Compared with other thermal cutting methods, the same way as the thermal cutting process, other methods can not act as a laser beam acting on a very small area, resulting in wide incision, large heat affected zone and obvious deformation of the workpiece. The laser cutting machine cuts metal and nonmetal.
Oxygen fuel (such as acetylene) cutting. This method is mainly used for cutting low carbon steel. Because of its great heat input and low cutting speed, it is rarely used to cut materials with exact sizes under 6mm. Plasma cutting. The cutting speed is obviously faster than oxyacetylene cutting, but the cutting quality is poor. The top of the cutting edge is round headed, the cutting edge is obviously wavy, and the ultraviolet radiation produced by the arc is also prevented. It is slightly better than the laser cutting machine, because it is suitable for cutting the thicker steel plate and the aluminum alloy with high reflectivity to the beam.
Die blanking. A large number of parts die punching method, low cost, short production cycle. But its adaptability to the design changes is very poor, the new mold needs a long time design, high cost, for medium and small-scale production, the characteristics of laser cutting will be fully displayed. In addition, the laser programmed cutting facilitates the close arrangement of the workpiece and saves material, while the die stamping requires the material to be reserved around each workpiece.
Segment punching of complex parts. In general, the workpiece is much larger than the size of the die punch often hub, some parts are complex, which leads to the cutting edge is many small conchoidal edge, second preliminary processing renovation. In addition, the punches form a much wider incision than the laser cutting machine, producing a large amount of iron filings. Sawing. Cutting thin metal, its speed is significantly slower than laser cutting, and laser as a flexible non-contact, profiling cutting tool, cutting from any point of the material, cutting it in any direction. This point, sawing is difficult to do.
Edm. In general, use electric corrosion or melting effect of EDM and ECM two methods used for fine processing of hard material, the roughness of the incision is better, but the cutting speed is higher than that of laser cutting machine speed several orders of magnitude. Water cutting. Many metals can be cut, but the cost is high.