Integrated milling cutter for machining turnout steel rail

Abstract

The integrated milling cutter for machining the turnout steel rail is provided with a cutter body, and the cutter body is composed of a rail top arc cutter body and a rail head working edge cutter body which are concentrically and integrally formed; the rail top arc cutter body is provided with an arc working face, and the rail head working edge cutter body is provided with an inclined working face. A plurality of rail top arc processing blades are mounted on the arc working surface in a sinking manner; a plurality of rail top working edge processing blades are mounted on the inclined working surface; the rail top arc machining blade and the rail top working edge machining blade are connected with the cutter body through plum blossom screws respectively. The cutter body is further provided with a rail top arc milling chip groove and a rail top working edge milling chip groove. The rail head working edge milling cutter and the rail top arc milling cutter are integrated, and the rail top working edge and the rail top arc of the steel rail are milled and formed at a time, so that the machining efficiency is improved, and the machining quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of milling cutter technology for machine tools used in transportation, and specifically relates to an integrated milling cutter for processing turnout rails. Background Technology

[0002] Milling cutters are indispensable tools in the rail processing of turnout production workshops. Currently, CNC milling machines mostly use split-type cutters for machining the working edge of the turnout switch rail head, that is, cutters divided into sections such as... Figure 1 The rail head end mill shown is used to machine the side of the rail head. After machining the side of the rail head to the dimensions shown in the drawing, it needs to be replaced and reused. Figure 2 The shown rail top arc milling cutter is used to machine the rail top arc. To meet the machining requirements, the rail top arc needs to be repeatedly precision milled to ensure that the final rail head profile meets the standard requirements. Using two different milling cutters for machining not only requires disassembly and replacement of the cutters, but also control of the rail head width and height to meet dimensional requirements. Furthermore, it is necessary to control the smoothness of the overlap between the rail head arc and the working edge. Only after multiple repairs can the rail head profile meet the standard requirements, resulting in low machining efficiency. Therefore, the following improved technical solution is proposed. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an integrated milling cutter for processing turnout rails, which adopts an integrated rail head working edge milling cutter and a rail top arc milling cutter to process the rail top surface and working edge in one step, thus solving the technical problem of how to achieve efficient, high-quality and convenient processing of the working edge and rail top arc of turnout rails.

[0004] The technical solution adopted in this utility model is as follows: An integrated milling cutter for machining turnout rails, comprising a cutter body, which is composed of an integrally formed rail-top arc cutter body and a rail-head working edge cutter body; the rail-top arc cutter body is concentrically located at the top of the rail-head working edge cutter body, and the outer diameter of the rail-top arc cutter body is larger than the outer diameter of the rail-head working edge cutter body; the rail-top arc cutter body has an arc working surface that conforms to the arc of the turnout rail top, and the rail-head working edge cutter body has an inclined working surface that conforms to the working edge of the turnout rail head, and the arc working surface and the inclined working surface are smoothly connected as one piece; the arc working surface... Several rail-top arc machining inserts are installed on the working surface in a recessed manner, and the machining line of the rail-top arc machining inserts is consistent with the arc line of the arc working surface; several rail-top working edge machining inserts are installed on the inclined working surface, and the machining line of the rail-top working edge machining inserts is consistent with the inclined line of the inclined working surface; the rail-top arc machining inserts and the rail-top working edge machining inserts are respectively connected to their respective tool bodies with Torx screws; the rail-top arc machining inserts adjacent to the rail-top are provided with rail-top arc milling chip removal grooves, and the rail-top working edge machining inserts adjacent to the rail-top are provided with rail-top working edge milling chip removal grooves.

[0005] In the above technical solution, furthermore: the rail top arc machining insert and the rail top working edge machining insert are respectively arranged alternately at a certain distance along the axial direction of the tool body.

[0006] In the above technical solution, the preferred option is that the guide top arc machining insert consists of a flat insert and an arc-shaped insert.

[0007] In the above technical solution, the preferred option is that the cutting tool for machining the working edge of the rail top mainly includes a flat cutting tool.

[0008] In the above technical solution, the preferred embodiment is that the middle part of the tool body is connected to the broaching device of the CNC milling machine spindle via a special tool holder and a broaching pin.

[0009] In the above technical solutions, the preferred material for the blade is cemented carbide or high-speed steel.

[0010] In the above technical solution, further: the bottom of the working edge of the rail head cutter body and its inclined working surface are provided with a transition arc.

[0011] In the above technical solution, the preferred method is to install a machining insert for the working edge of the rail top within the transition arc, and the machining insert for the working edge of the rail top is equipped with a milling chip removal groove for the working edge of the rail top.

[0012] In the above technical solution, the preferred option is a transition arc radius of R16mm.

[0013] In the above technical solution, the preferred configuration is: the radius of the arc working surface is R13mm; the angle between the inclined working surface and the central axis of the tool body is 7° or 14°.

[0014] Advantages of this utility model compared to the prior art:

[0015] 1. Based on the original milling cutter size specifications and combined with the characteristics of the milling machine structure, this utility model integrates the rail head working edge milling cutter and the rail top arc milling cutter into one piece, and performs one-time milling of the rail top working edge and the rail top arc, thereby improving processing efficiency and ensuring processing quality.

[0016] 2. The blade of this utility model is connected to the blade body by a Torx screw, which provides a stable connection, is easy to install and maintain, has excellent adaptability and flexibility, can improve processing accuracy and efficiency, and enhance safety.

[0017] 3. This utility model, by staggering two types of cutting inserts, can complete the machining of the rail top arc and the working edge of the rail top in a single clamping, reducing the number of tool changes and improving machining efficiency; the staggered arrangement of the inserts makes the machining path more reasonable, reducing the idle travel of the tool during machining; the staggered arrangement design avoids mutual interference between the two types of inserts during machining, ensuring machining accuracy and stability; since the inserts are spaced apart along the axial direction of the tool body, the force on the tool is more uniform during machining, reducing machining errors caused by uneven force; during machining, the staggered arrangement of the inserts can more effectively disperse impact force, reducing tool damage caused by impact.

[0018] 4. The design of this utility model, in which the middle part of the tool body is connected to the broaching device of the CNC milling machine spindle through a special tool holder and a broaching pin, has many technical advantages, such as high precision and stability, efficient tool changing and convenient maintenance, enhanced tool adaptability, improved processing efficiency and reduced costs, and enhanced safety and reliability.

[0019] 5. The cemented carbide cutting tool body of this utility model is known for its high hardness, wear resistance, high thermal stability and good corrosion resistance, and is suitable for machining steel rails with high hardness or high toughness; while the high-speed steel cutting tool body is suitable for manufacturing tools with complex shapes due to its high hardness, red hardness, excellent toughness and impact resistance, as well as good processing performance.

[0020] 6. The transition arc formed between the bottom of the tool body and the inclined working surface of the rail head working edge of this utility model enables the tool to exhibit higher machining accuracy, surface quality, stability and durability during the machining of the rail head working edge. At the same time, it improves machining efficiency, reduces production costs, enhances the adaptability and flexibility of the tool, and enables it to be more widely used in the machining of workpieces of different shapes and sizes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the existing lower rail head working edge milling cutter structure;

[0022] Figure 2 This is a schematic diagram of the existing technology's bottom rail top arc end mill structure;

[0023] Figure 3 This is a schematic diagram of the integrated milling cutter structure of this utility model;

[0024] In the diagram: 1-Tool body, 1-1 Rail top arc tool body, 1-2 Rail head working edge tool body, 2-Arc working surface, 3-Inclined working surface, 4-Rail top arc machining insert, 5-Rail top working edge machining insert, 6-Torch screw, 7-Rail top arc milling chip removal groove, 8-Rail top working edge milling chip removal groove, 9-Transition arc. Detailed Implementation

[0025] The following will describe the embodiments of this utility model and the accompanying drawings. Figure 3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] An integral milling cutter for machining turnout rails, (e.g.) Figure 3 As shown, it has a cutter body 1. The cutter body 1 is composed of an integrally formed rail top arc cutter body 1-1 and a rail head working edge cutter body 1-2. The rail top arc cutter body 1-1 is concentrically located on the top of the rail head working edge cutter body 1-2, and the outer diameter of the rail top arc cutter body 1-1 is larger than the outer diameter of the rail head working edge cutter body 1-2; the rail top arc cutter body 1-1 has an arc working surface 2 that conforms to the arc of the top of the turnout rail, and the rail head working edge cutter body 1-2 has an inclined working surface 3 that conforms to the working edge of the turnout rail head, and the arc working surface 2 and the inclined working surface 3 are smoothly connected as one piece.

[0027] It should be noted that the one-piece molded cutter body 1 can achieve integrated molding of the rail top arc cutter body and the rail head working edge cutter body through advanced forming technologies such as additive manufacturing. Furthermore, the one-piece molded cutter body has an integral structure without weak points at joints. This structure makes the cutter body more stable and reliable during use, capable of withstanding greater cutting forces and impacts. The one-piece molded cutter body typically employs a monolithic design, without redundant connecting parts or gaps. This design makes the cutter body operate more smoothly, reducing jamming and wear caused by loose connecting parts or gaps. The one-piece molded cutter body is suitable for a variety of cutting tasks; its robust and durable characteristics and high-precision cutting capabilities allow it to perform excellently in various application scenarios.

[0028] The circular arc working surface 2 is equipped with several rail top circular arc machining blades 4 installed in a recessed manner, and the machining line shape of the rail top circular arc machining blades 4 is consistent with the circular arc line shape of the circular arc working surface 2, for one-time forming to realize the machining of the rail top circular arc. Similarly, the inclined working surface 3 is equipped with several rail top working edge machining blades 5, and the machining line shape of the rail top working edge machining blades 5 is consistent with the inclined line shape of the inclined working surface 3; for one-time forming to realize the machining of the rail top working edge.

[0029] It should be noted that because the profile of the machining insert matches the profile of the corresponding working surface, the top surface and working edge profile of the rail can be formed in one step, eliminating the need for multiple re-grinding and adjustments, thus greatly improving processing efficiency. One-step forming reduces errors caused by multiple re-grinding and adjustments, ensuring high machining precision, which is especially important for high-precision parts such as rails. One-step forming reduces tool wear and impact, extending tool life. Extended tool life reduces the frequency of tool replacement, thereby lowering production costs. Simultaneously, one-step forming also reduces the additional costs incurred by multiple re-grinding and adjustments. One-step forming ensures the smoothness and precision of the machined surface, improving machining quality. The close fit between the machining insert and the corresponding working surface enhances machining stability and reduces machining errors caused by tool loosening or wear. One-step forming reduces operation steps and re-grinding time, making operation more convenient. The reduction in multiple re-grinding and adjustments lowers safety risks caused by improper operation. At the same time, the tight fit of the cutting tools also reduces the safety hazards caused by tool loosening. This design is suitable for various track processing needs, and can achieve one-time forming processing for both curved and inclined surfaces.

[0030] The rail top arc machining insert 4 and the rail top working edge machining insert 5 are respectively connected to their respective tool bodies using Torx screws 6.

[0031] It's important to note that the design of the Torx 6 screw provides superior tightening force and resistance to loosening. Its hexagonal shape ensures a better closure, resulting in a stronger and less prone-to-loose connection. In high-precision and demanding machining tasks such as rail machining, a secure connection of cutting tools is crucial. The Torx 6 screw provides a reliable connection, ensuring that the cutting tool will not loosen or fall off due to vibration or impact during machining. Installing the Torx 6 screw is relatively simple; a standard hex wrench or socket wrench can be used for tightening. This greatly simplifies the cutting tool installation process and improves work efficiency. When cutting tools need to be replaced or adjusted, the Torx 6 screw allows for easy removal and reinstallation, reducing maintenance complexity and costs. The Torx 6 screw is suitable for connecting cutting tools of various sizes and specifications; regardless of the size, shape, or material of the cutting tool, a suitable Torx screw can be found for connection. Because the tightening force of the Torx 6 screw is adjustable, the tightness of the cutting tool can be adjusted according to different machining requirements and workpiece shapes, providing greater flexibility to adapt to different machining scenarios and tasks. A secure insert connection ensures that the insert's position and angle remain constant during machining, thus improving machining accuracy and consistency. Because the Torx screw 6 provides a reliable connection, downtime and maintenance costs due to insert loosening or falling off are reduced, which improves machining efficiency and lowers production costs. A secure insert connection also reduces the risk of safety accidents caused by insert loosening or falling off, protecting operator safety and lowering the incidence of workplace injuries.

[0032] The tool 4, which is adjacent to the top of the rail, has a rail-top arc milling chip removal groove 7, and the tool 5, which is adjacent to the top of the rail, has a rail-top working edge milling chip removal groove 8.

[0033] It's important to note that the chip removal groove design allows for the rapid removal of chips generated during milling, preventing chip accumulation between the cutting tool and the workpiece surface. This helps maintain the sharpness of the cutting tool and the smoothness of the machined surface. The efficient chip removal capacity of the chip removal groove reduces downtime and tool change frequency caused by chip buildup, thereby improving machining efficiency. Timely chip removal by the chip removal groove reduces friction between chips and the cutting tool, thus lowering the tool wear rate, which helps extend tool life and reduce production costs. During milling, chip buildup can cause excessive pressure on the cutting tool, leading to chipping. The chip removal groove design helps prevent this, protecting the integrity of the cutting tool. Timely chip removal by the chip removal groove prevents chips from interfering with the machined surface, ensuring machining accuracy and consistency, which is especially important for high-precision machining of track components. Chip buildup can affect the smoothness and roughness of the machined surface. The chip removal groove design helps maintain good quality of the machined surface, meeting customer quality requirements. The chip removal groove design allows the cutting tool to better adapt to workpieces of different materials and hardness. During machining, waste chips are quickly discharged, preventing excessive wear or damage to the cutting tools due to material differences. The automatic chip removal function of the chip chute reduces the need for manual chip cleaning, simplifies the operation process, and helps improve production efficiency and reduce labor costs. The design of the chip chute also makes the cutting tools easier to clean and inspect during maintenance, which helps to identify and solve problems in a timely manner and ensure the continuous and stable operation of the cutting tools.

[0034] In the above embodiments, the rail top arc machining blade 4 and the rail top working edge machining blade 5 are respectively arranged alternately at a certain distance along the axial direction of the tool body 1.

[0035] It should be noted that by staggering the two types of inserts, the machining of the rail top arc and the working edge of the rail top can be completed in a single clamping, thereby reducing the number of tool changes and improving machining efficiency. The staggered insert arrangement makes the machining path more rational, reducing the tool's idle travel during machining, further improving machining efficiency. The staggered arrangement design avoids mutual interference between the two types of inserts during machining, ensuring machining accuracy and stability. Because the inserts are spaced apart along the tool body axis, the force on the tool is more even during machining, reducing machining errors caused by uneven force. During machining, the staggered insert arrangement can more effectively disperse impact force, reducing tool damage caused by impact.

[0036] In the above embodiments, preferably, the rail top arc machining insert 4 is composed of a flat insert and an arc-shaped insert. In the above embodiments, preferably, the rail top working edge machining insert 5 mainly includes a flat insert for milling the rail top working edge; if necessary, the rail top working edge machining insert 5 may also include an arc-shaped insert.

[0037] In the above embodiments, preferably, the middle part of the cutter body 1 is connected to the broaching device of the CNC milling machine spindle via a special tool holder and a broaching pin.

[0038] It should be noted that the dedicated tool holder and pull stud design ensures a precise connection between the tool body and the CNC milling machine spindle, reducing machining errors caused by loose connections or excessive clearance. The tight fit between the tool holder and pull stud, along with the stability of the broaching device, ensures tool stability during high-speed, high-precision machining, minimizing vibration or misalignment. The dedicated tool holder and pull stud design simplifies tool changing; operators can quickly connect and disconnect the tool holder from the spindle using standard tools, improving work efficiency. It also allows for rapid tool replacement when worn or damaged, reducing downtime and maintenance costs. The tight connection between the dedicated tool holder and pull stud ensures tool stability during high-speed rotation, increasing machining speed and thus production efficiency. By reducing production interruptions due to tool damage and downtime for maintenance, and by extending tool life, this design helps reduce production costs. Finally, the dedicated tool holder and pull stud design reduces potential safety risks caused by tool loosening or falling off, ensuring operator safety. The tight fit between the tool holder and the pull stud, along with the stability of the pull stud mechanism, ensures that the tool maintains a stable and reliable working state during machining, reducing production interruptions caused by tool failure.

[0039] In the above embodiments, preferably, the blade body 1 is made of cemented carbide or high-speed steel.

[0040] It's important to note that cemented carbide has extremely high hardness, typically above HRA90, and excellent wear resistance. This allows cemented carbide tool bodies to maintain sharpness for a longer period during machining, reducing tool wear and extending service life. Cemented carbide maintains high hardness even at high temperatures, exhibiting good thermal stability. This allows cemented carbide tool bodies to maintain excellent cutting performance in high-speed cutting or high-temperature machining environments. Through the addition of binder metal, cemented carbide retains high hardness while also possessing a certain degree of strength and toughness. This allows cemented carbide tool bodies to withstand significant cutting and impact forces, making them suitable for machining materials with high hardness or high toughness. Cemented carbide has good corrosion resistance, maintaining stable cutting performance in humid or corrosive environments. High-speed steel has high hardness, typically between HRC60 and 66, and good red hardness. This allows high-speed steel tool bodies to maintain stable hardness even during high-speed cutting at temperatures exceeding 600°C. High-speed steel also has good toughness and impact resistance, enabling it to withstand significant cutting and impact forces. High-speed steel has good processing properties and is easy to process through heat treatment, forging, welding and other operations, which makes high-speed steel blades more flexible and machinable during the manufacturing process.

[0041] In the above embodiments, further: the bottom of the rail head working edge cutter body 1-2 and its inclined working surface 3 are provided with a transition arc 9. In the above embodiments, preferably: the rail top working edge machining insert 5 is installed recessed within the transition arc 9, and the rail top working edge machining insert 5 is equipped with a rail top working edge milling chip removal groove 8.

[0042] It should be noted that the design of the transition arc 9, identical to the structure of existing rail head working edge milling cutters, makes the cutting path smoother, reducing machining errors caused by abrupt changes in the cutting path. This helps improve the machining accuracy of the rail top working edge. The smooth transition of the transition arc 9 reduces resistance during the cutting process, making cutting smoother. This helps lower the cutting temperature, reduce tool wear, and thus improve the surface finish and roughness of the machined surface. The smooth connection between the transition arc 9 and the rail head working edge cutter body 1-2 enhances the rigidity of the tool, making it less prone to vibration or deformation during cutting. This helps improve the stability and durability of the tool. The design of the transition arc 9 makes it possible to optimize cutting parameters (such as cutting speed, feed rate, etc.). By reasonably adjusting the cutting parameters, machining efficiency and quality can be further improved. Furthermore, the rail top working edge machining insert 5 is recessed and installed within the transition arc 9. The rail top working edge machining insert 5 is equipped with a rail top working edge milling chip removal groove 8, enhancing the adaptability and flexibility of the tool, enabling it to be more widely used in the machining of rails of different shapes and sizes.

[0043] In the above embodiments, preferably, the radius of the transition arc 9 is R16mm. This is suitable for machining rails of models such as 50AT, 60AT, and 54E1A1. In the above embodiments, preferably, the radius of the arc working surface 2 is R13mm; the angle between the inclined working surface 3 and the central axis of the tool body is 7° or 14°. This is also suitable for machining rails of models such as 50AT, 60AT, and 54E1A1.

[0044] The working principle of this utility model is as follows: This utility model designs an integrated milling cutter, which is designed based on the size and structure of existing milling cutters and the characteristics of milling machine structures, integrating the machining of the rail head working edge and the rail top arc into a one-time forming process. The cutter body is connected to the CNC milling machine spindle broaching device via a dedicated tool holder and pull stud. After the rail arm and non-working edge of the rail head are machined, the milling machine issues specific programs and instructions, strictly controlling the cutting amount, feed rate, and spindle speed to machine the rail head working edge and rail top arc in one pass. After machining, a contour measuring instrument is used to sample the rail contour and compare it with a standard wheel. When the contour difference meets the iron standard requirements, it is a qualified product and can proceed to subsequent production.

[0045] As can be seen from the above description, this utility model effectively improves processing efficiency and ensures processing quality. The blade is connected to the blade body 1 by a Torx screw 6, which provides a stable connection, is easy to install and maintain, has excellent adaptability and flexibility, and can improve processing accuracy and efficiency while enhancing safety.

[0046] This invention utilizes a staggered arrangement of two types of cutting inserts to complete the machining of the rail top arc and the working edge of the rail top in a single clamping operation, reducing tool changes and improving machining efficiency. The staggered arrangement of the inserts makes the machining path more rational, reducing the idle travel of the tool during machining and further improving machining efficiency. The staggered arrangement design avoids mutual interference between the two types of inserts during machining, ensuring machining accuracy and stability. Because the inserts are spaced apart along the axial direction of the tool body, the force on the tool is more uniform during machining, reducing machining errors caused by uneven force. During machining, the staggered arrangement of the inserts can more effectively disperse impact force, reducing tool damage caused by impact.

[0047] The design of this utility model, in which the middle part of the cutter body 1 is connected to the broaching device of the CNC milling machine spindle via a special tool holder and a broaching pin, has many technical advantages, including high precision and stability, efficient tool changing and convenient maintenance, enhanced tool adaptability, improved processing efficiency and reduced costs, and enhanced safety and reliability.

[0048] The cemented carbide cutting tool body of this utility model is known for its high hardness, wear resistance, high thermal stability and good corrosion resistance, and is suitable for machining steel rails with high hardness or high toughness; while the high-speed steel cutting tool body is widely favored for its high hardness, red hardness, excellent toughness and impact resistance as well as good processing performance, and is suitable for manufacturing cutting tool bodies with complex shapes.

[0049] The transition arc 9 formed between the bottom of the tool body 1-2 and its inclined working surface 3 on the working edge of the rail head of this utility model enables the tool to exhibit higher machining accuracy, surface quality, stability and durability during the machining of the working edge of the rail head. At the same time, it improves machining efficiency and reduces production costs, enhances the adaptability and flexibility of the tool, and enables it to be more widely used in the machining of workpieces of different shapes and sizes.

[0050] It should be understood that although this specification describes one embodiment, it does not mean that the embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in this embodiment can also be appropriately arranged and combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated milling tool for switch rail machining, having a tool body (1), characterized in that: The tool body (1) is composed of a rail head top circular arc tool body (1-1) and a rail head working edge tool body (1-2); the rail head top circular arc tool body (1-1) is concentrically arranged at the top of the rail head working edge tool body (1-2), and the outer diameter of the rail head top circular arc tool body (1-1) is larger than that of the rail head working edge tool body (1-2); the rail head top circular arc tool body (1-1) is provided with a circular arc working surface (2) which is attached to the rail head top circular arc of the turnout rail, the rail head working edge tool body (1-2) is provided with an inclined working surface (3) which is attached to the rail head working edge of the turnout rail, and the circular arc working surface (2) and the inclined working surface (3) are smoothly connected as a whole; the circular arc working surface (2) is provided with a plurality of rail head top circular arc machining blades (4) which are installed in a sunken manner, and the machining line of the rail head top circular arc machining blade (4) is consistent with the circular arc line of the circular arc working surface (2); the inclined working surface (3) is provided with a plurality of rail head working edge machining blades (5), and the machining line of the rail head working edge machining blade (5) is consistent with the inclined line of the inclined working surface (3); the rail head top circular arc machining blade (4) and the rail head working edge machining blade (5) are connected to the tool body in which they are respectively arranged by using a wrench screw (6); a rail head top circular arc milling chip removal groove (7) is arranged adjacent to the rail head top circular arc machining blade (4), and a rail head working edge milling chip removal groove (8) is arranged adjacent to the rail head working edge machining blade (5).

2. The milling cutter according to claim 1, characterized in that: The rail head top circular arc machining blade (4) and the rail head working edge machining blade (5) are staggered and arranged at a certain distance along the axial direction of the tool body (1).

3. The milling cutter according to claim 1 or 2, characterized in that: The rail head top circular arc machining blade (4) is composed of a planar blade and an arc surface blade.

4. The milling cutter according to claim 1 or 2, characterized in that: The rail head working edge machining blade (5) mainly includes a planar blade.

5. The milling cutter according to claim 1 or 2, characterized in that: The middle part of the tool body (1) is connected to the draw tool device of the main shaft of the numerical control milling machine through a special tool handle and a draw pin.

6. The milling cutter according to claim 1 or 2, characterized in that: The tool body (1) is made of hard alloy material or high speed steel material.

7. The milling cutter according to claim 1, characterized in that: The bottom of the rail head working edge tool body (1-2) and the inclined working surface (3) thereof are provided with a transition circular arc (9).

8. The milling cutter according to claim 7, characterized in that: The rail head working edge machining blade (5) is installed in the transition circular arc (9) in a sunken manner, and is provided with a rail head working edge milling chip removal groove (8).

9. The milling cutter according to claim 7, characterized in that: The radius of the transition circular arc (9) is R16mm.

10. The milling cutter according to claim 1, characterized in that: The radius of the circular arc working surface (2) is R13mm; the angle between the inclined working surface (3) and the center axis of the tool body is 7°, 14°.

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