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Gear blank production technology method with hammer forging and die forging combined

A process method and technology of gear blanks, which are applied in the directions of wheels, transportation and packaging, vehicle parts, etc., can solve the problems of difficulty in guaranteeing mechanical properties, waste of metal materials, and large tolerances of gear blanks, etc. Material saving and small forging tolerances

Active Publication Date: 2013-06-19
韶关市中机重工有限责任公司
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AI Technical Summary

Problems solved by technology

[0002] Most of the existing EMU locomotive drive gear blanks are produced by a single forging method, such as single free forging or single ring rolling forging. The gear blanks produced by single free forging have a large tolerance margin and waste It is difficult to guarantee the mechanical properties of products using single rolling and ring forging. If it is applied to the driving device of railway EMU locomotives, there will be hidden dangers of accidents

Method used

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  • Gear blank production technology method with hammer forging and die forging combined
  • Gear blank production technology method with hammer forging and die forging combined
  • Gear blank production technology method with hammer forging and die forging combined

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Embodiment Construction

[0023] like figure 1 As shown, a kind of process method of adopting open die forging and die forging to produce gear blank according to the present invention, it comprises the following steps:

[0024] a) Making electroslag ingots: cast molten steel into steel ingots or continuous casting slabs for electroslag remelting to obtain electroslag ingots, and then anneal the electroslag ingots to eliminate stress; steel ingots or continuous casting slabs are being processed Before electroslag remelting, it is made of raw materials through smelting, LF refining, vacuum degassing, annealing and surface cleaning;

[0025] b) Prepare the blank before forging: Saw the head and tail of the electroslag ingot 1 and divide it by blanking to make the blank 2 before forging;

[0026] c) Heating of billet 2: heating the billet 2, the initial forging heating temperature is 1150°C to 1280°C;

[0027] d) First billet opening: free forging the heated billet 2 to make a round cake-shaped billet 3;...

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Abstract

The invention discloses a gear blank production technology method with hammer forging and die forging combined. The method comprises the steps that a) an electroslag ingot is manufactured; b) blank materials before forging are prepared; c) the blank materials are heated; d) first cogging is carried out; e) second cogging is carried out; f) an annular blank is heated; g) die forging is carried out; h) a gear is subjected to quenched-tempered heat treatment; i) gear blanks are sampled and tested; j) qualified gear blanks by testing are subjected to rough machining, and end products are formed. The gear blanks are produced in a mode that hammer forging and die forging are combined, forging tolerance allowance is small, materials are saved, mechanical performance of produced gear blank end products is high, and service life is long.

Description

technical field [0001] The invention relates to a process method for producing a gear blank, in particular to a process method for producing a gear blank of a locomotive driving device for a motor train unit by combining free forging and die forging. Background technique [0002] Most of the existing EMU locomotive drive gear blanks are produced by a single forging method, such as single free forging or single ring rolling forging. The gear blanks produced by single free forging have a large tolerance margin and waste It is difficult to guarantee the mechanical properties of products using single rolling and ring forging. If it is applied to the driving device of the locomotive of the railway EMU, there will be hidden dangers of accidents. Contents of the invention [0003] The object of the present invention is to address the shortcomings of the above problems and provide a process for producing gear blanks by combining free forging and die forging. The tolerance margin p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/30
Inventor 何玉全杜玉莲吕鹏昊吕明柯吴鸿丽
Owner 韶关市中机重工有限责任公司
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