Current high-energy beam welding are major areas of concern are: ① the large-scale high-energy beam equipment - large-scale power and can process parts (even parts integration) of the large-scale. ② the development of new equipment, such as the pulse work and short-wavelength lasers. ③ processing equipment, intelligent and flexible. ④ beam to improve the quality and diagnosis. ⑤ beam, the workpiece, the interaction mechanism of the process medium. ⑥ composite beam. ⑦ new welding. ⑧ applications expand.

The latest developments in laser welding

A new type of laser
(1) strip-type DC (DC Slab) CO2 laser, (2) diode-pumped YAG laser, (3) CO laser, (4) Semiconductor lasers, (5) excimer lasers.

2 large-scale laser power, beam quality and pulse mode
PRC's case to the United States a few years ago, the CO2 laser for cutting the main power is 1500 ~ 2000W, and the recent leading product is 4000 ~ 6000W, 6000W stainless steel can be cut thick, steel thickness of 35mm and 40mm.

3 equipment, intelligent and flexible processing
Especially for the YAG laser, optical fiber transmission as available, to the process brought great convenience.
Its main features are: ① a machine. ② using a laser machine can be multi-bit (up to 6) processing. ③ fiber length up to 60m. ④ open the control interface. ⑤ with remote diagnostic capabilities.

4 composite beam
The main laser - arc complex. Deep penetration Welding Electrode, plasma is produced above the pool, composite processing, laser-produced plasma is conducive to the stability of the arc; complex processing to increase processing efficiency; can improve poor welding materials such as aluminum, dual-phase steel welding sex; increase the stability and reliability of welding; Typically, laser welding is very sensitive Holes, combined with the arc, then becomes easy and reliable.
Laser - laser and arc complex is mainly TIG, Plasma and GMA. Through the interaction of laser and arc, each method can overcome its own deficiencies and, thus, a good composite effect.
GMA low cost, the use of filler wire, applicability, drawback is that the depth of melting, welding speed is low, the workpiece to withstand large heat loads. Laser welding to form deep and narrow weld, high welding speed, heat input is low, but high investment, high precision preparation of the workpiece, for aluminum and other materials, poor adaptability. Laser-GMA composite effect in: arc added to the bridging of the gap, for two reasons: First, the filler wire, the second is a wider range of arc heating; arc power decide the width of the weld at the top; laser-produced plasma body reduces the arc ignition and maintenance of resistance to a more stable arc; laser power determines the weld depth;
From the energy point of view, laser arc hybrid welding efficiency is very significant. This is mainly based on two effects, first, a high energy density resulted in higher welding speed; Second, the combined effects of interaction between two heat sources.
GMA, Laser Holes and laser arc hybrid Aluminium Welding Electrode line of three methods of energy, and energy efficiency of the weld cross-section comparison.