In the application of three-dimensional laser cutting technology, metal parts are the main products. Later, with the development of science and technology and the continuous efforts of researchers, the three-dimensional machine laser cutting machine developed from hundreds of power at the beginning to thousands, tens of thousands. At the same time, it has become the "main force" of the manufacturing and processing market with its unique advantages. Compared with other cutting technologies, three-dimensional laser cutting technology still has a certain gap, but each has its own advantages, learning from each other and helping each other in the same boat. The principle of three-dimensional laser cutting technology is to irradiate the laser beam on the surface of the workpiece, and achieve the processing purpose through melting or evaporation technology, in which the cutting head does not contact the workpiece, reducing the probability of raw material damage. With its characteristics of fast cutting speed, high precision and strong flexibility, this process helps enterprises improve processing efficiency and reduce production costs.

In order to meet the requirements of convenience, rapidity and cutting effect, different processing principles will appear in the processing of three-dimensional laser cutting machine.

1. Vaporization cutting: the high-power laser beam vaporizes in a short time, forming steam and forming a notch on the surface of the workpiece. The vaporization heat of such a workpiece is generally large, so the vaporization processing used in laser cutting will require high power and high density.

2. Melting cutting: in the process of laser cutting machine processing, the laser can melt the metal workpiece, and rely on strong pressure to discharge the gas from the liquid metal, thus forming a notch. It is noted that the gas blown out of the nozzle is not oxidizing gas Ar, he, N, etc.), and the heat required is also 1 / 10 of that of vaporization cutting.

Melting cutting mainly includes oxygen and nitrogen cutting. Oxygen is mainly used for cutting carbon steel. During the cutting process, oxygen reacts with metal to give off a large amount of oxidation heat. At this time, the air pressure will blow out the oxide and slag from the reaction zone, forming a notch on the surface of the workpiece. Nitrogen is suitable for cutting aluminum and stainless steel, but it can also cut carbon steel plates with a certain thickness. No matter what kind of workpiece is processed by the three-dimensional laser cutting equipment, the higher the power, the greater the thickness of the plate that can be cut.

The principle of three-dimensional laser cutting equipment is melting cutting. Its cutting section is smooth, flat and free of slag, which not only meets people's aesthetic needs, but also is deeply welcomed by the majority of enterprise users.