Laser cutting is to use a focused high-power density laser beam to scan the surface of the workpiece, and heat the material to thousands or even tens of thousands of degrees Celsius in a very short time, so that the irradiated material can be quickly melted, vaporized, cauterized or reach the ignition point, and at the same time, the molten substance is blown away with the help of high-speed air flow coaxial with the beam to achieve the purpose of cutting the workpiece and cutting the material.
The main factors that affect the laser cutting effect according to experience:
1. Process parameters of laser cutting.
The parameters that measure the quality of the laser cutting process and machining mainly include the laser power.
2. Cutting speed.
Affects the speed of laser cutting. In general, the higher the laser energy, the smaller the material thickness, and the higher the cutting gas pressure, the faster the cutting speed, and vice versa.
When operating on site, we should not blindly pursue the speed of laser cutting, but also take into account the quality of laser cutting. Especially for some mechanical parts with different shapes, the speed and quality should be balanced to ensure product quality.
3. Gas pressure.
The gas sprayed by laser cutting has the following functions: first, it is used to melt and cut metal materials and rely on the pressure of the injection gas to blow away the liquid metal to form an incision; The second is the cooling effect of the gas on the raw material, which can take away part of the energy from the cutting area. Therefore, the gas has an important impact on the cutting quality. Inert gases (argon or nitrogen) are used in the processing of titanium materials to reduce the problem of oxidative contamination of the material.
The effect of laser cutting of titanium materials on the finished product:
1 Raw edges. Titanium laser cutting generally uses argon or nitrogen as the auxiliary gas, which will produce a little sticky slag at the bottom of the slurry, but it is easy to remove, and the inchement will produce a hard and brittle oxide layer due to the absorption of oxygen.
2. Deformation. Due to the large amount of heat generated by the cutting of titanium, the product increases with the processing time. The first product and the last product have different amounts of deformation. If the heat cannot be reduced in time, it will cause the product to deform.