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T-shaped welding method

A welding method and welding parameter technology, applied in the field of T-shaped welding, can solve problems such as deformation, affecting the welding accuracy of flanges, and reducing the structural matching of connecting parts of welded products.

Inactive Publication Date: 2016-04-13
ZHEJIANG SHENGDA STEEL TOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that when the flange is welded on the surface of the steel pipe, it is easy to deform due to welding, which affects the welding accuracy of the flange and reduces the structural matching degree of the welded product as a connecting part, and provides a T-shaped welding method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The diameter of the steel pipe is 1400mm, the ring dimension difference of the flange is 145mm, and the thickness of the steel pipe and the flange is 20mm.

[0024] 1. Welding flange welding end bevel opening:

[0025] The groove includes an inner groove on one side of the welding end of the flange and an outer groove on the other side of the welding end of the flange. The groove angle of the inner groove is 45°, and the depth of the inner groove is is 11mm; the groove angle of the outer groove is 50°, and the depth of the outer groove is 8mm; the blunt edge size is 1mm.

[0026] 2. Positioning welding

[0027] During tack welding, the circumferential welding spots are evenly arranged, the distance between the inner groove welding spot and the outer groove welding spot is 200mm-210mm, and the length of the inner groove welding spot and the outer groove welding spot is 40mm- 45mm.

[0028] 3. Welding

[0029] d. Adjust the welding parameters of the unit welding, so t...

Embodiment 2

[0038] The diameter of the steel pipe is 1600mm, the ring size difference of the flange is 150mm, and the thickness of the steel pipe and the flange is 25mm.

[0039] 1. Welding flange welding end bevel opening:

[0040] The groove includes an inner groove on one side of the welding end of the flange and an outer groove on the other side of the welding end of the flange. The groove angle of the inner groove is 45°, and the depth of the inner groove is is 14mm; the groove angle of the outer groove is 50°, and the depth of the outer groove is 9mm; the blunt edge size is 2mm.

[0041] 2. Positioning welding

[0042] During tack welding, the circumferential welding spots are evenly arranged, the distance between the inner groove welding spot and the outer groove welding spot is 210mm-220mm, and the length of the inner groove welding spot and the outer groove welding spot is 40mm- 45mm.

[0043] 3. Welding

[0044] d. Adjust the welding parameters of the unit welding, so that t...

Embodiment 3

[0053]The diameter of the steel pipe is 1900mm, the ring size difference of the flange is 155mm, and the thickness of the steel pipe and the flange is 30mm.

[0054] 1. Welding flange welding end bevel opening:

[0055] The groove includes an inner groove on one side of the welding end of the flange and an outer groove on the other side of the welding end of the flange. The groove angle of the inner groove is 47°, and the depth of the inner groove is The groove angle of the outer groove is 52°, and the depth of the outer groove is 11mm; the blunt edge size is 2mm.

[0056] 2. Positioning welding

[0057] During tack welding, the circumferential welding spots are evenly arranged, the distance between the inner groove welding spot and the outer groove welding spot is 220mm-230mm, and the length of the inner groove welding spot and the outer groove welding spot is 45mm- 50mm.

[0058] 3. Welding

[0059] d. Adjust the welding parameters of the unit welding, so that the weldin...

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Abstract

The invention belongs to the technical field of welding, relates to a T-shaped welding method, and aims to solve the problems of influence on the welding precision of a flange and reduction of structural matching degree of a finished welding product as a connecting part caused by deformation of the flange due to welding on the surface of a steel pipe. The T-shaped welding method comprises a flange welding end groove forming step and a flange welding end groove welding step. The T-shaped welding method can effectively solve the technical problems.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a T-shaped welding method. The raw materials of the T-shaped welding method are steel pipes and flanges, and the formed T-shaped welding seam is located on the outer surface or inner surface of the steel pipe. The caliber of the steel pipe is The thickness of the steel pipe is 20mm-50mm, and the difference between the outer diameter and inner diameter of the flange is 100mm-180mm. Background technique [0002] At present, the connection nodes of large-scale pipe towers are mainly single flanges with stiffened plates. With the increase of the height of the pipe tower, the requirements for the connection strength of the flange joints are getting higher and higher, which requires an increase in the number of bolts at the joints, resulting in bolts and stiffened plates. The distance between them is reduced, which not only brings certain difficulties to the welding of flanges and sti...

Claims

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Application Information

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IPC IPC(8): B23K9/02B23K9/235B23K33/00B23K101/04B23K103/04
CPCB23K9/02B23K9/0026B23K9/235B23K33/00B23K2101/04B23K2103/04
Inventor 舒芳李朋戴刚平包镇回葛晓峰袁涛龚飞彭旭东
Owner ZHEJIANG SHENGDA STEEL TOWER