Motor train unit wheel set intelligent maintenance production line and operation method thereof

Abstract

The invention relates to the field of motor train unit wheel set overhaul production lines, and discloses a motor train unit wheel set intelligent overhaul production line which comprises a centralized control module. The shaft number recognition and input module, the automatic conveying module, the automatic steering module, the brake disc turning repair module, the wheel set turning module, the shaft end plugging and dismounting module, the magnetic powder flaw detection module and the hollow shaft flaw detection module are connected with the centralized control module; the invention further discloses an operation method for the intelligent overhaul production line for the motor train unit wheel sets, and the operation method comprises seven operation steps and has the advantages of being intelligent, high in automation degree and good in machining consistency.

Description

Technical Field

[0001] The present invention relates to the field of EMU (Electric Multiple Unit) wheel-set maintenance production lines, and discloses an intelligent EMU wheel-set maintenance production line and an operation method thereof. Background Art

[0002] As the core load-bearing component of rail transit equipment, the wheel-set undertakes the severe challenges of multiple dynamic function couplings. In a complex and changeable operating environment, the wheel-set needs to synchronously achieve the load-bearing of hundreds of tons, the transmission of traction and braking torques, and the dynamic matching of wheel-rail. During its service process, it is accompanied by high-frequency thermal-mechanical coupling effects, which are extremely prone to induce complex faults such as tread fatigue damage and geometric out-of-roundness. The existing maintenance mode relies on a large amount of manual intervention, and there are significant technical bottlenecks: in the manual transfer link, the six-degree-of-freedom pose adjustment of ton-level components needs to be completed, and the operation accuracy is significantly affected by physiological limitations; the multi-process maintenance process relies on visual observation and mechanical operation, and it is difficult to achieve micron-level parameter control and multi-physical field monitoring; the paper record system leads to data isolation, and it is difficult to construct a full-life-cycle quality traceability chain.

[0003] With the development of rail transit towards high-speed and heavy-haul directions, the operating mileage and load of locomotives and vehicles increase, the inventory of various types of locomotives and vehicles gradually grows, and the wheel-set maintenance workload of each rail transit maintenance plant section also increases accordingly. The wheel-set maintenance technology faces multi-dimensional upgrading requirements. The traditional manual operation mode has been difficult to meet the requirements of high-frequency maintenance operations and refined quality control, and it is urgent to transform the production line through intelligent technologies. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in the background art and propose an intelligent EMU wheel-set maintenance production line and an operation method thereof, including a centralized control module, an axle number identification and input module, an automatic conveying module, an automatic steering module, a brake disc turning module, a wheel-set turning module, an axle-end plugging and unplugging module, a magnetic particle flaw detection module, and a hollow axle flaw detection module connected to the centralized control module; The centralized control module is connected to the wheel-set maintenance information system; The axle number identification and input module identifies and inputs the axle number of the wheel-set to be maintained; The automatic conveying module is used to transport the wheel-sets to be maintained and those that have been maintained; The brake disc turning module is connected to the automatic steering module and is used for turning the wheel load brake disc and the disc surface of the wheel-set; The wheel-set turning module is connected to the automatic conveying module and is used for turning the tread of the wheel-set; The axle-end plugging and unplugging module is connected to the automatic conveying module and is used for plugging the axle end of the wheel-set; The magnetic particle flaw detection module is used for magnetic particle flaw detection inspection of the wheel-set and for fluorescent magnetic particle flaw detection of the wheel-set; The hollow axle flaw detection module is connected to the automatic conveying module and is used for flaw detection of the hollow axle of the wheel set.

[0005] Further, the centralized control module includes a centralized control operation station, an industrial control host computer, a display, and a printer connected to the industrial control host computer. The industrial control host computer is equipped with intelligent maintenance information software, which can realize the synchronous management of various maintenance functions of the intelligent maintenance production line according to the data issued by the wheel set maintenance information system and the data fed back by the intelligent maintenance production line. At the same time, it can monitor the processing status of each process during the maintenance process, automatically generate the status information of each device and the wheel set maintenance report form, and upload them to the wheel set maintenance information system.

[0006] Further, the axle number identification and input module consists of a wheel set axle number identification system and a wheel set identity label mounting system. The wheel set axle number identification system can automatically identify and judge the wheel set axle number, and automatically upload the identification information to the centralized control module after remote verification by personnel; after the identification information is uploaded, the wheel set identity label mounting system will automatically generate an identity label and mount it on the target wheel set.

[0007] Further, the automatic conveying module consists of a conveying line and a nylon protection backing plate; the conveying line is connected to various maintenance modules on the intelligent production line through track laying.

[0008] Further, the automatic steering module consists of a wheel connecting and pulling device and a turntable; the wheel connecting and pulling device can stop the target wheel set at the geometric center of the turntable, and the turntable drives the wheel set to rotate to a specified angle. After the turntable rotates in place, the wheel connecting and pulling device pulls the wheel set onto the required track.

[0009] Further, the brake disc turning and milling module consists of a wheel connecting and pulling device and a brake disc lathe; the wheel connecting and pulling device can fix the wheel set transported to the center of the brake disc lathe. The brake disc lathe can accept the instructions issued by the centralized control module to turn and mill the wheel hub brake disc and the surface part of the wheel hub brake disc of the target wheel set, and return the processing information to the centralized control module after processing. The wheel connecting and pulling device rolls the wheel set out of the machine tool.

[0010] Further, the wheel set turning module includes a numerically controlled wheel lathe; the numerically controlled wheel lathe adopts a gantry frame structure and is located on the track of the automatic conveying module, so that the wheel set can roll in and out smoothly, and can complete the turning of the target wheel set according to the data issued by the centralized control module, and automatically upload the equipment status and the wheel set turning processing information.

[0011] Further, the axle end plugging and disassembling module includes a V-shaped positioning track, a mechanical claw, and a digital Gauss meter; the V-shaped positioning track is spliced with the track of the automatic conveying module. When the wheel set is pushed to the V-shaped groove of the V-shaped positioning track, its displacement is limited and it is fixed. The mechanical claw grabs and installs the axle end plug, and the digital Gauss meter performs residual magnetic detection.

[0012] Furthermore, the magnetic particle flaw detection module consists of a fluorescent magnetic particle flaw detector, a darkroom, and an industrial control computer. The darkroom is composed of an aluminum alloy framework. The fluorescent magnetic particle flaw detector is installed on the central axis of the track of the automatic conveying module in the darkroom, and the loading and unloading of the wheelset are carried out by using a special pneumatic and chain transmission method. The industrial control computer controls the liquid crystal display screen to display the real-time acquisition and monitoring of the magnetization parameters of the flaw detector, outputs, prints, and stores the daily, quarterly inspection records and flaw detection results of the flaw detector in the form of a report, and can perform functions such as playback, query, analysis, and statistics.

[0013] Furthermore, the hollow shaft flaw detection module includes a hollow shaft flaw detector, an automatic sliding table mechanism, a supporting wheel positioning device, a connecting and picking wheel device, a cleaning device, and an oil spraying device. The supporting wheel positioning device and the connecting and picking wheel device are installed at the pre-cleaning station, flaw detection station, coupling agent cleaning station, and oil spraying station on the maintenance line. The cleaning device automatically cleans the hollow part of the hollow shaft of the wheelset, and the oil spraying device automatically sprays anti-rust oil on the hollow part of the hollow shaft. The automatic sliding table mechanism can drive the flaw detection feeding mechanism to perform high-precision linear motion in the X and Y axes and rotate 90 degrees around the Z axis to complete the flaw detection of the hollow shaft.

[0014] An operation method for an intelligent maintenance production line of a multiple unit wheelset includes the following steps: Step S1: According to the operation plan arrangement of the wheelset maintenance information system, the centralized control module issues a task to the automatic conveying module to convey the wheelset to be maintained to the axle number identification and input module. The axle number identification system identifies and judges the axle number, and uploads the information after manual review to the centralized control module. At the same time, the wheelset identity label mounting system generates a unique identity label for the wheelset and mounts it on the wheelset.

[0015] Step S2: The wheelset with the identity label mounted is conveyed to the automatic steering module in front of the brake disc turning module. After the connecting and picking wheel device receives the wheelset, the turntable drives the wheelset to rotate until the center line of the wheelset coincides with the center line of the brake disc turning module, and the connecting and picking wheel device pulls out the wheelset and pushes it into the brake disc turning module and fixes it on the track of the automatic conveying device.

[0016] Step S3: The automatic conveying device in the brake disc turning module stops the incoming wheelset at the center of the machine tool. The brake disc lathe completes the turning of the brake disc of the wheelset according to the data of the centralized control module and uploads the machining data of the wheelset to the centralized control module. The turned wheelset rolls out of the machine tool by the automatic conveying device, and the connecting and picking wheel device receives it and pulls it back to the automatic conveying module.

[0017] Step S4: The wheelset that has completed the brake disc turning is conveyed to the center of the CNC wheel lathe in the wheelset turning module by the automatic conveying module. After the wheel lathe automatically sets the tool, it performs automatic turning processing. The centralized control module receives the feedback information after processing and issues an instruction to let the automatic conveying module convey the wheelset to the next process station.

[0018] Step S5: The wheel set arrives at the axle end plug disassembly and assembly module. The V-shaped positioning track holds the wheel set at a fixed work station. The detection device automatically detects the axle neck height to determine the relative position of the axle, and the mechanical claw grabs and installs the axle end plug.

[0019] Step S6: After the axle end plug is installed, the wheel set will be transported to the magnetic particle flaw detection module. The dedicated pneumatic and chain conveying method places the wheel set on the fluorescent magnetic particle flaw detector. The industrial control computer automatically starts the flaw detector and records and stores relevant data, parameters, images, flaw detection results, and axle end marking images during the flaw detection process. The relevant data will be uploaded to the centralized control module; the wheel set is transported to the next axle end plug disassembly and assembly module on the maintenance line for the disassembly of the plug, and at the same time, the digital gaussmeter completes the residual magnetism detection.

[0020] Step S7: The hollow axle flaw detection module receives the wheel set that has completed magnetic particle flaw detection. The supporting wheel positioning device and the connecting and picking wheel device push and lift the wheel set to the fixed axis position of each work station; the cleaning device scrapes off the rust preventive oil or coupling agent in the hollow part of the hollow axle and conducts supplementary cleaning; the automatic sliding table mechanism drives the hollow axle flaw detector to directly abut and connect the device with the axle end of the measured wheel set after cleaning, thereby completing the entire ultrasonic detection process; the oil spraying device automatically sprays rust preventive oil on the hollow part of the hollow axle of the wheel set that has completed the detection, and then the wheel set will be sent out of the hollow axle flaw detection module and enter the final axle end plug disassembly and assembly module to install the axle end plug.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention integrates a centralized control module, an axle number identification and input module, an automatic conveying module, an automatic steering module, a brake disc turning module, a wheel set turning module, an axle end plug disassembly and assembly module, a magnetic particle flaw detection module, and a hollow axle flaw detection module, with high automation and good operation consistency.

[0022] Compared with the current maintenance production line, the operation of the present invention is reduced from more than 10 people to within 3 people, greatly reducing the number of operating personnel, reducing the labor intensity of manpower, realizing staff reduction and efficiency increase, and significantly improving the operation efficiency.

[0023] The present invention is built-in with intelligent maintenance information software, with a high degree of informatization, realizing numerical management of the maintenance line. The operation data of each process and the equipment information can be uploaded and stored in real time, and the data traceability is good. Brief Description of the Drawings

[0024] Figure 1 It is a structural schematic diagram of an intelligent maintenance production line for a motor car wheel set of the present invention; Figure 2 It is a flowchart of an operation method for an intelligent maintenance production line for a motor car wheel set of the present invention; Figure 3Schematic diagram of the automatic conveying module and the automatic steering module of the present invention; Figure 4 Schematic diagram of the brake disc turning and grinding module of the present invention; Figure 5 Schematic diagram of the wheel set turning module; Figure 6 Schematic diagram of the shaft end plugging and disassembling module; Figure 7 Schematic diagram of the mechanical claw; Figure 8 Schematic diagram of the V-shaped positioning track; Figure 9 Schematic diagram of the hollow shaft flaw detection module; Figure 10 Schematic diagram of the shaft end plugging and disassembling module; Figure 11 Schematic diagram of the embodiment of the wheel pulling and pushing device.

[0025] Reference numerals: 1, centralized control module; 2, axle number identification and input module; 3, automatic conveying module; 4, automatic steering module; 5, brake disc turning and grinding module; 6, wheel set turning module; 7, shaft end plugging and disassembling module; 8, magnetic particle flaw detection module; 9, hollow shaft flaw detection module; 71, V-shaped positioning track; 72, mechanical claw; 73, digital gauss meter; 91, hollow shaft flaw detector; 92, automatic sliding table mechanism; 93, cleaning device; 94, oil injection device; 95, supporting wheel positioning device; 10, wheel pulling and pushing device. Detailed implementation manners

[0026] The following combines the drawings and the embodiments of the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 , a wheel set intelligent maintenance production line provided by the present invention includes a centralized control module 1, an axle number identification and input module 2, an automatic conveying module 3, an automatic steering module 4, a brake disc turning and grinding module 5, a wheel set turning module 6, a shaft end plugging and disassembling module 7, a magnetic particle flaw detection module 8 and a hollow shaft flaw detection module 9 connected to the centralized control module 1; The centralized control module 1 is connected to the wheel set maintenance information system; The axle number identification and input module 2 identifies and inputs the axle number of the wheel set to be maintained; The automatic conveying module 3 is used to transport the wheel sets to be maintained and those that have been maintained; The brake disc turning and grinding module 5 is connected to the automatic steering module 4 and is used for turning and grinding the wheel hub brake disc and the disc surface of the wheel set; The wheel set turning module 6 is connected to the automatic conveying module 3 and is used for turning the tread of the wheel set. The shaft end plugging and disassembling module 7 is connected to the automatic conveying module 3 and is used for plugging the shaft end of the wheel set. The magnetic particle flaw detection module 8 is used for magnetic particle flaw detection inspection of the wheel set and for fluorescent magnetic particle flaw detection of the wheel set. The hollow shaft flaw detection module 9 is connected to the automatic conveying module 3 and is used for flaw detection of the hollow shaft of the wheel set.

[0028] Preferably, the centralized control module 11 includes a centralized control operation station, an industrial control host, a display, and a printer connected to the industrial control host. The industrial control host is equipped with intelligent maintenance information software, which can realize the synchronous management of various maintenance functions of the intelligent maintenance production line according to the data issued by the wheel set maintenance information system and the data feedback from the intelligent maintenance production line. At the same time, it can monitor the processing status of each process during the maintenance process, automatically generate the status information of each device and the wheel set maintenance report form, and upload them to the wheel set maintenance information system.

[0029] The industrial control host selects the Jite Intelligent G500 embedded industrial control computer, which is equipped with the Haiguang 3330E processor, with optional 4-core / 8-core configuration, a main frequency of 3.0GHz, and supports high-concurrency data stream processing to meet the real-time calculation requirements of multi-parameters for wheel set detection.

[0030] Preferably, the axle number identification and input module 2 consists of a wheel set axle number identification system and a wheel set identity label mounting system. The wheel set axle number identification system and the wheel set identity label mounting system are application software systems developed based on a computer. The wheel set axle number identification system can automatically identify and judge the wheel set axle number, and after the identification information is remotely reviewed by personnel, it is automatically uploaded to the centralized control module 1. After the identification information is uploaded, the wheel set identity label mounting system will automatically generate an identity label and mount it on the target wheel set.

[0031] The automatic conveying module 3 mainly consists of a conveying line and a nylon protection backing plate. The conveying line adopts a sprocket and chain drive structure and is driven by a motor with a reducer. The entire conveying line adopts a segmented drive transmission method, and the transmission between each segment can be connected to each other or can be independent of each other. The conveying line conveys by pushing the wheel flange of the wheel. Nylon rollers are used in the part that contacts the wheel flange of the wheel, and when pushing the wheel set forward, it rolls with the axle and does not produce sliding friction with the axle, which is beneficial to the stable conveying of the wheel set on the track. The specific structure is the application of the existing technology and is similar to the structure of CN220641598U published on 2024-03-22, so it will not be elaborated here.

[0032] Such as Figure 3As shown, the automatic steering module 4 consists of a wheel engaging and disengaging device 10 and a turntable; the wheel engaging and disengaging device 10 can stop the target wheel set at the geometric center of the turntable, the turntable drives the wheel set to rotate to a specified angle, and after the turntable rotates in place, the wheel engaging and disengaging device 10 pulls the wheel set onto the required track.

[0033] As Figure 11 shown, it is an embodiment of the wheel engaging and disengaging device 10. The wheel engaging and disengaging device 10 is an L-shaped bracket as a whole. The right-angled parts connected to both sides of the bracket are hinged, the bottom edge is fixed, the right-angled side and the bottom edge are connected by an oil cylinder, and the push rod is movably connected to the end of the right-angled side; so that the right-angled side can rotate between the 45° position and the 90° position. The wheel engaging process is that when the wheel comes, it touches the bracket and makes the right-angled side rotate from 90° to 45°. The wheel disengaging is that the oil cylinder pushes the bracket to rotate from 45° to 90°, thereby pushing the wheel out.

[0034] The automatic steering module 4 is a cube composed of four sides consistent with the track cross-section. There is a turntable below the cube. When the wheel set enters the automatic steering module 4, the direction is changed by the rotation of the turntable.

[0035] As Figure 4 shown, the brake disc turning and milling module 5 consists of a wheel engaging and disengaging device 10 for the wheel set and a brake disc lathe; the wheel engaging and disengaging device 10 for the wheel set can fix the wheel set transported to the center of the brake disc lathe machine tool. The brake disc lathe can accept the instructions issued by the centralized control module 1 to turn and mill the wheel-mounted brake disc and the disc surface part of the wheel-mounted brake disc of the target wheel set, and return the processing information to the centralized control module 1 after the processing is completed. The wheel engaging and disengaging device 10 for the wheel set rolls the wheel set out of the machine tool.

[0036] As Figure 5 shown, the wheel set turning module 6 includes a numerically controlled wheel lathe; the numerically controlled wheel lathe adopts a gantry frame structure and is located on the track of the automatic conveying module 3, so that the wheel set can roll in and out smoothly, and can complete the turning of the target wheel set according to the data issued by the centralized control module 1, and at the same time automatically upload the equipment status and the wheel set turning processing information.

[0037] As Figures 6 - 8 and Figure 10 shown, the shaft end plug disassembly and assembly module 7 includes a mechanical claw 71, a V-shaped positioning track 72 and a digital gauss meter 73; the V-shaped positioning track is spliced with the track of the automatic conveying module 3. When the wheel set is pushed to the V-shaped groove of the V-shaped positioning track 72, the displacement is limited and fixed. The mechanical claw 71 grabs and installs the shaft end plug, and the digital gauss meter 73 performs residual magnetism detection.

[0038] Preferably, the magnetic particle flaw detection module 8 consists of a fluorescent magnetic particle flaw detector, a darkroom, and an industrial control computer. The darkroom is composed of an aluminum alloy skeleton. The fluorescent magnetic particle flaw detector is installed on the central axis of the track of the automatic conveying module 3 in the darkroom, and the loading and unloading of the wheelset are carried out by a special pneumatic and chain transmission method. The industrial control computer controls the liquid crystal display screen to display the real-time acquisition and monitoring of the magnetization parameters of the flaw detector, outputs, prints, and stores the daily, quarterly inspection records and flaw detection results of the flaw detector in the form of a report, and can perform functions such as playback, query, analysis, and statistics.

[0039] The industrial control computer selects the Advantech IPC-6606 industrial control computer, integrates the ADAM-4017 / 4520 module, real-time collects key parameters such as magnetization current and ultraviolet illuminance, and supports data upload through the HMIS interface.

[0040] As Figure 9 shown, the hollow shaft flaw detection module 9 includes a hollow shaft flaw detector 91, an automatic sliding table mechanism 92, a cleaning device 93, an oil spraying device 94, and a supporting wheel positioning device 95. The supporting wheel positioning device 95 and the wheel connecting and removing device 10 are installed at the pre-cleaning station, flaw detection station, coupling agent cleaning station, and oil spraying station on the maintenance line. The cleaning device 93 automatically cleans the hollow part of the wheelset's hollow shaft, and the oil spraying device 94 automatically sprays anti-rust oil on the hollow part of the hollow shaft. The automatic sliding table mechanism 92 can drive the hollow shaft flaw detector 91 to perform high-precision linear motion in the X and Y axes and rotate 90 degrees around the Z axis to complete the flaw detection of the hollow shaft.

[0041] As Figure 2 shown, a working method for an intelligent maintenance production line of a multiple unit wheelset is as follows: Step S1: According to the operation plan arrangement of the wheelset maintenance information system, the centralized control module 1 issues a task to the automatic conveying module 3 to convey the wheelset to be maintained to the axle number identification and input module 2. The axle number identification system identifies and judges the axle number, and uploads the information after manual review to the centralized control module 1. At the same time, the wheelset identity label mounting system generates a unique identity label for the wheelset and mounts it on the wheelset.

[0042] Step S2: The wheelset with the identity label mounted is conveyed to the automatic steering module 4 in front of the brake disc turning module 5. After the wheel connecting and removing device 10 receives the wheelset, the turntable drives the wheelset to rotate until the center line of the wheelset coincides with the center line of the brake disc turning module 5. The wheel connecting and removing device 10 pulls out the wheelset and pushes it into the brake disc turning module 5 and fixes it on the track of the automatic conveying module 3.

[0043] Step S3: The automatic conveying module 3 in the brake disc turning module 5 stops the rolling-in wheelset at the center of the machine tool. The brake disc lathe completes the turning of the brake disc of the wheelset according to the data of the centralized control module 1 and uploads the machining data of the wheelset to the centralized control module 1. The wheelset after turning is rolled out of the machine tool by the automatic conveying module 3, and the wheel engaging and disengaging device 10 receives and re-pulls it to the automatic conveying module 3.

[0044] Step S4: The wheelset after completing the brake disc turning is conveyed to the center of the CNC wheel lathe in the wheelset turning module 6 by the automatic conveying module 3. After the wheel lathe automatically sets the tool, it conducts automatic turning processing. The centralized control module 1 receives the feedback information after processing and issues an instruction to let the automatic conveying module 3 send the wheelset to the next process station.

[0045] Step S5: The wheelset arrives at the axle end plugging and unplugging module 7. The V-shaped positioning track 71 holds the wheelset at a fixed station. The axle neck height is automatically detected by the detection device to determine the relative position of the axle, and the mechanical claw 72 grabs and installs the axle end plug.

[0046] Step S6: After the axle end plug is installed, the wheelset is transported to the magnetic particle flaw detection module 8. The special pneumatic and chain conveying method places the wheelset on the fluorescent magnetic particle flaw detector. The industrial control computer automatically starts the flaw detector and records and stores the relevant data, parameters, images, flaw detection results, and axle end marking images during the flaw detection process. The relevant data will be uploaded to the centralized control module 1. The wheelset is transported to the next axle end plugging and unplugging module 7 under the inspection line for the removal of the plug, and at the same time, the digital gaussmeter 73 completes the residual magnetic detection.

[0047] Step S7: The hollow axle flaw detection module 9 receives the wheelset that has completed the magnetic particle flaw detection. The wheel support positioning device 95 and the wheel engaging and disengaging device 10 push and lift the wheelset to the fixed axis position at each station. The cleaning device 93 scrapes off the rust preventive oil or coupling agent in the hollow part of the hollow axle and conducts supplementary cleaning. The automatic slide table mechanism 92 drives the hollow axle flaw detector 91 to directly abut and connect the equipment with the cleaned axle end of the wheelset to be measured, thus completing the entire ultrasonic detection process. The oil spraying device 94 automatically sprays rust preventive oil on the hollow part of the hollow axle of the wheelset after the detection, and then the wheelset will be sent out of the hollow axle flaw detection module 9 and enter the last axle end plugging and unplugging module 7 to install the axle end plug.

[0048] The various embodiments described in this patent application are not isolated from each other, nor are the technical solutions in the embodiments independent of each other. Those skilled in the art should regard the entire specification as an organic whole. The technical solutions in the embodiments can be reasonably combined according to the actual situation, thereby deriving other embodiments that can be understood by those skilled in the art. At the same time, the above specific embodiments are only a part of the numerous preferred embodiments of the present invention. Based on the technical solutions disclosed in the present invention and the inspirations given by these embodiments, those skilled in the art are fully capable of making various forms of substitution, improvement, and combination of the above specific embodiments, and all of these should be covered within the protection scope of the present invention.

Claims

1. An intelligent overhaul production line for the wheelsets of multiple unit trains, characterized in that: It includes a centralized control module, an axle number identification and input module, an automatic conveying module, an automatic steering module, a brake disc turning module, a wheel set turning module, an axle end plugging and disassembling module, a magnetic particle flaw detection module, and a hollow axle flaw detection module connected to the centralized control module; The centralized control module is connected to the wheel set maintenance information system; The axle number identification and input module identifies and inputs the axle number of the wheel set to be maintained; The automatic conveying module is used to transport the wheel sets to be maintained and the maintained wheel sets; The brake disc turning module is connected to the automatic steering module and is used for turning the wheel load brake disc and the disc surface of the wheel set; The wheel set turning module is connected to the automatic conveying module and is used for turning the tread of the wheel set; The axle end plugging and disassembling module is connected to the automatic conveying module and is used for plugging the axle end of the wheel set; The magnetic particle flaw detection module is used for magnetic particle flaw detection inspection of the wheel set and for fluorescent magnetic particle flaw detection of the wheel set; The hollow axle flaw detection module is connected to the automatic conveying module and is used for flaw detection of the hollow axle of the wheel set.

2. The intelligent overhaul production line for the EMU wheel set according to claim 1, characterized in that: The centralized control module includes a centralized control operation station, an industrial control host, a display, and a printer connected to the industrial control host. The industrial control host is equipped with intelligent maintenance information software.

3. An intelligent overhaul production line for EMU wheelsets according to claim 1, characterized in that: The axle number identification and input module consists of a wheel set axle number identification system and a wheel set identity label mounting system.

4. An intelligent overhaul production line for EMU wheel sets according to claim 1, characterized in that: The automatic conveying module consists of a conveying line and a nylon protection backing plate.

5. An intelligent overhaul production line for the train wheelsets of multiple units, characterized in that: The automatic steering module consists of a wheel connecting and pulling device and a turntable; the wheel connecting and pulling device can stop the target wheel set at the geometric center of the turntable. The turntable drives the wheel set to rotate to a specified angle. After the turntable rotates in place, the wheel connecting and pulling device pulls the wheel set onto the required track.

6. The intelligent overhaul production line for the EMU wheel set according to claim 1, characterized in that: The brake disc turning module consists of a wheel set connecting and pulling device and a brake disc lathe.

7. An intelligent overhaul production line for EMU wheel sets according to claim 1, characterized in that: The wheel set turning module includes a numerically controlled wheel lathe.

8. An intelligent overhaul production line for the wheelsets of multiple units, characterized in that: The axle end plugging and disassembling module includes a V-shaped positioning track, a mechanical claw, and a digital gauss meter; the magnetic particle flaw detection module consists of a fluorescent magnetic particle flaw detector, a darkroom, and an industrial control computer.

9. The intelligent maintenance production line for the EMU wheelset according to claim 1, characterized in that: The hollow axle flaw detection module includes a hollow axle flaw detector, an automatic sliding table mechanism, a supporting wheel positioning device, a connecting and pulling wheel device, a cleaning device, and an oil spraying device; the supporting wheel positioning device and the connecting and pulling wheel device are provided at the pre-cleaning station, flaw detection station, coupling agent cleaning station, and oil spraying station on the maintenance line.

10. A working method of an intelligent maintenance production line for EMU wheel sets according to any one of claims 1-9, characterized in that, It includes the following steps: Step S1: According to the operation plan arrangement of the wheel set maintenance information system, the centralized control module issues a task to the automatic conveying module to transport the wheel set to be maintained to the axle number identification and input module. The axle number identification system identifies and judges the axle number, and uploads the information after manual review to the centralized control module. At the same time, the wheel set identity label mounting system generates a unique identity label for the wheel set and mounts it on the wheel set; Step S2: The wheel set with the identity label mounted is transported to the automatic steering module in front of the brake disc turning module. After the wheel connecting and pulling device receives the wheel set, the turntable drives the wheel set to rotate until the center line of the wheel set coincides with the center line of the brake disc turning module. The wheel connecting and pulling device pulls out the wheel set and pushes it into the brake disc turning module and fixes it on the track of the automatic conveying device; Step S3: The automatic conveying device in the brake disc turning module blocks the rolling-in wheelset at the center of the machine tool. The brake disc lathe completes the turning of the brake disc of the wheelset according to the data issued by the centralized control module and uploads the machining data of the wheelset to the centralized control module. The wheelset after turning is rolled out of the machine tool by the automatic conveying device, and the wheel engaging and pulling device receives it and pulls it back to the automatic conveying module. Step S4: The wheelset that has completed the brake disc turning is conveyed to the center of the CNC wheel lathe in the wheelset turning module through the automatic conveying module. After the automatic tool setting of the wheel lathe, automatic turning machining is carried out. The centralized control module receives the feedback information after machining and issues an instruction to let the automatic conveying module send the wheelset to the next process station. Step S5: The wheelset arrives at the axle end plug disassembly and assembly module. The V-shaped positioning track keeps the wheelset at the fixed station. The detection equipment automatically detects the axle neck height to determine the relative position of the axle, and the mechanical claw grabs and installs the axle end plug. Step S6: After the axle end plug is installed, the wheelset will be transported to the magnetic particle flaw detection module. The special pneumatic and chain conveying method places the wheelset on the fluorescent magnetic particle flaw detector. The industrial control computer automatically starts the flaw detector and records and stores the relevant data, parameters, images, flaw detection results and axle end marking images during the flaw detection process. The relevant data will be uploaded to the centralized control module. The wheelset is transported to the next axle end plug disassembly and assembly module under the inspection line for the disassembly of the plug. At the same time, the digital gaussmeter completes the residual magnetic detection. Step S7: The hollow axle flaw detection module receives the wheelset that has completed the magnetic particle flaw detection. The supporting wheel positioning device and the wheel engaging and pulling device push and lift the wheelset to the fixed axis position of each station. The cleaning device scrapes off the rust preventive oil or coupling agent in the hollow part of the hollow axle and conducts supplementary cleaning. The automatic sliding table mechanism drives the hollow axle flaw detector to directly abut and connect with the end of the axle of the tested wheelset after cleaning, thus completing the entire ultrasonic detection process. The oil spraying device automatically sprays rust preventive oil on the hollow part of the hollow axle of the wheelset after the detection. Then the wheelset will be sent out of the hollow axle flaw detection module and enter the final axle end plug disassembly and assembly module to install the axle end plug.

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