Additive and subtractive composite manufacturing device and method based on in-situ multi-laser regulation and control

Abstract

The invention discloses an additive and subtractive composite manufacturing device and method based on in-situ multi-laser regulation and control. The method comprises the following steps: carrying out data processing on a data model of a part; carrying out additive treatment, specifically, forming the part through a small-light-spot continuous laser beam SLM, and carrying out remelting and laserimpact strengthening on the surface of the formed part through a pulse laser beam; carrying out subtractive treatment, specifically, carrying out irradiation softening on the part to be machined through a large-light-spot continuous laser beam, and milling the part through a cutting tool device; switching the mode into an additive manufacturing mode, and continuing additive stacking forming of thenext portion of the part; and repeating the additive treatment step and the subtractive treatment step until forming machining of the whole part is completed. According to the device and the method,multi-laser in-situ regulation and control is utilized, multi-wavelength laser additive, subtractive and tool milling integrated collaborative forming is carried out, and efficient and integrated additive and subtractive composite manufacturing of the low-defect, high-precision and high-performance part is realized.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and specifically relates to an additive-subtractive composite manufacturing device and method based on in-situ multi-laser regulation. Background technique [0002] Selective laser melting (SLM) is an additive manufacturing technology that uses high-energy lasers to rapidly melt and solidify powders and build them up layer by layer. During the forming process, the Gaussian distribution of laser energy makes it easy for the laser to cause a large amount of semi-adhesive powder on the edge of the formed part during the process of melting the powder. These adhered powders not only affect the surface quality, but even become the source of failure of the part under load. . With the development of technology, due to the advantages of high energy and short action time, pulsed lasers can be used in the field of laser additive manufacturing. High-energy pulsed laser can be used to micro-c...

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Problems solved by technology

[0003] Due to the rapid melting and solidification of the powder, the internal grains of the parts manufactured by the laser selective melting technology are finer and the dislocation density is higher than that of the traditional processing method, so the hardness and ductility of the parts are higher, which undoubtedly makes the composite manufacturing of laser additive and subtractive materials Subtractive machining such as milling in the process is more difficult

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