公开(公告)号：US20220193769A1

公开(公告)日：2022-06-23

申请号：US17432216

申请日：2020-03-02

Applicant: SLM Solutions Group AG

Inventor： Andreas Hoppe ,  Christiane Thiel ,  Ann-Kathrin Otte ,  Daniel Brueck ,  Jan Wilkes ,  Dieter Schwarze

IPC: B22F10/20 ,  B33Y30/00 ,  B29C64/153 ,  B29C64/268 ,  B22F12/70 ,  B22F10/30 ,  B23K26/082 ,  B23K26/342

Abstract: The invention relates to a control method for controlling a multi-beam apparatus having one or more beam sources for producing a plurality of beams of a system for manufacturing a three-dimensional workpiece by means of an additive layer construction method, in which method a material that can be solidified in order to manufacture the three-dimensional workpiece is applied in layers to a surface of a carrier and the material that can be solidified is solidified by the plurality of beams in a respective layer at points of incidence of the plurality of beams on the material that can be solidified, wherein the points of incidence of the beams for solidifying selective regions of the layers of the material that can be solidified in order to manufacture the three-dimensional workpiece are each controlled substantially against a gas flow direction of a gas flow over the surface of the carrier; wherein the control method comprises (a) dividing the material to be solidified in the respective layer into at least two sections, wherein two of the at least two sections extend in the gas flow direction of the gas flow prevailing over the two of the at least two sections in succession at least in part, (b) dividing at least one of the two of the at least two sections into at least two surface pieces, (c) assigning each of the surface pieces to exactly one specific beam, which solidifies the material to be solidified in the assigned surface piece, (d) controlling the points of incidence of the beams such that, at at least one point in time during an exposure of the material to be solidified, the material to be solidified is solidified in at least two surface pieces, and a network consisting of straight lines extending between each center point of the points of incidence to every other center point of the points of incidence, at no point in time during the exposure, in which all center points of the points of incidence are located outside of a predetermined distance from each other, has a straight line parallel to the gas flow direction of the gas flow prevailing over the two of the at least two sections.

公开(公告)号：US11685122B2

公开(公告)日：2023-06-27

申请号：US17639093

申请日：2020-08-25

Applicant: SLM Solutions Group AG

Inventor： Dieter Schwarze ,  Kim Kulling ,  Andreas Hoppe ,  Baerbel Kratz ,  Daniel Alberts

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B22F12/90 ,  B22F10/28 ,  B22F10/368 ,  B22F10/366

CPC classification number: B29C64/393 ,  B22F10/28 ,  B22F10/366 ,  B22F10/368 ,  B22F12/90 ,  B29C64/153 ,  B33Y10/00 ,  B33Y50/02

Abstract: A device is provided, for analyzing sensor data of a sensor arranged in an apparatus for producing a three-dimensional work piece via irradiation of layers of raw material with an energy beam. Further, a corresponding method and a corresponding computer program product are provided.

公开(公告)号：US20230191699A1

公开(公告)日：2023-06-22

申请号：US17926338

申请日：2021-05-05

Applicant: SLM SOLUTIONS GROUP AG

Inventor： Gesa Rolink ,  Jiachun Chen ,  Andreas Hoppe ,  Lukas Roesgen ,  Dieter Schwarze

IPC: B29C64/282 ,  B29C64/371 ,  B29C64/393

CPC classification number: B29C64/282 ,  B29C64/371 ,  B29C64/393 ,  B33Y10/00

Abstract: We describe a method comprising: defining an irradiation section, in particular an irradiation stripe, on a material layer to be irradiated, in an additive layer manufacturing process, with an irradiation beam scanned across the material layer, and defining, within the irradiation section, two or more parallel or substantially parallel scanning vectors for said scanning of a said irradiation beam across the material layer, wherein all scanning vectors within the irradiation section are parallel or substantially parallel with respect to each other, wherein, based on said defining of the two or more parallel or substantially parallel scanning vectors, a line results which connects a first location, on the material layer, of a change in irradiation energy density of a said irradiation beam for a first one of the two or more parallel or substantially parallel scanning vectors and a second location, on the material layer, of a change in irradiation energy density of a said irradiation beam for a second one of the two or more parallel or substantially parallel scanning vectors, wherein the first scanning vector and the second scanning vector are neighboring scanning vectors, wherein a distance between the first location and the second location is smaller than (i) a distance between the first location and a third location of a change in irradiation energy density of a said irradiation beam for the second one of the two or more parallel or substantially parallel scanning vectors and/or (ii) a distance between the second location and a fourth location of a change in irradiation energy density of a said irradiation beam for the first one of the two or more parallel or substantially parallel scanning vectors, and wherein an angle, which differs from 90 degrees (a) irrespectively of a geometry of a workpiece to be produced using the additive layer manufacturing process, and (b) irrespectively of an orientation of the two or more parallel or substantially parallel scanning vectors with respect to an orientation of the irradiation section, is formed (i) between the first scanning vector and the line, and/or (ii) between the second scanning vector and the line.

公开(公告)号：US20220194011A1

公开(公告)日：2022-06-23

申请号：US17639093

申请日：2020-08-25

Applicant: SLM Solutions Group AG

Inventor： Dieter Schwarze ,  Kim Kulling ,  Andreas Hoppe ,  Baerbel Kratz ,  Daniel Alberts

IPC: B29C64/393 ,  B29C64/153 ,  B22F10/28 ,  B22F10/366 ,  B22F10/368 ,  B22F12/90 ,  B33Y10/00 ,  B33Y50/02

Abstract: A device is provided, for analyzing sensor data of a sensor arranged in an apparatus for producing a three-dimensional work piece via irradiation of layers of raw material with an energy beam. The device comprises a control unit configured to receive the sensor data as a time series of data values. Each data value is indicative of a process condition within the apparatus during producing the three-dimensional work piece. The control unit is further configured to receive planning data for the three-dimensional work piece. The planning data defines a plurality of scanning vectors and a sequence according to which the energy beam is scanned along the scanning vectors. The control unit is further configured to associate data values of the time series to corresponding vector data of the scanning vectors of the planning data to form a plurality of sets of data values for corresponding scanning vectors and to define, based on the planning data, a group of at least two scanning vectors among the plurality of scanning vectors. The scanning vectors of the group meet a predefined similarity criterion. The control unit is further configured to compare the set of data values of a first scanning vector of the group to the set of data values of at least one second scanning vector of the group or to a combined set of data values derived from at least two second scanning vectors of the group, and to determine, based on the comparing, a quality measure of the work piece at a position of the first scanning vector. Further, a corresponding method and a corresponding computer program product are provided.