Liquid nitrogen rapid cooling device for metal additive manufacturing

The adjustable liquid nitrogen nozzle system solves the problem of uneven cooling in fixed nozzles, achieving full-coverage uniform cooling in the metal additive manufacturing process, thus improving molding quality and cooling efficiency.

CN122099375APending Publication Date: 2026-05-29BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Filing Date
2026-04-17
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The nozzles of existing liquid nitrogen rapid cooling devices for metal additive manufacturing have a fixed structure, which makes it difficult to adapt to complex workpiece shapes, resulting in uneven cooling and insufficient local cooling.

Method used

An adjustable liquid nitrogen nozzle system is adopted, which uses a servo motor to drive a threaded rod and a drive motor in conjunction with a telescopic rod to achieve vertical and horizontal position adjustment of the liquid nitrogen nozzle, adapting to the workpiece contour and ensuring full coverage and uniform cooling.

Benefits of technology

It achieves full coverage and uniform rapid cooling of liquid nitrogen nozzles, improving the forming quality and cooling efficiency of metal additive manufacturing, and solving the problems of uneven cooling and insufficient local cooling.

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Abstract

The application discloses a liquid nitrogen rapid cooling device for metal additive manufacturing and belongs to the technical field of additive manufacturing equipment, and the technical scheme points of the application comprise a printer body, a liquid nitrogen generating device is bolted to the left side of the printer body, and an adjusting mechanism is arranged in the printer body; the adjusting mechanism comprises a fixed plate, a servo motor is bolted to the top of the fixed plate, a threaded rod is fixedly connected to the bottom of the servo motor, an adjusting block is threadedly connected to the surface of the threaded rod, an adjusting frame is fixedly connected to the front side of the adjusting block, and a sliding groove is formed in the inner wall of the adjusting frame, so that the liquid nitrogen rapid cooling device matched with the existing metal additive manufacturing can be solved, the spray head of the liquid nitrogen rapid cooling device is mainly designed in a fixed structure, in the actual printing process, due to the complex and changeable shape profile of the formed workpiece, the fixed spray head is difficult to realize uniform and adaptive cooling coverage, and problems, such as insufficient cooling in local areas and uneven cooling effect, are caused.
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