A laser coaxial filament additive manufacturing apparatus and method based on multi-medium synergistic cooling

By using a multi-medium synergistic cooling system, precise temperature control in the laser additive manufacturing process was achieved, solving the problems of single cooling methods and insufficient monitoring means, and improving product quality and stability.

CN120170270BActive Publication Date: 2026-03-13NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202510205625.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-02-24
Publication Date
2026-03-13
Estimated Expiration
2045-02-24

AI Technical Summary

Technical Problem

Current laser additive manufacturing uses a single cooling method, making it difficult to achieve precise temperature control in the additive manufacturing area. It also lacks a synergistic mechanism among multiple cooling media, making it difficult to adjust cooling parameters in real time and limiting monitoring methods, which leads to a decline in product quality.

Method used

The system employs a multi-media synergistic cooling system, including water mist cooling, gas cooling, and substrate cooling. It achieves real-time monitoring and intelligent control of the temperature field through high-precision sensors and programmable logic controllers. The system has a high degree of integration and supports the synergistic operation and parameter adjustment of multiple cooling media.

Benefits of technology

This technology enables gradient temperature field control in the additive manufacturing region, improving the metallurgical quality and mechanical properties of additive manufacturing joints, reducing thermal stress and deformation, and ensuring process stability and product quality.

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Abstract

This invention discloses a laser coaxial filament additive manufacturing apparatus and method based on multi-medium synergistic cooling, comprising a laser welding head, a water mist cooling system, a gas cooling system, and a substrate cooling system. The water mist cooling system and the gas cooling system form a cross-shaped composite cooling structure at the lower part of the welding head, achieving directional cooling through adjustable gas nozzles and water mist nozzles. The substrate cooling system employs a three-layer composite circulation plate with an integrated S-shaped serpentine flow channel. The system integrates a distributed sensing and monitoring network and an intelligent control unit, enabling real-time monitoring and adaptive control of the temperature field during additive manufacturing. This invention solves the problems of single cooling methods and low temperature field control accuracy in existing technologies, significantly improving the stability and controllability of coaxial filament additive manufacturing quality.
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Citation Information

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