Design method of middle blank and prefabricating blank during conical shell forgeable piece forming process

A conical cylinder and forming process technology, applied in the field of forging, can solve the problems of reducing the machining allowance of conical cylinder forgings, the accuracy of machining dimensions cannot be guaranteed, and shortening the production cycle of products, so as to reduce research costs and shorten the production cycle , The effect of shortening the product production cycle

CN101537468BActive Publication Date: 2010-07-21INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-07-21

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Abstract

The invention relates to a design method of a middle blank and a prefabricating blank during a nuclear power and hydrogenation reaction chamber conical shell forgeable piece forming process, which belongs to the filed of forging and is suitable for the production engineering and a manufacturing process of nuclear power and hydrogenation reaction chamber conical shell forgeable piece forming. The invention adopts a method of combining an analysis method and finite element modeling to develop a dimension relational expression of the prefabricating blank, the middle blank and a final forgeable piece during the nuclear power and hydrogenation reaction chamber conical shell forgeable piece forming process and provides the design method of the middle blank and the prefabricating blank. The design method and a design formula of the middle blank and the prefabricating blank during the nuclear power and hydrogenation reaction chamber conical shell forgeable piece forming process are suitable for producing significant parts, such as megawatt nuclear power conical shells, large-sized hydrogenation reaction chamber conical shells, and the like; when the middle blank and the prefabricating blank designed by the design method are adopted to produce conical shell forgeable pieces, the middle blank and the prefabricating blank designed by the design method can nicely control the conicity of the conical shell forgeable pieces, thereby solving the problem of the difficult forming and the unreliable machining dimension precision of traditional conical shell forgeable pieces.
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Description

technical field

[0001] The invention belongs to the field of forging, specifically a design method for an intermediate billet and a preform in the forming process of a conical cylinder forging of a nuclear power and hydrogenation reactor, which is suitable for forming a conical cylinder forging of a nuclear power and hydrogenation reactor Process design and manufacturing process. Background technique

[0002] The conical cylinder is one of the most important parts of nuclear power evaporators and petrochemical hydrogenation reactors. Forgings often weigh more than 100 tons and have a diameter of more than 5 meters. Due to their special service environment, there are extremely high impacts on the structure and performance of forgings. It is very difficult to manufacture such forgings. At present, most of such forgings in my country rely on imports, and sometimes they cannot be bought even with money, which seriously restricts the development of my country's nuclear power and p...

Examples

Embodiment

[0114] The forged part in this embodiment is a pilot test forging of a conical cylinder of a certain type of nuclear power evaporator, and the inner diameter of the large end of the final forging is required to be r 2 =815mm, outer diameter R 2 =1000mm, wall thickness t 2 =185mm, height H 2 =1350mm, taper θ 2 = 11.1°. take k 1 =1.07,k 2 = 1.05, δ = 1.65.

[0115] In the process of reaming from the intermediate billet to the final forging, it can be obtained from the formula (4):

[0116] h 1 =H 2 / k 2 =1350 / 1.05=1286mm

[0117] From formula (12):

[0118] t 1 =δ·t 2 =1.65×185=305mm

[0119] From the formula (6):

[0120] R 1 = t 1 2 + k 2 ( 2 R 2 t ...