Magnetic field auxiliary laser polishing method based on existing laser processing equipment

Abstract

The invention relates to a magnetic field auxiliary laser polishing method based on existing laser processing equipment. Compared with existing polishing technology, introduction of an auxiliary magnetic field obviously improves the surface quality of a polishing piece. The magnetic field auxiliary laser polishing method based on the existing laser processing equipment comprises the following steps that 1, a pollution layer or an oxidation layer of the material surface is removed by adopting laser cleaning technology; 2, a magnetic field parameter is arranged, the polishing piece is placed ina stable magnetic field after the communicating and stable magnetic field is formed; and 3, a laser processing optimized parameter is arranged, polishing treatment is carried out on the material surface under the magnetic field auxiliary action. The auxiliary magnetic field can adjust and control molten pool flowing and plasma moving in the processing process, negative effect generated by mutual action of a laser and materials is effectively reduced, so that the surface of the polishing piece obtains fine and uniform microstructures, the strength, hardness, corrosion resistance and the like ofthe material surface are improved, the processing technology and processing areas of the laser are adjusted flexibly, the processing precision is high, the efficiency is high, and the cost is low.

Description

technical field [0001] The invention belongs to the field of laser processing, in particular to a magnetic field-assisted laser polishing method based on existing laser processing equipment. [0002] technical background [0003] Due to the limitations of traditional processing on the forming of complex workpieces, Additive Manufacturing (AM) has emerged and developed. Compared with traditional processing, AM technology does not require tools, fixtures and complex processing procedures, and can quickly and precisely manufacture parts of any complex shape, realize "free manufacturing" of parts, solve the forming of many complex structural parts, simplify the production process, Shorten the production cycle. As far as the current situation is concerned, there are still many problems in the workpiece obtained by AM. Due to the defects and excessive roughness of the workpiece surface, the workpiece is easily cracked and corroded at the defect during use, which makes the workpiec...

AI Technical Summary

Problems solved by technology

At present, laser polishing technology has made some research progress, but in the process of laser-material interaction, the rapid melting and rapid solidification of materials makes the liquid molten pool exist for a very short time, and the surface is flattened simply by using liquid gravity and surface tension. The effect is extremely limited. In addition to optimizing the laser processing parameters, how to use the auxiliary process to further improve the quality of the polished surface has important research significance.

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