The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2024
Filed:
Oct. 04, 2021
Lawrence Livermore National Security, Llc, Livermore, CA (US);
Seurat Technologies, Inc., Wilmington, MA (US);
Saad A. Khairallah, Livermore, CA (US);
John Roehling, Livermore, CA (US);
Yiyu Shen, Tewksbury, MA (US);
Andrew James Bayramian, Marblehead, MA (US);
Ning Duanmu, Nashua, NH (US);
James A. Demuth, Woburn, MA (US);
Lawrence Livermore National Security, LLC, Livermore, CA (US);
Seurat Technologies, Inc., Wilmington, MA (US);
Abstract
The present disclosure relates to systems and methods for performing large area laser powder bed fusion (LBPF) to form a plurality of layers of a 3D part in a layer-by-layer fashion using meltable powder particles. In one implementation the system makes use of a first light source, which may be a diode laser subsystem, for generating a first light pulse of a first duration. The first light is used to preheat a substrate underneath a new layer of powder particles, wherein the substrate is formed from a previously fused quantity of the powder particles. A second light source, which may be a pulse laser, generates a second light pulse subsequent to the first light pulse. The second light pulse has a second duration shorter than the first duration by a factor of at least about 10, and fully melts the new layer of powder particles in addition to the substrate, to achieve a smooth printed layer. The wavelength of the first light pulse also differs from a wavelength of the second light pulse.