Rotary drum submerged-arc welding device and welding method

Abstract

The invention provides a drum submerged arc welding device and a welding method.The drum submerged arc welding device comprises a supporting and assembling assembly, a power drive rotating assembly, a counterweight balance assembly, a welding operation assembly, an internal positioning assembly, an external positioning assembly and a welding preheating assembly, and according to the drum submerged arc welding device, a submerged arc welding machine is adopted to replace manual gas metal arc welding; a counterweight plate is arranged on a bottom plate lug plate, the bottom plate lug plate is used for counterweight balance, so that the cylinder and the bottom plate lug plate rotate stably, a positioning guide rail is arranged on the inner wall of the cylinder, a submerged arc welding machine is positioned during internal welding, a positioning bracket is arranged outside the cylinder, and the submerged arc welding machine is positioned during external welding; direction deviation is avoided, the welding precision is improved, and the welding efficiency is improved.

Description

technical field [0001] The invention relates to welding equipment, in particular to a drum submerged arc welding device and a welding method. Background technique [0002] In the welding process of a cylindrical workpiece, the conventional welding method is manual gas shielded arc welding operation, such as figure 1 shown. The inner diameter of the cylinder is 1230mm, the wall thickness is 70mm, the material is S355ML, the thickness of the lug plate of the cylinder bottom plate is 70mm, the inner diameter of the round hole of the lug plate of the cylinder bottom plate is 1000mm, and the weight is about 1 ton. The cylinder and the lug plate of the bottom plate require full melting Through welding, double groove inside and outside the cylinder. When welding, the inner ring is welded first, and the welder needs to drill into the cylinder for welding. The inner diameter is only 1230mm, and the space is narrow. At the same time, the outside needs to be heated by an electric hea...

AI Technical Summary

Problems solved by technology

When welding, the inner ring is welded first, and the welder needs to drill into the cylinder for welding. The inner diameter is only 1230mm, and the space is narrow. At the same time, the outside needs to be heated by an electric heating plate. The heating temperature is above 110°C, and the temperature in the space inside the cylinder is very high. High, difficult welding, low welding efficiency, low welding pass rate

After the inner ring is welded, the outer ring needs to be cleaned and welded. When the cylinder is welded to the outer ring of the lug plate of the bottom plate, the welder should weld in a kneeling or lying position. The preheating temperature is above 110°C, the temperature is high, the welding efficiency is low, and the welding pass rate is low

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