Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle

A technology of spiral bevel gears and automobile rear axles, which is applied to vehicle parts, railway car body parts, forging/pressing/hammer devices, etc., can solve the problems of low material utilization rate, complicated process, and low mold life, and achieve material The effect of high utilization rate, simple process and low cost

Inactive Publication Date: 2012-07-18
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for precision hot forging of driven spiral bevel gears of automobile rear axles, which solves the problems of complicated and inefficient traditional

Method used

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  • Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle
  • Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle
  • Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle

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Embodiment 1

[0032] A driven spiral bevel gear for an automobile rear axle ( figure 1 , figure 2 ) The method of precision hot forging is carried out according to the following steps:

[0033] (1) First design the shape of each forming step of the forging, calculate the size of the bar based on the principle of equal volume, ensure a suitable height-to-diameter ratio, and then turn the cylindrical bar ( image 3 a), the oxide skin on the surface of the blank can be turned off first to improve the blanking accuracy.

[0034] (2) Heat the rolled bar to 1100-1200°C, take it out and put it under the press for upsetting, and upsetting into a round cake-shaped upsetting piece ( image 3 b).

[0035] (3) Put the upsetting piece into the pre-forging die and forge it into a pre-forging with upper and lower blind holes ( image 3 c), the pre-forging is ring-shaped, the shape is close to the final forging, the difference is that there is no tooth shape.

[0036] (4) Take out the pre-forging and...

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Abstract

The invention discloses a method for precisely carrying out hot forging on a driven spiral bevel gear of an automobile rear axle, belonging to the technical field of plastic formation. The method comprises the operation steps of: firstly, heating a cylindrical blank with a pre-calculated size to a temperature of 1100-1200 DEG C; then, upsetting the blank to be cake-shaped; thirdly, placing an upset piece into a pre-forging die for pre-forging; then, placing a pre-forged piece into a punching die for punching a part of skin on an inner hole; and finally, placing a punched piece into a finishing die for finishing. With the adoption of the method disclosed by the invention, the driven spiral bevel gear is heated just for one time; the production efficiency is high; a great amount of materials are saved; and the service life of dies is long, so that the method is applicable to large-scale production. The precisely-forged spiral bevel gear only needs little follow-up cutting machining. The organization property and the mechanical property of the precisely-forged spiral bevel gear are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of plastic forming, and in particular relates to a method for precision hot forging of a driven spiral bevel gear of an automobile rear axle. Background technique [0002] Spiral bevel gear is a widely used mechanical transmission element, mainly used to transmit the movement between two intersecting or interlaced shafts, and it is a common part used in a large amount and in a wide range in the automobile industry. Spiral bevel gears are generally used for high peripheral speed transmission. Compared with straight bevel gears, they have the advantages of large transmission ratio, stable transmission, low meshing noise, and long service life. A spiral bevel gear pair generally consists of a pair of spiral bevel gears, namely a driving spiral bevel gear and a driven spiral bevel gear. [0003] The traditional production process of spiral bevel gears includes multiple processes such as blanking, forging, rough...

Claims

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Application Information

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IPC IPC(8): B21K7/12B21J13/02
Inventor 陈英梁好赵扬扬
Owner CHINA AGRI UNIV
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