A fiber-guided weak laser coaxial composite welding torch

Abstract

The invention discloses an optical-fiber-guiding weak-laser coaxial composite welding gun, and relates to the field of laser-TIG composite welding guns. The optical-fiber-guiding weak-laser coaxial composite welding gun aims at solving the problems that in traditional single-welding-wire and single-heat-source welding, weld joints are wide, welding deformation is big, the welding speed is low, and the fusion depth is small. An electric arc is directly generated through induction of laser, a tungsten electrode is manufactured by being divided into multiple segments, an optical fiber is arranged in the tungsten electrode, and the laser is introduced into the tungsten electrode through the optical fiber and focused through a collecting lens; the length of the tungsten electrode and the length of the optical fiber are regulated through a tungsten electrode length regulator and an optical fiber regulator, the exterior of the optical fiber is provided with a silicon dioxide heat insulation coating, and a spiral cooling water channel is lathed on an inner sleeve of the composite welding gun. According to the optical-fiber-guiding weak-laser coaxial composite welding gun, the theory that low-energy laser assists electric arc welding is utilized, the laser-TIG coaxial composite design is adopted, the structure is simple and practical, not only can the basic requirements of a common welding gun be met, but also the high-precision welding electric arc very easy to ignite can be obtained, the welding production efficiency is improved, and the production and maintenance cost is lower.

Description

technical field [0001] The invention relates to the field of application technology of a weak laser-TIG composite welding torch, in particular to an optical fiber guided weak laser coaxial composite welding torch. Background technique [0002] At present, with the rapid development of the manufacturing industry, higher requirements are placed on welding efficiency, which requires a further increase in welding speed on the premise of ensuring welding quality. Different from traditional single heat source welding, compound heat source welding technology is getting more and more attention. Laser-arc hybrid welding is one of the most commonly used compound heat source welding technologies. Compared with single arc welding, laser-arc hybrid welding has relatively concentrated heat input, narrow weld seam, narrow heat-affected zone, small welding deformation, high welding speed, and large penetration depth; compared with pure laser welding, laser-arc welding Arc hybrid welding in...

AI Technical Summary

Problems solved by technology

At present, most of the laser-arc hybrid welding at home and abroad use high-power lasers (above 1kW) and TIG / MIG arcs as the main heat source. The side-axis composite method cannot realize the coaxial composite method in which the laser is placed in the center of the arc.

[0003] At present, there are no research reports on low-energy laser-assisted TIG arc starting / welding technology and fiber-guided weak laser-TIG coaxial hybrid welding technology and equipment

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