Electromagnetic control electro-gas welding method and equipment thereof

Abstract

The invention relates to a method of electromagnetic control electro gas arc welding (EMS-EGW), which is that an external magnetic field is arranged at the upper part of an electro gas arc welding (EGW) molten bath (3) or / and nearby the side face, for example, a field power supply provides the exciting coil of exciting current, the time-change or the constant electromagnetic stirring external magnetic field is generated, and electromagnetic stirring action is generated; the electromagnetic field prompts metal fluid in the electro gas arc welding molten bath to move enforcedly, the solidifying process of a weld seam metal is controlled comprehensively, under the coordination of a high speed wire sending forcedly forming system and a circulating cooling forcedly forming system and gaseousprotection, the method of electromagnetic controlled electro gas arc welding (EMS-EGW) is realized to a work piece. The electromagnetic controlled electro gas arc welding (EMS-EGW) device of the invention adds excitation equipment on the prior basis, and the excitation equipment comprises an exciting coil and a field power supply used for providing the exciting current for the exciting coil. The invention breakthroughs the traditional electro gas arc welding method, provides the new conceit of improving the electro gas arc welding; the welding defect is reduced, and the welding cost is reduced, the welding quality and the production efficiency are improved, and the reliability of a product is ensured; the appearance formation is good; the equipment is simple, and the invention is easy to be promoted.

Description

technical field [0001] The invention relates to gas-electric vertical welding (EGW) technology, in particular to an electromagnetically controlled gas-electric vertical welding (EMS-EGW) method and equipment, belonging to the field of welding technology. Background technique [0002] Gas-electric vertical welding (EGW) is a gas metal arc welding method developed from common metal gas metal arc welding and electroslag welding. It is mainly used in the welding of thicker low-carbon steel and medium-carbon steel such as oil tanks, large-diameter thick-walled pipes, and hull plates. It can also be used in the welding of austenitic stainless steel and other metal alloys. The thickness of the plate It is most suitable at 12-80mm. It is one of the efficient welding techniques, which has the advantages of good welding quality, high efficiency, fast deposition speed and low comprehensive cost. Gas-electric vertical welding uses similar to electroslag welding, the water-cooled coppe...

AI Technical Summary

Problems solved by technology

Regarding patents on gas-electric vertical welding technology, for example, the Chinese patent number is 200610200782.9, and the name of the invention is "Inverted Vertical Seam Gas-electric Vertical Welding Method for Large Floating Roof Storage Tanks", which discloses a wall panel that adopts butt-welded parts Carry out pretreatment, use the carbon dioxide gas shielded welding machine to carry out bottom welding on the wall plate, use the gas electric vertical welding machine to carry out the welding method of filling the cover surface on the wall plate after the bottoming, this invention solves the problem of large floating roof The problem that water-cooling pads cannot be installed on the back of the welding seam in the tank inverted construction, but the process is more complicated, which increases the welding cost and welding process; Arc starting welding method without backing" discloses a method of one-time welding forming using a gas-electric vertical welding machine, which mainly includes two processes of arc starting and normal welding, wherein the normal welding is automatically carried out by a gas-electric vertical welding machine; it utilizes The arc starting plate or the circular seam is used as the backing when the arc is started and the welding specification is controlled to improve the welding quality. However, the welding process of this invention is complicated and involves a lot of equipment, which makes it difficult to guarantee the welding quality.

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