Laser Deep Penetration:
1, the metallurgical process and technology theory. Physical metallurgy of laser deep penetration electron beam welding process is very similar to that of the energy conversion mechanism is through the "hole" structure to complete. At a sufficiently high power density beam irradiation, the material produces the formation of small holes evaporate. The hole is full of steam like a bold, almost all the energy of incident light absorbed, the hole cavity equilibrium temperature of 25,000 degrees. Heat from the outer wall of the chamber to pass out hot holes, so that the hole cavity surrounded by a metal melt. Filled holes in the beam by continuous evaporation of wall material produced by high temperature steam, small holes surrounded by four walls of molten metal, liquid metal that is around four weeks of solid materials. Outside the cell wall and the parietal surface tension of liquid flow and pore pressure of the steam produced by successive cavity locked in a stalemate and maintain homeostasis. Beam continuously into the holes, small holes in a continuous flow of foreign material, with the beam moves, the flow of holes is always in steady state. That is, holes, and the molten metal around the hole wall with the forward speed of the beam leading to move forward, remove the molten metal filling the hole left by the gap and subsequently condensed, thus forming the weld.
2 factors. Impact of laser deep penetration of factors, including: laser power, laser beam diameter, material absorption rate, Welding Electrode, shielding gas, lens focal length, focus position, laser beam position, welding start and end points of the laser power gradually rise , gradually decreased control.
3, laser deep penetration characteristics:
Features: (1) high aspect ratio. Because the molten metal around the cylindrical chamber to form steam and extends to the workpiece, the weld becomes deep and narrow. (2) The minimum heat input. Because the source chamber temperature is high, the melting process happened so fast, low heat input the workpiece, heat distortion and heat affected zone is very small. (3) high density. Because they are full steam in the weld pool small Kong Youli mixing and gas escape, leading to generation without pores penetration welding. High cooling rate after welding so that weld metal is also easily miniaturization. (4) strong weld. (5) precise control. (6) non-contact, air welding process.

4, laser deep penetration of the advantages: (1) As the focused laser beam than the conventional method has a much higher power density, resulting in welding speed, heat-affected zone and deformation are small, you can weld titanium, quartz and other difficult to weld material. (2) is easy because the beam transmission and control, and does not require frequent replacement torch, nozzle, significantly reducing downtime auxiliary time, so there is load factor and efficiency are high. (3) the role of the purification and high cooling rate, weld strength, integrated and high performance. (4) The balance of low heat input, high precision, can reduce reprocessing costs. In addition, the laser welding is relatively low fixed transfer costs, reduce production costs. (5) easy to automate, and fine positioning of the beam intensity can be effectively controlled.

5, laser deep welding equipment: laser penetration welding is usually used continuous wave CO2 laser, these lasers can maintain a sufficiently high output power, have a "hole" effect, penetration section of the workpiece to form a tough welded joints. On the laser itself, it is only to produce can be used as a heat source, a good parallel to the beam direction device. If it is oriented and effective treatment of the workpiece after the shooting, the input power to a strong compatibility, so that it can better adapt to the automation process. For effective implementation of the welding, lasers and other necessary optical, mechanical and control components together to form a large welding system. The system consists of laser, beam delivery components, parts handling and mobile devices, as well as control devices. The system can be only manually by the operator simply moving and fixed parts, the workpiece can also include automatic loading, unloading, fixed, Copper Welding Electrode, inspection. Design and implementation of this system is to be satisfied with the general requirements of the welding quality and high productivity.