Molten pool width prediction method for 3D printing selective laser melting technology

By improving the heat source model and considering the influence of the gas flow field, the melt pool width in the 3D printing selection laser melting technology is used to simulate the melt pool width in the 3D printing selection area, which solves the problem that the melt pool width is difficult to accurately predict in the prior art, and improves the forming quality and process stability.

CN119692254AActive Publication Date: 2025-03-25HANGZHOU YIJIA 3D ADDITIVE TECH CO LTD
5 Cites 0 Cited by

Patent Information

Application Number
CN202510201550.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-24
Publication Date
2025-03-25
Estimated Expiration
2045-02-24

AI Technical Summary

Technical Problem

In 3D printing selective laser melting technology, changes in the melt pool width will directly affect the forming quality, and it is difficult for the prior art to accurately predict and control the melt pool width.

Method used

By improving the heat source model, considering the influence of the gas flow field, using computational fluid dynamics software to simulate, construct powder bed models and create geometric mesh models, set up physical models including heat source models, heat conduction models, fluid dynamics models, phase transition models, surface tension models and turbulence models, and perform laser melting simulations to measure the melt pool size.

Benefits of technology

Improve the accuracy of heat source modeling, accurately predict and control the melt pool width, thereby improving the forming quality and process stability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention belongs to the technical field of 3D printing, and provides a molten pool width prediction method for a 3D printing selective laser melting technology, and the method comprises the steps: constructing a powder bed model, and obtaining the coordinate information of each particle in a powder bed; carrying out geometric mesh model creation on the powder bed model; inputting the geometric grid model into computational fluid dynamics software, and determining attributes of a to-be-melted material used by the geometric grid model; selecting a physical model in computational fluid dynamics software; setting each physical model; according to the principle that the Reynolds number is not changed after the model is reduced and the reduction proportion is adjusted, the equivalent gas flow rate is calculated, and a gas flow field is loaded; carrying out laser melting simulation after initializing computational fluid dynamics software and setting parameters, and measuring to obtain the size of the molten pool. According to the method, the complex flowing behavior in the molten pool can be effectively simulated, and the accurate molten pool width prediction size is obtained.
Need to check novelty before this filing date? Find Prior Art