WO2020089087A1

WO2020089087A1 - Collection device for an additive construction apparatus and additive construction method and additive construction apparatus for additively manufacturing at least one component region of a component

Info

Publication number: WO2020089087A1
Application number: PCT/EP2019/079199
Authority: WO
Inventors: Jörg HAMANN; Johannes Casper
Original assignee: MTU Aero Engines AG; Eos Gmbh Electro Optical Systems
Priority date: 2018-10-30
Filing date: 2019-10-25
Publication date: 2020-05-07
Also published as: DE102018127113A1

Abstract

The invention relates to a collection device (10) for an additive construction apparatus (100) for additively manufacturing at least one component region of a component (15). The collection device (10) comprises at least one collection means (16) for collecting process by-products of an additive construction method carried out by means of the additive construction apparatus (100), and at least one holding means (12) for fixing the collection device (10) on an inductor (14) of an inductive temperature-control device of the additive construction apparatus (100). The invention further relates to an additive construction method and to an additive construction apparatus (100) for additively manufacturing at least one component region of a component (15).

Description

Collection device for a layer construction device as well as layer construction method and layer construction device for the additive manufacturing of at least one component area of a component

description

The invention relates to a collecting device for a layer construction device for the additive production of at least one component area of a component. The invention further relates to a layer construction method and a layer construction device for the additive manufacturing of at least one component area of a component, in particular a component of a turbomachine.

A large number of layer construction methods and devices for producing individual component areas or complete components are known. In particular, additive or generative manufacturing processes (so-called rapid manufacturing or rapid prototyping processes) are known in which the component, which can be a component of a turbomachine or an aircraft engine, for example, is built up in layers. Predominantly metallic components can be manufactured, for example, by laser or electron beam melting processes. At least one powdery component material is first applied in layers in the area of a build-up and joining zone in order to form a powder layer. The component material is then solidified locally by supplying energy to the component material in the area of the assembly and joining zone by means of at least one energy beam, where the component material melts or sinters and forms a component layer. The energy beam is layer-controlled depending on the layer information of the component to be manufactured. The layer information is usually generated from a 3D CAD body of the component and divided into individual component layers. After the molten component material has solidified, the building platform is lowered in layers by a predefined layer thickness. Then the steps mentioned are repeated until the desired completion of the desired component area or the entire component. The component area or the component can basically be produced on a construction platform or on an already generated part of the component or component area. The advantages of this additive manufacturing lie in particular in the possibility of being able to produce very complex component geometries with cavities, undercuts and the like in a single process. Layer construction processes are particularly suitable for easily meltable and weldable metallic materials. However, many high-temperature materials such as nickel or cobalt-based alloys or intermetallic compounds such as titanium aluminides are only partially or difficult to weld. For these materials, preheating the material and the area of the component that has already been manufactured to temperatures in the vicinity of the melting or sintering point of the respective material is a promising approach. Today's layer construction devices, for example in so-called SLM systems (Selective Laser Melting Machines), often have an inductive temperature control device for this purpose, which comprises at least one inductor (coil), via which the material or the area of the component already manufactured locally in the assembly and joining zone can be brought to a desired temperature. The inductor is located in the immediate vicinity of the assembly and joining zone in order to be able to induce sufficient eddy currents.

In today's layer construction devices, for example in so-called SLM systems (Selective Laser Melting Machines), process by-products are removed via a protective gas flow so that adverse effects with regard to the joining quality and surface quality of the manufactured component are minimized. Nevertheless, it has so far not been possible to avoid process by-products such as smoke, soot, spatter, material powder and the like being deposited on the inductor or the inductors of such temperature control devices. If these process by-products then get back into the joining zone, they worsen the process result, cause errors and reduce z. B. the mechanical properties of the manufactured component.

The object of the present invention is to provide better protection against undesired process byproducts in the area of the build-up and joining zone in layer-building processes.

The object is achieved according to the invention by a collecting device with the features of claim 1, by a layer construction method according to claim 8 and by a layer construction device according to claim 11. Advantageous refinements with expedient further developments of the invention are given in the respective subclaims, advantageous refinements of each aspect of the invention being regarded as advantageous refinements of the other aspects of the invention. A first aspect of the invention relates to a collecting device for a layer construction device for the additive production of at least one component area of a component. Improved protection against undesired process by-products in the area of the build-up and joining zone in layered construction methods is made possible according to the invention in that the collecting device has at least one collecting means for collecting and storing process by-products of a layered construction method carried out by means of the layered construction device and at least one holding means for fixing the collection device to one Inductor of an inductive temperature control device of the layer construction device comprises. In other words, it is provided that the collecting device can be fixed on or on one or more inductors of an inductive temperature control device of the layer building device and includes collecting means for collecting process by-products that fall in particular, which arise during a layer building process. This reliably prevents process by-products from being deposited directly on the inductor and from falling uncontrollably into the build-up and joining zone in the further course of the layer-building process, where they would lead to a deterioration in the process result. Instead, process by-products are collected by the collecting agent and stored there, so that they are reliably prevented from falling back into the assembly and joining zone or onto other process elements. In addition, the mode of operation of the inductor remains unaffected, so that reliable temperature control can be guaranteed over the entire layer construction process. This also contributes to increasing component quality. By fixing the collecting device on the inductor, the collecting device can additionally be carried with or without a time offset depending on a current scan position of an energy beam on a construction field of the associated layer construction device, that is to say with the current scan position. The collecting device according to the invention is not used for the global collecting of impurities, as is involuntarily made, for example, by the floor of the process chamber in the enclosed construction field. Instead, the catchment device according to the invention, if it is attached to an inductor of a layer construction device, collects contaminants and process by-products locally during a layer construction process. Local collection can be carried out in a targeted manner in the vicinity of the production of customary process by-products. In particular, the collecting device according to the invention catches so-called “splashes”, which typically surround the construction field or the process chamber floor around the construction field within a certain distance by a scan position of the energy beam. to fall, that is, to fall on a statistical average within a defined radius range. In general, "one / one" are to be read as indefinite articles within the scope of this disclosure, ie without "explicitly stated otherwise" as "at least one / at least one". Conversely, "one / one" can also be understood as "only one / only one".

In an advantageous embodiment of the invention, it is provided that the at least one collecting means comprises a pocket with an entry opening, the entry opening preferably being arranged on a side of the collecting device facing away from the holding means. In this way, process by-products can be collected in a particularly reliable manner and stored until the pocket is emptied, so that penetration into the assembly and joining zone is reliably prevented. The bag can basically be made of a flexible or an inflexible material.

Further advantages result from the fact that the pocket tapers starting from an inlet opening. In other words, it is provided that the pocket is designed like a funnel. In this way, in particular small-grained process by-products can be reliably collected via the large-area inlet opening and, for example, can be transported with the aid of gravity in the direction of the tapered end region of the pocket, thereby ensuring reliable storage. Alternatively or additionally, it is provided that an inner space of the bag is free of corners in cross section. This can be achieved for example by a round or non-round design of the bag. A corner-free design ensures that the bag can be easily filled and emptied again without particles getting stuck in corners. The bag can also basically have any volume for storing the process by-products and / or any extension. The pocket preferably has a volume which is designed to accommodate all of the process by-products which get into it or are brought into it during a layer construction process. The required volume can, for example, be calculated and / or determined on the basis of empirical values. This can prevent the pocket from overflowing during the shift building process and possibly contaminating the construction field or other process-relevant elements within the process chamber as a result of the overflow. After completion of the shift construction process, the pocket can be emptied, so that the collecting device can function as intended in a further shift construction process. Alternatively or it is additionally provided that a cross-sectional area of the entry opening of the pocket corresponds at least essentially to an orthogonal projection of an assigned inductor onto a construction field of the layer construction device. In other words, it is provided that the inlet opening of the pocket in the assembled state of the collecting device extends as completely as possible, that is to say with deviations of at most ± 10%, over the entire width of the associated inductor, completely or at least approximately around its top completely covered. Basically, it can be provided that the inlet opening of the pocket is substantially larger than the width of the associated inductor, but this usually leads to an undesired obstruction of the energy beam used for solidification during operation.

In a further advantageous embodiment of the invention it is provided that the collecting device comprises at least one suction connection fluidly coupled to the collecting means for a suction device for suctioning off process by-products from the at least one collecting means. This makes it possible to suction off process by-products collected continuously or discontinuously in order to prevent overflow. Alternatively or additionally, it is provided that the collecting device comprises at least one flow channel for guiding a fluid flow. On the one hand, this makes it possible to carry off collected process by-products, and on the other hand, if the flow channel is designed appropriately, a protective gas stream can be generated in the region of the inductor, through which process by-products are removed via the build-up and joining zone. Finally, a protective gas stream can also be used for thermal insulation of the collecting agent in order to prevent caking of process by-products.

Further advantages result from the fact that the collecting device comprises at least one insulation means by means of which the collecting means is thermally insulated from the holding means. This can reliably prevent "caking" of process by-products and other contaminants in the collecting agent.

In a further advantageous embodiment of the invention it is provided that the collecting device comprises at least one cleaning agent for cleaning the at least one collecting agent from process by-products. This makes it easier to remove collected process by-products and clean the collection agent. The cleaning agent is not suitable for limited execution and can be designed, for example, to suction, brush, emit the Auffangmit tel, etc.

Further advantages result from the fact that the collecting device comprises a passage opening for an energy beam of the layer construction device. This can ensure that the collecting device can be arranged during a solidification step in the immediate vicinity of the point of impact of the energy beam on the powder or component layer, ie where most of the process by-products are created. Alternatively or additionally, it is provided that the collecting device is at least predominantly annular. In other words, the collecting device for local collecting has a shape that corresponds to a ring that is completely closed or largely closed. Such a ring has a central passage opening for an energy beam and covers as large a proportion as possible a relevant area around the current scan position or process point, since spatter and other contaminants can fly away on all sides, even if there are preferred directions under certain conditions .

A second aspect of the invention relates to a layer construction method for additive manufacturing to at least one component area of a component, in particular a component of a fluid flow machine, in which at least the steps a) applying at least one powder layer of a material in the area of a build-up and joining zone of at least one lowerable Construction platform, the material being tempered to a predetermined temperature by means of an inductive temperature control device, b) layer-by-layer and local melting and / or sintering of the material to form a component layer by selective irradiation of the material with at least one energy beam, c) layer-by-layer lowering of the construction platform a predefined layer thickness and d) repeating steps a) to c) until the component area is completed. According to the invention, it is provided that at least one collecting device according to the first aspect of the invention is fixed to an inductor of the temperature control device by means of its holding means and that process by-products of the layer construction method are collected by means of its at least one collecting means. This provides improved protection against undesired process by-products in the area of the assembly and joining zone, since process by-products are caught and no longer deposit on the inductor or inductors. This leads to better process results and better component quality lities. Further advantages can be found in the descriptions of the first aspect of the invention, advantageous configurations of the first aspect of the invention being regarded as advantageous configurations of the second aspect of the invention. Conversely, advantageous refinements of the second aspect of the invention are also to be regarded as advantageous refinements of the first aspect of the invention.

In an advantageous embodiment of the invention it is provided that the at least one collecting means of the collecting device is cleaned permanently or at regular or irregular intervals and / or as required from collected process by-products. For example, sensory monitoring, a calculation based on certain parameters or empirical values, the current or planned construction time, the material currently used, the radiation parameters used or any combination thereof can be used to determine a need. In this way, collected process by-products can be removed to avoid overflow of the collecting device. If necessary, the removal can take place permanently, for example, during a solidification step or in a parking position of the inductor when applying a new powder layer.

Further advantages result from the fact that the collecting device is acted upon permanently or temporarily with a gas, in particular a protective gas. The gas, which can also be a gas mixture, can be used for various purposes as required. For example, it can be used for purging the holding means, for generating a directed gas stream for removing process by-products and / or for tempering or cooling the collecting device.

A third aspect of the invention relates to a layer construction device for the additive production of at least one component region of a component by an additive layer construction method. The layer building device comprises at least one powder feed for applying at least one powder layer of a material to a build-up and joining zone of a movable building platform, an inductive temperature control device, by means of which the material is to be tempered to a predetermined temperature before and / or during the layer building process, and at least a radiation source for generating at least one energy beam for layer-by-layer and local fusing and / or sintering of the tempered material to form a structural Partial layer by selective irradiation of the material with the at least one energy beam according to a predetermined radiation strategy. According to the invention, the layer construction device comprises at least one collecting device according to the first aspect of the invention, which is fixed by means of its at least one holding means to an inductor of the temperature control device. This provides improved protection against undesired process by-products in the area of the assembly and joining zone, since process by-products can be collected and no longer deposit on the inductor or inductors. This leads to better process results and better component qualities. Further advantages can be found in the descriptions of the first and second aspects of the invention, advantageous configurations of the first and second aspects of the invention being regarded as advantageous configurations of the third aspect of the invention. Conversely, advantageous refinements of the third aspect of the invention are to be seen as advantageous refinements of the first and second aspects of the invention.

In an advantageous embodiment of the invention, the layer construction device is designed as a selective laser melting and / or laser sintering device. As a result, components can be produced, the mechanical properties of which at least essentially correspond to those of the construction material. For example, a CO ₂ laser, Nd: YAG laser, Yb fiber laser, diode laser or the like can be provided to generate a laser beam. It can also be seen that two or more laser beams are used. Depending on the component material and the radiation strategy, melting and / or sintering of the powder may occur during the irradiation, so that in the context of the present invention the term “welding” can also be understood to mean “sintering” and vice versa.

In an advantageous embodiment of the invention, it is provided that the collecting device comprises a pocket with an inlet opening, the inlet opening being arranged parallel to the construction field in the assembled state of the collecting device and / or being arranged facing a ceiling and / or a chamber wall of a process chamber of the layer construction device. In this way, the statistical trajectory or the probability of impact of typical process by-products can be taken into account and the process by-products that have already been caught can fall out of the pocket reliably. In an advantageous embodiment of the invention it is provided that the collecting means of the collecting device extends along an area of the inductor facing away from the powder layer. Regardless of the shape of the inductor, it can be ensured that no process by-products can deposit on its surface, but are caught.

Further advantages result if the temperature control device comprises at least two inductors that are movable relative to one another. This makes it possible to selectively superimpose the magnetic fields of the inductors in order to heat certain areas particularly strongly. The collecting device or the collecting means can be arranged on an inductor or on two or more inductors, in which case the entire catches of the second or further inductor need not be provided with a collecting means in order to make the inductors relatively movable not restrict each other.

Further advantages result from the fact that a collecting device according to the first exemplary embodiment is fixed to each inductor. This enables process by-products to be collected in a particularly reliable manner.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and feature combinations mentioned above in the description, as well as the features and feature combinations mentioned below in the figure description and / or shown alone in the figures, can be used not only in the respectively specified combination, but also in other combinations, without the frame to leave the invention. Embodiments of the invention are thus also to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, but can be derived from the explained embodiments and can be generated by separated combinations of features. Embodiments and combinations of features are also to be regarded as disclosed, which thus do not have all of the features of an originally formulated independent claim. There are also designs and combinations of features, in particular by the above-described designs, to be regarded as disclosed, which go beyond or differ from the combinations of features set out in the claims. It shows: Figure 1 is a schematic sectional view of a collecting device according to the invention, which is fixed to an inductor of a layer construction device.

2 shows a schematic sectional view of a collecting device according to the invention in accordance with a further exemplary embodiment, which is fixed to an inductor of a layer construction device; and

Fig. 3 is a schematic, partially in section view of the layer construction device according to the prior art for additive manufacturing of manufacturing products.

1 shows a schematic sectional view of a collecting device 10 according to the invention, which is fixed via a holding means 12 to an inductor 14 of a layer construction device 100 designed as a selective laser melting and / or laser sintering device (see FIG. 3). The inductor 14 is in the present case a coil of a temperature control device (not shown). The inductor 14 is used for the local tempering of a material powder or an already manufactured component area of an additively manufactured component 15 (see FIG. 2) and is located in the immediate vicinity of a build-up and joining zone II (see FIG. 2) of the layer construction device 100.

In the present example, the collecting device 10 comprises an arranged collecting means 16 above the inductor 14, which is designed as a pocket and in which process by-products such as smoke, soot, spatter, powder material and the like are collected during the layer-building process. Thus, these process by-products can not deposit on the inductor 14 and cannot fall back into the joining zone II, where they can worsen the process result, cause errors and reduce the properties of the component 15 produced. It can be seen that the collecting means 16 tapers starting from an inlet opening 18 and that a cross-sectional area of the inlet opening 18 is somewhat wider than the inductor 14 underneath in order to reliably shield it.

In order to permanently or temporarily clean the collecting means 16 of the collecting device 10 from collected process by-products, it is provided that the collecting device 10 is acted upon by a protective gas, either continuously or temporarily. This is in Fig. 1 with the arrows I. symbolizes. For this purpose, the pockets 16 are connected via a suction connection (not shown) and, if appropriate, via a secondary circuit to a global circulation system of the layer construction device for a protective gas application. Alternatively, a separate gas circuit can be seen before. As can be seen in FIG. 1, the gas flow identified by the arrows I can also be used to form a directional laminar flow between adjacent sections of the collecting means 16 in order to discharge rising process by-products directly from the area of the assembly and joining zone II. For cleaning, the pocket 16 can be permanently cleaned during a welding process or in a parking position of the inductor 14 when a new layer of powder is applied, e.g. B are vacuumed, brushed, blasted etc.

If the temperature control device has two or more inductors 14 (e.g. cross-coil technology), pockets can be provided on one or both or all further inductors 14, the entire length of each inductor 14 not being provided with a collecting means 16 must, in order not to hinder a relative mobility of inductors 14 to one another.

Fig. 2 shows a schematic sectional view of a collecting device 10 according to the invention according to a further embodiment, which is fixed to an inductor 14 of the layer construction device 100. In contrast to the previous example, the collecting device 10 has two differently shaped collecting means 16. In addition, the Auffangein device 10 has a flow channel 20 through which a protective gas flow I is passed in order to keep the area of the assembly and joining zone II free of impurities by a directed fluid flow. In addition, the pockets 16 are decoupled from the inductor 14 by the inert gas flow I mixed to prevent caking of the impurities in the pockets 16. It can also be seen that the collecting device 10 comprises a passage opening 22 for an energy beam E of the layer construction device 100, through which the energy beam E directed via an optic 24, which in the present case is a laser beam, points to the assembly and joining zone II can meet to selectively layer the material powder to component of the additive to be built on a lowerable construction platform 26 to consolidate component 15 ver.

A layer construction device 100, shown schematically and partially in section in FIG. 3, is exemplarily designed as a selective laser sintering or laser melting device and is shown in FIG Explained below. The layer building device 100 is used with a collecting device 10 according to the invention, for example as shown in FIGS. 1 and 2, the collecting device 10 and the induction coil (s) 14 on which the collecting device 10 is fixed Not shown for reasons of clarity. To build an object or component 15, it contains a process chamber 40 with a chamber wall 42. In the process chamber 40, an upwardly open construction container 44 with a wall 46 is arranged. A working level 48 is defined through the upper opening of the building container 44, the area of the working level 48 lying within the opening, which can be used for building the component or object 15, being referred to as the building and joining zone or as building site II . Arranged in the container 44 is a support 50 which can be moved in a vertical direction z and on which a base plate 52 is attached, which closes the building container 44 at the bottom and thus forms the bottom thereof. The base plate 52 may be a plate formed separately from the carrier 50 and attached to the carrier 50, or it may be integrally formed with the carrier 50. Depending on the powder and process used, a building platform 26 can be attached to the base plate 52, on which the object 15 is built. The object 15 can also be built on the base plate 52 itself, which then serves as the building platform 26. The object 15 to be formed in the building container 44 on the building platform 26 is shown below the working level 48 in an intermediate state with a plurality of solidified layers, surrounded by material 56 that has remained unconsolidated and serves as the building material. The layer construction device 100 further contains a storage container 58 for the powdery material 56 which can be solidified by electromagnetic radiation and a layer 60 movable in a horizontal direction Y as a powder feeder for applying the material 56 to the construction field I. The storage container 58 can alternatively also below the Level of construction site II may be arranged (not shown). From this, the material 56 z. B. by a vertically movable in the z direction Do sierstempel the coater 60 are supplied. The layer construction device 100 also contains an exposure device 64 with a laser 66, which generates a laser beam E as an energy beam, which is deflected via a deflection device 70 and through a focussing device 72 via a coupling window 82 which is on the ceiling of the process chamber 40 in its wall 42 is attached, is focused on the working plane 48.

Furthermore, the layer construction device 100 contains a control unit 74, via which the individual components of the layer construction device 100 are carried out in a coordinated manner for carrying out the construction process. controlled. Control unit 74 may include a CPU, the operation of which is controlled by a computer program (software). The computer program can be stored separately from the device on a storage medium from which it can be loaded into the device, in particular into the control unit 74. In operation, to apply a powder layer, the carrier 50 is first lowered by a height which corresponds to the desired layer thickness. A layer of the powdery material 56 is then applied by moving the coater 60 over the working plane 48. For safety, the coater 60 pushes a slightly larger amount of material 56 in front of it than is required for the build-up of the layer. The coater 60 pushes the planned excess of material 56 into an overflow container 62. On both sides of the construction container 44, an overflow container 62 is arranged. The powdery material 56 is applied at least over the entire cross section of the object 15 to be produced, preferably over the entire construction area II, that is to say the region of the working plane 48, which can be lowered by a vertical movement of the carrier 50. The cross section of the object 15 to be produced is then scanned by the laser beam E with a radiation exposure region (not shown) which schematically represents an intersection of the energy beam bundle with the working plane 48. As a result, the powdery material 56 is solidified at locations which correspond to the cross section of the object 15 to be produced. These steps are repeated until the object 15 is finished and can be removed from the building container 44. In order to generate a preferably laminar process gas flow in the process chamber 40, the layer construction device 100 furthermore basically contains optional components, namely a gas supply channel 34 ", a gas inlet nozzle 34 ', a gas outlet opening 30' and a gas discharge channel 30". The process gas flow moves horizontally in a plane D across the construction site II. A flow direction of the process gas stream runs in the same spatial direction as the coating direction Y, ie parallel to it. The gas supply duct 34 ", the gas inlet nozzle 34 ', the gas outlet opening 30' and the gas discharge duct 30" can also be arranged, for example, rotated through 90 ° in or around the process chamber 40, that the (horizontal) coating direction Y (accordingly rotated by 90 °) is essentially perpendicular to the (horizontal) flow direction of the process gas stream. The gas supply and discharge can also be controlled by the control unit 74 (not shown). The gas sucked out of the process chamber 40 can be supplied to a filter device (not shown), and the filtered gas can be fed back to the process chamber 40 via the gas supply channel 34 ", thereby creating a circulating air system with a closed gas circuit is formed. Instead of only one gas inlet nozzle 34 ′ and one gas outlet opening 30 ′, a plurality of nozzles or openings can also be provided in each case.

The parameter values specified in the documents for the definition of process and measurement conditions for the characterization of specific properties of the subject matter of the invention are also included within the scope of deviations - for example, due to measurement errors, system errors, DIN tolerances and the like - as part of the scope of the invention to watch.

Reference symbol list:

10 fall arrester

12 holding means

14 inductor

15 component

16 catching agents

18 inlet opening

20 flow channel

22 passage opening

24 optics

26 construction platform

30 ”gas discharge duct

30’ gas outlet opening

34 ’gas inlet nozzle

34 ”gas feed channel

40 process chamber

42 chamber wall

44 building containers

46 wall

48 working level

50 carriers

52 base plate

56 material

58 storage containers

60 coaters

62 overflow tank

64 exposure device

66 lasers

70 deflection device

72 focusing device

74 control unit 82 coupling window

100 layer building device

I shielding gas flow

II construction site

E energy beam

D level

x, y horizontal direction z vertical direction

Y coating direction

Claims

1. Collection device (10) for a layer construction device (100) for the additive production of at least one component area of a component (15), comprising at least one collection device (16) for collecting and storing process by-products of a layer construction method carried out by means of the layer construction device (100) and at least a holding means (12) for fixing the collecting device (10) to an inductor (14) of an inductive temperature control device of the layer construction device (100).

2. Collection device (10) according to claim 1,

characterized in that

the at least one collecting means (16) comprises a pocket with an entry opening (18), where the entry opening (18) is preferably arranged on a side of the collecting device (10) facing away from the holding means (12).

3. Collection device (10) according to claim 2,

characterized in that

the pocket tapers starting from the inlet opening (18) and / or that an interior of the pocket is free of corners and / or that the pocket has a volume that accommodates all who get into it during a layer construction process or spent it Process by-products are formed and / or that a cross-sectional area of the inlet opening (18) of the pocket corresponds at least essentially to an orthogonal projection of an assigned inductor (14) onto a construction field (II) of the layer construction device (100).

4. Collection device (10) according to one of claims 1 to 3,

characterized in that

this comprises at least one suction connection fluidly coupled to the collecting means (16) for a suction device for suctioning off process by-products from the at least one collecting means (16) and / or that it comprises at least one flow channel (20) for guiding a fluid flow.

5. Collection device (10) according to one of claims 1 to 4,

characterized in that

this comprises at least one insulation means by means of which the collecting means (16) is thermally insulated from the holding means (12).

6. Collection device (10) according to one of claims 1 to 5,

characterized in that

this comprises at least one cleaning agent for cleaning the at least one collecting agent (16) from process by-products.

7. collecting device (10) according to one of claims 1 to 6,

characterized in that

this comprises a passage opening (22) for an energy beam (E) of the layer construction device (100) and / or that the collecting device (10) is at least predominantly annular.

8. Layer construction method for additive manufacturing of at least one component area of a component (15), in particular a component (15) of a turbomachine, comprising at least the following steps:

a) orders of at least one powder layer of a material (56) in the region of a build-up and joining zone (II) of at least one lowerable construction platform (26), the material (56) being tempered to a predetermined temperature by means of an inductive temperature control device;

b) layer by layer and local melting and / or sintering of the material (56) to form a component layer by selective irradiation of the material (56) with at least one energy beam (E);

c) lowering the building platform (26) layer by layer by a predefined layer thickness; and d) repeating steps a) to c) until completion of the component area,

characterized in that

at least one collecting device (10) according to one of claims 1 to 7 is fixed to an inductor (14) of the temperature control device by means of its holding means (12) and by means of its at least one collecting means (16) process by-products of the layer construction method are collected.

9. layer construction method according to claim 8,

characterized in that

the at least one collecting means (16) of the collecting device (10) is cleaned permanently or at regular or irregular intervals or as required from collected process by-products.

10. layer construction method according to claim 8 or 9,

characterized in that

a gas, in particular a protective gas, is applied to the collecting device (10) permanently or temporarily.

11. Layer construction device (100) for the additive production of at least one component area of a component (15) by an additive layer construction method, comprising:

at least one powder feeder for applying at least one powder layer of a material (56) to a build-up and joining zone (II) of a moveable construction platform (26);

an inductive tempering device, by means of which the material (56) is to be tempered to a predetermined temperature before and / or during the layer building process; and

at least one radiation source (66) for generating at least one energy beam (E) for layer-by-layer and local melting and / or sintering of the temperature-controlled material (56) for forming a component layer by selective irradiation of the material (56) with the at least one energy beam (E) according to a predetermined radiation strategy,

characterized in that

at least one collecting device (10) according to one of claims 1 to 7 is provided, which is fixed by means of its at least one holding means (12) to an inductor (16) of the tempering device.

12. layer construction device (100) according to claim 11,

characterized in that

the collecting device (10) comprises a pocket with an inlet opening (18), the inlet opening (18) being arranged parallel to the construction field (II) in the assembled state of the collecting device (10) and / or a ceiling and / or a chamber wall ( 42) is arranged facing a process chamber (40) of the layer construction device (100)

13. layer construction device (100) according to claim 11 or 12,

characterized in that

the collecting means (16) of the collecting device (10) extends along a region of the inductor (16) facing away from the powder layer.

14. layer construction device (100) according to one of claims 11 to 13,

characterized in that

the temperature control device comprises at least two inductors (16) which can be moved relative to one another.

15. layer construction device (100) according to claim 14,

characterized in that

a collecting device (10) according to one of claims 1 to 7 is defined on each inductor (16).