公开(公告)号：US20190240775A1

公开(公告)日：2019-08-08

申请号：US15888815

申请日：2018-02-05

Applicant: General Electric Company

Inventor： Michael Evans GRAHAM ,  Lang YUAN ,  Thomas ADCOCK ,  Justin GAMBONE, JR. ,  James SEARS ,  John MADELONE

IPC: B23K26/08 ,  G05B19/4099 ,  B33Y50/02 ,  B23K26/354 ,  B23K26/34 ,  B23K26/082

Abstract: A method includes applying thermal and/or strain modeling to the CAD representation of an object. In addition, scan path data is generated based at least in part on a result of the thermal and/or strain modeling. A build file comprising the scan path data is generated. The build file comprises instructions that configure an additive manufacturing tool to generate the object according to the scan path data.

公开(公告)号：US20200276667A1

公开(公告)日：2020-09-03

申请号：US16288512

申请日：2019-02-28

Applicant: General Electric Company

Inventor： Robert John FILKINS ,  Subhrajit ROYCHOWDHURY ,  Juan BORJA ,  Thomas ADCOCK

IPC: B23K26/06 ,  B22F3/105 ,  B22F1/00 ,  B29C64/153 ,  B33Y10/00 ,  B29C64/268

Abstract: A system includes a first group of optic lenses within a focusing unit positioned along the propagation direction of a collimated laser beam, the first group of optic lenses separated by a predetermined fixed distance. The first group of optic lenses in conjunction cause the collimated beam to form as an annular beam as it passes through the first group of optic lenses. An axicon lens located distal from the first group of optic lenses along the propagation direction, the axicon lens operable to bifurcate the annular beam into two deflected collimated beam sections, and the axicon lens having a focus that causes the two deflected collimated beam sections to merge at a distance distal from the axicon lens to create an interference pattern region.

公开(公告)号：US20200276764A1

公开(公告)日：2020-09-03

申请号：US16289076

申请日：2019-02-28

Applicant: General Electric Company

Inventor： Brian Scott MCCARTHY ,  Dean Andrew SNELLING, JR. ,  Thomas ADCOCK ,  Donnell CREAR ,  Michael Evans GRAHAM

IPC: B29C64/393 ,  B22F3/105 ,  B29C64/153 ,  B29C64/268

Abstract: A system for additive manufacturing machine energy beam alignment error compensation includes, a calibration table having x-y planar offsets to correct laser alignment errors representing energy beam positional offsets between beam-steering commanded energy beam locations and fiducial marks generated on a burn-paper, a recoater mechanism that distributes successive layers of powder, one or more sensors monitoring the powderbed surface proximal to the beam scan unit, and a processor unit configured to perform a method. The method including collecting sensor data representing height variations across at least a portion of the powderbed surface, deriving dimensional data from the collected data, analyzing the dimensional data to determine a distribution of differences between the powderbed surface and a reference plane containing the burn-paper when the fiducial marks were generated, and calculating z-axis calibration offset points for inclusion in the calibration table x-y planar offsets. A method and a non-transitory medium are also disclosed.