Back-gouging-free welding method for H-shaped steel
A welding method and H-beam technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve problems such as poor forming quality of bottoming welds, achieve good forming effect, uniform force forming, and avoid threading and burning through Effect
Pending Publication Date: 2021-07-30
CHINA CONSTR STEEL STRUCTURE TIANJIN CO LTD
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Problems solved by technology
[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor bottoming weld forming quality in the process of full penetration combined weld of H-shaped steel in the prior art, thereby providing an unclear root welding method for H-shaped steel
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[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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Abstract
The invention provides a back-gouging-free welding method for H-shaped steel. The back-gouging-free welding method comprises the following steps that grooves are formed in the front side and the back side of a web welding end; a web plate and a flange plate are assembled, and an assembling gap is reserved; aluminum-foil paper is pasted between the back side of the web plate and the top side of the flange plate to form a welding flux containing groove, and the welding flux containing groove is filled with welding flux; backing welding is conducted on the assembling gap in a submerged-arc welding manner, and a backing welding seam is formed; when the backing welding seam is formed, the welding flux in the welding flux containing groove is heated, and a composite liner is formed; submerged-arc welding is performed on a front-side welding bead to form a front-side welding seam; and after the composite liner is removed, submerged-arc welding is conducted on a back-side welding bead, and a back-side welding seam is formed. According to the back-gouging-free welding method, no truncated edge exists between the grooves in the front side and the back side of the web plate welding end, and the assembling gap is reserved between the web plate and the flange plate, so that the joint of the web plate welding end can be completely fused during backing welding, and back gouging treatment is not needed; and the composite liner formed by heating the welding flux plays a role in supporting the backing welding seam.
Description
technical field [0001] The invention relates to the technical field of steel structure construction, in particular to a root-clearing welding method for H-shaped steel. Background technique [0002] With the large scale and high parameters of welded structures, steel structures or steel mixed structure buildings have become an important development direction in the field of construction engineering. The second half and ultra-thick plate welding combined welds are more and more widely used in steel structures. The performance requirements of welded joints are also getting higher and higher. [0003] H-beam full-penetration composite welds are usually grounded first, front welded and back welded; during grounding welding, the backing metal pad or backing ceramic pad is used to support the bottoming weld; during the welding process, the bottoming The high temperature at the weld may lead to changes in the surface porosity of the backing metal pad or backing ceramic, resulting ...
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IPC IPC(8): B23K9/18B23K9/235B23K9/32
CPCB23K9/18B23K9/235B23K9/32
Inventor 李毅吴洪涛邓秀岩牛群汪天平李朋朋
Owner CHINA CONSTR STEEL STRUCTURE TIANJIN CO LTD