Laser cutting method and device

Abstract

The embodiment of the invention belongs to the technical field of laser processing, and particularly relates to a laser cutting method and device. The method comprises the following steps that a workpiece to be processed is placed on a workbench; focus testing is performed, the workpiece is adjusted to the height suitable for being cut, and a cutting path needed by a workpiece is input to a control center; according to the material and specification of the workpiece, the laser cutting speed corresponding to the moving speed of a cutting head when the workpiece is cut, the laser pulse frequencyduring workpiece cutting and the laser power during workpiece cutting are set; the cutting head irradiates laser beams to the workpiece and sprays cutting auxiliary gas, in the state that the portion, irradiated by the laser beams, of the workpiece is covered with the cutting auxiliary gas, the cutting head is moved relative to the workpiece, the cutting work is performed on the workpiece, processing can be performed under the high cutting speed state, it is ensured that enough heat is produced to cut through the workpiece, and meanwhile it is ensured that no or few material melting phenomenawere caused.

Description

technical field [0001] The present application relates to the technical field of laser processing, and more specifically, to a laser cutting method and device. Background technique [0002] Laser cutting technology is widely used in the processing of metal materials, which can greatly reduce processing time, reduce processing costs and improve workpiece quality. Laser cutting has the advantages of cutting quality, high cutting speed, high flexibility, and wide material adaptability. The principle of laser cutting is: to use beam concentration to achieve high power density, so that the material is quickly heated to vaporize and evaporate to form holes, and as the beam moves linearly with the material, the holes are continuously formed into narrow slits. [0003] When cutting metal pipes, they are generally stainless steel pipes. The surface of metal round pipes is uneven, so it will be difficult to cut them with traditional machining. When using laser cutting metal pipes, th...

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Problems solved by technology

[0003] When cutting metal pipes, they are generally stainless steel pipes. The surface of metal round pipes is uneven, so it will be difficult to cut them with traditional machining. When using laser cutting metal pipes, the cutting speed is too fast. The material cannot be completely separated and the edge is not smooth; too slow will cause the metal material to melt and there will be slag on the edge

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