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Achievement method of integral combined-tooth gear based on closed warm forging

An implementation method and technology of combining teeth, which are applied in the driving device, wheel, transportation and packaging of forging presses, can solve the problems of high forging temperature requirements, high production input cost, low material utilization rate, etc., and achieve low production equipment requirements. , the effect of low energy consumption and low production cost

Active Publication Date: 2017-06-13
SHANGHAI AUTOMOBILE GEAR WORKS
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AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the open hot forging process requires high forging temperature, reaching above 1100 ° C, long heating time, serious decarburization of the product, resulting in insufficient forging performance
In addition, due to the flash of forgings, the material utilization rate is low and the production input cost is high

Method used

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  • Achievement method of integral combined-tooth gear based on closed warm forging
  • Achievement method of integral combined-tooth gear based on closed warm forging
  • Achievement method of integral combined-tooth gear based on closed warm forging

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Embodiment 1

[0025] Such as figure 1 and figure 2 As shown, in this embodiment, the small diameter of the coupling teeth in a certain automobile transmission is Taking the fourth-speed driven gear as an example, the manufacturing process of the combined tooth gear forging is explained.

[0026] This embodiment includes the following steps:

[0027] S 1 , blanking: Calculate the weight of the forging according to the production and processing drawings of the four-speed driven gear forging, select a bar with a suitable diameter, determine the length of the bar, and use a circular saw for blanking according to the length of the bar; the nominal weight of the bar The same weight as the final forging;

[0028] S 2 , Shot blasting: Use a drum type shot blasting machine to remove scale and attachments on the surface of the bar for lubrication;

[0029] S 3 , Preheating: use an intermediate frequency heating device to heat the shot blasted bar to 150±20°C;

[0030] S 4 , pre-lubrication...

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Abstract

Provided is an achievement method of an integral combined-tooth gear based on closed warm forging. After a lubricant is sprayed to the surface of a preheated rod material and the rod material is heated to reach forging temperature, the integral combined-tooth gear is obtained through closed warm forging treatment including reshaping, blank making, pre-forging, finish forging and punching. The integral combined-tooth gear meeting the dimensional precision and performance requirements can be produced under the conditions of lower temperature and higher material utilization rate.

Description

technical field [0001] The invention relates to a technology in the field of material forming, in particular to a method for realizing an integral combined tooth gear based on closed warm forging. Background technique [0002] As one of the important components in the automobile transmission, the gear is mainly used to transmit large torque and alternating loads, so as to achieve the purpose of shifting and changing gears. Integral coupling gear is a kind of transmission gear that combines the coupling gear and the helical / straight transmission gear into one. This structure can reduce the length of the transmission shaft, and has the advantages of compact structure, flexibility and reliability, so it is widely used in transmission mechanisms of automobile transmissions. [0003] The integral combined tooth gear has a complex structure, high dimensional accuracy requirements, and harsh product service environments. Therefore, strict requirements are imposed on its processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J3/00B21J9/20B21J1/02B21J1/06B21K1/30
CPCB21J1/02B21J1/06B21J3/00B21J5/025B21J9/20B21K1/30
Inventor 周煊张海英吴先洋陈海韬刘畅
Owner SHANGHAI AUTOMOBILE GEAR WORKS
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