Flame cutting as the initial traditional cutting method due to its low investment, the past processing quality requirements are not high, the requirements are too high when adding a machining process can be resolved, the market retains a very large. Now it is mainly used to cut more than 40mm thick steel plate. Its disadvantage is that the thermal deformation during cutting is too large, the slit is too wide, wasting materials, and then the processing speed is too slow, only suitable for rough processing.   

 Plasma cutting and fine plasma cutting is similar to flame cutting, the heat-affected zone is too large, but the accuracy is much larger than flame cutting, and the speed has an order of magnitude leap, and has become the main force in the processing of center plate. Domestic top CNC fine plasma cutting machine on the line of the actual cutting accuracy has reached the lower limit of the laser cutting, in cutting 22mm carbon steel plate to reach more than 2 meters per minute speed, and cut the end surface smooth and flat, good slope can be controlled within 1.5 degrees, the disadvantage is that the thermal deformation is too large in the cutting of thin steel plate, the slope is also larger in the precision requirements of the high powerlessness, the consumables are more expensive.   

    High-pressure water cutting is the use of high-speed water jets doped with emery to implement the cutting of sheet metal, it is almost no restriction on the material, the thickness of the cut is almost up to 100mm or more, ceramics, glass and other materials that are prone to bursting with thermal cutting can be cut, copper, aluminum and other highly reflective materials on the laser waterjet can be cut, while the laser cutting is a greater obstacle. The disadvantages of waterjet cutting are that the processing speed is too slow, too dirty, not environmentally friendly, and the consumables are also higher.  

    Laser cutting processing is a process revolution in sheet metal processing, sheet metal processing in the “processing center”. Laser cutting processing has high degree of flexibility, fast cutting speed, high productivity, short production cycle, and has won a wide range of markets for customers. Laser cutting without cutting force, processing without deformation; no tool wear, good material adaptability; whether simple or complex parts, can be cut with a laser one-time precision rapid prototyping; its narrow slit, good cutting quality, high degree of automation, easy to operate, low labor intensity, no pollution; can be realized by cutting the automatic row of samples, nesting, improve the utilization rate of the material, low cost of production, and good economic efficiency. The effective life of the technology is long, at present in foreign countries over the structure of 2 mm sheet mostly using laser cutting, many foreign experts agreed that the next 30-40 years is the golden age of laser processing technology development (is the direction of development of sheet metal processing)