Butt welding

About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.

Heating-welding tool for thermoplastic materials - having working faces profiled in parallel manner relative to each other to increase joining face

Abstract: Heating-welding tool for welding thermoplastic materials, esp. for butt welding, has working faces (2) profiled in a parallel manner relative to each other so that the joining face (4) facing the cross sectional face (5) of the parts (3) to be welded is increased in area. Welded joints with the same strength as the base material are otained.

Welding of high thicknesses using a fibre optic laser up to 30 kW

Abstract: The industrial applications of high-power fibre optic lasers include welding, 2D and 3D cutting, remote cutting and welding, brazing and surface treatments. The availability of fibre optic lasers with power outputs in excess of 10 kW might allow the development of novel fields of application in the welding of high thickness pieces: shipbuilding and offshore industries, pipe and cable manufacture and other heavy industry sectors. Carrying the beam by fibre optics allows high flexibility, even for the production of very large pieces, such as in the shipbuilding sector. This study describes the laser welding of high thickness pieces using a 30 kW laser and a 200 μm diameter fibre. On the one hand, such lasers allow a weld penetration depth of over 30 mm in a single pass, and very high process speeds for thinner materials on the other. Combining lasers with conventional arc welding techniques (hybrid welding) allows further optimization of weld quality and makes it possible to weld butt joints with a ‘gap’ of...

Thick steel plate buried arc welding method for high-strength bridge

Abstract: The invention relates to a submerged arc welding butt welding technique for high intensity bridge steels, which is used for solving problems at present that in the submerged arc welding butt welding of making large span bridge structures by the bridge steels with low alloy and high intensity, the bridge steels need to be heat treated and back-gouged after being welded. The measure is as following: the method of the invention includes that the bridge steels with the tensile strength of 570MPa to 650MPa and the thickness of 36 to 60mm are used; the matched welding material meet the requirementsthat the tensile strength of welding wires is 600MPa, the diameter Phi of the welding wires is 5.0mm, the welding flux is SJ105Q; a submerged arc welding groove adopts a double-sided V shape asymmetrical groove, the groove angle is 60 degrees, the blunted edge is 6mm; the flame before the welding is preheated to 80 DEG C to 100 DEG C; the welding parameter includes that the welding current is 680A to 700A, the welding voltage is 29V to 30V, the welding speed is 22m/h to 23m/h, the welding line energy is 32kJ/cm to 35kJ/cm, the baking system of the welding flux is 350 DEG C multiplied by 1h; the submerged arc welding adopts the multi-layer and multi-channel continuous welding, and the interlayer temperature is controlled to be 100 DEG C to 160 DEG C. The submerged arc welding butt welding technique for the high intensity bridge steels is simple in procedure and low in energy consumption without the heat treating and the back gouging after being welded.

Full-Scale Tests of Butt-Welded Splices in Heavy-Rolled Steel Sections Subjected to Primary Tensile Stresses

Abstract: Experimental results from full-scale testing of full and partial penetration butt-welded splices of ASTM A6 Group 4 and 5 heavy-rolled sections are presented. Welded splices of the test specimens were subjected to primary tensile stresses as induced by pure bending. The partial penetration splice failed in a brittle manner with no apparent ductility. However, it was able to develop and exceed its nominal capacity. Qualitative explanations are given as to the cause of the observed failure. The splice with full penetration welds exhibited satisfactory strength and ductility. It is believed that a great amount of care must be taken in the execution of this weld type. Future research needs are examined.

Method for assembling the terminal portion of a motor vehicle wheel axle support-member, and the terminal portion produced by this method

Abstract: The method enables certain components such as two half-shells (3), a hub (5) and flange (7) to be assembled for the purpose of forming a wheel axle terminal (1) and consists essentially of the following operations in succession: - positioning one of the half-shells (3) on the other so that their respective edges (11 and 13) and respective semicylindrical end portions (12) mate in order to form a cylindrical seat (4); - welding said half-shells (3) together along edges (11 and 13); - inserting said hub (5) into the cylindrical seat (4) and welding the axial ends of this latter to the seat (4) by circumferential butt welds; - positioning the flange (7) on an end portion (6) of the hub (5) which emerges from the seat (4), and welding the axial end of said portion (6) circumferentially by a butt weld to the flange (7).