Metal cutting machines are important production processes in the industrial construction industry. At present, more raw materials are used in the cutting process, such as acetylene and propane, in order to improve production efficiency and energy saving. The so-called metal cutting machine, also called metal laser cutting machine, is the energy released when the laser beam is irradiated onto the surface of the metal workpiece to melt and evaporate the metal workpiece to achieve the purpose of cutting or engraving, with high precision and fast cutting, not limited to Cutting pattern limitation, automatic typesetting saves materials, smooth cuts, low processing cost, etc.
As a new type of tool, high-speed metal cutting machines are increasingly used in various industries. So how is laser cutting used? How to distinguish laser cutting?
First, the energy of the laser is concentrated into a high-density beam in the form of light. The beam is transmitted to the working surface, generating enough heat to melt the material, and the high-pressure gas coaxial with the beam directly removes the molten metal, thereby achieving the purpose of cutting. This shows that the laser cutting process is essentially different from the machining of the machine tool.
It uses the laser beam emitted from the laser generator to be focused into a high power density laser beam irradiation condition through an external circuit system. The laser heat is absorbed by the workpiece material, and the temperature of the workpiece rises sharply. After reaching the boiling point, the material begins to vaporize and form. The hole, as the beam moves relative to the workpiece, eventually causes the material to form a slit. The process parameters (cutting speed, laser power, gas pressure, etc.) and the trajectory of the slit are controlled by the numerical control system, and the slag at the slit is blown off by the auxiliary gas of a certain pressure.
An auxiliary gas suitable for the material to be cut is also added during the laser metal cutting process. When steel is cut, oxygen is used as an auxiliary gas to generate an exothermic chemical reaction oxidizing material with the molten metal, and at the same time, it helps to blow away the slag in the grid. For metal parts with high processing accuracy, nitrogen is commercially available as an auxiliary gas.
Most organic and inorganic materials can be cut with a laser. In the metal processing industry, which has a heavy weight in industrial manufacturing, many metal materials, no matter what kind of hardness, can be cut without deformation. (The thickness of industrial steel can be cut by the most advanced metal laser cutting machine. Close to 20mm). Of course, for high reflectivity materials such as gold, silver, copper and aluminum alloys, they are also good heat transfer conductors, so laser cutting is difficult or even impossible to cut (some hard-to-cut materials can be cut with a pulsed laser beam, Due to the extremely high pulse wave peak power, the absorption coefficient of the material to the beam is instantaneously increased sharply).www.chamferingmachinechina.com