Welding method for large-curvature thick plate box type rotary steel ladder box body

Abstract

The invention provides a welding method for a large-curvature thick plate box type rotary steel ladder box body. The welding method is characterized in that the rotary steel ladder box body comprisesa cover plate, a bottom plate, an inner side plate and an outer side plate which are formed in a pressed mode according to the sizes of a design drawing; a plurality of separating plates are arrangedbetween the inner side plate and the outer side plate; and anti-deformation supports are arranged between the separating plates and the inner and outer side plates as well as between the separating plates. According to the welding method, through the measures of setting of grooves of assembled steel plates, supporting and reinforcement before welding, reasonable arrangement of the welding joint welding sequence, adoption of symmetrical welding and the like, the problems of large deformation, difficult control and the like prone to occurring during welding of thick plates are reduced, deformation correction in the later period is reduced, and therefore the purpose of lowing manufacturing cost is realized. By means of the welding method, the welding difficulty can be lowered, turning over isnot needed during component welding, a welding joint can be formed at a time, the thermal contraction deformation is small, and the accuracy and quality of manufacturing of a rotary steel ladder areimproved.

Description

technical field [0001] The invention belongs to the technical field of welding technology, and in particular relates to a welding method for a large-curvature thick plate box-type rotary steel ladder box. Background technique [0002] With the widespread application of steel structures in China, architectural modeling puts forward higher requirements for the manufacture of steel structures, especially in large public service places, where steel structure spiral stairs are often encountered. Compared with cast-in-place concrete, the steel structure spiral ladder has the characteristics of light structure, beautiful appearance and environmental protection. The rotary ladder targeted by this patent has a three-dimensional space structure of spiral blades. The section of the rotary steel ladder is a unequal trapezoid, and the overall box structure is not only difficult to control its shape and size during production, but also has a large amount of welds inside the box. It is di...

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Problems solved by technology

The rotary ladder targeted by this patent has a three-dimensional space structure of spiral blades. The section of the rotary steel ladder is a unequal trapezoid, and the overall box structure is not only difficult to control its shape and size during production, but also has a large amount of welds inside the box. It is difficult to weld the position of the internal partition and the bottom plate weld, the internal partition and the panel weld cannot be welded, the spatial position of the side plate and the bottom panel is complicated, and it is difficult to control the influence of welding heat shrinkage on the special-shaped components. Therefore, It is necessary to formulate a reasonable welding method to ensure the manufacturing accuracy and quality of the rotary steel ladder

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