Laser-induced breakdown spectroscopy (LIBS)-based selective laser melting (SLM) formation process on-line detection equipment

Abstract

The invention discloses laser-induced breakdown spectroscopy (LIBS)-based selective laser melting (SLM) formation process on-line detection equipment, which is used for realizing the on-line monitoring of the physical mechanism and component change of an SLM formation process and solving the technical problem that the component information of metal additive manufacturing materials is very difficult to detect in an on-line way. The LIBS-based SLM formation process on-line detection equipment comprises a pulse laser, an indicating laser, a spectrophotometer and a matched detector thereof, an optical transmission system and a computer. The LIBS-based SLM formation process on-line detection equipment can be matched with SLM formation equipment for use, and can be used for detecting the components of a forming platform in the SLM formation process in real time and analyzing the physical mechanism of a machining process by means of the component change; furthermore, the LIBS-based SLM formation process on-line detection equipment realizes on-line detection of multiple points and selected points by using one-division multichannel energy transmission optical fibers, and reduces detection cost under the premise of realizing the full-scale detection of the forming platform.

Description

technical field [0001] The invention belongs to the field of online detection of laser additive manufacturing process, specifically a multi-point and point-selected LIBS component online detection system, which is mainly used for online detection of component information of laser selective laser melting (Selective LaserMelting, referred to as SLM) additive manufacturing process . Background technique [0002] Laser additive manufacturing technology, commonly known as laser 3D printing technology, is based on the principle of discrete accumulation and realizes manufacturing through the gradual accumulation of materials. It uses a computer to cut the 3D model of the formed part into a series of "thin slices" to a certain extent, and manufactures each layer of "thin slices" from top to bottom, and finally superimposes and forms a three-dimensional solid part. Laser additive manufacturing technology integrates material science, mechanical processing and laser technology, and us...

AI Technical Summary

Problems solved by technology

[0007] However, in the SLM forming process, the laser is driven by the scanning galvanometer, the powder in the forming area is static, the size of the molten pool is small, the moving speed is fast, the plasma generated during the forming process is unstable, and it is difficult to directly collect the laser sintering powder in the additive manufacturing process The plasma emission spectrum; and the interior of the SLM equipment processing chamber is small, and there is no extra space for testing equipment

Therefore, using LIBS technology to detect the SLM forming process will have the problems of difficult equipment integration and spectrum acquisition.

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