Forming method for large special-shaped structural steel multi-step ring piece

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: 2016-03-09
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 large special-shaped structural steel multi-step ring piece
  • Forming method for large special-shaped structural steel multi-step ring piece
  • Forming method for large special-shaped structural steel multi-step ring piece

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specific Embodiment approach

[0032] The main chemical element content (weight percentage) of the steel is: C content 0.34% ~ 0.42%, Mn content 0.50% ~ 0.80%, Si content 0.17% ~ 0.37%, S content ≤ 0.015%, P content ≤0.025%, Cr content 0.08%~1.10%, Ni content ≤0.40%, Cu content ≤0.25, balance 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 structural steel multi-step large-scale special-shaped ring 1, the cross-section of the forging is cut equidistantly layer by layer from the height direction with the help of drawing software, and the cross-sectional area data of multi-step large-scale special-shaped ring 1 is obtained and 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 the cross-sectional area and height ...

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Abstract

The invention discloses a forming method for a large special-shaped structural steel multi-step ring piece. The forming method includes the steps that an intermediate ring billet is manufactured through the assistance of graphics software, and the intermediate ring billet is placed in a looping mill to be rolled; in the rolling process, a working table top where the intermediate ring billet is located is lifted by 5-10 mm to enable a main roller to make contact with the lower end of the intermediate ring billet firstly, and it is guaranteed that a mold cavity starts to be filled with metal materials from bottom to top to complete forming of all steps gradually; and then the rolled large special-shaped structural steel multi-step ring piece is subjected to bulging. By means of the method, the large special-shaped structural steel multi-step ring piece can be formed, the rib deviating or rib crossing phenomenon in forming of the large special-shaped structural steel multi-step ring piece can be effectively avoided, and therefore the performance of the forged piece is improved. The method is suitable for forming of the large special-shaped structural steel multi-step ring piece.

Description

technical field [0001] The invention relates to a method for forming a multi-step large-scale special-shaped ring, in particular to a method for forming a multi-step large-scale special-shaped ring of structural 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 ...

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 苏春民黎汝栋夏春林任腾飞李艳红
Owner GUIZHOU ANDA AVIATION FORGING
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