Production method of elastic bendable switch rail for compound dividing turnout and switch rail assembly of elastic bendable switch rail

Abstract

The invention relates to the technical field of switch rails, in particular to a production method of an elastic bendable switch rail for a compound dividing turnout, which comprises the following steps: determining the steel rail model of the switch rail according to the model of a stock rail; determining the machining range of the switch rail according to the steel rail model; precise cutting is conducted on the determined machining range through slicing machining, the horizontal inertia moment and the flexural rigidity of the switch rail are weakened, and an elastic bendable section is formed; the cut switch rail is subjected to precision verification; forging and pressing the point rail subjected to precision verification, and processing the section of the point rail into a common steel rail section consistent with that of the stock rail; the forged and pressed switch rail is cooled, straightened and detected, the switch rail produced through the method is stable and simple in structure, the problems that bolts are broken off, rail seams are eroded and the like are reduced, the reliability of the switch rail is improved, the service life of the switch rail is prolonged, and maintenance convenience of the switch rail is improved.

Description

Technical Field

[0001] This invention relates to the field of switch rail technology, specifically providing a method for producing flexible bendable switch rails for compound turnouts and switch rail components thereof. Background Technology

[0002] In the railway transportation sector, the double-switching turnout is a key piece of equipment for realizing train track switching. The performance of the switch rail components at the double switch has a significant impact on the safety, stability and reliability of turnout switching. The traditional double-switching turnout double switch adopts a live joint type switch rail structure, which relies on the assembly of multiple components to realize the elastic deformation and connection function of the switch rail. From the perspective of structural stability, the live joint is loosely connected by multiple components, and there are gaps and friction between the components. The dynamic load impact when the train passes can easily cause wear of the components and loosening of the bolts, causing lateral displacement and creep of the switch rail, resulting in turnout switching jamming, and even failures such as bolt breakage and displacement of spacer, threatening train operation safety. At the same time, the live joint has a complex structure and many parts, which increases the difficulty of manufacturing, installation and maintenance. The accumulation of dimensional tolerances between components can easily cause insufficient fitting accuracy between the switch rail and the stock rail, aggravating wheel-rail impact and accelerating the deterioration of track components. Furthermore, in terms of controlling the elastic deformation of the switch rail, traditional structures do not precisely design and process the elastic bendable section of the switch rail. When the switch rail is turned, the elastic deformation is dispersed and uncontrollable, which can easily cause the turning force to exceed the rated load of the electric switch machine, affecting the service life of the switch machine and the reliability of turnout switching. Moreover, the lack of strict control over the processing precision of the switch rail means that defects such as burrs and cracks can easily cause stress concentration, reduce the fatigue life of the switch rail, and increase maintenance costs.

[0003] Accordingly, there is a need in the field for a new method for producing flexible bendable switch rails for compound turnouts and its switch rail assembly to solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem of poor stability of existing elastic switch rails.

[0005] In a first aspect, the present invention provides a method for producing flexible bendable switch rails for compound turnouts, characterized in that the production method includes the following steps: S1: Determine the rail type of the switch rail based on the type of the base rail; S2: Determine the processing range of the switch rails based on the rail type; S3: The defined machining range is precisely cut by planing to weaken the horizontal moment of inertia and bending stiffness of the switch rail, forming an elastic bendable section; S4: Perform accuracy verification on the cut switch rail; S5: After the precision verification, the switch rail is forged and pressed to make its cross-section the same as that of the basic rail. S6: Cool, straighten and inspect the forged switch rails.

[0006] Based on the above setup, step S1, model matching, ensures that the switch rail and the base rail are compatible in terms of material and performance, avoiding stress concentration in subsequent connections caused by mismatched base rail models. Step S2 clarifies the processing range, laying the foundation for controllable deformation of the flexible bendable section and solving the problem of unstable operation caused by the uncertain deformation area of ​​traditional switch rails. Step S3, precise planing, weakens the moment of inertia and stiffness in specific areas, concentrating the elastic deformation of the switch rail in the designed flexible bendable section, replacing the loose mode of deformation achieved by the joint relying on the gaps between multiple components, and reducing the risk of jamming caused by friction and wear between components. Step S4, precision verification, strictly controls dimensional deviations and surface quality, avoiding local stress concentration caused by processing defects and reducing the probability of crack initiation. Step S5, forging, processes the heel end of the switch rail to have a cross-section consistent with the base rail, eliminating defects such as bolt damage and rail expansion caused by excessively large / small gaps in the joint structure. Step S6, cooling, straightening, and inspection, further ensures the overall dimensional accuracy and structural stability of the switch rail, avoiding the impact of deformation after hot working on performance.

[0007] In summary, compared with the loose structure of traditional joints that rely on the assembly of multiple parts, the switch rail produced by this method has a stable structure and simple construction, reduces problems such as bolt breakage and rail gap corrosion, and improves the reliability, service life and maintenance convenience of the switch rail.

[0008] In the preferred technical scheme of the above-mentioned method for producing flexible bendable switch rails for double-section turnouts, "determining the rail type of the switch rail according to the type of the base rail" includes, When the basic rail type is 60kg / m, 60AT1 or 60AT2 rails are selected; when the basic rail type is 50kg / m, 50AT1 rails are selected.

[0009] Based on the above settings, by clearly defining the model correspondence between the base rail and the switch rail, the compatibility of the two in terms of material and cross-sectional characteristics is ensured. This avoids large differences in height and cross-sectional area between the two rail components due to model mismatch, providing a stable foundation for subsequent processing steps such as planing and forging, ensuring the stability of the coordinated operation of the switch rail and the base rail, and providing space and basis for their elastic clamping. The mutually matched rail types also ensure a relatively reasonable conversion force during the switch rail switching process.

[0010] In the preferred technical solution of the above-mentioned method for producing flexible bendable switch rails for compound turnouts, "determining the processing range of the switch rails according to the rail type" includes, An elastic bendable section is defined at the front end of the switch rail. The length of the elastic bendable section is 1200mm, and the processing range needs to cover the bottom and web of the switch rail.

[0011] Based on the above settings, a 1200mm long flexible bendable section is designated, and the processing range is clearly defined to cover the rail base and rail web, making the elastic deformation area of ​​the switch rail controllable. This avoids the problem of excessive switching force exceeding the rated load of the electric switch machine due to an excessively short switch rail, and ensures that elastic deformation is concentrated in the designed flexible bendable section by limiting the processing range, reducing unexpected deformation or stress concentration in non-designed areas, and improving the smoothness of switch rail operation and the safety of turnout switching.

[0012] In the preferred technical solution of the above-mentioned method for producing flexible bendable switch rails for compound turnouts, "precise cutting of a defined processing range by planing" includes... The planing parameters should be set according to the type of switch rail described above: For 50-9 straight point rails, the planing parameters T1 on both sides of the rail base are 0mm and T2 is 35mm, and the planing parameter W on the rail web is 7.5mm. For a 50-9 curved point rail, the planing parameters T1 on both sides of the rail bottom are 5mm and T2 are 30mm, and the planing parameter W on the rail web is 7.5mm.

[0013] Based on the above setup, a planing process is used to precisely cut the rail base or web, specifically weakening the horizontal moment of inertia and bending stiffness of the switch rail to create a controllable, elastic, and bendable section. Compared to the traditional joint design that relies on the gaps between multiple components to achieve deformation, this design achieves deformation through the flexibility of the structure itself, reducing friction and fit errors between components, lowering the risk of switching jams, making the deformation process more stable and predictable, and improving the reliability of turnout switching.

[0014] In the preferred technical solution of the above-mentioned method for producing flexible bendable switch rails for compound turnouts, "precision verification of the cut switch rails" includes... After machining, the cutting dimension deviation of the switch rail is inspected to ensure that the deviation is less than or equal to 0.5mm, and the flatness of the machined surface is checked to avoid defects such as burrs and cracks from affecting the elastic deformation performance.

[0015] Based on the above settings, by detecting cutting dimension deviations and machined surface flatness, defects such as burrs and cracks are avoided, ensuring the structural integrity and performance stability of the elastic bendable section. Dimensional accuracy control ensures consistent elastic deformation and prevents local stress concentration; surface quality control reduces stress corrosion or fatigue crack initiation points, extends the service life of the switch rail, and reduces maintenance frequency.

[0016] In the preferred technical scheme of the above-mentioned method for producing flexible bendable switch rails for compound turnouts, "forging the switch rails after accuracy verification and machining their cross-section to be the same as that of ordinary steel rails" includes... Determine the length of the switch rail heel end that needs to be forged, as well as the cross-sectional transition section before and after forging; The rail heel end is softened by heating, and its cross-section is machined using a die forging process to be the same as that of a standard rail. When using 60AT1 or 60AT2 rails, the heel end forging pressure is 60kg / m of rail cross section. When using 50AT1 steel rails, the heel end forging pressure is 50kg / m of rail cross section.

[0017] Based on the above setup, the tip of the switch rail is processed into a cross-section consistent with the base rail by heating and softening and die forging, achieving a rigid fit connection with the subsequent guide rail or base rail. Compared with the loose connection of multiple parts in traditional live joints, this structure reduces bolt damage, rail expansion and other defects caused by excessive or insufficient gaps, simplifies the connection structure, reduces the risk of conversion jamming caused by component wear or improper bolt tightening, and improves the stability and maintenance convenience of the joint.

[0018] Secondly, the present invention provides a switch rail assembly manufactured by performing the methods described in steps S1 to S6 above, the switch rail assembly comprising, The switch rail body has an elastic bendable section at the front end of the heel end, so that the main elastic deformation when the switch rail is moved is concentrated in the elastic bendable section. A transition structure is provided at the end of the elastically bendable section; A connector structure is installed at the transition structure for fixed connection with other guide rails. The fastener is provided in multiple sets and is arranged along the length of the flexible bendable section for pressing and fixing the flexible bendable section.

[0019] Based on the above configuration, the switch rail assembly integrates a flexible bendable section, transition structure, joint structure, and fastening plate, forming a compact, integrated structure suitable for double-switching turnouts. Compared to the existing live joint structure used in double-switching turnout switch rails, this assembly has a simpler construction and a significantly reduced number of parts, structurally avoiding the problems of bolt breakage and switching jamming caused by the numerous components and rapid wear of live joints. Simultaneously, the flexible bendable section in the assembly achieves controllable deformation through its own structure, replacing the live joint's reliance on component gap deformation, reducing the risk of failure caused by wear or improper tightening. Furthermore, addressing the issue of limited maintenance space in double-switching turnouts, this integrated assembly reduces the complex structure of continuous live joints between the switch rail and frog rail, lowering maintenance difficulty and significantly improving the operational stability and maintenance convenience of the double-switching turnout.

[0020] In the preferred embodiment of the above-mentioned switch rail assembly, the fastening plate includes a gauge block and a support fastening plate. The side of the gauge block that contacts the switch rail is configured with a 7-type structure so that the bottom of the switch rail is fastened and fixed by the horizontal and vertical surfaces of the 7-type structure. The support fastening plate is pressed onto the top of the gauge block, and the support fastening plate is fixed to the base by bolts.

[0021] Based on the above configuration, the self-limiting gauge block type support plate uses a type 7 gauge block to fasten the bottom of the switch rail, and is fixed to the base bolts in conjunction with the support plate, thus achieving reliable constraint on the heel end of the switch rail. Compared with the loose structure of traditional joints that rely on inner and outer rail braces, this design can not only limit lateral displacement and creep, but also adjust the gauge through the gauge block, improving the stability of the fixation and the convenience of maintenance, and reducing positional deviations or conversion failures caused by fixation failure.

[0022] In the preferred embodiment of the above-mentioned switch rail assembly, the joint structure is configured as a four-hole clamp.

[0023] Based on the above configuration, the joint structure is set as a four-hole clamp plate, replacing the traditional five-hole spacer and complex multi-bolt connection of the live joint. The four-hole clamp plate connection is simpler and more rigid, reducing the number of bolts and the mating clearance, thus reducing the risk of bolt breakage; the overall connection is better, reducing loosening problems caused by component wear, improving joint stability, and facilitating daily inspection and maintenance.

[0024] In the preferred embodiment of the above-mentioned switch rail assembly, the length of the flexible bendable section is 1200mm.

[0025] Based on the above settings, the length of the flexible bendable section is determined to be 1200mm, providing sufficient flexibility for deformation in conjunction with the characteristics of AT rails. This avoids excessive force due to excessive length and insufficient rigidity or strength issues due to excessive length, ensuring that the elastic deformation of the switch rail is fully controllable during operation, guaranteeing that the load on the electric switch machine is within the rated range, and improving the safety and stability of turnout switching. Attached Figure Description

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 A process flow diagram of the present invention is shown; Figure 2 A schematic diagram of the overall structure of the present invention is shown; Figure 3 A schematic diagram of the connection structure of the present invention is shown; Figure 4 A schematic diagram of the buckle fastener structure of the present invention is shown; Figure 5 A schematic diagram of the slicing parameters of the present invention is shown.

[0027] Figure label: 1. Flexible bendable section; 2. Transition section; 3. Buckle fastener; 4. Joint structure; 5. Basic rail; 6. Track gauge block; 7. Support buckle plate. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0029] It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the structure must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] This invention provides a method for producing flexible bendable switch rails for compound crossover turnouts, characterized in that the production method includes the following steps: S1: Determine the rail type of the switch rail based on the type of basic rail 5; S2: Determine the processing range of the switch rails based on the rail type; S3: The planing process is used to precisely cut the defined processing range, weakening the horizontal moment of inertia and bending stiffness of the switch rail, forming an elastic bendable section 1; S4: Perform accuracy verification on the cut switch rail; S5: The precision-checked switch rail is forged and pressed to make its cross-section the same as that of the basic rail 5. S6: Cool, straighten and inspect the forged switch rails.

[0032] Step S1, model matching, ensures that the switch rail and the base rail 5 are compatible in terms of material and performance, avoiding stress concentration in subsequent connections caused by mismatched base models. Step S2 clarifies the processing range, laying the foundation for controllable deformation of the flexible bendable section 1 and solving the problem of unstable operation caused by the uncertain deformation area of ​​traditional switch rails. Step S3, precise planing, weakens the moment of inertia and stiffness in specific areas, concentrating the elastic deformation of the switch rail in the designed flexible bendable section 1, replacing the loose mode of deformation achieved by the joint relying on the gaps between multiple components, and reducing the risk of jamming caused by friction and wear between components. Step S4, precision verification, strictly controls dimensional deviations and surface quality, avoiding local stress concentration caused by processing defects and reducing the probability of crack initiation. Step S5, forging, processes the heel end of the switch rail to have the same cross-section as the base rail 5, eliminating bolt damage, rail bulging, and other defects caused by excessively large / small gaps in the joint structure 4. Step S6, cooling, straightening, and inspection, further ensures the overall dimensional accuracy and structural stability of the switch rail, avoiding the impact of deformation after hot working on performance.

[0033] In summary, compared with the loose structure of traditional joints that rely on the assembly of multiple parts, the switch rail produced by this method has a stable structure and simple construction, reduces problems such as bolt breakage and rail gap corrosion, and improves the reliability, service life and maintenance convenience of the switch rail.

[0034] Furthermore, in step S1, when the model of the base rail 5 is 60kg / m, a 60AT1 or 60AT2 rail is selected; when the model of the base rail 5 is 50kg / m, a 50AT1 rail is selected. By clearly defining the model correspondence between the base rail 5 and the switch rail, the compatibility of the two in terms of material and cross-sectional characteristics is ensured. This avoids large differences in height and cross-sectional area between the two rail components due to model mismatch, providing a stable foundation for subsequent processing steps such as planing and forging, ensuring the stability of the coordinated work of the switch rail and the base rail 5, and also providing space and a basis for the elastic clamping of the two. The mutually matched rail types also ensure a relatively reasonable conversion force during the switch rail switching process. It should be noted that this invention does not impose any restrictions on the specific model of the rail; those skilled in the art can set it according to their needs, as long as the rail can perfectly adapt to the base rail 5.

[0035] Furthermore, in step S2, a flexible, bendable section 1 is defined at the front end of the switch rail. The length of the flexible, bendable section 1 is 1200mm, and the processing range must cover the rail base and rail web of the switch rail. Defining the 1200mm long flexible, bendable section 1 and clearly defining the processing range covering the rail base and rail web ensures that the elastic deformation area of ​​the switch rail is controllable. This avoids the problem of excessive switching force exceeding the rated load of the electric switch machine due to an excessively short switch rail, and ensures that the elastic deformation is concentrated in the designed flexible, bendable section 1 by limiting the processing range, reducing unexpected deformation or stress concentration in non-designed areas, and improving the smoothness of switch rail operation and the safety of turnout switching. It should be noted that the present invention does not impose any restrictions on the specific length of the flexible, bendable section 1. Those skilled in the art can set it according to their needs. For example, the length of the flexible, bendable section 1 can be 1100mm, or it can be 1300mm, as long as the flexible, bendable section 1 can adapt to the size of the switch rail.

[0036] Furthermore, in step S3, the planing parameters are set according to the type of switch rail: For 50-9 straight point rails, the planing parameters T1 on both sides of the rail base are 0mm and T2 is 35mm, and the planing parameter W on the rail web is 7.5mm. For the 50-9 curved switch rail, the planing parameters T1 on both sides of the rail base are 5mm and T2 are 30mm, while the planing parameter W on the rail web is 7.5mm. Precise planing is used to cut the rail base or rail web, specifically weakening the horizontal moment of inertia and bending stiffness of the switch rail, thus constructing a controllable, elastic, and bendable section 1. Compared to the traditional joint design that relies on the gaps between multiple components to achieve deformation, this design achieves deformation through the flexibility of the structure itself, reducing friction and fit errors between components, lowering the risk of switching jams, making the deformation process more stable and predictable, and improving the reliability of turnout switching. Of course, it should be noted that this invention does not impose any limitations on the planing parameters; those skilled in the art can set them according to their needs, such as... Figure 3 As shown: For example, for a 50-12 straight point rail, the planing parameters T1 on both sides of the rail bottom are 0mm and T2 are 35mm, and the planing parameter W on the rail web is 7.5mm. For example, for a 50-12 curved point rail, the planing parameters T1 on both sides of the rail bottom are 5mm and T2 are 30mm, and the planing parameter W on the rail web is 7.5mm. For example, for a 60-9 straight point rail, the planing parameters T1 on both sides of the rail bottom are 0mm and T2 are 20mm, and the planing parameter W on the rail web is 0mm. For example, for a 60-9 curved point rail, the planing parameters T1 and T2 on both sides of the rail bottom are 10mm and 10mm respectively, and the planing parameter W on the rail web is 0mm. For example, for a 60-12 straight point rail, the planing parameters T1 on both sides of the rail bottom are 0mm and T2 are 20mm, and the planing parameter W on the rail web is 0mm. For example, for a 60-12 curved point rail, the planing parameters T1 and T2 on both sides of the rail bottom are 10mm and 10mm respectively, and the planing parameter W on the rail web is 0mm. As long as the planing parameters can meet the requirements of the elastic bendable section 1, it is acceptable.

[0037] Furthermore, in step S4, the cutting dimensional deviation of the switch rail is inspected after machining to ensure that the deviation is less than or equal to 0.5 mm, and the flatness of the machined surface is checked to avoid defects such as burrs and cracks affecting the elastic deformation performance. By inspecting the cutting dimensional deviation and the flatness of the machined surface, defects such as burrs and cracks are avoided, ensuring the structural integrity and performance stability of the elastic bendable section 1. Dimensional accuracy control ensures the consistency of elastic deformation and prevents local stress concentration; surface quality control reduces stress corrosion or fatigue crack initiation points, extends the service life of the switch rail, and reduces maintenance frequency.

[0038] Further, in step S5, the length of the tip rail end to be forged and the section transition section 2 before and after forging are determined; The rail heel end is softened by heating, and its cross-section is machined using a die forging process to be the same as that of a standard rail (rail 5). When using 60AT1 or 60AT2 rails, the heel end forging pressure is 60kg / m of rail cross section. When using 50AT1 steel rails, the heel end forging pressure is 50kg / m of rail cross section.

[0039] By heating and softening followed by die forging, the heel end of the switch rail is machined to have a cross-section consistent with the base rail 5, achieving a rigid fit connection with subsequent guide rails or the base rail 5. Compared to the loose multi-part connection of traditional live joints, this structure reduces bolt damage and rail expansion caused by excessively large or small gaps, simplifies the connection structure, reduces the risk of conversion jamming due to component wear or improper bolt tightening, and improves joint stability and maintenance convenience. It should be noted that this invention does not impose any restrictions on the specific forging method; those skilled in the art can set it according to their needs. For example, the forging method can be die forging, or free forging, as long as the dimensions of the forged switch rail meet the requirements.

[0040] Secondly, the present invention provides a switch rail assembly manufactured by performing the methods described in steps S1 to S6 above. The switch rail assembly includes... The switch rail body has an elastic bendable section 1 at the front end of the heel end, so that the main elastic deformation when the switch rail is moved is concentrated in the elastic bendable section 1. A transition structure is provided at the end of the flexible bendable section 1; Connector structure 4 is installed at the transition structure and is used for fixed connection with other guide rails; The fastener 3, with multiple sets, is arranged along the length of the flexible bendable section 1 and is used to fasten and fix the flexible bendable section 1. The switch rail assembly, by integrating the flexible bendable section 1, transition structure, joint structure 4, and fastener 3, forms a compact, integrated structure suitable for the double-switching turnout. Compared to the existing live joint structure 4 used in the switch rails of double-switching turnouts, this assembly has a simpler construction and a significantly reduced number of parts, structurally avoiding the problems of bolt breakage and switching jamming caused by the numerous parts and rapid wear of live joints. Simultaneously, the flexible bendable section 1 in the assembly achieves controllable deformation through its own structure, replacing the live joint's reliance on component gap deformation, reducing the risk of failure caused by wear or improper tightening. Furthermore, addressing the issue of limited maintenance space in double-switching turnouts, this integrated assembly reduces the complex structure of continuous live joints between the switch rail and the frog rail, lowering maintenance difficulty and significantly improving the operational stability and maintenance convenience of the double-switching turnout.

[0041] Furthermore, it should be noted that this invention does not impose any restrictions on the fixing method of the switch rail. Those skilled in the art can set it according to their needs. For example, the fixing method can be bolt fixing, or it can be snap-fit ​​fixing, as long as the installation of the switch rail is secure. In this preferred embodiment, the fastener 3 includes a gauge block 6 and a support fastener 7. The side of the gauge block 6 that contacts the switch rail is set with a 7-shaped structure, so that the bottom of the switch rail is fixed by the horizontal and vertical surfaces of the 7-shaped structure. The support fastener 7 is pressed on the top of the gauge block 6, and the support fastener 7 is fixed to the base by bolts. The self-limiting gauge block 6 and the support fastener 7 fasten the bottom of the switch rail by the 7-shaped structure gauge block 6, and are fixed to the base by bolts, thus achieving reliable constraint on the heel end of the switch rail. Compared with the loose structure of traditional joints that rely on inner and outer rail supports, this design can not only limit lateral displacement and creep, but also adjust the gauge through the gauge block 6, improve the fixing stability and maintenance convenience, and reduce position deviation or conversion failure caused by fixing failure.

[0042] As a preferred embodiment, the joint structure 4 is configured as a four-hole clamp, replacing the traditional five-hole spacer and complex multi-bolt connection of a live joint. The four-hole clamp connection is simpler and more rigid, reducing the number of bolts and the mating clearance, thus lowering the risk of bolt breakage; overall connectivity is better, reducing loosening problems caused by component wear, improving joint stability, and facilitating daily inspection and maintenance. Furthermore, the length of the flexible bendable section 1 is 1200mm. The length of the flexible bendable section 1 is clearly defined as 1200mm. Combined with the characteristics of AT rails, it provides sufficient flexible deformation space, avoiding excessive force due to excessive length, and preventing insufficient rigidity or strength hazards due to excessive length. This ensures that the elastic deformation of the switch rail is fully controllable when it is turned, and guarantees that the load of the electric switch machine is within the rated range, thereby improving the safety and stability of turnout switching.

[0043] The technical solutions of the present invention have been described in conjunction with the optional embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for producing flexible bendable switch rails for compound crossover turnouts, characterized in that, The production method includes the following steps: S1: Determine the rail type of the switch rail based on the type of the base rail; S2: Determine the processing range of the switch rails based on the rail type; S3: The defined machining range is precisely cut by planing to weaken the horizontal moment of inertia and bending stiffness of the switch rail, forming an elastic bendable section; S4: Perform accuracy verification on the cut switch rail; S5: After the precision verification, the switch rail is forged and pressed to make its cross-section the same as that of the basic rail. S6: Cool, straighten and inspect the forged switch rails.

2. The method for producing flexible bendable switch rails for compound turnouts according to claim 1, characterized in that, "Determining the switch rail type based on the base rail type" includes, When the basic rail type is 60kg / m, 60AT1 or 60AT2 rails shall be selected; when the basic rail type is 50kg / m, 50AT1 rails shall be selected.

3. The method for producing flexible bendable switch rails for compound crossover turnouts according to claim 1, characterized in that, "Determining the processing range of the switch rails based on the rail type" includes, An elastic bendable section is defined at the front end of the switch rail. The length of the elastic bendable section is 1200mm, and the processing range needs to cover the bottom and web of the switch rail.

4. The method for producing flexible bendable switch rails for compound turnouts according to claim 1, characterized in that, "Precise cutting of a defined machining range using planing" includes... The planing parameters should be set according to the type of switch rail described above: For 50-9 straight point rails, the planing parameters T1 on both sides of the rail base are 0mm and T2 is 35mm, and the planing parameter W on the rail web is 7.5mm. For a 50-9 curved point rail, the planing parameters T1 on both sides of the rail bottom are 5mm and T2 are 30mm, and the planing parameter W on the rail web is 7.5mm.

5. The method for producing flexible bendable switch rails for compound crossover turnouts according to claim 1, characterized in that, "Accuracy verification of the cut switch rails" includes... After machining, the cutting dimension deviation of the switch rail is inspected to ensure that the deviation is less than or equal to 0.5mm, and the flatness of the machined surface is checked to avoid defects such as burrs and cracks from affecting the elastic deformation performance.

6. The method for producing flexible bendable switch rails for compound turnouts according to claim 1, characterized in that, "The precision-calibrated switch rails are forged and pressed to machine their cross-section to match that of ordinary steel rails" includes... Determine the length of the switch rail heel end that needs to be forged, as well as the cross-sectional transition section before and after forging; The rail heel end is softened by heating, and its cross-section is machined using a die forging process to be the same as that of a standard rail. When using 60AT1 or 60AT2 rails, the heel end forging is 60kg / m of rail cross section. When using 50AT1 steel rails, the heel end forging pressure is 50kg / m of rail cross section.

7. A switch rail assembly, manufactured by performing the methods described in steps S1 to S6 above, characterized in that, The switch rail assembly includes, The switch rail body has an elastic bendable section at the front end of the heel end, so that the main elastic deformation when the switch rail is moved is concentrated in the elastic bendable section. A transition structure is provided at the end of the elastically bendable section; A connector structure is installed at the transition structure for fixed connection with other guide rails. The fastener is provided in multiple sets and is arranged along the length of the flexible bendable section for pressing and fixing the flexible bendable section.

8. The switch rail assembly according to claim 7, characterized in that, The fastener includes a gauge block and a support plate. The side of the gauge block that contacts the switch rail is configured with a 7-shaped structure so that the bottom of the switch rail is fastened and fixed by the horizontal and vertical surfaces of the 7-shaped structure. The support plate is pressed onto the top of the gauge block and is fixed to the base by bolts.

9. The switch rail assembly according to claim 7, characterized in that, The connector structure is configured as a four-hole clamp.

10. The switch rail assembly according to claim 7, characterized in that, The length of the flexible bendable section is 1200mm.

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