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Cutting And Cutting Technology Of Laser Cutting Machine
Jul 21, 2017

Each pulsed laser produces only a small particle jet, which is gradually deepened, so the plate piercing time takes a few seconds. In addition, because the hole used in the oxygen pressure and cutting the same, splash larger.

The Laser cutting machine for the absence of stamping device laser cutting machine has two basic methods of perforation:

Blast hole: (Blastdrilling), the material after continuous laser irradiation in the central form of a pit, and then coaxial with the laser beam oxygen flow quickly removed to form a hole in the molten material. The size of the general hole and plate thickness, blasting perforation uniform diameter of half of the thickness of the board, so the thicker plate blasting perforation larger diameter, and not round, should not be used in the higher parts (such as oil sieve ), Can only be used for waste. In theory, it is possible to change the cutting conditions of the acceleration section, such as focal length, nozzle position, gas pressure, etc., but in fact because the time is too short to change the above premise is unlikely. Once the perforation is completed, the auxiliary gas is immediately replaced by oxygen for cutting. In addition, pulse perforation also need to have a more reliable air control system to achieve the gas type, laser cutting machine gas pressure switching and perforation time control.

Pulse Punching: Pulsedrilling uses a pulsed laser with a high peak power to melt or vaporize a small amount of material. Commonly used air or nitrogen is used as auxiliary gas to reduce the hole expansion due to exothermic oxidation. The gas pressure is smaller than the oxygen pressure at the time of cutting. This perforation diameter is smaller, the perforation quality is better than blasting perforation. There are three ways to change the pulse width by changing the pulse frequency and change the pulse width and frequency.

Laser cutting machine cutting perforation technology: any kind of thermal cutting technology, in addition to a few cases can start from the edge of the board, the general must wear a small hole in the board. Previously in the laser punching machine is a punch with a punch out of a hole, and then use the laser from the hole began to cut. In the case of pulsed perforations, in order to obtain high quality incisions, the transition from the punching of the workpiece to the constant speed of the workpiece during continuous cutting should be viewed. The laser used for this purpose should not only have a higher output power; more important time and space characteristics of the beam, so the general cross-flow CO2 laser can not meet the requirements of laser cutting. The actual results show that the best results.