Steel rail inclined high manganese steel frog flash welding device and welding method

Abstract

The invention provides a steel rail inclined high manganese steel frog flash welding device and method. The device is composed of a flash welding machine welding platform, a high manganese steel frog positioning device and a steel rail positioning device. A high-manganese steel frog is positioned and placed at the fixed end of the flash welding machine welding platform through a high-manganese steel frog positioning device; a steel rail is positioned and placed at the movable end of the flash welding machine welding platform through a steel rail positioning device; and the high-manganese steel frog is aligned with the steel rails and is flash-welded according to flash-welding process requirements. According to the invention, high-precision flash welding of the steel rail inclined high-manganese steel frog is realized, and the flash welding process requirements of the steel rail inclined high-manganese steel frog are met; bumping generated by friction between train wheels and the contact surface of the welded high manganese steel frog is reduced; operation is simple, precision is reliable and guaranteed, original equipment electrodes and platform structures are not affected, and the method is suitable for popularization.

Description

Technical Field

[0001] The present invention specifically relates to a flash welding device and a welding method for a rail-inclined high manganese steel frog. Background Art

[0002] (As shown in Figure 1 ) The welded high manganese steel frog is composed of a high manganese steel frog 1 and a rail 2. The high manganese steel frog 1 needs to be welded to the rail 2 to achieve the seamless purpose. In the prior art, flash welding is used for the seamless connection of the high manganese steel frog and the rail. The high manganese steel frog and the rail are flash welded to form a seamless line extension for railway infrastructure construction.

[0003] (As shown in Figure 2 ) The high manganese steel frog 1 is formed by casting and machining to meet the requirements of the design drawing. According to the line design requirements, there are rail 2 inclined lines. Common inclinations are 1:20 and 1:40, which are the tangents of the angles formed between the running tread 3 and the Y-axis 4 of the rail.

[0004] (As shown in Figure 3) When designing the welded high manganese steel frog, the rail 2 is inclined and designed at the end of the high manganese steel frog 1, and the local inclination and transition section are obtained through machining. When flash welding the rail 2, it is necessary to align the rail 2 with the inclined end of the high manganese steel frog 1 for flash welding to meet the design of the rail-inclined high manganese steel frog (as shown in Figure 4 ).

[0005] The flash welding machine welding platform in the prior art is flat. Without a matching device and process design, it is impossible to perform flash welding on the rail-inclined high manganese steel frog. In this regard, the following improved technical solutions are proposed. Summary of the Invention

[0006] The technical problem solved by the present invention: Provide a flash welding device and a welding method for a rail-inclined high manganese steel frog to solve the high-precision flash welding technical problem of the rail-inclined high manganese steel frog on the flash welding machine welding platform.

[0007] The technical solution adopted by the present invention: A flash welding device for a rail-inclined high manganese steel frog, the device is composed of a flash welding machine welding platform, a high manganese steel frog positioning device, and a rail positioning device; the fixed end of the flash welding machine welding platform is positioned by the high manganese steel frog positioning device to place the high manganese steel frog; the movable end of the flash welding machine welding platform is positioned by the rail positioning device to place the rail; the high manganese steel frog is aligned with the rail and flash welded according to the requirements of the flash welding process.

[0008] In the above technical solution, further: The flash welding machine welding platform includes a fixed end and a movable end; the fixed end and the movable end are respectively composed of symmetric steel platforms and copper electrodes on the left and right; the fixed end is used to place the high manganese steel frog, and the movable end is used to place the rail.

[0009] In the above technical solution, preferably: the protruding electrode within the length range of 50 - 80 mm at the end of the high manganese steel frog is arranged in suspension.

[0010] In the above technical solution, further: the positioning device for the high manganese steel frog has a right-angle plate with an L-shaped structure; the outer vertical end face of the right-angle plate is the alignment surface for the welding end of the high manganese steel frog, and the alignment surface for the welding end of the high manganese steel frog is used to fit and place against the welding end face of the high manganese steel frog placed on the fixed end of the welding platform of the flash welding machine; a vertically arranged movable end electrode positioning plate is perpendicularly made on the lower end face of the horizontal plate body of the right-angle plate, and the outer vertical end face of the movable end electrode positioning plate is the alignment surface for the side of the movable end electrode, and the alignment surface for the side of the movable end electrode is used to position and fit against the outer vertical end face of the copper electrode at the movable end of the welding platform of the flash welding machine.

[0011] In the above technical solution, further: the rail positioning device has an integrally connected copper electrode inclined plate and a steel inclined plate; the slope of the inclined surface formed by the copper electrode inclined plate and the steel inclined plate matches the slope of the rail; the copper electrode inclined plate corresponds to and cooperates with the copper electrode, and the steel inclined plate corresponds to and cooperates with the steel platform; upwardly protruding straightening reference edges are provided on the outer sides of both the copper electrode inclined plate and the steel inclined plate; a convex platform for buckling with the steel platform is made at the bottom of the steel inclined plate.

[0012] The present invention also claims protection for a flash welding method for a high manganese steel frog with inclined rails. Using any of the devices, flash welding is carried out according to the requirements of the flash welding process, including the following steps:

[0013] Step 1, positioning the high manganese steel frog by the high manganese steel frog positioning device: Place the high manganese steel frog on the fixed end of the welding platform of the flash welding machine, place the high manganese steel frog positioning device on the movable end of the welding platform of the flash welding machine, and make the alignment surface for the welding end of the high manganese steel frog of the high manganese steel frog positioning device fit against the welding end face of the high manganese steel frog, and at the same time make the alignment surface for the side of the movable end electrode of the high manganese steel frog positioning device fit against the outer vertical end face of the copper electrode at the movable end of the welding platform of the flash welding machine. After the high manganese steel frog is positioned, remove the high manganese steel frog positioning device.

[0014] Step 2, positioning the rail positioning device: Place the rail positioning device on the movable end of the welding platform of the flash welding machine, and make the bottom convex platform of the rail positioning device buckle with the steel platform 9 at the movable end, and at the same time make the copper electrode inclined plate of the rail positioning device correspond to and be positioned with the copper electrode 10 at the movable end, and the steel inclined plate of the rail positioning device correspond to and be positioned with the steel platform at the movable end.

[0015] Step 3, positioning of the rail: Place the rail on the rail positioning device, and move the rail to align and position the end of the rail with the end of the high manganese steel frog.

[0016] Step 4, flash welding: Carry out flash welding according to the requirements of the flash welding process.

[0017] In the above technical solution, preferably: within a range of 500 mm before and after the weld, the flatness deviation of the top running surface is controlled within 0.1 - 0.3 mm / m, and the flatness deviation of the side guiding surface is controlled within -0.2 - 0.1 mm / m.

[0018] Advantages of the present invention compared with the prior art:

[0019] 1. The present invention realizes high-precision flash welding of a tilted high manganese steel frog, meeting the requirements of the flash welding process for a tilted high manganese steel frog.

[0020] 2. Within a range of 500 mm before and after the weld of the present invention, the flatness deviation of the top running surface is controlled within 0.1 - 0.3 mm / m, and the flatness deviation of the side guiding surface is controlled within -0.2 - 0.1 mm / m, reducing the bumps generated by the friction between the train wheels and the contact surface of the welded high manganese steel frog.

[0021] 3. The operation of the present invention is simple, the accuracy is reliable and guaranteed, it does not affect the electrode and platform structure of the original equipment, and it is suitable for popularization.

[0022] 4. The steel platform of the present invention serves as the main support structure of the welding platform, having high strength and rigidity. The copper electrode has excellent electrical conductivity, corrosion resistance and high temperature resistance, ensuring the welding stability and reliability; the left-right symmetric design of the fixed end and the movable end results in uniform stress, avoiding welding defects, realizing uniform heating and cooling of the welding joint, and improving the welding quality.

[0023] 5. The positioning device of the present invention can ensure precise alignment before welding, reduce welding errors, improve the welding quality and reliability; both the steel platform and the copper electrode are made of high-quality materials, having good durability and corrosion resistance, extending the service life of the welding platform, and reducing the maintenance and replacement costs.

[0024] 6. The protruding electrode of the present invention is suspended, reducing the direct thermal influence of the electrode on the frog end, reducing the width and depth of the heat affected zone, maintaining the material properties and mechanical strength of the frog end, and reducing the embrittlement or strength reduction of the material caused by the thermal influence; the suspended setting ensures that the weld is closely fitted to the joint surfaces of the frog and the rail, improving the welding quality and reliability, reducing defects, realizing rapid heating and cooling of the weld, and shortening the welding cycle; the suspended setting reduces the direct contact between the electrode and the frog end, reducing the electrode wear rate, extending the electrode life, reducing the electrode replacement frequency and cost; the suspended electrode is easy to adjust and calibrate, adapting to different working environments and task requirements, improving the work efficiency and quality; the suspended setting reduces the direct contact area between the electrode and the frog end, reducing the safety hazards caused by improper operation or equipment failure, protecting the safety of the operator, and reducing the occurrence of work-related injuries.

[0025] 7. The right-angle plate of the high manganese steel frog positioning device of the present invention ensures the precise positioning of the high manganese steel frog before welding; the positioning device has a simple structure and is easy to operate. Through simple adjustment and calibration, the precise positioning of the high manganese steel frog and the copper electrode can be achieved, improving work efficiency; the precise positioning and fitting ensure the quality and reliability of the welded joint, reduce the occurrence of welding defects, and make the welding process faster and more efficient.

[0026] 8. The slope of the inclined surface formed by the copper electrode inclined plate and the steel inclined plate of the rail positioning device of the present invention matches the slope of the rail, ensuring the precise positioning of the rail on the welding platform, reducing errors caused by mismatched slopes, improving the quality and reliability of the joint, and reducing welding defects; the copper electrode inclined plate of the electrode corresponds to and cooperates with the copper electrode, and the steel inclined plate corresponds to and cooperates with the steel platform. This material matching optimizes the transmission of current and heat, improves welding efficiency, and the copper helps to achieve rapid heating and cooling of the weld seam. The cooperation between the steel inclined plate and the steel platform ensures the stability and durability of the structure; the straight reference base edge provides a clear visual reference for the operator, facilitating calibration and adjustment before welding, helping to improve the alignment accuracy of the welded joint, and further reducing welding errors; the convex platform enhances the connection stability between the steel inclined plate and the steel platform, preventing displacement or deformation caused by uneven stress during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a high manganese steel frog with inclined rails;

[0028] Figure 2 It is an enlarged tangent diagram of the angle formed between the driving tread surface with inclined rails and the Y-axis of the rail;

[0029] Figure 3(a) is Figure 1 The front view of the high manganese steel frog with an inclined left end;

[0030] Figure 3(b) is the A-A cross-sectional view of Figure 3(a);

[0031] Figure 3(c) is Figure 1 The front view of the high manganese steel frog with an inclined right end;

[0032] Figure 3(d) is the A-A cross-sectional view of Figure 3(c);

[0033] Figure 4 It is a partially enlarged detailed diagram of the high manganese steel frog with inclined rails;

[0034] Figure 5 It is a schematic structural diagram of the welding platform of the flash welding machine;

[0035] Figure 6 It is a schematic structural diagram of the rail positioning device;

[0036] Figure 7Schematic diagram of the structure of the high manganese steel frog positioning device;

[0037] Figure 8 Use state diagram of the high manganese steel frog positioning device;

[0038] In the figure: 1 - High manganese steel frog, 2 - Rail, 3 - Driving tread, 4 - Y-axis of the rail, 5 - Top driving surface, 6 - Side guiding surface, 7 - Fixed end, 8 - Movable end, 9 - Steel platform, 10 - Copper electrode, 11 - Copper electrode copper inclined plate, 12 - Steel inclined plate, 13 - Aligned reference edge, 14 - Boss, 15 - Inclined surface, 16 - Aligned surface of the welding end of the high manganese steel frog, 17 - Aligned surface of the side of the electrode at the movable end. Specific implementation method

[0039] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying Figures 4 - 8 , Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0040] A flash welding device for a high manganese steel frog with inclined rails, (as shown in Figure 5 , Figure 6 , Figure 7 ) The device consists of a flash welding machine welding platform, a high manganese steel frog positioning device, and a rail positioning device. The fixed end 7 of the flash welding machine welding platform positions and places the high manganese steel frog 1 through the high manganese steel frog positioning device; the movable end 8 of the flash welding machine welding platform positions and places the rail 2 through the rail positioning device; the high manganese steel frog 1 is flash welded to the rail 2 according to the requirements of the flash welding process.

[0041] It should be noted that: The high manganese steel frog positioning device and the rail positioning device can ensure the precise alignment of the frog and the rail before welding, reducing welding defects caused by alignment errors. The precise alignment also helps to achieve a uniform distribution of the weld seam and improve the overall strength of the welded joint. The flash welding process itself has the characteristics of high weld quality and good joint strength. In this device, by optimizing the welding parameters and process conditions, the quality of the weld seam can be further ensured to meet the requirements of the railway operation for the connection strength between the frog and the rail. This device realizes the rapid positioning, clamping and welding of the frog and the rail through mechanization and automation, greatly improving the welding efficiency, reducing the time and labor costs of manual operation, and shortening the maintenance cycle. The flash welding process has the characteristic of fast welding speed and can complete the welding of the frog and the rail in a short time, which helps the railway department to quickly resume the line operation and reduce the operation interruption time caused by maintenance. This device is applicable to the welding of high manganese steel frogs and rails of different materials, such as high carbon steel rails, etc. By adjusting the welding parameters and process conditions, it can adapt to the welding requirements of frogs and rails of different materials and specifications. This device can carry out welding operations in a variety of environments, including indoor, outdoor, cold, high temperature and other harsh conditions, which helps the railway department to carry out the maintenance and replacement of frogs and rails under different climatic and geographical conditions. The design of this device is simple and clear, and the operator is easy to get started. Through simple training and guidance, the operator can master the use method and precautions of the device.

[0042] In the above embodiments, further: (as Figure 5 shown) The welding platform of the flash welding machine includes a fixed end 7 and a movable end 8; the fixed end 7 and the movable end 8 are respectively composed of symmetric steel platforms 9 and copper electrodes 10 on the left and right; the fixed end 7 is used to place the high manganese steel frog 1, and the movable end 8 is used to place the rail 2.

[0043] It should be noted that: The steel platform 9, as the main supporting structure of the welding platform, has high strength and good rigidity, and can withstand various forces and thermal effects generated during the welding process. The copper electrode 10 is used to transmit the welding current, has excellent electrical conductivity, and is corrosion-resistant and high-temperature resistant, ensuring the stability and reliability of the welding process. The left-right symmetrical design of the fixed end 7 and the movable end 8 enables the workpiece (high manganese steel frog 1 and rail 2) to be evenly stressed during the welding process, avoiding welding defects caused by uneven stress. The symmetrical design also helps to achieve uniform heating and cooling of the welded joint, thereby improving the welding quality. The positioning devices on the fixed end 7 and the movable end 8 can ensure the precise alignment of the high manganese steel frog 1 and the rail 2 before welding, helping to reduce errors during the welding process and improve the quality and reliability of the welded joint. The combination of the steel platform 9 and the copper electrode 10 can meet the welding requirements of frogs and rails with different materials and specifications. Especially for high manganese steel frogs with high hardness and high wear resistance, this welding platform can provide good welding effects. Both the steel platform 9 and the copper electrode 10 are made of high-quality materials, have good durability and corrosion resistance, help to extend the service life of the welding platform, and reduce maintenance and replacement costs.

[0044] In the above embodiment, preferably: The protruding electrode of the high manganese steel frog 1 in the length range of 50 to 80 mm at the end is suspended.

[0045] It should be noted that: The protruding electrode is suspended, which can reduce the direct thermal influence of the electrode on the end of the frog during the welding process, thereby reducing the width and depth of the heat-affected zone, helping to maintain the material properties and mechanical strength of the frog end, and reducing material embrittlement or strength reduction caused by thermal influence. The suspended setting enables the electrode to more precisely control the position and shape of the weld seam, ensuring that the weld seam closely fits the joint surfaces of the frog and the rail, helping to improve the quality and reliability of the welded joint and reducing the occurrence of welding defects. The protruding electrode suspended setting helps to achieve rapid heating and cooling of the weld seam, shortening the welding cycle, which is particularly important in railway maintenance and track replacement work, as it can quickly restore track operation and reduce the operation interruption time. The suspended setting reduces the direct contact between the electrode and the frog end, thereby reducing the wear rate of the electrode, helping to extend the service life of the electrode, and reducing the frequency and cost of replacing the electrode. The protruding electrode suspended setting enables the welding platform to adapt to high manganese steel frogs of different specifications and sizes, improving the versatility and flexibility of the welding platform, so that the same equipment can be used for welding multiple types of frogs. The suspended electrode is easier to adjust and calibrate to ensure precise alignment and stable operation during the welding process, helping the operator to quickly adapt to different working environments and task requirements, and improving work efficiency and quality. The protruding electrode suspended setting reduces the direct contact area between the electrode and the frog end, thereby reducing the safety hazards caused by improper operation or equipment failure, helping to protect the safety of the operator, and reducing the occurrence of work-related injuries.

[0046] In the above embodiments, further: (as Figure 7 , Figure 8 shown) The high manganese steel frog positioning device has a right-angle plate with an L-shaped structure; the outer vertical end face of the right-angle plate is the welding end alignment surface 16 of the high manganese steel frog, and the welding end alignment surface 16 of the high manganese steel frog is used to fit the welding end face of the high manganese steel frog 1 placed against the fixed end 7 of the flash welding machine welding platform; a vertically arranged movable end electrode positioning plate is perpendicularly made on the lower end face of the horizontal plate body of the right-angle plate, and the outer vertical end face of the movable end electrode positioning plate is the movable end electrode side alignment surface 17, and the movable end electrode side alignment surface 17 is used to position and fit the outer vertical end face of the copper electrode 10 of the movable end 8 of the flash welding machine welding platform.

[0047] It should be noted that: The outer vertical end face of the right-angle plate serves as the alignment surface for the welding end of the high manganese steel frog, which can ensure the precise positioning of the high manganese steel frog before welding. The lower end face of the horizontal plate body of the right-angle plate is vertically provided with a movable end electrode positioning plate, and its outer vertical end face serves as the alignment surface for the side of the movable end electrode. This alignment surface is used to position and fit the outer vertical end face of the copper electrode at the movable end of the flash welding platform of the flash welding machine, ensuring the stability and accuracy of the copper electrode during the welding process. The design of the positioning device is simple and clear, and it is easy for operators to get started. Through simple adjustment and calibration, the precise positioning of the high manganese steel frog and the copper electrode can be achieved, improving work efficiency. Precise positioning and fitting ensure the quality and reliability of the welded joint and reduce the occurrence of welding defects. The use of the positioning device makes the welding process faster and more efficient.

[0048] In the above embodiment, further: (as Figure 6 shown) The rail positioning device has an integrally connected electrode copper inclined plate 11 and a steel inclined plate 12; the slope of the inclined surface 15 formed by the electrode copper inclined plate 11 and the steel inclined plate 12 matches the slope of the rail 2; the electrode copper inclined plate 11 corresponds to and cooperates with the copper electrode 10, and the steel inclined plate 12 corresponds to and cooperates with the steel platform 9; both the outer sides of the electrode copper inclined plate 11 and the steel inclined plate 12 are provided with upwardly protruding straight reference datum edges 13; the bottom of the steel inclined plate 12 is provided with a boss 14 that engages with the steel platform 9.

[0049] It should be noted that: The slope of the inclined surface 15 formed by the electrode copper inclined plate 11 and the steel inclined plate 12 matches the slope of the rail 2. This design ensures the precise positioning of the rail on the welding platform and reduces the errors caused by non-matching slopes. Precise positioning helps to improve the quality and reliability of the welded joint and reduces the occurrence of welding defects. The electrode copper inclined plate 11 corresponds to and cooperates with the copper electrode 10, and the steel inclined plate 12 corresponds to and cooperates with the steel platform 9. This material matching optimizes the transmission of current and heat, improving the welding efficiency. Copper has good electrical conductivity and thermal conductivity, which helps to achieve rapid heating and cooling of the weld seam. The cooperation between the steel inclined plate and the steel platform ensures the stability and durability of the structure. Both the outer sides of the electrode copper inclined plate 11 and the steel inclined plate 12 are provided with upwardly protruding straight reference datum edges 13. These datum edges provide clear visual references for operators, facilitating calibration and adjustment before welding. The setting of the straight reference datum edges 13 helps to improve the alignment accuracy of the welded joint and further reduces welding errors. The bottom of the steel inclined plate 12 is provided with a boss 14 that engages with the steel platform 9. This design enhances the connection stability between the steel inclined plate and the steel platform, preventing displacement or deformation caused by uneven stress during welding.

[0050] The present invention also claims protection for a flash welding method for a rail-inclined high manganese steel frog, using any one of the above-mentioned devices and performing flash welding according to the requirements of the flash welding process, including the following steps:

[0051] Step 1. Position the high manganese steel frog by the high manganese steel frog positioning device: (as shown in Figure 7 , Figure 8 ) Place the high manganese steel frog 1 on the fixed end 7 of the flash welding machine welding platform, place the high manganese steel frog positioning device on the movable end 8 of the flash welding machine welding platform, and make the mating surface 16 of the high manganese steel frog welding end of the high manganese steel frog positioning device fit the welding end face of the high manganese steel frog 1. At the same time, make the mating surface 17 of the side of the movable end electrode of the high manganese steel frog positioning device fit the outer vertical end face of the copper electrode 10 of the movable end 8 of the flash welding machine welding platform. After positioning the high manganese steel frog 1, remove the high manganese steel frog positioning device.

[0052] Step 2. Position the rail positioning device: (as shown in Figure 5 , Figure 6 ) Place the rail positioning device on the movable end 8 of the flash welding machine welding platform, and make the bottom boss 14 of the rail positioning device engage with the steel platform 9 of the movable end 8. At the same time, make the copper electrode inclined plate 11 of the rail positioning device correspond to and be positioned with the copper electrode 10 of the movable end 8, and make the steel inclined plate 12 of the rail positioning device correspond to and be positioned with the steel platform 9 of the movable end 8.

[0053] Step 3. Position the rail: Place the rail 2 on the rail positioning device, and move the rail 2 to align and position the end of the rail 2 with the end of the high manganese steel frog 1.

[0054] Step 4. Flash welding: Perform flash welding according to the requirements of the flash welding process.

[0055] (as shown in Figure 4 ) In the above technical solution, preferably: in the range of 500 mm before and after the weld, the flatness deviation of the top running surface 5 is controlled within 0.1 - 0.3 mm / m, and the flatness deviation of the side guiding surface 6 is controlled within -0.2 - 0.1 mm / m.

[0056] It can be found from the above description that: the present invention realizes the high-precision flash welding of the inclined high manganese steel frog of the rail, meeting the requirements of the flash welding process for the inclined high manganese steel frog of the rail.

[0057] In the present invention, in the range of 500 mm before and after the weld, the flatness deviation of the top running surface is controlled within 0.1 - 0.3 mm / m, and the flatness deviation of the side guiding surface is controlled within -0.2 - 0.1 mm / m, reducing the bumps generated by the friction between the train wheels and the contact surface of the welded high manganese steel frog.

[0058] The operation of the present invention is simple, the precision is reliable and guaranteed, and it does not affect the electrode and platform structure of the original equipment, being suitable for popularization.

[0059] It should be understood that although this specification is described according to one embodiment, this embodiment does not only include an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and 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. A flash welding device for inclined rail high manganese steel frog, characterized in that: The device comprises a flash welder welding platform, a high manganese steel frog positioning device, and a rail positioning device; the fixed end (7) of the flash welder welding platform is positioned and placed on a high manganese steel frog (1) through the high manganese steel frog positioning device; the movable end (8) of the flash welder welding platform is positioned and placed on a rail (2) through the rail positioning device; the high manganese steel frog (1) is aligned with the rail (2) for flash welding according to flash welding process requirements.

2. The device according to claim 1, characterized in that: The flash welder welding platform comprises a fixed end (7) and a movable end (8); the fixed end (7) and the movable end (8) are respectively composed of a bilaterally symmetrical steel platform (9) and a copper electrode (10); the fixed end (7) is used to place a high manganese steel frog (1), and the movable end (8) is used to place a steel rail (2).

3. The device according to claim 2, characterized in that: The protruding electrode with a length of 50 to 80 mm at the end of the high manganese steel frog (1) is suspended.

4. The device according to claim 1 or 2, characterized in that: The high manganese steel frog positioning device comprises a right-angle plate of an L-shaped structure; the outer vertical end face of the right-angle plate is a high manganese steel frog welding end abutment surface (16), and the high manganese steel frog welding end abutment surface (16) is used to fit the welding end face of the high manganese steel frog (1) placed on the fixed end (7) of the flash welder welding platform; a vertically arranged movable end electrode positioning plate is vertically formed on the lower end face of the horizontal plate body of the right-angle plate, and the outer vertical end face of the movable end electrode positioning plate is a movable end electrode side abutment surface (17), and the movable end electrode side abutment surface (17) is used to position and fit the outer vertical end face of the copper electrode (10) of the movable end (8) of the flash welder welding platform.

5. The device according to claim 1 or 2, characterized in that: The rail positioning device comprises an electrode copper inclined plate (11) and a steel inclined plate (12) which are connected as one body; the inclination of the inclined surface (15) formed by the electrode copper inclined plate (11) and the steel inclined plate (12) matches the inclination of the rail (2); the electrode copper inclined plate (11) and the copper electrode (10) are matched with each other, and the steel inclined plate (12) and the steel platform (9) are matched with each other; the outer sides of the electrode copper inclined plate (11) and the steel inclined plate (12) are both provided with an upwardly protruding straight reference datum edge (13); and the bottom of the steel inclined plate (12) is provided with a boss (14) which is engaged with the steel platform (9).

6. A flash welding method for inclined high manganese steel frogs of rails, characterized in that: Using the device as claimed in any one of claims 1 to 5, flash welding is performed according to the flash welding process requirements, including the following steps: Step 1, positioning the high manganese steel frog using a high manganese steel frog positioning device: placing the high manganese steel frog (1) on the fixed end (7) of the flash welder welding platform, placing the high manganese steel frog positioning device on the movable end (8) of the flash welder welding platform, and making the high manganese steel frog welding end of the high manganese steel frog positioning device close to the surface (16) and abutting the welding end surface of the high manganese steel frog (1), while making the side surface of the movable end electrode of the high manganese steel frog positioning device close to the surface (17) and abutting the outer vertical end surface of the copper electrode (10) of the movable end (8) of the flash welder welding platform, after the high manganese steel frog (1) is positioned, remove the high manganese steel frog positioning device; Step 2, positioning the rail positioning device: placing the rail positioning device on the movable end (8) of the welding platform of the flash welder, and making the bottom boss (14) of the rail positioning device engage with the steel platform (9) of the movable end (8), and at the same time making the electrode copper inclined plate (11) of the rail positioning device and the copper electrode (10) of the movable end (8) correspondingly positioned, and the steel inclined plate (12) of the rail positioning device and the steel platform (9) of the movable end (8) correspondingly positioned; Step 3, positioning the rail: placing the rail (2) on the rail positioning device, and moving the rail (2) so that the end of the rail (2) is aligned with the end of the high manganese steel frog (1) and positioned; Step 4: Flash welding: Perform flash welding according to the flash welding process requirements.

7. The method according to claim 6, characterized in that: In the range of 500 mm before and after the weld, the straightness deviation of the top running surface (5) is controlled within 0.1 to 0.3 mm / m, and the straightness deviation of the side guide surface (6) is controlled within -0.2 to 0.1 mm / m.

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