公开(公告)号：US10933468B2

公开(公告)日：2021-03-02

申请号：US15767475

申请日：2016-11-14

Applicant: RENISHAW PLC

Inventor： Nicholas Henry Hannaford Jones ,  Ceri Brown ,  Ramkumar Revanur ,  Geoffrey McFarland

IPC: G05B19/4093 ,  B22F3/00 ,  B33Y50/02 ,  B22F3/105 ,  B33Y30/00 ,  B29C64/153 ,  B29C64/393 ,  B29C64/245 ,  B29C64/268 ,  B33Y10/00

Abstract: A method of monitoring an additive manufacturing apparatus. The method includes receiving one or more sensor signals from the additive manufacturing apparatus during a build of a workpiece, comparing the one or more sensor signals to a corresponding acceptable process variation of a plurality of acceptable process variations and generating a log based upon the comparisons. Each acceptable process variation of the plurality of acceptable process variations is associated with at least one state of progression of the build of the workpiece and the corresponding acceptable process variation is the acceptable process variation associated with the state of progression of the build when the one or more sensor signals are generated.

公开(公告)号：US10926327B2

公开(公告)日：2021-02-23

申请号：US15318115

申请日：2015-06-11

Applicant: RENISHAW PLC

Inventor： Christopher Sutcliffe ,  Ceri Brown

IPC: B29C67/00 ,  B22F3/105 ,  B33Y30/00 ,  B29C64/268 ,  B29C64/371

Abstract: An additive manufacturing apparatus including a build chamber in which an object is built and a flow device. The flow device comprises a body having a Coand{hacek over (a)} surface and a passageway connectable to a pressurised gas source. The passageway has an opening located adjacent to the Coand{hacek over (a)} surface to, in use, direct a jet of gas over the Coand{hacek over (a)} surface. A space adjacent the Coand{hacek over (a)} surface is in fluid communication with the build chamber such that gas drawn into and/or propelled from the space causes gas flow through the build chamber.

公开(公告)号：US10479018B2

公开(公告)日：2019-11-19

申请号：US15555455

申请日：2016-03-29

Applicant: RENISHAW PLC

Inventor： Ceri Brown ,  Nicholas H H Jones ,  David G J Ewing ,  Geoffrey McFarland

IPC: B29C64/153 ,  G02B26/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/20 ,  G02B26/10 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/264

Abstract: An additive manufacturing apparatus including a scanner for directing a laser beam on to layers of flowable material to selectively solidify the material to form an object in a layer-by-layer manner. The scanner includes an optical component operable under the control of a first actuator to reflect the laser beam over a first range of angles in a first dimension and the or a further optical component operable under the control of a second actuator to reflect the laser beam over a second range of angles in the first dimension, wherein the second actuator provides a faster dynamic response but a smaller range of movement of the laser beam than the first actuator.

公开(公告)号：US10335901B2

公开(公告)日：2019-07-02

申请号：US14896161

申请日：2014-06-10

Applicant: RENISHAW PLC

Inventor： Ben Ian Ferrar ,  Ceri Brown

IPC: B23K26/342 ,  B23K26/06 ,  B23K26/082 ,  B23K26/144 ,  B22F3/105 ,  B29C64/153 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02

Abstract: A selective laser solidification apparatus including; a powder bed onto which powder layers can be deposited, at least one laser module for generating a plurality of laser beams for solidifying the powder material deposited onto the powder bed, a laser scanner for individually steering each laser beam to solidify separate areas in each powder layer, and a processing unit. A scanning zone for each laser beam is defined by the locations on the powder bed to which the laser beam can be steered by the laser scanner. The laser scanner is arranged such that each scanning zone is less than the total area of powder bed and at least two of the scanning zones overlap. The processing unit is arranged for selecting, for at least one powder layers, which laser beam to use to scan an area of the powder layer located within a region wherein the scanning zones overlap.