Additive manufacturing method and additive manufacturing apparatus

By using a first and second squeegee in conjunction with powder layers of different thicknesses in SLM molding technology, and combining it with multi-laser beam scanning, the problem of roughness on the outer surface of the parts was solved, and a highly efficient printing effect was achieved.

CN121755734BActive Publication Date: 2026-06-16SHANGHAI HANBANG UNITED 3D TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI HANBANG UNITED 3D TECH CO LTD
Filing Date
2026-03-02
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In existing SLM molding technology, the presence of large powder particles results in poor surface roughness of the parts, and traditional methods are inefficient at improving surface condition.

Method used

The first and second scrapers on the powder spreading arm work together with powder spreading layers of different thicknesses, and the first, second and third laser beams scan the inner filling and contour structure respectively to achieve multi-layer printing.

Benefits of technology

While ensuring the surface roughness of the parts, printing efficiency and print quality are significantly improved.

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Abstract

The application provides an additive manufacturing method and an additive manufacturing device. The additive manufacturing method comprises the following steps: providing a powder spreading arm, the powder spreading arm is provided with a first scraper and a second scraper; the powder spreading arm starts to move, the first scraper is located at the front side of the second scraper along the moving direction of the powder spreading arm; the first scraper moves to form a first powder layer; a first laser beam is used to scan the profile of the first powder layer to form a first profile structure, the layer thickness of the first powder layer is a first layer thickness; when the second scraper passes through the first profile structure, the first profile structure and the unswept area of the first powder layer are covered with powder to form a second powder layer together with the first powder layer, the layer thickness of the second powder layer is a second layer thickness, and the second layer thickness is greater than the first layer thickness. The additive manufacturing device comprises a base plate, a powder spreading system and a laser system. The powder spreading system comprises a first scraper and a second scraper. The laser system can emit a first laser beam, a second laser beam and a third laser beam respectively.
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Citation Information

Patent Citations

  • Powder spreading system and additive manufacturing equipment

    CN115609919A

  • Powder laying type multi-laser additive and subtractive composite manufacturing method

    CN120347222A