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Method for forging high cone stepped forging piece with axial hole

A technology of axial hole and step type, which is applied in the forging field of high-cone step forgings with axial hole, can solve the problems of material consumption and energy consumption, and achieve the effect of reducing the wear of the punch

Active Publication Date: 2014-05-07
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a forging method for a high conical step forging with an axial hole, which overcomes the problems of large material consumption and energy consumption in the prior art, and greatly improves the dimensional accuracy of the forging And quality and die life, forgings with axial through holes can be obtained, and the axial hole with the minimum diameter of the through hole is d=25~30mm, and the ratio of depth to diameter is 3~3.5

Method used

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  • Method for forging high cone stepped forging piece with axial hole
  • Method for forging high cone stepped forging piece with axial hole
  • Method for forging high cone stepped forging piece with axial hole

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Embodiment 1

[0023] Using this method and using 40Cr as the material, the die forging process of hollow tooth clutch forging is designed. Such as figure 1 As shown, a is the forging diagram of the current application process, and b and c are the forging diagrams of this embodiment.

[0024] The current production process of toothed clutch die forgings is carried out on a non-mechanized die forging production line on a hot die forging press with a nominal pressure of 25MN, and the average die forging productivity is 95 pieces / hour. The die forging blank is heated in a chamber flame furnace, and it is impossible to obtain an axial hole under this process condition.

[0025] Such as figure 2 As shown, in this embodiment:

[0026] Step 1, place the blank on a 16MN hot die forging press after intermediate frequency induction heating;

[0027] Step 2, proceed as figure 2 Upset as shown in a to obtain flange wrinkle; then proceed as follows figure 2 Die forging shown in b to obtain semi-...

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Abstract

The invention discloses a method for forging a high cone stepped forging piece with an axial hole in the technical field of automobile manufacturing. The method comprises the following steps: sequentially performing upsetting and die forging treatment on a thermal die forging press, and obtaining a semi-finished forging piece of which the shape is the same as that of a final forging piece and the height is lower than that of the final forging piece; punching on a clipping press, so as to enable the lower half part of a hub to reach a specified size; and finally, punching gross weight on the clipping press, removing flashes, and obtaining the high cone stepped forging piece with the axial hole. The problems of high material consumption and energy consumption in the prior art are solved, the dimensional accuracy and quality of the forging piece are greatly improved, the service life of the die is prolonged, a forging piece with an axial through hole can be obtained, the diameter d of the axial hole with the smallest diameter of the through hole is equal to 25-30mm, and a depth-diameter ratio is 3-3.5.

Description

technical field [0001] The invention relates to a method in the technical field of tractor and automobile manufacturing, in particular to a forging method for a high-cone stepped forging with an axial hole. Background technique [0002] In the tractor track transmission shaft, the gear clutch part is a conical hub with a flange and a through hole. The most effective way to obtain similar parts is metal pressure processing. Through such a process, high strength indicators of parts and excellent wear properties due to hardening of materials can be obtained, with high enough precision and productivity, and metal loss is also very little. However, this process is rarely used in practice. Because the size of the hole is small, the hole ≤30mm generally cannot be punched, and it is often forged into a blind hole, which cannot be realized by the traditional open die forging method. There is no doubt that this not only increases the loss of metal, but also increases the amount of m...

Claims

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Application Information

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IPC IPC(8): B23P13/02B21D28/32
CPCB21D28/32B23P15/14
Inventor 甘元张丹华陆以春陈波张添鑫
Owner JIANGSU BAOJIE FORGING
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