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59R2 special-shaped rail and forming method thereof

A special-shaped rail and forming section technology, which is applied in the field of 59R2 special-shaped rail and its forming, can solve the problems of difficult mold blank metal, poor process precision, and low forging quality, and achieve the effects of weakening wear and tear, improving quality, and improving forging quality

Active Publication Date: 2015-03-25
CHINA RAILWAY BAOJI BRIDGE GRP
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AI Technical Summary

Problems solved by technology

The method of forming the 59R2 special-shaped rail with an asymmetric cross-section by using the asymmetric movable block combined mold structure solves the problems that the mold blank metal is not easy to flow, the quality of the forging is not high, and the process precision is poor in the existing forming method

Method used

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  • 59R2 special-shaped rail and forming method thereof
  • 59R2 special-shaped rail and forming method thereof
  • 59R2 special-shaped rail and forming method thereof

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Embodiment Construction

[0021] Attached below Figure 1-7 An embodiment of the present invention is described.

[0022] A 59R2 special-shaped rail is composed of a raw material section a, a profiled transition section b, and a forming section c. The forming section c has an offset from the center line of the rail waist of the original material section a, and the offset is 20mm; the forming section The length of section c is 450mm, and the length of profiled transition section b is 150mm. The width of the rail bottom 1-3 of the forming section c is 150mm, and the cross-section of the forming section c removes the existing standard 59R2 rail head II difficult-to-form flange groove 4, which solves the problem of easy folding and The problem of forgings that are not easy to be filled makes the metal flow and distribute better, greatly improves the quality of forgings, and also provides convenience for subsequent machining; Compared with the existing 59R2 special-shaped rail, it is revised based on the ...

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Abstract

The invention provides a 59R2 special-shaped rail and a forming method thereof. The 59R2 special-shaped rail is composed of a raw material section, a profiling transition section and a forming section. The rail waist centerline of the forming section and the rail waist centerline of the raw material section have 20 mm offset, and the cross section of the forming section is an asymmetric cross section. The forming method of the 59R2 special-shaped rail includes the following steps of inductive heating or natural gas fuel heating before forging, preforging conducted through an asymmetric preforging die, finish forging conducted through an asymmetric finish forging die, normalizing heat treatment after forging, air cooling of a forged piece to a room temperature after forging and machining after forging, an asymmetric movable block combination die structure is adopted for the forging dies, the problems that according to an existing forming method, blank metal of a die is not prone to flow, the quality of a forged piece is low and process precision is poor are solved, and the forming method is suitable for high-precision, high-quality and high-efficiency production of the 59R2 special-shaped rail matched with 50kg / m-59R2 type steel rails.

Description

technical field [0001] The invention belongs to the technical field of railway turnout manufacture, and in particular relates to a 59R2 special-shaped rail suitable for 50kg / m-59R2 type steel rail and a forming method thereof. Background technique [0002] As a transition piece between different rail types, special-shaped rails have the advantages of reliable installation, smooth train operation, and low maintenance costs compared with traditional special-shaped splints, so they are suitable for promotion. Now the track lines laid with 59R2 rails are in the initial promotion stage. With the increase of the laying mileage of this line, sufficient market space is provided for the demand for special-shaped rails suitable for this type of rail. Existing special-shaped rails are formed by thermally forging one rail with a symmetrical cross-section into another rail with a symmetrical cross-section, and there is no working side and non-working side. The present invention molds a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B5/02B21J5/02B21J13/02B21J1/06
CPCB21J1/06B21J5/02B21J13/02E01B5/02
Inventor 高尚君董彦录高凡高银霞程亮费维周李文博
Owner CHINA RAILWAY BAOJI BRIDGE GRP
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