Pulse negative pressure laser enhanced-type lock hole TIG welding device

Abstract

The invention belongs to the technical field of welding devices and discloses a pulse negative pressure laser enhanced-type lock hole TIG welding device. The pulse negative pressure laser enhanced-type lock hole TIG welding device comprises a hollow tungsten electrode, a tungsten electrode clamp, a vacuum negative pressure pipe, an insulation air pipe, a laser, a laser fixing frame, high transmittance glass, a welding gun outer body, an electric conductor, a lantern ring, a transferring rod, a transferring head, an electric conducting rod insulation sleeve, an air transferring head, a vacuum negative pressure connector, an upper insulator, a lower insulator, an air hood, an upper nut, a lower end nut, a locking nut, a pulse solenoid valve, a vacuum negative pressure meter, a pressure storage tank and an air pump. According to the technical scheme, stability of the welding process is ensured, the lock hole TIG welding quality is improved so that the weld joint shape is more reasonable,and the welding process is more stable; meanwhile the electric arc shape is effectively restrained, the weld joint heat-affected zone is reduced, and the electric arc penetrating power is reinforced;an electric arc generates the oscillation effect, the weld joint structure is refined; and the laser reinforcing effect is matched, the weld joint depth-to-width ratio is optimized, weld joint formingis more aesthetic, and promotion and optimization of the weld joint quality and the welding efficiency are achieved.

Description

technical field [0001] The patent of the present invention relates to the technical field of welding equipment, in particular to a pulsating negative pressure laser-enhanced keyhole TIG welding device. Background technique [0002] Keyhole TIG (K-TIG) welding technology is a high-speed single-pass full-penetration weld seam welding technology developed by the Australian Government's Commonwealth Scientific and Industrial Research Organization (CSIRO). Compared with traditional TIG welding, the welding torch structure is Adjustment to achieve high-speed cooling of the tungsten electrode, so that the arc energy and arc pressure are significantly increased, and at the same time, a highly stable, self-correcting full-penetration welding hole can be formed during the welding process, forming a perforation similar to the perforation-type plasma arc Type welding, to achieve high-quality welding of thick parts. Generally, materials with a thickness below 16mm (such as ferritic stai...

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Problems solved by technology

However, laser welding also has disadvantages such as unstable welding quality, high laser reflectivity of materials, and poor joint performance.

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