There are two welding methods for gas welding. One is fusion welding, that is, fusion welding of parent material (iron wire) and welding wire (iron wire). The other is brazing, in which the parent metal (iron wire) does not melt, and the welding wire (usually brass welding wire) melts and welds the workpiece. These two methods are not suitable for welding the artwork in the drawing, because the coil has internal stress, and when the solder joint is burned by flame, the line of the solder joint will soften and protrude outward, and the post-welding molding is very troublesome.

If this handicraft is made of steel bars with a diameter of more than 5 mm, it can be welded by ordinary arc welding.

Look at the picture, I feel that this handicraft is not big. It can be welded with an electric soldering iron. Tin welding is also welding, but low temperature welding. Welding with solder is inefficient and costly.

The best choice for welding this handicraft is resistance welding, which has high efficiency and low cost. But the equipment is more expensive. /question/368005889059887004 . html？ oldq= 1

To sum up, the most economical and efficient welding method is argon arc welding, which is very suitable for welding small and light workpieces.