Universal laser path optimization method and module for metal 3D printing

By optimizing the slice and path thermal balance of the three-dimensional model and dynamically adjusting the laser parameters and scanning paths, the thermal stress concentration problem of complex structural parts in metal 3D printing is solved, and the forming quality and production efficiency are improved.

CN120460745APending Publication Date: 2025-08-12SUZHOU AMPRO LTD
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Patent Information

Application Number
CN202510567662.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-30
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

When the existing metal 3D printing process prints complex structural parts, the temperature field is uneven, resulting in excessive local temperature gradient, causing concentrated thermal stress, and mass defects such as warping, collapse, and fracture. The existing path planning lacks universality.

Method used

By slicing the three-dimensional model and initial path planning, the path thermal equilibrium optimization module is used to evaluate the high-forming risk areas, and dynamically adjust the laser power, vector spacing, scan timing and vector length through the optimization function to generate a new laser scanning path data set to reduce the local temperature gradient.

Benefits of technology

It significantly improves defects such as warping and collapse, improves the forming quality and production efficiency of complex structural parts, and is suitable for efficient printing of a variety of complex structures, reducing printing time.

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Abstract

The invention discloses a universal laser path optimization method and module for metal 3D printing, and the method comprises the following steps: S1, carrying out the slicing and initial path planning of a three-dimensional model, and generating printing data containing vector coordinates, a scanning time sequence, laser power and a scanning speed; s2, the printing data and the equipment parameters are imported into a path heat balance optimization module, and a high forming risk area is evaluated based on a temperature field distribution model; s3, laser path secondary optimization is conducted on the high forming risk area through a preset optimization function, and a new laser scanning path vector data set is generated; s4, importing the optimized path vector data set into printer control software for processing; the laser parameters and the scanning path are dynamically adjusted, so that the local temperature gradient is reduced, the thermal stress concentration is reduced, and the defects of warping, collapse and the like are overcome; the optimization function based on the mathematical model can adapt to various complex structures and is suitable for efficient printing of macroscopic-mesoscopic integrated parts, and the production efficiency is improved.
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