Development of laser cutting fabrication processing technology

Foreign laser processing equipment and processes have developed rapidly. Now we have 100kW high-power CO2 lasers, kW-class high beam quality Nd:YAG solid-state lasers, and some can be equipped with optical fibers for multi-station and long-distance work. Laser processing equipment has high power and high degree of automation. CNC control and multi-coordinate linkage have been widely used, and auxiliary systems such as laser power monitoring, auto focus, and industrial TV display are installed.
The minimum aperture of the laser hole has reached 0.002mm. The automated six-coordinate laser hole-making equipment has been successfully applied to process the aero-engine turbine blades and the combustion chamber film holes, achieving the effect of no recast layer and no microcrack.
Laser cutting is suitable for parts made of heat resistant alloys, titanium alloys, composite materials. At present, the cutting speed of thin materials can reach 15m/min, the slits are narrow, generally between 0.1 and 1mm, the heat affected zone is only 10% to 20% of the slit width, and the maximum cutting thickness can reach 45mm. It has been widely used in aircraft three-dimensional. Skins, frames, ship hull shelves, helicopter rotors, engine combustion chambers, etc.

Laser welded sheets are quite common and are mostly used in the automotive, aerospace and instrumentation industries. Laser micro-welding technology has become an important means of micro-connection of micro-package junctions in avionics and high-precision mechanical equipment.
Laser Surface strengthening, Surface remelting, alloying, and amorphization treatment technologies are becoming more and more widely used. The application of laser micromachining in electronics, biology, and medical engineering has become an irreplaceable special processing technology.
Laser rapid prototyping technology has developed from research and development to practical application, and has shown broad application prospects.