Frame inspection system

Abstract

The utility model relates to the field of flaw detection provides a kind of framework flaw detection system. Framework flaw detection system includes transport track device, and transport track device includes main transport track and the backflow track separately arranged with main transport track;Multiple carrying trolley, carrying trolley runs along transport track device to bear framework;Rotating disc, rotating disc is set at the intersection of main transport track and backflow track, for realizing the conversion of carrying trolley between main transport track and backflow track;At least one flaw detection station, flaw detection station is along main transport track and is arranged, and includes flaw detection equipment;Framework turnover station, framework turnover station is along main transport track and is arranged;Control device, control device is electrically connected with carrying trolley and rotating disc, for controlling carrying trolley and moving between each station along main transport track, and when receiving flaw detection abnormal signal, control carrying trolley and go to the production line offline point of main transport track end, this carrying trolley enters backflow track return after unloading by rotating disc.

Description

Technical Field

[0001] This utility model relates to the field of flaw detection and provides a frame flaw detection system. Background Technology

[0002] In the rail transit industry, regular maintenance of train frames is a critical task, essential for ensuring safe train operation. The frame is typically constructed from multiple welded components, and the quality of the welds directly impacts the vehicle's safety performance. Traditional inspection processes are cumbersome and complex, primarily involving grinding away the paint covering the welds, manually spraying magnetic suspension fluid, and performing manual flaw detection using a magnetic yoke. Once a problem is found, the weld needs repair, followed by repainting. The entire process is not only labor-intensive but also time-consuming, especially the manual application of paint and magnetic suspension fluid, which increases the complexity and labor costs.

[0003] Traditional inspection methods primarily rely on manual operation, including the spraying of magnetic suspension and the use of magnetic yoke flaw detectors. Due to the significant amount of manual labor and the high technical requirements involved, this method is not only inefficient but also prone to false positives or false negatives. Furthermore, manual paint touch-up often requires two coats, each approximately 8 hours apart, which not only increases the operation time but also prolongs the train's dwell time on the maintenance line, thus impacting train operational efficiency. Utility Model Content

[0004] This utility model provides a frame flaw detection system to achieve automatic flaw detection without paint removal.

[0005] This utility model embodiment provides a frame flaw detection system, including: A transport track device, the transport track device including a main transport track and a return track separately disposed from the main transport track; Multiple transport trolleys run along the transport track device to support the structure; A turntable is provided at the intersection of the main transport track and the return track, and is used to enable the transport trolley to switch between the main transport track and the return track; At least one flaw detection station is provided along the main transport track and includes flaw detection equipment; A frame flipping station is provided along the main transport track; A control device is electrically connected to the transport trolley and the turntable. The control device is used to control the transport trolley to move between each workstation along the main transport track. When a flaw detection abnormality signal is received, the control device is used to control the transport trolley to go to the production line offline point at the end of the main transport track. After unloading, the transport trolley enters the return track via the turntable to return.

[0006] According to one embodiment of the present invention, the flaw detection station is provided with a first flaw detection station and a second flaw detection station in sequence along the main transport track. The frame flipping station is located between the first flaw detection station and the second flaw detection station.

[0007] According to one embodiment of the present invention, the frame flipping machine includes a flipping arm capable of clamping the frame and rotating it 180 degrees around a horizontal axis, so that after the transport trolley carries the frame to complete the reverse flaw detection, it can flip the frame through the frame flipping station so that the frame faces upward and enters the second flaw detection station for front flaw detection.

[0008] According to one embodiment of the present invention, a frame welding repair operation area is also provided outside the main transport track; The production line off-line point is located at the end of the main transport track and adjacent to the frame welding repair work area, so as to unload the frame with flaw detection abnormalities from the transport trolley and transfer it to the frame welding repair work area.

[0009] According to one embodiment of the present invention, a branch track is provided on the return track, and the branch track is provided with a frame re-entry station; The control device can schedule an empty transport trolley running along the return track to enter the frame re-entry station via the branch track to take over the frame after maintenance.

[0010] According to one embodiment of the present invention, the return track constitutes a return path for the unloaded transport trolley, and the end point of the return path is connected to the beginning of the main transport track to form a closed-loop transport circuit.

[0011] According to one embodiment of the present invention, the transport vehicle includes a track-type automated guided vehicle.

[0012] According to one embodiment of the present invention, the control device includes a central processing unit and a memory electrically connected to the drive components of the transport trolley, the flaw detection equipment, the frame tilting machine and the turntable; The memory stores control instructions, and the central processing unit executes the control instructions to coordinate the control of the transport trolley, the flaw detection equipment, the frame tilting machine, and the turntable.

[0013] According to one embodiment of the present invention, the flaw detection equipment includes an eddy current flaw detection device, the probe of which is adapted to perform non-destructive testing of welds without removing the paint from the frame surface.

[0014] According to one embodiment of the present invention, the flaw detection device is further configured to send its detection result signal to the control device, and the control device controls the target path of the transport vehicle based on the detection result signal. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic layout diagram of the frame flaw detection system provided by this utility model.

[0017] Figure 2 This is a schematic layout diagram of the flaw detection area provided by this utility model.

[0018] Figure label: 100. Main transport track; 102. Return track; 104. Turntable; 106. Transport trolley; 108. Flaw detection equipment; 110. Frame turnover machine; 112. First flaw detection station; 114. Second flaw detection station; 116. Production line offline point; 118. Frame re-line station. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] like Figures 1 to 2 As shown, this utility model embodiment provides a frame flaw detection system, including: The transport track device includes a main transport track 100 and a return track 102 that is separately arranged from the main transport track 100; Multiple transport trolleys 106 run along the transport track device to support the structure; Turntable 104 is located at the intersection of main transport track 100 and return track 102, and is used to realize the conversion of transport trolley 106 between main transport track 100 and return track 102; At least one flaw detection station is provided along the main transport track 100 and includes flaw detection equipment 108; A frame tilting station is set up along the main transport track 100. The control device is electrically connected to the transport trolley 106 and the turntable 104. It is used to control the transport trolley 106 to move between each workstation along the main transport track 100. When a flaw detection abnormality signal is received, the control device will control the transport trolley 106 to move to the production line offline point 116 at the end of the main transport track 100. After unloading, the transport trolley 106 will enter the return track 102 via the turntable 104 to return.

[0021] According to the structural flaw detection system provided in this embodiment, the main transport track 100 and the return track 102 are set separately, allowing the trolley carrying the structural frame and the empty return trolley to travel on their own paths, completely avoiding the congestion problem caused by the traditional single-track back-and-forth movement. The main transport track 100 focuses on the structural flaw detection flow, while the return track 102 focuses on trolley reuse. The two are efficiently connected by a turntable 104, ensuring that the travel path of each trolley is unobstructed. The production line can continuously process multiple structural frames, significantly improving the overall work cycle. The turntable 104 realizes the automatic conversion of the transport trolley 106 between the main transport track 100 and the return track 102, eliminating the need for manual handling or pushing the trolley to adjust the track, thus reducing labor intensity and shortening the idle time of the trolley. The structural frame flipping machine 110 can automatically complete a 180-degree flip, eliminating the need for multiple people to cooperate in handling and flipping. This avoids the collision damage to the structural frame caused by manual flipping, reduces manual operation time, and ensures that the position of the structural frame after flipping is accurate, adapting to the flaw detection needs of the next workstation. When the transport trolley 106 travels along the track, it stops with minimal error through track position markers and positioning sensors. The flaw detection equipment 108 probe can accurately align with the weld, avoiding missed or false detections due to positional deviations.

[0022] Please continue reading Figures 1 to 2 The structural flaw detection system provided in this embodiment of the utility model achieves fully automated flaw detection and flexible anomaly handling throughout the entire structural process through the separate track flow and the coordinated setting of automated equipment.

[0023] Extending along the flaw detection process path of the frame, the overall layout is a straight line or a gentle curve, used to carry the transport trolley 106 and the frame to complete the flaw detection operation. The extension direction of the main transport track 100 is consistent with the layout direction of each workstation, and the track surface is equipped with position marks to provide a precise positioning reference for the transport trolley 106; the width of the track is adapted to the wheels of the transport trolley 106 to ensure that the trolley travels smoothly without deviation.

[0024] The return track 102 is set parallel to or offset from the main transport track 100 and is only used for the empty transport trolley 106 to return to the starting point. The starting end of the return track 102 is connected to the end of the main transport track 100 through a turntable 104, and the ending end is connected to the starting end of the main transport track 100, forming an independent path for the structure to flow and the trolley to return, which does not intersect with the load-bearing structure trolley on the main transport track 100.

[0025] The transport vehicle 106 includes a metal body, wheels adapted to the track, a frame fixing clamp, and a drive module. The metal body has sufficient mechanical strength to stably support the weight of the frame; the wheel surface has anti-slip textures to closely fit the rail surfaces of the main transport track 100 and the return track 102, preventing slippage during travel; the frame fixing clamp is located on the top of the vehicle body and is an openable mechanical gripper with flexible material wrapped inside, which can both clamp the frame to prevent shaking and avoid damage to the frame surface; the drive module is electrically connected to the control device and can adjust the travel speed and direction according to instructions.

[0026] During normal operation, the transport trolley 106 travels along the main transport track 100 and stops at each workstation in sequence to complete the frame flaw detection and flipping. When the frame is found to be abnormal, the transport trolley 106 travels along the branch path at the end of the main transport track 100 to the production line offline point 116 under the command of the control device. After unloading the frame, the transport trolley 106 travels along the preset path to the turntable 104, and after the turntable 104 changes tracks, it enters the return track 102 and finally returns to the online point to wait for a new frame.

[0027] The turntable 104 is a circular rotatable platform. The surface of the platform is provided with connecting rails that are compatible with the main transport rail 100 and the return rail 102. A drive motor is provided under the platform, which can drive the platform to rotate around the vertical axis.

[0028] When the empty transport trolley 106 travels from the main transport track 100 to the turntable 104 platform, the control device commands the drive motor to start, and the turntable 104 rotates until the connecting track aligns with the return track 102. After confirming alignment, the control device commands the transport trolley 106 to move along the connecting track into the return track 102. If it is necessary to move the empty trolley on the return track 102 to the main transport track 100, the turntable 104 rotates in the opposite direction to align the connecting track with the main transport track 100, and the trolley moves into the main transport track 100. The entire conversion process requires no manual intervention, has a short conversion time, and does not affect the trolley's turnover efficiency.

[0029] The flaw detection station is equipped with a fixed support, on which the flaw detection equipment 108 is installed. The probe of the equipment is fixed by a robotic arm, which can move along a preset trajectory. Positioning sensors are installed around the station to detect whether the transport trolley 106 is parked in place, ensuring that the probe can be accurately aligned with the weld seam of the structure.

[0030] After the carrier trolley 106 stops at the flaw detection station, the positioning sensor sends a position signal to the control device, and the control device instructs the flaw detection equipment 108 to start. The probe of the eddy current flaw detection equipment 108 moves along the weld seam of the frame under the drive of the robotic arm, and can penetrate the paint on the surface of the frame without removing it. During the detection process, the flaw detection equipment 108 transmits the real-time detection signal to the control device. If the detection is normal, the trolley moves to the next station; if the detection is abnormal, the control device immediately triggers the abnormal handling procedure.

[0031] The frame turning station is arranged along the main transport track 100, and a frame turning machine 110 is installed on the station. The turning machine includes two symmetrically arranged turning arms, clamping pads, and a drive motor. The turning arms are long strip-shaped metal arms that can open and close towards the frame; the clamping pads are made of flexible material and are fixed to the inside of the turning arms, adapting to the side contour of the frame; the drive motor can drive the turning arms to rotate around the horizontal axis, and the rotation angle is precisely controlled to 180 degrees.

[0032] After the trolley 106, carrying the frame that has completed single-sided flaw detection, stops at the flipping station, the control device commands the flipping arm to close towards the frame, and the clamping pad tightly adheres to and clamps the side of the frame; then, driven by the drive motor, the flipping arm rotates 180 degrees around the horizontal axis, turning the frame from the back to the front; after the flipping is completed, the flipping arm opens and closes in the opposite direction, releasing the frame and placing it back into the trolley 106; the control device commands the trolley to leave the flipping station and proceed to the next flaw detection station to complete the front flaw detection.

[0033] According to the production line rhythm, the control device instructs the transport trolley 106 to move along the main transport track 100, and sequentially complete the process of loading the support frame at the production line point, the first flaw detection station 112, the frame flipping station, the second flaw detection station 114, and unloading at the next process. The actions of each piece of equipment are connected through signal interaction.

[0034] According to one embodiment of the present invention, a first flaw detection station 112 and a second flaw detection station 114 are sequentially arranged along the main transport track 100. The frame flipping station is located between the first flaw detection station 112 and the second flaw detection station 114.

[0035] In one embodiment of this utility model, along the extension direction of the main transport track 100, a first flaw detection station 112, a frame flipping station, and a second flaw detection station 114 are sequentially arranged. The three stations are distributed in a straight line along the track, and the spacing is adapted to the driving and positioning accuracy of the transport trolley 106 to ensure that the trolley can accurately stop at each station.

[0036] The first flaw detection station 112 is used to install the eddy current flaw detection equipment 108. The equipment probe faces the opposite side of the support frame of the transport trolley 106. When the trolley stops, the probe automatically moves along the weld track on the opposite side of the frame to complete the inspection of the weld on the opposite side. The frame flipping station is located between the first flaw detection station 112 and the second flaw detection station 114. The position of the flipping machine is aligned with the main transport track 100. After the trolley stops carrying the frame that has completed the reverse flaw detection, the flipping arm of the flipping machine clamps the frame, lifts it and rotates it around the horizontal axis. After the frame is facing up, the frame is lowered to the trolley and the trolley exits the flipping station. The second flaw detection station 114 is used to install the eddy current flaw detection equipment 108. The probe faces the front of the frame. After the trolley carrying the overturned frame stops, the probe automatically moves along the front weld track to complete the front weld inspection.

[0037] By employing a process of first inspecting the reverse side, then flipping it over, and finally inspecting the front side, the system ensures that welds on both sides of the frame can be inspected, covering all critical areas, reducing the risk of missed inspections, and improving the reliability of flaw detection. Each workstation is arranged sequentially along the main transport track 100, allowing the transport trolley 106 to complete multiple processes without detours. Furthermore, the control device coordinates the actions of each workstation in real time, avoiding trolley waiting or workstation idleness. Compared to a dispersed production line, the flaw detection time for a single frame is significantly reduced.

[0038] According to one embodiment of the present invention, the frame flipping machine 110 includes a flipping arm that can clamp the frame and rotate it 180 degrees around the horizontal axis, so that after the carrier trolley 106 has completed the reverse flaw detection of the frame, it can flip the frame through the frame flipping station so that the frame can enter the second flaw detection station 114 with the front side facing up for front flaw detection.

[0039] In one embodiment of this utility model, the frame flipping machine 110 includes flipping arms, a drive motor, and clamping pads. The flipping arms are two symmetrically arranged elongated arms, one end of which is connected to the output shaft of the drive motor, and the other end can open and close towards the frame. The clamping pads are made of flexible material and are fixed to the inner side of the flipping arms. Their shape is adapted to the side profile of the frame and can fit tightly against the frame surface. The drive motor can drive the flipping arms to rotate around a horizontal axis. The rotation angle can be precisely controlled by the production line control device to ensure that the rotation angle is 180 degrees each time.

[0040] The transport trolley 106 carries the frame that has completed the reverse flaw detection, travels along the main transport track 100 to the frame flipping station and stops precisely, so that the frame is located between the two flipping arms. The production line control device commands the tilting arm to close towards the frame, the clamping pad to fit the side of the frame and apply a preset pressure to stabilize the frame; The drive motor starts, causing the tilting arm to rotate around the horizontal axis. When it rotates to 180 degrees, the motor stops, and the frame changes from facing up to facing up. The tilting arm opens and closes in the reverse direction, releasing the frame. The transport trolley 106 starts and drives out of the tilting station to the second flaw detection station 114; the tilting arm resets and waits for the next tilting operation.

[0041] The tilting arm is equipped with a position sensor that can detect the clamping status of the frame in real time. If the clamping is not stable, it will send a signal to the production line control device to control the motor to stop rotating and prevent the frame from falling off during the tilting process. At the same time, there are guardrails around the tilting station to prevent personnel from accidentally entering and causing safety accidents.

[0042] The flipping arm rotates around the horizontal axis, and the rotation angle is precisely controlled at 180 degrees to ensure that the front of the frame can be accurately aligned with the probe of the second flaw detection station 114 after the frame is flipped. This avoids the probe not being able to cover the weld due to the deviation of the flipping angle, thus ensuring the accuracy of the front flaw detection. The flexible material and fit design of the clamping pad not only avoids clamping damage to the frame surface, but also prevents the frame from sliding during flipping, further improving the positional accuracy during flaw detection.

[0043] According to one embodiment of the present invention, it also includes a frame welding repair operation area located outside the main transport track 100; The production line off-line point 116 is located at the end of the main transport track 100 and adjacent to the frame welding repair operation area, so as to unload the frame with flaw detection abnormalities from the transport trolley 106 and transfer it to the frame welding repair operation area.

[0044] In one embodiment of this utility model, the frame welding repair work area is set in an area outside the main transport track 100. The work area is equipped with welding repair tools, tooling fixtures and auxiliary equipment, which can be used to weld and repair frames with abnormal flaw detection.

[0045] The production line decommissioning point 116 is located at the end of the main transport track 100 and adjacent to the frame welding repair work area. The decommissioning point is equipped with a liftable unloading platform, the height of which is adapted to the bearing surface of the transport trolley 106. When the flaw detection equipment 108 detects an abnormality in the frame, the production line control device dispatches the corresponding transport trolley 106 to the decommissioning point along the main transport track 100. After the trolley stops, the unloading platform rises and supports the frame, the trolley's clamps release, and the frame is transferred to the platform. Subsequently, the abnormal frame on the platform can be directly transferred to the adjacent welding repair work area manually or by overhead crane, eliminating the need for long-distance transport.

[0046] After unloading the frame, the empty trolley 106 travels along the branch track at the end of the main transport track 100 to the turntable 104. After turning at the turntable 104, it enters the return track 102 and finally returns to the preset start point to wait for a new frame or a frame that has been repaired, forming a closed-loop process of abnormal handling and trolley reuse.

[0047] The unloading point is adjacent to the welding repair area. The distance from unloading to transfer of the abnormal frame to the welding repair area is short, eliminating the need for long-distance transportation equipment, reducing transfer time, and preventing the abnormal frame from occupying the main transport track or storage space, thus ensuring the normal operation of the main production line. Traditionally, abnormal frames need to be manually carried to the distant welding repair area, which is prone to secondary damage due to improper handling. This design reduces manual labor intensity through short-distance transfer, with the assistance of overhead cranes or platforms, while also reducing collisions and friction during the transfer process, protecting the surface and structural integrity of the frame.

[0048] According to one embodiment of the present invention, a branch track is provided on the return track 102, and the branch track is provided with a frame re-entry station 118; The control device can schedule the empty transport trolley 106 running along the return track 102 to enter the frame re-line station 118 via the branch track to take over the frame that has been repaired.

[0049] In one embodiment of this utility model, the return track 102 is the return path of the empty transport trolley 106. Along the extension direction of the return track 102, a branch track is provided, which is connected to the return track 102 in a "Y" shape. A switchable track steering device is provided at the connection point. At the end of the branch track, a frame re-entry station 118 is provided. This station is equipped with a positioning platform adapted to the transport trolley 106, on which the repaired frame can be placed.

[0050] After the frame is repaired in the welding repair work area, the repaired frame is transferred manually or by overhead crane to the positioning platform of the frame re-line work station 118. The platform positions the frame to ensure that it is aligned with the clamp position of the transport trolley 106. When the production line control device detects that there is a waiting structure at the re-entry station, it dispatches the empty transport trolley 106 traveling along the return track 102, instructs the track steering device to switch to the branch track direction, and the trolley travels along the branch track to the re-entry station and stops precisely. The positioning platform rises and transfers the maintenance frame to the clamp of the trolley, which closes to fix the frame. The production line control device instructs the trolley to return to the return track 102 along the branch track, and then travel along the return track 102 to the preset online point. After that, the trolley enters the main transport track 100 and carries the maintenance frame to perform flaw detection again.

[0051] Repaired frames do not need to be re-queued at the beginning of the production line. They can be directly connected to the return trolley via the branch track and quickly enter the main production line, reducing frame idle time, improving frame utilization, and reducing cost losses caused by frame scrapping. The branch track is independent of the main return track 102. When an empty trolley goes to the re-entry station, it does not need to occupy the passage space of the main return track 102, avoiding affecting the normal return of other empty trolleys to the line, and improving the scheduling flexibility and efficiency of the overall transportation device.

[0052] According to one embodiment of the present invention, the return track 102 constitutes a return path for an empty transport trolley 106, and the end point of the return path is connected to the beginning of the main transport track 100 to form a closed-loop transport circuit.

[0053] In one embodiment of this utility model, the main transport track 100 is the main flow path for frame flaw detection. Along the track, the upper line point, the first flaw detection station 112, the frame flipping station, the second flaw detection station 114, and the lower line point are arranged in sequence. The return track 102 is the return path for the empty transport trolley 106. One end of the track is connected to the beginning of the main transport track 100 through a turntable 104, and the other end is connected to the end of the main transport track 100 through a turntable 104, forming a closed-loop transport circuit in which the main transport track 100 carries the frame flow and the return track 102 carries the trolley back.

[0054] The closed-loop system allows a limited number of transport trolleys 106 to continuously participate in the structure's flow without the need for additional spare trolleys. Compared to open tracks, this significantly reduces the number of trolleys required, lowering equipment procurement and maintenance costs. The main transport track 100 and return track 102 are separate, with trolleys carrying the structure and empty return trolleys traveling on their own paths, preventing intersections and congestion. This ensures smooth travel for each trolley, reduces waiting time, and improves the overall efficiency of the production line.

[0055] According to one embodiment of the present invention, the transport vehicle 106 includes a track-type automated guided vehicle.

[0056] In one embodiment of this utility model, the transport trolley 106 includes a vehicle body, a drive module, a positioning module, a clamping module, and a communication module: the vehicle body is a metal frame structure with sufficient strength to bear the weight of the frame; the drive module includes a motor and wheels, the wheels are adapted to a preset track, and can drive the trolley to travel along the track; the positioning module includes a laser sensor or a vision sensor, which can read the position marks on the track to achieve precise parking of the trolley; the clamping module is an openable mechanical clamp, set on the top of the vehicle body, with a flexible pad on the inner side of the clamping claw, which can stably clamp the frame without damaging the surface of the frame; the communication module is wirelessly connected to the production line control device, and can receive scheduling instructions and provide feedback on the status of the trolley in real time.

[0057] The positioning module of the track-guided vehicle can achieve docking with minimal error, ensuring that the frame can be accurately aligned with the probe of the flaw detection equipment 108. This avoids the probe failing to cover the weld due to the vehicle's docking deviation, thus improving the accuracy of flaw detection and reducing false or missed detections.

[0058] According to one embodiment of the present invention, the control device includes a central processing unit and a memory electrically connected to the drive components of the transport trolley 106, the flaw detection equipment 108, the frame tilting machine 110 and the turntable 104. The memory stores control instructions, and the central processing unit executes the control instructions to coordinate the control of the transport trolley 106, the flaw detection equipment 108, the frame tilting machine 110, and the turntable 104.

[0059] In one embodiment of this utility model, the production line control device includes a central processing unit and a memory. The central processing unit is a chip with multi-threaded processing capability, and the memory is hardware that can store data and instructions. The central processing unit establishes an electrical connection with the drive components of the transport trolley 106, the flaw detection equipment 108, the frame tilting machine 110, and the turntable 104 through wires or wireless communication modules. It can send control commands to each device and receive status signals fed back by each device.

[0060] The control instructions and cooperative logic memory stores preset control instructions, including: Flow instructions: According to the production line rhythm, the transport trolley 106 is scheduled to travel in the order of the line entry point, the first flaw detection station 112, the flipping station, the second flaw detection station 114, and the next process / line exit point, and each station equipment is instructed to prepare for operation according to the arrival time of the trolley. Abnormal handling instructions: When a structural abnormality signal is received from the flaw detection equipment 108, the corresponding trolley is immediately instructed to deviate from the main transport track 100 and proceed to the drop-off point, and the turntable 104 is simultaneously instructed to prepare to receive the empty trolley. Equipment coordination instructions: When the trolley stops at the flipping station, the flipping machine is instructed to first clamp the frame and then rotate it. After the flipping is completed, the trolley is instructed to drive out. When the trolley enters the re-entry station, the track steering device is instructed to switch to the branch track.

[0061] The central processing unit can process the signals fed back by various devices in real time, such as storing the detection results of the flaw detection device 108 into the memory and generating a flaw detection report; if a device malfunctions, it will immediately send an alarm signal to the control console and instruct the relevant devices to stop operating to prevent the fault from escalating.

[0062] The central processing unit uniformly schedules all equipment to ensure that actions such as trolley movement, flaw detection equipment 108 inspection, and tilting machine tilting are coordinated in an orderly manner, preventing conflicts such as the flaw detection equipment 108 starting before the trolley is in position or the trolley moving before the tilting machine is released, thus ensuring stable operation of the production line and reducing the risk of equipment damage.

[0063] According to one embodiment of the present invention, the flaw detection device 108 includes an eddy current flaw detection device 108, the probe of which is adapted to perform non-destructive testing of welds without removing the paint from the surface of the frame.

[0064] In one embodiment of this utility model, the eddy current flaw detection device 108 includes a probe, a drive mechanism, and a signal processing module: the probe has a flat structure and an internal coil. When the coil is energized, it can generate an alternating magnetic field. When the probe approaches the weld of the frame, the magnetic field will induce eddy currents in the weld; the drive mechanism is a movable robotic arm, and the probe is fixed to the end of the robotic arm. The robotic arm can drive the probe to move along a preset trajectory, and the moving speed is adapted to the flaw detection accuracy; the signal processing module is electrically connected to the probe, and can receive the eddy current signal induced by the probe and convert the signal into analyzable detection data.

[0065] The eddy current testing equipment 108, which enables non-paint-removal testing, does not require the probe to directly contact the frame surface. The alternating magnetic field can penetrate the paint layer on the frame surface and induce eddy currents in the weld. If there are cracks or defects in the weld, it will cause abnormal eddy current distribution. The probe can capture the abnormal signal. The signal processing module analyzes the signal difference to determine whether there is an abnormality in the weld. The entire testing process does not require grinding to remove the paint.

[0066] Traditional manual flaw detection requires a significant amount of time to grind and remove paint from weld seams, and repainting is necessary afterward. This eddy current testing equipment 108 can directly penetrate paint for inspection, eliminating these steps and significantly improving production line efficiency. Manual grinding and paint removal easily leads to scratches on the frame surface and large-area damage to the paint layer, affecting the frame's corrosion resistance. Eddy current testing eliminates the need for contact grinding, preserving the paint layer intact, extending the frame's service life, and reducing subsequent maintenance costs.

[0067] According to one embodiment of the present invention, the flaw detection device 108 is also used to send its detection result signal to the control device, and the control device controls the target path of the transport vehicle 106 based on the detection result signal.

[0068] In one embodiment of this utility model, after the flaw detection equipment 108 completes the frame detection, the signal processing module immediately generates a detection result signal. This signal is transmitted to the central processing unit of the production line control device via a wire or wireless communication module. After receiving the signal, the central processing unit calls the path control instructions stored in the memory and determines the target path of the transport trolley 106 based on the detection result. If the test result is qualified, the central processing unit sends an instruction to the corresponding transport trolley 106 to proceed to the next process, instructing the trolley to travel along the main transport track 100 to the unloading point of the next process; If the detection result is abnormal, the central processing unit sends a command to the trolley to go to the production line drop-off point 116. At the same time, it commands the branch track at the end of the main transport track 100 to open, guiding the trolley to deviate from the main track and drive to the drop-off point.

[0069] The detection result signal is transmitted to the control device in real time. The trolley can immediately switch paths according to the result. Qualified frames directly enter the next process, while abnormal frames are quickly removed from the line, avoiding the continued circulation of abnormal frames on the main production line, reducing ineffective operations, and improving the overall efficiency of the production line.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A frame flaw detection system, characterized in that, include: A transport track device, the transport track device including a main transport track (100) and a return track (102) separately disposed from the main transport track (100); Multiple transport trolleys (106) run along the transport track device to support the frame; A turntable (104) is provided at the intersection of the main transport track (100) and the return track (102) to enable the transport trolley (106) to switch between the main transport track (100) and the return track (102); At least one flaw detection station is provided along the main transport track (100) and includes a flaw detection device (108). A frame flipping station is provided along the main transport track (100); The control device is electrically connected to the transport trolley (106) and the turntable (104) and is used to control the transport trolley (106) to move between each workstation along the main transport track (100). When a flaw detection abnormality signal is received, the control device controls the transport trolley (106) to travel to the production line offline point (116) at the end of the main transport track (100). After unloading, the transport trolley (106) enters the return track (102) via the turntable (104) to return.

2. The frame flaw detection system according to claim 1, characterized in that, The flaw detection station is provided with a first flaw detection station (112) and a second flaw detection station (114) in sequence along the main transport track (100). The frame flipping station is located between the first flaw detection station (112) and the second flaw detection station (114).

3. The frame flaw detection system according to claim 2, characterized in that, The frame flipping machine (110) includes a flipping arm that can clamp the frame and rotate it 180 degrees around a horizontal axis, so that after the transport trolley (106) carries the frame to complete the reverse flaw detection, it can flip the frame through the frame flipping station so that the frame faces upward and enters the second flaw detection station (114) for front flaw detection.

4. The frame flaw detection system according to claim 2, characterized in that, It also includes a frame welding repair work area located outside the main transport track (100); The production line off-line point (116) is located at the end of the main transport track (100) and adjacent to the frame welding repair operation area, so as to unload the frame with flaw detection abnormalities from the transport trolley (106) and transfer it to the frame welding repair operation area.

5. The frame flaw detection system according to claim 4, characterized in that, A branch track is provided on the return track (102), and the branch track is provided with a frame re-entry station (118). The control device can schedule an empty transport trolley (106) running along the return track (102) to enter the frame re-upline station (118) via the branch track to take over the frame that has been repaired.

6. The frame flaw detection system according to claim 1, characterized in that, The return track (102) forms a return path for the unloaded transport vehicle (106), and the end of the return path is connected to the beginning of the main transport track (100) to form a closed-loop transport circuit.

7. The frame flaw detection system according to any one of claims 1 to 6, characterized in that, The transport vehicle (106) includes a track-mounted automated guided vehicle.

8. The frame flaw detection system according to any one of claims 1 to 6, characterized in that, The control device includes a central processing unit and a memory electrically connected to the drive components of the transport trolley (106), the flaw detection equipment (108), the frame tilting machine (110), and the turntable (104); The memory stores control instructions, and the central processing unit executes the control instructions to coordinate the control of the transport trolley (106), the flaw detection equipment (108), the frame tilting machine (110), and the turntable (104).

9. The frame flaw detection system according to any one of claims 1 to 6, characterized in that, The flaw detection equipment (108) includes an eddy current flaw detection device (108), the probe of which is adapted to perform non-destructive testing of welds without removing the paint from the frame surface.

10. The frame flaw detection system according to any one of claims 1 to 6, characterized in that, The flaw detection device (108) is also used to send its detection result signal to the control device, which controls the target path of the transport vehicle (106) based on the detection result signal.

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