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Manufacturing method of thick-wall high-drum annular forging

A manufacturing method and ring forging technology, applied in metal rolling and other directions, can solve the problems of low press precision, large forging allowance, and low production efficiency, and achieve uniform and stable structure and performance, reduce forging allowance, and improve the structure and performance excellent effect

Active Publication Date: 2013-05-22
AVIC EXCELLENCE FORGING WUXI
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this manufacturing process, the production efficiency is not high, and the forging allowance is large due to the low precision of the press
At the same time, the press deforms in stages, it is difficult to control the amount of deformation, resulting in uneven deformation of the product and affecting the tissue performance of the product
[0003] Therefore, there are serious defects in the manufacturing method for large-scale thick-walled high-tube ring forgings in the prior art, and cannot be better applicable to actual production

Method used

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  • Manufacturing method of thick-wall high-drum annular forging

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Embodiment Construction

[0028] The method for manufacturing thick-walled high-tube annular forgings of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, firstly, the blank 1 (the blank in the figure is a steel ingot) is drawn axially on the press; then the blank 1 is upset radially on the press, and then drawn axially, and then Radial upsetting, so that the casting structure of the billet 1 is improved, and the grains are refined; then a long mandrel is used to punch a hole in the center of the billet 1; and the billet 1 is elongated in the axial direction, while using Elongate the core roller 2 to expand the inner hole; finally, the product is formed by simultaneous radial and axial rolling on the ring rolling machine.

[0030] Preferably, the forging ratio of elongation and upset in the step a and step b is in the range of 3-5.

[0031] Preferably, in the step d, the surface of the long mandrel is sprayed wit...

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Abstract

The invention relates to a manufacturing method of a thick-wall high-drum annular forging. The manufacturing method of the thick-wall high-drum annular forging comprises the following steps: a, firstly stretching blank 1 along the axial direction on a press machine; b, and then upsetting the blank 1 along the radial direction on the press machine; repeatedly conducting the step a and the step b, improving cast structures of the blank 1, and refining grains; then punching holes in the center of the blank by using a long core rod; stretching the blank 1 along the axial direction and expanding inner holes by using a stretching core roller 2; lastly, simultaneously rolling along the axial and radial direction on a ring rolling machine to complete production forming. The manufacturing method of the thick-wall high-drum annular forging overcomes the defect existed in the existing technology, and is suitable for application of actual production.

Description

technical field [0001] The invention relates to a method for manufacturing a thick-walled high-tube annular forging. Background technique [0002] At present, large-scale thick-walled high-tube annular forgings, that is, the wall thickness is greater than 100mm, the height is greater than 1000mm, the weight is greater than 10 tons, and the diameter is greater than 2000mm. Generally, large-scale forging presses are used for free forging production, and generally require larger tonnage forging presses. The reaming deformation of the horse frame is completed. With this manufacturing process, the production efficiency is not high, and because the precision of the press is not high, the forging allowance is relatively large. At the same time, the press deforms in stages, and it is difficult to control the amount of deformation, resulting in uneven deformation of the product and affecting the tissue performance of the product. [0003] Therefore, there are serious defects in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/06
Inventor 沈志远张俊宋旭东吴军
Owner AVIC EXCELLENCE FORGING WUXI
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