Jiangsu Kuntai Machinery Co.,Ltd

Jiangsu Kuntai Machinery Co.,Ltd

Cutting Machine The Basic Method

Any kind of thermal cutting technology, except for a few cases can start from the edge of the board, Cutting Machine the general must wear a small hole in the board. Cutting Machine Before the laser punching machine is a punch with a punch out of a hole, Cutting Machine and then use the laser from the hole began to cut. Cutting Machine There are two basic methods for punching a laser cutting machine without a punching device:

Blasting Perforation - The material is formed into a pits in the center after continuous laser irradiation, and then the molten material is removed by a coaxial oxygen stream with the laser beam to form a hole. The size of the general hole and plate thickness, Cutting Machine blasting perforation average diameter of half of the thickness of the board, so the thicker plate blasting perforation larger diameter, and not round, Cutting Machine not in the processing of high precision parts used, On the waste. In addition, Cutting Machine the oxygen pressure used in the perforation is the same as that at the time of cutting, and the splash is large.

Pulse perforation - pulsed laser with high peak power to melt or vaporize a small amount of material. Cutting Machine 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. Cutting Machine Each pulsed laser produces only a small particle jet, which is gradually deepened, Cutting Machine so the plate piercing time takes a few seconds. Once the perforation is completed, the auxiliary gas is immediately replaced by oxygen for cutting. This perforation diameter is smaller, the perforation quality is better than blasting perforation. The laser used for this purpose should not only have a higher output power; more importantly, the beam time and space characteristics, so the general cross-flow CO2 laser can not meet the requirements of laser cutting. In addition, Cutting Machine pulse perforation also need to have a more reliable air control system to achieve the gas type, gas pressure switching and perforation time control.

In the case of pulsed perforation, Cutting Machine in order to obtain high-quality incision, from the workpiece when the pulse punch to the workpiece constant speed continuous cutting transition technology should be taken seriously. In theory, it is possible to change the cutting conditions of the accelerating section, such as focal length, nozzle position, gas pressure, etc., Cutting Machine but it is unlikely that the above conditions are actually changed due to the time being too short. In the industrial production mainly to change the average power of the laser method is more realistic, the specific method is to change the pulse width; change the pulse frequency; at the same time change the pulse width and frequency.

This is because the machine (only for high-power laser cutting machine) in the processing of small holes is not to take the way of blasting perforation, Cutting Machine but with pulse perforation (soft puncture) way, which makes the laser energy in a very small area is too concentrated, The non-processing area is also charred, resulting in deformation of the hole, affecting the quality of processing. Cutting Machine At this time we should be in the process of pulse perforation (soft puncture) way to blasting perforation (ordinary puncture) way to be resolved. Cutting Machine And for the smaller power of the laser cutting machine is just the opposite, Cutting Machine in the small hole processing should take the way of pulse perforation in order to achieve better surface finish.

The above situation, Cutting Machine the first consideration when cutting low carbon steel burr factors, but can not simply speed up the cutting speed, Cutting Machine because the speed of the plate sometimes do not wear the situation, this situation is particularly prominent in the processing of aluminum zinc plate The At this time should be considered in conjunction with other factors to solve the machine, such as whether the nozzle to be replaced, the rail movement is unstable and so on.

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