Identify the laser welding process is the manner

 Identify the laser welding process is the manner in which Stable deep penetration process, plasma, PS, PCS signals are very strong; stable thermal conductivity welding process does not produce the plasma, PS, PCS signal is almost zero; mode instability welding process, the plasma generated intermittently and disappear corresponding to the PS, the PCS signal intermittently rise and fall. Diagnosis transferred to the welding area of the laser power is normal. Certain other parameters, the strength of the PS and PCS signals incident to the power corresponding to the size of the welding zone. Monitor PS and PCS signals can be optical system, the power of the welding zone fluctuations.Deep penetration laser welding is generally a continuous laser beam to complete the connection of the material, metallurgical physical processes of electron beam welding is very similar to the energy conversion mechanism is accomplished through the "holes" (Key-hole) structure. In a sufficiently high power density laser irradiation, the material evaporation and the formation of holes. The hole full of steam like a blackbody, including nearly all of the incident beam energy, the hole cavity equilibrium temperature of 25 0C, and the heat from high temperature hole cavity outer wall to pass out, so that the molten metal around the hole cavity surrounded. Remote control technology is adopted for green laser pointer .
Holes filled with wall material in the beam by the continuous evaporation produced high-temperature steam, and small hole walls surrounded by molten metal, liquid metal is surrounded by solid material (and in most of the conventional welding process and laser conduction welding, the energy is first deposited in workpiece surface, and then transported to rely on passing internal). Hole wall outside the liquid flow and parietal surface tension and hole cavity continuous steam pressure stalemate and maintain homeostasis. Beam continuously into the holes, holes outside of the material in a continuous flow, with the beam move the holes is always in the flow of steady-state. That is, the holes and around the hole wall of the molten metal to move forward with the leading beam forward speed, the molten metal filling the void left by the holes away and followed by condensation, so the formation of weld. There is no need for green laser pointer to install any drive.
The above process all of this happened so fast, so that the welding speed can easily reach several meters per minute.