Novel welding process for combining submerged-arc welding with CO2 gas shielded welding

Abstract

The invention discloses a novel welding process for combining submerged-arc welding with CO2 gas shielded welding. A welding power supply, a control box and a welding tractor of submerged-arc welding are adopted, a welding gun of CO2 gas shielded welding is arranged on the welding tractor, but CO2 gas is not used; and by using a welding wire of the gas shielded welding and a welding flux of the submerged-arc welding, a backing welding layer and a cosmetic welding layer of a working seam are welded through a wire feeding mechanism and the welding gun of the CO2 gas shielded welding. The invention improves the comprehensive mechanical property of the whole seam, ensures that the surface of the seam is formed smoothly and attractively, is beneficial to appearance detection, has improved welding process parameters compared with other welding methods, and can ensure effective weld penetration, low cost and high production efficiency.

Description

technical field [0001] The present invention relates to a kind of submerged arc welding and CO 2 A new welding process combined with gas shielded welding. Background technique [0002] Submerged arc welding is a welding method in which an arc burns under a flux layer. The main equipment used is welding power supply, control box, and welding trolley; the steps are as follows: first clean the weldment, then install welding wire, then install flux, then adjust the welding power supply and speed, and then weld after surfacing. The advantages of submerged arc welding are: high productivity; high welding quality; saving welding materials and energy; good working conditions. Its disadvantages are: it is mainly used for flat welding position welding and long weld welding. [0003] CO 2 Gas shielded welding uses carbon dioxide (CO 2 ) as the shielding gas metal arc welding. It is a semi-automatic welding process, the main equipment adopts welding power supply, control box, gas ...

AI Technical Summary

Problems solved by technology

It is a semi-automatic welding process, the main equipment adopts welding power supply, control box, gas supply system, wire feeding mechanism, welding torch; CO 2 Welding is one of the important fusion welding methods for welding ferrous metal materials at present. It has low cost, good quality and high production efficiency. Its disadvantages are large power supply and unattractive shape.