公开(公告)号：US20170326646A1

公开(公告)日：2017-11-16

申请号：US15527961

申请日：2015-11-17

Applicant: RENISHAW PLC

Inventor： Michael Joseph MCCLELLAND ,  Ravi Guttamindapalli ASWATHANARAYANASWAMY ,  Ceri BROWN

IPC: B22F3/105 ,  B33Y10/00 ,  B28B1/00 ,  B29C67/00

CPC classification number: B22F3/1055 ,  B22F2003/1057 ,  B28B1/00 ,  B29C64/153 ,  B29C67/00 ,  B33Y10/00 ,  Y02P10/295

Abstract: An additive manufacturing apparatus has a build chamber, a build platform lowerable in the build chamber such that layers of flowable material can be successively formed across the build platform, a laser for generating a laser beam, a scanning unit for directing the laser beam onto each layer to solidify the material in selected areas and a processor for controlling the scanning unit. The processor is arranged to control the scanning unit to direct the laser beam to solidify material of a layer along a scan path, the laser beam advanced along at least a section of the scan path in an opposite direction to a direction in which the laser beam is advanced along a corresponding section of a corresponding scan path of a previous layer. The scan path may be a border scan path extending around a border of one of the selected areas of the layer.

公开(公告)号：US20200070247A1

公开(公告)日：2020-03-05

申请号：US16677031

申请日：2019-11-07

Applicant: RENISHAW PLC

Inventor： Michael Joseph MCCLELLAND ,  Ceri BROWN ,  Ravi Guttamindapalli ASWATHANARAYANASWAMY

IPC: B22F3/105 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/153

Abstract: An additive manufacturing apparatus including a build chamber, build platform lowerable in the chamber so layers of flowable material can successively form across the platform, laser for generating a laser beam, scanning unit for directing the laser beam onto each layer to selectively solidify the material and a processor for controlling the scanning unit. The processor controls the scanning unit directs the laser beam to solidify a selected area of material by advancing the laser beam many times along a scan path. On each pass, the laser beam solidifies spaced apart sections of the scan path, each subsequent pass solidifying sections that are located between sections solidified on a previous pass. The processor controls the scanning unit to direct the laser beam to solidify selected area of material by solidifying sub-millimetre sized sections of non-continuously area and in an order such that consecutively solidified sections are spaced apart.

公开(公告)号：US20180010221A1

公开(公告)日：2018-01-11

申请号：US15506007

申请日：2015-09-10

Applicant: RENISHAW PLC

Inventor： Ravi Guttamindapalli ASWATHANARAYANASWAMY ,  Hossein SHEYKH-POOR ,  Peter George Eveleigh JERRARD

IPC: C22C38/44 ,  C22C38/02 ,  B23K26/342 ,  B23K26/144 ,  C22C38/42 ,  B22F9/08 ,  C22C38/04 ,  C22C38/00

CPC classification number: C22C38/44 ,  B22F3/1055 ,  B22F9/082 ,  B22F2009/0824 ,  B22F2009/0848 ,  B23K26/144 ,  B23K26/342 ,  B33Y10/00 ,  B33Y70/00 ,  C22C33/0285 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/42 ,  Y02P10/295

Abstract: A method of manufacturing a part including selective laser melting of a powder including a steel alloy containing, by weight, 16% to 19% chromium and 12.2% to 13.5% nickel, wherein the powder is substantially non-magnetic.

公开(公告)号：US20230356301A1

公开(公告)日：2023-11-09

申请号：US17777511

申请日：2020-12-14

Applicant: RENISHAW PLC

Inventor： Ravi Guttamindapalli ASWATHANARAYANASWAMY

IPC: B22F10/50 ,  B22F10/28 ,  B33Y10/00 ,  B33Y40/20 ,  B22F10/364 ,  B22F12/45

CPC classification number: B22F10/50 ,  B22F10/28 ,  B33Y10/00 ,  B33Y40/20 ,  B22F10/364 ,  B22F12/45

Abstract: A powder bed fusion additive manufacturing method in which an object is built in a layer-by-layer manner. The method includes, for each layer of a plurality of successively fused layers, melting material of the layer by irradiating the layer with one or more energy beams a first time using a first set of irradiation parameters and allowing the melted material to solidify to define a fused region of the layer and reheating the fused region by irradiating the layer a subsequent time with one or more of energy beams using a second set of irradiation parameters. The first set of irradiation parameters includes at least one different irradiation parameter to the second set of irradiation parameters.

公开(公告)号：US20180290241A1

公开(公告)日：2018-10-11

申请号：US15527676

申请日：2015-11-17

Applicant: RENISHAW PLC

Inventor： Michael Joseph MCCLELLAND ,  Ceri BROWN ,  Ravi Guttamindapalli ASWATHANARAYANASWAMY

IPC: B23K26/354 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K26/34 ,  B23K26/082

Abstract: An additive manufacturing apparatus including a build chamber, build platform lowerable in the chamber so layers of flowable material can successively form across the platform, laser for generating a laser beam, scanning unit for directing the laser beam onto each layer to selectively solidify the material and a processor for controlling the scanning unit. The processor controls the scanning unit directs the laser beam to solidify a selected area of material by advancing the laser beam many times along a scan path. On each pass, the laser beam solidifies spaced apart sections of the scan path, each subsequent pass solidifying sections that are located between sections solidified on a previous pass. The processor controls the scanning unit to direct the laser beam to solidify selected area of material by solidifying sub-millimetre sized sections of non-continuously area and in an order such that consecutively solidified sections are spaced apart.