A subway depot structure and bogie maintenance process thereof

Abstract

The present invention relates to the field of rail vehicle maintenance technology, and in particular to a subway vehicle depot structure and a bogie maintenance process thereof, wherein the subway vehicle depot structure includes a wheelset maintenance area arranged on one side of an entrance passage and a frame maintenance area on the other side, the wheelset maintenance area is provided with a process track connecting a plurality of workstations, the frame maintenance area is provided with a passage and a plurality of AGV trolleys, the wheelset maintenance area is provided with a first disassembly and assembly station, the first disassembly and assembly station is connected to a bogie storage station and a bogie static load test station through a process track, the bogie storage station is located in the frame maintenance area, and the bogie static load test station is located in the wheelset maintenance area. The wheel sets and frames are cleaned, painted and maintained in different areas, and the processing processes are independent and non-interfering with each other, which greatly shortens the overall maintenance time of the bogie, and the positions of the related workstations are reasonably arranged to achieve flexible interaction between the two areas.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle maintenance, and in particular to a subway vehicle depot structure and a bogie maintenance process thereof. Background Art

[0002] The urban rail transit depot is the vehicle maintenance base, responsible for the operation and maintenance of the entire line of vehicles. The main purpose of designing and building the depot is to meet the operation and maintenance needs of the vehicles. The basic content of vehicle maintenance is to disassemble, clean, overhaul (or replace), assemble, and debug the various system components in the vehicle. Among them, the bogie is one of the important components of the vehicle, and its overhaul process design has a significant impact on the design of the depot.

[0003] The traditional bogie maintenance process mainly faces the following problems: the frame and wheelset are separated by manual disassembly, and the frame needs to be hoisted over a long distance by a crane, which takes a long time to transport, has low efficiency, and poses safety risks; the frame is generally cleaned by manual cleaning or spray cleaning equipment, which consumes a lot of time and water resources, and has a harsh working environment; the wheelset painting generally adopts chemical cleaning and removal, liquid spray cleaning and other methods, which have problems such as uneven painting and low operating efficiency; at the same time, the cleaning and painting processes of the bogie frame and wheelset use a shared workstation, which has a shortage of workstations and restricts the entire maintenance process. The above problems faced by the traditional bogie maintenance process are mainly caused by the unreasonable design of the vehicle depot, which leads to low maintenance efficiency, unsmooth processes, and a harsh working environment, affecting the maintenance quality.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problems of low efficiency, unsmooth process, harsh working environment and poor operation quality in traditional bogie maintenance operations. Summary of the invention

[0005] The purpose of the present invention is to provide a subway vehicle depot structure and its bogie maintenance process to address the technical problems of low efficiency, unsmooth process, harsh working environment and poor operation quality in traditional bogie maintenance operations.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A subway vehicle depot structure comprises a wheelset maintenance area arranged on one side of an entrance passage and a frame maintenance area on the other side, the wheelset maintenance area is provided with a process track connecting a plurality of workstations, the frame maintenance area is provided with a passage and a plurality of AGV trolleys, the wheelset maintenance area is provided with a first disassembly and assembly workstation, the first disassembly and assembly workstation is connected with a bogie storage workstation and a bogie static load test workstation through a process track, the bogie storage workstation is located in the frame maintenance area, and the bogie static load test workstation is located in the wheelset maintenance area.

[0008] A subway vehicle depot structure of the present invention, a first disassembly and assembly station is used to realize the disassembly of the bogie through the bogie automatic disassembly and assembly system; the bogie static load test station is used to detect and confirm the performance and parameters of the bogie through the bogie static load test bench; by zoning the wheelset maintenance area and the frame maintenance area, the wheelset and the frame are cleaned, painted and repaired in different areas, and the processing processes are independent of each other and do not interfere with each other, which greatly shortens the overall maintenance time of the bogie. At the same time, through the flexible and fast characteristics of the AGV trolley, the bogie and frame structural parts with larger body size can be quickly and accurately moved, the process transfer and maintenance of the bogie and the frame can be realized, the use of lifting and hoisting equipment can be reduced, and the transportation time of the bogie and the frame between the stations can be greatly shortened. At the same time, the positions of the related stations in the frame maintenance area and the wheelset maintenance area are reasonably arranged to realize the flexible interaction of the two areas, which provides a site structure foundation for the smooth disassembly, maintenance and assembly of the bogie.

[0009] As a preferred embodiment of the present invention, the frame maintenance area includes a frame cleaning station and a frame surface treatment station arranged in an array, and the frame cleaning station and the frame surface treatment station are arranged in an array at the tail of the process track of the bogie storage station and are located at the corners of the frame maintenance area. The frame cleaning station is used to clean the frame with water through an automated cleaning device, and the frame surface treatment station is used to repair and paint the frame through an outer skin treatment device; the frame cleaning station and the frame surface treatment station involve easily polluted factors such as water and paint, and being arranged at the corners is conducive to reducing the impact on the factory working environment and improving the factory working environment.

[0010] As a preferred solution of the present invention, the frame maintenance area further comprises a frame flipping station, a frame measuring station, a frame maintenance station and a frame storage station arranged in an arranged manner, and the frame storage station is arranged in a corner position away from the entrance in the frame maintenance area. The frame flipping station is used to realize the flipping of the frame through the flip frame, and assist in realizing multi-directional maintenance; the frame measuring station is used to detect and correct the frame external dimensions through the measuring platform; the frame maintenance station is used to maintain and service the frame through the maintenance platform; and each station adjusts its arrangement position according to actual conditions.

[0011] As a preferred embodiment of the present invention, a control room is arranged adjacent to the frame storage station, and an exit is arranged next to the control room.

[0012] As a preferred embodiment of the present invention, the wheelset maintenance area includes a wheelset cleaning station, a wheelset laser rust removal and paint stripping station, a wheelset fluorescent magnetic particle flaw detection station, a wheelset ultrasonic automatic flaw detection station, a wheelset surface treatment station and a wheelset storage station which are sequentially arranged along the straight process track. The wheelset cleaning station is used to clean the wheelset by means of automated cleaning equipment; the wheelset laser rust removal and paint stripping station is used to perform laser rust removal and paint stripping on the wheelset by means of laser rust removal and paint stripping equipment. Compared with the traditional manual cleaning and paint stripping with chemicals and liquid jet cleaning methods, it has higher efficiency, better working environment, is harmless to the human body, and the waste after use is easy to handle without secondary pollution; the wheelset fluorescent magnetic particle flaw detection station and the wheelset ultrasonic automatic flaw detection station are used to perform internal inspections on the wheelset; the wheelset surface treatment station is used to perform maintenance and painting on the wheelset according to the flaw detection results; the specific design of the wheelset maintenance area, combined with the moving characteristics of the wheelset, forms a wheelset surface treatment process maintenance line in a straight direction. After the wheelset is completed on the surface, it is used or stored for the next step according to the actual situation.

[0013] As a preferred embodiment of the present invention, the wheelset maintenance area further includes a CNC wheel lathe station, a wheelset bearing assembly station and a wheelset running-in test station arranged in sequence along the straight process track, and the wheelset running-in test station is connected to the second disassembly and assembly station. The CNC wheel lathe station is used to turn and repair the wheelset through a CNC lathe; the wheelset running-in test station is used to test the assembly of the wheelset bearings through the moving wheel set running-in test bench and the trailer wheel set running-in test bench; the second disassembly and assembly station is used to realize the assembly of the bogie through the bogie automatic disassembly and assembly system; the various stations are reasonably arranged to realize the smooth progress of the maintenance process, realize the smooth disassembly, maintenance and assembly of the bogie, and improve the overall maintenance efficiency.

[0014] As a preferred solution of the present invention, the second disassembly and assembly station is connected to the bogie static load test station through a straight process track, and the wheel skin treatment station is connected to the CNC wheel lathe station through a process track, forming a circular single-line process maintenance line connected end to end in the wheelset maintenance area. The overall process layout is matched with the maintenance sequence of the bogie and wheelset, the adjacent processes are closely connected, the transfer distance is short, and the maintenance time of the bogie is shortened to the greatest extent.

[0015] The subway depot bogie maintenance process adopts the subway depot structure as described above and includes the following steps:

[0016] S1: The bogie is transported to the first disassembly and assembly station by the AGV, and the bogie is disassembled by man-machine time-sharing operation at the first disassembly and assembly station to obtain a separated frame and wheelset;

[0017] S2: The frame is transported to the frame cleaning station by the AGV trolley, and the wheelset is transported to the wheelset cleaning station through the process track;

[0018] S3: The cleaned frame is transferred between the frame flipping station and the frame surface treatment station by the AGV car for flaw detection, repair and painting;

[0019] S4: The repaired and painted frame is transferred to the frame inspection station through the AGV car for maintenance, and the frame measurement station is used to detect and calibrate the frame dimensions;

[0020] S5: The cleaned wheelset passes through the wheelset laser rust removal and paint removal station, the wheelset fluorescent magnetic particle flaw detection station, the wheelset ultrasonic automatic flaw detection station, and the wheelset surface treatment station along the process track for flaw detection inspection, repair, and painting, and then enters the CNC wheel lathe station for turning and repair operations, and then enters the wheelset bearing assembly station for bearing assembly, and then passes through the wheelset running-in test station for assembly test;

[0021] S6: The frames and wheelsets that have passed the inspection enter the second disassembly and assembly station for human-machine time-sharing assembly or enter the corresponding storage station for storage;

[0022] S7: The assembled bogie enters the bogie static load test station to confirm the performance parameters. If qualified, it is output through the process track or stored in the bogie storage station.

[0023] The subway vehicle depot bogie maintenance process of the present invention has a smooth process flow, and combined with the subway vehicle depot structure that matches the maintenance sequence of the bogie and wheelset, adjacent processes are closely connected, the transfer distance is short, and the wheelset and frame are independently maintained in separate partitions without interfering with each other, thereby shortening the overall maintenance time of the bogie to the greatest extent.

[0024] As a preferred solution of the present invention, the man-machine time-sharing operation includes classifying each component into Class I components and Class II components according to volume and weight, the volume and weight of Class I components are both smaller than Class II components, the disassembly and assembly of Class I components are handled manually, and the disassembly and assembly of Class II components are handled by the robotic arm, and the Class I components include pipelines. The man-machine time-sharing operation makes full use of the characteristics of precise positioning and high operating efficiency of the robotic arm to achieve accurate decomposition and assembly of each component. Compared with the traditional mode, the number of operators can be reduced from 3 to 4 people to 1 to 2 people, and at the same time greatly improves the efficiency of disassembly and assembly of the bogie.

[0025] As a preferred solution of the present invention, the frame cleaning station includes a closed unmanned intelligent cleaning device, which realizes the cleaning operation by reciprocating fixed-point spraying through a mechanical arm, and the wheelset cleaning station includes manual cleaning operations. The closed unmanned cleaning operation effectively avoids pollution to the factory environment and improves the factory working environment. Compared with the traditional integral nozzle cleaning mechanism, it can save a lot of water resources under the same cleaning effect, and the cleaning efficiency is increased by more than 1 times.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. By setting up the wheel set maintenance area and the frame maintenance area in different areas, the wheel set and the frame can be cleaned, painted and repaired in different areas. The processing processes are independent and do not interfere with each other, which greatly shortens the overall maintenance time of the bogie.

[0028] 2. Through the flexible and fast characteristics of AGV trolleys, it can realize the rapid and accurate movement of large parts of bogies and frames, realize the process transfer and maintenance of bogies and frames, reduce the use of lifting equipment, and greatly shorten the transportation time of bogies and frames between various workstations;

[0029] 3. Reasonably arrange the positions of related workstations in the frame maintenance area and wheelset maintenance area to achieve flexible interaction between the two areas, providing a site structure foundation for the smooth disassembly, maintenance and assembly of the bogie. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a subway vehicle depot structure of the present invention;

[0031] Figure 2 is a schematic diagram of the layout of the frame maintenance area in Example 1;

[0032] Figure 3 It is a schematic diagram of the layout of the wheelset maintenance area in Example 1.

[0033] icon:

[0034] 1-wheelset maintenance area, 11-entrance, 12-process track, 2-frame maintenance area, 21-passageway, 22-AGV trolley, 23-control room, 24-exit, 3-first disassembly and assembly station, 4-bogie storage station, 5-bogie static load test station, 6-frame cleaning station, 7-frame surface treatment station, 8-frame flipping station, 9-frame measurement station, 10-frame maintenance Workstations: 20-frame storage station, 30-wheelset cleaning station, 40-wheelset laser rust removal and paint stripping station, 50-wheelset fluorescent magnetic particle flaw detection station, 60-wheelset ultrasonic automatic flaw detection station, 70-wheelset surface treatment station, 80-wheelset storage station, 90-CNC wheel lathe station, 100-wheelset bearing assembly station, 200-wheelset running-in test station, 300-second disassembly and assembly station. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] Example 1

[0038] like Figure 1 As shown, a subway vehicle depot structure has an overall rectangular structure. The entrance 11 is located in the middle of one long side of the building. One side of the entrance 11 is a wheelset maintenance area 1, and the other side is a frame maintenance area 2. The frame maintenance area 2 is provided with a passage 21 and a number of AGV carts 22 to realize the circulation maintenance of the frame between workstations. The wheelset maintenance area 1 is provided with a process track 12 to realize the circulation maintenance of the wheelsets between workstations.

[0039] Specifically, a first disassembly and assembly station 3 is arranged in the wheelset maintenance area 1 near the entrance 11. The first disassembly and assembly station 3 is connected to the bogie storage station 4 in the frame maintenance area 2 through a straight process track 12 perpendicular to the entrance 11 channel, and is connected to the bogie static load test station 5 located in the wheelset maintenance area 1 through a straight process track 12 along the entrance 11 channel.

[0040] Specifically, in the wheelset maintenance area 1, along the longitudinal direction of the factory building, the first disassembly and assembly station 3 is connected in sequence to the wheelset cleaning station 30, the wheelset laser rust removal and paint stripping station 40, the wheelset fluorescent magnetic particle flaw detection station 50, the wheelset ultrasonic automatic flaw detection station 60, the wheelset surface treatment station 70 and the wheelset storage station 80 through a straight process track 12; the wheelset surface treatment station 70 is connected to the CNC wheel lathe station 90 through the process track 12 along the direction of the entrance 11 channel, the CNC wheel lathe station 90 is connected in sequence to the wheelset bearing assembly station 100, the wheelset running-in test station 200 and the second disassembly and assembly station 300 through the straight process track 12, and the second disassembly and assembly station 300 is connected to the bogie static load test station 5 through the straight process track 12, forming a circular single-line process maintenance line connected end to end.

[0041] Specifically, the frame maintenance area 2 is provided with a frame cleaning station 6 and a frame surface treatment station 7 at the tail end of the process track 12 of the bogie storage station 4, and the frame cleaning station 6 and the frame surface treatment station 7 are located at the corners of the frame maintenance area 2.

[0042] Specifically, inside the factory building on the other side parallel to the frame storage station 20, a frame turning station 8, a frame measuring station 9, a frame maintenance station 10 and a frame storage station 20 are arranged in an array. The frame storage station 20 is arranged at a corner position away from the entrance 11 in the frame maintenance area 2. A control room 23 is arranged adjacent to the frame storage station 20, and an exit 24 is arranged next to the control room 23.

[0043] When a subway vehicle depot structure of the present invention is undergoing bogie maintenance, the bogie is transported to the entrance 11 by the AGV trolley 22, and is disassembled at the first disassembly and assembly station 3 to form an independent frame and wheelset. The wheelset is circulated and maintained along each station through the process track 12, and the frame is transported to the frame maintenance area 2 for maintenance by the AGV trolley 22, so as to realize zoned cleaning, painting and maintenance operations of the wheelset and the frame. The processing processes are independent of each other and do not interfere with each other, which greatly shortens the overall maintenance time of the bogie. Moreover, through the flexible and fast characteristics of the AGV trolley, the fast and accurate movement of larger components of the bogie and frame-like structures is realized, the process transfer and maintenance of the bogie and frame are realized, the use of lifting and hoisting equipment is reduced, and the transportation time of the bogie and frame between the stations is greatly shortened. At the same time, the positions of the related stations in the frame maintenance area 2 and the wheelset maintenance area 1 are reasonably arranged to realize flexible interaction between the two areas, providing a site structure foundation for the smooth disassembly, maintenance and assembly use of the bogie.

[0044] Example 2

[0045] The subway depot bogie maintenance process adopts the subway depot structure as described above and includes the following steps:

[0046] S1: The bogie is transported to the first disassembly and assembly station 3 by the AGV trolley 22, and the bogie is disassembled by human-machine time-sharing operation at the first disassembly and assembly station 3 to obtain a separated frame and wheelset;

[0047] S2: The frame is transported to the frame cleaning station 6 by the AGV trolley 22, and the wheelset is transported to the wheelset cleaning station 30 by the process track 12;

[0048] S3: The cleaned frame is transferred between the frame flipping station 8 and the frame surface treatment station 7 by the AGV trolley 22 for flaw detection, repair and painting;

[0049] S4: The repaired and painted frame is transferred to the frame inspection station 10 through the AGV trolley 22 for maintenance, and the frame measurement station 9 is used to detect and calibrate the frame dimensions;

[0050] S5: The cleaned wheelset passes through the wheelset laser rust removal and paint removal station 40, the wheelset fluorescent magnetic particle flaw detection station 50, the wheelset ultrasonic automatic flaw detection station 60, and the wheelset surface treatment station 70 along the process track 12 for flaw detection inspection, repair, and painting, and then enters the CNC wheel lathe station 90 for turning and repair operations, and then enters the wheelset bearing assembly station 100 for bearing assembly, and then passes through the wheelset running-in test station 200 for assembly test;

[0051] S6: The frames and wheelsets that have passed the inspection enter the second disassembly and assembly station 300 for human-machine time-sharing assembly or enter the corresponding storage station for storage;

[0052] S7: The assembled bogie enters the bogie static load test station 5 to confirm the performance parameters. If qualified, it is output through the process track 12 or enters the bogie storage station 4 for storage.

[0053] The subway vehicle depot bogie maintenance process of the present invention is combined with Figure 1 A subway vehicle depot structure is introduced. After the bogie is separated from the car body, it is transported to the bogie wheelset bearing room by the process track 12, and the bogie is transported to the first disassembly and assembly station 3 on the north side by the AGV car 22. The first disassembly and assembly station 3 is subdivided into a pre-disassembly station and a disassembly station. At the pre-disassembly station, small components such as lines and pipelines of the bogie are manually disassembled and then transported to the disassembly station. The large components of the bogie are automatically disassembled by multiple robotic arms of the bogie automatic disassembly and assembly system, realizing man-machine time-sharing operation.

[0054] For the frame: the disassembled frame is transported by the AGV car 22 to the frame cleaning station 6 on the west side, and a fully enclosed, unmanned intelligent cleaning equipment is used to perform reciprocating spraying and cleaning operations on the frame; after cleaning, the frame is transported by the AGV car 22 to the frame flipping station 8, and the frame appearance is inspected and flaw-detected in conjunction with the frame flipping frame, and then transported to the workshop of the frame surface treatment station 7, and the outer skin treatment equipment is used to repair and paint the frame according to the degree of damage to the frame; the painted frame is transported by the AGV car 22 to the frame maintenance platform of the frame maintenance station 10 for maintenance and care, and then the frame measurement platform of the frame measurement station 9 is used to detect and calibrate the frame's external dimensions, and after passing the inspection, it is transported to the frame storage area for storage or use.

[0055] For wheelsets: after the wheelsets are separated from the bogies, they are transported eastwards from the process track 12 to the wheelset cleaning station 30 for manual cleaning, and then transported eastwards from the process track 12 to the wheelset laser rust removal and paint removal station 40, where the wheels are treated with mechanical arms, dust collectors, laser cleaning machines and other components. After that, the wheelsets are inspected and painted by the fluorescent magnetic particle flaw detector at the wheelset fluorescent magnetic particle flaw detector station 50, the wheelset ultrasonic automatic flaw detector at the wheelset ultrasonic automatic flaw detector station 60 and the wheelset skin treatment equipment at the wheelset skin treatment station 70. After being painted, the wheelsets are transported eastwards from the process track 1 to the wheelset laser rust removal and paint removal station 40, where the wheelset skin is treated with mechanical arms, dust collectors, laser cleaning machines and other components, and then inspected and painted by the fluorescent magnetic particle flaw detector at the wheelset fluorescent magnetic particle flaw detector station 50, the wheelset ultrasonic automatic flaw detector at the wheelset ultrasonic automatic flaw detector station 60 and the wheelset skin treatment equipment at the wheelset skin treatment station 70. 2 is transported to the CNC wheel lathe station 90, where the wheel rim and tread of the wheelset are subjected to high-precision CNC turning, and then the wheelset enters the workshop of the wheelset bearing assembly station 100 for bearing assembly; the wheelset with assembled bearings is transported to the west along the process track 12, and the wheelset and bearing assembly are tested using the trailer wheelset running-in test bench and the moving wheelset running-in test bench of the wheelset running-in test station 200; after the test is qualified, the wheelset is transported to the west along the process track 12 to the second disassembly and assembly station 300 for frame and wheelset assembly, or transported to the wheelset storage station for storage.

[0056] The frames and wheelsets that have been inspected and tested and qualified are assembled in the second disassembly and assembly station 200 by human-machine time-sharing. Similar to the first disassembly and assembly station 3, small components such as lines and pipelines are assembled manually, and large components are assembled automatically by robotic arms. At the same time, vulnerable and consumable parts of the primary and secondary suspension devices are replaced, and small components such as the axle box vertical stop, central traction device, anti-roll device, etc. are cleaned and inspected.

[0057] The assembled bogie enters the bogie static load test station 5, and various performances and parameters are confirmed through the bogie static load test bench to realize bogie debugging. After debugging, it is transported to other workshops through the process track 12 for assembly with the car body as needed, or transported to the bogie storage station 4 for storage.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A subway vehicle depot structure, characterized in that: The invention comprises a wheelset maintenance area (1) arranged on one side of an entrance (11) passage and a frame maintenance area (2) on the other side, wherein the entrance is arranged in the middle of one side of a long side of a rectangular structure factory building, the wheelset maintenance area (1) is provided with a process track (12) connecting a plurality of workstations, the frame maintenance area (2) is provided with a passage (21) and a plurality of AGV trolleys (22) to realize the flow maintenance of the frame between the workstations, the wheelset maintenance area (1) is provided with a process track (12) to realize the flow maintenance of the wheelset between the workstations, the wheelset maintenance area (1) is provided with a first disassembly and assembly station (3) at a position near the entrance (11), the first disassembly and assembly station (3) is connected to a bogie storage station (4) in the frame maintenance area (2) through a process track (12) perpendicular to the entrance (11) passage, and is connected to a bogie static load test station (5) located in the wheelset maintenance area (1) through a straight process track (12) along the entrance (11) passage; The frame maintenance area (2) comprises a frame cleaning station (6) and a frame surface treatment station (7) arranged in an array, wherein the frame cleaning station (6) and the frame surface treatment station (7) are arranged in an array at the tail of a process track (12) of a bogie storage station (4) and are located at a corner position of the frame maintenance area (2); The frame maintenance area (2) further comprises a frame turning station (8), a frame measuring station (9), a frame maintenance station (10) and a frame storage station (20) arranged in an array inside the factory building on the other side parallel to the frame storage station, wherein the frame storage station (20) is arranged at a corner position in the frame maintenance area (2) away from the entrance (11); A control room (23) is disposed adjacent to the frame storage station (20), and an exit (24) is disposed next to the control room (23); The wheelset maintenance area (1) comprises a wheelset cleaning station (30), a wheelset laser rust removal and paint removal station (40), a wheelset fluorescent magnetic particle flaw detection station (50), a wheelset ultrasonic automatic flaw detection station (60), a wheelset surface treatment station (70) and a wheelset storage station (80) which are sequentially arranged along a straight process track (12) in the longitudinal direction of the plant; The wheelset surface treatment station (70) is connected to the CNC wheel lathe station (90) via a process track in the direction of the entrance channel, the CNC wheel lathe station (90) is sequentially connected to the wheelset bearing assembly station (100) and the wheelset running-in test station (200) via a linear process track, and the wheelset running-in test station (200) is connected to the second disassembly and assembly station (300); The second disassembly and assembly station (300) is connected to the bogie static load test station (5) via a straight process track (12), and the wheelset surface treatment station (70) is connected to the CNC wheel lathe station (90) via a process track (12), thereby forming a circular single-line process maintenance line connected end to end in the wheelset maintenance area (1).

2. Metro vehicle depot bogie maintenance process, characterized in that: The subway vehicle depot structure as claimed in claim 1 is adopted, and comprises the following steps: S1: transporting the bogie to the first disassembly and assembly station (3) by means of an AGV trolley (22), disassembling the bogie in a human-machine time-sharing operation at the first disassembly and assembly station (3) to obtain a separated frame and wheelset; S2: transporting the frame to the frame cleaning station (6) via the AGV trolley (22), and transporting the wheelset to the wheelset cleaning station (30) via the process track (12); S3: The cleaned frame is transferred between the frame flipping station (8) and the frame surface treatment station (7) by the AGV trolley (22) for flaw detection, repair and painting; S4: The repaired and painted frame is transferred to the frame inspection station (10) through the AGV car (22) for maintenance, and the frame measurement station (9) is used to detect and calibrate the frame dimensions; S5: The cleaned wheelset passes through the wheelset laser rust removal and paint removal station (40), the wheelset fluorescent magnetic particle flaw detection station (50), the wheelset ultrasonic automatic flaw detection station (60), and the wheelset surface treatment station (70) along the process track (12) for flaw detection inspection, repair, and painting, and then enters the CNC wheel lathe station (90) for turning and repair operations, and then enters the wheelset bearing assembly station (100) for bearing assembly, and then passes through the wheelset running-in test station (200) for assembly test; S6: The frames and wheelsets that have passed the inspection enter the second disassembly and assembly station (300) for human-machine time-sharing assembly or enter the corresponding storage station for storage; S7: The assembled bogie enters the bogie static load test station (5) to confirm the performance parameters. If qualified, it is output through the process track (12) or enters the bogie storage station (4) for storage.

3. The subway vehicle depot bogie maintenance process according to claim 2, characterized in that: The human-machine time-sharing operation includes classifying each component into Class I components and Class II components according to volume and weight. The volume and weight of the Class I components are smaller than those of the Class II components. The disassembly and assembly of the Class I components are handled manually, and the disassembly and assembly of the Class II components are handled by robotic arms. The Class I components include pipelines.

4. The subway vehicle depot bogie maintenance process according to claim 3, characterized in that: The frame cleaning station (6) includes a closed unmanned intelligent cleaning device, which uses a mechanical arm to use reciprocating fixed-point spraying to achieve a cleaning operation, and the wheelset cleaning station (30) includes a manual cleaning operation.

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