Magnetically-controlled plasma welding method and welding device

Abstract

The invention discloses a magnetically-controlled plasma welding method and a welding device. According to the magnetically-controlled plasma welding method, adding of a longitudinal magnetic field along the direction of a welding gun between the welding gun and a workpiece welded is adopted. Under restraint of a longitudinal magnetic field, the drastic contracting effect is produced by electric arcs. The electric field intensity of the electric arcs is strengthened conspicuously, and thus the electric arcs have strong longitudinal penetrating power. Therefore, by adding the longitudinal magnetic field between the welding gun and the workpiece welded, a high-thickness plate or other special metal materials which are difficult to weld can be welded easily; and moreover, under the action ofelectrified coil current, the workpiece welded also has function of preheating before welding and heat treatment after welding, and the welding joint molding quality is improved obviously.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a magnetron plasma welding method and a welding device. Background technique [0002] With the rapid development of power electronics technology, welding technology is also changing with each passing day. However, in the field of welding, there have always been several technical problems that have not been solved or made any progress for decades. One of them is magnetron plasma welding technology, which has a welding effect that cannot be achieved by other welding methods for welding ultra-thick steel plates or other metal materials, as well as welding various high thermal conductivity metals including copper plates. At the same time, this technology has a very significant effect on improving the quality of welds and improving welding efficiency. [0003] In order to solve this problem, experts and scholars at home and abroad have exhausted various methods, but everyone has fa...

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Problems solved by technology

[0003] In order to solve this problem, experts and scholars at home and abroad have exhausted various methods, but everyone has fallen into a fixed thinking mode invisibly: to make the plasma energy highly concentrated and have the characteristics of strong longitudinal motion kinetic energy, a strong plasma must be generated. Longitudinal magnetic field, and in order to generate a strong magnetic field, it is necessary to add a magnetic material with high permeability to the energized coil

However, after adding the magnetic material, most of the magnetic field of the energized coil is confined inside the magnetic material, and the magnetic field that is actually used to restrain the plasma moving longitudinally is greatly weakened, and the expected effect cannot be achieved at all.

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