A railway wagon bearing backstop repair system and repair process

Abstract

The application discloses a railway freight car bearing rear stop repairing system and a repairing process, and relates to the technical field of bearing machining, which comprises the following steps: S1, ultrasonic cleaning; S2, blow-drying; S3, sanding and rust removal; S4, inner diameter measurement; S5, cold welding and material addition; S6, numerical control turning; S7, pickling and phosphating; S8, cleaning and blow-drying; S9, oil coating and phosphating layer sealing; and S10, detection. The application has the advantages of ingenious structure and reasonable design, and can repair the wear and deformation and size out-of-tolerance of the rear stop by using the cold welding and material addition technology, so that the repairing cost is greatly reduced compared with the existing repairing process of replacing the old with the new. The repairing scheme has the advantages of low cost and high input-output ratio.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, and in particular to a repair system and repair process for the rear bearing of railway freight cars. Background Technology

[0002] Currently, during the factory maintenance of freight cars on my country's railways, it has been found that the rear bearings are prone to wear and deformation due to repeated pressing, unloading, and use, resulting in problems such as dimensional deviations and a high scrap rate. In particular, the scrap rate of 60T-class bearing rear bearings is as high as 60%-80%. The scrapped rear bearings can only be replaced with new ones, which causes a lot of waste of resources and increases the cost of repair.

[0003] Existing bearings, due to prolonged rotation, experience wear during use, requiring regular inspection and maintenance by the driver. However, bearings need to be replaced when they reach a certain wear level, with unqualified bearings being scrapped, increasing maintenance costs and resulting in significant waste as the replaced bearings cannot be used. Therefore, this application provides a railway freight car bearing rear section repair system and repair process to meet this need. Summary of the Invention

[0004] The purpose of this application is to provide a railway freight car bearing rear section repair system and repair process, which realizes the use of cleaning and drying methods for processing, thereby solving the problems of bearing rear section wear, deformation and dimensional deviation.

[0005] To achieve the above objectives, this application provides the following technical solution: a repair process for the rear bearing of railway freight cars, comprising the following steps,

[0006] S1. Ultrasonic cleaning: Place the rear bumper to be inspected into an ultrasonic cleaner, add a measured amount of metal degreasing and rust removal cleaning agent, and immerse it in water for ultrasonic cleaning.

[0007] S2. Drying: Place the rear panel, which has been boiled and washed, on the automatic air-drying conveyor for air drying. After one side is dried, the other side is dried.

[0008] S3. Sandblasting and rust removal: Use a quartz sandblasting machine to clean the surface of the rear bumper after cleaning and drying, so as to achieve a state of no oil and no rust.

[0009] S4. Inner diameter measurement: After sandblasting, move the rear bumper onto the measuring device and use an inside micrometer to measure the d value of the inner ring of the rear bumper. If it meets the standard size, it can directly proceed to the surface phosphating treatment. If it does not meet the standard size, it will undergo cold welding additive processing.

[0010] S5. Cold welding additive manufacturing: Place the rear guard with out-of-tolerance inner ring on the chuck of the cold welding machine, fix it, start the equipment, and perform cold welding on the inner ring of the rear guard.

[0011] S6, CNC turning: Move the rear section onto the turning machine, place the cold-welded rear section on the CNC lathe chuck and turn it again to achieve its working dimensions;

[0012] S7. Pickling and Phosphating: Place the qualified rear bumper into the phosphating solution pool and perform phosphating treatment on the surface of the rear bumper.

[0013] S8. Cleaning and drying: Clean and dry the pickled and phosphated workpieces.

[0014] S9. Apply oil to seal the phosphated layer: Apply oil to seal the phosphated back section.

[0015] S10. Inspection: The oil-sealed rear guard shall be inspected and a comprehensive inspection test shall be conducted to ensure that the product quality meets the requirements of railway freight cars for bearing rear guards.

[0016] The preferred embodiment of the above technical solution includes a device platform, with casters fixedly installed at the four corners of the bottom of the device platform. A door is rotatably connected to the surface of the device platform, and a transparent glass is installed on the surface of the door. An acoustic cleaning chamber is installed inside the device platform, and a fixed frame is provided inside the acoustic cleaning chamber. A handle is fixedly connected to the fixed frame, a connecting frame is fixedly connected to the bottom of the fixed frame, and a base plate is fixedly connected to the bottom of the connecting frame. A crossbar is provided on the fixed frame, and a storage rack is threadedly connected to the crossbar. An mounting plate is fixedly installed on the fixed frame by bolts, and a fixed plate is fixedly connected to the mounting plate. A lifting lug is threadedly connected to the middle of the fixed plate. The device also includes a transport component, a drying component, and a storage component. The transport component is used in conjunction with the device platform, the drying component is used in conjunction with the transport component, and the storage component is used in conjunction with the drying component.

[0017] Preferably, the transport component includes a pair of brackets fixedly connected to one side of the equipment platform, a connecting plate fixedly connected between the pair of brackets, a bracket fixedly connected between the pair of brackets, and one end of the bracket fixedly connected to the equipment platform.

[0018] Preferably, rollers are rotatably connected to both ends of the bracket, a material belt is fitted on the rollers, a first pulley is fixedly connected to one end of the rollers, a transmission belt is fitted on the first pulley, the other end of the transmission belt is fitted on a second pulley, the second pulley is fixedly mounted on a rotating shaft, a fixed seat is fitted on the rotating shaft, the fixed seat is fixedly connected to the connecting plate, one end of the rotating shaft is fixedly connected to the output end of a first motor, and the first motor is fixedly mounted on the connecting plate.

[0019] Preferably, the air-drying assembly includes a side plate fixedly installed on one side of the bracket, a pair of fans fixedly installed on the side plate, a pair of sleeve blocks fixedly connected to the rear side of the side plate, a limiting rod movably inserted on the pair of sleeve blocks, the top end of the limiting rod fixedly connected to the top plate, a handle fixedly connected to one side of the top plate, and an equipment rack fixedly connected to the other side of the top plate.

[0020] Preferably, a limiting plate is fixedly connected to the bottom center of the top plate, and a slot is provided on the limiting plate. A stop block is fixedly connected to the side plate, and a pull rod is movably inserted into the stop block. A shaft pin is fixedly connected to the pull rod, and one end of the pull rod is fixedly connected to a moving block. A locking block is fixedly connected to the moving block, and the locking block is locked in the slot.

[0021] Preferably, a spring is fitted onto the pull rod, and the two ends of the spring are fixedly connected to one side of the stop block and one side of the moving block, respectively.

[0022] Preferably, a pair of sliding rods are fixedly connected to one side of the movable block, and a slider is sleeved on the pair of sliding rods, the slider being fixedly installed on the stop block.

[0023] Preferably, the storage assembly includes a docking frame fixedly installed on the equipment rack, a pair of clamps fixedly connected to the docking frame, a second motor fixedly installed on the pair of clamps, a main shaft fixedly connected to the output end of the second motor, and a half gear fixedly connected to the main shaft.

[0024] Preferably, the half gear meshes with a gear belt, and the two ends of the gear belt are respectively sleeved on the full gear. A sleeve is fixedly connected to the full gear, and the sleeve is rotatably connected inside the equipment frame. A threaded hole is opened on the sleeve, and a fixing rod is threadedly connected inside the threaded hole. A placement frame is fixedly connected to the surface of the fixing rod.

[0025] The present invention also provides a method for repairing the rear bearing of a railway freight car, comprising the following steps:

[0026] S1. Place the collected bearing back sections one by one on the shelf, and then connect the lifting lugs through the hoisting device so that the entire fixed frame enters the ultrasonic cleaning box for ultrasonic cleaning. A certain amount of metal degreasing and rust removal cleaning agent is added to the ultrasonic cleaning box and boiled for 4 hours at a water temperature of 60℃-80℃.

[0027] S2. After cleaning, the bearing backing is placed on the material conveyor belt. The residual liquid in the bearing backing will be discharged through the round hole. Then, the bearing backing is manually hung on the placement rack. The fan and the second motor work together to air dry different sides of the bearing backing on the placement rack.

[0028] S3. After air drying, place the rear bumper with out-of-tolerance inner ring on the chuck of the cold welding machine, fix it, and start the equipment to perform cold welding on the inner ring of the rear bumper. The cold welding parameters are: welding speed: 4.6-5.9mm / s, welding current: 170-200A. After processing, the rear bumper is re-machined by a CNC machine tool. The rear bumper that meets the requirements is placed in the phosphating solution bath and immersed for 15-20 minutes at a phosphating solution temperature of 20℃ to 40℃ to perform phosphating treatment on the surface of the rear bumper.

[0029] In summary, the technical effects and advantages of this invention are as follows:

[0030] 1. The present invention has a reasonable structure. When it is necessary to air dry the bearing backing, the cleaned bearing backing is placed on the material belt. The residual water on the bearing backing is drained through the round holes on the material belt. Then, the bearing backings on the material belt are manually hung in the placement racks on the fixed rods. The rotation of the second motor causes the placement racks to rotate intermittently, which facilitates the air drying of different sides of the bearing backings on the placement racks by the fan on the side plate. This increases the air drying of the bearing backings, making it easier to process the bearing backings later and increasing the efficiency of bearing backing processing.

[0031] 2. In this invention, when it is necessary to adjust the height of the top plate or install fixed rods of different lengths, the axle pin is pulled. The axle pin is fixedly connected to the pull rod. The movement of the axle pin drives the pull rod to move. A moving block is fixedly connected to one end of the pull rod, and a locking block is fixedly connected to the moving block. The locking block is locked in the slot by the elastic force of the spring. The movement of the pull rod drives the locking block on the moving block to disengage from the slot. Then, the handle on the top plate is pulled, so as to facilitate the free adjustment of the height of the equipment frame. When the axle pin is released, the locking block will fix the position of the equipment frame by the elastic force of the spring.

[0032] 3. In this invention, when it is necessary to rotate the bearing rear section on the placement rack, the second motor starts to operate. The operation of the second motor causes the main shaft to rotate. A half gear is fixedly connected to the main shaft, and the half gear meshes with the gear belt. The rotation of the half gear drives the gear belt to rotate. The two ends of the gear belt are sleeved on the full gear. The rotation of the gear belt drives the full gear to rotate. When the half gear rotates to the position where there is no jamming, the placement rack will stop rotating, thereby facilitating the intermittent rotation of the placement rack, so that the fan can perform the air drying work on the bearing rear section on the placement rack. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of the equipment platform;

[0035] Figure 2 This is a side view of the three-dimensional structure of the equipment platform;

[0036] Figure 3 A schematic diagram of the equipment platform from a bottom-up perspective;

[0037] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixing frame;

[0038] Figure 5 This is a schematic diagram of the three-dimensional structure of the equipment rack;

[0039] Figure 6 This is a schematic diagram of the internal structure of the equipment rack;

[0040] Figure 7 This is a schematic diagram of the three-dimensional structure of the shelf;

[0041] Figure 8 for Figure 3 Enlarged structural diagram at point A in the middle;

[0042] Figure 9 This is a flowchart of the workflow of the present invention.

[0043] In the diagram: 1. Equipment platform; 101. Casters; 102. Door; 103. Transparent glass; 104. Acoustic cleaning tank; 105. Mounting frame; 106. Handle; 107. Connecting frame; 108. Base plate; 109. Crossbar; 110. Shelf; 112. Bolt; 113. Mounting plate; 114. Fixing plate; 115. Lifting lug; 2. Bracket; 201. Connecting plate; 202. Bracket; 203. Roller; 204. Material belt; 205. First pulley; 206. Drive belt; 207. Second pulley; 208. Shaft; 209. Mounting base; 210. First motor 3. Side plate; 301. Fan; 302. Sleeve block; 303. Limiting rod; 304. Top plate; 305. Handle; 306. Equipment rack; 4. Limiting plate; 401. Slot; 402. Stop block; 403. Pull rod; 404. Shaft pin; 405. Moving block; 406. Locking block; 407. Spring; 408. Slide rod; 409. Slider; 5. Connecting frame; 501. Clamp; 502. Second motor; 503. Main shaft; 504. Half gear; 505. Gear belt; 506. Full gear; 507. Sleeve; 508. Threaded hole; 509. Fixing rod; 510. Placement rack. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example: Reference Figure 1-3 The system and process for repairing the rear bumper of a railway freight car bearing shown includes an equipment platform 1. Casters 101 are fixedly installed at the four corners of the bottom of the equipment platform 1. A door 102 is rotatably connected to the surface of the equipment platform 1. A transparent glass 103 is installed on the surface of the door 102. An acoustic cleaning chamber 104 is installed inside the equipment platform 1. A fixing frame 105 is installed inside the acoustic cleaning chamber 104. A handle 106 is fixedly connected to the fixing frame 105. A connecting frame 107 is fixedly connected to the bottom of the fixing frame 105. The bottom of the connecting frame 107 is fixed... The system includes a base plate 108, a crossbar 109 on a mounting frame 105, a shelf 110 threadedly connected to the crossbar 109, a mounting plate 113 fixedly mounted on the mounting frame 105 by bolts 112, a fixing plate 114 fixedly connected to the mounting plate 113, and a lifting lug 115 threadedly connected to the middle of the fixing plate 114; it also includes a transport component, a drying component, and a shelf component. The transport component is used in conjunction with the equipment platform 1, the drying component is used in conjunction with the transport component, and the shelf component is used in conjunction with the drying component.

[0046] Specifically, it should be noted that the acoustic cleaning chamber 104 utilizes existing technology, and its specific working principle is based on existing technology. The fan 301 and the second motor 502 are electrically connected to the control unit via wires, and their specific working principle is also based on existing technology, which will not be elaborated upon here. The acoustic cleaning chamber 104 can clean the bearing backplate inside the handle 106. After cleaning, it is connected to the lifting lug 115 via a lifting device, facilitating the removal of the fixing frame 105 from the acoustic cleaning chamber 104. Then, it is dried using the air-drying assembly. Next, it is processed using cold welding additive manufacturing, and then the excess bearing backplate is cut off using a CNC machine tool. Finally, it undergoes phosphating treatment using a room-temperature phosphating solution. The purpose of phosphating treatment is to improve the metal's corrosion resistance. Ensuring that the workpiece undergoes phosphating treatment at a suitable temperature and time is a key factor in the phosphating reaction.

[0047] As one implementation method in this embodiment, according to the appendix Figure 4 and 5 As shown, the transport assembly includes a pair of brackets 2 fixedly connected to one side of the equipment platform 1. A connecting plate 201 is fixedly connected between the pair of brackets 2. A bracket 202 is fixedly connected between the pair of brackets 2. One end of the bracket 202 is fixedly connected to the equipment platform 1. Rollers 203 are rotatably connected to both ends of the bracket 202. A material belt 204 is sleeved on the roller 203. A first pulley 205 is fixedly connected to one end of the roller 203. A transmission belt 206 is sleeved on the first pulley 205. The other end of the transmission belt 206 is sleeved on a second pulley 207. The second pulley 207 is fixedly installed on a rotating shaft 208. A fixing seat 209 is sleeved on the rotating shaft 208. The fixing seat 209 is fixedly connected to the connecting plate 201. One end of the rotating shaft 208 is fixedly connected to the output end of a first motor 210. The first motor 210 is fixedly installed on the connecting plate 201.

[0048] Specifically, when it is necessary to air dry the bearing backing, the cleaned bearing backing is placed on the material belt 204, and the residual moisture on the bearing backing is drained through the round holes on the material belt 204. Then, the bearing backings on the material belt 204 are manually hung in the placement racks 510 on the fixed rod 509. The rotation of the second motor 502 causes the placement racks 510 to rotate intermittently, so that the fan 301 on the side plate 3 can air dry different sides of the bearing backings on the placement racks 510, increasing the air drying work of the bearing backings, so as to facilitate the subsequent processing of the bearing backings and increase the processing efficiency of the bearing backings.

[0049] As one implementation method in this embodiment, according to the appendix Figure 6 and 7As shown, the air-drying assembly includes a side plate 3 fixedly installed on one side of the bracket 202. A pair of fans 301 are fixedly installed on the side plate 3. A pair of sleeve blocks 302 are fixedly connected to the rear side of the side plate 3. A limiting rod 303 is movably inserted into the pair of sleeve blocks 302. The top end of the limiting rod 303 is fixedly connected to the top plate 304. A handle 305 is fixedly connected to one side of the top plate 304. An equipment rack 306 is fixedly connected to the other side of the top plate 304. A limiting plate 4 is fixedly connected to the middle of the bottom of the top plate 304. A slot 401 is opened on the limiting plate 4. A stop block 402 is fixedly connected to the side plate 3. A pull rod 403 is movably inserted into the stop block 402. A shaft pin 404 is fixedly connected to the pull rod 403. One end of the pull rod 403 is fixedly connected to the moving block 405. A locking block 406 is fixedly connected to the moving block 405. The locking block 406 is locked in the locking groove 401. A spring 407 is sleeved on the pull rod 403. The two ends of the spring 407 are fixedly connected to one side of the stop block 402 and one side of the moving block 405, respectively. A pair of sliding rods 408 are fixedly connected to one side of the moving block 405. A slider 409 is sleeved on the pair of sliding rods 408. The slider 409 is fixedly installed on the stop block 402.

[0050] Specifically, when the height of the top plate 304 needs to be adjusted, or when fixing rods 509 of different lengths need to be installed, the shaft pin 404 is pulled. The shaft pin 404 is fixedly connected to the pull rod 403. The movement of the shaft pin 404 drives the pull rod 403 to move. A moving block 405 is fixedly connected to one end of the pull rod 403, and a locking block 406 is fixedly connected to the moving block 405. The locking block 406 is locked in the slot 401 by the elastic force of the spring 407. The movement of the pull rod 403 causes the locking block 406 on the moving block 405 to disengage from the slot 401. Then, the handle 305 on the top plate 304 is pulled, so that the height of the equipment rack 306 can be freely adjusted. When the shaft pin 404 is released, the locking block 406 will fix the position of the equipment rack 306 by the elastic force of the spring 407.

[0051] As one implementation method in this embodiment, according to the appendix Figure 8 As shown, the storage assembly includes a docking frame 5 fixedly installed on the equipment rack 306. A pair of clamps 501 are fixedly connected to the docking frame 5. A second motor 502 is fixedly installed on the pair of clamps 501. A main shaft 503 is fixedly connected to the output end of the second motor 502. A half gear 504 is fixedly connected to the main shaft 503. A gear belt 505 meshes with the half gear 504. The two ends of the gear belt 505 are respectively sleeved on the full gear 506. A sleeve 507 is fixedly connected to the full gear 506. The sleeve 507 is rotatably connected inside the equipment rack 306. A threaded hole 508 is opened on the sleeve 507. A fixing rod 509 is threadedly connected inside the threaded hole 508. A placement rack 510 is fixedly connected to the surface of the fixing rod 509.

[0052] Specifically, when it is necessary to rotate the bearing rear section on the placement rack 510, the second motor 502 starts to operate. The operation of the second motor 502 causes the main shaft 503 to rotate. A half gear 504 is fixedly connected to the main shaft 503, and the half gear 504 meshes with the gear belt 505. The rotation of the half gear 504 drives the gear belt 505 to rotate. The two ends of the gear belt 505 are sleeved on the full gear 506. The rotation of the gear belt 505 drives the full gear 506 to rotate. When the half gear 504 rotates to the position where there is no jamming, the placement rack 510 will stop rotating, thus facilitating the intermittent rotation of the placement rack 510, so that the fan 301 can perform the air drying work on the bearing rear section on the placement rack 510.

[0053] The working principle of this invention is as follows: When it is necessary to air dry the bearing backing, the cleaned bearing backing is placed on the material belt 204. The residual water on the bearing backing is drained through the round holes on the material belt 204. Then, the bearing backings on the material belt 204 are manually hung in the placement rack 510 on the fixed rod 509. The rotation of the second motor 502 causes the placement rack 510 to rotate intermittently, which facilitates the air drying of different sides of the bearing backing on the placement rack 510 by the fan 301 on the side plate 3. This increases the air drying work of the bearing backing, which is conducive to the subsequent processing of the bearing backing and increases the processing efficiency of the bearing backing.

[0054] When the height of the top plate 304 needs to be adjusted, or when fixing rods 509 of different lengths need to be installed, the shaft pin 404 is pulled. The shaft pin 404 is fixedly connected to the pull rod 403. The movement of the shaft pin 404 drives the pull rod 403 to move. A moving block 405 is fixedly connected to one end of the pull rod 403, and a locking block 406 is fixedly connected to the moving block 405. The locking block 406 is locked in the slot 401 by the elastic force of the spring 407. The movement of the pull rod 403 causes the locking block 406 on the moving block 405 to disengage from the slot 401. Then, the handle 305 on the top plate 304 is pulled, so that the height of the equipment rack 306 can be freely adjusted. When the shaft pin 404 is released, the locking block 406 will fix the position of the equipment rack 306 by the elastic force of the spring 407.

[0055] When it is necessary to rotate the bearing rear section on the placement rack 510, the second motor 502 starts to operate. The operation of the second motor 502 causes the main shaft 503 to rotate. A half gear 504 is fixedly connected to the main shaft 503, and the half gear 504 meshes with the gear belt 505. The rotation of the half gear 504 drives the gear belt 505 to rotate. The two ends of the gear belt 505 are sleeved on the full gear 506. The rotation of the gear belt 505 drives the full gear 506 to rotate. When the half gear 504 rotates to the position where there is no jamming, the placement rack 510 will stop rotating, thus facilitating the intermittent rotation of the placement rack 510, so that the fan 301 can perform the air drying work on the bearing rear section on the placement rack 510.

[0056] like Figure 9 As shown, the present invention also provides a repair process for the rear bearing of railway freight cars, comprising the following steps:

[0057] S1. Ultrasonic cleaning: Place the rear bumper to be inspected into an ultrasonic cleaner, add a measured amount of metal degreasing and rust-removing cleaning agent, immerse it in water and boil it with ultrasound; the cleaning water temperature is 60℃-80℃, and the boiling time is 2-6 hours.

[0058] S2. Drying: Place the rear panel, which has been boiled and washed, on the automatic air-drying conveyor for air drying. After one side is dried, the other side is dried.

[0059] S3. Sandblasting and rust removal: Use a quartz sandblasting machine to clean the surface of the rear bumper after cleaning and drying, achieving an oil-free and rust-free state; the quartz sand particle size for cleaning is 40-50 mesh, and the cleaning time is 15-30 minutes.

[0060] S4. Inner Diameter Measurement: After sandblasting, move the rear bumper onto the measuring device and use an inside micrometer to measure the d-value of the inner ring of the rear bumper. If it meets the standard size, it can proceed directly to surface phosphating treatment. If it does not meet the standard size, it will undergo cold welding additive processing. The standard size is 165mm to 165.04mm.

[0061] S5. Cold welding additive manufacturing: Place the rear guard with out-of-tolerance inner ring on the chuck of the cold welding machine, fix it, and start the equipment to perform cold welding on the inner ring of the rear guard; the welding speed is 4.6-5.9mm / s, the welding current is 170-200A, and the material used in the railway freight car bearing rear guard repair device is the same as the material of the rear guard.

[0062] S6. CNC Turning: Move the back gauge onto the turning machine, place the cold-welded back gauge on the CNC lathe chuck, and re-turn it to achieve its usable dimensions; the inner diameter cutting dimension is 165mm to 165.04mm. Cold welding additive manufacturing and CNC turning are not shown in the drawing and need to be performed by the operator according to the steps.

[0063] S7. Pickling and Phosphating: Place the qualified rear bumper into the phosphating solution pool to phosphate the surface of the rear bumper; the temperature of the phosphating solution is 20℃ to 40℃, and the soaking time is 15-20 minutes.

[0064] S8. Cleaning and drying: Clean and dry the pickled and phosphated workpieces; the cleaning method is to suspend the phosphated workpieces in the solution and then rinse them with clean water.

[0065] S9. Applying oil to seal the phosphated layer: Applying oil to seal the phosphated back panel; in step S9, the oil sealing method involves immersing the cleaned phosphated back panel in the oil, then taking it out and hanging it. If no oil drips, the oil sealing is complete.

[0066] S10. Inspection: The oil-sealed rear guard shall be inspected and a comprehensive inspection test shall be conducted to ensure that the product quality meets the requirements of railway freight cars for bearing rear guards.

[0067] The S1 further includes: placing the collected bearing back sections one by one on the shelf 110, and then connecting the lifting lugs 115 through the hoisting device, so that the entire fixed frame 105 enters the acoustic cleaning box 104 to perform ultrasonic cleaning, wherein a certain amount of metal degreasing and rust removal cleaning agent is added inside the acoustic cleaning box 104.

[0068] The S2 further includes: the cleaned bearing backing is placed on the material belt 204, the residual liquid in the bearing backing is discharged through the round hole, and then the bearing backing is manually hung on the placement rack 510. The fan 301 and the second motor 502 are used in conjunction to air dry different sides of the bearing backing on the placement rack 510.

[0069] The S4 further includes: after rust removal, placing the rear guard with the out-of-tolerance inner ring on the chuck of the cold welding machine, fixing it, starting the equipment, and cold welding the inner ring of the rear guard.

[0070] This invention addresses the repair of bearing backstops using cold welding additive manufacturing technology. Cold welding technology offers advantages such as a small heat-affected zone, low heat input, and welding temperatures significantly lower than conventional welding. Furthermore, cold welding exhibits high hardness, adhesion, and strength, along with minimal shrinkage, effectively preventing various chemical reactions, physical stresses, and mechanical stresses. Consequently, it ensures welding quality. Therefore, the cold welding additive manufacturing process is adopted as a key upgrade step in the bearing backstop repair process, thereby resolving issues related to bearing backstop wear, deformation, and dimensional deviations.

[0071] The repaired rear window undergoes dimensional inspection and testing to ensure safety during use. New processes are adopted, and the rear window repair workflow is optimized to guarantee product quality after additive manufacturing, improve parts repair rates, and enable the reuse of repaired rear windows.

[0072] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A railway car bearing retainer repair system, characterized by, The device table (1) is characterized in that universal wheels (101) are fixedly installed at the bottom corners of the device table (1), a box door (102) is rotatably connected to the surface of the device table (1), a perspective glass (103) is arranged on the surface of the box door (102), a sound wave cleaning box (104) is arranged in the device table (1), a fixing frame (105) is arranged in the sound wave cleaning box (104), a handle (106) is fixedly connected to the fixing frame (105), a connecting frame (107) is fixedly connected to the bottom end of the fixing frame (105), a bottom plate (108) is fixedly connected to the bottom end of the connecting frame (107), a cross rod (109) is arranged on the fixing frame (105), a storage rack (110) is threadedly connected to the cross rod (109), an installation plate (113) is fixedly installed on the fixing frame (105) through bolts (112), a fixed plate (114) is fixedly connected to the installation plate (113), and a lifting lug (115) is threadedly connected to the middle end position of the fixed plate (114); The device table (1) is characterized in that universal wheels (101) are fixedly installed at the bottom corners of the device table (1), a box door (102) is rotatably connected to the surface of the device table (1), a perspective glass (103) is arranged on the surface of the box door (102), a sound wave cleaning box (104) is arranged in the device table (1), a fixing frame (105) is arranged in the sound wave cleaning box (104), a handle (106) is fixedly connected to the fixing frame (105), a connecting frame (107) is fixedly connected to the bottom end of the fixing frame (105), a bottom plate (108) is fixedly connected to the bottom end of the connecting frame (107), a cross rod (109) is arranged on the fixing frame (105), a storage rack (110) is threadedly connected to the cross rod (109), an installation plate (113) is fixedly installed on the fixing frame (105) through bolts (112), a fixed plate (114) is fixedly connected to the installation plate (113), and a lifting lug (115) is threadedly connected to the middle end position of the fixed plate (114); The device table (1) is characterized in that universal wheels (101) are fixedly installed at the bottom corners of the device table (1), a box door (102) is rotatably connected to the surface of the device table (1), a perspective glass (103) is arranged on the surface of the box door (102), a sound wave cleaning box (104) is arranged in the device table (1), a fixing frame (105) is arranged in the sound wave cleaning box (104), a handle (106) is fixedly connected to the fixing frame (105), a connecting frame (107) is fixedly connected to the bottom end of the fixing frame (105), a bottom plate (108) is fixedly connected to the bottom end of the connecting frame (107), a cross rod (109) is arranged on the fixing frame (105), a storage rack (110) is threadedly connected to the cross rod (109), an installation plate (113) is fixedly installed on the fixing frame (105) through bolts (112), a fixed plate (114) is fixedly connected to the installation plate (113), and a lifting lug (115) is threadedly connected to the middle end position of the fixed plate (114); The device table (1) is characterized in that universal wheels (101) are fixedly installed at the bottom corners of the device table (1), a box door (102) is rotatably connected to the surface of the device table (1), a perspective glass (103) is arranged on the surface of the box door (102), a sound wave cleaning box (104) is arranged in the device table (1), a fixing frame (105) is arranged in the sound wave cleaning box (104), a handle (106) is fixedly connected to the fixing frame (105), a connecting frame (107) is fixedly connected to the bottom end of the fixing frame (105), a bottom plate (108) is fixedly connected to the bottom end of the connecting frame (107), a cross rod (109) is arranged on the fixing frame (105), a storage rack (110) is threadedly connected to the cross rod (109), an installation plate (113) is fixedly installed on the fixing frame (105) through bolts (112), a fixed plate (114) is fixedly connected to the installation plate (113), and a lifting lug (115) is threadedly connected to the middle end position of the fixed plate (114); ​ The bottom of the top plate (304) is fixedly connected with a limiting plate (4), the limiting plate (4) is provided with a clamping groove (401), the side plate (3) is fixedly connected with a stop block (402), the stop block (402) is movably provided with a pull rod (403), the pull rod (403) is fixedly connected with a shaft pin (404), one end of the pull rod (403) is fixedly connected with a moving block (405), the moving block (405) is fixedly connected with a clamping block (406), and the clamping block (406) is clamped in the clamping groove (401); The pull rod (403) is provided with a spring (407), and the two ends of the spring (407) are fixedly connected with one side of the stop block (402) and one side of the moving block (405); one side of the moving block (405) is fixedly connected with a pair of sliding rods (408), a pair of sliding rods (408) are provided with a sliding block (409), and the sliding block (409) is fixedly installed on the stop block (402); The storage assembly comprises a butt joint frame (5) fixedly installed on the equipment rack (306), a pair of clamps (501) are fixedly connected to the butt joint frame (5), a second motor (502) is fixedly installed on the pair of clamps (501), the output end of the second motor (502) is fixedly connected with a main shaft (503), and a half gear (504) is fixedly connected to the main shaft (503); the half gear (504) is meshed with a gear belt (505), the two ends of the gear belt (505) are sleeved on a full gear (506), the full gear (506) is fixedly connected with a sleeve (507), the sleeve (507) is rotatably connected in the equipment rack (306), the sleeve (507) is provided with a threaded hole (508), the inside of the threaded hole (508) is threadedly connected with a fixing rod (509), and the surface of the fixing rod (509) is fixedly connected with a placing rack (510).

2. A process for repairing a railway wagon bearing rear stop based on the system of claim 1, comprising the following steps: S1, ultrasonic cleaning: the to-be-repaired rear stop is placed in an ultrasonic cleaning machine, a quantitative metal oil and rust removing cleaning agent is added, and the rear stop is immersed in water and cooked and washed by ultrasonic waves; the collected bearing rear stops are placed one by one on the storage rack, then the lifting lugs are connected by the lifting device, so that the fixing frame as a whole enters the inside of the ultrasonic cleaning box for cleaning by ultrasonic waves, and a quantitative metal oil and rust removing cleaning agent is added in the ultrasonic cleaning box (104); S2, drying: the water-cooked and cleaned rear stop is placed on an automatic air-drying conveying device for air-drying operation, and after one side is dried, the other side is dried; the cleaned bearing rear stop is placed on the material belt, the residual liquid of the bearing rear stop is discharged through the round hole, then the bearing rear stop is hung on the placing rack by manual operation, and the air dryer and the second motor are used in cooperation to dry different sides of the bearing rear stop on the placing rack. S3, sanding and rust removal: use quartz sand blasting machine to clean and dry the rear after cleaning the surface, to achieve the state of no oil and no rust; S4, inner diameter measurement: after sanding the rear, move to the measurer, use the inner diameter micrometer to measure the rear inner ring d value size, if it meets the standard size, directly enter the surface phosphating treatment, if it does not meet the standard, carry out cold welding additive treatment; after rust removal, place the inner ring of the rear that exceeds the standard on the chuck of the cold welding machine, fix it and start the equipment, cold weld the rear inner ring; S5, cold welding additive: place the inner ring of the rear that exceeds the standard on the chuck of the cold welding machine, fix it and start the equipment, cold weld the rear inner ring; S6, numerical control turning: place the rear on the turning machine, place the cold welded rear on the chuck of the numerical control lathe and turn it again to achieve the size of use; S7, pickling and phosphating: place the rear that meets the requirements into the phosphating liquid pool and carry out phosphating treatment on the surface of the rear; S8, cleaning and drying: clean and dry the workpiece after pickling and phosphating; S9, oil sealing and phosphating layer: use sealing oil to seal and close the phosphated rear; S10, detection: detect the rear with oil seal, comprehensive test, the product quality meets the requirements of railway freight car for bearing rear.

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