Engineering

Heavy engineering industry has highly diverse production tasks. For example, it includes the production of wind towers, beams and earthmoving equipment. However, despite of such a great variety of tasks, in all these cases, the welding has some common features:
- High efficiency due to the higher deposition rate;
- High efficiency due to lower volume of marriage and finishing works (e.g. grinding);
- Careful control of welding parameters.

Wide range of heavy engineering products and brands of raw materials and their thickness requires the use of many types of welding, such as welding in carbon dioxide, submerged, electroslag, manual arc, a point contact. In the field of heavy engineering processes dominate submerged arc welding, flux-cored wire and shielding gas.

Despite of high level of mechanization of welding in manufacturing of welded structures in heavy engineering, manually performed ~ 40% of the welding operations. In manual arc welding all snatching of parts in the assembly are performed. This type of welding is general; it allows connecting the parts in all positions and virtually of any thickness.

In the industry the semiautomatic welding in carbon dioxide mostly used, the amount of which is increased mainly due to replacing on account of manual arc welding and semi-automatic welding. It comes because of great versatility to perform semi-automatic welding in carbon dioxide in almost all available for manual arc welding areas with higher productivity and better working conditions.

Cored wire welding is increasingly being used in heavy engineering. Wire of complex structures, as well as dual-layer was used without additional protection.

Automatic submerged arc welding, that widely used in factories with heavy engineering process is characterized by stability, high quality welds, high performance, low consumption of electrode metal and electricity and good working conditions. Spatter absence is a major advantage of submerged arc welding, since there is no need for cleanup operations. Education of welder also requires less time than for manual welding. Automatic submerged arc welding is used for circumferential and longitudinal seams.

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