EP4543612A1 - Verfahren zur planung der lokalen verfestigung einer schicht pulverförmigen materials bei der schichtweisen fertigung eines dreidimensionalen objekts - Google Patents
Verfahren zur planung der lokalen verfestigung einer schicht pulverförmigen materials bei der schichtweisen fertigung eines dreidimensionalen objektsInfo
- Publication number
- EP4543612A1 EP4543612A1 EP23730079.3A EP23730079A EP4543612A1 EP 4543612 A1 EP4543612 A1 EP 4543612A1 EP 23730079 A EP23730079 A EP 23730079A EP 4543612 A1 EP4543612 A1 EP 4543612A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inskin
- vector
- downskin
- vectors
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
- B22F10/385—Overhang structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- Solidification of the powdery material is to take place with the high-energy beam, at least one inskin area and at least one downskin area is determined, An inskin pattern is defined for each inskin area, which in the inskin area represents the geometric progression of a large number of inskin patterns.
- Vectors for the high energy beam are determined, and for each downskin region a downskin pattern is defined, which in the downskin region defines the geometric progression of a plurality of downskin vectors for the
- High energy beam defines, the definition of the inskin pattern or patterns within the at least one
- Step A processing order of all inskin vectors and downskin
- the layer to be processed is typically divided into parts in which the vectors and/or the associated parameters of the high-energy beam are selected differently. What is important here is a distinction between inskin areas and downskin areas.
- the inskin area is understood to mean in particular a section of the layer to be processed, which is positioned on a part of an underlying powder layer which is solidified during the production of the object.
- a downskin area is understood to mean, in particular, a section of the layer to be processed that is positioned on a part of an underlying powder layer that remains unsolidified during the production of the object.
- Downskin vectors are used to process a downskin area. Accordingly, to process an inskin area, inskin vectors are used, which can differ from the downskin vectors, for example with regard to their line energy or their length.
- EP 3 563 203 B1 discloses a method for producing an object layer by layer, wherein a layer of the object has a sandwich area and a downskin area adjacent to the sandwich area.
- a high-energy beam is initially guided along parallel hatch lines in one of these two areas in order to solidify the area in question.
- the high-energy beam is then guided in a corresponding manner along parallel hatch lines in the other of the two areas in order to also to solidify other areas. So the solidification of one area is completed before the solidification of the other area begins.
- Such a procedure is comparatively easy to implement.
- a method is also disclosed in which a high-energy beam is guided along continuous hatch lines over the boundary lines between a downskin area and a sandwich area, with a change between the downskin area Area and the sandwich area beam parameters of the high energy beam can be changed to adapt to the respective area.
- Such a method is intended to reduce thermal stresses at the interface between the downskin area and the sandwich area.
- the US 9676032 B2 relates to a method for layer-by-layer production of a three-dimensional object, wherein a first area of a powder layer is exposed with parallel scan lines in a first direction and a second area in a second direction with parallel scan lines is exposed by a high-energy beam is exposed. In this case, a scan line in the first area is exposed or melted immediately before a scan line in the second area. After applying another layer of powder, the first area is exposed on parallel scan lines in a third direction and the second area on parallel scan lines in a fourth direction. This process is intended to reduce the time required to produce the object.
- the method according to the invention is characterized in that in step c) a plurality of inskin vector blocks and a plurality of downskin vector blocks are defined, a respective inskin vector block comprising one or more of the inskin vectors that are to be processed sequentially, and a respective downskin vector block comprises one or more of the downskin vectors, which are to be processed sequentially, and a vector block sequence for processing the inskin vector blocks and the downskin vector blocks, hereinafter referred to collectively as vector blocks, is determined, in which inskin vector blocks and downskin vector blocks alternate.
- the alternating processing of the inskin blocks and the downskin blocks according to the invention reduces the risk of local overheating of the contiguous area of the layer while saving waiting times.
- the downskin area is particularly susceptible to local overheating because heat dissipation through unsolidified powder in underlying layers is lower than through solidified powder.
- the invention reduces the risk of overheating, particularly in the downskin area, since the material in the downskin area can cool down again after a downskin block has been processed, while the inskin block following the downskin block in the vector block sequence is being processed.
- a time interval for cooling the downskin area after processing a downskin block is at least partially used in the process for processing an inskin block, which means waiting times in which the contiguous area of the layer is not exposed due to the risk of overheating , can be shortened or even eliminated entirely. This accelerates the exposure of the contiguous area without reducing the quality of the processing of the inskin areas and downskin areas.
- a vector inskin vector or downskin vector
- a vector block typically includes 1 to 10 vectors, often just a single vector or two vectors.
- each layer typically at least 10, usually dozens or hundreds of inskin vectors and at least 10, usually dozens or hundreds of downskin vectors are formed.
- at least 5, and usually at least 10, inskin vector blocks and furthermore at least 5, and usually at least 10, downskin vector blocks are formed for a contiguous area of the layer.
- the determination of the inskin patterns and the downskin patterns is independent of one another in particular in that no information about the inskin patterns (and in particular the position of individual inskins) is required for the determination of the downskin patterns (and in particular the position of individual downskin vectors). vectors) is needed or applied, and vice versa.
- knowledge of the geometry (extent/extension) of the associated inskin area or downskin area is essentially sufficient. For example, it is possible to choose completely different patterns for downskin and inskin (e.g. offset filling, stripe or checkerboard pattern).
- the independent determination of downskin and inskin patterns does not exclude the possibility that there are parameters that apply to both (and all other) patterns, e.g. the orientation of stripes formed by the vectors or the position of the origin from which the area to be exposed is divided into strips.
- the inskin patterns and downskin patterns can be determined independently of one another in that adjacent inskin vectors in the inskin pattern are at least predominantly at a different distance from one another than adjacent downskin vectors in the downskin pattern and/or the inskin vectors at least are predominantly aligned obliquely to the downskin vectors.
- the contiguous area to be exposed has a contour, with the high-energy beam being able to move along the contour as part of the manufacturing process.
- the contour travel is determined by one or more vectors which are arranged adjacent to the contour and aligned along the contour.
- the exposure in the downskin area can be a Include contour travel and provide appropriate downskin vectors.
- a preferred variant of the method according to the invention is characterized in that in step c) the vector blocks are defined in such a way that at least predominantly for two consecutive vector blocks in the vector block sequence, a respective end point of the last vector of the earlier vector block is spatially spaced in the layer from a starting point of the first vector of the later vector block.
- the downskin area and the inskin area are exposed alternately, with a distance in the vector block sequence between the end point of the last vector of the earlier vector block in the layer and the starting point of the first vector of the later vector block on which while When changing between the vector blocks, no irradiation by the high-energy beam takes place.
- this is referred to in particular as discontinuous exposure.
- a sufficiently large distance between the aforementioned end point and the aforementioned starting point reduces the heat exchange between a previously exposed sub-area and a subsequently exposed sub-area of the contiguous area.
- the powder in the contiguous area is only heated locally in a sub-area determined by a vector block and can cool down again comparatively quickly.
- the locally limited heating prevents the high-energy beam from further heating a sub-area to be processed that is already heated by a heat flow from an adjacent sub-area.
- the risk of local overheating is further reduced and waiting times can be further reduced.
- a variant of the method is advantageous in which in step c) the vector blocks are defined in such a way that at least predominantly for two consecutive vector blocks in the vector block sequence, the direction of progression is one last vector of the earlier vector block in the layer lies obliquely to a direction of progression of the first vector of the later vector block.
- This allows the orientation of the vectors to be flexibly adapted to the shape of the contiguous area and the shape of the downskin areas and inskin areas.
- the vectors can be guided along corners or curves of an edge line of the connected area due to their alignment.
- it is possible within the scope of the method to select a distance between adjacent downskin vectors that differs from a distance between adjacent inskin vectors. This allows the density of the downskin vectors and the inskin vectors to be adapted to the shape and extent of the downskin area and the inskin area.
- a further development of the aforementioned variant is characterized in that the starting point of the first inskin vector is adjacent to an interface between the associated inskin area of the inskin vector block and an adjacent downskin area, and that the first inskin vector starts from the starting point leads away from the adjacent downskin area, and the last inskin vector leads back to the adjacent downskin area.
- the high energy beam is positioned comparatively close to the starting point of the first inskin vector of the inskin vector block of the inskin region and can be quickly guided to this starting point.
- the high energy beam is again positioned close to the adjacent downskin area and can be quickly guided to the next downskin vector block in the adjacent downskin area in the vector block sequence of processing.
- a variant of the method according to the invention is preferred in which, at least in a majority of the inskin blocks, a respective inskin block is formed by an even number, in particular two, four or six, of inskin vectors lying next to one another, which have an alternating, opposite direction of progression, in particular where the inskin vectors run parallel to each other.
- the parallel alignment of the vectors is advantageously used for hatching to create a structurally simple hatch pattern, which is used to guide the high-energy beam when illuminating the contiguous area.
- the even number of vectors allows the start point of the first vector and the end point of the last vector to be close together, especially if the adjacent inskin vectors are approximately the same length.
- the course of the respective downskin vector follows the course of an adjacent contour, in particular outer contour, of the associated downskin area.
- the downskin area can be grown outwards on a manufactured section of the inskin area, which is advantageous for rapid heat dissipation and the avoidance of overheating.
- a large number of downskin vectors can be provided at different distances from the contour, which follow the course of the contour.
- a variant of the method according to the invention is advantageous, which is characterized in that in step c) the inskin vector blocks and the downskin Vector blocks can be defined in such a way that at a respective interface section between an inskin area and a downskin area, first all inskin vectors that are at least partially on or close to this interface section are processed, and then all downskin vectors that are at least partially are located at or close to this interface section.
- the inskin vector blocks and the downskin Vector blocks can be defined in such a way that at a respective interface section between an inskin area and a downskin area, first all inskin vectors that are at least partially on or close to this interface section are processed, and then all downskin vectors that are at least partially are located at or close to this interface section.
- This configuration of the method enables a region processed with the high-energy beam (in particular the downskin region) to cool more quickly in the contiguous region.
- a vector is considered to be close to an interface section if there is noticeable heat conduction through the interface section during the production of the vector.
- the length of the interface section can, for example, correspond to the length of neighboring downskin vectors.
- a further development of the aforementioned variant is characterized in that downskin vectors that are at least partially closer to the interface section are processed before downskin vectors that are further away from the interface section. This ensures that, during the processing of the downskin vectors, a connection based on solidified powder of the partial areas of the downskin area to be exposed, which are determined by the downskin vectors, is guaranteed to an inskin area via the interface. This results in improved heat flow from the downskin area over the inskin area during processing of the downskin area to cool the downskin area more quickly.
- waiting times are also set at least between some successive vector blocks of the vector block sequence, in which processing with the High energy beam should pause. During the waiting periods, the contiguous area cools down between treatments with the high-energy beam in order to reduce the risk of overheating. Alternatively or additionally, waiting times can also be provided within the vector blocks.
- a further variant of the method according to the invention is characterized in that at least some inskin vector blocks, which alternate with downskin vector blocks in the vector block sequence, are arranged adjacent to one another in the associated inskin area, and/or that at least some downskin Vector blocks, which follow one another in the vector block sequence alternating with inskin vector blocks, are arranged adjacent to one another in the associated downskin area.
- processing of connected areas of the contiguous area is effected in order to increase the stability of the contiguous area during the editing process.
- the formation of island-shaped exposed areas that are surrounded by areas that have not yet been exposed is avoided.
- Such island-shaped exposed areas can relatively easily change their position or orientation undesirably (for example, due to the different density and / or strength of the exposed areas in relation to areas not yet exposed).
- the control device is used to control a 3D printing machine and, among other things, carries out the planning method according to the invention, in particular according to the instructions of a previously mentioned computer program product.
- a planning device that is independent of a 3D printing machine (usually set up on a PC or server) can also be used to carry out the method according to the invention according to the program; the result of the planning process is then passed on to an independent 3D printing machine to carry out the construction process.
- the scope of the invention also includes a method for the layer-by-layer production of a three-dimensional object, in which a powdery material is locally solidified in successive layers using a high-energy beam, for at least some of the layers
- Step alpha the local solidification in the layer is planned using a method according to the invention described above, and
- Step beta the local solidification of the layer is carried out in accordance with the planning according to step alpha by using the high energy beam to process the inskin vectors and downskin vectors determined in step b) in the order determined according to step c) of the planning for this layer become.
- the scope of the invention also includes a 3D printing machine with a control device, the control device being programmed, the aforementioned manufacturing method according to the invention on the 3D printing machine to carry out.
- a 3D printing machine is set up to plan and carry out the exposure of the downskin areas and inskin areas in the contiguous area according to the invention in order to process these areas in a high-quality and accelerated manner and in particular without local overheating.
- FIG. 1 schematically shows a longitudinal section through an exemplary 3D printing machine for the layer-by-layer production of a three-dimensional object for the invention, with a high-energy beam illuminating a layer to be processed;
- Fig. 2 shows schematically a top view of a first example of a continuous area of the layer to be processed for the invention
- Figure 3 schematically shows a top view of a second example of a contiguous area of the layer to be processed for the invention
- Figure 6 schematically shows a top view of the third example of one of the contiguous region of the layer to be processed for the invention, with downskin vectors and inskin vectors running parallel and adjacent to the contour of the contiguous region.
- FIG. 1 shows schematically a longitudinal section through an exemplary 3D printing machine 1 for producing a three-dimensional object 2 in layers for the invention.
- the object 2 is grown on a substrate 3a, which is arranged on a lifting table 3 in a manufacturing chamber 4 of the 3D printing machine 1, the lifting table 3 enabling vertical movement of the substrate 3a and the object 2.
- the object 2 is manufactured from powder layers 5a, 5b, 5c in the production chamber. To produce the object, local solidification of the powder from the powder layers 5a, 5b, 5c takes place one after the other in the powder layers 5a, 5b, 5c with a high-energy beam 6 from the 3D printing machine 1.
- a (top) layer 7 to be processed made of powder 8 is irradiated with the high-energy beam 6 in order to cause local solidification of the layer 7 to be processed.
- Unsolidified powder 8 is marked here by squiggles.
- the object 2 is formed layer by layer.
- the high-energy beam 6 is generated in a beam source 16 and aligned by a mirror 17.
- the planned boundary 9 of the object 2 in the layer 7 to be processed is indicated in FIG. 1 by dashed boundary lines.
- the manufacturing process is controlled by a control device 10 of the 3D printing machine 1.
- the control device 10 is set up here to plan the local solidification for the layer 7 to be processed using a computer program product 11 or its program before this local solidification is carried out.
- the control device 10 also carries out the solidification of the respective layer to be processed.
- the reference number 14 (I) indicates an exemplary downskin area of the layer 7 to be processed, while the reference number 15 (I) indicates an inskin area of the layer 7 to be processed.
- the inskin areas 13a, 13b, 15 (I) generally require a different treatment from the downskin areas 12a, 12b, 14 (I) in the local solidification of the respective layer with the high-energy beam 6, for example with regard to the position, orientation and density of the vectors and/or the beam parameters, in particular to avoid the risk of local overheating.
- Fig. 2 shows schematically a top view of a first example of a contiguous area 18 (I) of the layer 7 to be processed (see Fig. 1), wherein in the contiguous area 18 (I) an exposure of the layer 7 to be processed with the high-energy beam to be held.
- the contiguous area 18 (I) is composed (as far as shown in FIG. 2) of an inskin area 15 (II) and a downskin area 14 (II) .
- the downskin area 14 (n) is separated from the inskin area 15 (II) by an interface 19 with interface sections, with an example of an interface section 27a in FIG.
- the downskin area 14 (II) is delimited to the outside by a contour 20 (I) .
- inskin vectors are defined for the inskin area 15 (II) , with the inskin vectors 1', 3', 4', 6' being shown in FIG. 7', 9', 10', 12', 13' are marked.
- the movement of the high-energy beam 6 during the exposure process in the inskin area 15 (II) is determined by the inskin vectors 1', 3', 4', 6', 7', 9', 10', 12', 13' .
- downskin vectors are defined for downskin area 14 (II) , of which the downskin vectors 2', 5', 8', 11', 14' are marked as examples in FIG.
- the downskin vectors 2', 5', 8', 11', 14' serve to determine the movement of the high-energy beam 6 during the exposure process in the downskin area 14 (II) .
- the downskin vectors 2', 5', 8', 11', 14' each begin and end at radially outwardly directed marking lines in Fig. 2.
- An inskin pattern 21 is therefore determined for the inskin area 15 (II) , which includes the inskin vectors 1', 3', 4', 6', 7', 9', 10', 12', 13' and in particular determines the positions, lengths and/or orientations of the vectors.
- a downskin pattern 22 is also determined for the downskin area 14 (II) , which includes the downskin vectors 2', 5', 8', 11', 14' and in particular determines the positions, lengths and/or orientations .
- the inskin pattern 21 and the downskin pattern 22 are chosen independently of each other during planning.
- the inskin vectors 1', 3', 4', 6', 7', 9', 10', 12', 13' or downskin vectors 2', 5', 8', 11', 14' become processed sequentially in their respective vector blocks 23a, 23b and 24a, 24b as part of the solidification of the connected area 18 (I) .
- the inskin vector 1' is first processed in the processing sequence.
- the downskin vector 2' is then processed in the downskin vector block 24a.
- the inskin vectors 3' and 4' are then processed in the inskin vector block 23a, with the high energy beam 6 on the inskin vector 3' being removed from the downskin region 14 (II) and then on the inskin vector 4' again is brought to the downskin area 14 (II) .
- the downskin vector 5' is processed.
- the Inskin vectors 6' and 7' are then processed in the Inskin vector block 23b.
- the downskin vector 8' now follows.
- the inskin vectors 9' and 10' are then processed. This is followed by the processing of the downskin vector 11', which is closest to the contour 20 (I) .
- the inskin vectors 12' and 13' are then processed. This is followed by the processing of the downskin vector 14' in the downskin vector block 24b.
- the downskin vectors 2', 5', 8', 11' are manufactured one after the other (alternating with inskin vector blocks, including 23a and 23b), so that material is melted onto the interface section 27a from the inside out.
- the downskin Vector 14' material is melted onto the interface section 27b, the interface section 27b having already solidified.
- the inskin vectors 1', 3', 4', 6', 7', 9', 10', 12', 13' are like this here chosen that in an inskin vector block, for example in the inskin vector block 23a, a starting point 25 of a (in the sequence of processing) first inskin vector, here for example 3 ', near an end point 26 of a last inskin vector , here 4' as an example, lies in the relevant Inskin vector block 23a.
- the starting point 25 of the first inskin vector 3 ' is here adjacent to the interface 19 between the associated inskin area 15 (II) of the inskin vector block 23a and the downskin area 14 (II) in order to ensure a rapid change of the To enable high-energy beam 6 (see FIG. 1) from the downskin area 14 (II) to the inskin vector block 23a.
- the first inskin vector 3' leads from the starting point 25 away from the neighboring downskin region 14 (II)
- the last inskin vector 4' leads back to the neighboring downskin region 14(n), whereby the high-energy beam 6 after processing the inskin vector block 23a can be quickly returned to the downskin area 14 (II) .
- the first and last inskin vectors 3', 4' are anti-parallel to an effective guidance of the high-energy beam 6, so they have an alternating, opposite direction of progression.
- the vector blocks 23a, 23b, 24a, 24b are preferably set in such a way that for each two vector blocks 24a, 23b following one another in the vector block sequence, a respective end point , here by way of example an end point 28 of the last vector 2' of the earlier vector block 24a is spatially spaced from a starting point of the later vector block, here by way of example the starting point 25 of the first vector 3' of the later vector block 23b.
- Fig. 3 shows schematically a top view of a second example of the contiguous region 18 (II) of the layer 7 to be processed (see Fig. 1).
- the contiguous area 18 (II) shown in FIG. 3 is from an inskin area 15 (III) and a first downskin area 14 (III) and a second downskin area 14 (IV) , which adjoin the inskin area 15 (III) , with the inskin area 15 (III) here between the both downskin areas 14 (III) , 14 (IV) .
- inskin vectors are again defined in the inskin area 15 (III) , some of which are designated, for example, 1", 2", 4", 5", 8", and Downskin vectors are defined in the downskin areas, some of which are designated as 3", 6", 7", 12" and 9", 10", 11".
- some of the downskin vectors (for example the downskin vectors 3", 6") run anti-parallel to one another in order to enable effective guidance of the high-energy beam 6 (see FIG. 1).
- the downskin vectors 3'', 6'', 7", 12'' and 9", 10'', 11'' are oblique or perpendicular to the inskin vectors 1'', 2", 4'', 5", 8'' aligned, whereby the downskin vectors 3'', 6'', 7'', 12'' and 9'', 10'', 11" are particularly independent of the inskin vectors 1", 2 ", 4", 5", 8" are selected.
- the Inskin vectors are combined into Inskin vector blocks, with Inskin vector blocks 23c and 23d for the Inskin vectors 1", 2", and 4", 5" being shown here as examples. Accordingly, the downskin vectors are combined into downskin vector blocks, of which a downskin vector block 24c for the downskin vector 3" is shown here as an example.
- the inskin vector blocks and the downskin vector blocks are processed alternately in a vector block sequence (not illustrated in more detail, in particular the numbering of the vectors here only partially corresponds to the processing order).
- the downskin areas 14 (III) , 14 (IV) and the inskin area 15 (III) are together surrounded by a contour 20 (II) .
- Fig. 4 shows schematically a top view of the second embodiment of the contiguous region 18 (II) , with only the inskin vectors 1", 8" and downskin vectors 6", 7", 9 closest to the contour 20 (II). ", 10", 11"12", are shown. These Inskin vectors 1", 8" and Downskin vectors 6", 7", 9", 10", 11", 12" can be used to melt the contour 20 (II) of the contiguous area 18 (II) in a contour movement defined by these vectors, if necessary again after these vectors have already been used during the exposure of the contiguous area Area 18 (II) were processed.
- FIG. 5 shows schematically a top view of a third example of a contiguous region 18 (III) of the layer 7 to be processed.
- the rectangular contiguous region 18 (III) shown in FIG. 5 is made of an inskin region 15 (IV). and a first downskin area 14 (V) and a second downskin area 14 (VI) , the downskin areas 14 (V) , 14 (VI) being formed here at opposite corners of the related area 18 (III) .
- the downskin vectors are parallel in the respective downskin areas 14 (V) , 14 (VI). to each other and obliquely to a contour 20 (III) of the contiguous area 18 (III) , with two downskin vectors, for example the downskin vectors 3"', 4"' or 7"', 8"' becoming one Downskin vector block are summarized, here as an example the downskin vector blocks 24d and 24e.
- the downskin vectors 3"', 4'", 7'" and 8"' point to the contour 20 (III) of the contiguous area 18 (III) , so that the high-energy beam 6 (see FIG.
- Inskin area 15 (IV) and the downskin area 14 (V) are exemplary first Inskin vectors 1"' and 2"' processed in the inskin vector block 23e.
- the downskin vectors 3"', 4'” are then processed in the downskin vector block 24d. This is followed by processing the inskin vectors 5"', 6'" in the inskin vector block 23f.
- the downskin vectors 7"', 8'" are then processed in the downskin vector block 24e.
- FIG. 6 shows schematically a top view of the third example of the contiguous region 18 (III) , with downskin vectors 9"' in the inskin region 15 (IV) or the downskin regions 14 (V) , 14 (VI). , 10"' as well as 13"', 14"' and inskin vectors 11"', 12"' as well as 15"', 16"' run parallel and adjacent to the contour 20 (III) of the contiguous area 18 (III) . These vectors are in addition to the vectors shown in Figure 5 in the contiguous region 18 (III) .
- the high-energy beam 6 can pass along the downskin vectors 9"', 10"' and 13"', 14"' and inskin vectors 11"', 12"' and 15"', 16"' shown in FIG. 6 be guided in order to carry out a contour journey and to melt the contour 20 (III) of the contiguous area 18 (III) .
- This contour movement typically takes place finally, after processing the vectors shown schematically in FIG. 5.
- the vectors 9"' to 16'" are processed here in ascending order of their number.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022115803.9A DE102022115803A1 (de) | 2022-06-24 | 2022-06-24 | Verfahren zur Planung der lokalen Verfestigung einer Schicht pulverförmigen Materials bei der schichtweisen Fertigung eines dreidimensionalen Objekts |
| PCT/EP2023/064576 WO2023247147A1 (de) | 2022-06-24 | 2023-05-31 | Verfahren zur planung der lokalen verfestigung einer schicht pulverförmigen materials bei der schichtweisen fertigung eines dreidimensionalen objekts |
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| Publication Number | Publication Date |
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| EP4543612A1 true EP4543612A1 (de) | 2025-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23730079.3A Pending EP4543612A1 (de) | 2022-06-24 | 2023-05-31 | Verfahren zur planung der lokalen verfestigung einer schicht pulverförmigen materials bei der schichtweisen fertigung eines dreidimensionalen objekts |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250115004A1 (de) |
| EP (1) | EP4543612A1 (de) |
| CN (1) | CN119421753A (de) |
| DE (1) | DE102022115803A1 (de) |
| WO (1) | WO2023247147A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9676032B2 (en) | 2013-09-20 | 2017-06-13 | Arcam Ab | Method for additive manufacturing |
| DE102015204630A1 (de) * | 2015-03-13 | 2016-09-15 | Eos Gmbh Electro Optical Systems | Verfahren und Vorrichtung zum Herstellen eines dreidimensionalen Objektes mit verbesserter Oberflächengüte |
| CN110462535B (zh) | 2017-03-31 | 2023-05-05 | Eos有限公司电镀光纤系统 | 三维物体制造方法和设备及其控制单元、提供控制数据的方法和存储介质 |
| DE102017126624A1 (de) | 2017-11-13 | 2019-05-16 | Trumpf Laser- Und Systemtechnik Gmbh | Schichtselektive belichtung im überhangbereich bei der generativen fertigung |
| EP3542927A1 (de) * | 2018-03-20 | 2019-09-25 | Siemens Aktiengesellschaft | Verfahren zum selektiven bestrahlen einer materialschicht, verfahren zum bereitstellen eines datensatzes, vorrichtung und computerprogrammprodukt |
| DE102021129705A1 (de) * | 2021-11-15 | 2023-05-17 | Trumpf Laser- Und Systemtechnik Gmbh | Verfahren, Planungsvorrichtung und Computerprogrammprodukt zum Planen einer lokal selektiven Bestrahlung eines Arbeitsbereichs mit einem Energiestrahl, sowie Verfahren, Fertigungsvorrichtung und Computerprogrammprodukt zum additiven Fertigen von Bauteilen aus einem Pulvermaterial |
| CN114565745B (zh) * | 2022-03-02 | 2025-02-28 | 南京理工大学 | 一种考虑悬垂特征识别的激光增材制造扫描路径分区域规划方法 |
-
2022
- 2022-06-24 DE DE102022115803.9A patent/DE102022115803A1/de active Pending
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2023
- 2023-05-31 WO PCT/EP2023/064576 patent/WO2023247147A1/de not_active Ceased
- 2023-05-31 EP EP23730079.3A patent/EP4543612A1/de active Pending
- 2023-05-31 CN CN202380049014.XA patent/CN119421753A/zh active Pending
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2024
- 2024-12-19 US US18/986,784 patent/US20250115004A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023247147A1 (de) | 2023-12-28 |
| CN119421753A (zh) | 2025-02-11 |
| US20250115004A1 (en) | 2025-04-10 |
| DE102022115803A1 (de) | 2024-01-04 |
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