Rail milling device

Abstract

The present invention relates to the technical field of rail milling, and in particular to a rail milling device. A rail milling device comprises a rough milling device, a fine milling device and a grinding and polishing device, wherein the rough milling device, the fine milling device and the grinding and polishing device are respectively driven by a moving device to move and mill the rail along the rail, and the slag removal device follows the rough milling device, the fine milling device and the grinding and polishing device and collects and processes flying chips from the milling or grinding process. The various processing devices are arranged in sequence to form a continuous processing flow, which reduces the time for equipment adjustment and workpiece transfer. The use of the moving device allows the processing equipment to be flexibly moved along the rail to meet the processing requirements of long-distance rails, reducing interruptions and downtime. The step-by-step processing of rough milling, fine milling and grinding and polishing effectively improves the smoothness and precision of the rail surface and reduces surface defects and irregularities.

Description

Technical Field

[0001] The invention relates to the technical field of rail milling, and in particular to a rail milling device. Background Art

[0002] Rail milling technology is an advanced technology used to maintain and repair the surface of railway rails. Its core is to use high-precision milling tools to cut the rail surface, remove defective layers, and restore the geometry and surface quality of the rails, thereby extending the service life of the rails and improving the safety of track operation. It is also used to transform old rails to meet the needs of new railway systems, achieve reuse and save resources.

[0003] Rail milling technology utilizes a dedicated rail milling machine and a high-speed rotating milling cutter to perform precise mechanical cutting on the rail surface. During the milling process, defects such as cracks, corrugations, and depressions on the rails are removed layer by layer, ultimately achieving a smooth and level effect. Rail milling technology is suitable for the rapid repair of corrugated wear on the rail surface caused by long-term train operation, effectively removing shallow fatigue cracks on the rail surface to prevent crack propagation and rail breakage, and performing fine machining on rail weld joints to effectively improve the smooth transition between welds and rails, improve the stability of train operation, and reduce noise and vibration.

[0004] Although rail milling technology has many advantages in railway maintenance, the existing processing equipment still has some defects, which affect its efficiency and effectiveness. The milling process usually requires multiple steps such as rough milling, fine milling and polishing. Each step requires separate setting and adjustment of machine parameters. Between each step, it may be necessary to replace the tool or recalibrate the equipment, resulting in a waste of time. Current processing equipment often requires manual intervention to coordinate the conversion between various processing steps and lacks fully automated process control. During the processing of some equipment, due to factors such as tool wear, improper equipment calibration or vibration, the processing accuracy is insufficient and it is difficult to meet the high-standard rail surface finish and geometric shape requirements. Summary of the invention

[0005] In order to solve the problems of low single processing precision, slow multi-step processing speed and uncoordinated processing steps of processing equipment in rail milling, the present invention provides a rail milling device.

[0006] The present invention provides a rail milling device that adopts the following technical solution:

[0007] A rail milling device comprises a rough milling device, a fine milling device and a grinding and polishing device, wherein the rough milling device, the fine milling device and the grinding and polishing device are arranged in sequence and respectively perform rough milling, fine milling and grinding and polishing on the rails, the rough milling device, the fine milling device and the grinding and polishing device are respectively driven to move by a moving device and mill the rails along the rails, and a slag discharge device is arranged at the bottom or side of the rough milling device, the fine milling device and the grinding and polishing device, and the slag discharge device follows the rough milling device, the fine milling device and the grinding and polishing device and collects and processes flying chips from milling or grinding.

[0008] The various processing devices are arranged in sequence to form a continuous processing flow, which reduces the time for equipment adjustment and workpiece transfer. The use of mobile devices allows the processing equipment to move flexibly along the rails to meet the processing needs of long-distance rails and reduce interruptions and downtime. The step-by-step processing of rough milling, fine milling and grinding and polishing effectively improves the surface finish and accuracy of the rails and reduces surface defects and irregularities. The combination of fine milling and grinding and polishing processes effectively improves the high-quality surface finish and durability of the final product. The setting and synchronous movement of the slag discharge device ensure that the flying chips and waste generated during the processing can be collected and processed in time to keep the working environment clean. Through effective waste collection and processing, the impact of cutting chips on the equipment and environment is reduced, and the operating efficiency and safety of the equipment are improved. The integrated system design reduces the requirements for operators. The automated movement and processing process reduces the frequency and complexity of manual intervention. The real-time waste management and cleaning system also reduces the burden on operators and improves the convenience of overall operation. This modular design can adapt to the processing needs of rails of different lengths and specifications, and has high flexibility and adaptability. The mobility of the equipment enables it to be quickly deployed and used at different work sites, improving the applicability of the equipment.

[0009] Furthermore, the rough milling processing device includes a rough milling tool, a rough positioning tool holder and a rough tool cooling system. The rough milling tool is installed on the rough positioning tool holder and is driven by the rough positioning tool holder to move the rail for rough milling. The rough milling tool cooling system is installed on the side of the rough milling tool. The rough milling tool cooling system sprays coolant toward the rough milling tool and the rail for cooling.

[0010] The rough milling tool is driven by the rough positioning tool holder to move, which can quickly perform large-area rough processing on the rail, remove surface unevenness and defects, and shorten the processing cycle. The precise movement and positioning function of the rough positioning tool holder effectively improves the accuracy of the processing path. The rough tool cooling system directly sprays coolant to the rough milling tool and rail, effectively reducing the temperature during the cutting process, reducing tool wear and thermal fatigue. Through cooling and cooling, the service life of the tool is extended, the replacement frequency is reduced, and the maintenance cost is reduced. The effective cooling of the cooling system not only protects the tool, but also ensures the stability of the metal during processing, reduces thermal deformation, and improves processing accuracy and surface quality. The cooling system helps to suppress flying chips and dust generated during the cutting process, and combined with the slag removal device, keeps the processed workpiece clean.

[0011] Furthermore, the roughing milling tool comprises a parallel roughing cutter and a bottom milling cutter, the parallel roughing cutter is vertically arranged and performs horizontal milling processing on the upper surface of the rail, the bottom milling cutter is respectively installed on both sides of the parallel roughing cutter and performs milling processing on the lower jaw part of the rail, the rough positioning tool frame comprises a roughing cutter telescopic frame and a bottom cutter swinging frame, the roughing cutter telescopic frame is vertically telescopically installed, the parallel roughing cutter is installed at the telescopic front end of the roughing cutter telescopic frame, the bottom cutter swinging frame is swingably installed on both sides of the roughing cutter telescopic frame, and the bottom cutter is installed on the inner side of the bottom end of the bottom cutter swinging frame, the roughing tool cooling system comprises a side nozzle and a milling liquid tank, the side nozzle is installed near the parallel roughing cutter and the bottom milling cutter and sprays coolant toward the parallel roughing cutter and the bottom milling cutter, the side nozzle is connected to the milling liquid tank through a pipeline and a control valve body, and the milling liquid tank stores coolant.

[0012] The parallel roughing cutter is set vertically, which is specially used for horizontal milling of the upper surface of the rail, which can quickly remove surface unevenness and improve processing efficiency. The bottom milling cutter is installed on both sides of the parallel roughing cutter, which is specially used for milling the lower jaw part of the rail. All parts of the rail can be fully processed. The design of the rough positioning tool holder, including the roughing cutter telescopic frame and the bottom cutter swing frame, provides flexible tool adjustment capabilities. The vertical telescopic function of the roughing cutter telescopic frame allows the parallel roughing cutter to adjust its height according to processing requirements and adapt to the processing of rails of different thicknesses. The swing installation of the bottom cutter swing frame allows the bottom milling cutter to adjust its angle, effectively improving the precise processing of complex lower jaw parts. The roughing tool cooling system directly sprays coolant onto the parallel roughing cutter and the bottom milling cutter through the side pipe, which quickly reduces the temperature of the tool and the workpiece and reduces heat accumulation. Through effective cooling, the thermal deformation of the tool and the workpiece during processing is reduced, and the processing accuracy is improved. The use of coolant reduces smoke and dust during cutting and improves the safety and cleanliness of the working environment.

[0013] Furthermore, the finishing milling device includes a finishing milling tool, a finishing positioning tool holder and a finishing tool cooling system. The finishing milling tool is installed on the finishing positioning tool holder and is driven by the finishing positioning tool holder to move the rails for finishing milling. The finishing tool cooling system is installed on the side of the finishing milling tool and behind the moving direction. The finishing tool cooling system sprays coolant and blows air toward the finishing milling tool and the rails for cooling.

[0014] The finishing milling tool performs fine processing on the rails through the precise movement of the precision positioning tool holder, effectively improving the flatness and accuracy of the processed surface. The finishing milling process can eliminate surface defects after rough processing, improve the smoothness and consistency of the rail surface, and provide a better foundation for subsequent use. The finishing tool cooling system is installed on the side of the finishing milling tool and behind the moving direction. It can spray coolant and blow air for cooling in time, and quickly reduce the temperature of the tool and workpiece. This design effectively reduces heat accumulation, prevents thermal deformation caused by temperature increase during processing, and further improves processing accuracy and tool life.

[0015] Furthermore, the finishing milling tool comprises a parallel finishing cutter and a side milling cutter, the parallel finishing cutter is vertically arranged and performs horizontal milling processing on the upper surface of the rail, the side milling cutter is respectively installed on both sides of the parallel finishing cutter and performs milling processing on the side part of the rail head, the precision positioning tool holder comprises a finishing cutter telescopic frame and a side cutter swinging frame, the finishing cutter telescopic frame is vertically telescopically installed, the parallel finishing cutter is installed at the telescopic front end of the finishing cutter telescopic frame, the side cutter swinging frame is swingably installed on both sides of the finishing cutter telescopic frame, and the side milling cutter is installed on the inner side of the bottom end of the side cutter swinging frame, the finishing tool cooling system comprises a vertical nozzle and a blast pipe, the vertical nozzle is installed above the parallel finishing cutter and the side milling cutter and sprays coolant toward the parallel finishing cutter and the side milling cutter, and the blast pipe is installed behind the running direction of the parallel finishing cutter and the side milling cutter and blows air toward the rail.

[0016] The parallel finishing cutter is set vertically, which is specially used for horizontal milling of the upper surface of the rail. It can finely remove the surface unevenness after rough machining and improve the surface quality. The side milling cutter is installed on both sides of the parallel finishing cutter, which is specially used for milling the side part of the rail head, effectively processing the side of the rail to meet the use requirements. The design of the precision positioning tool holder, including the finishing cutter telescopic frame and the side cutter swing frame, provides flexible tool adjustment capabilities. The vertical telescopic function of the finishing cutter telescopic frame allows the parallel finishing cutter to adjust its height according to the processing requirements, which is suitable for the fine machining of rails of different thicknesses. The swing installation of the side cutter swing frame makes the side milling The angle of the tool can be adjusted to effectively improve the precise processing of the side part of the rail head. The vertical nozzle is installed above the parallel finishing tool and the side milling cutter to spray coolant directly onto the tool, quickly lowering the temperature of the tool and the workpiece and reducing heat accumulation. The blast pipe is installed behind the moving direction of the parallel finishing tool and the side milling cutter to blow air toward the rail to effectively take away the heat and chips generated by the processing. Through effective cooling, the thermal deformation of the tool and the workpiece during the processing is reduced, and the processing accuracy is improved. The application of the cooling system greatly reduces the thermal wear of the tool, extends the tool life, and reduces the maintenance and replacement costs.

[0017] Furthermore, the grinding and polishing device includes a grinding tool, a grinding tool holder and a spraying device. The grinding tool is installed on the grinding tool holder and is driven by the grinding tool holder to grind the rail. A spraying device is installed behind the moving direction of the grinding tool, and the spraying device sprays protective liquid toward the surface of the rail.

[0018] The grinding tool is precisely positioned and controlled to evenly grind the rail surface, eliminating surface unevenness and defects, and improving the smoothness and finish of the rail. After the grinding tool moves, the spraying device immediately sprays protective liquid on the rail surface. The protective liquid forms a protective film that can effectively prevent corrosion and oxidation and increase the service life of the rail.

[0019] Furthermore, the grinding tool includes a main grinding roller, a secondary grinding roller and a cleaning roller, the main grinding roller is arranged in the horizontal direction and vertically contacts the upper surface of the rail, the secondary grinding roller is installed on both sides of the main grinding roller and contacts the two side surfaces of the rail head, the cleaning roller is installed behind the moving direction of the main grinding roller and the secondary grinding roller and contacts the upper surface of the rail and the two side surfaces of the rail head at the same time, the grinding tool frame includes a grinding telescopic frame and a cleaning roller frame, the grinding telescopic frame is vertically telescopically installed, the main grinding roller and the secondary grinding roller are installed at the telescopic front end of the grinding telescopic frame, the cleaning roller frame is vertically telescopically installed behind the moving direction of the grinding telescopic frame, and the cleaning roller is installed at the telescopic front end of the cleaning roller frame, the spraying device includes a spraying pipe and a spraying liquid tank, the spraying pipe is installed behind the moving direction of the cleaning roller frame and sprays protective liquid toward the rail, the spraying pipe is connected to the spraying liquid tank through a pipeline and a control valve body, and the spraying liquid tank stores protective liquid.

[0020] The grinding main roller contacts the upper surface of the rail horizontally, which can effectively remove surface unevenness and improve smoothness. The grinding auxiliary roller is installed on both sides of the main roller, specially processing the two sides of the rail head, so that the entire rail surface can be evenly ground. The cleaning roller is located behind the grinding main roller and auxiliary roller, contacting the upper surface of the rail and the side of the rail head to further remove residual tiny particles and debris, effectively improving surface cleanliness. The vertical telescopic design of the grinding telescopic frame and the cleaning roller frame allows the position of the grinding and cleaning rollers to be flexibly adjusted according to the thickness and shape of different rails to meet various processing requirements. After grinding and cleaning are completed, the spray pipe immediately sprays protective liquid on the surface of the rail to form a uniform protective film to prevent corrosion and oxidation and improve the durability of the rail.

[0021] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

[0022] The movable frame rolls along the movable track through the movable wheels installed at its bottom, which can drive the rough milling processing device, the fine milling processing device and the grinding and polishing device to move along the track to complete the continuous processing of the rails, greatly improving the work efficiency and reducing the processing time. The movable track is embedded in the track positioning groove on the track table and fixed with bolts, which effectively improves the stability and accuracy of the track installation, avoids processing errors caused by loose or offset of the track, and ensures the processing quality. The workpiece clamp is controlled by the clamp adjusting screw, and the clamping position can be flexibly adjusted according to the specific specifications of the processed rail to keep the rail and the movable track in a level state.

[0023] Furthermore, the slag discharge device includes a flying chip collection device, a flying chip conveying device and a dust suction device. The flying chip collection device is arranged directly below the rough milling processing device, the fine milling processing device and the grinding and polishing device and receives the flying chips. The flying chip conveying device is installed at the bottom of the flying chip collection device and conveys and discharges the flying chips. The dust suction device is installed at the side of the grinding and polishing device and toward the processing end of the grinding and polishing device to suck dust. The flying chip collection device includes a flying chip collection bucket and a filter screen. The flying chip collection bucket is bucket-shaped and is installed directly below the rough milling processing device, the fine milling processing device and the grinding and polishing device and receives the flying chips. The filter screen is installed at the bottom of the flying chip collection bucket to filter the collected flying chips. The flying chip conveying device includes a conveying bracket and a conveying motor. The filter screen is conveyed and installed on the conveying bracket. The filter screen is transmission-connected to the conveying motor and driven for transmission by the conveying motor. The dust suction device includes a dust suction port and a negative pressure pump. The dust suction port is installed on both sides of the grinding and polishing device and is close to and toward the processing end of the grinding and polishing device for dust suction. The dust suction port is connected to the negative pressure pump through a pipeline.

[0024] The flying chip collection device is arranged directly below the processing device, which can quickly and effectively receive the flying chips generated during the rough milling, fine milling and grinding and polishing processes, avoiding the pollution of the environment by the scattering of flying chips. The filter net installed at the bottom of the flying chip collection bucket can filter the collected flying chips and separate the chips and coolant, effectively improving the smoothness of subsequent transportation and processing, and improving the overall efficiency of the slag discharge device. The flying chip conveying device realizes the automatic conveying function through the conveying bracket and the conveying motor. The conveying installation design of the filter net enables the filtered flying chips to be discharged quickly, reducing the frequency and workload of manual cleaning and improving the degree of automation of the production line. The dust suction device performs dust suction near the processing end of the grinding and polishing device through the cooperation of the dust suction port and the negative pressure pump, which can effectively capture the fine dust particles generated during the grinding process, reduce dust diffusion, and protect the operating environment and the health of operators.

[0025] Furthermore, a control and monitoring device is installed on the side and rear of the rough milling device, the fine milling device and the grinding and polishing device in the moving direction, and the control and monitoring device includes a monitoring camera device and a surface detection device, the monitoring camera devices are respectively installed on the side of the rough milling device, the fine milling device and the grinding and polishing device and face the processing surface of the rail, the surface detection device is respectively installed behind the moving direction of the rough milling device, the fine milling device and the grinding and polishing device and contacts the processing surface of the rail, the monitoring camera device includes a monitoring head and a display, the monitoring heads are respectively installed on the side of the rough milling device, the fine milling device and the grinding and polishing device and face the processing surface of the rail, the monitoring head is connected to the display via a data wire and transmits the monitoring picture to the display in real time, the surface detection device includes a flatness detection probe and a defect detection probe, the flatness detection probe and the defect detection probe are respectively installed behind the moving direction of the rough milling device, the fine milling device and the grinding and polishing device and contact the processing surface of the rail.

[0026] The monitoring camera is installed on the side of the processing device, with the monitoring head facing the processing surface of the rail. It can capture the images during the processing in real time and transmit the images to the display through the data line. The operator can view the processing status in real time through the display, discover and correct problems in time, and improve the processing quality and efficiency. The surface detection device includes a flatness detection probe and a defect detection probe, which are respectively installed behind the moving direction of the processing device and contact the processing surface of the rail. The flatness detection probe can detect the flatness after processing and whether the surface meets the requirements. The defect detection probe is used to identify surface defects such as cracks and dents, effectively improving product quality. The monitoring data and detection data can be recorded for subsequent quality analysis and improvement. Through data analysis, potential problems in processing can be discovered and optimized to improve the overall efficiency of the production line.

[0027] In summary, the present invention has the following beneficial technical effects:

[0028] 1. Each processing device is arranged in sequence to form a continuous processing flow, which reduces the time for equipment adjustment and workpiece transfer. The use of mobile devices allows the processing equipment to move flexibly along the rails to meet the processing needs of long-distance rails and reduce interruptions and downtime. The step-by-step processing of rough milling, fine milling and grinding and polishing effectively improves the surface finish and accuracy of the rails and reduces surface defects and irregularities. The combination of fine milling and grinding and polishing processes effectively improves the high-quality surface finish and durability of the final product. The setting and synchronous movement of the slag discharge device can collect and treat the flying chips and waste generated during the processing in time to keep the working environment clean. Through effective waste collection and treatment, the impact of cutting chips on the equipment and environment is reduced, and the operation efficiency and safety of the equipment are improved. The integrated system design reduces the requirements for operators. The automated movement and processing process reduces the frequency and complexity of manual intervention. The real-time waste management and cleaning system also reduces the burden on operators and improves the convenience of overall operation. This modular design can adapt to the processing needs of rails of different lengths and specifications, and has high flexibility and adaptability. The mobility of the equipment enables it to be quickly deployed and used at different work sites, improving the applicability of the equipment.

[0029] 2. The rough milling tool is driven by the rough positioning tool holder to move, which can quickly perform large-area rough processing on the rail, remove surface unevenness and defects, and shorten the processing cycle. The precise movement and positioning function of the rough positioning tool holder effectively improves the accuracy of the processing path. The rough tool cooling system directly sprays coolant to the rough milling tool and rail, effectively reducing the temperature during the cutting process, reducing tool wear and thermal fatigue. Through cooling and cooling, the service life of the tool is extended, the replacement frequency is reduced, and the maintenance cost is reduced. The effective cooling of the cooling system not only protects the tool, but also ensures the stability of the metal during processing, reduces thermal deformation, and improves processing accuracy and surface quality. The cooling system helps to suppress flying chips and dust generated during the cutting process, and combined with the slag removal device, keeps the processed workpiece clean.

[0030] 3. The fine milling tool can perform fine processing on the rail through the precise movement of the precision positioning tool holder, effectively improving the flatness and accuracy of the processed surface. The fine milling process can eliminate surface defects after rough processing, improve the smoothness and consistency of the rail surface, and provide a better foundation for subsequent use. The fine tool cooling system is installed on the side of the fine milling tool and behind the moving direction. It can spray coolant and blast air for cooling in time, and quickly reduce the temperature of the tool and workpiece. This design effectively reduces heat accumulation, prevents thermal deformation caused by temperature increase during processing, and further improves processing accuracy and tool life.

[0031] 4. The grinding tool is precisely positioned and controlled to evenly grind the rail surface, eliminating surface unevenness and defects, and improving the smoothness and finish of the rail. After the grinding tool moves, the spraying device immediately sprays protective liquid on the rail surface. The protective liquid forms a protective film that can effectively prevent corrosion and oxidation and increase the service life of the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the present invention in the installation and use state;

[0033] Figure 2 for Figure 1 Schematic diagram of the second perspective;

[0034] Figure 3 for Figure 1 Schematic diagram of the third perspective.

[0035] Description of reference numerals:

[0036] 1. Rough milling device, 11. Rough milling tool, 111. Parallel roughing tool, 112. Bottom milling tool, 12. Rough positioning tool holder, 121. Roughing tool telescopic holder, 122. Bottom tool swing holder, 13. Roughing tool cooling system, 131. Side spray pipe, 132. Milling fluid tank;

[0037] 2. Fine milling device, 21. Fine milling tool, 211. Parallel fine cutter, 212. Side milling cutter, 22. Fine positioning tool holder, 221. Fine cutter telescopic holder, 222. Side cutter swing holder, 23. Fine cutter cooling system, 231. Vertical nozzle, 232. Blower pipe;

[0038] 3. Grinding and polishing device, 31. Grinding tool, 311. Grinding main roller, 312. Grinding auxiliary roller, 313. Cleaning roller, 32. Grinding tool holder, 321. Grinding telescopic holder, 322. Cleaning roller holder, 33. Spraying device, 331. Spraying pipe, 332. Spraying liquid tank;

[0039] 4. Moving device, 41. Moving frame, 411. Moving wheel, 412. Moving motor, 42. Moving track, 421. Track table, 422. Track positioning groove, 43. Workpiece fixture, 431. Clamping table, 432. Fixture adjusting screw;

[0040] 5. Slag discharge device, 51. Flying chip collection device, 511. Flying chip collection bucket, 512. Filter screen, 52. Flying chip conveying device, 521. Conveying bracket, 522. Conveying motor, 53. Dust suction device, 531. Dust suction port, 532. Negative pressure pump;

[0041] 6. Control monitoring device, 61. Monitoring camera device, 611. Monitoring head, 612. Display, 62. Surface detection device, 621. Flatness detection probe, 622. Defect detection probe. DETAILED DESCRIPTION

[0042] The following will be combined with the attached Figure 1-Figure 3 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] Embodiment 1:

[0045] The embodiment of the present invention discloses a rail milling device, referring to Figure 1 , comprising a rough milling device 1, a fine milling device 2 and a grinding and polishing device 3, wherein the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 are arranged in sequence and perform rough milling, fine milling and grinding and polishing on the rail respectively;

[0046] The rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 are respectively driven by the moving device 4 to move and mill the rails along the rails;

[0047] A slag removal device 5 is arranged at the bottom or side of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3. The slag removal device 5 follows the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and collects and processes flying chips from milling or grinding.

[0048] Fix the rail to be processed in the processing area, ensure that the rail is in the correct position and aligned with the processing track of the device, connect the power of the equipment, start the control system, and confirm that the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 are in standby state.

[0049] The moving device 4 is started to move the rough milling device 1 along the rail. The rough milling device 1 performs preliminary processing on the rail to remove the rough layer or excess material on the surface. During the processing, the slag removal device 5 collects a large amount of flying chips generated during the rough milling process in real time.

[0050] After the rough milling is completed, the fine milling device 2 automatically follows the moving path of the rough milling device 1 to perform fine processing on the rail. The fine milling device 2 further trims the surface of the rail to ensure the size and shape accuracy. The slag removal device 5 continues to operate to collect the fine flying chips generated during the fine milling process.

[0051] After fine milling is completed, the grinding and polishing device 3 moves along the rail to polish the rail surface. The grinding and polishing device 3 eliminates minor surface defects and improves surface finish. The slag removal device 5 absorbs fine dust generated by grinding and polishing at this stage to keep the environment clean.

[0052] Before starting the equipment, ensure that all personnel stay away from the processing area to avoid accidental injuries. The filter and transmission system of the slag discharge device 5 should be cleaned regularly to ensure its normal operation. The monitoring screen should be checked at any time during the processing, and the equipment should be suspended in time if any abnormality is found.

[0053] Embodiment 2:

[0054] On the basis of Example 1, add:

[0055] Reference Figure 1 The rough milling device 1 includes a rough milling tool 11, a rough positioning tool holder 12 and a rough tool cooling system 13. The rough milling tool 11 is installed on the rough positioning tool holder 12 and is driven by the rough positioning tool holder 12 to move the rail for rough milling. The rough milling tool cooling system 13 is installed on the side of the rough milling tool 11. The rough milling tool cooling system 13 sprays coolant toward the rough milling tool 11 and the rail for cooling.

[0056] Reference Figure 2 and Figure 3 The rough milling cutter 11 comprises a parallel rough cutter 111 and a bottom milling cutter 112. The parallel rough cutter 111 is vertically arranged and performs horizontal milling processing on the upper surface of the rail. The bottom milling cutter 112 is respectively installed on both sides of the parallel rough cutter 111 and performs milling processing on the lower jaw part of the rail.

[0057] The rough positioning tool holder 12 comprises a roughing tool telescopic frame 121 and a bottom tool swing frame 122. The roughing tool telescopic frame 121 is vertically telescopically installed. A parallel roughing tool 111 is installed at the telescopic front end of the roughing tool telescopic frame 121. The bottom tool swing frame 122 is swingably installed on both sides of the roughing tool telescopic frame 121. A bottom milling cutter 112 is installed on the inner side of the bottom end of the bottom tool swing frame 122.

[0058] The roughing tool cooling system 13 includes a side nozzle 131 and a milling fluid tank 132. The side nozzle 131 is installed near the parallel roughing tool 111 and the bottom milling cutter 112 and sprays coolant toward the parallel roughing tool 111 and the bottom milling cutter 112. The side nozzle 131 is connected to the milling fluid tank 132 through a pipeline and a control valve body. The milling fluid tank 132 stores coolant.

[0059] The power supply and control system of the rough milling device 1 are started, and the parallel rough cutter 111 and the bottom milling cutter 112 are adjusted to the initial positions.

[0060] The roughing cutter telescopic frame 121 is started to make the parallel roughing cutter 111 telescope vertically and perform horizontal milling on the upper surface of the rail, and the bottom cutter swing frame 122 is started to make the bottom milling cutter 112 swing to a suitable position to perform milling on the lower jaw of the rail.

[0061] At the same time, the roughing tool cooling system 13 is started, and the side nozzle 131 starts to spray coolant to ensure that the parallel roughing tool 111 and the bottom milling cutter 112 maintain a suitable temperature during the processing.

[0062] According to the processing situation, the extension amount of the roughing knife extension frame 121 and the swing angle of the bottom knife swing frame 122 are adjusted in real time to ensure the processing accuracy.

[0063] Embodiment 3:

[0064] On the basis of Example 1, add:

[0065] Reference Figure 1 The finishing milling device 2 includes a finishing milling tool 21, a finishing positioning tool holder 22 and a finishing tool cooling system 23. The finishing milling tool 21 is installed on the finishing positioning tool holder 22 and is driven by the finishing positioning tool holder 22 to move the rail for finishing milling. The finishing tool cooling system 23 is installed on the side of the finishing milling tool 21 and the rear of the moving direction. The finishing tool cooling system 23 sprays coolant and blows air toward the finishing milling tool 21 and the rail for cooling.

[0066] Reference Figure 2 and Figure 3 The finishing milling tool 21 includes a parallel finishing cutter 211 and a side milling cutter 212. The parallel finishing cutter 211 is vertically arranged and performs horizontal milling processing on the upper surface of the rail. The side milling cutter 212 is respectively installed on both sides of the parallel finishing cutter 211 and performs milling processing on the side part of the rail head.

[0067] The precision positioning tool holder 22 comprises a precision tool telescopic frame 221 and a side tool swing frame 222. The precision tool telescopic frame 221 is vertically telescopically installed. A parallel precision tool 211 is installed at the telescopic front end of the precision tool telescopic frame 221. The side tool swing frame 222 is swingably installed at both sides of the precision tool telescopic frame 221. A side milling cutter 212 is installed on the inner side of the bottom end of the side tool swing frame 222.

[0068] The finishing tool cooling system 23 includes a vertical nozzle 231 and a blast pipe 232. The vertical nozzle 231 is installed above the parallel finishing tool 211 and the side milling cutter 212 and sprays coolant toward the parallel finishing tool 211 and the side milling cutter 212. The blast pipe 232 is installed behind the running direction of the parallel finishing tool 211 and the side milling cutter 212 and blows air toward the rail.

[0069] The power supply and control system of the fine milling device 2 are started, and the parallel fine cutter 211 and the side milling cutter 212 are adjusted to the initial positions.

[0070] Start the fine cutter telescopic frame 221 to make the parallel fine cutter 211 vertically telescope and perform horizontal milling on the upper surface of the rail, start the side cutter swing frame 222 to make the side milling cutter 212 swing to a suitable position and perform milling on the side part of the rail head.

[0071] The fine tool cooling system 23 is started, and the vertical nozzle 231 begins to spray coolant to ensure that the tool maintains a suitable temperature during the processing. The blast pipe 232 is started to blow air to the rail from the rear of the tool's moving direction to effectively dry the rail and facilitate subsequent grinding processing.

[0072] Embodiment 4:

[0073] On the basis of Example 1, add:

[0074] Reference Figure 1 The grinding and polishing device 3 includes a grinding tool 31, a grinding tool holder 32 and a spraying device 33. The grinding tool 31 is installed on the grinding tool holder 32 and is driven by the grinding tool holder 32 to grind the rail. A spraying device 33 is installed behind the moving direction of the grinding tool 31. The spraying device 33 sprays a protective liquid toward the surface of the rail.

[0075] Reference Figure 2 and Figure 3 The grinding tool 31 includes a grinding main roller 311, a grinding auxiliary roller 312 and a cleaning roller 313. The grinding main roller 311 is arranged in the horizontal direction and vertically contacts the upper surface of the rail. The grinding auxiliary roller 312 is installed on both sides of the grinding main roller 311 and contacts the two side surfaces of the rail head. The cleaning roller 313 is installed behind the moving direction of the grinding main roller 311 and the grinding auxiliary roller 312 and contacts the upper surface of the rail and the two side surfaces of the rail head at the same time.

[0076] The grinding tool holder 32 includes a grinding telescopic holder 321 and a cleaning roller holder 322. The grinding telescopic holder 321 is installed to be telescopically mounted vertically. A grinding main roller 311 and a grinding auxiliary roller 312 are installed at the telescopic front end of the grinding telescopic holder 321. The cleaning roller holder 322 is installed to be telescopically mounted vertically at the rear of the grinding telescopic holder 321 in the moving direction. A cleaning roller 313 is installed at the telescopic front end of the cleaning roller holder 322.

[0077] The spraying device 33 includes a spraying pipe 331 and a spraying liquid tank 332. The spraying pipe 331 is installed behind the moving direction of the cleaning roller frame 322 and sprays the protective liquid toward the rail. The spraying pipe 331 is connected to the spraying liquid tank 332 through a pipeline and a control valve body. The spraying liquid tank 332 stores the protective liquid.

[0078] The power supply and control system of the grinding and polishing device 3 are started, and the grinding main roller 311, the grinding auxiliary roller 312 and the cleaning roller 313 are adjusted to the initial positions.

[0079] The grinding telescopic frame 321 is started to make the grinding main roller 311 vertically extend and contact the upper surface of the rail vertically for grinding, and the grinding auxiliary roller 312 is started to move so that it contacts the two side surfaces of the rail head for side grinding.

[0080] The cleaning roller frame 322 is started to make the cleaning roller 313 contact the upper surface and the side surface of the rail at the same time to remove the dust and residues generated during the grinding process.

[0081] The spraying device 33 is started, and the spraying pipe 331 starts to spray the protective liquid to ensure that the rail surface is fully protected after grinding to prevent oxidation and corrosion.

[0082] Embodiment 5:

[0083] On the basis of Example 1, add:

[0084] Reference Figure 1-Figure 3 The mobile device 4 includes a mobile frame 41, a mobile rail 42 and a workpiece fixture 43. The mobile frame 41 is installed and moved along the mobile rail 42. The rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 are respectively installed on the mobile frame 41 and driven by the mobile frame 41 to move along the mobile rail 42. The workpiece fixture 43 is installed on one side of the mobile rail 42.

[0085] A moving wheel 411 is installed at the bottom of the moving frame 41. The moving wheel 411 is rolled along the moving track 42 and drives the moving frame 41 to move along the moving track 42. The rotating main shaft of the moving wheel 411 is connected to the main shaft of the moving motor 412.

[0086] A track table 421 is provided at the bottom of the movable track 42, and the movable track 42 is installed and fixed on the track table 421 by bolts. A track positioning groove 422 is provided on the track table 421, and the movable track 42 is embedded in the track positioning groove 422;

[0087] The workpiece clamp 43 is installed on the clamping table 431. The workpiece clamp 43 is controlled to move and install through the clamp adjusting screw 432. The workpiece clamp 43 clamps the processed rail to be flush with the moving track 42. The moving wheels 411 are divided into two rows, one row is rollingly installed along the moving track 42, and the other row is rollingly installed on the processed rail.

[0088] The steel rail to be processed is placed on the clamping table 431 and fixed by the workpiece clamp 43 and the clamp adjusting screw 432 to ensure the stability and accurate position of the steel rail.

[0089] Start the mobile motor 412 to make the mobile wheel 411 roll and drive the mobile frame 41 to move along the mobile track 42, ensure that the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 process the rails in sequence, monitor the moving speed and position of the mobile frame 41, ensure that each processing device performs the corresponding processing steps in the correct position, and adjust the speed of the mobile motor 412 according to the processing progress to ensure the continuity and efficiency of the processing.

[0090] Reference Figure 1-Figure 3 The slag discharge device 5 includes a flying chip collection device 51, a flying chip conveying device 52 and a dust collecting device 53. The flying chip collection device 51 is arranged directly below the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and receives the flying chips. The flying chip conveying device 52 is installed at the bottom of the flying chip collection device 51 and conveys and discharges the flying chips. The dust collecting device 53 is installed at the side of the grinding and polishing device 3 and toward the processing end of the grinding and polishing device 3 to collect dust.

[0091] The flying chip collecting device 51 comprises a flying chip collecting bucket 511 and a filter screen 512. The flying chip collecting bucket 511 is bucket-shaped and is installed directly below the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 to receive the flying chips. The filter screen 512 is installed at the bottom of the flying chip collecting bucket 511 to filter the collected flying chips.

[0092] The flying debris conveying device 52 includes a conveying bracket 521 and a conveying motor 522. The filter screen 512 is conveyed and installed on the conveying bracket 521. The filter screen 512 is connected to the conveying motor 522 and driven by the conveying motor 522.

[0093] The dust suction device 53 includes a dust suction port 531 and a negative pressure pump 532. The dust suction port 531 is installed on both sides of the grinding and polishing device 3 and is close to and facing the processing end of the grinding and polishing device 3 for dust suction. The dust suction port 531 is connected to the negative pressure pump 532 through a pipeline.

[0094] The conveying motor 522 is started to make the filter screen 512 start conveying and prepare to collect and transport flying chips, and the negative pressure pump 532 is started to make the dust collecting device 53 start working to provide dust collecting support for grinding and polishing.

[0095] During the rough milling, fine milling and grinding and polishing processes, the flying chip collecting bucket 511 receives the flying chips, which are filtered by the filter screen 512 , remain on the filter screen 512 and are transported and discharged, and the coolant etc. fall into the water tank at the bottom of the filter screen 512 .

[0096] The dust suction port 531 is kept close to the processing end during the grinding process to continuously suck out the generated dust, and transmits the sucked dust to the negative pressure pump 532 through the pipeline to ensure the cleanliness of the working area.

[0097] Reference Figure 1-Figure 3 A control monitoring device 6 is installed on the side and rear of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 in the moving direction. The control monitoring device 6 includes a monitoring camera 61 and a surface detection device 62. The monitoring camera 61 is installed on the side of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and faces the processing surface of the rail. The surface detection device 62 is installed on the rear of the moving direction of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and contacts the processing surface of the rail.

[0098] The monitoring camera device 61 includes a monitoring head 611 and a display 612. The monitoring head 611 is respectively installed on the side of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and faces the processing surface of the rail. The monitoring head 611 is connected to the display 612 through a data wire and transmits the monitoring picture to the display 612 in real time.

[0099] The surface detection device 62 includes a flatness detection probe 621 and a defect detection probe 622, which are respectively installed behind the moving direction of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3 and contact the processed surface of the rail.

[0100] The display 612 includes three displays, which respectively display the processing screens of the rough milling device 1, the fine milling device 2 and the grinding and polishing device 3.

[0101] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A rail milling device, characterized in that: The invention comprises a rough milling device (1), a fine milling device (2) and a grinding and polishing device (3), wherein the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) are arranged in sequence and respectively perform rough milling, fine milling and grinding and polishing on the rail; The rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) are respectively driven by the moving device (4) to move and mill the steel rail along the steel rail; A slag removal device (5) is provided at the bottom or side of the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3), and the slag removal device (5) follows the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) and collects and processes flying chips generated by milling or grinding; The grinding and polishing device (3) comprises a grinding tool (31), a grinding tool holder (32) and a spraying device (33); the grinding tool (31) is mounted on the grinding tool holder (32) and is driven by the grinding tool holder (32) to move and grind the rail; a spraying device (33) is mounted behind the grinding tool (31) in the moving direction, and the spraying device (33) sprays a protective liquid toward the surface of the rail; The grinding tool (31) comprises a grinding main roller (311), a grinding auxiliary roller (312) and a cleaning roller (313); the grinding main roller (311) is arranged in a horizontal direction and vertically contacts the upper surface of the rail; the grinding auxiliary roller (312) is installed on both sides of the grinding main roller (311) and contacts the two side surfaces of the rail head; the cleaning roller (313) is installed behind the grinding main roller (311) and the grinding auxiliary roller (312) in the moving direction and contacts the upper surface of the rail and the two side surfaces of the rail head at the same time; The grinding tool frame (32) comprises a grinding telescopic frame (321) and a cleaning roller frame (322); the grinding telescopic frame (321) is installed in a vertical telescopic manner; a grinding main roller (311) and a grinding auxiliary roller (312) are installed at the telescopic front end of the grinding telescopic frame (321); the cleaning roller frame (322) is installed in a vertical telescopic manner at the rear of the grinding telescopic frame (321) in a moving direction; a cleaning roller (313) is installed at the telescopic front end of the cleaning roller frame (322); The spraying device (33) comprises a spraying pipe (331) and a spraying liquid tank (332); the spraying pipe (331) is installed behind the moving direction of the cleaning roller frame (322) and sprays the protective liquid toward the rail; the spraying pipe (331) is connected to the spraying liquid tank (332) via a pipeline and a control valve body; the spraying liquid tank (332) stores the protective liquid; The moving device (4) comprises a moving frame (41), a moving track (42) and a workpiece fixture (43); the moving frame (41) is movably installed along the moving track (42); the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) are respectively installed on the moving frame (41) and driven by the moving frame (41) to move along the moving track (42); and the workpiece fixture (43) is installed on one side of the moving track (42); A moving wheel (411) is installed at the bottom of the moving frame (41), and the moving wheel (411) is installed in a rolling manner along the moving track (42) and drives the moving frame (41) to move along the moving track (42), and the rotating main shaft of the moving wheel (411) is connected to the main shaft of the moving motor (412); A track table (421) is provided at the bottom of the movable track (42), the movable track (42) is installed and fixed on the track table (421) by means of bolts, a track positioning groove (422) is provided on the track table (421), and the movable track (42) is embedded in the track positioning groove (422); The workpiece clamp (43) is mounted on a clamping table (431). The workpiece clamp (43) is controlled to move and install by a clamp adjusting screw (432). The workpiece clamp (43) clamps the processed steel rail to be flush with the moving rail (42). The moving wheels (411) are divided into two rows, one row of which is rollingly installed along the moving rail (42) and the other row of which is rollingly installed on the processed steel rail.

2. A rail milling device according to claim 1, characterized in that: The rough milling processing device (1) comprises a rough milling tool (11), a rough positioning tool holder (12) and a rough milling tool cooling system (13); the rough milling tool (11) is mounted on the rough positioning tool holder (12) and is driven by the rough positioning tool holder (12) to move and perform rough milling processing on a rail; a rough milling tool cooling system (13) is mounted on the side of the rough milling tool (11); the rough milling tool cooling system (13) sprays a coolant toward the rough milling tool (11) and the rail to cool them down.

3. A rail milling device according to claim 2, characterized in that: The rough milling cutter (11) comprises a parallel rough cutter (111) and a bottom milling cutter (112); the parallel rough cutter (111) is arranged vertically and performs horizontal milling processing on the upper surface of the rail; the bottom milling cutter (112) is respectively installed on both sides of the parallel rough cutter (111) and performs milling processing on the lower jaw portion of the rail; The rough positioning tool frame (12) comprises a roughing tool telescopic frame (121) and a bottom tool swing frame (122), wherein the roughing tool telescopic frame (121) is installed to be telescopically mounted vertically, a parallel roughing tool (111) is installed at the telescopic front end of the roughing tool telescopic frame (121), and the bottom tool swing frame (122) is swingably mounted on both sides of the roughing tool telescopic frame (121), and a bottom surface milling cutter (112) is installed on the inner side of the bottom end of the bottom tool swing frame (122); The roughing tool cooling system (13) comprises a side spray pipe (131) and a milling fluid tank (132); the side spray pipe (131) is installed near the parallel roughing tool (111) and the bottom milling tool (112) and sprays cooling fluid toward the parallel roughing tool (111) and the bottom milling tool (112); the side spray pipe (131) is connected to the milling fluid tank (132) via a pipeline and a control valve body; and the milling fluid tank (132) stores cooling fluid.

4. A rail milling device according to claim 1, characterized in that: The fine milling processing device (2) comprises a fine milling tool (21), a fine positioning tool holder (22) and a fine tool cooling system (23); the fine milling tool (21) is mounted on the fine positioning tool holder (22) and is driven by the fine positioning tool holder (22) to move and fine mill the rail; the fine tool cooling system (23) is mounted on the side of the fine milling tool (21) and behind the moving direction; the fine tool cooling system (23) sprays coolant and blows air towards the fine milling tool (21) and the rail to cool them down.

5. A rail milling device according to claim 4, characterized in that: The finishing milling cutter (21) comprises a parallel finishing cutter (211) and a side milling cutter (212); the parallel finishing cutter (211) is arranged vertically and performs horizontal milling processing on the upper surface of the rail; the side milling cutter (212) is respectively installed on both sides of the parallel finishing cutter (211) and performs milling processing on the side portion of the rail head; The precision positioning tool rack (22) comprises a precision tool telescopic rack (221) and a side tool swing rack (222), wherein the precision tool telescopic rack (221) is vertically telescopically mounted, a parallel precision tool (211) is mounted at the telescopic front end of the precision tool telescopic rack (221), the side tool swing rack (222) is swingably mounted on both sides of the precision tool telescopic rack (221), and a side milling cutter (212) is mounted on the inner side of the bottom end of the side tool swing rack (222); The finishing tool cooling system (23) comprises a vertical nozzle (231) and an air blast pipe (232); the vertical nozzle (231) is installed above the parallel finishing tool (211) and the side milling cutter (212) and sprays cooling liquid toward the parallel finishing tool (211) and the side milling cutter (212); the air blast pipe (232) is installed behind the parallel finishing tool (211) and the side milling cutter (212) in their running direction and blows air toward the rail.

6. A rail milling device according to claim 1, characterized in that: The slag removal device (5) comprises a flying chip collection device (51), a flying chip conveying device (52) and a dust suction device (53); the flying chip collection device (51) is arranged directly below the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) and receives the flying chips; the flying chip conveying device (52) is installed at the bottom of the flying chip collection device (51) and conveys and discharges the flying chips; and the dust suction device (53) is installed on the side of the grinding and polishing device (3) and toward the processing end of the grinding and polishing device (3) to suction dust; The flying chip collection device (51) comprises a flying chip collection bucket (511) and a filter screen (512); the flying chip collection bucket (511) is bucket-shaped and is installed directly below the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) to receive the flying chips; the filter screen (512) is installed at the bottom of the flying chip collection bucket (511) to filter the collected flying chips; The flying debris conveying device (52) comprises a conveying bracket (521) and a conveying motor (522); the filter screen (512) is conveyingly mounted on the conveying bracket (521); the filter screen (512) is drivingly connected to the conveying motor (522) and driven by the conveying motor (522) for conveying; The dust suction device (53) comprises a dust suction port (531) and a negative pressure pump (532); the dust suction port (531) is installed on both sides of the grinding and polishing device (3) and is close to and facing the processing end of the grinding and polishing device (3) for dust suction; the dust suction port (531) is connected to the negative pressure pump (532) via a pipeline.

7. A rail milling device according to any one of claims 1 to 6, characterized in that: A control monitoring device (6) is installed on the side and rearward of the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) in the moving direction. The control monitoring device (6) comprises a monitoring camera device (61) and a surface detection device (62). The monitoring camera devices (61) are installed on the side of the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) and face the processed surface of the rail. The surface detection device (62) is installed on the rearward of the moving direction of the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) and contacts the processed surface of the rail. The monitoring camera device (61) comprises a monitoring head (611) and a display (612); the monitoring head (611) is respectively installed on the side of the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) and faces the processed surface of the rail; the monitoring head (611) is connected to the display (612) via a data wire and transmits the monitoring image to the display (612) in real time; The surface detection device (62) comprises a flatness detection probe (621) and a defect detection probe (622), wherein the flatness detection probe (621) and the defect detection probe (622) are respectively installed behind the rough milling device (1), the fine milling device (2) and the grinding and polishing device (3) in the moving direction and contact the processed surface of the rail.

Images