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A method for forming a large-diameter thin-walled stainless steel cylinder

A technology of stainless steel cylinder and forming method, which is applied in the field of pressure vessel manufacturing, can solve problems such as difficulty in lifting, and achieve the effects of avoiding deformation, ensuring quality, and avoiding pollution

Active Publication Date: 2019-10-15
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for forming a large-diameter thin-wall stainless steel cylinder. The large-diameter thin-wall stainless steel cylinder formed by this method can solve the lifting difficulty, avoid ferrite pollution, and does not need to Turn over and ensure that the roundness of the cylinder meets the process design requirements

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  • A method for forming a large-diameter thin-walled stainless steel cylinder
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  • A method for forming a large-diameter thin-walled stainless steel cylinder

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with drawings and embodiments.

[0031] The forming method of the large-diameter thin-walled stainless steel cylinder of the present invention comprises the following steps:

[0032] 1) Pre-bending and processing groove: first calculate the expansion length of the cylinder of the design size, and then cut two rectangular stainless steel plates 1 whose length is half the expansion length of the cylinder from the raw material stainless steel plate, and then make the two stainless steel plates The two ends of 1 are processed to splicing grooves, and then the two ends of the two stainless steel plates 1 are pre-bent;

[0033] 2) Hoist to the tooling support and fix it with the tooling support: hoist the two stainless steel plates 1 in step 1) to their respective tooling supports with vacuum suction cups, and then fix the two stainless steel plates 1 on their respective tooling On the support, two stainles...

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Abstract

The invention discloses a forming method of a large-diameter thin-walled stainless steel barrel. The method includes the following steps that firstly, groove pre-bending and machining are conducted; secondly, stainless steel plates are hoisted to tool supports and fixed to the tool supports; thirdly, turnover is conducted; fourthly, assembling and longitudinal joint welding are conducted; fifthly, weld joint correction is conducted; and sixthly, the tool supports are detached. By means of the large-diameter thin-walled stainless steel barrel formed through the method, hoisting difficulty can be eliminated, ferrite pollution is avoided, the barrel does not need to be overturned, and it is ensured that the circular degree of the barrel meets the process design requirement.

Description

technical field [0001] The invention relates to the field of pressure vessel manufacturing, in particular to a method for forming a large-diameter thin-walled stainless steel cylinder suitable for nuclear power products. Background technique [0002] At present, in the field of pressure vessel manufacturing, the most common method of cylinder forming is to use a plate rolling machine to roll and form. This traditional plate rolling machine is usually only suitable for those cylinders with small diameter and large wall thickness. However, for large-diameter thin-walled stainless steel cylinders for nuclear power products (stainless steel cylinders with a diameter ≥ 5m and a wall thickness ≤ 5mm), if you continue to use a plate rolling machine to roll and form such large-diameter thin-walled Stainless steel cylinder, there will be some difficulties as follows: [0003] 1. Since the outer diameter of this type of stainless steel cylinder is usually ≥ 5m, if a plate rolling mac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 姚希程小刚郭光强张涛
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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