Online monitoring device for surface hardness of 3D printing part in forming process and method

Abstract

The invention belongs to the technical field of 3D printing equipment detection and discloses an online monitoring device for the surface hardness of a 3D printing part in a forming process. The device comprises a workbench, a laser, a spectrograph, a light path device, a reflector, an electric control displacement device, a computer and a support. The electric control displacement device, the laser and the support are sequentially arranged on the workbench, the laser is arranged below the reflector, the light path device is arranged on one side of the electric control displacement device, andthe computer is arranged above the workbench. The invention further discloses a detection method. The device is mounted in a forming chamber of 3D printing equipment, the pulse laser irradiation canbe performed on a formed part of the part in real time to generate plasma, plasma spectrum data are collected to evaluate the surface hardness of the formed part, a condition that the overall surfacehardness of the 3D printing part meets a design requirement is ensured through online real-time hardness detection, and the phenomenon that the hardness does not reach a standard due to unpredictablefactors in the forming process is avoided.

Description

technical field [0001] The invention belongs to the technical field of 3D printing equipment detection, and in particular relates to an online monitoring device and method for surface hardness during the forming process of 3D printing parts. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing; 3D printing is usually used Realized by digital technology material printers, it is often used to manufacture models in mold manufacturing, industrial design and other fields, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic informat...

AI Technical Summary

Problems solved by technology

[0003] In the existing 3D printing technology, some mechanical parts with surface hardness requirements cannot be put into use immediately, and their hardness needs to be tested to meet the hardness requirements of the parts before they can be used; traditional hardness testing methods, such as dimension Hardness tests, etc., often require destructive sampling of the detection target. This method is not suitable for the application requirements of one-time molding of 3D printed parts. The detection is inaccurate and cannot detect all parts of the parts, resulting in low detection accuracy. There is no guarantee that the hardness of the parts meets the standard

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