Method for single-side welding of thick plate for ship
A single-sided welding, thick plate technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of complex coupling between laser and arc, large number of control parameters, complex process control, etc., so as to facilitate popularization and utilization , Improving the performance of the weld seam, and the effect of simple construction technology
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Embodiment 1
[0026] The invention provides a new method for laser-GMAW composite welding of thick plates and double-wire GMAW cover single-sided welding, comprising the following steps:
[0027] a) Welding equipment: Trumpf TruDisk 16002 is preferred for the laser, Fronius TPS 5000 is preferred for the welder, and ABB IRB 2400 (ABB robot) is preferred for the robot; c) Preparation before welding: use an angle grinder to mechanically remove paint, rust, scale and other substances harmful to the welding process at 20 mm near the welding site; then use a stainless steel wire brush of about 0.2 mm to remove burrs and inclusions ;Finally, wipe with acetone to remove the surface oil stain; d) Select the ER50-6 welding wire with a diameter of φ=1.2mm. The protective gas adopts a volume fraction of Ar+20%CO 2 ; f) First, fix the beginning and end of the steel plate by spot welding, and then weld them all; secondly, use the laser-GMAW hybrid welding method for the first pass welding, fix the GMAW ...
Embodiment 2
[0033] A method for one-sided welding of ship thick plates according to the present invention, the specific method comprises the following steps:
[0034] Step 1. Grinding and wiping with acetone before welding the thick plate to be welded without groove (Type I groove);
[0035] Step 2. Place the two weldments on the welding workbench, and adjust the positions of the two weldments so that the gap between the two weldments is 0.8mm;
[0036] Step 3. Using the laser-guided arc welding mode, the first laser-GMAW composite welding is performed on the 20mm thick AH36 steel to form the first weld 3;
[0037] Step 4. Clean up the residue in the first welding seam, and wipe the welding seam with acetone, and wait for the test plate to cool down to below 60°C before performing the second welding;
[0038] Step 5. The two GMAW welding torches start arcing at the same time, and the two GMAW welding torches simultaneously perform the second cover welding along the same direction to form...
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