Forging forming process of rotating shafts for locomotive

A technology of forging forming and rotating shaft, applied in the field of forging, can solve the problems of mechanical properties, microstructure that cannot meet the conditions of use, long processing time of forgings, low material utilization rate, etc. cost effect

Inactive Publication Date: 2018-06-15
ZHUZHOU TIANLI FORGING IND
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Problems solved by technology

[0003] The method of free forging and then mechanical processing has large machining allowance, low material utilization rate and long manufacturing time; the method of radial (rotary) forging molding has long processing time and high noise, and requires special equipment for forging, which is only suitable for large Mass production; products formed by casting molding have internal defects such as pores and looseness, resulting in unstable quality, so that the mechanical properties and microstructure cannot meet the conditions of use

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  • Forging forming process of rotating shafts for locomotive
  • Forging forming process of rotating shafts for locomotive
  • Forging forming process of rotating shafts for locomotive

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Embodiment Construction

[0038] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0039] A forging forming process for a rotating shaft for a locomotive, comprising the following steps:

[0040] a. Blanking: select the raw material based on the appropriate specifications of the elongated length of the small-diameter rod and the upsetting height-to-diameter ratio of the large-diameter end.

[0041] The selection method of the specification of the raw material: the weight of the disc on the upper part of the rod M×(1+fire consumption coefficient)=the mass m of the raw material required at the large diameter end; then calculate the diameter specification of the raw material according to the required weight m of the raw material. The maximum allowable aspect ratio here is 5, that is, L / D≤5; according to m=ρ×V, because the raw materia...

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Abstract

The invention provides a forging forming process of rotating shafts for a locomotive. The forging forming process comprises the following steps of a, blanking, wherein raw materials are selected by taking appropriate specifications of the drawing length of a small-diameter rod and the upsetting height-diameter ratio of a large-diameter end as references; b, machining, wherein the raw materials areheated, the length of the raw materials which need to be drawn are positioned through a positioning device, and a preformed billet is formed by drawing the rod through a clamping die; and c, forging,wherein the preformed billet is put into a forming die and subjected to upsetting, and then a final forged part is obtained. According to the forging forming process of the rotating shafts for the locomotive, a distributed forging and local forming forging method is adopted, that is to say, a drawing process is adopted for the rod of the forged part, and an upsetting process is adopted for an endround cake, so that the production cost is low, and the die abrasion loss is low.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging forming process of a rotating shaft for a locomotive. Background technique [0002] At present, the difference between the maximum outer diameter and the minimum outer diameter of the rotating shaft for locomotives is more than 5 times. The small batch production of the same type of products is mainly manufactured by free forging and then mechanical processing. The large batches of the same type of products can also be manufactured by radial (rotation) The method of forging molding or casting molding. [0003] The method of free forging and then mechanical processing has large machining allowance, low material utilization rate and long manufacturing time; the method of radial (rotary) forging molding has long processing time and high noise, and requires special equipment for forging, which is only suitable for large Mass production; products formed by casting molding h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/06B21K7/12B21J5/06B21J5/08B21J5/02B21J1/06B21J13/02
CPCB21K1/06B21J1/06B21J5/025B21J5/06B21J5/08B21J13/02B21K7/12
Inventor 盛志敬牛迎春苏立武
Owner ZHUZHOU TIANLI FORGING IND
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