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.