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

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...

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 method of mechanical vibration and swinging arc is difficult to control and apply the weld seam; it is very difficult to introduce ultrasonic waves into the welding pool by using ultrasonic source alone. Difficult to apply during welding

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