Beam combination by a single electron, photon, electron, ion or two or more kinds of particles. The heat source belonging to the high power density: plasma arc, electron beam, laser beam, laser beam and the composite heat source + Arc (TIG, MIG, Plasma).

    This high-energy beam welding the main areas of concern are: (1) high-energy beam size of the facility - the power of large, and processability parts (even parts integration) the large-scale. â‘¡ the development of new equipment, such as pulse work, and short-wavelength lasers. â‘¢ equipment intelligent and flexible processing. â‘£ improve the beam quality and diagnosis. ⑤ beam, the workpiece, the study of the mechanism of interaction between the process media. â‘¥ composite beam. ⑦ theWelding Electrodeof the new material. ⑧ the expansion of application fields.

    1, the latest progress of laser welding

    1.1 new laser

    (1) DC the slat (DCSlab) CO2 laser, (2) the diode-pumped YAG laser, (3) CO 2 laser, (4) a semiconductor laser (5) of the excimer laser.

    1.2 laser power of large-scale, pulse and high beam quality mode

    United States PRC, for example, a few years ago, the CO2 laser power for cutting 1500 ~ 2000W, 4000 ~ 6000W leading products in recent 6000W can cut the thickness of the stainless steel, carbon steel thickness of 35mm and 40 mm, respectively.

    1.3 Equipment intelligent and flexible processing

    YAG laser available optical fiber transmission to the processing of a great deal of convenience.

    Its main features are: â‘  The use of a machine. â‘¡ using a laser machine can be a multi-position (up to 6) processing. â‘¢ fiber length up to 60m. â‘£ open the control interface. ⑤ remote diagnosis. The 1.4 beam the composite

    The most important is the laser - Arc composite. Deep penetration welding, the plasma is generated above the bath, the composite processing, the laser produced plasma is conducive to the stability of the arc; composite processing can improve the processing efficiency; poor welding of welding of materials such as aluminum alloy, dual phase steel can be improved ; increase welding stability and reliability; usually, laser Jiasi, welding is very sensitive, by a composite with the arc, the change easily and reliably.

    Laser - arc hybrid laser and TIG, Plasma, and GMA through the interaction of laser and arc, to overcome the deficiencies of each method, and produce a good composite effect.

    GMA low cost, using the filler wire, applicability, the disadvantage is melting shades, Mig Welding Electrode, workpiece withstand thermal loads. Laser welding can form deep and narrow welds, welding speed, low heat input, but high investment, high accuracy requirements of workpiece preparation, poor adaptability of materials such as aluminum. Laser-GMA composite effect: the arc increase the bridging of the gap, for two reasons: First, the filler wire, a wide range of electric arc heating; arc the power decided weld top width; laser produced plasma Less small arc ignition and maintenance of resistance, so that the arc is more stable; laser power determines the depth of the weld; Furthermore, composite led to increased efficiency and welding adaptive enhancement.

    From the energy point of view, laser arc hybrid welding efficiency improve very significantly. This is mainly based on two effects, the first high energy density results in a higher welding speed; second superposition effect of the two heat sources interaction.