A kind of 3D printing equipment and printing method

Abstract

The invention relates to a 3D printing device and a printing method. The 3D printing equipment includes a sealed casing, a powder spreading device is arranged in the casing, and a surface topography measuring device is arranged around the powder spreading device; a data processing device is also included for obtaining the surface topography measuring device. Process the data to obtain the characteristic parameters of the surface roughness of the powder layer, and compare it with the set value; it also includes a data feedback device, which is used to receive the data processing results of the data processing device and feed back the data processing results to the operator; The feedback device is electrically connected with the data processing device. The 3D printing equipment and printing method of the present invention can realize the real-time monitoring of the flatness of the powder coating layer during the printing process, which is convenient for operators to reasonably adjust the printing process parameters, avoids product defects caused by uneven powder coating, and greatly Improve product performance.

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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