Method of pipeline narrow gap scanning galvanometer laser- hot wire TIG composite welding
A scanning galvanometer and composite welding technology, applied in laser welding equipment, welding equipment, tubular objects, etc., can solve the problems of poor back forming of backing welding, poor fusion between side walls and layers, and reduced assembly accuracy requirements. Reduce welding deformation, reduce assembly accuracy requirements, and improve the effect of back forming
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Embodiment 1
[0018] Taking the all-position butt welding of 316LN stainless steel pipes with a diameter of Φ690mm and a wall thickness of δ70mm as an example, the steps and process of welding implementation are explained in detail.
[0019] (1) Machining the pipe fittings Ⅰ1 and Ⅱ2 to be welded to make a step transition to form a U-shaped narrow gap welding groove;
[0020] (2) Assemble the pipe fittings Ⅰ1 and Ⅱ2 to be welded;
[0021] (3) Remove scale, oil, rust, water and other dirt from the groove and its surroundings before welding;
[0022] (4) The TIG welding torch 3 in the scanning galvanometer laser-hot wire 5TIG composite welding torch uses a φ1.2mm welding wire for backing welding; the laser power is 8kW, the spot diameter is φ0.6mm, and the laser beam 7 can be adjusted on the X axis by adjusting X By adjusting Y, the laser beam can be adjusted on the Y axis; by adjusting Z, the laser beam can be adjusted on the Z axis to realize the laser beam swing, and the laser beam can act...
Embodiment 2
[0025] The 316LN stainless steel pipe with a diameter of Φ350mm and a wall thickness δ of 40mm is butt welded in all positions, and the welding implementation steps and process are explained in detail.
[0026] (1) Machining the pipe fittings Ⅰ1 and Ⅱ2 to be welded to make a step transition to form a U-shaped narrow gap welding groove;
[0027] (2) Assemble the pipe fittings Ⅰ1 and Ⅱ2 to be welded;
[0028] (3) Remove scale, oil, rust, water and other dirt from the groove and its surroundings before welding;
[0029] (4) The TIG welding torch 3 in the scanning galvanometer laser-hot wire 5TIG composite welding torch uses a φ0.8mm welding wire for bottom welding; the laser power is 6kW, the spot diameter is φ0.6mm, and the laser beam 7 can be adjusted on the X axis by adjusting X The adjustment of the laser beam on the Y axis is realized by adjusting Y; the adjustment of the laser beam on the Z axis is realized by adjusting Z to realize the swing of the laser beam, and the las...
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