Topic
Butt welding
About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.
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Patent•
10 Nov 2010TL;DR: In this paper, a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward.
Abstract: In a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward. As a result, the opening of a short circuit is urged to reduce the frequency at which welding is unnecessarily interrupted by an overcurrent protection function. This achieves high weld quality such as the absence of welding defects, and high production efficiency.
13 citations
18 Jul 2018
TL;DR: In this paper, static tensile tests were conducted on 26 butt welded joints on base steel of Q690 grade high-strength steel, which exhibits softening behaviour in the heat-affected zone (HAZ).
Abstract: Static tensile tests were conducted on 26 butt welded joints on base steel of Q690 grade high-strength steel, which exhibits softening behaviour in the heat-affected zone (HAZ). Considering the cha...
13 citations
Patent•
23 Nov 1971TL;DR: In this paper, the tandem electrodes are moved at 50 to 120 cm/min, relative to the joint, while passing a current I1 of 1,000 to 2,000 amperes through the leading electrode, while keeping the trailing electrode current I2 to one-fourth to four-fifths of I1 and the arc voltage of the lead electrode at (I1/40)+15 to (I 1/40)-35 volts.
Abstract: A method for submerged-arc welding of a square butt joint from opposite surfaces thereof, by using tandem electrodes. The tandem electrodes are moved at 50 to 120 cm/min, relative to the joint, while passing a current I1 of 1,000 to 2,000 amperes through the leading electrode, while keeping the trailing electrode current I2 to one-fourth to four-fifths of I1 and the arc voltage of the leading electrode at (I1/40)+15 to (I1/40)+35 volts. The welding operations from the opposite surfaces are conducted under similar conditions.
13 citations
Patent•
18 Apr 2012
TL;DR: In this paper, the authors presented a positioning device for a thin-walled cylinder with a seal head, which consists of a pressing plate, a pipe sleeve, a pull rod, a support body, a cone, a bulging block, a copper cushion block, countersunk screw, a band spring, an adjusting nut, a gasket and a locking nut.
Abstract: The invention discloses a butt welding positioning device for a thin-walled cylinder with a seal head, and belongs to the technical field of process equipment. The device is mainly technically characterized by comprising a pressing plate, a pipe sleeve, a pull rod, a support body, a cone, a bulging block, a copper cushion block, a countersunk screw, a band spring, an adjusting nut, a gasket and a locking nut, wherein the pressing plate is adjusted by the adjusting nut to position a workpiece; the cone is pulled by the pull rod to jack and bulge the three-flap bulging block; the bulging block centers, bulges and clamps the workpiece to be welded; the taper of the inner wall of the bulging block is the same as that of the external surface of the cone; and a radial annular groove is formed on the surface of the copper cushion block. The assembly positioning problem of the thin-walled cylinder with the seal head and a thin-walled hollow cylinder during butt welding can be effectively solved, welding deformation is effectively reduced, and the device has the advantages that: the device has a simple structure, is convenient to assemble and disassemble and is operated and used reliably.
13 citations
TL;DR: In this paper, a finite element method was used to study the distribution of stress and strain in the interlayer during the onset of yielding, through general yielding, to a strain of 12%.
13 citations