Laser cutting machine needs powerful power to ensure the stability of work. Because of the high voltage path, the grounding wire is an important part of the use process, but it is usually easy to be ignored. Poor grounding may lead to leakage and personal safety hazards. Preparation before grounding:
1. The grounding device must be 2 × four × 1500 mm × 35 degrees. It should be one meter away from any damp place around the house. It shall be used for three more times, and 30mm flat iron guide rail shall be used to excavate joints each time to form a good grounding grid.
2. When partial surface connection is completed, the grounding resistance shall be measured by the meter. 3-5 ohm standard resistance.
Laser cutting machine
After measuring the resistance, connect one end of the rvv2.5mm2 copper core wire to the lead end of the grounding grid and directly insert it into the grounding hole of the socket of the laser cutting machine.
Different auxiliary gases are used for laser cutting machine to cut different materials. The pressure and required flow rate of auxiliary gas are different due to the different thickness of cutting materials. The pressure of auxiliary gas has a direct impact on the results of laser cutting. The working gas of the laser is used to generate laser; The shielding gas is used to protect optical devices and drive the shutter. The working gas of the laser is mixed by helium, nitrogen and carbon dioxide in a certain proportion, which is reserved in the factory to ensure better performance of the laser cutting machine; The auxiliary gas can not only blow away the slag in time, but also play a role in cooling the workpiece and cleaning the lens. The selection of different auxiliary gases can also change the cutting speed and the surface quality of the slit. The types of auxiliary gases are oxygen, air, nitrogen and argon, which are of great significance for the cutting of special metals. Air and nitrogen can be used as the protective gas during cutting to prevent the occurrence of oxide film; Argon is used for titanium cutting.
1. Compressed air
Air is suitable for cutting aluminum, non-metallic and galvanized steel plates. To a certain extent, it can reduce oxide film and save costs. Generally, it is used when the cutting plate is not relatively thick and the requirements for cutting end face are not too high. It is widely used in some product industries such as sheet metal chassis, cabinet and kitchenware.
2. Nitrogen
Nitrogen is an inert gas, which can prevent oxidation and combustion of the cutting end face of the product during cutting (it is easy to happen when the sheet metal is thick. Nitrogen can be used for products with high requirements on the cutting end face and exposed without treatment. For example, some special parts such as decoration industry and aerospace industry can be used;
3. Oxygen
Oxygen mainly plays a combustion supporting role, which can speed up the cutting and thicken the cutting thickness. Oxygen is suitable for thick plate cutting, high-speed cutting and extremely thin plate cutting. For example, some large carbon steel plates and some thicker carbon steel plate structures can use oxygen.
