Laser-InFocus electric arc double-face symmetric composite welding method

The invention discloses a laser-InFocus electric arc double-face symmetric composite welding method, and relates to welding methods. The method comprises the steps of firstly, machining and grinding or cleaning a workpiece to be welded; secondly, adjusting the position of an InFocus welding gun and the position of a laser head; thirdly, setting welding parameters, wherein the diameter of light spots ranges from 0.1 mm to 0.5 mm, the defocusing amount ranges from -3mm to 3 mm, the laser power ranges from 500 W to 5000 W, the electric arc current of the InFocus welding gun ranges from 50 A to 1000 A, the welding speed ranges from 50 mm/min to 900 mm/min, Ar gas protection is carried out, the gas flow ranges from 10 L/min to 30 L/min, and the InFocus protection gas flow ranges from 10 L/min to 25 L/min; and fourthly, carrying out composite welding. The InFocus welding gun and a TIG welding machine are matched well, a dedicated power source is not needed, the equipment cost is reduced, the welding gun is reliable and durable, the interchangeability of the consumable is good, and due to the design of the InFocus welding gun, mechanization and automation are easily achieved.