Pipeline steel two-in-one butt weld pipeline deep penetration high-speed welding process method

A butt weld and welding process technology, applied in the field of automatic welding of pipelines, can solve problems such as large penetration depth, low welding efficiency, and complicated process

Inactive Publication Date: 2021-07-06
南京奥特自动化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Deep penetration welding is an efficient welding technology with large penetration depth, which can be used in automatic welding of pipelines. In conventional welding, it is usually necessary to use tungsten argon arc welding to make the bottom and submerged arc to fill the cover. The process is complex and the welding efficiency is high. Low

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  • Pipeline steel two-in-one butt weld pipeline deep penetration high-speed welding process method
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  • Pipeline steel two-in-one butt weld pipeline deep penetration high-speed welding process method

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Embodiment Construction

[0025] This embodiment provides a pipeline steel two-to-one butt weld pipeline deep penetration high-speed welding process method, specifically as follows: 1. Welding equipment and materials

[0026] (1) The welding equipment is used in combination with electric welding machine and 219 cantilever welding positioner;

[0027] (2) The base material of the welding material is Q235B (low alloy steel), the specification is Φ273×10mm, the yield strength is >235Mpa, and the tensile strength is >415Mpa; the low alloy steel gas shielded welding wire JQ·MG50- with a wire diameter of Φ1.2mm is used 6.

[0028] 2. Preparation before welding

[0029] (1) Groove processing: V-shaped grooves are made on Q235B low-alloy steel by lathe processing. The groove angle is 30° on one side, the blunt side is 0-1mm, and the gap is 2-3mm. The roundness of the pipe needs to be corrected during the groove processing process. , to ensure that the amount of misalignment ≤ 1.5mm, such as figure 1 shown; ...

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Abstract

The invention discloses a pipeline steel two-in-one butt weld pipeline deep penetration high-speed welding process method, and relates to the technical field. The method is applied to a filling weld bead and a cosmetic weld bead, adopts downhill welding, and comprises the following steps that S1, a pipe fitting to be welded is cut off and bevelled by adopting a machining method, and rust and oil dirt near a groove of the pipe fitting are removed according to standard regulations; S2, a welding material matched with a base material and a dry, oil-free and rust-free welding wire special for pipeline steel are used, and pre-welding inspection is carried out on the used welding wire before welding; and S3, a 1G process method that a pipe rotates and the position of a welding machine head is not changed is adopted, welding is carried out without backing protection on the back face, and it is guaranteed that back face penetration is free of defects. Welding quality is guaranteed, procedures are simplified, deposition efficiency is high, and welding efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of automatic welding of pipelines, in particular to a pipeline steel two-to-one butt joint welding seam pipeline deep penetration high-speed welding process method. Background technique [0002] Pipeline steel is a low-alloy high-strength steel, mainly used to manufacture hot-rolled coils or wide and thick plates for oil and gas pipelines and containers. It is the most commonly used material for oil and gas pipelines, with high strength, high toughness and good weldability And other comprehensive properties, especially in the field of submarine oil and gas pipelines have a wide range of applications. Deep penetration welding is an efficient welding technology with large penetration depth, which can be used in automatic welding of pipelines. In conventional welding, it is usually necessary to use tungsten argon arc welding to make the bottom and submerged arc to fill the cover. The process is complex and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/235
CPCB23K9/0282B23K9/235B23K2101/10
Inventor 朱小明
Owner 南京奥特自动化有限公司
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