The most common arc welding machine should not work at home, because the current required for arc welding is less than tens of amps, and your protector will jump, so TIG, MIG, MAG can be excluded. Resistance welding and thermocompression welding are too large for home use. The disadvantage of oxyacetylene gas welding is that the flame temperature is 3000+. If you are not careful, your home will be set on fire. The most reliable way to weld at home is brazing. Brazing requires high-frequency heating, and soft brazing is more suitable. However, you also need to consider what you are soldering, because the metal bonding strength is not high with this way. Laser welding, plasma welding, and electron beam welding are a bit expensive, but they can be used at home, and the welding quality is good and the speed is fast.