Method for manufacturing unequal thickness steel pipe

A manufacturing method and technology for thick steel pipes, applied in the field of thick steel pipe processing, can solve the problems of difficult rounding, complicated procedures, and difficult butt welding, etc., and achieve the effects of simple operation, high processing speed, and less tooling

Inactive Publication Date: 2015-12-02
YCIH STEEL STRUCTURE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the rolling is completed, they are welded together to form cylinders of unequal thickness. There are problems such as complicated procedures, difficult butt welding, and difficult round calibration.

Method used

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  • Method for manufacturing unequal thickness steel pipe
  • Method for manufacturing unequal thickness steel pipe
  • Method for manufacturing unequal thickness steel pipe

Examples

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Embodiment Construction

[0023] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only for illustrating the invention and are not intended to limit the scope of the invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0024] A method for manufacturing steel pipes of unequal thickness, the method steps are as follows:

[0025] Step 1: If figure 1 As shown, the thin steel plate 1 and the thick steel plate 2 with different thicknesses are connected into a steel plate of unequal thickness through full penetration welding; when two steel plates with different thicknesses are welded, the butt groove of the thin plate and the thick plate is figure 2 The K-shaped bu...

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Abstract

A method for manufacturing an unequal thickness steel pipe comprises: firstly, a thin steel plate (1) and a thick steel plate (2) that have different thicknesses are connected as an unequal thickness steel plate by welding; secondly, a roller machine is used to pre-roll two external ends of the thick steel plate and the thin steel plate that are constituted of the unequal thickness steel plate; through reciprocating roll of a lower roll wheel (3) and an upper roll wheel (4), two ends of the unequal thickness steel plate are rolled to warp upwardly; thirdly, areas except the two warped ends of the unequal thickness steel plate are rolled to make the steel plate gradually roll as a pipe shape; fourthly, misaligned edges (6) at two end ports of longitudinal seams (5) that are about to be closed and misaligned edges (7) of an outer round camber at two ends of the abutted unequal thickness steel plate are rectified and welded and the longitudinal seams are abutted, thus forming an unequal thickness steel pipe; Lastly, the roundness is rectified. According to the invention, the existing conventional roller machine is adopted to roll the unequal thickness steel plate as an unequal thickness steel pipe with arc shape.

Description

technical field [0001] The invention relates to the field of steel pipe processing, in particular to a method for processing steel pipes of unequal thickness. Background technique [0002] Steel tube processing, especially the processing of wind power tower tubes, generally adopts coiled tube technology. The processing of wind power tower tubes has always been made of steel pipes with equal wall thickness. In recent years, in order to save costs, steel pipes of unequal thickness are designed. Most of the wall thickness of the steel pipes are made of thin plates, and only thick plates are required for the parts where the door frame is installed. But existing roller machine is all designed according to coiling equal-thickness steel pipe, and existing coiling technology all is to adopt equal-thickness steel coiling steel pipe. [0003] The thickness of the wind power tower is determined by two factors, one is the structural strength requirements of the tower, and the other is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 胡相伟徐飞罗剑锋孙科冯智江陈龙山殳丽彩
Owner YCIH STEEL STRUCTURE CO LTD
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