EP4200096A1

EP4200096A1 - Manufacturing device, method and computer program product for additively manufacturing components from a powder material

Info

Publication number: EP4200096A1
Application number: EP21766143.8A
Authority: EP
Inventors: Bernhard Gutmann; Michael Staiger; Sarah LEUCK; Stefan Findeisen
Original assignee: Trumpf Laser und Systemtechnik GmbH
Current assignee: Trumpf Laser und Systemtechnik GmbH
Priority date: 2020-08-24
Filing date: 2021-08-18
Publication date: 2023-06-28
Also published as: DE102020210724A1; WO2022043164A1; US20230191496A1

Abstract

The invention relates to a manufacturing device (1) for additively manufacturing components (3) from a powder material, comprising - a beam generation device (5) for generating a plurality of energy beams (7), - a scanner device (9) for at least intermittently irradiating a work region (11) in locally selective fashion by means of the energy beams (7), - an inert gas device (15) for generating an inert gas flow with a defined inert gas flow direction (P1), and comprising - a control device (17) configured to control the scanner device (9), wherein - the control device (17) is further configured to: define a first irradiated area (19.1) on the work region (11) for a first energy beam (7.1), a first irradiated portion (21.1) for the first energy beam (7.1) being displaced along said irradiated area from a first start position to a first end position within the first irradiated area (19.1); - define upstream of the first irradiated area (19.1) a second irradiated area (19.2) for a second energy beam (7.2), a second irradiated portion (21.2) for the second energy beam (7.2) being displaced along said second irradiated area from a second start position to a second end position, and to: - start an irradiation of the second irradiated area (19.2) with the second energy beam (7.2) once the first irradiated portion (21.1) and the second start position are not arranged relative to one another within an interaction zone determined by the inert gas flow direction.

Description

DESCRIPTION

Manufacturing equipment, method and computer program product for the additive manufacturing of components from a powder material

The invention relates to a manufacturing device, a method and a computer program product for the additive manufacturing of components from a powder material.

When additively manufacturing components from a powder material, an energy beam is typically displaced to predetermined irradiation positions of a work area—in particular along a predetermined irradiation path—in order to locally solidify powder material arranged in the work area. In particular, this is repeated layer by layer in powder material layers arranged one after the other in the working area, in order finally to obtain a three-dimensional component made of solidified powder material.

WO 2018/118333 A1 discloses a manufacturing device for the additive manufacturing of components from a powder material, which has a plurality of lasers as the beam generating device, which are set up to generate a plurality of laser beams as energy beams. The production device also has a scanner device that is set up to locally and selectively irradiate a work area with the energy beams in order to use the energy beams to produce a component from the powder material arranged in the work area. Furthermore, the manufacturing device has a protective gas device that is set up to generate a protective gas flow with a defined protective gas flow direction over the work area. The production device also has a control device which is operatively connected to the scanner device and set up to control the scanner device. In this case, the control device is set up in particular to scan the working area with the energy beams.

Trajectories of the energy beams on the work area are controlled in such a way that the energy beams do not interact with a pollutant cloud of dirt particles, smoke or smoke, for example, regardless of whether the pollutant cloud is generated by the same energy beam or by another energy beam. The energy beams can namely otherwise scattered and/or weakened in an unpredictable manner by the pollutant cloud, which can reduce the quality of the resulting component. Furthermore, it can also reduce the quality of the resulting component if an energy beam strikes a location within the work area where pollutants are located that have been introduced from another location—in particular due to the protective gas flow. In order to correspondingly control the trajectories of the energy beams, it is proposed, for example, to monitor or simulate trajectories of the pollutant clouds. This turns out to be very expensive. It is further proposed to assign separate areas on the work area to the energy beams, which are arranged in relation to one another in such a way that pollutant clouds from one area cannot reach the other area—and vice versa. However, this severely restricts the freedom of movement of the energy beams and flexibility in the manufacture of the component. It is also proposed to discontinue the irradiation with an energy beam and to start the irradiation again after a local offset or jump if the energy beam would otherwise cross a pollutant cloud. In this way, the energy beam virtually skips the pollutant cloud. However, this is also a time-consuming and complicated procedure. Finally, it is proposed to deposit an energy beam causing a pollutant cloud in such a way that a gap is created in the pollutant cloud through which another energy beam can be shifted. However, this is also a very complicated and ultimately not very predictable and/or reproducible procedure.

The invention is based on the object of creating a manufacturing device, a method and a computer program product for the additive manufacturing of components from a powder material, the disadvantages mentioned being at least reduced, preferably avoided.

The object is achieved by providing the present technical teaching, in particular the teaching of the independent claims and the embodiments disclosed in the dependent claims and the description.

The object is achieved in particular by further developing a manufacturing device for the additive manufacturing of components from a powder material in such a way that the control device is set up to define a first irradiation area on the work area for a first energy beam of the plurality of energy beams, along which a first irradiation section for the first energy beam from a first start position to a first end position - in particular systematically, in particular along a specific Shift direction, in particular in one piece, that is, preferably without jumps between different areas of the irradiation area - is shifted within the first irradiation area. The control device is also set up to define a second irradiation area for a second energy beam of the plurality of energy beams upstream - with respect to the protective gas flow direction - of the first irradiation area on the work area, along which a second irradiation section for the second energy beam from a second starting position to a second end position--in particular systematically, in particular along a specific displacement direction, in particular in one piece, that is to say preferably without jumps between different areas of the irradiation area--within the second irradiation area. The control device is further set up to start irradiating the second irradiation area with the second energy beam if the first irradiation section and the second starting position for the second irradiation section are not arranged relative to one another within an interaction zone determined by the protective gas flow direction. In this way, it is particularly easy, in particular without complicated detection or calculation effort, to prevent the energy beams from working in the area of any pollutant clouds or in areas of deposited pollutants on the work area, while at the same time, however, there is a high degree of flexibility with regard to the arrangement of the irradiation areas relative to each other and thus also with regard to the local distribution of the treatment of the work area with the different energy beams. Last but not least, this makes it possible to use heating or preheating of the component being produced by the first energy beam during processing by the second energy beam, in order in particular to avoid distortions in the component being produced as far as possible. The energy beams can therefore in particular work comparatively close to one another without the risk of them interfering with the pollutants that are produced.

The control device is preferably set up to start irradiating the second irradiation area with the second energy beam after the start of the irradiation of the first irradiation area with the first energy beam if the first irradiation section and the second starting position for the second irradiation section relative to one another are not within a through the protective gas flow direction specific interaction zone are arranged. The second irradiation area is arranged upstream of the first irradiation area with respect to the protective gas flow direction, which means in particular that pollutants generated by the second energy beam can reach the first irradiation area with the protective gas flow. In contrast to the prior art, it is expressly not provided here that the irradiation areas are selected in such a way that no pollutants can get from one irradiation area to the other—or vice versa. Nevertheless, this has no negative effects, since the offset at the beginning of the irradiation ensures that the energy beams do not interact with the pollutants of the other energy beams.

The work area is irradiated with the energy beams at times simultaneously, but in a spatially offset manner. This means that the energy beams are at least temporarily simultaneously displaced in the work area—particularly also in the same component section—and interact with the powder material. However, they are always spatially offset from one another, so no two energy beams work on the same place on the work area at the same time.

The control device is set up in particular to move the irradiation section systematically, in particular with a defined direction of displacement, within the respective irradiation area. The control device is preferably set up to carry out this relocation in one go, i.e. without jumps, which ultimately means that the irradiation section does not initially jump over areas of the irradiation area on the way from the starting position to the end position and then jumps back there, but that areas of the irradiation area arranged one behind the other from the start position to the end position can also be irradiated one after the other in the order predetermined by the geometric position between the start position and the end position.

The second starting position is preferably arranged adjacent to the first starting position on the work area. In particular, the first starting position lies within the interaction zone of the second starting position, and/or vice versa. The offset in the beginning of the irradiation of the first irradiation area and the second irradiation area ensures that no quality defects arise due to impairments between the starting positions. The start of the irradiation of the second irradiation area can still take place so shortly after the start of the irradiation of the first irradiation area that the resulting component - especially in below a powder material layers currently being processed - has not yet cooled to such an extent that there would be a risk of quality defects due to distortions. Rather, a preheating effected by the first energy beam can be used to increase productivity and quality during the irradiation with the second energy beam.

The displacement of the second irradiation section from the second starting position to the second end position within the second irradiation area preferably takes place in the same direction, in particular with the same displacement direction, as the displacement of the first irradiation section within the first irradiation area.

An irradiation area is understood in particular as an area that is irradiated completely, in particular systematically, in particular with a defined displacement direction, in particular in one piece, in particular without jumps, with one of the energy beams, in particular without the energy beam being shifted to another irradiation area in the meantime. If an irradiation area is completely irradiated, the energy beam preferably jumps to a next irradiation area, which is then systematically irradiated with the energy beam before the energy beam in turn jumps to a further irradiation area. An irradiation area is therefore in particular a coherent area in the work area, which is swept over with the energy beam without interruption.

In contrast, an irradiation section is in particular a partial area of the irradiation area in which the energy beam irradiates the powder material arranged in the working area at a given point in time, in particular at a respective instantaneous point in time. Accordingly, the irradiation portion shifts within the irradiation area when the irradiation area is swept with the energy beam.

An interaction zone is understood in particular as an area in the work area that is affected by pollutants that have arisen at a specific location inside or outside the interaction zone, whether by a pollutant cloud or by deposited pollutants such as smoke, smoke or dirt particles. In particular, each currently processed irradiation section of an energy beam is assigned an interaction zone that is influenced by pollutants that have arisen in the irradiation section. The fact that the first irradiation section and the second starting position for the second irradiation section are not arranged relative to one another within such an interaction zone therefore means in particular that the first Irradiation section is not arranged in an interaction zone associated with the second starting position, and/or that—preferably additionally—the second starting position is not arranged in an interaction zone associated with the first irradiation section.

The fact that the interaction zone is determined by the direction of flow of the protective gas means in particular that the direction of flow of the protective gas is at least co-determining for the orientation and arrangement of the interaction zone, it preferably defining the arrangement and orientation of the interaction zone. The protective gas flow direction essentially determines where the pollutants that are produced in an irradiation section are shifted. At the same time, however, it is not necessary for the protective gas flow direction to be solely decisive for the interaction zone. Rather, the interaction zone can also extend in other directions, in particular also in some areas counter to the direction of flow of the protective gas, since, due to an initial impulse, pollutants, in particular smoke, smoke and/or spatter, can also travel at least over a limited distance against the direction of flow of the protective gas or can be shifted laterally to the shielding gas flow direction. The interaction zone can therefore be determined by further parameters in addition to the protective gas flow direction.

The method steps shown here, which are to be carried out by the control device, are preferably repeated within a powder material layer until the powder material layer has been irradiated in all regions or component sections to be irradiated. In particular, the second irradiation area is preferably a further first irradiation area for a third irradiation area, which is then in turn a new, second irradiation area in relation to the further first irradiation area, ie the preceding second irradiation area. The procedure described here can therefore in particular be iterated as desired along the powder material layer. It is possible that the different irradiation areas are exposed alternately to the first energy beam and the second energy beam; however, it is also possible for more than two energy beams to be used, for example three energy beams, or more than three energy beams.

At the same time, the procedure according to the invention or preferred according to the invention is preferably carried out again on each new powder material layer, ie repeated from powder material layer to powder material layer, until the component to be produced is built up in layers. In particular, the procedure described so far relates to precisely one layer of powder material; the different irradiation areas are thus defined in particular in the same layer of powder material, and preferably anew for each new layer of powder material.

Additive or generative manufacturing or production of a component is understood to mean in particular a layered construction of a component from powder material - powder material layer for powder material layer - in particular a powder bed-based method for producing a component in a powder bed, in particular a manufacturing method that is selected from a group consisting Selective Laser Sintering, Laser Metal Fusion (LMF), Direct Metal Laser Melting (DMLM), Laser Net Shaping Manufacturing (LNSM), and Laser Engineered Net Shaping (LENS). The production facility is therefore set up in particular to carry out at least one of the aforementioned additive or generative production processes.

An energy beam is generally understood to mean directed radiation that can transport energy. This can generally involve particle radiation or wave radiation. In particular, the energy beam propagates through the physical space along a propagation direction and thereby transports energy along its propagation direction. In particular, it is possible by means of the energy beam to deposit energy locally in the work area.

In a preferred embodiment, the energy beam is an optical working beam. An optical working beam is to be understood in particular as directed electromagnetic radiation, continuous or pulsed, which is suitable in terms of its wavelength or a wavelength range for the additive or generative manufacturing of a component from powder material, in particular for sintering or melting the powder material. In particular, an optical working beam means a laser beam that can be generated continuously or in a pulsed manner. The optical working beam preferably has a wavelength or a wavelength range in the visible electromagnetic spectrum or in the infrared electromagnetic spectrum, or in the overlap region between the infrared range and the visible range of the electromagnetic spectrum. A working area is understood to mean in particular an area, in particular a plane or surface, in which the powder material is arranged and which is locally irradiated with the energy beam in order to locally solidify the powder material. In particular, the powder material is sequentially arranged in layers in the work area and is locally irradiated with the energy beam in order to produce a component—layer by layer.

The fact that an energy beam is applied locally to the work area means in particular that the energy beam is not applied to the entire work area globally - neither instantaneously nor sequentially - but rather that the work area is covered in places, in particular at individual, connected or separate locations, with the Energy beam is applied, wherein the energy beam is shifted in particular by means of the scanner device within the work area. The fact that the energy beam is applied selectively to the work area means in particular that the energy beam is applied to the work area at selected, predetermined points or locations or in selected, predetermined areas. The working area is in particular a layer of powder material or a preferably contiguous area of a layer of powder material that can be reached by the energy beam using the scanner device, i.e. it includes in particular those points, locations or areas of the powder material layer that can be impinged on by the energy beam.

The protective gas device preferably has at least one protective gas outlet, in particular a nozzle, preferably a plurality of protective gas outlets, in particular nozzles, arranged in particular next to one another and preferably aligned parallel to one another. The at least one protective gas outlet is set up in particular to cause the protective gas to flow out of the protective gas outlet in a directed manner and thus to define the direction of flow of the protective gas.

According to a preferred embodiment, the protective gas device additionally has at least one protective gas inlet, in particular a plurality of protective gas inlets which are preferably arranged next to one another and in particular aligned parallel to one another, through which the protective gas can enter the protective gas device again from the work area. In particular, the at least one protective gas inlet is preferably arranged opposite the at least one protective gas outlet when viewed in the protective gas flow direction, with the working area being arranged between the at least one protective gas inlet and the at least one protective gas outlet. In a preferred embodiment, the Protective gas device from a suction device, in particular a pump, by means of which the protective gas can be sucked out of the work area via the at least one protective gas inlet. The direction of flow of the protective gas over the working area can be determined with particularly high precision by means of a combination of defined outflow of the protective gas from the at least one protective gas outlet and defined suction of the protective gas via the at least one protective gas inlet.

The control device is preferably selected from a group consisting of a computer, in particular a personal computer (PC), a plug-in card or control card, and an FPGA board. In a preferred embodiment, the control device is an RTC6 control card from SCANLAB GmbH, in particular in the version currently available on the date determining the seniority of the present property right.

The scanner device preferably has at least one scanner, in particular a galvanometer scanner, piezo scanner, polygon scanner, MEMS scanner, and/or a working head or processing head that can be displaced relative to the work area—preferably at least one such element assigned separately to the energy beam for each energy beam. The devices proposed here are particularly suitable for shifting the energy beams within the working area between a plurality of irradiation positions.

A working head or processing head that can be displaced relative to the work area is understood here in particular to mean an integrated component of the production facility which has at least one radiation outlet for at least one energy beam, the integrated component, i.e. the working head, as a whole along at least one displacement direction, preferably along two mutually perpendicular directions of displacement, is displaceable relative to the work area. Such a working head can, in particular, be designed in the form of a portal or be guided by a robot. In particular, the working head can be designed as a robot hand of a robot.

According to a development of the invention, it is provided that the control device is set up to determine a first blocking area, starting from the first irradiation section, which is displaced along the first irradiation section with the first irradiation section. Alternatively or additionally, a second blocking area is preferably determined by the control device, starting from the second irradiation section second irradiation section is displaced along the second irradiation area. By defining the respective blocking areas, it can be ensured in a particularly simple manner that the irradiation of the second irradiation area only begins, in particular not until the first irradiation section and the second starting position for the second irradiation section are not arranged relative to one another within the corresponding interaction zone. There is therefore no need for an explicit time-based consideration of the start of the irradiation, but rather the—possibly time-shift—can be specified implicitly via the definition of the restricted areas.

Alternatively, however, an explicit time control is also possible; or an offset is specified in the form of a number of irradiation vectors to be processed by the first energy beam, or in the form of a specific displacement distance to be completed for the first irradiation section before irradiation with the second energy beam can begin.

A blocking area is understood to be an area that is defined for a specific energy beam and thus a specific irradiation section, and into which no other energy beam may be shifted. The blocked area assigned to an irradiation section is preferably equal to the interaction zone assigned to the irradiation section or larger than the interaction zone. In particular, a safety margin for the actual interaction zone can be taken into account when defining the restricted area.

The blocking area preferably extends over a predetermined extent within the working area around the irradiation section assigned to it and—in the protective gas flow direction—downstream of the irradiation section.

According to one development of the invention, it is provided that the control device is set up to only start irradiating the second irradiation area with the second energy beam when at least one start condition is met, with the at least one start condition being selected from a group consisting of: The second starting position is not within the first restricted area; the first irradiation section is not within the second cut-off area at the second start position; and the first blocking area and the second blocking area do not overlap with each other. Each of these three conditions is particularly suited to an offset between the The beginning of the irradiation of the second irradiation area and the beginning of the irradiation of the first irradiation area are to be selected such that it is ensured that the first irradiation section and the second starting position for the second irradiation section are not arranged in the corresponding interaction zone relative to one another.

According to a preferred embodiment, the irradiation of the second irradiation area with the second energy beam is only started when at least two starting conditions, selected from the group mentioned above, are met.

According to a preferred embodiment, the irradiation of the second irradiation area with the second energy beam is only started when all three starting conditions of the above-mentioned group have been met cumulatively.

The fact that the second starting position is not in the first blocking area means in particular that the second starting position does not spatially overlap with the first blocking area; according to another preferred embodiment, this means in particular that the second starting position is not arranged completely in the first blocking area.

According to a preferred embodiment, the fact that the first irradiation section is not within the second blocked region at the second starting position means in particular that the first irradiation section does not overlap with the second blocked region at the second starting position; according to another preferred embodiment, this means in particular that the first irradiation section does not lie completely within the second restricted area at the second starting position.

The reference to the “second blocked area at the second starting position” means in particular that the second blocked area is considered as it is given when the second irradiation section is located at the second starting position.

According to one development of the invention, it is provided that the control device is set up to define the first irradiation area and the second irradiation area on the work area as being directly adjacent to one another. In particular, the first irradiation area and the second irradiation area are preferably defined on the work area such that the first irradiation area and the second irradiation area are adjacent to each other. It is possible that the first irradiation area and the second Irradiation areas butt together precisely along a defined boundary line; however, it is also possible for the first irradiation area and the second irradiation area to overlap in certain areas. If the first irradiation area and the second irradiation area are defined directly adjacent to one another, the component can be produced with particularly high quality, in particular seamlessly.

According to a development of the invention, it is provided that the control device is set up to generate the irradiation areas as strips, that is to say to generate strip-shaped irradiation areas. This configuration has turned out to be particularly advantageous for a high-quality and at the same time productive production of components. The strips or strip-shaped irradiation areas are preferably aligned parallel to one another. Preferably the strips are contiguous, most preferably without overlapping; however, an overlap is also possible, at least in certain areas.

The second irradiation area preferably extends parallel to the first irradiation area. This applies to a very special degree when the irradiation areas are designed as strips. All irradiation areas are preferably defined in such a way that they extend parallel to one another.

The displacement direction of the irradiation sections in the different irradiation areas is preferably chosen to be the same, in particular parallel and with the same orientation, at least for the first irradiation area and the second irradiation area, preferably for all irradiation areas. The irradiation is therefore preferably carried out in the same direction or in the same direction in the different irradiation areas. In particular, the second energy beam follows the first energy beam spatially and preferably with a time offset.

The control device is preferably set up to generate the irradiation areas as strips in such a way that a strip length of this strip measured in the longitudinal direction of a strip of the strips is greater than an extent of the blocking region assigned to the strip measured in the same direction, namely in the longitudinal direction of this strip. The strip or strip-shaped irradiation area therefore preferably protrudes beyond the blocking area; in particular, it is larger—at least along the longitudinal direction—than the blocking area. Therefore, the blocking area can be shifted longitudinally, particularly within the strip. The displacement direction of the irradiation section within the strip-shaped irradiation area preferably extends in the longitudinal direction of the strip.

In this case, a strip is determined in particular by the fact that it has a larger dimension in one direction on the work area than in the other direction orthogonal thereto. The direction of the larger dimension is referred to as the longitudinal direction, and the direction of the smaller dimension orthogonal thereto is referred to as the width direction. The extent or dimension along the longitudinal direction is referred to as the length; the extent or dimension along the width direction as width.

According to a development of the invention, it is provided that the control device is set up to define the irradiation areas in such a way that they are aligned transversely to the direction of flow of the protective gas. This means in particular that the irradiation areas intersect the protective gas flow direction at an angle that differs from 0° and from 180°. The angle at which the irradiation areas intersect the protective gas flow direction is preferably also different from 90° and from 270°. the

Irradiation areas thus extend particularly preferably obliquely to the flow direction of the protective gas. Preferably also extends the direction of displacement

Irradiation sections within the irradiation areas transversely, in particular obliquely, to the protective gas flow direction, in particular while avoiding the aforementioned angles.

By appropriately aligning the irradiation areas and/or the shifting directions within the irradiation areas, an influence of later irradiated locations by pollutants produced at previously irradiated locations due to the shielding gas flow direction is preferably avoided.

According to a development of the invention, it is provided that the control device is set up to carry out the irradiation of the irradiation areas with mutually parallel and/or antiparallel irradiation vectors which are processed one after the other along the displacement direction of the respective irradiation section. The irradiation vectors of the same irradiation area have in particular an identical orientation to one another, or they have an orientation opposite to one another, ie rotated by 180°, ie they are oriented identically or in particular alternately inversely to one another. In particular, it is possible in a preferred embodiment for radiation vectors that are directly adjacent to one another to be oriented antiparallel to one another. The irradiation of a The irradiation area takes place in particular in such a way that the associated energy beam sweeps over it successively and in direct time sequence of the directly adjacent irradiation vectors in the form of parallel or anti-parallel irradiation vectors arranged next to one another. The irradiation section is in particular the area of the irradiation vector that is currently being generated. The direction of displacement of the irradiation section is thus given in particular by the sequence in which the irradiation vectors generated sequentially in time are processed. The irradiation vectors are preferably oriented perpendicularly to the displacement direction; to put it the other way around, the displacement direction of the irradiation section is preferably perpendicular to the individual irradiation vectors.

An irradiation vector is understood to mean, in particular, a continuous, linear displacement of the energy beam within an irradiation area over a specific distance with a specific displacement direction, in particular in the width direction of an irradiation area designed as a strip. The irradiance vector thus includes the direction or orientation of the displacement as its orientation. An irradiation area is in particular sequentially covered with a large number of irradiation vectors.

The fact that the displacement takes place continuously means in particular that it takes place without dropping or interrupting the energy beam, in particular without a jump. The fact that the irradiation takes place linearly means in particular that it takes place along a straight line.

If the irradiation areas are designed as strips, the irradiation vectors preferably extend in the width direction of the respective strip, ie perpendicular to the longitudinal extension of the strip. The irradiation vector preferably extends along the entire width of the strip-shaped irradiation area. The width of the irradiation area thus preferably defines the length of the irradiation vector. In particular, a strip-shaped irradiation area is preferably sequentially swept over with a multiplicity of irradiation vectors aligned in the width direction and offset from one another in the longitudinal direction of the irradiation area or arranged next to one another.

The control device is preferably set up to block a first angular range of 60° to 120° and a second angular range of 240° to 300° to the protective gas flow direction for the irradiation vectors. In this way, it can be advantageously ensured in particular that the direction of displacement of the irradiation sections is such is aligned so that the work area can be processed simultaneously by several energy beams in adjacent irradiation areas at times, but with a spatial and preferably temporal offset, without the energy beams being affected alternately by the pollutants they produce due to the protective gas flow. Here, before and below, the time offset relates to a start of the irradiation with the different energy beams and is therefore not in contradiction to a temporary simultaneous irradiation.

The control device is preferably set up to set an angle between the protective gas flow direction and the irradiation vectors of an irradiation area of between 22.5° and 60° inclusive, or between 120° and 240° inclusive, or between 300° and 337.5 inclusive ° to choose. The control device is preferably set up to select an angle between the protective gas flow direction and the irradiation vectors of an irradiation area of between 20° and 60° inclusive, or between 120° and 240° inclusive, or between 300° and 340° inclusive.

The control device is preferably set up to select the orientation of the irradiation vectors in such a way that it is at least partially directed in the opposite direction to the direction of flow of the protective gas. In this way, it can advantageously be ensured that the irradiation takes place locally in such a way that places irradiated later in time are not adversely affected by pollutants which originate from places irradiated earlier due to the protective gas flow. The term “component-by-component” means that the direction of displacement in the case of vectorial decomposition always has a vectorial component that is aligned opposite to the direction of flow of the protective gas.

The control device is preferably set up to cover angular ranges from 70° to 110° and from 250° to 290°, preferably from 80° to 100° and from 260° to 280°, preferably from 85° to 95° and from 265° to 275° °, preferably from 88° to 92° and from 268° to 272°.

According to a development of the invention, it is provided that the control device is set up to block an angular range of 150° to 210° to the protective gas flow direction for the direction of displacement of the irradiation sections within the respectively assigned irradiation area from the respective start position to the respective end position. This makes it possible in a particularly favorable manner that the first energy beam and the second energy beam with a spatial and preferably temporal offset, but at times simultaneously, can process adjacent irradiation areas without being exposed to mutual pollution due to the protective gas flow.

The control device is preferably set up to block an angular range of 160° to 200°, preferably 170° to 190°, preferably 175° to 185°, preferably 178° to 172°.

In addition, an angle range of +22.5° to −22.5°, that is to say in other words from 337.5° to 22.5°, preferably from 340° to 20°, to the protective gas flow direction is preferably blocked for the displacement direction . In this way, in particular, it is possible to avoid adversely affecting locations that are irradiated later by pollutants from locations that were previously irradiated, even within the individual irradiation areas.

The control device is preferably set up to select an angle between the protective gas flow direction and the displacement direction of between 22.5° and 150° inclusive, or between 210° and 337.5° inclusive. In this way, both criteria in particular can advantageously be taken into account: on the one hand, adequate avoidance of impairment of later irradiated locations by pollutants from previously irradiated locations, also within the individual irradiation areas, on the other hand, the alignment of the shifting direction of the irradiation sections in such a way that an undisturbed, spatial and preferably staggered but at times simultaneous irradiation of the work area with the various energy beams can take place. The control device is preferably set up to select an angle between the protective gas flow direction and the displacement direction of between 20° and 150° inclusive, or between 210° and 340° inclusive.

Efficient irradiation of the work area with a plurality of energy beams is thus preferably ensured in particular by defining certain blocked angle areas or blocked angle zones for the direction of displacement of the irradiation sections.

According to a further development of the invention, it is provided that the control device is set up to specify the direction of displacement in such a way that the direction of displacement is at least partially directed in the opposite direction to the direction of flow of the protective gas. In particular in this way it can be advantageously avoided that at a later time Point in time irradiated locations within an exposure area are affected by pollutants originating from previously irradiated locations in the same exposure area. But at least such an impairment can be reduced. Here, too, the term “component-by-component” means that the direction of displacement in the case of vectorial decomposition has a vectorial component that is aligned opposite to the direction of flow of the protective gas.

The control device is preferably set up to irradiate the working area with the plurality of energy beams for a plurality of powder material layers to be irradiated, in particular sequentially one after the other, and to align the irradiation areas, in particular the direction of displacement of the irradiation sections, for at least one, preferably for each of a preceding one Powder material layer subsequent powder material layer of powder material layers to choose differently than for the previous powder material layer. An orientation is understood here to mean an angle which a specific direction, in particular the longitudinal direction, of an irradiation area encloses with a predetermined axis on the work area. If the irradiation areas are in the form of strips, the orientation is in particular an angle which the longitudinal direction of the irradiation areas, which are preferably parallel to one another, encloses with a predetermined axis on the work area. By changing the alignment of the irradiation areas from the preceding powder material layer to the following powder material layer, in particular from powder material layer to powder material layer, an identically aligned irradiation—in particular directly—of adjacent powder material layers is avoided, which in turn increases component quality. In particular, the strip-shaped irradiation areas of two successive arrangements preferably enclose a finite angle with one another, in particular different from 0° and from 180°.

Especially with this procedure, the previously described angles of blocking are preferably taken into account.

According to a preferred embodiment, the orientation of the irradiation areas is rotated from powder material layer to powder material layer by a predetermined angle. Preferably, however, it is checked whether the instantaneous angle falls within one of the angle blocking ranges described above; if so, the angle is discarded and a another angle is selected, for example by rotating again by the predetermined angle.

According to a development of the invention, it is provided that the control device is set up to define more than two irradiation areas for more than two energy beams. This enables a particularly fast and efficient production of a component. In particular, the beam generating device is preferably set up to generate more than two energy beams, in particular three energy beams, in particular four energy beams, or more than four energy beams, with the scanner device preferably being set up to scan the working area locally selectively with more than two energy beams, in particular with to irradiate three energy beams, in particular with four energy beams, or with more than four energy beams, preferably with all available energy beams of the beam generating device, at least at times simultaneously, but spatially offset.

In this case, a separate irradiation area is assigned to each energy beam, wherein in particular irradiation areas directly adjacent to one another are preferably always assigned to different energy beams. In this respect, a third irradiation area, which is assigned to a third energy beam, is preferably directly adjacent to the second irradiation area, which is assigned to the second energy beam, on a side facing away from the first irradiation area. A fourth irradiation area can optionally be assigned to this in turn on a side facing away from the second irradiation area, which is then assigned to a fourth energy beam or again to the first energy beam. It is obvious that this can be continued for any number of energy beams. In each case, a subsequent irradiation area is irradiated with the subsequent energy beam—preferably after the start of the irradiation of the preceding irradiation area with the preceding energy beam—if the preceding irradiation section and the subsequent starting position for the subsequent irradiation section relative to one another are not within the defined by the protective gas -Flow direction specific interaction zone are arranged. Correspondingly, the criteria explained above, in particular the blocking areas and/or the starting conditions, are then preferably also applied analogously, as was described above in connection with the first irradiation area and the second irradiation area. In this respect, the procedure previously described in connection with the first irradiation area and the second irradiation area is Principle to understand that can be applied to any number of different energy beams and different irradiation areas and in particular iterated.

According to a further development of the invention, it is provided that the control device is set up to determine at least one blocking area, selected from the blocking areas, in such a way that the at least one blocking area has a predetermined—particularly finite—extent in the protective gas flow direction. This is based on the idea that material transport, in particular transport of pollutants, by the flow of protective gas may only take place - at least to a relevant extent - over a certain distance, so that the blocked area in the direction of the flow of protective gas does not necessarily have to extend to a working area limit of the working area. This allows the simultaneous use of an energy beam at a location downstream of the irradiation section assigned to a restricted area, provided this location is located beyond a restricted area boundary, ie outside the restricted area as seen in the protective gas flow direction. The flexibility of the production facility can be increased as a result.

Alternatively, it is preferably provided that the control device is set up to determine the at least one blocking area in such a way that it extends in the protective gas flow direction up to the working area limit. This can be particularly useful for small work areas, or it leads to a simplification of the determination of the blocked area, with no potentially variable parameters such as a transport distance of pollutants with the protective gas flow having to be taken into account when determining the blocked areas. The production facility can thus be configured more simply.

The blocking area preferably has a predetermined—particularly finite—extension opposite to the direction of flow of the protective gas and/or perpendicular to the direction of flow of the protective gas, the extent being selected in particular as a function of at least one material and/or processing parameter. It extends in particular within the working area around the irradiation section assigned to it and—in the direction of flow of the protective gas—downstream of the irradiation section. In particular in the area of a local environment around the assigned irradiation section, smoke, smoke and/or spatter and possibly other pollutants can also be transported laterally to the direction of flow of the protective gas or counter to the direction of flow of the protective gas. The object is also achieved by creating a method for additively manufacturing a component from a powder material by means of a manufacturing device according to the invention or a manufacturing device according to one of the preceding claims. A work area is locally selectively irradiated with a plurality of energy beams in order to use the energy beams to produce the component from the powder material arranged in the work area, with a protective gas flow having a specific protective gas flow direction being generated over the work area. For a first energy beam of the plurality of energy beams, a first irradiation area is defined on the work area along which a first irradiation section for the first energy beam is shifted from a first start position to a first end position within the first irradiation area. For a second energy beam of the plurality of energy beams, a second irradiation area is defined on the work area along which a second irradiation section for the second energy beam is shifted from a second start position to a second end position within the second irradiation area. Irradiation of the second irradiation area with the second energy beam is started - preferably after the irradiation of the first irradiation area with the first energy beam - if the first irradiation section and the second starting position for the second irradiation section relative to one another are not within an interaction zone determined by the protective gas flow direction are arranged. In connection with the method, the advantages that have already been explained in connection with the production facility are realized in particular.

According to a development of the invention, it is provided that, starting from the first irradiation section, a first blocking area is determined, which is displaced along the first irradiation area with the first irradiation section. Alternatively or additionally, starting from the second irradiation section, a second blocking area is determined, which is shifted with the second irradiation section along the second irradiation area.

According to a development of the invention, it is provided that the irradiation of the second irradiation area with the second energy beam is only started when at least one start condition is met, which is selected from a group consisting of: the second start position is not within the first blocking area; the first irradiation section is located not within the second restricted area at the second start position, and the first restricted area and the second restricted area do not overlap with each other.

At least one preferred embodiment of the method comprises at least one method step that has already been described above in connection with the production facility as a configuration according to the invention or as a preferred embodiment.

In particular, the first irradiation area and the second irradiation area are preferably defined directly adjacent to one another on the work area, in particular in such a way that the first irradiation area and the second irradiation area adjoin one another.

The irradiation areas are preferably produced as strips, in particular in such a way that a strip length of the strip measured in the longitudinal direction of a strip of the strips is greater than an extent of the blocking region assigned to the strip, measured in the longitudinal direction.

The irradiation areas are preferably irradiated with mutually parallel or antiparallel irradiation vectors, which are processed one after the other along the displacement direction. A first angular range of 60° to 120° and a second angular range of 240° to 300° to the protective gas flow direction are preferably blocked for the irradiation vectors.

The irradiation vectors are preferably aligned at least component-by-component against the protective gas flow direction.

An angular range of 150° to 210° to the flow direction of the protective gas is preferably blocked for the displacement direction.

Preferably, the direction of displacement of the irradiation section within the respectively assigned irradiation area from the respective starting position to the respective end position is predetermined such that the direction of displacement is at least partially opposite to the direction of flow of the protective gas.

More than two irradiation areas are preferably defined for more than two energy beams. At least one blocking area is preferably determined in such a way that the at least one blocking area has a predetermined--in particular finite--extension in the protective gas flow direction or extends to a working area limit of the working area. The blocking area is preferably determined in such a way that it has a predetermined--in particular finite--extension opposite to the direction of flow of the protective gas and/or perpendicular to the direction of flow of the protective gas.

A laser is preferably used as the beam generating device.

The component is preferably manufactured by means of selective laser sintering and/or selective laser melting.

In particular, a metallic or ceramic powder can preferably be used as the powder material.

The object is also achieved by creating a computer program product which has machine-readable instructions, on the basis of which a method according to the invention or a method according to one of the embodiments described above is carried out on a computing device, in particular a control device, when the computer program product is running on the computing device. In connection with the computer program product, there are in particular the advantages that have already been explained in connection with the planning device.

The invention is explained in more detail below with reference to the drawing. show:

FIG. 1 shows an exemplary embodiment of a manufacturing device for the additive manufacturing of components from a powder material;

FIG. 2 shows a schematic representation of a first embodiment of a method for additively manufacturing a component, and

FIG. 3 shows a schematic representation of a second embodiment of a method for additively manufacturing a component.

1 shows a schematic representation of an exemplary embodiment of a manufacturing device 1 for the additive manufacturing of a component 3 from a powder material. the Manufacturing facility 1 has a beam generating device 5, which is set up to generate a plurality of energy beams 7. The beam generating device 5 can have a plurality of lasers, for example, or a laser that interacts with a beam splitting device, for example a beam splitter, in order to of energy beams 7 to generate. In a preferred embodiment, the energy beams 7 are in the form of laser beams.

The production device 1 also has a scanner device 9, which is set up to irradiate a work area 11 locally and selectively with the energy beams 7 at least temporarily in order to use the energy beams 7 to produce the component 3 from the powder material arranged in the work area 11. The scanner device 9 can in particular have a separately controllable scanner 13 for each energy beam 7, for example a galvo scanner.

The production facility 1 also has a protective gas device 15, which is set up to induce a flow of protective gas with a defined direction of flow of the protective gas--shown here by the first arrows PI, with only one of the first arrows being marked with the corresponding reference number for the sake of clarity to generate the workspace 11.

In addition, the production device 1 has a control device 17 which is operatively connected to the scanner device 9, here in particular to the individual scanners 13, and is set up to control the scanner device 9, in particular the individual scanners 13 separately.

The control device 17 is also set up to define a first irradiation area 19.1 of a plurality of irradiation areas 19 on the work area 11 for a first energy beam 7.1 of the plurality of energy beams 7, with a first irradiation section 21.1 of a plurality of irradiation sections 21 moving from a first starting position to a first end position within the first irradiation area 19.1 along the first irradiation area 19.1. For a second energy beam 7.2 of the plurality of energy beams 7, a second irradiation area 19.2 is upstream - with respect to the protective gas flow direction - of the first irradiation area 19.1 on the work area 11 defined, along the second irradiation area 19.2 a second Irradiation section 21.2 for the second energy beam 7.2 is shifted from a second starting position to a second end position within the second irradiation region 19.2.

Furthermore, the control device 17 only starts irradiating the second irradiation area 19.2 with the second energy beam 7.2 - preferably after the start of the irradiation of the first irradiation area 19.1 with the first energy beam 7.1 - if the first irradiation section 21.1 and the second starting position for the second Irradiation section 21.2 are no longer arranged relative to one another within an interaction zone determined by the protective gas flow direction. In this way, it can advantageously be prevented that the irradiation areas 19 are mutually negatively influenced by pollutants that arise in the respective other irradiation area 19 during irradiation with the energy beams 7 and are conveyed by the protective gas flow over the work area 11 - in particular in the protective gas flow direction will. In addition, this procedure enables the energy beams 7 to be able to simultaneously irradiate the work area 11 comparatively close to one another at times, so that high efficiency and at the same time good quality, in particular a structure of the component 3 that is as seamless as possible, can be achieved. In particular, preheating of the component 3 being produced by the first energy beam 7.1 can advantageously be used during irradiation by means of the second energy beam 7.2.

In particular, a first blocking area 23.1 of a plurality of blocking areas 23 is determined by the control device 17, preferably starting from the first irradiation section 21.1, which is displaced with the first irradiation section 21.1 along the first irradiation area 19.1. Alternatively or additionally, starting from the second irradiation section 21.2, a second blocking area 23.2 is determined, which is displaced with the second irradiation section 21.2 along the second irradiation area 19.2.

The irradiation of the second irradiation area 19.2 with the second energy beam 7.2 is preferably only started when at least one start condition selected from a group consisting of: the second start position is not in the first blocked area 23.1; the first irradiation section 21.1 is not within the second blocked region 23.2; and the first blocking area 23.1 and the second blocking area 23.2 do not overlap with each other. The irradiation of the second irradiation area 19.2 is preferably only started when at least two of the stated conditions are met. Preference is given to Irradiation of the second irradiation area 19.2 only started when all three conditions are met.

The first irradiation area 19.1 and the second irradiation area 19.2 are preferably defined directly adjacent to one another on the work area 11, in particular in such a way that the first irradiation area 19.1 and the second irradiation area 19.2 adjoin one another.

The irradiation areas 19 are preferably produced as strips, in particular in such a way that a strip length of this strip measured in the longitudinal direction of this strip is greater than an extent of the blocking region 23 assigned to the strip, measured in the same longitudinal direction.

The irradiation areas 19 are preferably aligned transversely to the protective gas flow direction, in particular obliquely to the protective gas flow direction.

The blocking areas 23 are preferably determined in such a way that they extend in the protective gas flow direction up to a working area limit 25 of the working area 11, or have a predetermined extension in the protective gas flow direction. The blocking areas 23 are preferably determined in such a way that they have a predetermined extension counter to the direction of flow of the protective gas and/or perpendicular to the direction of flow of the protective gas.

FIG. 2 shows a schematic representation of a first embodiment of a method for additively manufacturing a component 3 from a powder material, with the manufacturing device 1 according to FIG. 1 preferably being used within the scope of the method.

Elements that are the same and have the same function are provided with the same reference symbols in all figures, so that reference is made to the previous description in each case.

In particular, the method steps already described above in connection with the production device 1, at least implicitly or explicitly, are carried out as part of the method. It is shown here in particular that more than two irradiation areas 19 for more than two energy beams 7 are defined in a preferred embodiment. In this respect, three energy beams 7 are shown here purely schematically, namely a first energy beam 7.1, a second energy beam 7.2 and a third energy beam 7.3, as well as a first irradiation area 19.1, a second irradiation area 19.2 and a third Irradiation area 19.3. Nothing else applies to the irradiation of the first irradiation area 19.1 and the second irradiation area 19.2 than what was explained above in connection with FIG. 1; for the beginning of the irradiation of the third irradiation area 19.3, the procedure is as if the second irradiation area 19.2 were the associated first irradiation area and as if the third irradiation area 19.3 were a correspondingly assigned second irradiation area. The method is therefore iterated in a simple manner for further, additional irradiation areas 19 and energy beams 7 . The blocking areas 23 assigned to the irradiation areas 19 are also shown.

3 shows a schematic representation of a second embodiment of the method.

In a) a situation is shown in which the orientation of a strip-shaped irradiation area 19 and thus at the same time a displacement direction of the irradiation section 21 in the irradiation area 19 occupies a very acute angle with the direction of flow of the protective gas--again represented here by the first arrow PI. The direction of displacement is preferably aligned parallel to the longitudinal direction of the strip-shaped irradiation area 19 and preferably runs at least partially against the direction of flow of the protective gas, specifically here in particular from top right to bottom left. Also shown is the blocking area 23, which results from the irradiation section 21 in this situation. It is clear here that the blocking area 23 overlaps with adjacent irradiation areas 19 in such an orientation of the irradiation area 19 in every position of the irradiation section 21 . A processing of an immediately adjacent irradiation area 19 by a further energy beam 7 can therefore not be released at any point in time. This significantly reduces the flexibility of using the energy beams 7 and thus at the same time the efficiency of the production of the component 3.

In order to avoid this, preferably for the orientation of the irradiation areas 19 or - which is preferred, at least for strip-shaped irradiation areas 19, has the same meaning - for the direction of displacement, angle blocking areas are defined, i.e. areas of forbidden angles, which the orientation of the irradiation areas 19 or the direction of displacement with the inert gas flow direction must not take. Of course, positive angular ranges can also be defined in a completely analogous manner, which may be assumed solely by the alignment of the irradiation areas 19 or the direction of displacement relative to the protective gas flow direction. In b) a situation is shown in which the besieged areas 19 are aligned relative to the protective gas flow direction - again shown by the first arrow PI - in such a way that the immediately adjacent irradiation areas 19 can at least temporarily be treated simultaneously by different energy beams 7.

Corresponding options for defining such angular ranges are shown in c).

The irradiation areas 19 are preferably swept over with mutually parallel or antiparallel irradiation vectors 27, which are processed one after the other along the displacement direction represented here by a second arrow P2. The irradiation vectors 27 of the same irradiation area 19 have an orientation which is identical to one another or alternately rotated by 180°. The irradiation vectors 27 and the second arrow P2 indicating the direction of displacement are also shown schematically in b) for better clarification and drawn into the third irradiation area 19.3 there. It becomes clear that the displacement direction is preferably aligned perpendicularly to the irradiation vectors 27, with the irradiation vectors 27 preferably extending in the width direction of the strip-shaped irradiation regions 19, preferably over an entire width. The width of the irradiation areas 19 thus defines the length of the irradiation vectors 27.

In c), different angle blocking areas are shown, namely two first, cross-hatched angle blocking areas 29 for the irradiation vectors 27, i.e. angle areas which the irradiation vectors 27 must not assume relative to the protective gas flow direction, which is also shown here by the first arrow PI.

In particular, a first angular range of 60° to 120° and a second angular range of 240° to 300° to the protective gas flow direction are blocked as first angular blocking regions 29 for the radiation vectors 27 .

In addition, a third angular range of 337.5° to 22.5°, preferably 340° to 20°, is blocked for the irradiation vectors 27 so that they are not aligned too much in the protective gas flow direction.

The irradiation vectors 27 are preferably at least partially directed in the opposite direction to the flow direction of the protective gas. A second angle blocking area 31 is shown simply hatched, which is defined for the direction of displacement--shown by the second arrow P2. In particular, this second angular blocking area 31 is blocked from 150° to 210° to the protective gas flow direction for the displacement direction of the irradiation sections 21 within the respectively assigned irradiation area 19 from the respective start position to the respective end position.

In addition, the third angle range of 337.5° to 22.5°, preferably of 340° to 20°, is preferably also blocked for the direction of displacement, which is shown as the third angle blocking range 33 with single hatching. This effectively prevents the displacement direction from being aligned too strongly in the protective gas flow direction, with pollutants occurring at previously irradiated locations being carried into later irradiated locations due to the protective gas flow.

The direction of displacement is preferably specified in such a way that it is at least partially in the opposite direction to the direction of flow of the protective gas.

The third angle blocking area 33 is particularly preferably blocked both for the displacement directions and for the irradiation vectors 27 .

Claims

EXPECTATIONS

1. Manufacturing device (1) for the additive manufacturing of components (3) from a powder material, with

- a beam generating device (5) which is set up to generate a plurality of energy beams (7), a scanner device (9) which is set up to irradiate a work area (11) locally selectively with the energy beams (7) at least temporarily in order to using the energy beams (7) to produce a component (3) from the powder material arranged in the work area (11),

- A protective gas device (15), which is set up to generate a protective gas flow with a defined protective gas flow direction (PI) over the work area (11), and with

- A control device (17) which is operatively connected to the scanner device (9) and set up in order to control the scanner device (9), wherein

- the control device (17) is further set up to:

For a first energy beam (7.1) of the plurality of energy beams (7), to define a first irradiation area (19.1) on the work area (11), along which a first irradiation section (21.1) for the first energy beam (7.1) from a first starting position to a first end position within the first irradiation area (19.1); for a second energy beam (7.2) of the plurality of energy beams (7) to define a second irradiation area (19.2) upstream of the first irradiation area (19.1) on the work area (11), along which a second irradiation section (21.2) for the second energy beam (7.2 ) is shifted from a second start position to a second end position within the second irradiation area (19.2), and around

- starting irradiation of the second irradiation area (19.2) with the second energy beam (7.2) if the first irradiation section (21.1) and the second starting position for the second irradiation section (21.2) are not relative to one another are arranged within an interaction zone determined by the protective gas flow direction.

2. Production device (1) according to claim 1, wherein the control device (17) is set up to

- starting from the first irradiation section (21.1), to determine a first blocking area (23.1) which is displaced with the first irradiation section (21.1) along the first irradiation area (19.1), and/or around

- Starting from the second irradiation section (21.2), a second blocking area

(23.2) which is displaced with the second irradiation section (21.2) along the second irradiation region (19.2).

3. Production device (1) according to claim 2, wherein the control device (17) is set up to

- The irradiation of the second irradiation area (19.2) with the second energy beam

(7.2) to begin only when at least one starting condition selected from a group consisting of: the second starting position is not in the first restricted area (23.1); the first irradiation section (21.1) is not within the second restricted area (23.2) at the second start position; and the first blocking area (23.1) and the second blocking area (23.2) do not overlap with each other.

4. Production device (1) according to one of the preceding claims, wherein the control device (17) is set up to define the first irradiation area (19.1) and the second irradiation area (19.2) directly adjacent to one another on the work area (11), in particular such that the first irradiation area (19.1) and the second irradiation area (19.2) adjoin one another.

5. Production device (1) according to one of the preceding claims, wherein the control device (17) is set up to generate the irradiation regions (19) as strips, in particular such that a strip length of the strip measured in the longitudinal direction of a strip of the strips is greater than one Extension of the restricted area (23) associated with the strip, measured in the longitudinal direction.

6. Manufacturing device (1) according to one of the preceding claims, wherein the control device (17) is set up to define the irradiation areas (19) so that they are aligned transversely to the flow direction of the protective gas.

7. Manufacturing device (1) according to one of the preceding claims, wherein the control device (17) is set up to carry out the irradiation of the irradiation areas (19) with mutually parallel and/or antiparallel irradiation vectors (27) which are processed one after the other along the displacement direction, wherein the control device (17) is also set up to block a first angular range of 60° to 120° and a second angular range of 240° to 300° to the protective gas flow direction for the irradiation vectors (27).

8. Production device (1) according to one of the preceding claims, wherein the control device (17) is set up to cover an angular range of 150° to 210° to the protective gas flow direction for a displacement direction of the irradiation sections (21) within the respectively assigned irradiation area (19 ) from the respective start position to the respective end position.

9. Manufacturing device (1) according to any one of the preceding claims, wherein the control device (17) is set up to specify the direction of displacement so that the direction of displacement is at least partially opposite to the protective gas flow direction.

10. Manufacturing device (1) according to one of the preceding claims, wherein the control device (17) is set up to define more than two irradiation regions (19) for more than two energy beams (7).

11. Production device (1) according to one of the preceding claims, wherein the control device (17) is set up to determine at least one blocked area (23), selected from the blocked areas (23), in such a way that the at least one blocked area (23) in Protective gas flow direction has a predetermined extent or extends up to a working area limit (25) of the working area (11).

12. A method for additively manufacturing a component (3) from a powder material by means of a manufacturing device (1) according to any one of the preceding claims, wherein a work area (11) is locally selectively irradiated with a plurality of energy beams (7) in order to use the energy beams (7) to produce the component (3) from the powder material arranged in the work area (11), with a flow of protective gas over the work area (11). a specific protective gas flow direction (PI), a first irradiation area (19.1) being defined on the work area (11) for a first energy beam (7.1) of the plurality of energy beams (7), along which a first irradiation section (21.1) for the first energy beam (7.1) is shifted from a first starting position to a first end position within the first irradiation area (19.1), with a second energy beam (7.2) of the plurality of energy beams (7) having a second irradiation area (19.2) upstream of the first irradiation area ( 19.1) is defined on the working area (11), along which a second irradiation section (21.2) for the second energy ray (7.2) is shifted from a second start position to a second end position within the second irradiation area (19.2), and wherein

- an irradiation of the second irradiation area (19.2) with the second energy beam (7.2) is started if the first irradiation section (21.1) and the second starting position for the second irradiation section (21.2) are not arranged relative to one another within an interaction zone determined by the protective gas flow direction are.

13. The method of claim 12, wherein

- Starting from the first irradiation section (21.1), a first blocking area (23.1) is determined, which is displaced with the first irradiation section (21.1) along the first irradiation area (19.1), and/or wherein

- Starting from the second irradiation section (21.2), a second blocking area (23.2) is determined, which is shifted with the second irradiation section (21.2) along the second irradiation area (19.2).

14. The method according to claim 13, wherein the irradiation of the second irradiation area (19.2) with the second energy beam (7.2) is only started when at least one start condition selected from a group consisting of: the second start position is not in the first restricted area (23.1); the first irradiation section (21.1) is not within the second restricted area (23.2) at the second starting position; and the first blocking area (23.1) and the second blocking area (23.2) do not overlap with each other.

15. Computer program product, comprising machine-readable instructions, on the basis of which a method according to one of claims 12 to 14 is carried out on a computing device when the computer program product runs on the computing device.