Magnetic field assisted multistage argon arc and laser center coupling common molten pool welding device

Abstract

The invention belongs to the technical field of welding, and particularly relates to a magnetic field assisted multistage argon arc and laser center coupling common molten pool welding device. The device comprises a laser generator, a laser welding head, a laser optical fiber, GTAW welding power sources, GTAW welding torches, a protective gas hood, a magnetic control power source and magnetic control devices. According to the device, the three identical GTAW welding torches provided with the independent welding power sources are evenly distributed around the laser welding head at the included angle of 120 degrees, and center common molten pool coupling welding is achieved. Coaxial coupling of laser and GTAW electric arcs is achieved, the center common molten pool coupling welding technology is formed, the welding space is saved, on the basis that the stability of the electric arcs is guaranteed, the welding penetration is increased, one-time single-face welding double-face forming of a medium-thickness plate is achieved, the welding efficiency is remarkably improved, and the space induction effect of the laser and electric arc plasma is promoted.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a magnetic field-assisted multi-stage argon arc and laser center coupling eutectic pool welding device. Background technique [0002] High-efficiency and high-quality welding technology has always been advocated in the field of welding at home and abroad. Composite welding technology integrates two or more welding technologies together to learn from each other. Compared with a single welding method, it can significantly increase welding efficiency and improve the quality of welded joints. Laser welding technology uses the laser beam as the energy source to make the impact on the weldment joint to realize the connection. It has the characteristics of fast welding speed, small heat input and narrow heat-affected zone. It is widely used in automobiles, aerospace and marine engineering, etc. field. However, the cost of a single high-power laser is relatively high. In order to redu...

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Problems solved by technology

[0003] Up to now, laser arc hybrid welding is mainly integrated mechanically at a certain angle through an independent welding laser head and welding torch. The laser is in the front keyhole, and the arc is in the rear to fill the cover. Although it can better realize the metal connection, it takes up space. larger

In addition, the high-temperature plasma generated above the workpiece during the welding process will have a shielding effect on the laser, resulting in the inability of the small holes to continue to exist stably, resulting in the collapse and solidification of the liquid metal, resulting in defects such as pores and spatter in the welded joint, and the welding quality cannot be guaranteed.

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