Rail edge and end face trimming combined grinding device

Abstract

The present application relates to the technical field of railway maintenance, and discloses a steel rail fat edge removing and end face trimming composite polishing device, which comprises a travelling chassis, a polisher and a transmission rod are arranged below the travelling chassis, an angle control rod is arranged outside the polisher, blowers are installed on the bottom surfaces of the travelling chassis on the two sides of the polisher, a calibration motor and a positioning motor are sequentially arranged above the polisher, and a controller and a passenger seat are arranged on one side of the travelling chassis. The controller is used for controlling the start and stop of the polisher, the blowers, the calibration motor and the positioning motor in real time, and the angle control rod is used for controlling the inclination angle of the polisher. The device not only needs to be operated by a single person, but also does not need to be operated by standing and bending like a hand-held grinder or a track-type turnout polisher. The device not only maintains the function of single-person operation, but also reduces the burden of manual work, improves the efficiency of maintenance work, and solves the disadvantages of the hand-held grinder and the track-type turnout polisher.

Description

Technical Field

[0001] This invention relates to the field of railway maintenance technology, and in particular to a composite grinding device for removing rail burrs and finishing the end face. Background Technology

[0002] Rail thickening occurs when the steel undergoes plastic flow due to the long-term pressure and compression of the rail head by train wheels, resulting in a metallic bulge and rolled edge on the side of the rail head. It commonly appears on small-radius curves, turnouts, and braking sections, especially on heavy-load lines. Rail thickening can cause false contact of turnouts, abnormal track gauge, promote rail fatigue cracks, hinder thermal expansion and contraction, and cause track hazards due to falling metal fragments, accelerating wheel-rail wear. As the thickening continues to increase, it can also compress rail fasteners, clog railside drainage gaps, and even jam wheel flanges, increasing the risk of wheel-rail impact. Generally, it is removed by grinding with grinding machines during track maintenance windows. Flame cutting is prohibited, as high-temperature burning will damage the metallographic structure of the rail and reduce its service life. After grinding, the edges of the rail head must be rounded to restore the standard rail profile.

[0003] Among the main methods for treating thick rail edges, grinding is the only permitted method. High temperatures from flames or plasmas harden the rail surface, producing hard and brittle martensite that easily leads to cracks or rail breakage. Therefore, gas cutting or plasma cutting is explicitly prohibited. In railway braking areas and sections with small-radius curves, hand-held grinders or rail-mounted turnout grinders are generally used. The former is manually operated, which is not only inefficient but also relies entirely on experience to determine the profile. The latter requires two people to operate and is not economically viable for single welds and isolated small sections of thick rail edges. Therefore, an integrated grinding device is needed that can reduce manual labor while ensuring efficiency. Summary of the Invention

[0004] The present invention aims to provide a composite grinding device for removing rail burrs and finishing the end face, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite grinding device for removing rail burrs and finishing the end face, comprising a trolley chassis, a grinding machine and a transmission rod arranged below the trolley chassis, an angle control rod arranged outside the grinding machine, blowers installed on the bottom surfaces of both sides of the trolley chassis located on the grinding machine, a calibration motor and a positioning motor arranged sequentially above the grinding machine, and a controller and a passenger seat arranged on one side of the trolley chassis.

[0006] Preferably, the bottom surface of the vehicle chassis is rotatably connected to two seats, the seats are equipped with load-bearing steel wheels, the bottom surface of the vehicle chassis is equipped with a drive motor, and the output end of the drive motor is equipped with a drive wheel.

[0007] Preferably, four pneumatic cylinders are installed on the outer surface of the vehicle chassis, and a pressure rod is fixedly installed at the output end of each pneumatic cylinder. The outer surface of the pressure rod is slidably connected to the inner wall of the vehicle chassis. A wheel seat is installed at the bottom end of the pressure rod, and a grinding roller is fixedly connected to the inner side wall of the wheel seat.

[0008] Preferably, a directional rail is fixedly installed on the outer surface of the vehicle chassis, a directional wheel is slidably connected to the outer surface of the directional rail, a support frame is rotatably connected to the outer surface of the directional wheel, and a hydraulic seat is fixedly installed on the outer surface of the support frame.

[0009] Preferably, the positioning motor is fixedly installed on the outer surface of the vehicle chassis, and a threaded rod is fixedly installed at the output end of the positioning motor. A transmission frame is threadedly connected to the outer surface of the threaded rod, and the outer surface of the transmission frame is fixedly connected to the outer surface of the support frame.

[0010] Preferably, a directional sleeve is fixedly installed on the bottom surface of the support frame, a directional rod is slidably connected to the inner wall of the directional sleeve, a positioning frame is fixedly installed at the bottom end of the directional rod, and the output end of the hydraulic seat is fixedly connected to the outer surface of the positioning frame.

[0011] Preferably, the calibration motor is fixedly installed on the inner wall of the positioning frame, and a threaded rod is fixedly installed at the output end of the calibration motor. One end of the threaded rod is rotatably connected to the inner wall of the positioning frame, and a calibration rod is fixedly installed on the inner wall of the positioning frame.

[0012] Preferably, the outer surface of the calibration rod is slidably connected to a movable seat, the inner wall of the movable seat is threadedly connected to the outer surface of the threaded rod, the grinder is rotatably connected to the inner side wall of the movable seat, and a grinding disc is detachably installed at the output end of the grinder.

[0013] Preferably, a connecting rod is fixedly installed on the bottom surface of the positioning frame, and a positioning wheel is rotatably connected to the bottom end of the connecting rod. The outer surface of the positioning wheel is in close contact with the outer side wall of the rail.

[0014] Preferably, an extension frame is fixedly connected to the outer surface of the positioning frame, the inner sidewall of the extension frame is rotatably connected to the outer surface of the angle control rod, a top seat is fixedly installed at the bottom end of the angle control rod, the inner sidewall of the top seat is in close contact with one end of the transmission rod, the outer surface of the transmission rod penetrates the inner side of the positioning frame, a universal joint is rotatably connected to one end of the transmission rod, an inclined rod is rotatably connected to the inner sidewall of the universal joint, a fixed seat is rotatably connected to the outer surface of the inclined rod, and the fixed seat is fixedly installed on the outer surface of the grinder.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention utilizes the coordination between a traveling chassis, a grinding machine, an angle control lever, a transmission rod, a blower, a calibration motor, a positioning motor, a controller, and a passenger seat. The operator can sit in the passenger seat and control the start and stop of the grinding machine, blower, calibration motor, and positioning motor in real time via the controller. The angle control lever can also control the tilt angle of the grinding machine. When the traveling chassis is moving on the rails, the calibration motor and positioning motor can precisely move the grinding machine to a position close to the rails. Subsequently, the tilt angle of the grinding machine can be controlled via the angle control lever and the transmission rod, and the blower... The machine ensures airflow near the rails and the grinder, and the two blowers blow in the same direction, ensuring the seating area is always upwind. This reduces the contact between the operator's feet and the sparks generated during grinding. Therefore, this equipment can be operated by a single person during edge removal, and the operator does not need to stand and bend over as with a handheld grinder or a rail-mounted turnout grinder. It not only maintains the function of single-person operation, but also reduces the burden on workers, improves the efficiency of maintenance work, and solves the drawbacks of handheld grinders and rail-mounted turnout grinders.

[0016] 2. This invention utilizes the cooperation between the seat, load-bearing steel wheels, chassis, controller, and passenger seat. The load-bearing steel wheels and seat provide the necessary load-bearing function for the chassis, while the drive motor provides power to the chassis through the drive wheels. The start and stop of the power is controlled by the controller, enabling the entire device to be driven by a single person. This allows the device to operate flexibly in braking sections with multiple isolated short sections of thick edges.

[0017] 3. This invention, through the cooperation of the grinding roller, grinding machine, positioning motor, calibration motor, hydraulic base, and angle control rod, can complete multiple maintenance operations in one go, including rail head edge removal, rail surface rust removal, rail end face shaping, and rail head arc profile restoration. The positioning wheel remains in close contact with the rail sidewall throughout the process, and the calibration motor provides minor alignment correction, ensuring that the grinding disc of the grinding machine is less prone to deviation in the grinding trajectory on curves and turnout sections. The entire grinding process uses only mechanical cold processing, eliminating the problems of martensitic embrittlement and fatigue crack initiation on the rail surface caused by high-temperature cutting such as flame or plasma. Dual-sided directional blowers blow metal debris and grinding sparks backward, preventing iron filings from accumulating and interfering with grinding accuracy. A single unit can be adapted to all sections prone to edge defects, including heavy-load lines, small-radius curves, braking sections, and various turnouts. This multi-purpose machine reduces the number of tools transported on-site and effectively shortens the comprehensive maintenance time within railway maintenance windows. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the entire invention from another perspective; Figure 3 This is a schematic diagram of the overall bottom of the present invention after the rails have been removed; Figure 4 This is a schematic diagram of the surface structure of the vehicle chassis of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the vehicle chassis of the present invention; Figure 6 This is a schematic diagram of the support frame and its auxiliary structures of the present invention; Figure 7 This is a schematic diagram of the positioning frame and its auxiliary structures according to the present invention; Figure 8 This is a schematic diagram of the angle control lever transmission structure of the present invention.

[0019] In the diagram: 1. Overhead chassis; 2. Grinding machine; 3. Transmission rod; 4. Angle control rod; 5. Blower; 6. Calibration motor; 7. Positioning motor; 8. Controller; 9. Seat; 10. Seat; 11. Load-bearing steel wheel; 12. Drive motor; 13. Drive wheel; 14. Pneumatic cylinder; 15. Pressure rod; 16. Wheel seat; 17. Grinding roller; 18. Guide rail; 19. Guide wheel; 20. Bearing frame; 21. Hydraulic seat; 22. Transmission frame one; 23. Guide sleeve; 24. Guide rod; 25. Positioning frame; 26. Threaded rod two; 27. Calibration rod; 28. Movable seat; 29. ​​Connecting rod; 30. Positioning wheel; 31. Extension frame; 32. Top seat; 33. Universal seat; 34. Tilt rod; 35. Fixed seat; 36. Threaded rod one. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] This invention provides, for example Figures 1 to 8The illustrated composite grinding device for removing burr edges and finishing the end face of rails includes a traveling chassis 1. A grinding machine 2 is installed below the traveling chassis 1. An angle control lever 4 and a transmission rod 3 are installed on the outside of the grinding machine 2. Blowers 5 are installed on the bottom surfaces of both sides of the traveling chassis 1 located on the grinding machine 2. A calibration motor 6 and a positioning motor 7 are sequentially installed above the grinding machine 2. A controller 8 and a seating seat 9 are installed on one side of the traveling chassis 1. During use, the operator can sit on the seating seat 9 and control the start and stop of the grinding machine 2, blowers 5, calibration motor 6, and positioning motor 7 in real time through the controller 8. The tilt angle of the grinding machine 2 can also be controlled through the angle control lever 4. When the traveling chassis 1 travels on the rail, the calibration motor 6 and positioning motor 7 can be used to control the movement of the grinding machine 2. Machine 7 precisely moves the grinder 2 to a position close to the rail. Then, the tilt angle of the grinder 2 can be controlled by the angle control lever 4 and the transmission lever 3. The blower 5 ensures airflow near the rail and the grinder 2. Moreover, the two blowers 5 have the same airflow direction, ensuring that the seat 9 always remains upwind, reducing the contact between the operator's feet and the sparks generated by grinding. Therefore, this equipment can be operated by a single person during the removal of burrs. At the same time, the operator does not need to stand and bend over to operate as with a hand-held grinder or a rail-mounted turnout grinder 2. It not only maintains the function of single-person operation, but also reduces the burden of manpower, improves the efficiency of maintenance work, and solves the drawbacks of hand-held grinders and rail-mounted turnout grinders 2.

[0022] Two seats 10 are rotatably connected to the bottom surface of the overhead chassis 1. Load-bearing steel wheels 11 are installed inside the seats 10. A drive motor 12 is installed on the bottom surface of the overhead chassis 1. A drive wheel 13 is installed at the output end of the drive motor 12. The load-bearing steel wheels 11 and seats 10 provide the necessary load-bearing function for the overhead chassis 1. At the same time, the drive motor 12 can provide power to the overhead chassis 1 through the drive wheel 13. The start and stop of its power is controlled by the controller 8, which enables the entire equipment to be driven by a single person and allows the equipment to operate flexibly in braking sections with multiple isolated short sections of thick edges.

[0023] Four pneumatic cylinders 14 are installed on the outer surface of the crane chassis 1. A pressure rod 15 is fixedly installed at the output end of the pneumatic cylinder 14. The outer surface of the pressure rod 15 is slidably connected to the inner wall of the crane chassis 1. A wheel seat 16 is installed at the bottom end of the pressure rod 15. A grinding roller 17 is fixedly connected to the inner side wall of the wheel seat 16. When the surface of the rail needs to be ground, the pneumatic cylinder 14 can be activated to apply downward pressure to the pressure rod 15, so that the grinding roller 17 rubs against the surface of the rail. The pressure applied by the pneumatic cylinder 14 can be controlled to control the friction force between the grinding roller 17 and the rail as needed for the grinding force.

[0024] A directional rail 18 is fixedly installed on the outer surface of the chassis 1. A directional wheel 19 is slidably connected to the outer surface of the directional rail 18. A support frame 20 is rotatably connected to the outer surface of the directional wheel 19. A hydraulic seat 21 is fixedly installed on the outer surface of the support frame 20. The directional rail 18 and the directional wheel 19 can provide directional guidance for the support frame 20 and the positioning frame 25 below it.

[0025] The positioning motor 7 is fixedly installed on the outer surface of the chassis 1. The output end of the positioning motor 7 is fixedly installed with a threaded rod 36. The outer surface of the threaded rod 36 is threadedly connected to the transmission frame 22. The outer surface of the transmission frame 22 is fixedly connected to the outer surface of the support frame 20. The positioning motor 7 can drive the transmission frame 22 to move through the threaded rod 36. The transmission frame 22 can drive the support frame 20 to slide on the directional rail 18 through the directional wheel 19.

[0026] A directional sleeve 23 is fixedly installed on the bottom surface of the support frame 20. A directional rod 24 is slidably connected to the inner wall of the directional sleeve 23. A positioning frame 25 is fixedly installed at the bottom end of the directional rod 24. The output end of the hydraulic seat 21 is fixedly connected to the outer surface of the positioning frame 25. The hydraulic seat 21 can drive the positioning frame 25 to move up and down with the support frame 20 as the fixed point. The directional sleeve 23 and the directional rod 24 can reduce the phenomenon of lateral swaying during the up and down movement of the positioning frame 25.

[0027] The calibration motor 6 is fixedly installed on the inner wall of the positioning frame 25. The output end of the calibration motor 6 is fixedly installed with a threaded rod 26. One end of the threaded rod 26 is rotatably connected to the inner wall of the positioning frame 25. The inner wall of the positioning frame 25 is fixedly installed with a calibration rod 27. Both the calibration motor 6 and the positioning motor 7 are servo motors that can rotate forward and backward, and are both controlled by the controller 8.

[0028] The outer surface of the calibration rod 27 is slidably connected to the movable seat 28. The inner wall of the movable seat 28 is threadedly connected to the outer surface of the threaded rod 26. The grinder 2 is rotatably connected to the inner wall of the movable seat 28. The output end of the grinder 2 is detachably equipped with a grinding disc. The calibration motor 6 can drive the positioning frame 25 through the threaded rod 26, so that the grinding disc on the grinder 2 can be accurately moved to the edge of the rail.

[0029] A connecting rod 29 is fixedly installed on the bottom surface of the positioning frame 25. A positioning wheel 30 is rotatably connected to the bottom end of the connecting rod 29. The outer surface of the positioning wheel 30 is in close contact with the outer side wall of the rail. The positioning wheel 30 can adhere to the outer side of the rail during grinding. Even in the curved section, the upper surface of the rail can still be ground slowly during the low speed of the vehicle chassis 1.

[0030] An extension frame 31 is fixedly connected to the outer surface of the positioning frame 25. The inner wall of the extension frame 31 is rotatably connected to the outer surface of the angle control rod 4. A top seat 32 is fixedly installed at the bottom end of the angle control rod 4. The inner wall of the top seat 32 is in close contact with one end of the transmission rod 3. The outer surface of the transmission rod 3 penetrates the inner side of the positioning frame 25. A universal joint 33 is rotatably connected to one end of the transmission rod 3. An inclined rod 34 is rotatably connected to the inner wall of the universal joint 33. A fixed seat 35 is rotatably connected to the outer surface of the inclined rod 34. The fixed seat 35 is fixedly installed on... When the angle of the grinder 2 needs to be adjusted, the angle control lever 4 can be pulled. The angle control lever 4 can push the transmission rod 3 through the top seat 32. The transmission rod 3 can push the tilting rod 34 through the universal seat 33. In turn, the tilting rod 34 drives the fixed seat 35 to push the grinder 2. A rotary spring is installed at the rotation connection point between the grinder 2 and the movable seat 28. After the angle control lever 4 is released, the rotary spring can reset and drive the grinder 2, the angle control lever 4, the transmission rod 3 and the tilting rod 34 back to their original positions.

[0031] Working principle: The operator sits on the seat 9 and centrally controls all the machine's components through the controller 8. The equipment integrates walking, precise positioning, posture adjustment, composite grinding, and dust removal functions, allowing a single person to complete the removal of rail burrs and end-face finishing work while seated. Railway line maintenance can only be carried out during limited nighttime maintenance windows, which are short and involve concentrated tasks. This integrated equipment does not require on-site splicing and assembly and can start working immediately after being put on the track, significantly reducing the valuable maintenance window time consumed by equipment layout and debugging. During the walking operation, the drive motor 12 drives the drive wheel 13 to rotate, and the load-bearing steel wheel 11 supports the overall weight of the train chassis 1, driving the whole machine to move longitudinally along the rail. It can flexibly handle small sections of burrs and rail joint end-face defects scattered on the line. It can also smoothly shuttle through the scattered defect points of turnouts and short braking sections on heavy-load lines, without bumping fasteners or scratching the rail surface like when carrying hand-held tools. It saves the manpower consumption of multiple people transporting and pushing the equipment and avoids the labor burden such as lumbar muscle strain caused by long-term bending over when carrying hand-held tools. Lateral coarse positioning relies on the positioning motor 7 to drive the threaded rod 36 to rotate, which in turn drives the transmission frame 22 and the bearing frame 20 to move laterally along the directional rail 18 and the directional wheel 19, moving the entire grinding unit to the rail working area. The servo motor can store standard displacement parameters in advance, and repeated manual calibration is not required for repeated operations on the same type of rail. The hydraulic base 21 drives the positioning frame 25 to achieve vertical lifting and lowering along the directional sleeve 23 and directional rod 24, adjusting the overall height of the grinding mechanism. The positioning wheel 30 below the positioning frame 25 fits against the outer wall of the rail and continuously limits the position when working on straight or curved tracks. Even if there is a deviation in the rail direction of a small radius curve, it can ensure that the grinding disc is stably aligned with the side of the rail head and the end face of the rail, completely eliminating the problems of grinding deviation and local over-grinding. Precise fine-tuning and grinding angle adjustment are accomplished by two mechanisms: calibration motor 6 and angle control lever 4. Calibration motor 6 drives threaded rod 26 to rotate, causing movable seat 28 to move slightly laterally along calibration rod 27, achieving micro-alignment calibration of grinding machine 2. Manually moving angle control lever 4 pushes transmission rod 3 via top seat 32, and then pushes and pulls fixed seat 35 with the help of universal seat 33 and tilting rod 34, driving grinding machine 2 to rotate, thereby changing the tilt angle of the grinding disc to adapt to two different grinding conditions: rail side thick edge and rail end face. After releasing angle control lever 4, the matching rotary spring can automatically reset grinding machine 2 to the initial angle, resulting in a higher operational error tolerance.

[0032] The equipment features two grinding processes to achieve composite finishing: the first is a rough grinding process, where the controller 8 regulates the output pressure of the pneumatic cylinder 14, and the pressure rod 15 applies downward pressure, causing the grinding roller 17 on the wheel seat 16 to fit against the rail surface. By adjusting the air pressure, the grinding force is precisely controlled, quickly removing rail surface rust and surface protrusion defects. The second is a fine grinding process, where the grinder 2 drives the detachable grinding disc at the end to rotate at high speed. The grinding disc adopts a quick-release structure, and different grit grinding discs can be quickly replaced inside the window. It uses mechanical grinding to cut the metal fat extruded from the side of the rail head, and simultaneously repairs the excess protruding metal on the end face of the rail at the rail joint. The rail head edges are ground into a standard arc in one go, eliminating the need for secondary re-grinding. No flame or plasma cutting is used throughout the process, preventing the quenching of the rail surface to produce brittle and hard martensite and induce fatigue cracks, thus ensuring the long-term structural strength of the rail. During operation, the blowers 5 on both sides of the overhead chassis 1 start simultaneously, supporting multi-level air volume adjustment. When the thick edge is heavy, the air volume is increased, and when the fine end face is trimmed, the air volume is reduced. The unified air direction blows the metal dust and sparks generated by grinding towards the rear of the equipment, so that the seat 9 is always upwind, avoiding the operator being burned by sparks and iron filings. At the same time, it blows away residual debris on the surface of the rail, keeps the grinding contact surface clean, and reduces the safety hazards caused by metal fragments falling on the line. All movements of the machine, including walking, positioning, lifting, angle adjustment, grinding, and purging, can be controlled by the controller 8. Only one person is needed to operate it. It can handle continuous thick edges on curves as well as scattered rail end face defects. One set of equipment covers all scenarios of defects in heavy-load main lines, small-radius curves, braking sections, and various turnouts. There is no need to configure multiple special grinding tools, which reduces the equipment procurement, storage, and maintenance costs of the track maintenance department. It effectively makes up for the shortcomings of traditional hand-held grinders, which have low grinding efficiency, ordinary rail-mounted turnout grinders that require multiple operators, and those applicable to only one working condition.

[0033] 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 composite grinding device for removing rail burrs and finishing end faces, characterized in that: The vehicle includes a chassis (1), a grinder (2) and a transmission rod (3) are provided below the chassis (1), an angle control rod (4) is provided outside the grinder (2), blowers (5) are installed on the bottom surfaces of the chassis (1) on both sides of the grinder (2), a calibration motor (6) and a positioning motor (7) are arranged in sequence above the grinder (2), and a controller (8) and a passenger seat (9) are provided on one side of the chassis (1).

2. The composite grinding device for removing rail burrs and finishing end faces according to claim 1, characterized in that: The bottom surface of the vehicle chassis (1) is rotatably connected to two seats (10). The interior of the seats (10) is equipped with load-bearing steel wheels (11). The bottom surface of the vehicle chassis (1) is equipped with a drive motor (12). The output end of the drive motor (12) is equipped with a drive wheel (13).

3. The composite grinding device for removing rail burrs and finishing end faces according to claim 1, characterized in that: Four pneumatic cylinders (14) are installed on the outer surface of the vehicle chassis (1). A pressure rod (15) is fixedly installed at the output end of the pneumatic cylinder (14). The outer surface of the pressure rod (15) is slidably connected to the inner wall of the vehicle chassis (1). A wheel seat (16) is installed at the bottom end of the pressure rod (15). A grinding roller (17) is fixedly connected to the inner side wall of the wheel seat (16).

4. The composite grinding device for removing rail burrs and finishing end faces according to claim 1, characterized in that: The outer surface of the vehicle chassis (1) is fixedly mounted with a directional rail (18), the outer surface of the directional rail (18) is slidably connected with a directional wheel (19), the outer surface of the directional wheel (19) is rotatably connected with a support frame (20), and the outer surface of the support frame (20) is fixedly mounted with a hydraulic seat (21).

5. The composite grinding device for removing rail burrs and finishing end faces according to claim 4, characterized in that: The positioning motor (7) is fixedly installed on the outer surface of the vehicle chassis (1). A threaded rod (36) is fixedly installed at the output end of the positioning motor (7). A transmission frame (22) is threadedly connected to the outer surface of the threaded rod (36). The outer surface of the transmission frame (22) is fixedly connected to the outer surface of the support frame (20).

6. The composite grinding device for removing rail burrs and finishing end faces according to claim 4, characterized in that: The bottom surface of the support frame (20) is fixedly installed with a directional sleeve (23), and a directional rod (24) is slidably connected to the inner wall of the directional sleeve (23). A positioning frame (25) is fixedly installed at the bottom end of the directional rod (24), and the output end of the hydraulic seat (21) is fixedly connected to the outer surface of the positioning frame (25).

7. The composite grinding device for removing rail burrs and finishing end faces according to claim 6, characterized in that: The calibration motor (6) is fixedly installed on the inner wall of the positioning frame (25). A threaded rod (26) is fixedly installed at the output end of the calibration motor (6). One end of the threaded rod (26) is rotatably connected to the inner wall of the positioning frame (25). A calibration rod (27) is fixedly installed on the inner wall of the positioning frame (25).

8. The composite grinding device for removing rail burrs and finishing end faces according to claim 7, characterized in that: The outer surface of the calibration rod (27) is slidably connected to a movable seat (28). The inner wall of the movable seat (28) is threadedly connected to the outer surface of the threaded rod (26). The grinder (2) is rotatably connected to the inner wall of the movable seat (28). The output end of the grinder (2) is detachably equipped with a grinding disc.

9. The composite grinding device for removing rail burrs and finishing end faces according to claim 6, characterized in that: A connecting rod (29) is fixedly installed on the bottom surface of the positioning frame (25), and a positioning wheel (30) is rotatably connected to the bottom end of the connecting rod (29). The outer surface of the positioning wheel (30) is in close contact with the outer wall of the rail.

10. The composite grinding device for removing rail burrs and finishing end faces according to claim 6, characterized in that: An extension frame (31) is fixedly connected to the outer surface of the positioning frame (25). The inner wall of the extension frame (31) is rotatably connected to the outer surface of the angle control rod (4). A top seat (32) is fixedly installed at the bottom end of the angle control rod (4). The inner wall of the top seat (32) is in close contact with one end of the transmission rod (3). The outer surface of the transmission rod (3) penetrates the inner side of the positioning frame (25). A universal seat (33) is rotatably connected to one end of the transmission rod (3). An inclined rod (34) is rotatably connected to the inner wall of the universal seat (33). A fixed seat (35) is rotatably connected to the outer surface of the inclined rod (34). The fixed seat (35) is fixedly installed on the outer surface of the grinder (2).

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