Support-free forming method in multi-laser additive and subtractive composite manufacturing

By employing a multi-laser additive and subtractive composite manufacturing method, and utilizing the synergistic operation of continuous, femtosecond, and picosecond lasers, the problems of warping deformation and thermal stress accumulation in overhanging structures during additive manufacturing have been solved. This has enabled efficient and precise unsupported molding, reducing material consumption and manufacturing costs.

CN121669962APending Publication Date: 2026-03-17GUANGDONG INST OF NEW MATERIALS
0 Cites 0 Cited by

Patent Information

Application Number
CN202511852881.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-10
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing metal additive manufacturing technologies suffer from problems such as warping deformation, poor surface quality due to powder adhesion, and dimensional accuracy issues caused by thermal stress accumulation when processing overhanging structures. Traditional methods cannot simultaneously guarantee forming efficiency, surface accuracy, and mechanical properties.

Method used

A multi-laser additive and subtractive manufacturing method is employed, combining continuous laser, femtosecond laser, and picosecond laser. Through an intelligent partitioned scanning strategy and a real-time monitoring and feedback system, supportless molding is achieved. Continuous lasers are responsible for the molten deposition of the main structure, femtosecond lasers perform macroscopic subtraction, and picosecond lasers perform microscopic subtraction. These three technologies work together to reduce material waste and residual stress.

Benefits of technology

It achieves high-precision supportless molding, reduces material waste by more than 30%, reduces residual stress to <50MPa, and improves dimensional accuracy to ±0.05mm, meeting aerospace cleanroom standards.

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

Abstract

The invention relates to an unsupported forming method in multi-laser additive and subtractive composite manufacturing, and belongs to the technical field of additive manufacturing. According to the method, a three-laser cooperative working system is adopted and comprises a continuous optical fiber laser used for SLM additive manufacturing, a femtosecond laser used for macroscopic subtractive machining and a picosecond laser used for microcosmic subtractive finish machining. Through an intelligent partition scanning strategy, a thermal stress layer-by-layer regulation and control technology and a real-time monitoring feedback system, high-precision support-free manufacturing of metal parts is achieved. According to the method, firstly, fused deposition of a main body structure is completed through continuous laser, then macroscopic contour finishing and removing are conducted through femtosecond laser, and finally surface micromachining and fine feature forming are conducted through picosecond laser. The forming quality of a suspension structure and a low-angle inclined plane is remarkably improved, the problems of material waste, complex post-treatment and the like caused by a traditional supporting structure are solved, and high-efficiency and high-performance integrated manufacturing of a complex metal structural part is achieved.
Need to check novelty before this filing date? Find Prior Art