3D printing equipment and printing method

Abstract

The invention relates to 3D printing equipment and a printing method. The 3D printing equipment comprises a sealed shell body, a data processing device and a data feedback device. A power laying device is arranged in the shell body. A surface topography measuring device is arranged around the power laying device. The data processing device is used for processing data obtained by the surface topography measuring device, and a characteristic parameter of unevenness of the surface of a powder layer are obtained and compared with a set value. The data feedback device is used for receiving a data processing result of the data processing device and feeding back the data processing result to an operator. The feedback device is electrically connected with the data processing device. According to the 3D printing equipment and the printing method, the flatness of power laying layer can be monitored in real time in the printing process, it is convenient for the operator to reasonably adjust printing technology parameters, the product detect caused by nonuniform power laying is avoided, and accordingly the performance of the product is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing device and a printing method. Background technique [0002] 3D printing technology is a kind of rapid prototyping technology. It is based on a three-dimensional model, using metal powder or plastic and other bondable materials to construct three-dimensional three-dimensional parts by scanning layer by layer and stacking layer by layer. technology. This technology combines various disciplines such as CAD / CAM, optics, numerical control and material science, and has a wide range of applications. It has application prospects in jewelry, medical care, footwear, industrial design, architecture, aerospace, automobiles, education, etc. [0003] At present, for the 3D printing process of metal materials, SLM is the mainstream process. SLM technology is developed on the basis of SLS. The basic principles of the two are similar. SLM technology needs to comple...

AI Technical Summary

Problems solved by technology

However, at present, the performance testing of metal powders for additive manufacturing still remains at the traditional parameter testing level. Using traditional powder material testing methods for characterization, the accuracy is not high, often resulting in the quality of the actual printed products not reaching the expected standard

[0005] During the research process, the applicant found that during the printing process of the product, the surface morphology of each layer of powder has a great influence on the performance of the printed product. The unevenness and defects caused by a certain layer of powder coating will cause a product defect, while Defects will further cause stress concentration and other effects, which will greatly reduce the performance of the product

However, when the existing 3D printing equipment is running, when there is a defect in a certain layer of powder coating, because the quality of the powder coating layer cannot be judged, it will generally continue to print, which will affect the performance of the product.

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