Submerged-arc welding process of large-size cylinder body

Abstract

The invention relates to a submerged-arc welding process of a large-size cylinder body, comprising the following steps of: firstly laying a standard operation platform at a construction field, erecting a submerged-arc welding bracket and installing an electric rotator on the standard operation platform, and arranging an automatic welding operation platform on the submerged-arc welding bracket; then horizontally placing the cylinder body to be welded on the electric rotator, wherein the electric rotator drives the cylinder body to rotate during rotation; installing a travelable submerged-arc welding trolley at the lower part of an inner ring welding line when the inner ring welding line is welded, wherein the traveling speed of the submerged-arc welding trolley is equal to the rotating speed of the electric rotator, and the submerged-arc welding trolley and the electric rotator are inversed in motion directions so that the submerged-arc welding trolley is positioned on the welding line position of a starting point of the lower part of the cylinder body all the time; and placing the submerged-arc welding trolley on the automatic welding operation platform when an outer ring welding line is welded, wherein the electric rotator drives the cylinder body to rotate, and the submerged-arc welding trolley is in a static state. The invention realizes the purpose of automatic welding through the rotation of the cylinder body and the coordination of the submerged-arc welding trolley, greatly reduces the labor intensity of welders, also enhances the welding efficiency and the welding quality and has very high practical value.

Description

technical field [0001] The invention relates to a welding technology for a large cylinder, in particular to a field manufacturing technology and a submerged arc welding process for a large thin-walled cylinder, and belongs to the technical field of mechanical manufacturing. Background technique [0002] At present, when making large-scale cylindrical equipment, such as evaporative coolers, gas coolers, and large-scale dust removal pipelines for supporting equipment in steelmaking, due to their large volume and heavy weight, they are usually manufactured in the field. After the cylinder is rolled and formed, the assembly and welding must also be carried out in accordance with the GB150 "Steel Pressure Vessel" standard. [0003] At present, when making welding cylinder equipment in the field, the most common way is to use manual arc welding on site, but because the inner surface of the cylinder is not smooth, it is a smooth round wall, so a lot of scaffolding and a lot of safe...

AI Technical Summary

Problems solved by technology

[0003] At present, when making welding cylinder equipment in the field, the most common way is to use manual arc welding on site, but because the inner surface of the cylinder is not smooth, it is a smooth round wall, so a lot of scaffolding and a lot of safety need to be added during welding Measures, the labor intensity of welding workers is very high and the efficiency is very low, so it is difficult to guarantee product quality

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