Ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method

A thin-walled steel pipe and ultrasonic arc technology, applied in arc welding equipment, welding equipment, welding accessories, etc., can solve the problems of difficult weld forming control and application implementation, difficult determination of modifier components, and difficult application, etc., to achieve Promote the crystallization process of molten pool, reduce the residual stress, improve the effect of internal quality and performance

Active Publication Date: 2018-11-16
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual steel pipe welding process, the application of many methods is subject to certain restrictions
For different base metals and welding materials, it is difficult to determine the composition of the modifier; the meth

Method used

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  • Ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method
  • Ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method
  • Ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method

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Effect test

Embodiment 1

[0032] combine figure 1 As shown, the welding device for ultrasonic arc lamination and rolling of thin-walled steel pipes includes an ultrasonic arc generating device and a rolling lamination device.

[0033] combine figure 2 As shown, the rolling laminating device includes an upper rolling laminating wheel 5.1, a lower rolling laminating wheel 5.2 and a connecting bracket 5.3; the upper rolling laminating wheel 5.1 is mounted on a thin-walled steel pipe 4 The outer wall surface of the upper rolling and fitting wheel 5.1 radian curvature matches the outer diameter of the thin-walled steel pipe 4; the lower rolling and fitting wheel 5.2 is mounted on the inner wall of the thin-walled steel pipe 4 with zero clearance, and The radian curvature of the lower rolling and fitting wheel 5.2 matches the inner diameter of the thin-walled steel pipe 4; the positions of the upper rolling and fitting wheel 5.1 and the lower rolling and fitting wheel 5.2 correspond; the first end of the c...

Embodiment 2

[0043] The patent of the invention can improve weld seam defects of welded steel pipes and reduce the probability of cracking in the subsequent drawing process. In order to illustrate the treatment effect of the patented welded steel pipe of the present invention, 2507 duplex stainless steel provided by Shanghai Baosteel was selected as the base material for the test in Example 2.

[0044] 1) Selection of raw materials

[0045] The size of the steel strip is 2000mm×60mm×1mm, and the main chemical composition and mechanical properties are shown in Table 1 and Table 2:

[0046] The chemical composition (wt.%) of table 1 steel strip

[0047]

[0048] Table 2 Steel Strip Mechanical Properties

[0049]

[0050] 2) Welding method and equipment selection

[0051] Use a steel strip with a size of 2000mm×60mm×1mm to roll up the butt self-fusion welding, and first use acetone to remove the oil on the surface of the steel strip to ensure that there is no pollutant in the area to...

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Abstract

The invention belongs to the field of welding processes and discloses an ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method. The device comprises an ultrasonic arc generating device and a rolling and laminating device. An upper rolling and laminating wheel (5.1) is laminated to the outer wall surface of the thin-walled steel tube with zero clearance, and the radian curvature of the upper rolling and laminating wheel (5.1) is matched with the diameter of the outer side of the thin-walled steel tube; a lower rolling and laminating wheel (5.2) is laminated to the inner wall surface of the thin-walled steel tube with zero clearance, and the radian curvature of the lower rolling and laminating wheel (5.2) is matched with the diameter of the inner side of the thin-walled steel tube; and the upper rolling and laminating wheel (5.1) and the lower rolling and laminating wheel (5.2) correspond in position. The ultrasonic arc generating device introducesultrasonic arcs into a weld pool. The upper and lower rolling and laminating wheels are laminated to the steel tube in a rolling manner without zero clearance, so that grains of a weld joint of the steel tube are refined, the ductility of the weld joint is improved, and the tearing tendency in a follow-up drawing process is reduced.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an ultrasonic arc bonding and rolling thin-walled steel pipe welding device and a welding method. Background technique [0002] With the continuous improvement of welding technology and the emergence of new welding materials, welded steel pipes are gradually replacing seamless steel pipes. However, in the process of steel pipe welding metallurgy, weld slag inclusions, pores, weld seams and grains in the heat-affected zone are prone to occur. Coarse, weld residual tensile stress is large, resulting in defects such as performance degradation or cracks in the welded steel pipe during the drawing process or subsequent use. How to improve the quality of steel pipe welded joints has always been a research hotspot. In addition to improving the precise controllability of welding equipment and controlling welding process parameters, researchers have also been looking for other methods, s...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/32B23K101/06
CPCB23K9/167B23K9/32
Inventor 初雅杰王章忠毛向阳熊桑杨宗辉
Owner NANJING INST OF TECH
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