is installed on the floating side cross brace (6). A wing floating side detection laser sensor (8) that can move relative to the floating side cross brace (6) is installed on the output shaft of the electric cylinder (7). The wing floating side detection laser sensor (8) and the wing reference side detection laser sensor (5) are arranged correspondingly. Laser generators are installed inside the uprights (2) on both sides. The signal switch (9) is installed at the bottom of the crossbeam (3) with a ventral detection laser sensor (10). The ventral detection laser sensor (10) is located between the wing reference side detection laser sensor (5) and the wing floating side detection laser sensor (8). A vertically movable ventral detection wheel (11) is also installed at the bottom of the crossbeam (3). A ventral length encoder (12) is installed on the shaft of the ventral detection wheel (11). A vertically arranged support (13) is also installed between the two side support frames (1). The support (13) is located on one side of the floating side cross brace (6). A horizontally extendable wing detection roller (14) is installed on the support (13). A wing length encoder (15) is installed on the shaft of the wing detection roller (14).

2. The online detection device for punching holes in longitudinal beams according to claim 1, characterized in that: A guard plate frame (16) is installed on the crossbeam (3). The ventral detection laser sensor (10) is located inside the guard plate frame (16). A lifting cylinder (17) is installed on the guard plate frame (16). A top plate (18) is provided on the piston rod of the lifting cylinder (17). Vertical plates (19) are provided at both ends of the length direction of the top plate (18). A limiting plate (20) is provided on one side of the two vertical plates (19). A pressure plate (21) is provided on the other side of the vertical plates (19). A lifting plate (22) is installed between the limiting plate (20) and the pressure plate (21). A support plate (23) is provided at both ends of the length direction of the lifting plate (22). A rotating shaft (24) is installed between the two support plates (23). The ventral detection wheel (11) is mounted on the rotating shaft (24). A guide post (25) is installed between the lifting plate (22) and the top plate (18). Both the lifting plate (22) and the top plate (18) have through holes through which the guide post (25) can pass. One end of the guide post (25) that passes through the top plate (18) has a protruding edge (26). The diameter of the protruding edge (26) is larger than the diameter of the through hole. One end of the guide post (25) that passes through the lifting plate (22) has a detachable limiting pin (27). A first spring (28) is fitted around the guide post (25) between the lifting plate (22) and the top plate (18). The first spring (28) always tends to keep the lifting plate (22) away from the top plate (18).

3. The online detection device for punching holes in longitudinal beams according to claim 1, characterized in that: A horizontally arranged telescopic cylinder (29) is installed on the support (13). A floating rod (30) is provided at the end of the piston rod of the telescopic cylinder (29). The diameter of the floating rod (30) is smaller than the diameter of the piston rod. A telescopic push plate (31) is installed on the floating rod (30). A through hole is provided on the telescopic push plate (31) to allow the floating rod (30) to pass through. A limit nut (32) is installed at the end of the floating rod (30) that passes through the telescopic push plate (31). The diameter of the limit nut (32) is larger than the diameter of the through hole. A second spring (33) is installed on the outer periphery of the floating rod (30) between the piston rods. The second spring (33) always tends to keep the telescopic push plate (31) away from the piston rod. Two end plates (34) are installed on the side of the telescopic push plate (31) away from the support (13). A wing surface detection roller (14) is installed between the two end plates (34). A guide rod (35) is installed on the side of the telescopic push plate (31) close to the support (13). A guide sleeve (36) that cooperates with the guide rod (35) is provided on the support (13).

4. The online detection device for punching holes in longitudinal beams according to claim 1, characterized in that: The top of the support frame (1) is equipped with a guide rail plate (37), and the bottom of the upright frame (2) is provided with a sliding plate (38) that cooperates with the guide rail plate (37). C-shaped fixing plates (39) are installed on both sides of the sliding plate (38) and the guide rail plate (37) in the length direction. An upper tightening bolt (40) is installed at the bottom of the C-shaped fixing plate (39), and a matching connecting bolt (41) is installed between the upper part of the C-shaped fixing plate (39) and the sliding plate (38). Tightening the upper tightening bolt (40) and the connecting bolt (41) can lock the upright frame (2) on the guide rail plate (37). The two ends of the guide rail plate (37) in the length direction are also provided with stops (42).

5. The online detection device for punching holes in longitudinal beams according to claim 4, characterized in that: A diagonal brace (43) is provided between the guide rail plate (37) and the support frame (1). A base plate (44) is provided at the bottom of the support frame (1). Movable anchor bolts (45) are installed at the four corners of the base plate (44). A reinforcing rib plate (46) is also installed between the base plate (44) and the support frame (1).

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