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Forming method for bearing steel multi-step large special-shaped ring

A special-shaped ring and multi-step technology, applied in the direction of metal rolling, etc., can solve the problems of affecting the forming effect, unreasonable matching between blank and mold, unreasonable blank or mold design, etc., and achieve the effect of overcoming more cross-sectional mutation areas

Inactive Publication Date: 2016-03-16
GUIZHOU ANDA AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For complex multi-step special-shaped rings, when this method is used for forming, the forming effect will be seriously affected due to the unreasonable design of the blank or the mold, or the unreasonable matching of the blank and the mold during the rolling process.

Method used

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  • Forming method for bearing steel multi-step large special-shaped ring
  • Forming method for bearing steel multi-step large special-shaped ring
  • Forming method for bearing steel multi-step large special-shaped ring

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specific Embodiment approach

[0032] The main chemical element content (weight percentage) of the steel is: C content 0.17% ~ 0.23%, Mn content 0.30% ~ 0.60%, Si content 0.15% ~ 0.40%, S content ≤ 0.030%, P content ≤0.030%, the content of Cr is 1.25%-1.75%, the content of Ni is 3.25%-3.75%, the content of Cu is ≤0.25, and the balance is Fe.

[0033] The steps of this method are as follows:

[0034] Step 1: Prepare intermediate ring blank

[0035] Such as figure 1 As shown, according to the structural characteristics of the bearing steel multi-step large special-shaped ring 1, the forging cross-section is cut layer by layer equidistantly from the height direction with the help of drawing software, and the cross-sectional area data of the multi-step large special-shaped ring 1 is obtained and a curve 2 is made, as shown in figure 2 As shown, the relationship between the cross-sectional area and height of the multi-step large-scale special-shaped ring 1 is obtained; then according to the change trend of th...

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Abstract

The invention discloses a forming method for a bearing steel multi-step large special-shaped ring. The forming method comprises the following steps: firstly, adopting drawing software to assist the preparation of an intermediate ring blank, and putting the intermediate ring blank in a ring rolling mill for rolling; during rolling, elevating a worktable top where the intermediate ring blank is located by 5mm-10mm to enable a main roller to contact with a lower end of the intermediate ring blank firstly and guarantee the filling of a die cavity with a metal material starting from bottom to top, thereby gradually completing the formation of all the steps, and then bulging the rolled multi-step large special-shaped ring. Such a method is capable of forming the multi-step large special-shaped ring, and also capable of effectively avoiding a phenomena of rib deviation or rib crossing during the formation of the multi-step large special-shaped ring, thereby improving the properties of the forging. The method is suitable for the formation of the bearing steel multi-step large special-shaped rings.

Description

technical field [0001] The invention relates to a forming method of a multi-step large-scale special-shaped ring, in particular to a forming method of a multi-step large-scale special-shaped ring of bearing steel. Background technique [0002] Special-shaped ring forgings are designed according to the contour of the part, which can effectively improve the utilization rate of materials, obtain ideal performance and streamlines that match the contour of the part. However, in reality, the shape of parts is often strange, and it is difficult to design completely according to the outline of the part. It can only be designed as a special-shaped ring forging that is similar to the cross-section of the part and is relatively simple. Compared with the rectangular ring forging, this method uses more materials. Although the rate has increased, the amount of improvement is limited. At present, most of the special-shaped rings formed by rolling are simple special-shaped rings, for examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/06B21H1/22
CPCB21H1/06B21H1/22
Inventor 王龙祥江锦权袁慧李明陈琪
Owner GUIZHOU ANDA AVIATION FORGING
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