A milling cutter for online repair of rails

Abstract

The present invention provides a rail online repair milling cutter, which belongs to the technical field of machining tools. The present invention sets a plurality of groups of tool grooves including top surface machining grooves and side surface machining grooves on the wheel surface of a wheel-shaped cutter disc, and the large surface of the blade in the top surface machining groove is arranged in a plane inclined with the radial direction of the cutter disc, and the large surface of the blade in the side surface machining groove is arranged in a plane inclined with the axial direction of the cutter disc, so that when the cross section of the rail is taken as a reference, each blade is arranged flat, so that the contact area between the cutter disc and the blade in the cutting direction is larger, the supporting performance is better, the clamping is more stable, the cutting resistance is smaller, and the milling efficiency is higher. At the same time, the blade can be pressed by a pressing block to prevent the blade from being punched and affecting the structural strength. The blade has a long service life and a low replacement frequency. The blade can be taken and placed when the pressing block is slightly loose, and the blade is more convenient to replace, which is suitable for continuous repair of long rails.

Description

Technical Field

[0001] The invention relates to the technical field of machining tools, in particular to a rail online repair milling cutter. Background Art

[0002] As one of the main modes of transportation in modern transportation, rail transit has high safety, strong carrying capacity and extremely high market share. In the rail transit system, the main components include rails and wheels. The wheels roll on the rails to realize the operation of the train. The performance of the rails directly affects the operation of the train. Therefore, ensuring the performance of the rails has become the focus of industry research.

[0003] After long-term use, the surface of the rails is prone to peeling, cracks, scratches, wear and tear due to the long-term and frequent contact between the wheels and the rails, which will affect the operation of the train and pose a major safety hazard. Therefore, the rails need to be maintained regularly. At present, the industry mainly uses rail milling and grinding vehicles to repair the rails. The milling cutter to be repaired is installed on the rail milling and grinding vehicle, and the surface of the rail is milled by rotating the milling cutter to complete the repair of the rail. However, the existing repair milling cutter adopts the milling cutter structure for online rail repair disclosed in patent CN111644676B, which is provided with a circle of cutter seats on an annular base, a blade is installed on one side of the cutter seat, a notch is provided on the outer circumferential surface of the base along the axial direction, and a strip groove is provided along the radial direction of the base on one end surface of the base, each notch is directly opposite to at least one strip groove, and an inclined hole extending to the inner wall of the notch is provided at one end of the strip groove close to the notch, and a cutter seat is provided in each notch. The surface of the knife is in contact with the inner wall of the notch, a threaded hole is provided in the middle of the knife seat and is opposite to the oblique hole in the same position. When the knife seat is installed on the base, the oblique hole and the threaded hole are connected by screws, thereby realizing the combined installation of the knife seat for installing the blade on the base. In addition, the installation of the blade on each knife seat is arranged along the tangential direction of the base. Compared with the cross section of the rail, each blade is placed vertically when it is directly above the rail, and a through installation hole is opened in the middle of each blade, which is locked on the knife seat after the screw passes through the installation hole. Although the above-mentioned milling cutter structure can meet the needs of rail repair, in order to ensure that each blade can act on the rail, it is necessary to ensure the accuracy of the installation position between the cutter seat and the base. Not only the processing accuracy but also the assembly accuracy must be considered. There are many uncertain factors. In addition, the blade is installed in a vertical position, which makes the contact surface of the cutter seat on the blade smaller, resulting in a larger force applied by the blade to the screws for installing it, affecting the service life and installation stability of the blade, and the milling efficiency is low. In addition, the method of directly processing the mounting hole on the blade will occupy the largest surface of the blade, resulting in poor structural strength of the blade. For the repair scenario of long rails, not only does it need to replace the blade frequently, but each time the blade is replaced, the screws need to be completely disassembled before replacement. The operation is extremely inconvenient and is not conducive to track repair. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide an online rail repair milling cutter, which is provided with an integrated cutter disc, and a plurality of groups of tool grooves are arranged in an array on the outer edge of the cutter disc, each tool groove includes a plurality of top surface processing grooves arranged obliquely with respect to the axial direction of the cutter disc and a plurality of side surface processing grooves arranged obliquely with respect to the radial direction of the cutter disc, and a blade is arranged in each top surface processing groove and the side surface processing groove, so that the blade can be directly installed on the cutter disc without the need for an intermediate transfer structure, thereby ensuring the assembly accuracy. At the same time, based on the cross section of the rail, each blade is arranged flat, so that the contact area of ​​the cutter disc with the blade is larger, the supporting performance is better, the cutting resistance is smaller, and the milling efficiency is higher. At the same time, a pressure block with an inclined pressing surface is provided on the side of each blade, and the blade is pressed by the pressure block, which can prevent the problem of punching holes on the blade and affecting the structural strength of the blade, and prolong the service life of the blade and reduce the frequency of blade replacement. In addition, the blade can be disassembled by loosening the pressure block, and the blade replacement is more convenient, which is more suitable for the continuous repair of long rails.

[0005] The specific technical solutions are as follows:

[0006] A rail online repair milling cutter, comprising a cutter disc and a blade, has the following characteristics:

[0007] The cutter disc is wheel-shaped, and an inwardly concave annular milling groove is arranged on one side of the wheel surface of the cutter disc, and the groove bottom contour line of the annular milling groove is arranged in an "L" shape. At the same time, the two directions of the groove bottom of the annular milling groove correspond to the radial direction and the axial direction of the cutter disc respectively, and a plurality of groups of cutter grooves are arranged in an annular array on the groove bottom of the annular milling groove, and each group of cutter grooves includes a plurality of top surface processing grooves and a plurality of side surface processing grooves. At the same time, the top surface processing groove is arranged on the groove bottom of the annular milling groove corresponding to the axial direction of the cutter disc, and the side surface processing groove is arranged on the groove bottom of the annular milling groove corresponding to the radial direction of the cutter disc, and each top surface processing groove and each side surface processing groove include a tool mounting groove and a clamping groove connected to the tool mounting groove to form an "L"-shaped structure, and at the same time, a locking hole is opened at the groove bottom of each clamping groove;

[0008] A blade is arranged in the tool mounting groove of each top surface processing groove and the side surface processing groove, the maximum surface of the blade in the top surface processing groove is located in a plane inclined with respect to the radial direction of the cutter disc, and the maximum surface of the blade in the side surface processing groove is located in a plane inclined with respect to the axial direction of the cutter disc;

[0009] It also includes a pressure block, each pressing groove is provided with a pressure block, and a side surface of the pressure block close to the tool mounting groove is an inclined pressing surface, and when the pressure block is placed in the tool mounting groove, the inclination direction of the pressing surface is consistent with the inclination direction of the blade in the top surface processing groove and the side surface processing groove. At the same time, the pressure block is provided with a mounting hole corresponding to the locking hole, and the corresponding locking hole and mounting hole are connected by screws.

[0010] In the above-mentioned rail online repair milling cutter, a plurality of top surface processing grooves in the same group of cutter grooves are arranged along a spiral line, and the angle between the spiral line and the axis of the cutter disc is in the range of 18-35°.

[0011] In the above-mentioned rail online repair milling cutter, along the circumference of the cutter disc, the top surface processing grooves and the side surface processing grooves in two adjacent groups of cutter grooves are arranged in a staggered manner.

[0012] In the above-mentioned rail online repair milling cutter, when the pressing block is installed in the clamping groove in the top surface processing groove, the bottom surface of the pressing block is arranged perpendicular to the radial direction of the cutter disc.

[0013] In the above-mentioned rail online repair milling cutter, a protrusion is provided on the top surface of the pressing block and on the side where the pressing surface is provided, and the pressing surface extends onto the protrusion.

[0014] In the above-mentioned rail online repair milling cutter, the screw is a hexagon socket countersunk screw.

[0015] In the above-mentioned rail online repair milling cutter, there is a concave chip removal groove on the groove bottom of the annular milling groove and each group of tool grooves corresponds to the chip removal groove, and each top surface processing groove and side surface processing groove of the same group are connected in series.

[0016] In the above-mentioned rail online repair milling cutter, an inwardly concave notch is arranged on the bottom of the annular milling groove and beside each group of cutter grooves, and a number is engraved on the wall of each notch.

[0017] In the above-mentioned rail online repair milling cutter, an avoidance slope is selectively provided on the groove edge of the annular milling groove and between the side processing grooves in two adjacent groups of grooves.

[0018] In the above-mentioned rail online repair milling cutter, a transition groove is provided at the corner of each tool installation groove, and the transition groove is a hole whose one side is connected to the tool installation groove.

[0019] The positive effects of the above technical solution are:

[0020] The above-mentioned rail online repair milling cutter has a plurality of groups of tool grooves distributed in an array on the outer edge of the integrated cutter disc, each tool groove includes a plurality of top surface processing grooves and a plurality of side surface processing grooves, and a blade is arranged in each top surface processing groove and each side surface processing groove, thereby realizing direct installation of the blade on the cutter disc, avoiding the need to arrange a tool seat on the cutter disc and then arrange the blade on the tool seat, and effectively eliminating the problem of affecting assembly accuracy due to the arrangement of an intermediate structure between the blade and the cutter disc. At the same time, the maximum surface of the blade in the top surface processing groove is located in a plane inclined with the radial direction of the cutter disc, and the maximum surface of the blade in the side surface processing groove is located in a plane inclined with the axial direction of the cutter disc, so that when the cross section of the rail is used as a reference, each blade is arranged flat, so that in the cutting direction, the contact area of ​​the cutter disc with the blade is larger, the supporting performance is better, the blade installation is more stable, the cutting resistance is smaller, and the milling efficiency is higher. At the same time, a pressure block with an inclined clamping surface is provided on the side of each blade. The pressure block presses the blade to prevent the problem of punching holes on the blade and affecting the structural strength of the blade, thereby extending the service life of the blade and reducing the frequency of blade replacement. The pressure block can also be loosened to meet the need for quick disassembly of the blade, facilitate blade replacement, and is more suitable for continuous repair of long rails. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of an embodiment of a rail online repair milling cutter of the present invention;

[0022] Figure 2 for Figure 1 A magnified view of part A;

[0023] Figure 3 A structural diagram of a cutter disc according to a preferred embodiment of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of part B;

[0025] Figure 5 A structural diagram of a blade according to a preferred embodiment of the present invention;

[0026] Figure 6 A structural diagram of a pressing block according to a preferred embodiment of the present invention;

[0027] Figure 7 This is a structural diagram of a preferred embodiment of the present invention when the pressing block and the blade are installed.

[0028] In the attached drawings: 1. Cutter disc; 11. Annular milling groove; 12. Cutter groove; 13. Chip removal groove; 14. Notch; 15. Avoidance slope; 121. Top surface processing groove; 122. Side surface processing groove; 1211. Tool mounting groove; 1212. Pressing groove; 1213. Locking hole; 1214. Transition groove; 2. Blade; 3. Pressing block; 31. Pressing surface; 32. Mounting hole; 33. Protrusion; 4. Screw. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 7 The technical solution provided by the present invention is described in detail, but the following content is not intended to limit the present invention.

[0030] Figure 1 It is a structural diagram of an embodiment of a rail online repair milling cutter of the present invention; Figure 2 for Figure 1 This is an enlarged view of part A. Figure 1 and Figure 2 As shown, the rail online repair milling cutter provided in this embodiment includes: a cutter disc 1 and a blade 2 installed on the cutter disc 1. When working, the blade 2 is installed on the cutter disc 1, and then the cutter disc 1 is installed on the driving shaft of the rail milling vehicle. Through the rotation of the cutter disc 1, the blade 2 contacts and mills the surface of the rail, thereby realizing the repair of the rail surface.

[0031] Figure 3 A structural diagram of a cutter disc according to a preferred embodiment of the present invention; Figure 4 for Figure 3 This is an enlarged view of part B. Figure 1 and Figure 2 as well as Figure 3 and Figure 4 As shown, the cutter disc 1 is wheel-shaped, and at this time, a concave annular milling groove 11 is provided on the wheel surface of the cutter disc 1 and on one side thereof, and the groove bottom contour line of the annular milling groove 11 is arranged in an "L" shape in the longitudinal section where the radial direction of the cutter disc 1 is located, that is, a structure with a low height on one side and a high height on the other side is formed, simulating the wheel structure of a train, so that when the cutter disc 1 contacts the rail to be repaired later, the top surface and one side surface of the rail can be wrapped, that is, the rail is wrapped in two directions, thereby realizing the repair of the contact surface between the rail and the train wheel, and the structural design is more reasonable.

[0032] Specifically, the two directions of the groove bottom of the annular milling groove 11 correspond to the radial direction and the axial direction of the cutter disc 1, respectively, forming a half-enclosed structure. At the same time, a plurality of groups of cutter grooves 12 are arranged in an annular array on the groove bottom of the annular milling groove 11, that is, a plurality of groups of cutter grooves 12 are distributed correspondingly at the position where the surface of the rail is subsequently wrapped, providing conditions for the subsequent milling of the surface of the rail by the blades 2 installed in the cutter grooves 12. In addition, each group of cutter grooves 12 includes a plurality of top surface processing grooves 121 and a plurality of side surface processing grooves 122. At the same time, the top surface processing grooves 121 are arranged on the groove bottom of the annular milling groove 11 corresponding to the axial direction of the cutter disc 1, so as to meet the top surface repair requirements of the rail, and the side surface processing grooves 122 are arranged on the groove bottom of the annular milling groove 11 corresponding to the radial direction of the cutter disc 1, so as to meet the side surface repair requirements of the rail. Each top surface processing groove 121 and each side surface processing groove 122 includes a tool installation groove 1211 and a clamping groove 1212 connected to the tool installation groove 1211. At this time, the tool installation groove 1211 and the clamping groove 1212 in the same top surface processing groove 121 form an approximately "L"-shaped structure, which provides conditions for the subsequent pressure block 3 set in the clamping groove 1212 to contact and clamp the blade 2 located in the tool installation groove 1211. At the same time, a locking hole 1213 is opened at the bottom of each clamping groove 1212, so that the locking hole 1213 can be away from the tool installation groove 1211, which can not only avoid interference with the structure of the blade 2 itself, but also provide locking conditions for the subsequent installation of the pressure block 3, and the structural design is more reasonable.

[0033] Figure 5 FIG. 2 is a structural diagram of a blade of a preferred embodiment of the present invention. Figures 1 to 5As shown, a blade 2 is arranged in the tool installation groove 1211 of each top surface processing groove 121 and side surface processing groove 122. The blade 2 is a flat rectangular block structure, and the edge of the blade 2 is a cutting edge. At this time, the maximum surface of the blade 2 arranged in the top surface processing groove 121 is located in a plane arranged obliquely with the radial direction of the cutter disc 1, and at the same time, the maximum surface of the blade 2 arranged in the side surface processing groove 122 is located in a plane arranged obliquely with the axial direction of the cutter disc 1, which can not only ensure the cutting angle, but also make the large surface of the blade 2 in a direction approximately perpendicular to the milling direction, that is, when the cross section of the rail is used as a reference, each blade 2 is arranged flat, so that in the cutting direction, the contact area of ​​the cutter disc 1 to the blade 2 is larger, so that the support performance of the cutter disc 1 to the blade 2 is better, the installation of the blade 2 is more stable, the cutting resistance is smaller, and the milling efficiency is higher. It is worth pointing out that since the tool installation groove 1211 in the top surface processing groove 121 is directly processed on the cutter disc 1, the direct installation of the blade 2 on the cutter disc 1 is realized, avoiding the problem of the existing structure that the tool holder needs to be installed on the cutter disc 1 first, and then the blade 2 is installed on the tool holder, which results in the need to set an intermediate structure between the blade 2 and the cutter disc 1. The problem of affecting the assembly accuracy due to too many assembly structures is effectively avoided. The processing accuracy can be appropriately reduced under the same accuracy requirements, and the processing is more convenient. In addition, installing the blade 2 on the cutter disc 1 can also ensure the structural strength and extend the service life.

[0034] Figure 6 A structural diagram of a pressing block according to a preferred embodiment of the present invention; Figure 7 FIG. 1 is a structural diagram of a preferred embodiment of the present invention when the pressing block and the blade are installed. Figures 1 to 4 as well as Figure 6 and Figure 7As shown, a pressing block 3 is arranged in each pressing groove 1212. At this time, one side of the pressing block 3 close to the tool installation groove 1211 is an inclined pressing surface 31, and the inclination angle of the pressing surface 31 on the pressing block 3 is consistent with the inclination angle between the maximum surface of the corresponding blade 2 and the radial or axial direction of the cutter disc 1, that is, when the pressing block 3 is placed in the tool installation groove 1211, the inclination direction of the pressing surface 31 is consistent with the inclination direction of the blade 2 in the top surface processing groove 121 and the side processing groove 122, which provides conditions for the subsequent wedge-shaped pressing of the blade 2 by the pressing block 3. At the same time, a mounting hole 32 corresponding to the locking hole 1213 is opened on the pressing block 3, and when the pressing block 3 is installed in the pressing groove 1212 and presses the corresponding blade 2, a screw 4 connects the mounting hole 32 on the pressing block 3 with the locking hole 1213 on the groove bottom of the pressing groove 1212, so as to achieve stable installation of the pressing block 3 in the pressing groove 1212. It is worth pointing out that since the blade 2 is pressed in the tool mounting groove 1211 by the pressing block 3, and the pressing block 3 is locked in the pressing groove 1212 by the screw 4, and at the same time, there is no direct connection structure between the pressing block 3 and the blade 2, when the pressing block 3 is loosened by the screw 4, the blade 2 can be taken out by only leaving a gap between the pressing block 3 and the blade 2, and there is no need to completely disassemble the screw 4 and the pressing block 3 before removing the blade 2. The blade 2 is more convenient to disassemble and assemble, and the blade 2 is easy to replace.

[0035] More specifically, several top surface processing grooves 121 in the same group of tool grooves 12 are arranged along a spiral line, and the angle between the spiral line and the axis of the cutter disc 1 is in the range of 18-35°. Preferably, the angle between the spiral line and the axis of the cutter disc 1 is 26°, which can not only maintain a larger cutting angle and improve milling efficiency, but also make the resonance performance of the tool better, effectively reduce the cutting heat of the tool, and extend the use time of a single tool, thereby reducing the frequency of tool replacement, and is further suitable for the continuous repair of long-length rails, with higher repair efficiency, lower use cost, and more convenience.

[0036] More specifically, since each group of cutter grooves 12 includes a plurality of top surface processing grooves 121 and a plurality of side surface processing grooves 122, in order to ensure that the blades 2 and the pressure blocks 3 in each processing groove are smoothly arranged and do not interfere with each other, intervals are provided between the plurality of top surface processing grooves 121 in the same group, between the plurality of side surface processing grooves 122, and between the top surface processing grooves 121 and the side surface processing grooves 122. At this time, along the circumference of the cutter head 1, the top surface processing grooves 121 and the side surface processing grooves 122 in two adjacent groups of cutter grooves 12 are arranged in a mutually staggered manner, that is, the interval between the top surface processing grooves 121 and the side surface processing grooves 122 in the previous group of cutter grooves 12 will be supplemented by the top surface processing grooves 121 and the side surface processing grooves 122 in the next group of cutter grooves 12, thereby achieving full coverage of the cutting section and ensuring the repair effect on the rail surface.

[0037] More specifically, when the pressure block 3 is installed in the clamping groove 1212 in the top surface processing groove 121, at this time, the bottom surface of the pressure block 3 is perpendicular to the radial arrangement of the cutter disc 1, which ensures that the arrangement direction of the pressure block 3 is completely located in the tangential direction of the cutter disc 1, and can ensure the uniqueness of the direction in which the force of the cutter disc 1 acts on the pressure block 3, so that the pressure block 3 is installed more stably in the clamping groove 1212, thereby more reliably clamping the blade 2, and the structural design is more reasonable.

[0038] More specifically, a protrusion 33 is provided on the top surface of the pressing block 3 and on the side where the pressing surface 31 is provided, so that the thickness of the side of the pressing block 3 close to the blade 2 is larger. At this time, the pressing surface 31 on the pressing block 3 is extended to the protrusion 33, further expanding the contact area between the pressing block 3 and the blade 2, so that the pressing block 3 can provide a more stable support force for the blade 2, ensuring that the blade 2 is installed more stably. Preferably, a smooth transition is adopted between the top surface of the protrusion 33 and the top surface of the other side of the pressing block 3, which can ensure the flatness of the top surface of the pressing block 3, effectively prevent the problem of waste chips being easily left in the subsequent milling process, and the structural design is more reasonable.

[0039] More specifically, the screw 4 used to install the pressure block 3 in the clamping groove 1212 is a hexagon socket countersunk screw 4, which can not only meet the installation and connection requirements, but also prevent the problem of the end protruding and interfering with milling, and the structural design is more reasonable.

[0040] More specifically, a plurality of recessed chip grooves 13 are provided on the bottom of the annular milling groove 11. At this time, each group of tool grooves 12 corresponds to a chip groove 13, and a chip groove 13 connects each top surface processing groove 121 and side surface processing groove 122 of the same group in series, so that the waste chips generated by the blade 2 in each top surface processing groove 121 and side surface processing groove 122 of the same group during the milling process can be avoided through the corresponding chip groove 13, which is convenient for the rapid discharge of waste chips and the structural design is more reasonable.

[0041] More specifically, a plurality of concave notches 14 are provided on the bottom of the annular milling groove 11. At this time, one notch 14 corresponds to a group of tool grooves 12, and the notch 14 is located beside the corresponding tool groove 12. At the same time, a number corresponding to the numbering information of the corresponding group of tool grooves 12 is engraved on the wall of each notch 14, which is conducive to the subsequent disassembly and assembly and maintenance of the tool, and the structural design is more reasonable.

[0042] More specifically, a plurality of avoidance slopes 15 are provided on the groove edge of the annular milling groove 11 of the cutter disc 1. At this time, the avoidance slope 15 is located between the side processing grooves 122 in two adjacent groups of cutter grooves 12. It is worth pointing out that only when the cutting edge of the blade 2 in the side processing groove 122 of the latter group of cutter grooves 12 is blocked by the groove edge between the side processing grooves 122 in the former group of cutter grooves 12 in the rotation direction of the cutter disc 1, the groove edge will be set as the avoidance slope 15, thereby ensuring the normal operation of the blade 2 in the latter group of cutter grooves 12.

[0043] More specifically, a transition groove 1214 is provided at the corner of each tool mounting groove 1211, and the transition groove 1214 is a hole connected to the tool mounting groove 1211 on one side. That is, by drilling a hole at the corner of the tool mounting groove 1211, the corner of the tool mounting groove 1211 is avoided, and the processing of the groove wall of the tool mounting groove 1211 is facilitated, thereby facilitating the improvement of the accuracy of the installation of the blade 2 in the tool mounting groove 1211 and ensuring the accuracy of the installation position of the blade 2.

[0044] The rail online repair milling cutter provided in the present embodiment comprises a cutter disc 1, a blade 2 and a pressing block 3; an annular milling groove 11 arranged in an "L" shape is provided on the wheel surface of the wheel-shaped cutter disc 1, and a plurality of groups of cutter grooves 12 including a top surface processing groove 121 and a side surface processing groove 122 are provided on the groove bottom of the annular milling groove 11, and after the blade 2 is installed in the top surface processing groove 121 and the side surface processing groove 122, the large surface of the blade 2 in the top surface processing groove 121 is arranged in a plane inclined with respect to the radial direction of the cutter disc 1, and the large surface of the blade 2 in the side surface processing groove 122 is arranged in a plane inclined with respect to the axial direction of the cutter disc 1, so that in the cross-sectional view of the rail, the cutter disc 1 is provided with a plurality of cutter grooves 12 including a top surface processing groove 121 and a side surface processing groove 122. When the surface is used as the reference, each blade 2 is arranged flat, so that in the cutting direction, the contact area between the cutter head 1 and the blade 2 is larger, the support performance of the blade 2 is better, the clamping is more stable, the cutting resistance is smaller, and the milling efficiency is higher. At the same time, each blade 2 is installed by pressing with a pressing block 3 with a screw 4, which can prevent the blade 2 from being punched and affecting the structural strength, extend the service life of the blade 2, and reduce the replacement frequency of the blade 2. At the same time, there is no structure that directly passes through the blade 2, so that the blade 2 can be taken and placed when the pressing block 3 is slightly loose, and the blade 2 is more convenient to replace, which is suitable for the continuous repair of long-length rails.

[0045] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A rail online repair milling cutter, comprising a cutter disc and a blade, characterized in that: The cutter disc is wheel-shaped, and an inwardly concave annular milling groove is arranged on one side of the wheel surface of the cutter disc, and the groove bottom contour line of the annular milling groove is arranged in an "L" shape. At the same time, the two directions of the groove bottom of the annular milling groove correspond to the radial direction and the axial direction of the cutter disc respectively, and a plurality of groups of cutter grooves are arranged in an annular array on the groove bottom of the annular milling groove, and each group of the cutter grooves includes a plurality of top surface processing grooves and a plurality of side surface processing grooves. At the same time, the top surface processing groove is arranged on the groove bottom of the annular milling groove corresponding to the axial direction of the cutter disc, and the side surface processing groove is arranged on the groove bottom of the annular milling groove corresponding to the radial direction of the cutter disc, and each of the top surface processing grooves and each of the side surface processing grooves includes a tool mounting groove and a clamping groove connected to the tool mounting groove to form an "L"-shaped structure. At the same time, a locking hole is opened at the groove bottom of each of the clamping grooves; A blade is disposed in the tool mounting groove of each of the top surface processing groove and the side surface processing groove, the largest surface of the blade in the top surface processing groove is located in a plane inclined with respect to the radial direction of the cutter disc, and the largest surface of the blade in the side surface processing groove is located in a plane inclined with respect to the axial direction of the cutter disc; It also includes a pressing block, each of the pressing grooves is provided with a pressing block, a side of the pressing block close to the tool installation groove is an inclined pressing surface, and when the pressing block is placed in the tool installation groove, the inclination direction of the pressing surface is consistent with the inclination direction of the blade in the top surface processing groove and the side surface processing groove, and at the same time, the pressing block is provided with a mounting hole corresponding to the locking hole, and the corresponding locking hole and the mounting hole are connected by screws; A plurality of the top surface processing grooves in the same group of the tool grooves are arranged along a spiral line, and the angle between the spiral line and the axis of the tool disc is in the range of 26°; Along the circumference of the cutter disc, the top surface processing grooves and the side surface processing grooves in two adjacent groups of the cutter grooves are arranged in a staggered manner; an avoidance slope is selectively arranged on the groove edge of the annular milling groove and between the side surface processing grooves in two adjacent groups of the cutter grooves; only when the cutting edge of the blade in the side surface processing groove of the latter group of the cutter grooves is blocked by the groove edge between the side surface processing grooves in the former group of the cutter grooves in the rotation direction of the cutter disc, the groove edge will be set as the avoidance slope.

2. The rail online repair milling cutter according to claim 1, characterized in that: When the pressing block is installed in the pressing groove in the top surface processing groove, the bottom surface of the pressing block is arranged perpendicular to the radial direction of the cutter disc.

3. The rail online repair milling cutter according to claim 1, characterized in that: A protrusion is arranged on the top surface of the pressing block and on the side where the pressing surface is arranged, and the pressing surface extends onto the protrusion.

4. The rail online repair milling cutter according to claim 1, characterized in that: The screw is a hexagon socket countersunk screw.

5. The rail online repair milling cutter according to claim 1, characterized in that: On the groove bottom of the annular milling groove and each group of the tool grooves corresponds to a concave chip removal groove, and the chip removal groove connects each of the top surface processing grooves and the side surface processing grooves of the same group in series.

6. The rail online repair milling cutter according to claim 1, characterized in that: An inwardly concave notch is arranged on the bottom of the annular milling groove and beside each group of the knife grooves, and a number is engraved on the wall of each notch.

7. The rail online repair milling cutter according to claim 1, characterized in that: A transition groove is provided at the corner of each tool installation groove, and the transition groove is a hole whose side is connected to the tool installation groove.

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