The application of optical fiber laser cutting machine

Optical fiber laser cutting machine in cutting steel or iron plate, generally must be a small hole on the plate. Except a few cases can start on the plate edge in laser punching compound machine is to use the punch first rushed out of a hole, and then begin from the holes by laser cutting. For not punching device of laser cutting machine has two kinds of the basic ways of perforation:
- blasting perforation material after continuous laser irradiation in the center of the formation of a pit, and then by coaxial laser beam with oxygen flow will soon melt material removal, forming a hole. General hole size and thickness, average diameter of blasting perforation thickness of the half, so the blasting perforation aperture is bigger, thicker plate and not round, should not be used on machining precision to demand higher parts, can only be used for waste. In addition due to perforation of oxygen to the same pressure and cutting, splash is bigger.
- with peak power of pulse laser pulse perforation make a small amount of material to melt or vaporize, commonly used as auxiliary air or nitrogen gas, to reduce the make hole expansion with exothermic oxidation, gas pressure is cutting the oxygen pressure is small. Each pulse laser to produce only a small particle injection, gradually thorough, so thick plate punch time takes a few seconds. Once the perforated completion, auxiliary gas into oxygen cutting. This perforation diameter smaller, the perforation quality is better than that of blasting hole. For the use of laser should not only have high output power; More important is time and space characteristics of beam pulse perforation also need to have a reliable pneumatic control system, so as to realize the switch of the gas type, gas pressure and aperture time control.