1. It depends on the specific welding specifications. For example, for submerged arc welding, SAW Welding, the welding wire is 4.0. In general, the welding speed is 350-500mm/min, that is, 35-50cm/min.

2. Automatic welding machine is based on motor control technology, single-chip control technology, PLC control technology and numerical control technology. 

The automatic welding machine is mainly composed of automatic loading and unloading mechanism, automatic workpiece station conversion mechanism, automatic clamping mechanism,

 and workpiece welding process automation system, system integration control, etc.