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Improved welding process for longitudinal joint grooves of thick-walled container barrels

A technology for container cylinders and thick-walled containers, which is applied in the field of improved welding technology, can solve the problems of large amount of deposited metal in the weld seam, high risk of welding defects, and long welding cycle, so as to improve production efficiency and save welding consumables , the effect of reducing labor intensity

Inactive Publication Date: 2018-01-30
ERZHONG GROUP ZHANJIANG HEAVY EQUIP FACTORYCO
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of X-type double-sided bevel produced by the existing gas cutting method, the risk of welding defects during the welding process, the amount of deposited metal in the weld seam is relatively large, the welding cycle is long, time-consuming and laborious, etc.

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  • Improved welding process for longitudinal joint grooves of thick-walled container barrels
  • Improved welding process for longitudinal joint grooves of thick-walled container barrels
  • Improved welding process for longitudinal joint grooves of thick-walled container barrels

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0031] The improved welding process for the longitudinal seam groove of the thick-walled container cylinder of the present invention is suitable for the process of making a thick-walled container cylinder from a steel plate with a plate thickness of more than 100 mm, and includes the following steps,

[0032] Step (A), measuring the thickness of the steel plate used to make the container cylinder, the thickness of the steel plate is 2-4mm larger than the wall thickness of the container cylinder to be produced;

[0033] Step (B), calculating the milling length of the steel plate, the specific process, as shown in the formula (1),

[0034] ΔL=πDm- L=π(Di+S)- L (1)

[0035] Among them, L is the e...

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Abstract

The invention discloses an improved welding process for longitudinal joint grooves of thick-walled container barrels. The improved welding process is applicable to steel plates thicker than 100mm. Theprocess includes: calculating straight length of a steel plate; marking a net material line and a center line on the steel plate; performing pre-bending and coiling forming; performing gas cutting toremove a pressure head of a three-roller plate bending machine from a container barrel section; performing processing of a narrow gap U-shaped groove according to the net material line; returning tothe three-roller plate bending machine to perform closing, rolling and aligning; finally starting a welding process; after welding is completed, subjecting the container barrel section to roundness correction. The improved welding process has advantages that a great quantity of welding materials are saved, labor intensity is relieved, production efficiency is improved, the once qualification rateof weld joints is greatly increased, and a promising application prospect is achieved.

Description

technical field [0001] The invention relates to an improved welding process for the groove of the longitudinal seam of a thick-walled container cylinder, which belongs to the field of welding technology. Background technique [0002] At present, many chemical plants and power plants need to install many large containers. In order to ensure the high strength requirements of the containers, the large containers are made of steel plate rolled cylinders. After the steel plates are rolled and shaped, the splicing and welding seams are all made by gas cutting. To make grooves, the existing method is generally X-shaped double-sided grooves, such as figure 1 As shown, the specific process is as follows: After the steel plate is pre-bent, measure the circumference of both ends of the cylinder with a disc ruler, record the length of the roll, draw the gas cutting line, remove the pressure head by gas cutting, and gas cut the X-shaped double-sided groove. However, in the pre-bending p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K37/00B23P15/00
Inventor 张洪伟孙亚杰殷辉朱莎莎
Owner ERZHONG GROUP ZHANJIANG HEAVY EQUIP FACTORYCO
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