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Selective laser melting process monitoring system based on multi-sensor fusion

A multi-sensor fusion and laser melting technology, applied in the field of additive manufacturing, can solve problems such as low reliability, improve processing quality, optimize process parameters, and ensure reliability and stability.

Active Publication Date: 2021-04-20
HUAZHONG UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention proposes a selective laser melting process monitoring system based on multi-sensor fusion, thereby solving the technical problem of relatively low reliability existing in relying on single sensor monitoring

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0035] The invention provides a selective laser melting process monitoring system and method based on multi-sensor fusion, which aims to make up for the defect of a single signal source, fuse vibration signals, image signals and temperature signals, and realize multi-sensor fusion monitoring. It not only monitors the entire processing environment and the part forming area, but also realizes the ...

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Abstract

The invention discloses a selective laser melting process monitoring system based on multi-sensor fusion, which belongs to the field of additive manufacturing. The first vibration module and the second vibration module respectively complete the monitoring of the scraper and the forming substrate. The infrared thermal imaging module is used In order to obtain the temperature field during processing, the coaxial high-speed camera module realizes the monitoring of the state of the molten pool, the side-axis industrial camera module obtains the state information of the powder layer and the processing surface of the part, and the monitoring module performs melting according to the vibration signal, image signal and temperature signal Process Monitoring. Through the present invention, during the selective laser melting process, the state information of the molten pool, powder bed, part forming surface, scraper and temperature field can be obtained in real time, and the surface state of the powder layer and the forming process can be accurately monitored through the monitoring method of multi-sensor fusion Real-time monitoring of the selective laser melting process is of great significance for improving the stability and reliability of the processing quality of parts.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a selective laser melting process monitoring system based on multi-sensor fusion. Background technique [0002] Selective Laser Melting (SLM) is one of the most widely used additive manufacturing technologies at present, because it can manufacture parts with complex structures and excellent performance, especially parts with complex internal structures, it is widely used in aerospace and automatic processing. and medical devices have a wide range of applications. The selective laser melting process is mainly divided into three stages: in the first stage of powder spreading, the powder is spread on the forming platform with the help of scraper or roller, and the layer thickness is about tens of microns; in the second stage of laser melting, the laser The set scanning path will melt the powder into shape, and the scanning path will be generated by slicing soft...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G01H17/00G01J5/00G01N21/88
CPCG01D21/02G01H17/00G01J5/00G01J2005/0077G01N21/88
Inventor 周奇李京昌曹龙超胡杰翔林泉盛闽华彭玉童
Owner HUAZHONG UNIV OF SCI & TECH
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