Self-developed Selective Laser Melting Equipment Monitoring System to Escort the Forming Quality of Parts

Author: Radium laser



Selective laser melting technology has high printing accuracy and has been widely used in aerospace, energy power, automobile manufacturing, mold and other fields.

Large-scale and complex structural parts require equipment to continuously print for a long time. In the continuous printing process, serious problems such as powder falling/powder stacking, insufficient powder spreading, part warping, powder bed scraping and the like are easy to cause serious problems such as incomplete fusion of parts, excessive remelting, collision between parts and scraper, sintering black spots and the like, which affect the printing effect. In response to the above problems, Radium Laser independently developed a monitoring system for selective laser melting equipment, which can detect the printing status in real time and provide a strong guarantee for the long-term continuous and stable operation of the equipment.

The monitoring system can calculate according to the state image after scanning and powder spreading, obtain the information of powder spreading state and printing area and feed it back in real time. At the same time, adjust the detection threshold to set the early warning/shutdown area and the number of defects. The system automatically marks defects and makes targeted treatment. In addition, it also has a high-precision automatic grafting function, which can automatically identify the position of the part base, match the slice information, and realize automatic grafting printing.

Introduction to common options

Detection Settings
The detection can be set to skip the number of layers to prevent the powder from not completely covering the surface of the substrate to affect the detection.

Defining Thresholds
Set the detection alarm and shutdown parameters. When the defect exceeds the alarm value, the shutdown will be triggered; if not, the defect location and type will be identified and the warning will be provided.

image retrieval
The test results and original images are retained after powder spreading and scanning in each layer of printing, which can be quickly searched in the software.
This function has the following features:
(1) by time search, can be traced back to all parts of each layer of the picture;
(2) prompt and mark the defect type in the picture, and enlarge the picture to observe the details;
(3) Different types of defects are marked separately.


Introduction to Detectable Defect Types

The detection system automatically identifies and distinguishes between the printing area and the non-printing area, and if there are defects, marks and prompts; for different degrees of defects, the equipment takes different disposal actions, such as patching, early warning, and alarm.

Defect detection after powder spreading

Multi-powder detection in printing area: detection accuracy can reach 1mm ²

Example of detection effect, the green part is the printed product area

Less powder detection in printing area: detection accuracy can reach 1mm ²

Example of detection effect

Print area warping detection: detection accuracy up to 1mm ²


Example of detection effect

Scraping detection in printing area: the detection accuracy of scraper width can reach 0.5mm


Example of detection effect

Defect detection in the post-scan state

Black spot detection in printing area: detection accuracy can reach 1mm ²

Example of detection effect

Print area parts skew detection: detection accuracy up to 0.5mm


Example of detection effect


The laser selective melting equipment monitoring system independently developed by Radium Laser has been verified. As a domestic metal 3D printing equipment manufacturer, we will consistently adhere to high-quality manufacturing, continue to innovate industrial technology, enhance the competitiveness of each link, and provide customers with more High-quality solutions.

Related Articles

Permalloy additive manufacturing process plan, radium laser soft magnetic alloy forming process details!

Permalloy refers to an iron-nickel alloy with a nickel content in the range of 30% to 90%. This kind of soft magnetic alloy can effectively control the magnetic properties through appropriate process. It is a typical functional material with high permeability, low coercivity, high saturation magnetic induction, high Curie temperature, good corrosion resistance and good processing performance. Mainly used in alternating magnetic field, widely used in aerospace industry and telecommunications, measurement and control system. Commonly used permalloy 1J50, 1J79, 1J85 and so on. In the field of aerospace industry, permalloy is mainly used to manufacture precision components with high sensitivity, fine size, small size and low high frequency loss.


New Equipment, New Advantages, New Development | Dr. Guan Kai Talks to MM "Insight" Program, Talking about the Development of Additive Material Industry

Additive manufacturing combines 3D printing with industrial production, creating a new processing method, and has irreplaceable advantages in the manufacturing of complex structural parts. Recently, Dr. Guan Kai, general manager of Tianjin Radium Laser Technology Co., Ltd., accepted an exclusive interview with MM's "Insight" program and expressed a clear view on the hot topic of additive manufacturing. MM "Insight"


Gather in Chang 'an, Talk about Additive Material | Radium Laser Appears at 6th IAME Conference

The 6th China (Xi 'an) International 3D Printing Conference and Qin Chuangyuan 3D Printing High-end Forum opened today. Radium Laser was unveiled with LiM-X150A equipment and typical metal 3D printing displays, sharing technological achievements and application cases, discussing the future development direction of additive manufacturing, and going to the digital future together.


Market Activity