Basic rail structure for an obtuse combination frog and its processing method

Abstract

Provided are a stock rail structure for an obtuse angle combination frog and a processing method thereof, including the stock rail structure for an obtuse angle combination frog; the stock rail of the stock rail structure is manufactured using a 60TY1 rail with an asymmetric cross-section; the side with a wider distance from the center line of the stock rail head of the stock rail structure is used as the working edge; the processing method of the stock rail structure is completed by a method of first rough machining, then top bending, and then finish machining; or completed by a processing method of first finish machining and then top bending. The present invention solves the technical problems that the structure of the current alloy steel obtuse angle combination frog is relatively complex, inconvenient to assemble, has limited wear resistance and strength, and a relatively short service life; the structure and method solutions are relatively simple, easy to process, manufacture and assemble, the structure is relatively more stable, safe, has good ride quality, and has a longer service life, meeting the needs of the railway market.

Description

Technical Field

[0001] The present invention specifically relates to a stock rail structure for an obtuse angle combined frog and a processing method thereof. Background Art

[0002] Compared with high manganese steel frogs, alloy steel combined frogs have a longer overall service life, and have gradually been recognized and used by railway departments in various countries, which has continuously promoted the development and progress of alloy steel combined frog technology. Among them, the obtuse angle alloy steel combined frog, as an essential device in a diamond crossover turnout, is subjected to alternating loads such as pressure, impact force, and vibration force during use, and its condition directly affects the train operation safety.

[0003] Under the existing technology: In the existing obtuse angle alloy steel combined frogs, the stock rails generally are made of 60 kg / m rails with a standard cross-section, which have problems such as complex manufacturing processes, difficult assembly, low production efficiency, and reduced strength after the stock rails are machined, and cannot well meet the market demand of turnouts.

[0004] Currently, Chinese patents with publication numbers: CN115012256A, CN204982560U, and CN204080550U all relate to a stock rail inlaid alloy steel combined obtuse angle frog, but the disadvantages are: the structure of the wing rail inlay block is complex, which further increases the difficulty of assembly and requires high manufacturing precision for each component. There is a splicing seam between the inlay block and the stock rail, and the smoothness of the working edge is poor.

[0005] Chinese patents with publication numbers: CN109162154A and CN111809454A all relate to an alloy steel combined obtuse angle frog, and a reinforcing rail is arranged on the outer side of the stock rail, and the disadvantages are: the manufacturing process is complex and the assembly is difficult.

[0006] The Chinese patent with publication number: CN202072990U relates to an alloy steel rail combined obtuse angle frog, in which the long point rail, the stock rail, and the guard rail are made of alloy steel rails and are connected by spacer plates, and the rail head in the middle of the guard rail is processed and heightened by forging. In this scheme, the long point rail is a rail and is located in the adverse clearance area, and the strength of the point rail is relatively weak.

[0007] The Chinese patent with the publication number CN214193953U relates to a new type of alloy steel heart rail combined obtuse angle frog, including a stock rail, a guard rail, an alloy steel heart rail, and a heel rail. A platen is provided at the bottom of the guard rail. Both the stock rail and the guard rail are processed from 60TY1 rails, and the widened side of the rail head faces the alloy steel heart rail. The width of the rail head gradually decreases from the symmetric axis of the stock rail to the bending points on both sides until it reaches the width of the rail head of a common 60 kg / m rail. From the bending point of the stock rail to the end, the width of the rail head remains unchanged at the width of the rail head of a common 60 kg / m rail. Within at least 450 mm from the end of the stock rail, the web of the rail maintains the same thickness as the web of a 60 kg / m rail. However, the method for implementing the processing of this solution is not involved. In response to this, the following technical solutions are now proposed. Summary of the Invention

[0008] The technical problem solved by the present invention: Provide a stock rail structure for an obtuse angle combined frog and its processing method, and solve the technical problems that the current alloy steel obtuse angle combined frog structure is relatively complex, inconvenient to assemble, has limited wear resistance and strength, and a relatively short service life.

[0009] The technical solution adopted by the present invention: A processing method for a stock rail structure of an obtuse angle combined frog, including the stock rail structure of the obtuse angle combined frog; the stock rail of the stock rail structure is made of a non-symmetric section 60TY1 rail; the wider side of the stock rail head of the stock rail structure away from the center line is used as the working edge; the processing method of the stock rail structure is completed by the method of first rough machining, then top bending, and then finish machining; or completed by the processing method of first finish machining and then top bending.

[0010] In the above technical solution, further: When completed by the method of first rough machining, then top bending, and then finish machining, the steps are as follows:

[0011] S001. During rough machining: A machining allowance of 3 - 10 mm is reserved between the end parts of the bending points according to the bending angle size, and is removed during finish machining.

[0012] S002. During top bending: Taking the symmetric axis as the center of symmetry, the stock rails on both sides are top bent respectively.

[0013] S003. During finish machining: Taking the symmetric axis as the center of symmetry, the working edges 1 on both sides are finish machined.

[0014] In the above technical solution, further: When completed by the processing method of first finish machining and then top bending, the steps are as follows:

[0015] S001. During finish machining: Taking the symmetric axis as the center of symmetry, the working edges 1 on both sides are finish machined, and a working edge reserved top bending deformation amount 6 is reserved within a certain range in the bending point area, where the length L and size T of the working edge reserved top bending deformation amount 6 are determined according to the bending angle.

[0016] S002. When top bending: When a top bending deformation allowance (6) is reserved for the finish-machined working edge, the straightness of the working edge (1) of the stock rail after top bending meets the standard requirements, improving production efficiency. In the above technical solution, preferably: In step S002, when top bending: The top bending inflection point is located within the range of 40 - 60 mm of the width of the two switch points.

[0017] In the above technical solution, further: In step S003, when finish machining: The stock rail can be machined alone, or the stock rail can be machined after being assembled into a frog.

[0018] In the above technical solution, further: The width of the rail head between the end of the 60TY1 rail and the inflection point is equal, and the width of the rail head gradually increases from the inflection point to the symmetric central axis and reaches the widest at the symmetric central axis.

[0019] In the above technical solution, further: The web of both ends of the 60TY1 rail is machined into the shape according to the section dimension of the 60 kg / m rail to meet the connection requirements of the line.

[0020] In the above technical solution, the bending angle is 4° - 7°; the length L is 150 mm - 300 mm, and T is 2 mm - 5 mm.

[0021] In the above technical solution, preferably: The bending angle is 4.8° - 6.3°; the length L is 150 mm - 250 mm, and T is 3 mm - 5 mm.

[0022] The present invention also claims a stock rail structure for an obtuse angle combination frog, which is a stock rail structure for an obtuse angle combination frog processed by any processing method for the stock rail structure of an obtuse angle combination frog.

[0023] Advantages of the present invention compared with the prior art:

[0024] 1. The stock rail structure and method solution of the obtuse angle combination frog of the present invention are relatively simple, easy to process, manufacture and assemble, the structure is relatively more stable, safe, has good smoothness, long service life, and meets the needs of the railway market.

[0025] 2. The present invention uses the side with a wider distance from the center line of the rail head of the asymmetric section 60TY1 rail for the working edge, which can not only completely eliminate the joints existing in the inlaid stock rail structure structurally, enhancing the smoothness and safety of the frog; but also due to the advantage that the rail head of the asymmetric section rail is larger than the rail head of the standard section 60 kg / m rail, the contact area between the stock rail and the wheel tread at the symmetric central axis is increased, improving the wear resistance and service life of the frog.

[0026] 3. Although the working edge side of the present invention is also processed, since the rail head of the asymmetric cross-section 60TY1 rail is relatively wide, the strength of the stock rail is not reduced. Instead, because the web thickness of the asymmetric cross-section 60TY1 rail is greater than that of the standard cross-section 60 kg / m rail, the strength of the stock rail is improved.

[0027] 4. When rough machining by the method of the present invention, a machining allowance of 3-10 mm is reserved, and finish machining can be carried out after the frog assembly, which reduces the difficulty of frog assembly and improves the frog assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1(a) to Figure 1(b) is a schematic structural diagram of manufacturing a stock rail with a standard cross-section 60 kg / m rail without machining the rail head;

[0029] Figure 2(a) to Figure 2(c) is a schematic structural diagram of manufacturing a stock rail with a standard cross-section 60 kg / m rail with machining the rail head;

[0030] Figure 3(a) to Figure 3(e) is a schematic structural diagram of manufacturing a stock rail with an asymmetric cross-section 60TY1 rail.

[0031] Figure 4 is a schematic diagram of the cross-sectional dimensions of a 60 kg / m rail.

[0032] Figure 5 is a schematic diagram of the cross-sectional dimensions of a 60TY1 rail.

[0033] Figure 6 is a schematic diagram of machining a stock rail with a 60TY1 rail by the present invention (the cross-hatched area is the rail head machining range).

[0034] Figure 7 is a schematic diagram of machining the working edge of the stock rail when reserving the top bending deformation amount by the present invention.

[0035] Figure 8 is a schematic diagram of the working edge of the stock rail when not reserving the top bending deformation amount by the present invention.

[0036] In the figures: 1 - working edge, 2 - vacant triangular area, 3 - intersection of working edges, 4 - rail limb machining area, 5 - depression of working edge, 6 - reserved top bending deformation amount of working edge, 7 - cross-hatched rail head machining range. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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 efforts shall fall within the protection scope of the present invention.

[0038] A processing method for the stock rail structure of an obtuse combination frog, including the stock rail structure of an obtuse combination frog; the stock rail of the stock rail structure is made of asymmetric section 60TY1 rail; the side of the stock rail head of the stock rail structure that is wider from the center line is used for the working edge 1; the processing method of the stock rail structure is completed by the method of first rough machining, then top bending, and then finish machining; or completed by the processing method of first finish machining and then top bending.

[0039] Regarding a scheme of the method of the present invention: Further: When completed by the method of first rough machining, then top bending, and then finish machining, the steps are as follows:

[0040] S001. During rough machining: A machining allowance of 3-10 mm is reserved between the end parts of the bending points according to the bending angle size, and it is removed during finish machining.

[0041] S002. During top bending: Taking the symmetric axis as the center of symmetry, top bend the two side stock rails respectively.

[0042] S003. During finish machining: Taking the symmetric axis as the center of symmetry, finish machine the two side working edges 1.

[0043] Regarding another scheme of the method of the present invention: Further: When completed by the processing method of first finish machining and then top bending, the steps are as follows:

[0044] S001. During finish machining: Taking the symmetric axis as the center of symmetry, finish machine the two side working edges 1, and reserve a working edge reserved top bending deformation amount 6 within a certain range in the bending point area, where the length L and size T of the working edge reserved top bending deformation amount 6 are determined according to the bending angle.

[0045] S002. During top bending: When finishing machining the working edge reserved top bending deformation amount (6), the straightness of the working edge (1) of the stock rail after top bending meets the standard requirements, improving production efficiency. When the working edge reserved top bending deformation amount (6) is not reserved, a working edge depression (5) appears on the working edge (1) of the stock rail after top bending.

[0046] In the above embodiments, preferably: In step S002, during top bending: The top bending point is located in the range of 40-60 mm of the width of the two switch points.

[0047] In the above embodiments, further: In step S003, during finish machining: The stock rail can be machined separately, or the stock rail can be machined after being assembled into a frog.

[0048] In the above embodiments, further: The width of the rail head between the end of the 60TY1 rail and the bending point is equal, and the width of the rail head gradually increases from the bending point to the symmetric axis and reaches the widest at the symmetric axis.

[0049] In the above embodiments, further: The web of both ends of the 60TY1 rail is processed and formed according to the section size of the 60 kg / m rail to meet the connection requirements of the line.

[0050] In the above embodiments: The bending angle is 4° to 7°; the length L is 150 mm to 300 mm, and T is 2 mm to 5 mm.

[0051] Embodiment 1: (maximum value) The bending angle is 7°; the length L is 300 mm, and T is 6 mm.

[0052] Embodiment 2: (optimal value) The bending angle is 4.8°; the length L is 200 mm, and T is 3 mm.

[0053] Embodiment 3: (optimal value) The bending angle is 6.3°; the length L is 200 mm, and T is 5 mm.

[0054] Embodiment 4: (minimum value) The bending angle is 4°; the length L is 150 mm, and T is 2 mm.

[0055] The present invention also claims to protect a stock rail structure for an obtuse combination frog, which is the stock rail structure for an obtuse combination frog processed by the processing method of any stock rail structure for an obtuse combination frog.

[0056] It can be found through the above description that: The stock rail structure and method solution of the obtuse combination frog of the present invention are relatively simple, easy to process, manufacture and assemble, the structure is relatively more stable, safe, has good smoothness, long service life, and meets the needs of the railway market.

[0057] The present invention uses the side of the 60TY1 rail with a wider head distance from the center line in the asymmetric section for the working edge, which can not only completely eliminate the joints existing in the inlaid stock rail structure structurally, enhancing the smoothness and safety of the frog; but also, due to taking advantage of the fact that the head of the asymmetric section rail is larger than the head of the standard section 60 kg / m rail, it increases the contact area between the stock rail at the symmetric axis and the wheel tread, improving the wear resistance and service life of the frog.

[0058] Although the present invention also processes the working edge side, due to the wider head of the 60TY1 rail with an asymmetric section, the strength of the stock rail is not reduced. Instead, because the web thickness of the 60TY1 rail with an asymmetric section is greater than that of the standard section 60 kg / m rail, the strength of the stock rail is improved.

[0059] When rough machining the method of the present invention, a machining allowance of 3 to 10 mm is reserved, and finish machining can be carried out after the frog is assembled, reducing the assembly difficulty of the frog and improving the assembly efficiency of the frog.

[0060] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0061] The above are only the preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A processing method for the stock rail structure of an obtuse angle combined frog, characterized in that, Including the stock rail structure for obtuse angle combined frog; the stock rail of the stock rail structure is made of asymmetric cross-section 60TY1 rail; the stock rail structure for obtuse angle combined frog includes a symmetric axis, a bending point, and a working edge (1). The rail head widths between the ends of the 60TY1 rail and the bending point are equal, and the rail head width gradually increases from the bending point to the symmetric axis and reaches the widest at the symmetric axis; the wider side of the stock rail head from the center line is used for the working edge (1); the processing method of the stock rail structure is: completed by the method of rough machining first, then top bending, and then finish machining; or completed by the processing method of finish machining first and then top bending. When completed by the method of rough machining first, then top bending, and then finish machining, the steps are as follows: S001. During rough machining: A machining allowance of 3 - 10 mm is reserved between the ends of the bending points for top bending according to the bending angle size and removed during finish machining. S002. During top bending: Taking the symmetric axis as the center of symmetry, top bend the stock rails on both sides respectively. S003. During finish machining: Taking the symmetric axis as the center of symmetry, finish machine the working edges (1) on both sides. When completed by the processing method of finish machining first and then top bending, the steps are as follows: S001. During finish machining: Taking the symmetric axis as the center of symmetry, finish machine the working edges (1) on both sides, and reserve a working edge reserved top bending deformation amount (6) within a certain range in the bending point area. The length L and size T of the working edge reserved top bending deformation amount (6) are determined according to the bending angle. S002. During top bending: When finishing machining the working edge reserved top bending deformation amount (6), the straightness of the working edge (1) of the stock rail after top bending meets the standard requirements.

2. The processing method for the stock rail structure of an obtuse angle combined frog according to claim 1, characterized in that: In step S002, during top bending: The top bending point is located within the range of 40 - 60 mm of the widths of the two switch rails.

3. The processing method for the stock rail structure of an obtuse angle combined frog according to claim 1, characterized in that: In step S003, during finish machining: The stock rail can be machined separately, or the stock rail can be machined after assembling into a frog.

4. The processing method for the stock rail structure of an obtuse angle combined frog according to claim 1, characterized in that: The rail waists at both ends of the 60TY1 rail are machined into the cross-section size of 60 kg / m rail to meet the connection requirements of the line.

5. The processing method for the stock rail structure of an obtuse angle combined frog according to claim 1, characterized in that: The bending angle is 4° - 7°; the length L is 150 mm - 300 mm, and T is 2 mm - 6 mm.

6. The processing method for the stock rail structure of an obtuse angle combined frog according to claim 5, characterized in that: The bending angle is 4.8° - 6.3°; the length L is 150 mm - 250 mm, and T is 3 mm - 5 mm.

7. A stock rail structure for an obtuse angle combined frog, characterized in that: The stock rail structure for obtuse angle combined frog processed by the processing method of the stock rail structure for obtuse angle combined frog according to any one of claims 1 to 6.

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