WO2018055345A1 - Fabrication additive améliorée - Google Patents

Fabrication additive améliorée Download PDF

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Publication number
WO2018055345A1
WO2018055345A1 PCT/GB2017/052759 GB2017052759W WO2018055345A1 WO 2018055345 A1 WO2018055345 A1 WO 2018055345A1 GB 2017052759 W GB2017052759 W GB 2017052759W WO 2018055345 A1 WO2018055345 A1 WO 2018055345A1
Authority
WO
WIPO (PCT)
Prior art keywords
feed material
cavity
layer
powder
sintered
Prior art date
Application number
PCT/GB2017/052759
Other languages
English (en)
Inventor
Matthew Trevelyan WEBB-MARTIN
Jason VERIC
Original Assignee
Bae Systems Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP16275140.8A external-priority patent/EP3299098A1/fr
Priority claimed from GBGB1616080.6A external-priority patent/GB201616080D0/en
Application filed by Bae Systems Plc filed Critical Bae Systems Plc
Publication of WO2018055345A1 publication Critical patent/WO2018055345A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/46—Radiation means with translatory movement
    • B22F12/47—Radiation means with translatory movement parallel to the deposition plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/64—Treatment of workpieces or articles after build-up by thermal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/20—Cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/44—Radiation means characterised by the configuration of the radiation means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/49—Scanners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • This invention relates to additive layer manufacturing (ALM) and in particular to a method to minimise residual thermal stress in a component manufactured by powder fed ALM processes, and objects formed therefrom.
  • ALM additive layer manufacturing
  • additive manufacturing or additive layer manufacturing (ALM) is a collective term for a group of different manufacturing processes that are able to produce functional parts in a layer-wise manner, without moulds or dies. These processes use a heat or light energy source such as a laser beam or a welding arc to melt, sinter or cure a feed material in the form of powder, liquid or wire in a controlled manner. Subsequent layers are built up upon each preceding layer in a vertical direction. Unlike conventional machining processes, these computer-aided manufacturing (CAM) technologies build complete parts or, alternatively, build features on existing components, by adding material rather than by removing it.
  • CAM computer-aided manufacturing
  • Laser Powder Bed technology uses the laser to sinter metallic or polymer powder contained in a build chamber. Each time a layer of the component is sintered within the build chamber, a new layer of powder is introduced from the powder feed bed, the surface of which is levelled off so as to cover the surface of the work piece with a defined layer thickness. The laser is then scanned over the fresh powder covering the work piece along a defined path which creates a cross- section shape of the component to be manufactured. Powder is sintered to this shape and solidifies to a layer of material on the work piece in the desired shape. The powder is then re-levelled, slightly higher, and the process is repeated until the component has been fully formed.
  • the laser beam is directed at a piece of starting material or "parent plate” to create a weld pool in the parent plate to which the powder is added.
  • the powder is carried to the focal point of the laser in a precisely directed carrier gas such as Argon.
  • the laser and material deposition head is then traversed across the parent plate until an entire layer is built up, whereby the head moves upwards one layer in height and continues to deposit material in the same manner. It is a problem with these methods of manufacturing that due to the highly focussed beam of the laser, the work piece is subject to intense localised heating. This heating creates steep thermal gradients in the work piece between the feed material being sintered and the cooler material which surrounds it.
  • CBL critical buckling load
  • the present invention provides a three dimensional object formed by laser powder additive layer manufacture, wherein said object is formed from a plurality of sintered material layers of a feed material, wherein said object comprises at least one formed cavity, said cavity substantially filled with a filler material, wherein the filler material is the feed material in its unsintered state
  • the feed material is an unsintered material and may be selected from a metal powder, curable ceramic powder, or curable polymer powder.
  • the feed material is a solidifyable material.
  • the feed material may be in a first state, and when exposed to a high energy stimulus, such as, for example heat, radiation, laser, UV, electron beam, causes transformation the material to a second cured or solidified state.
  • the formed at least one cavity is a is purposefully formed void or blind hole, cavity within the ALM three dimensional 3D object. It is well understood that the manufacture of very thick components by
  • ALM methods such as, for example laser sintering results in increased residual stresses, as discussed above.
  • the object formed is not load bearing, it is known to substitute thick sections with walls of thin cross section, to reduce the stress within the object, typically introducing a passage to allow the powder contained within the component to exit / be removed.
  • the absence of material inside the ALM manufactured component significantly reduces the structural performance of the object, therefore making the use of an object with a formed cavity only suitable for non-load bearing or cosmetic uses.
  • a solid section may be replaced by a lattice or honeycombed like structure, typically created through proprietary software, which can prove difficult and cost ineffective to design and simulate using, for example FEA.
  • the filler material may be selected from any suitable material such as a metal, curable monomer, polymer, rubber, metalloid, curable ceramic feed material (substantially unsintered).
  • the filler is the feed material, such that during the ALM process, portions of the feed material are selectively not sintered and are left substantially in their original first state, (unsintered) thereby the ALM process forms the object and the formed cavity is filled layer-wise with the feed material in its first state.
  • the final stages of the ALM process may then provide the complete encapsulation of the filled formed cavity, to create the final object.
  • the feed material in its first state may be wholly or partially unsintered material which is being selectively sintered by the laser, due to the heat buildup within the work part.
  • the filler material when selected from the feed material may become partially sintered to the material directly sintered by laser, but only at the boundries with the wall that define the cavity.
  • the cavity may be fully formed to the desired depth, as a blind formed cavity ie blind hole and the ALM process stopped, so as to allow the blind formed cavity to be filled with the filler material.
  • This method allows the formed cavity to be more easily filled with a filler material that is not the same as the feed material.
  • the object is typically of a 3D polygonal shape, preferably the at least one cavity has substantially the same polygonal shape as the object, further where there are at least two cavities, or a plurality of cavities they may collectively have substantially the same polygonal shape as the object.
  • edges and/or corners of the at least one cavity comprises radius shaped edges.
  • the at least one cavity is defined by walls, said walls create the bulk of the material within the object to be formed, in a further arrangement the wall or walls of the cavity which has the minimum dimension may be substantially semi-circular in cross-section.
  • the object has a substantially 3 D polygonal shape, and where there is a longest dimension the at least two cavities may be stacked along the plane defined by the longest dimension.
  • the object has 3D polygonal shape with a minimum dimension, preferably the at least two cavities are arranged in a single layer along the plane defined by said minimum dimension, such that they are substantially only one cavity along said dimension.
  • the metallic powder contained within the cavities may partially sinter but perform the task of reducing the thermal loading within the 3D object and therefore the residual stresses that are a causation of geometrical and mechanical defects.
  • the orientation of the stress-relieving cavities should depend upon the expected load case for the thick section. Load paths, particularly tensile and flexural loads should be directed through fully sintered material.
  • the object may now be formed of both thin and thick sections, and therefore the use of filled formed cavities may be applied to sections where thickness of the object exceeds that which can be reliably laser sintered.
  • the formed at least one cavity or plurality of cavities have a total dimension which is less than 40% of the corresponding dimension of the object, more preferably the formed cavities have a total dimension which is in the range of 20% to 30% of the corresponding dimension of the object.
  • the at least one cavity is defined by walls which create the object, wherein the walls of said at least one cavity or plurality of cavities have a total dimension which is at least 40% of the corresponding dimension of the object, more preferably the walls have a dimension which are in the range of 50% to 60% of the corresponding volume of the object.
  • the preferred techniques for powder feedstock are: blown powder and powder bed. These techniques typically employ a laser as the heat energy source.
  • a method of forming an object comprising a filled formed cavity, by laser powder additive layer manufacturing comprising: a) applying, by an energy source in the form of a laser, energy in the form of heat to a first portion of a surface of a feed material sufficient to sinter said first portion; b) moving the energy source to progressively form a layer of sintered material; c) causing a second portion of the surface to not be subjected to the energy source, such that said second portion comprises the feed material, d) causing the formed layer of sintered material of the first portion of the surface to cool, to bring at least part of the formed layer to a state of crystallisation, e) repeating steps a) to d) as required whereby to form the object comprising a filled cavity, wherein said filled cavity comprises the feed material.
  • the process is completed such that the feed material in a substantially un crystallised state, that is unsintered state, in the at least one cavity is entirely encapsulated.
  • the method may further comprise the step of optionally causing the object to undergo heat treatment in order to reduce residual thermal stresses whereby the feed material may become partially sintered.
  • a method of forming an object comprising a filled formed cavity, by laser additive layer manufacturing comprising: a method of forming an object comprising a filled formed cavity, by powder additive layer manufacturing, the method comprising: a) applying, by an energy source in the form of a laser, energy to a first portion of a surface of a first feed powder material sufficient to melt said first portion; b) moving the energy source to progressively form a layer of sintered material; c) causing an amount of feed material to be absent from a second portion of the surface, d) causing the formed layer of sintered material of the first portion of the surface to cool to bring at least part of the formed layer to a state of crystallisation, e) repeating steps a) b) and d) as required whereby to furnish a formed cavity in the object, f) filling the cavity with a filler material, preferably the first feed material, g) repeating steps a) to e) as
  • the delivery of the powder in step a) may be by way of inert gas blown delivery.
  • the step c) may comprise the step of removing the first feed material from a second portion of the surface.
  • the crystallisation step may be force cooled or may be allowed to reach crystallisation
  • the present invention provides additive layer manufacturing apparatus for forming an object.
  • the apparatus comprises: an energy heat source, in the form of a laser configured to apply heat to a portion of a surface of an object or layer of feed material sufficient to melt or sinter said portion.
  • the heat source being further configured to move relative to the object; a feed material delivery means configured to add feed material to the melted portion or alternatively on top of the sintered material; thereby producing an object through repetition of this process.
  • the present invention provides a computer readable medium having computer-executable instructions adapted to cause Additive Manufacturing apparatus to operate in accordance with the method of any of the above aspects.
  • Figure 1 is a schematic illustration showing an example of blown powder
  • Figure 2 shows a top isometric view of an object with 4 cavities filled with filler material
  • Figure 3 shows a top isometric view of an object with 4 cavities
  • Figure 4 shows a method of forming layers and in-situ filling of the formed cavity
  • Figure 5 shows a method of forming a formed cavity and filing with a filler material
  • Figure 6 provides a powder bed method of manufacture.
  • Additional Manufacturing is used herein to refer to all additive processes that may be used to produce components or assemblies, layer by layer, without moulds or dies e.g. by melting, sintering, bonding or curing material typically in the form of a powder, wire or liquid feedstock.
  • the process typically uses a heat or light energy source such as a laser beam, electron beam, electrical heater or electric welding arc to melt or sinter etc. an amount of that material and deposit the material (e.g. on a base plate/work piece), and subsequently build layers of material upon each preceding layer.
  • Additive Manufacture may also be known inter alia as 3D printing, Direct Digital Manufacturing (DDM), Digital Manufacturing (DM), Additive Layer Manufacturing (ALM), Rapid Manufacturing (RM), Direct Manufacturing, Freeform Fabrication.
  • Figure 1 is a schematic illustration (not to scale) showing the AM apparatus 18 being used to create the portions of the object 4 by performing an AM process to add layers 32.
  • the AM apparatus 18 comprises a heat source in the form of a high powered laser 20, a source of metallic material in the form of a powder delivery system 22.
  • the laser 20 may be any appropriate type of laser, for example, an Nd:YAG laser that may operate at a wavelength of 1064nm, and have a continuous wave power output of, e.g. 500W, >1 kW, or greater, etc.
  • the laser 20 is focused upon a focal point 24 on the first surface 40 of the portion of the object 4 which is to be formed, whereby to melt the first surface 40 to form a weld pool.
  • the laser 20 is controlled by a computer (not shown in the Figures) to deliver a laser beam optionally via an optical fibre 28 to conventional focussing optics 30 which focus the laser beam to the focal point 24 on the first surface 40 of the object 4.
  • the powder delivery system 22 delivers powder to the vicinity of the laser focal point 24. Thus, the powder is fully melted as it is deposited on the first surface 40 to form a layer 32 of sintered material.
  • the powder is a stainless steel 316 powder.
  • the powder grains may, for example, have a diameter between 36 pm and 106 pm.
  • the powder delivery system 22 delivers powder through a deposition nozzle 34 along a plurality of delivery lines 36 which may be disposed symmetrically around the deposition nozzle 34.
  • a different type of material e.g. a different type of metallic power e.g. Aluminium AISM OMg powder
  • the AM apparatus 18 is moveable under the control of the computer in the X-Y plane that is parallel to the first surface 40 of the object 4, and vertically in the Z direction that is orthogonal to the first surface 40 of the object 4.
  • the laser focal point 24 may be directed to any point in a working envelope in the X-Y plane and vertically so as to accommodate both work pieces of different height and also regions of different height within work pieces.
  • the AM apparatus 18 moves in a traverse direction, relative to the object 4, which is indicated by an arrow 38
  • the layer 32 is cooled to a crystallised state using the forced cooling gas nozzle e.g. using air or a cryogenic spray jet.
  • Regions (not shown) are not subjected to the laser to form the cavity (not shown).
  • AM apparatus 18 for performing an AM process is provided.
  • the above described methods and apparatus advantageously implement powder AM processes to produce objects with thick sections.
  • Additive manufacturing methods above may be employed to produce objects with enhanced load bearing and characteristics when compared to prior art ALM processes.
  • objects e.g. structural components
  • Additive manufacturing methods above may be employed to produce objects with enhanced load bearing and characteristics when compared to prior art ALM processes.
  • objects e.g. structural components
  • FIG 2 there is a three dimensional object 50, which has been built up from a plurality of layers.
  • the multiplicity of layers have provided the main body 51 of the object 50 and where the ALM process has purposefully omitted the solidification process it has furnished formed cavities 52, which are filled with a filler material 53. Further layers will be added on top of the formed cavities 52, to provide sintered outer layers (shown generally at 54).
  • FIG 3 there is a three dimensional object 60, which has been built up from a plurality of layers.
  • the multiplicity of layers have provided the main body 61 of the object 60 and where the ALM process has purposefully omitted the solidification process it has furnished formed cavities 62, which is to be filled with a filler material. Further layers will be added on top of the formed cavities 62, once they have been filled, to provide sintered outer layers (shown generally at 64).
  • a first sintered layer 102 has a layer of sintered material 103a deposed thereon.
  • An energy source 106 impinges on the surface of feed material 103a to form a sintered material 104a. Regions where the energy source is purposefully omitted allow portions of feed material 103a to remain, and is contained within the walls formed by sintered material 104a.
  • a further layer of feed material 103b is deposed thereon, further energy is supplied to form regions of sintered material 104b.
  • the energy source is purposefully omitted allow portions of feed material 103a and 103b to remain. This is repeated to form n layers, with portions of feed material 103n and portions of sintered material 104n.
  • step e) a yet further layer of feed material 103c is deposed thereon, the layer is sintered to form a complete solidified outer layer 104c, thereby creating a cavity filled with feed material 103a and 103b.
  • a first sintered layer 1 12 has a layer of feed material 1 13a deposed thereon.
  • An energy source 1 16 impinges on the surface of feed material 1 13a to form a sintered material 1 14a. This is repeated for feed material 1 13b to form a sintered material 1 14b , This is repeated to form n layers, with portions of feed material 1 13n and portions of sintered material 1 14n. Regions where the energy source 1 16 and feed material 1 13a are purposefully omitted furnishes formed cavity 1 17
  • step c) a filler material 1 18 is deposed in the formed cavity 1 17.
  • step d) a yet further layer of feed material 1 13c is deposed thereon, the layer is sintered to form a complete sintered outer layer 1 14c, thereby creating a cavity 1 17 filled with filler material 1 18.
  • Figure 6 is a schematic illustration (not to scale) showing the AM apparatus 210 being used to create an object 221 by sintering of a feed material 220 which is delivered in layers by roller 214 from feed beds 215 and 216.
  • the feed material 220 is powdered metallic material and is contained within feed beds 215 and 216.
  • the AM apparatus 210 comprises a heat source in the form of a high powered laser 21 1 .
  • the laser 21 1 may be any appropriate type of laser, for example, an Nd:YAG laser that may operate at a wavelength of 1064nm, and have a continuous wave power output of, e.g. 200W, 500W etc.
  • the laser 21 1 is directed to incidence point 219 on the surface of the portion of the object 221 which is to be formed, whereby to sinter the surface layer.
  • the laser 21 1 is controlled by a computer (not shown in the Figures) to deliver a laser beam through focussing optics 212 and via a directing mirror to direct the focussed laser beam on the surface of feed material 220.
  • the laser sinters the powder after it is deposited on the uppermost surface to form a layer of solid material.
  • the powder is a stainless steel 316 powder, other common example is Aluminium AISM OMg powder.
  • the powder grains may, for example, have a diameter between 30 pm and 1 10 pm.
  • the powder delivery beds 215,216 are raised by mechanisms 217, 218 in an alternating manner and delivery roller 214 delivers powder to build bed 220 .
  • the AM apparatus 210 is under the control of a computer to control movements of the laser in the X-Y plane, which is parallel to the first surface of the object 221.
  • the laser focal point 219 may be directed to any point in a working envelope in the X-Y plane and the build bed may move vertically in the Z axis by varying amounts so as to accommodate both work pieces of different heights and also regions of different heights within work pieces.
  • the build bed is typically heated and layers are laid down on top of each other to form the object 221 . Regions (not shown) are not subjected to the laser to form the cavity (not shown).
  • additive manufacturing methods above may be employed to produce objects with enhanced load bearing and characteristics when compared to prior art ALM processes.
  • objects e.g. structural components

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)

Abstract

La présente invention concerne la fabrication additive (FA) et, en particulier, un procédé en vue de réduire au minimum la contrainte thermique résiduelle dans un élément fabriqué par des procédés FA alimentés par poudre, et des objets ainsi formés. L'invention porte également sur un objet tridimensionnel formé par fabrication additive, ledit objet étant formé à partir d'une pluralité de couches de matériau fritté d'un matériau d'alimentation, ledit objet comprenant au moins une cavité formée, ladite cavité étant sensiblement remplie d'un matériau de remplissage.
PCT/GB2017/052759 2016-09-21 2017-09-18 Fabrication additive améliorée WO2018055345A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP16275140.8 2016-09-21
EP16275140.8A EP3299098A1 (fr) 2016-09-21 2016-09-21 Production additive amelioree
GB1616080.6 2016-09-21
GBGB1616080.6A GB201616080D0 (en) 2016-09-21 2016-09-21 Improved additive layer manufacturing

Publications (1)

Publication Number Publication Date
WO2018055345A1 true WO2018055345A1 (fr) 2018-03-29

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PCT/GB2017/052759 WO2018055345A1 (fr) 2016-09-21 2017-09-18 Fabrication additive améliorée

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WO (1) WO2018055345A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090258168A1 (en) * 2008-04-15 2009-10-15 Rolls-Royce Plc Article and method of manufacture thereof
DE102010046579A1 (de) * 2010-09-25 2012-03-29 Mtu Aero Engines Gmbh Bauteil mit wenigstens einem Dämpfungselement und Verfahren zum Herstellen eines Bauteils mit wenigstens einem Dämpfungselement
EP2551040A1 (fr) * 2011-07-25 2013-01-30 EADS Deutschland GmbH Procédé de fabrication de composant par pression isostatique à chaud
EP2910324A2 (fr) * 2014-02-25 2015-08-26 General Electric Company Procédé de fabrication d'un objet tridimensionel à l'aide de poudres
CN105127426A (zh) * 2015-09-30 2015-12-09 广西科技大学 一种三维结构组合烧结加工方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090258168A1 (en) * 2008-04-15 2009-10-15 Rolls-Royce Plc Article and method of manufacture thereof
DE102010046579A1 (de) * 2010-09-25 2012-03-29 Mtu Aero Engines Gmbh Bauteil mit wenigstens einem Dämpfungselement und Verfahren zum Herstellen eines Bauteils mit wenigstens einem Dämpfungselement
EP2551040A1 (fr) * 2011-07-25 2013-01-30 EADS Deutschland GmbH Procédé de fabrication de composant par pression isostatique à chaud
EP2910324A2 (fr) * 2014-02-25 2015-08-26 General Electric Company Procédé de fabrication d'un objet tridimensionel à l'aide de poudres
CN105127426A (zh) * 2015-09-30 2015-12-09 广西科技大学 一种三维结构组合烧结加工方法

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