EP4142970A1 - Stratégie d'exposition à un rayonnement d'une structure fabriquée de manière additive et pouvant être refroidie - Google Patents

Stratégie d'exposition à un rayonnement d'une structure fabriquée de manière additive et pouvant être refroidie

Info

Publication number
EP4142970A1
EP4142970A1 EP21731710.6A EP21731710A EP4142970A1 EP 4142970 A1 EP4142970 A1 EP 4142970A1 EP 21731710 A EP21731710 A EP 21731710A EP 4142970 A1 EP4142970 A1 EP 4142970A1
Authority
EP
European Patent Office
Prior art keywords
layer
component
irradiation
vectors
irradiation vectors
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21731710.6A
Other languages
German (de)
English (en)
Inventor
Johannes Albert
Ole Geisen
Oliver HERMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP4142970A1 publication Critical patent/EP4142970A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
    • 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
    • B22F10/80—Data acquisition or data processing
    • B22F10/85—Data acquisition or data processing for controlling or regulating additive manufacturing processes
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/009—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine components other than turbine blades
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/04—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/004—Article comprising helical form elements
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • 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

  • the present invention relates to a method for providing manufacturing instructions, in particular instructions for selective irradiation in additive manufacturing, and a corresponding additive manufacturing method.
  • the method for providing manufacturing instructions may be a computer-aided manufacturing (CAM) method.
  • the component is preferably provided for use in the hot gas path of a gas turbine, such as a stationary gas turbine.
  • the component structure particularly preferably relates to a component of a combustion chamber or a resonator component such as a Helmholtz resonator or a part thereof.
  • the component may be another coolable or partially porous component, such as one used for automotive or aerospace applications.
  • the component is preferably a component to be cooled, for example it can be cooled via fluid cooling.
  • the component preferably has a tailor-made permeability for a corresponding cooling fluid, for example cooling air.
  • Modern gas turbines are subject to constant improvement in order to increase their efficiency. However, this leads, among other things, to ever higher temperatures in the hot gas path.
  • the metallic materials for rotor blades, especially in the first stages, are constantly being considered in terms of their strength at high temperatures, creep loads and thermomechanical fatigue.
  • Additive manufacturing processes include, for example, selective laser melting (SLM) or laser sintering (SLS) or electron beam melting (EBM) as powder bed processes.
  • SLM selective laser melting
  • SLS laser sintering
  • EBM electron beam melting
  • Other additive processes are, for example, "Directed Energy Deposition (DED)” processes, in particular laser build-up welding, electron beam or plasma powder welding, wire welding, metal powder injection molding, so-called “sheet lamination” processes, or thermal spraying processes (VPS LPPS, GDCS).
  • DED Directed Energy Deposition
  • a method for selective laser melting is known, for example, from EP 2601 006 Bl.
  • Nes component can be carried out radiation parameters largely on the basis of a corresponding CAD file and the choice of appropriate manufacturing and / or Be.
  • a CAD file or a corresponding computer program or computer program product can, for example, as a (volatile or non-volatile) storage medium, such as a memory card, a USB stick, a CD-ROM or DVD, or in the form of a downloadable file from a server and/or provided or included in a network. Thieves- provision can also be made, for example, in a wireless communication network by transferring a corresponding file with the computer program.
  • a computer program (product) may include program code, machine code or numerical control instructions such as G-code and/or other executable program instructions in general.
  • LPBF powder bed-based method
  • Laser Powder Bed Fusion advantageously enables the implementation of new geometries, concepts, solutions and/or design, which reduce the manufacturing costs or the construction and throughput times, optimize the manufacturing process and, for example, improve a thermo-mechanical design or the durability of the components.
  • Blade components manufactured in a conventional way, for example by casting are significantly inferior to the additive manufacturing route in terms of their design freedom and also in relation to the required throughput time and the associated high costs and manufacturing effort.
  • powder bed-based methods such as selective laser melting or electron beam melting also offer the possibility of producing porous structures in a targeted manner through parameter settings or variations.
  • the so-called hatching distance is an important parameter in the area-like (selective) irradiation or exposure of a powder layer by an energy beam, such as a laser or electron beam, which has a special influence on the structure or structure obtained. Porosity of the layer or the component has.
  • the permeability By setting a certain porosity in the material, there is still a technically controllable permea- stability, which can be used, for example, for particularly effective cooling of the resulting structure or component.
  • the permeability, the ability for the cooling fluid to flow through or the permeability can also vary depending on the direction in which the structure is built up and the direction of flow. The permeability is particularly dependent on parameters.
  • the irradiation power, the scanning speed, the beam focus and the layer thickness can also have an impact on the structure obtained and its porosity.
  • the laser power correlates strongly with a melt pool depth, i.e. the dimension that describes the expansion of an initially liquid and then solidifying structure downwards into the powder bed during powder consolidation.
  • a variation of the hatching spacing has a significant influence on the flowability or porosity of a structure along its build-up direction, usually the vertical (z-direction). If, on the other hand, the energy input is reduced, for example, a flattened melt pool is formed, which results in relatively large lateral porosity.
  • An additive manufacturing method and corresponding system, comprising circular radiation paths is known, for example, from EP 3406 370 A1.
  • the method for producing a three-dimensional object and a corresponding component with a specially fabricated porosity is known, for example, from WO 2014/202352 A1.
  • an additively manufactured porous structure can be used in a targeted manner to develop advantageous permeability and thus to achieve a controlled and significantly more efficient cooling effect. It is therefore an object of the present invention to expand the area of application of additive manufacturing technologies to the components described or to use material and manufacturing characteristics of additive technologies in a targeted manner for structural advantages and design optimization of the components. This means that not only the conventionally known advantages of additive technologies can be used to advantage. Contrary to the common view in the professional world, according to which the structure achieved additively is weaker and not yet comparable to that of conventionally manufactured components, an improved structure can even be reproducibly achieved in the present case.
  • One aspect of the present invention relates to a method for providing manufacturing instructions for the powder bed-based additive manufacturing of a component.
  • Vorzugswei se the manufacturing instructions relate to the process preparation of the actual manufacturing process, in particular means of the so-called “Computer-Aided-Manufacturing” (CAM).
  • CAM Computer-Aided-Manufacturing
  • the method includes the provision of first radiation vectors for a layer to be produced additively, which, when correspondingly irradiated by an energy beam, in particular a laser or electron beam, causes an (at least partially) porous structure of the layer along the corresponding vector or path.
  • the radiation vectors mentioned are preferably chosen to be the same or of the same kind and can form a first radiation pattern.
  • the radiation vectors mentioned preferably represent so-called hatching vectors. Alternatively, they can be contour vectors.
  • Said layer to be produced additively preferably relates to a previously prepared raw material layer made of powder in a standard manner, the selective irradiation of which leads to the formation of a part of a component cross section.
  • the method also includes providing the named or similar first irradiation vectors for a layer that follows (next) layer to be produced additively in such a way that paths of a porous structure of the layer and the following layer overlap at least partially or slightly in the layer plane in order to To enable flow through the (completely) manufactured component along or at an angle to its assembly direction.
  • Said (after the first-mentioned layer) following or next layer is preferably an immediately following layer.
  • the paths mentioned are intended to denote the course of the irradiation vectors for producing the porous structure in at least some areas of the component.
  • the component can be traversed by porous structure profiles through an appropriate selection of the radiation vectors or paths.
  • the means described can advantageously be used to produce a permeable component structure or one through which a flow can flow along and also at an angle to a construction direction of the component (cf. vertical Z-direction).
  • component properties can already be defined during process preparation, which allow subsequent flow through the component for efficient cooling during its intended operation.
  • the degrees of freedom gained in this way can significantly increase the cooling effect of the entire component and also expand its thermal range of application. In the case of turbine components, this also allows the use of higher combustion temperatures and greater energy efficiency of the entire turbomachine.
  • the method is or includes a CAM method.
  • irradiation vectors of the slice and the following slice overlap in the slice plane by an amount that is smaller than a lateral extension of the paths.
  • the radiation vectors of the layer and the following layer completely overlap in the layer plane.
  • the first irradiation vectors of the following slice are offset relative to the first irradiation vectors of the (previous) slice, preferably linearly or translationally.
  • the corresponding first radiation vectors of the layer can also be offset relative to the following layer.
  • Such an offset can be individually adjusted and tailored according to the design requirements of the component and a thermal load situation, and advantageously allows tailored cooling, even of individual areas of the component.
  • the first irradiation vectors of the following slice are twisted or rotated relative to the first irradiation vectors of the (previous) slice. This is particularly the case with rotationally symmetrical or cylindrical term components useful and / or advantageous when choosing a curved or circular course of irradiation.
  • an irradiation power or a radiation power density of the first irradiation vectors e.g. B. relative to a standard set of parameters for the formation of a full material structure - reduced.
  • an irradiation speed of the first irradiation vectors is increased relative to standard parameters for forming a solid material structure.
  • a porous structure of the layer or of a corresponding component cross-section of the component can likewise be brought about particularly advantageously by this measure.
  • second irradiation vectors are provided for irradiating the layer to be produced additively and/or in the following layer to be produced additively, which cause a dense structure of the corresponding layer or the corresponding component area.
  • a dense structure should preferably refer to a largely non-porous structure, in particular a solid material.
  • the component is to be provided with sufficient mechanical stability or corresponding structural properties that are just not permeable as a result of this configuration.
  • the first irradiation vectors represent a plurality of parallel irradiation vectors of a (each) layer for the component, which, according to the design requirements, are to be equipped with porous properties.
  • the first irradiation vectors represent a plurality of radially or radially symmetrical fenden irradiation vectors of a corresponding component layer, the first irradiation vectors of the following layer being twisted or rotated relative to the first irradiation vectors of the layer.
  • further irradiation vectors are provided and/or used, which represent a plurality of, in particular largely, concentric irradiation vectors of a corresponding layer for the component, and the further irradiation vectors produce an at least partially porous structure.
  • other irradiation parameters can preferably be selected for the further irradiation vectors, which, however, are also expediently suitable for forming a porous structure.
  • the structure of the component can be further varied in certain areas and accordingly adapted to a corresponding thermo-mechanical load situation.
  • the further irradiation vectors for the said layer and the following layer are provided, with the further irradiation vectors of the following layer being offset radially relative to the further irradiation vectors of the layer.
  • a further aspect of the present invention relates to a method for the additive manufacturing of the component by selective laser melting, selective laser sintering or electron beam melting.
  • the manufacturing instructions for the layer to be produced additively are specified in a first component area of the component, and in a second component area, different from the first component area, defines further manufacturing instructions which differ from the manufacturing instructions mentioned.
  • a further aspect of the present invention relates to a component which - as described above - can be produced or produced, the component being a component to be cooled of the hot gas path of a turbomachine, such as a turbine blade, a heat shield component of a combustion chamber and/or a resonator component.
  • a turbomachine such as a turbine blade, a heat shield component of a combustion chamber and/or a resonator component.
  • Another aspect of the present invention relates to a computer program or computer program product, comprising the manufacturing instructions, as described above, wherein the computer program product when executing a corresponding program by a computer, for example for controlling and/or programming a build processor and/or a Irradiation device of an additive manufacturing system, cause these means to carry out the manufacturing of the component as described above.
  • Configurations, features and/or advantages that relate to the method for providing manufacturing instructions or the computer program product can also relate directly to the additive manufacturing method or the component or to an application having it, such as a flow machine, and vice versa.
  • the term "and/or" when used in a series of two or more items means that each of the listed items can be used alone, or any combination of two or more of the listed items can be used.
  • FIG. 1 uses a schematic representation to indicate a powder bed-based additive manufacturing method.
  • FIG. 2 indicates a schematic perspective view of courses of a cooling fluid flow in a component as well as individual layers of the same that are to be strengthened.
  • FIG. 3 shows a schematic plan view of irradiation vectors for a layer to be produced additively.
  • FIG. 4 shows a schematic plan view of irradiation vectors for a subsequent layer to be produced additively.
  • FIG. 5 indicates on the left--similarly to FIG. 2--a schematic side view or sectional view (XZ plane) of flow paths in a component.
  • XZ plane sectional view
  • FIG. 6 indicates a schematic lateral or sectional view (YZ plane) of flow patterns in a component.
  • FIG. 7 shows a schematic plan view of radiation vectors running radially.
  • FIG. 8 shows a schematic plan view of radiation vectors running radially and concentrically.
  • FIG. 9 shows a schematic plan view of irradiation vectors for a layer to be produced additively.
  • FIG. 10 shows a schematic plan view of irradiation vectors for a layer to be produced additively following the layer mentioned.
  • FIG. 11 shows a schematic perspective view of a rotationally symmetrical component section with flow paths running partially longitudinally and circumferentially. Similar to FIGS. 9 and 10, FIGS. 12 and 13 indicate a radial offset of concentrically running courses of irradiation of successive layers to be produced additively.
  • FIG. 14 shows a corresponding perspective view of a component section according to FIGS. 12 and 13.
  • FIG. 15 indicates a radial section of the component according to the performance shown in FIGS. 12 to 14.
  • FIG. 1 indicates steps of an additive manufacturing process of a component 10 on the basis of a manufacturing system 100 shown in simplified form.
  • the manufacturing system 100 is preferably designed as an LPBF system and for the additive construction of parts or components from a powder bed, in particular for selective laser melting.
  • the system 100 can specifically also relate to a system for selective laser sintering or electron beam melting.
  • the system has a construction platform 1 .
  • a component 10 to be produced additively is produced in layers from a powder bed on the construction platform 1 .
  • the latter is formed by a powder P, which can be distributed in layers on the construction platform 1 by a coating device 3 .
  • regions of the layer L are selectively melted by an irradiation device 2 with an energy beam 5, for example a laser or electron beam, according to the predetermined geometry of the component 10 and then solidified.
  • the system 100 preferably has an irradiation device 2 for irradiating the powder layers L with an energy beam 5 .
  • the construction platform 1 is preferably lowered by an amount corresponding to the layer thickness L (compare the downward-pointing arrow in FIG. 1).
  • the thickness L is usually only between 20 and 40 gm, so that the entire process easily requires a number of thousands to several tens of thousands of layers.
  • the geometry of the component 10 is usually defined by a CAD file ("Computer-Aided-Design"). After reading such a file into the manufacturing system 100, the process then first requires the definition of a suitable irradiation strategy, for example by means of the CAM ("Computer-Aided-Manufacturing"), whereby the component geometry is also divided into the individual layers. This can be carried out or implemented by a corresponding build processor 4 via a computer program.
  • the component 10 is preferably a component of the hot gas path of a flow machine that can be cooled and is to be cooled during operation, such as a turbine blade, heat shield component of a combustion chamber and/or a resonator component, for example a Helmholtz resonator.
  • the component 10 can be a ring segment, a burner part or tip, a skirt, a shield, a heat shield, a nozzle, a seal, a filter, muzzle or lance, ram or swirler, or equivalent transition, insert, or equivalent retrofit part.
  • said build processor 4 or a corresponding circuit is provided, which, for example, is equipped with corresponding CAM Information or manufacturing instructions can be programmed and/or the irradiation device 2 can accordingly cause the component to be built up layer by layer in accordance with the manufacturing instructions described below.
  • the build processor circuit 4 preferably acts as an interface between the software that prepares the actual construction process and the corresponding hardware of the production system 100.
  • the build processor can be set up, for example, to run a computer program (cf. computer program product CPP) with corresponding production instructions.
  • Methods for providing manufacturing instructions for the powder bed-based additive manufacturing of the component 10 include, according to the invention, the provision of first irradiation vectors VI for a layer n to be produced additively (cf. Figures below), which, in the case of a corresponding irradiation by the energy beam 5, is a porous structure of the layer n cause.
  • the method also includes providing the first irradiation vectors VI for a layer n+1 to be produced additively after layer n in such a way that paths 11 of a porous structure 12 of layer n and the following layer n+1 are in one layer at least partially overlap in order to allow flow through the manufactured component along and/or obliquely in its assembly direction Z.
  • FIG. 2 shows a perspective view of a component or a component section which is additively layered can be built.
  • the dashed lines distinguish individual component layers.
  • the arrows running diagonally or obliquely marked with the reference character F are intended to indicate a corresponding direction of flow, according to which the component section can expediently be flowed through by a cooling fluid for cooling during normal operation.
  • the flow direction F runs at least partially in the XZ plane and is slightly inclined to the direction Z.
  • a scanning or irradiation strategy according to the invention must be defined in advance.
  • an irradiation power P of the first irradiation vectors VI can be reduced and/or an irradiation speed v of these can be increased relative to standard parameters for forming a solid material structure. This is indicated in FIG. 3 and the following figures.
  • FIG. 3 shows the first irradiation vectors VI (vertical) which cause the functional porosity. These are only arranged in a grid-like manner, for example.
  • the first irradiation vectors VI comprise a plurality of parallel irradiation vectors of a given layer n for the component 10.
  • the layer n can any layer in the layer structure of the component.
  • second irradiation vectors V2 can be provided for irradiation of layer n to be produced additively and/or in the following layer n+1 to be produced additively (cf. FIG. 4 below), which produce a dense structure of the corresponding layer, in particular a solid material. This is indicated in Figure 3 by the background. Such a dense structure is usually expedient for reasons of stability or for the dimensional stability of the component 10 .
  • third, irradiation vectors V3 can be provided in the manner of a grid or grid. These vectors V3 can also produce a porous structure in the construction section, for example a different type of porous structure with a differently measured porosity, of the corresponding layer.
  • Irradiation according to the first irradiation vectors VI and the further irradiation vectors V3 can, for example, each have a porosity of between 5% and 40%, preferably of about 20%.
  • FIG. 4 shows--analogously to FIG. 3--a schematic plan view of a component layer n+1 following that shown in FIG. 3, or a corresponding raw powder layer.
  • the arrangement of the first irradiation vectors VI shows a linear offset of these irradiation vectors relative to layer n (cf. FIG. 5).
  • FIG. 5 shows a side view of the component section in the XZ plane with diagonal paths 11 in the structure of the component, which are intended to indicate a cooling or flow path.
  • FIG. 5 shows enlarged for three successive layers n, n+1 and n+2. It can be seen that the structure paths 11 reinforced by the first irradiation vectors VI in the course of the additive manufacturing process are offset in layers by the amount d in order to produce the diagonal or oblique course.
  • the presented scanning strategy is based on a shift of the irradiation vectors in a preferred direction in order to favor the formation of the cavities or flow paths to be flowed through. For example, if a flow, as in the example shown, is to occur at an angle of more or less than 90° relative to the XY or slice plane, ie at least partially along the Z direction, a vector VI in slice n+1 is created by the amount d translated translationally along the positive X or Y direction.
  • the amount d determines the desired angle that the course of the flow paths should form with respect to the Z direction of construction.
  • an offset can also be dispensed with completely in order to achieve an exactly vertical course of the paths 11 (not explicitly marked).
  • FIG. 6 indicates a situation in the other lateral direction, the Y-direction, relative to the Z build-up direction.
  • FIG. 7 shows a top view of a circular production area or a round layer area.
  • a radial direction is marked with an arrow and the reference symbol R starting from a central area.
  • First irradiation vectors VI of a corresponding irradiation pattern are arranged or provided along R--arranged radially symmetrically in the present case merely by way of example--in order to form a porous layer structure. After production, this advantageously again allows a radial throughflow of a fluid F, and a correspondingly achievable cooling in the component.
  • Said first radiation vectors VI run uniformly at a distance of one polar angle. Contrary to what is shown, this angle distance can of course also vary between individual vectors VI.
  • second irradiation vectors for forming a dense material structure of the layer—are designated. These vectors V2 mean the remaining layer structure and are shown—for the sake of clarity—without individual irradiation paths.
  • scan vectors according to FIG. 7 can be provided.
  • a plurality of further, concentrically arranged irradiation vectors V3 are indicated in FIG. 8, which likewise produce an at least partially porous structure in one of the layers. This, for example, to be able to bring about a cooling effect in the circumferential direction if the component is to be flown through and cooled accordingly during operation.
  • the above-mentioned radiation vectors VI running radially are supplemented by concentric paths or paths V3, which run at a radial distance from one another and can form both a closed and an interrupted path. This applies equally to the other radiation vectors described.
  • the permeability for a cooling fluid F can be achieved, for example, by omitting layers and reducing the energy they have introduced. For example, open areas can also be provided in a targeted manner, which allow a corresponding permeability.
  • an impermeable “wall” can be provided—for example in sectors—if the component 10 or the corresponding component area is to be cooled only in the Z direction, for example.
  • FIG. 9 shows, for a given slice n, an irradiation pattern already described with reference to FIG. 8, comprising the first, second and further, third, irradiation vectors VI, V2 and V3.
  • FIG. 10 again shows the situation for a—preferably immediately—following layer n+1. It can be seen that the first irradiation vectors VI of the following slice n+1 have been rotated clockwise by a small angle Df relative to the first irradiation vectors VI of slice n. With this configuration of the present invention, the through-flow and cooling effect can likewise be tailored in an advantageous manner and locally decisively improved.
  • FIG. 11 shows a perspective schematic view of a cylindrical or approximately rotationally symmetrical component structure which can be produced according to an irradiation pattern according to FIGS. 9 and 10.
  • the first irradiation vectors VI were twisted or rotationally offset layer by layer, so that the paths 11 of the component 10 that are shown and run obliquely relative to the direction Z of construction can be produced. According to the illustration in FIG. 11, the anti-clockwise rotation is shown.
  • FIGS. 12 to 14 also indicate that, in addition to twisting the flow-active paths (cf. VI) in component 10, a whirlpool effect (cf. irradiation vectors V3) or eddy-like flow and cooling can also be achieved.
  • the concentric tracks can be provided in layers, for example with a radial offset (cf. Ar), and thus a correspondingly improved flow and cooling can be specified over the entire component. This is shown in particular in FIG. 13 for layer n+1.
  • the radial offset can be provided without a polar offset, and vice versa.
  • FIG. 14 shows a perspective schematic view of the component 10 with both a radial and a polar offset of the porosity-causing irradiation vectors VI and V3.
  • Such a scanning or irradiation strategy could, for example, be used to supply a lubricant to a component area or a bearing in the Z direction, and then to be evenly transferred to a shaft both circumferentially and over the length and radius of the bearing.
  • FIGS. 12 and 13 A radial or longitudinal section of the structure of Figure 14 is shown in Figure 15, where in particular the concentric and longitudinal flow paths - through the layered sen radial offset (see FIGS. 12 and 13) are arranged slightly inclined to the Z-direction.
  • the irradiation strategies presented advantageously allow a tailoring of cooling or heat dissipation properties of thermally highly stressed components in general.
  • the thermal properties can also only be adapted and improved to local or individual areas of the component with the solutions presented.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Automation & Control Theory (AREA)
  • Plasma & Fusion (AREA)
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  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé visant à fournir des instructions de fabrication pour la fabrication additive sur lit de poudre d'un élément (10). Le procédé comprend la fourniture de premiers vecteurs d'exposition à un rayonnement (V1) pour une couche (n) à fabriquer de manière additive, lesquels premiers vecteurs d'exposition à un rayonnement, lors d'une d'exposition à un rayonnement appropriée par un faisceau d'énergie (5), en particulier un faisceau laser ou un faisceau d'électrons, créent une structure poreuse de la couche, ainsi que la fourniture de premiers vecteurs d'exposition à un rayonnement (V1) pour une couche (n +1) à fabriquer de manière additive et qui suit la couche (n), de telle sorte que des trajets (11) d'une structure poreuse (12) de la couche (n) et de la couche suivante (n +1) se chevauchent au moins partiellement afin de permettre un écoulement à travers l'élément fabriqué le long d'une direction de formation (Z). L'invention concerne également un procédé de fabrication additive correspondant, un élément fabriqué de manière correspondante, ainsi qu'un programme informatique ou un produit-programme informatique.
EP21731710.6A 2020-07-22 2021-06-01 Stratégie d'exposition à un rayonnement d'une structure fabriquée de manière additive et pouvant être refroidie Pending EP4142970A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020209239.7A DE102020209239A1 (de) 2020-07-22 2020-07-22 Bestrahlungsstrategie für eine kühlbare, additiv hergestellte Struktur
PCT/EP2021/064623 WO2022017670A1 (fr) 2020-07-22 2021-06-01 Stratégie d'exposition à un rayonnement d'une structure fabriquée de manière additive et pouvant être refroidie

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EP4142970A1 true EP4142970A1 (fr) 2023-03-08

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US (1) US20230294207A1 (fr)
EP (1) EP4142970A1 (fr)
CN (1) CN115916432A (fr)
DE (1) DE102020209239A1 (fr)
WO (1) WO2022017670A1 (fr)

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DE102021206000A1 (de) * 2021-06-14 2022-12-15 Siemens Energy Global GmbH & Co. KG Verfahren zur pulverbettbasierten additiven Herstellung einer filigranen Struktur mit vorbestimmter Porosität sowie poröse Funktionsstruktur
DE102022109802A1 (de) * 2022-04-22 2023-10-26 Eos Gmbh Electro Optical Systems Verfahren und Vorrichtung zur Generierung von Steuerdaten für eine Vorrichtung zur additiven Fertigung eines Bauteils
CN118417587A (zh) * 2024-07-05 2024-08-02 山东创瑞激光科技有限公司 一种选择性激光熔化成形透气结构的制备方法

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EP2415552A1 (fr) 2010-08-05 2012-02-08 Siemens Aktiengesellschaft Procédé de fabrication d'un composant par fusion laser sélective
EP2815823A1 (fr) 2013-06-18 2014-12-24 Alstom Technology Ltd Procédé de production d'un article en trois dimensions et article produit avec un tel procédé
EP2893994B1 (fr) * 2014-01-14 2020-07-15 General Electric Technology GmbH Procédé de fabrication d'un composant métallique ou céramique par fusion laser sélective
FR3060410B1 (fr) * 2016-12-21 2019-05-24 Technologies Avancees Et Membranes Industrielles Element de separation par flux tangentiel integrant des canaux flexueux
US10821512B2 (en) * 2017-01-06 2020-11-03 General Electric Company Systems and methods for controlling microstructure of additively manufactured components
US10357829B2 (en) 2017-03-02 2019-07-23 Velo3D, Inc. Three-dimensional printing of three-dimensional objects
EP3406370A1 (fr) 2017-05-22 2018-11-28 Siemens Aktiengesellschaft Procédé et système de fabrication additive
EP3444100B1 (fr) * 2017-08-16 2022-06-08 CL Schutzrechtsverwaltungs GmbH Appareil de fabrication additive d'objets tridimensionnels
US10698386B2 (en) * 2017-10-18 2020-06-30 General Electric Company Scan path generation for a rotary additive manufacturing machine
US11998984B2 (en) * 2018-04-01 2024-06-04 Astrobotic Technology, Inc. Additively manufactured non-uniform porous materials and components in-situ with fully material, and related methods, systems and computer program product
EP3608039A1 (fr) 2018-08-07 2020-02-12 Siemens Aktiengesellschaft Procédé d'irradiation pour la fabrication additive à trajectoire prédéfinie

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WO2022017670A1 (fr) 2022-01-27
US20230294207A1 (en) 2023-09-21
CN115916432A (zh) 2023-04-04
DE102020209239A1 (de) 2022-01-27

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