Method for determining dimensions of ring radially-axially rolled blank

A blank size, axial rolling technology, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of unguaranteed product performance, long production cycle and high cost

Inactive Publication Date: 2010-09-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In order to overcome the problems existing in the prior art, such as long production cycle, high cost, unguaranteed product performance, or low design efficiency of ring rolling blanks, the present invention proposes a method for determining the ring diameter and axial rolling blanks. size method

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  • Method for determining dimensions of ring radially-axially rolled blank
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  • Method for determining dimensions of ring radially-axially rolled blank

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Embodiment Construction

[0075] This embodiment is a method for determining the diameter and axial rolling blank size of a ring, and the specific steps are as follows:

[0076] Step 1, determine the blank size calculation formula, the blank size includes the outer diameter D of the ring blank 0 , inner diameter d 0 , height h 0 , wall thickness b 0 ;

[0077] as shown in picture 2. There are three deformation modes in the radial and axial rolling forming process of the ring: (a) wall thickness reduction, height reduction, and diameter expansion, as shown in Fig. 2(a); (b) wall thickness reduction, height The diameter remains unchanged, as shown in Figure 2(b); (c) the wall thickness decreases, the height increases, and the diameter expands. In Figure 2, D 0 , d 0 , h 0 , b 0 are the outer diameter, inner diameter, height and wall thickness of the ring blank; D f , d f , h f , b f are the outer diameter, inner diameter, height and wall thickness of the final ring, respectively; α is the an...

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Abstract

The invention discloses a method for determining the dimensions of a ring radially-axially rolled blank, which comprises: firstly, determining a blank dimension calculation formula and the ranges of the values of a rolling ratio k and a radial-axial deformation distribution ratio tana and obtaining the outside diameter Df, inside diameter df, height hf and wall thickness bf of a ring forging and the diameter dm of a core roller; secondly, determining the deformation mode for ring radial-axial rolling; thirdly, calculating and determining the ranges of the values of the rolling ratio k and the radial-axial deformation distribution ratio tana according to the obtained dimensions of the ring forging and the core roller and the determined deformation mode; and finally, selecting a value of the rolling ratio k and the value of the corresponding radial-axial deformation distribution ratio tana according to determined ranges of the values and the deformation mode, calculating the wall thickness b0 of the blank in the corresponding deformation mode, and finally obtaining the height h0, outside diameter D0 and inside diameter d0 of the blank in the corresponding deformation mode. In the invention, for the rolling of a certain ring forging, a series of different rolling ratios k and radial-axial deformation distribution ratios tana of the blank can be designed, the design efficiency and product performance of the ring radially-axially rolled blank are improved, the production period is shortened, the production cost is reduced, and an important method and foundation are provided for researches on the optimization design of the rolling processes (including the rolling process of the blank).

Description

technical field [0001] The invention belongs to the field of rolling and forming processing of rings, in particular to a method for determining the diameter and axial rolling blank size of rings. Background technique [0002] In the radial and axial rolling process of rings, the blank size is an important geometrical process parameter. Whether the blank size design is reasonable or not determines whether the radial and axial rolling process of the ring can be successfully realized, and has an important influence on the optimal design of the rolling process parameters and the performance of the final ring product. The current method of determining the size of the blank depends on experience to directly determine the size of the blank. The design method is rough and lacks scientific basis. As a result, the size of the rolled ring forging is quite different from the size of the final ring product, and a large number of subsequent cutting processes are required. Waiting for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00B21H1/06
Inventor 郭良刚杨合
Owner NORTHWESTERN POLYTECHNICAL UNIV
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