DE102006056165A1 - Layer data generating method for computer system, involves outputting individual vertical layer data of three-dimensional body e.g. camera housing, provided with structured body content for controlling prototyping system - Google Patents

Abstract

The method involves providing body data of a three-dimensional body (100) e.g. camera housing, to be produced, and defining a layer thickness of vertical sections, which are required for production of the body by a rapid prototyping system (6). The body is segmented into a number of three-dimensional unit cells, and a cell structure is defined for the unit cells, and layer data are copied into the unit cells. Individual vertical layer data of the three-dimensional body provided with a structured body content are outputted for controlling the prototyping system. Independent claims are also included for the following: (1) a structure generator for providing a vertical layer data of a three-dimensional body (2) a computer readable medium comprising instructions to perform a method for generating layer data in a computer system.

Description

TECHNICAL AREA

The The present invention relates to a method for generating Layer data in a computer system for producing three-dimensional body with textured body inside using a layering process (commonly referred to as Rapid Prototyping systems, layered technology or RP systems). Furthermore, the present invention relates to a computer system for Generating layer data of a three-dimensional body with textured body interior, with which using a laminating system, a three-dimensional body can be produced. Furthermore The present invention relates to a computer readable medium having computer-executable instructions that cause that the computer system the inventive method for generating of layer data for the production of three-dimensional body with textured body heart executes by means of a laminating system. Finally, the present concerns Invention a rapid prototyping system, with a computer system according to the invention for generating layer data of a three-dimensional body with structured body interior connected is.

BACKGROUND OF THE INVENTION

to fast and inexpensive Production of prototypes or small series have long been the mentioned in the beginning Laminated systems known. The main application of the hitherto industrially used Rapid prototyping systems lies in the production of components from organic materials such as polymers and waxes. More and but also find rapid prototyping systems in the production of metallic components use. In particular, metallic Components over the melting phase by the so-called laser sintering or electron beam melting generated.

common Feature of all known rapid prototyping systems is the layers Structure of the workpiece. Normally this will be 3D CAD data first disassembled into a plurality of individual layers or elevation cuts to make it build the workpiece in the actual manufacturing process. So it has to be for all known layer construction method for the production of three-dimensional bodies for every Layer the body contour data to be available. Body outline data here are the data that specify exactly in each layer which areas of the layer, depending on the type of laminating technology used to be exposed, printed or sintered.

The previously available Systems for generating the corresponding data of a shift work in principle as follows. Either in a known system, the entire Structure, not only the outline, but also the inside of the body a 3D-CAD system three-dimensional constructed. Accordingly, then the elevation cuts are carried out. Alternatively, in some RP systems during manufacturing, so in the course of the execution the exposure or the like, per shift, the calculation of a Filling structure performed but only a flat one Structure at the respective layer level, but not free spatial Structural design allows.

The Creating a complicated three-dimensional body with textured body heart With the help of a 3D-CAD-System, on the one hand, it is extremely time-consuming and, on the other hand, it is fast the capacity limit Currently available CAD systems reached. The creation of structures within the rapid prototyping Systems is extremely limited and limited to a few exposure or filling structures, the are defined by the system manufacturer. Thus, one is the wishes of the user corresponding production of complicated structures in particular of space grid structures in the interior of the body a produced three-dimensional body currently only extremely limited possible. Corresponding Nowadays, only a few rough and simple structures or only extremely small ones are used Components with somewhat more complex structures in rapid prototyping systems created.

PRESENTATION OF THE INVENTION

The The technical problem underlying the invention is that to provide a method and a device with the Help complex structures in the body a three-dimensional body can be realized by known layer construction method, without the usual ones Use CAD systems with their limitations to have to. In other words, a way should be created which also involves the production of user-specific, very complex spatial Structures in known layer construction method allows without consuming a corresponding 3D-CAD model has to be created and cut.

This technical problem is solved according to one aspect of the present invention by a method for generating layer data in a computer system for producing three-dimensional bodies with a structured body interior by means of a laminating system, in which initially the usual CAD data of the three-dimensional body to be produced are provided. It also determines the layer thickness of the vertical sections used to make the three-dimensional Body is desired by means of the rapid prototyping system. Thus, the number of individual cuts is determined by the body to be produced.

for the first time Now according to the invention based of 3D data or contour data defined three-dimensional body in subdivided a plurality of three-dimensional unit cells. The Unit cells can doing some spatial Have shape. Preferred is a cube or cuboid shape for the unit cells. For the sake of good order, it should be noted that in principle, too possible is to give the unit cells any spatial shape, especially as octahedron etc. or as a ball. The totality of the unit cells then forms the three - dimensional body, the is to produce in layered technology. Further, according to the invention, a cell structure for one Unit cell set. The cell structure comprises at least an oblong Rod element whose length defined by two individual points in space within a unit cell is. Each rod element also has a specific cross-sectional profile assigned. This unit cell so determined in its spatial structure with one or more rod elements with a certain cross-sectional profile is then one or more times according to the for the generation of layer data of the three-dimensional body required number of cuts cut. This is now the layer data individually according to vertical sections of this a unit cell. The amount of data is rather small, since normally the unit cell is opposite to the three-dimensional one to be formed body is much smaller.

In Another step will now be the step in the previous step layer data obtained in the other unit cells of the same Group if several groups of unit cells have been set, copied. In other words, all the unit cells that come through the for the production of the three-dimensional body by means of the layer construction process necessary vertical sections how to cut the exemplarily cut unit cell, become the same layer data of this cut unit cell assigned. As a result, the cutting data for all cuts for manufacturing are now of the three-dimensional body available. If a unit cell is cut differently by the cuts as the exemplary cut unit cell, it must have its own Cutting data generation performed become. Then can these cutting data are copied into the unit cells corresponding to get cut.

It can Now the individual layer data of the now structured with an arbitrary body content provided three-dimensional body for the Control of a rapid prototyping system output. These So data contains the information necessary for making a 3D body in Laminate technologies are needed. In this case, the educated spatial Structures usually over several Layers. For the first time it is easy and with little effort connected way possible, larger body with to build a complicated space structure in layered technology.

Of the present invention is based on the idea that for the production of a complex structured three-dimensional body necessary Generate layered data by using only one exemplary unit cell, which is much smaller than the three-dimensional body to be produced, cut is and cut these cut data then further accordingly Unit cells are assigned. The three-dimensional body becomes For this purpose according to the invention in a Large number of unit cells, basically all are the same. It is however in an exemplary embodiment of the present invention also possible groups of unit cells to form, which then created and cut according to the invention become. In other words, the unit cell of a first group of unit cells is cut according to the invention one or more times and the corresponding layer data of this unit cell then into the other unit cells of this group of unit cells copied or assigned. For each additional group of unit cells will then turn each one an exemplary unit cell cut and according to their Cutting data into the unit cells of the others belonging to the same group Unit cells assigned or copied.

On This way it is without big Effort and computing power possible, the total layer data of the individual sections used for the production of the body in layering technology are required to generate. The user has a great freedom of design in the spatial structure that he gives to the entire body or to individual parts of the body.

A another exemplary embodiment of the present invention provides that the height of a unit cell set so is that it is an integer multiple of the distance of two adjacent layers or sections is. Because of this measure will achieved that those unit cells of the same kind are, therefore, to be assigned to the same group, all in relation to one Coordinate system for each of these unit cells is identical, at the same levels get cut. Accordingly, the cutting data of the example cut unit cell into all other cells are copied.

For the sake of good order, it should be noted that the cutting process in the exemplary A can be carried out differently, without departing from the basic idea of the present invention. Thus, an actual intersection of one or more cutting planes with the three-dimensionally defined cell structure can take place, as a result of which the height-cut data necessary for each cutting plane in this unit cell is then obtained. Alternatively, it is equally possible to determine for each defined cell structure element what its section actually looks like with the elevation plane. For this purpose, it is possible to calculate how the cross-sectional profile predetermined by the user for the respective cell structure element is imaged in the respective height-section plane. Further explanations can be found in the following description of the figures. The latter alternative approach has the advantage that the computer power for determining the cutting data is much lower than in the first alternative. Accordingly, the cutting data of the exemplary "cut" unit cell can be generated more quickly than in the alternative, in which spatial intersection curves are actually determined by the penetration curves of two spatial elements.

In another exemplary embodiment of the present invention Invention, the cross-sectional profile of the user from a variety of predefined cross-sectional profiles stored in a database selected. Thus, working with such a database is simplified and the most common Cross-sectional profiles for the respective bar elements of a unit cell can be fast and allocated quickly become. Alternatively, it is another exemplary embodiment the present invention also possible that the cross-sectional profile for each Rod element in the unit cell is defined by the user. To can be for example usual Use CAD routines. So it's easy in both the first as well as in the second alternative possible, any cross-sectional profiles Assign different bar elements of a unit cell. such Cross-sectional profiles can be closed profiles, hollow profiles or open profiles. The fundamental Shape can be eckig, round, oval or different shape. The user is There are no limits. Because the user only in a single exemplary unit cell of a group of unit cells the number, shape and length of the Rod members and only this unit cell is cut, to get the total cut data of the whole body is the associated computational effort with conventional computing units deal with.

In Another exemplary embodiment is the cross-sectional profiles no over a framework that includes points and connecting lines, but without framework over predefined cross-sectional profiles set, then all Unit cells assigned to the same group of unit cells become. Such cross-sectional profiles can then also circles, circular sections, Radii, elliptical pieces, parabola pieces or contain any freely drawn polylines.

In another exemplary embodiment of the present invention Invention are the cross-sectional profiles on pre-defined rules set so that explicitly contact points between different Defined structures make up these different structures force-transmitting to connect with each other.

A particularly simple and fast implementation of the method according to the invention is given in an advantageous further embodiment then, if all unit cells into which the body is divided are identical are. By this is meant that both the shape and the dimensions the unit cells for are constructed identically throughout the three-dimensional body to be produced. Thus, only the cell structure of a single unit cell of Users can be set and the next steps can be fast and without much computational effort carried out become. In this exemplary embodiment, therefore, a single Unit cell from the user with several, in any spatial Location arranged rod elements formed, for example have a cross-sectional profile in the form of a circular disk. Then it will be this exemplarily created unit cell in the required intervals, those of the necessary vertical sections are cut for producing the three-dimensional body. This shift data for The individual layers of a unit cell are then placed in the copied to other unit cells.

In another exemplary embodiment of the present invention, the three-dimensional body to be produced is subdivided into a plurality of groups of unit cells. In this way, different regions of the three-dimensional body to be produced with different cell structures can be formed. The inventive method of the type mentioned above is modified accordingly as follows. In step c), the three-dimensional body is divided into a plurality of three-dimensional unit cells of a first group of unit cells and into at least one further plurality of three-dimensional unit cells of a further group of unit cells. Subsequently, in the modified step d), a cell structure is determined for the unit cells of the first group of unit cells, wherein the cell structure is formed from at least one elongated rod element whose length is defined by two spaced-apart spatial points within a unit cell is defined and that has a certain cross-sectional profile. In addition, a cell structure for the unit cells of the at least one further group of unit cells is determined, wherein the cell structure of the unit cells of the at least one further group is optionally formed from at least one elongate rod element with a certain cross-sectional profile, the length of which by two spaced apart space points within the unit cell of at least another group of unit cells is defined. Step e) is also modified as follows. The unit cells which have been provided with the respectively defined cell structure in step d) are cut one or more times according to the number of height cuts required for the generation of layer data of the three-dimensional body. Then, in the modified step f), the layer data obtained in step e) are copied to the other unit cells of the associated group of unit cells intersected by the height slices according to the unit cell of the same group of unit cells cut in step e).

Deliver out is that a rod element according to the present invention also any spatial Element, such as a sphere. In this case is the cross-sectional profile over the "length" of the "rod element" is not constant. such Room elements can for example about defined multiple cross-sectional profiles stored in a database be.

In another exemplary embodiment of the present invention Invention is for the case that the cell structure contains a rod element whose Start and end point in the plane of a vertical section of the product to be produced three-dimensional body lie, this rod element automatically by a predetermined angle across from the plane of the vertical section tilted. This ensures that also a defined cut arises, which is then actually realized in the layer construction process. at an object lying in a plane parallel to the elevation layers runs, would be this Object not possible in RP technology.

In another exemplary embodiment of the present invention Invention are the cutting data of a cross-sectional profile of a Rod element depending on be determined by the orientation of the rod element relative to the cutting plane. This basically means that the projection of a cross-sectional profile taking into account the orientation of the associated Bar elements opposite the cutting plane is determined, so that in this way with simple and very quickly, known computing operations, the cutting data of each cell structure element this unit cell in the desired Cutting plane can be determined. The user-specified cross-sectional profile is therefore under consideration the spatial Angle, which is the associated Bar elements opposite takes the section plane, projected, twisted and stretched.

In another exemplary embodiment of the present invention Invention cross-sectional profiles of rod elements in unit cells Group of unit cells with cross-sectional profiles of bar elements in unit cells (another, adjacent group of unit cells) connected connection points of these unit cells. This makes it possible different structures having unit cells that are adjacent, Defined to connect with each other, making one stuck together Connected cell structure arises in the layer construction process, despite that different unit cells were defined. Alternatively it is it also possible intentionally not to create a connection, which achieved that can be two or more mutually agile, but interlocking structural bodies be created in layered construction.

In another exemplary embodiment of the present invention Invention corresponds to the specified cell structure a negative Body volume. This means that as an alternative to the above explanations a method according to the invention Users can also define the cell structure in such a way that the layered construction creates a cavity and all undefined Spaces of a unit cell as a solid body be formed. Normally, however, the cell structures generated for that that these then form the actual body.

In another exemplary embodiment of the present invention Invention are the cross-sectional profiles of the unit cells with the body- or contour data of the body blended.

In order to is achieved, that the body is generated according to the contour data, but the desired structure inside has.

In another exemplary embodiment of the present invention Invention can the body data of several bodies come.

In another exemplary embodiment of the present invention, the body data is divided into differently arranged and / or aligned unit cells. In contrast to adjacent unit cells, which are arranged in juxtaposition to a superordinate coordinate system, it is alternatively also possible to rotate unit cells towards one another or at different distances to arrange each other. Thus, rotations and / or overlaps etc. of unit cells can be used for the production of very specific spatial structures. So you could copy it with thread etc.

In another exemplary embodiment of the present invention Invention, individual groups of unit cells are arranged that certain patterns or shells are formed. such Arrangements can be in turn for the realization very special Use room structures.

In another exemplary embodiment of the present invention Invention become the created cell or space structures on pass external computation program. This makes it possible, for example Strength calculations for To perform the created spatial structures In another exemplary embodiment In the present invention, the cell structures become completely solid Combined areas. This in turn allows special cell structures create.

• a) Bereitstellen der Körperdaten des herzustellenden dreidimensionalen Körpers,
• b) Festlegen einer Schichtstärke der Höhenschnitte, die zur Herstellung des dreidimensionalen Körpers mittels des Rapid Prototyping Systems gewünscht sind,
• c) Aufteilen des dreidimensionalen Körpers in eine Vielzahl von dreidimensionalen Einheitszellen,
• d) Festlegen einer Zellstruktur für die Einheitszellen, wobei die Zellstruktur aus einer Anzahl von verschiedenen Querschnittsprofilen festgelegt wird, die innerhalb einer Einheitszelle liegen,
• e) Schneiden derjenigen Einheitszelle, die im Schritt d) mit der festgelegten Zellstruktur versehen wurde, ein oder mehrmals entsprechend der für die Generierung von Schichtdaten des dreidimensionalen Körpers erforderlichen Anzahl von Höhenschnitten,
• f) Kopieren der im Verfahrensschritt e) erhaltenen Schichtdaten in die anderen Einheitszellen, die entsprechend der im Schritt e) geschnittenen Einheitszelle von den Höhenschnitten durchschnitten werden.
• g) Ausgeben der einzelnen Höhenschichtdaten des nunmehr mit einem strukturierten Körperinhalt versehenen dreidimensionalen Körpers für die Ansteuerung eines Schichtbausystems.

According to another aspect of the present invention, there is provided a method of generating layer data in a computer system for fabricating three-dimensional bodies having a textured interior by means of a laminar structure that uses only cross-sectional profiles instead of the aforementioned bar elements for the formation of cell structures. The process according to the invention contains the following process steps:

• a) providing the body data of the three-dimensional body to be produced,
• b) determining a layer thickness of the vertical sections which are desired for the production of the three-dimensional body by means of the rapid prototyping system,
• c) dividing the three-dimensional body into a plurality of three-dimensional unit cells,
• d) determining a cell structure for the unit cells, wherein the cell structure is determined from a number of different cross-sectional profiles that are within a unit cell,
• e) cutting the unit cell provided with the defined cell structure in step d), one or more times according to the number of height sections required for the generation of layer data of the three-dimensional body,
• f) copying the layer data obtained in step e) into the other unit cells which are intersected by the height sections in accordance with the unit cell cut in step e).
• g) outputting the individual height layer data of the three-dimensional body now provided with a structured body content for the control of a laminating system.

According to one more Another aspect of the present invention is a structure generator for creating elevation layer data a three-dimensional body with textured body inside using a laminating system in a computer system. Of the Structure generator according to the invention includes an input and display device, a computing device and an output device.

The Input device allows the user to specify the number of vertical cuts or the layer thickness, that for the production of the three-dimensional body by means of the layer construction system is desired set. This also allows the user to customize the three-dimensional body in a desired Divide the number of three-dimensional unit cells. The user defines hereby defines a cell structure for the unit cells, wherein the cell structure consists of at least one elongated rod element is whose length by two spaced-apart space points within a unit cell is defined and that has a certain cross-sectional profile.

The Display allows the display of the virtual created Unit cells and the associated Space structures.

The Calculator generates according to the previously explained inventive method the generation of cutting data

The Output device finally allows the individual altitude layer data of the now provided with a structured body content three-dimensional body for the To issue control of a laminating system.

All Generally, according to a Another aspect of the present invention is a method of generating of layer data in a computer system for producing three-dimensional Body with textured body heart provided by a laminating system in which the three-dimensional body divided into a plurality of three-dimensional unit cells becomes a spatial unit in an exemplary unit cell Cell structure is defined, and layer data of the exemplary unit cell copied into the other unit cells.

Finally, in yet another aspect of the present invention, there is provided a computer-readable medium having computer-executable instructions thereon cause the computer system to carry out one of the inventive methods for generating layer data for producing three-dimensional bodies with a structured body interior by means of a layer construction system.

BRIEF DESCRIPTION OF THE DRAWINGS

in the The following are for further explanation and better understanding several embodiments of the present invention with reference to the accompanying drawings described in more detail. It shows:

1 a schematic representation of a computer system, which is connected to a layer construction system and allows the production of three-dimensional body with complicated spatial structure according to the present invention,

2 3 is a schematic front view of a three-dimensional body to be produced in a coordinate system, the individual height sections or layers required for the manufacture in layer construction being indicated here,

3 a schematic cross-sectional view similar to the 2 of the three-dimensional body to be produced,

4 a schematic view of a section of the in the 2 and 3 shown three-dimensional body, which is to be manufactured in layering technology,

5 3 is a schematic, three-dimensional representation of a body to be produced in layered technology in the form of a cube,

6 the Indian 5 shown cube-to-be-manufactured cubes now divided into a plurality of unit cells,

7 a schematic view of a unit cell of the in 6 shown, subdivided into a plurality of unit cells body

8th a schematic view of the in the 7 shown unit cell with a submenu for determining the cross-sectional profile of a rod element of this unit cell,

9 one of the 8th similar representation, here in the 8th set points of the cross-sectional profile of a rod element are now connected,

10 a modification of the in the 8th indicated cross-sectional profile, in which case instead of the square profile according to the 9 now a cross profile is defined for a rod element,

11 one of the 10 similar view, here now in a submenu adjustment of the profile in dependence of the bar direction can be made in order to minimize the actual shape of the real structure Fehlerminimierend adapted to the selected layer construction method and the selected layer thickness.

12 a sectional view of a vertical section of the in the 7 shown unit cell with in the 10 respectively. 11 shown cross-sectional profile of a rod element,

13 another exemplary cell structure of a unit cell as in 7 , where there are no connection points to cells of the same group.

14 Yet another exemplary embodiment of a cell structure of a unit cell, which corresponds to the in 7 shown embodiment is basically comparable, but has a connection point to the same neighboring cells,

15 Yet another exemplary embodiment of a cell structure of a unit cell, which corresponds to the in 7 shown embodiment is basically comparable, but has three connection points to the same neighboring cells,

16 yet another exemplary embodiment of a cell structure of a unit cell,

17 a further exemplary embodiment of a cross-sectional profile for a rod element of a unit cell,

18 a further exemplary embodiment of a cell structure of a unit cell with a rod element composed of three parts with different profiles,

19 a three-dimensional body to be produced with two groups of unit cells,

20 a further exemplary embodiment of a body to be produced with three different groups of unit cells,

21 a further exemplary embodiment of a three-dimensional body to be produced with a larger number of different groups of unit cells, of which certain groups can serve to connect other groups,

22 an exemplary vertical section of the in 21 shown three times to be produced sional body,

23 a schematic flow diagram of the method according to the invention for generating layer data in a computer system for the production of three-dimensional body with structured body interior,

24a f schematic representations of possible automatic connections of adjacent cell structures of different groups of unit cells, and

25a -d schematic representations of differently oriented rod elements and possible assignments of cross-sectional profiles.

DETAILED DESCRIPTION THE EXEMPLARY EMBODIMENTS OF THE PRESENT INVENTION

The 1 shows a schematic representation of a computer system 1 that over a line 5 with a known rapid prototyping system 6 connected is. The computer system 1 here includes a computing unit 2 , a monitor 3 with display and a keyboard 4 for entering instructions. In the arithmetic unit 2 are the well-known components such as data storage, CPU, etc. available to run the inventive method.

When in the 1 The view shown is the Rapid Prototyping facility 6 with a table 7 equipped, which is moved in height to the body to be produced 100 build up in layers. In the present case is a camera body 100 produced in the rapid prototyping process.

The 2 shows a schematic view of the camera body 100 in a Cartesian coordinate system x, y, z. Here is very schematically the body to be produced 100 divided into individual height sections or layers S1-S10. In reality, of course, not 10 layers but with such a body probably several thousand layers to make, in order to achieve the desired resolution. For every single layer S1-S10 will be in rapid prototyping facility 6 requires the particular cutting data, that is, the data indicating which parts of a polymer liquid bath or a metallic powder (or other media, depending on the type of RP method used, is exposed, solidified or printed.

The 3 shows a cross-sectional view along the line III-III in 2 , From this it can be seen in particular that the body 100 as a hollow body with a hollow housing interior 105 , Exterior walls 102 and a caseback 101 and a curved housing cover 104 is trained. On the front there is an opening 103 , In the housing cover 104 is again a closed cavity 106 available. Such bodies 100 with undercuts and cavities 105 . 106 etc. can basically be produced in known RP processes. As again in the 3 Indicated by the sections S1-S10, the places to be exposed must correspondingly be present in the form of cutting data.

The 4 shows such a vertical section S2 and the corresponding sections through the housing 100 , In the vertical section S2 here are housing sides 110 . 111 . 112 . 113 represented, which are then exposed by the laser or the like. It is thus in a height layer S2 of this housing part 110 - 113 solidified with a height of, for example, 0.1 mm in the form of hardened polymer or sintered metal. In this embodiment, each layer S1 to S10 is then produced and thus the total body is formed.

As already mentioned, those are for the production of the housing 100 necessary contour data normally from a 3D CAD system. However, the formation of extremely special spatial structures is not readily possible and only to a very limited extent.

Based on 5 to 22 The method according to the invention for generating special cutting data for generating even complicated three-dimensional bodies with a specific spatial structure will now be explained.

The 5 shows a three-dimensional cube 200 which is to produce in layering technology. In the usual way, here would be the outline data of the cube 200 be generated by a 3D CAD system. Under certain circumstances it would also be possible for the wall thicknesses of this cube to be fixed. However, with the CAD programs available today and with the use of common computer capabilities, it is not possible to have such larger bodies 200 to provide, for example, a variety of tiny, perhaps only a few millimeters large, individual structural elements, so that, for example, the cube walls in their thickness are not made of solid material, but only certain desired spatial forms. This is where the inventive method now begins.

Like in the 6 shown is the cube 200 into a variety of unit cells 210 divided. In the present case, the cube 200 for better illustration in only 600 single unit cells 210 been split. Preferably here is the unit cells 200 each with its own Cartesian Coordinate system x, y, z, assigned to the coordinate system x, y, z, that the cube 200 is assigned, are aligned identically. But it is also possible to use the unit cells 210 to assign its own coordinate system x, y, z, which is derived from the parent coordinate system of the cube 200 differs, for example, is rotated by one or more axes. It must then later in the conversion of the individual data of a unit cell 210 to the superordinate coordinate system y, x, z of the cube 200 appropriate transformations are performed, but mathematically well known and can be readily integrated into mathematical routines in the present process. When in the 6 shown exemplary embodiment, the single cells 210 each the shape of a cube and connect to each other. But it is also readily possible, the unit cells 210 for example, the unit cells could also be in the form of an elongated cuboid, a rhombus or a polygon. It would also be possible for the unit cells 210 as spheres, ellipsoid, etc. form. In addition, it is also possible to use the unit cells 210 not to abut each other, but between the unit cells 210 to provide a clearance or an overlap.

According to the present inventive method, it is now possible to use a unit cell 210 to assign a desired structure. This is in the 7 exemplified. Here are from the unit cell 210 the eight vertices 214 . 216 . 218 . 220 . 222 . 224 . 226 . 228 as spherical structures on the monitor 3 of the computer system 1 shown. These cornerstones 214 . 216 . 218 . 220 . 222 . 224 . 226 . 228 are only for the visualization of the unit cell 210 determined and later form no part of the body to be produced 200 , In principle, however, it would also be possible to produce such spheres or other shapes if they were assigned a volume. In the 7 is a rod element 212 shown by the two vertices 114 . 216 the unit cell 210 is limited. The rod element 212 is thus a spatial diagonal in the unit cell in the present embodiment 210 , In the present case, this unit cell becomes 210 according to the 7 no further rod element 212 assigned. However, it would also be possible, as will be explained later, more rod elements 212 with identical or different structure in this unit cell 210 of the 7 to integrate. At the six corner points 218 . 220 . 222 . 224 . 226 . 228 push the corner points 214 and 216 the adjacent same unit cells to the unit cell shown.

Like in the 8th schematically shown in a separate viewing window, it is possible according to the present invention, the rod element 212 a cross-sectional profile 240 assigned. So it is possible for a user in a simple way, several points 230 . 232 . 234 . 236 in a predetermined coordinate system x, y set, then the actual profile 240 determine. The cross-sectional profile 240 a rod element 212 Here is the set profile, which is present when you take a section perpendicular to the longitudinal direction of the rod element 212 leads.

After setting the corner points 230 . 232 . 234 . 236 for the cross-sectional profile 240 of the rod element 212 will be in the 9 shown how these vertices 232 . 234 . 236 . 238 For example, be connected to each other to the desired cross-sectional profile 240 for the rod element 212 to accomplish. Like in the 9 shown here are the cornerstones 232 . 234 . 236 . 238 with lines 231 . 233 . 235 . 237 connected, so that in cross section a square profile 240 arises. The rod element 212 as it is part of the unit cell 210 according to the 7 is, so would be a square bar, the in the 9 has shown cross-sectional shape. In the present case could then optionally be determined whether the interior of the cross-sectional profile 240 as it is in the 9 is shown to be filled, or whether it should be designed as a hollow profile. In the case of a hollow profile 240 then have the walls of the rod element 212 a predetermined thickness of, for example, 0.1 mm to 1 mm.

The 10 shows an alternative exemplary embodiment of another cross-sectional profile 250 that have the same vertices 232 . 234 . 236 . 238 like that in the 9 shown cross-sectional profile 240 Has. In the cross-sectional profile 250 according to the 10 but are the opposing vertices 232 . 236 and 234 . 238 through lines 252 . 254 connected. This would have a rod element in this case 212 as it is in the 7 shown is a "cross-profile." The walls 252 . 254 the correspondingly formed rod element 212 again would have the above predetermined thickness.

The 11 now shows schematically different variants for generating a structure in a unit cell 210 , Here is the cross-sectional profile 250 according to the 10 shown, it is now possible, this cross-sectional profile 250 further bar elements 212 in the unit cell 210 according to the 7 not yet shown, assign. It can now be chosen whether this bar profile 250 the other rod elements 212 the same unit cell 210 should be assigned in the same orientation, or whether it should be rotated and / or projected. According to the submenu 258 So it is possible for a user, the bar profile 250 other bar elements 212 to assign that in the unit cell regardless of the orientation of the staff mente 212 the respective profile 250 always the same orientation. But it is also possible to provide a rotation so that each rod element 212 with the profile 250 is formed, the profile 250 then always "rotates" according to the bar direction in cutting plane S. This means that the orientation of the profile is carried out according to the different bar directions 250 to project. This allows a user to create a bar profile 250 so on other rod elements 212 provide that profile 250 is stretched in the bar direction. With a flat inclination of the rod element 212 with respect to the cutting plane S, or at a greater distance between the cutting planes S (N) and S (N + 1), the cross-sectional profiles of the successive vertical cuts would otherwise normally not touch. It is alternatively also possible to combine a combination of rotation and projection of a bar profile 250 for other rod elements 212 perform.

In the 12 is now shown in a further window, a sectional plane S, which is the unit cell 210 and the rod element located therein 212 with the in the 11 shown cross-sectional profile 250 cuts. The cut is so that a cross 262 is formed, which has a longitudinal and transverse web 264 . 266 includes. Because the rod element 212 the profile 250 with rotational adjustment and projection to the rod direction and as spatial diagonal in the unit cell 210 integrated, the cut becomes 262 in this embodiment versus the cross-sectional definition 250 rotated and consumed according to the set layer thickness. Accordingly, the lengths of the webs differ 264 and 266 from the lengths of the definition 252 and 254 , As shown, this "helical profile", as it appears in the plane S, symbolizes the area in the rapid prototyping system 6 exposed, printed, heated or the like. Here, therefore, the layered construction material is changed so that it is part of the cube to be produced 200 becomes. A variety of such profiles 262 is then in the manufactured body 200 the spatial longitudinal bar 212 with the profile 250 form.

In the 13 is another exemplary embodiment of a unit cell 210 with a rod element 270 shown. The rod element 270 is not here as a spatial diagonal in the unit cell 210 trained, but somehow stands in the unit cell. So is in the present embodiment according to the 13 neither the starting point 272 still the endpoint 274 of the rod element 270 at the boundary surfaces of the cube-shaped unit cell 210 , The profile of the rod element 270 can either one of the above profiles 240 . 250 be or else be trained. For example, it is also possible to provide the profile round or as an ellipse or the like. The possibilities of variation here are no limits, as it is in a simple manner according to the above statements, the user readily possible to specify the vertices and radii, etc.

Another exemplary embodiment of a unit cell 210 is in the 14 shown. Here is a rod element 280 arranged spatially different than in the embodiment according to the 13 , Here is the starting point 282 of the rod element 280 in the lower boundary surface XY. The endpoint 284 of the rod element 280 is in accordance with the 14 within the bounding XY plane. It should be noted that here is the point 286 a representation of the endpoint 282 another rod element of an adjacent unit cell 207 is.

Yet another exemplary embodiment of a unit cell 210 with another rod element 290 is in the 15 shown. Here is the starting point 292 of the rod element 290 on the lower edge in the lower XY plane of the unit cell 210 , The upper endpoint 294 of the rod element 290 is located here within the boundary surfaces of the unit cell 210 , The other points shown 296 . 298 . 300 show endpoints of other rod elements of adjacent unit cells 210 , Here is the rod element 294 again a different orientation than the bar elements of the other unit cells 210 as they are in 13 . 14 are shown.

A far more complex structure of a unit cell 210 is in the 16 shown as an example. This structure is a "diamond structure" and includes a variety of bar elements 402 . 404 . 406 . 408 . 410 . 412 . 414 . 416 , Each rod element 402 . 404 . 406 . 408 . 410 . 412 . 414 . 416 can either have the same profile or a different profile as in the 11 to be assigned. There are also other prefabricated space structures for unit cells 210 conceivable and storable in a database. Incidentally, it should be noted that, of course, also individually made by a user room structures for a unit cell 210 can be stored in a database for repeated use.

In the 17 is yet another exemplary embodiment of a cross-sectional profile 550 shown. Here is the cross-sectional profile 550 from four single bars 556 . 557 . 558 . 559 , each by start and end points 560 . 561 . 562 . 563 . 564 . 565 . 566 . 567 are fixed. In contrast to the cross-sectional profiles 240 . 250 as they are in the 9 respectively. 10 are shown here is the cross-sectional profile 550 for a rod element 212 not formed as a coherent profile, but includes several individual profiles. Finally, there is thus the rod element 212 which has a cross-sectional profile 550 is assigned, from four individual walls 556 - 559 ,

In the 18 is another exemplary embodiment of a space structure for a unit cell 210 shown. Here the room structure consists of three connected bar elements 602 . 604 . 606 , The rod element 602 extends from the starting point 601 to somewhere inside the unit cell 212 lying endpoint 603 , The starting point 601 lies in the upper XY plane of the unit cell 210 , The rod element 604 closes at the point 603 and ends at the point 605 in turn, in the middle of the unit cell space 210 lies. The quote point 605 of the third rod element 606 is with the end point of the rod element 604 identical. The endpoint 607 of the rod element 606 lies in the lower XY planes of the unit cell 210 , In the present embodiment of this unit cell 210 have the bar elements 602 and 606 the same cross-sectional profile, for example, the cross-sectional profile 250 according to the 11 , The rod element 604 that is between the two rod elements 602 . 606 has a different profile, for example the profile 550 according to the 17 , This will help in the actual construction of the body 200 produced in a layer plant a perforated vertical grid.

As will be readily apparent from the present explanations, it is readily possible for a user to design spatial structures also with complex formation for a unit cell 212 to accomplish. Also the profile design of the individual bar elements 212 is very easy and fast to perform. Due to the fact that now only one unit cell 210 The cutting data must be calculable very quickly and easily as often as it is necessary to cut in the S1-S10 layering. These cutting data are then transferred to the corresponding unit cells 210 of the whole body 200 copied and thus already lie the respectively necessary layer data S1-S10 for the entire body 200 in front.

Based on 19 - 22 It is readily apparent that it is possible for a user in a simple manner, a body 200 also in different groups of unit cells 702 . 704 . 706 embody. So is in the 19 shown that the body 200 in terms of the external dimensions of the unit cells resembling each other 702 . 704 . 706 is divided. A first group of unit cells 702 becomes a certain body area of the cube 200 assigned. In the step according to 20 now become certain unit cells of the body 200 another group of unit cells 706 assigned. This is the body 200 from a total of three different groups of unit cells 702 . 704 . 706 ,

In a further program step, a user would now correspond to the above statements of a unit cell of the first group 702 assign a specific spatial structure from unit cells. The same would be the user for the unit cells 704 . 706 the other groups of unit cells 704 . 706 carry out. There would then be the respective exemplary unit cell for each group of unit cells 702 . 704 . 706 cut according to S1-S10 as required. The respective slice data would then be in the respective unit cells associated with the same group of unit cells 702 . 704 respectively. 706 be copied. So in the end, all the necessary layer data of the body are in turn 200 for the production in a rapid prototyping system, although the body consists of a variety of fine spatial structures, which are also still different.

In the 21 is another exemplary embodiment for grouping in a cube to be produced 200 illustrated. So here is the cube 200 formed from an "outer shell" whose unit cells 704 all are equally trained and in the 21 are shown as light cubes. A second group of unit cells 702 forms an upper corner of the cube 200 , A third group forms an inner "shell" of unit cells 708 , The structure of the unit cells 708 may for example consist of a structure which is particularly suitable, the structure 702 and 704 connect to. As can be seen, the unit cells border 708 not all together, but form one the contents of the cube 200 only partially filling space. Each group of unit cells 702 . 704 . 706 . 708 In turn, a specific room structure is assigned. An exemplary unit cell 702 . 704 . 706 . 708 each group of unit cells 702 . 704 . 706 . 708 is cut in the required number of vertical sections. The corresponding height-cut data then becomes the corresponding unit cells of the respective groups 702 . 704 . 706 . 708 copied. It is then easily possible, the cutting data of each layer S1-S10 to produce the cube 200 with different spatial structure depending on the group of unit cells 702 . 704 . 706 . 708 manufacture.

The result of such a cut S is in the 21 visualized. The section S is here in relation to the cube 200 placed at a height z that he is below the group of unit cells 702 lies. The cut is thus such that in the group of unit cells 708 cross-shaped bevel cuts 801 arise. On average, S are from the second group of unit cells 704 in this section the cuts 803 arise. The unit cells within the contour 804 , what a 21 are not visible, no cross-sectional profiles are assigned. The cuts 801 the unit cells 708 be at the contour 804 cut off. The cuts 803 the unit cells 704 however, be at the contour 804 not cropped.

In the 23 Finally, an extremely highly schematic flow chart of an embodiment of the present invention is shown. So is in the step 1000 the program or method according to the invention is started. Via a memory device or otherwise, the 3D data of the 3D body to be produced are provided. In step 1003 the user will enter the desired layer thickness needed to make a body 200 necessary. Then in the step 1002 of the program the vertical sections of the body 200 established. In the next step 1004 the body splits up 200 into a variety of unit cells 210 , The user is free again in this program step, via the keyboard 4 of the computer system 1 the size and nature of the unit cell 210 pretend. The input step is here as a step 1005 shown. With completion of the step 1004 then determine what size the unit cells 210 have and how many groups of unit cells 210 the body 200 should include.

In the next step 1006 now becomes the cell structure of a unit cell 210 established. This will be done in the steps 1007 . 1009 by the user in the selected unit cell 210 Start and end point of a rod element and the profile of this rod element 212 Are defined. Until all rod elements 212 are defined with all profiles, the step becomes 1006 run through. Represents the final cell structure of a unit cell 210 fixed, then the same procedure is carried out again, if another group of unit cells 210 in the previous step 1004 was determined. Now, for each group of unit cells, if an exemplary unit cell in your space structure is finally determined, each unit cell becomes 210 in accordance with the number of cuts or height layers necessary for the production in laminating technology in the step 1008 cut. The for each exemplary unit cell 210 Cutting data obtained from a group of unit cells are then transferred to the other unit cells 210 copied to this group. This process is done in step 1010 ,

After completion of the step 1010 lie now for all necessary cuts of the body 200 required cutting data. In step 1012 can now optionally the cutting data of the unit cells 1010 with the body data 1002 be blended. Then in step 1014 the elevation data to the RP system 6 be sent, so now the body 200 in the user-defined embodiment with the respective unit cells 210 and whose spatial structure can be produced in the usual RP process.

In the 24a -c are unit cells 1110 . 1200 . 1300 shown with different cell structures 1-3. In the 24a a cell structure is shown consisting of four differently oriented rod elements 1101 consists. The structure 2 according to the 24b consists of three bar elements 1201 that are within the unit cell 1200 form a triangle. The structure according to the 24c consists of three bar elements 1301 that intersect at a common point and are perpendicular to each other.

In the 24d schematically shows how an exemplary embodiment of a compound of the structures 1 and 2 can be automatically created, this is a corner of the triangle of the structure 2 with a center of the quadrangle of the structure 1 with a rod element 1110 connected with a predetermined cross-section. In the in the 24e embodiment shown are three end points of the structure 3 with the center of a rod member 1101 Structure 1 via three bar elements 1114 connected. Finally, in the in the 24f shown embodiment, two unit cells 1300 with the structure 3 with a unit cell 1100 automatically connected to the structure 1. It is a corner point of the triangle of the structure 2, each with three end points of the structure 3 via one rod element each 1120 connected.

Such compounds of different cell structures of adjacent unit cells 1100 . 1200 . 1300 can be generated automatically, so that then a solid structure 1-3 cell-overlapping in the layer construction process is created. As a result, the effort for a user when creating the cell structures 1-3 can be reduced and otherwise possibly occurring loose connections are prevented.

The 25 Finally, the basic principle of a possible rotation and / or projection of a cross-sectional profile of a rod member in a simple and computer-saving manner, the cutting data of different height sections with the exemplary unit cell 210 to investigate. So is in the 25a a rod element 1501 shown the part of the exemplary unit cell 210 is. This rod element 1501 , which has been assigned a circular cross-section, is in the in 25 shown side view of the unit cell 210 perpendicular to the sectional plane S. Accordingly, it is readily apparent that an intersection of this rod element 1501 with the sectional plane S of the circular cross-section itself.

The other, also in the 25a ge showed second rod element 1502 the same exemplary unit cell 210 has like the rod element 1501 a circular cross-section. The second rod element is in the in 25a shown side view relative to the cutting plane S by an angle α = 45 ° rotated. Due to the known angle α = 45 °, it is readily possible to calculate how the circular cross section is imaged onto the cutting plane S. But you already have the required cutting data of the rod element 1502 with the cutting plane S.

The third rod element 1503 that in the 25a is shown, on the one hand in the side view by an angle α = 15 ° relative to the cutting plane S is rotated, moreover, it is also in the in 25b shown top view rotated by an angle β = 45 °. Because of these two angles α, β, it is readily possible to determine how the circular cross-section of the rod element 1503 in the sectional plane S is mapped. So is in the 25b shown how the circular cross-section is projected onto the cutting plane, if only the angle α is taken into account. In the 25c is then shown that the angle β is taken into account, so that in 25b indicated cross section on the one hand still rotated by the angle β and the other is still "stretched" 25d is shown as an example, as the circular cross section of all rod elements 1501 . 1502 . 1503 in the sectional plane S, the circular cross section would not be projected, rotated and stretched taking into account the angles α, β.

Claims (20)

Method for generating layer data in a computer system ( 2 - 4 ) for the production of three-dimensional bodies ( 100 . 200 ) with structured body interior ( 202 ) by means of a laminating system ( 6 ), which comprises the following method steps: a) providing the body data of the three-dimensional body to be produced ( 100 . 200 b) determining a layer thickness of the vertical sections (S1-S10) used for producing the three-dimensional body ( 100 . 200 ) by means of the Rapid Prototyping System ( 6 c) splitting the three-dimensional body ( 100 . 200 ) into a plurality of three-dimensional unit cells ( 210 ), d) defining a cell structure ( 212 ) for the unit cells ( 210 ), wherein the cell structure consists of at least one elongated rod element ( 212 ) whose length is defined by two spaced-apart spatial points ( 214 . 216 ) within a unit cell ( 210 ) and that a certain cross-sectional profile ( 240 . 250 . 260 . 270 ), e) cutting the unit cell ( 210 ) in step d) with the specified cell structure ( 212 ), one or more times according to that for the generation of layer data of the three-dimensional body ( 100 . 200 ) required number of height sections (S1-S10), f) copying the layer data obtained in step e) into the other unit cells ( 210 ), which correspond to the unit cell cut in step e) ( 210 ) are intersected by the height sections (S1-S10). g) outputting the individual height layer data of the now with a structured body content ( 202 ) provided three-dimensional body ( 100 . 200 ) for the control of a laminating system ( 6 ). Method according to claim 1, characterized in that the height of a unit cell ( 210 ) is set as an integer multiple of the distance between two adjacent height layers (S1-S10). Method according to claim 1 or 2, characterized in that in step d) the cross-sectional profile ( 240 . 250 . 260 . 270 ) can be selected by the user from a plurality of stored in a database, defined cross-sectional profiles. Method according to claim 1 or 2, characterized in that in step d) the cross-sectional profile ( 240 . 250 . 260 . 270 ) can be set freely by the user. Method according to one of the preceding claims, in which the three-dimensional body ( 100 . 200 ) into several groups () of unit cells ( 210 ) and accordingly: - the step c) is modified as follows: splitting the three-dimensional body ( 100 . 200 ) into a plurality of three-dimensional unit cells ( 210 ) a first group of unit cells ( 702 ) and at least one further plurality of three-dimensional unit cells ( 704 . 706 ) another group of unit cells ( 704 . 706 ), - the step d) is modified as follows: defining a cell structure for the unit cells ( 702 ) of the first group of unit cells ( 702 ), wherein the cell structure consists of at least one elongated rod element ( 212 ) whose length is defined by two spaced-apart spatial points ( 214 . 216 ; 272 . 274 ; 282 . 284 ; 292 . 294 ) within a unit cell ( 210 ) and that a certain cross-sectional profile ( 240 ; 250 ; 550 ) and defining a cell structure for the unit cells ( 704 . 706 ) of the at least one further group of unit cells ( 704 . 706 ), wherein the cell structure of the unit cells ( 704 . 706 ) the at least one further group optionally from at least one elongate rod element ( 212 ; 602 . 604 . 606 ) with a certain cross-sectional profile ( 240 ; 250 ; 550 ) whose length is defined by two spaced-apart spatial points ( 214 . 216 ; 272 . 274 ; 282 . 284 ; 292 . 294 ) within the unit cell ( 704 . 706 . 708 ) of the at least one further group of unit cells ( 704 . 706 . 708 ), step e) is modified as follows: cutting of those unit cells ( 702 . 704 . 706 . 708 ), which were provided in step d) with the respective defined cell structure, one or more times corresponding to that for the generation of layer data of the three-dimensional body ( 200 ), the step f) is modified as follows: copying the layer data obtained in step e) into the other unit cells ( 702 . 704 . 706 . 708 ) of the associated group of unit cells ( 702 . 704 . 706 . 708 ), which correspond to the unit cell cut in step e) ( 702 . 704 . 706 . 708 ) of the same group of unit cells ( 702 . 704 . 706 . 708 ) are intersected by the height sections (S1-S10). Method according to one of the preceding claims, characterized in that in the event that the cell structure is a rod element ( 212 ) whose start and end point ( 214 . 216 ; 272 . 274 ; 282 . 284 ; 292 . 294 ) in the plane of a vertical section (S1-S10) of the three-dimensional body to be produced ( 200 ), this rod element ( 212 ) is tilted automatically by a predetermined angle relative to the plane of the vertical section (S1-S10). Method according to one of the preceding claims, characterized in that the cutting data of a cross-sectional profile ( 240 ; 250 ; 550 ) of a rod element ( 212 ; 1501 . 1502 . 1503 ) as a function of the orientation (α, β) of the rod element ( 212 ; 1501 . 1502 . 1503 ) relative to the cutting plane (S). Method according to claim 5, characterized in that the cross-sectional profiles ( 240 ; 250 ; 550 ) of bar elements ( 212 ) in unit cells ( 702 . 704 . 706 . 708 ) a group of unit cells ( 702 . 704 . 706 . 708 ) with the cross-sectional profiles ( 240 ; 250 ; 550 ) of bar elements ( 212 ) in unit cells ( 702 . 704 . 706 . 708 ) another, adjacent group of unit cells ( 702 . 704 . 706 . 708 ) at defined connection points of these unit cells ( 702 . 704 . 706 . 708 ) get connected. Method according to one of the preceding claims, characterized in that the fixed cell structure ( 212 ) corresponds to a negative body volume. Method according to one of the preceding claims, characterized in that the cross-sectional profiles ( 240 ; 250 ; 550 ) of the unit cells ( 210 ; 702 . 704 . 706 . 708 ) with the contour data of the body ( 200 ) are blended Method according to one of the preceding claims, characterized in that the body data of several bodies ( 200 ) come. Method according to one of the preceding claims, characterized in that the body data in differently arranged and / or aligned unit cells ( 210 ; 702 . 704 . 706 . 708 ). Method according to one of the preceding claims, characterized in that the groups of unit cells ( 210 ; 702 . 704 . 706 . 708 ) form certain patterns or shells Method according to one of the preceding claims, characterized in that the unit cells ( 210 ; 702 . 704 . 706 . 708 ) are subjected to displacement and / or rotation by a certain angle relative to a preceding cell. Method according to the above claims, characterized in that the cell structures ( 212 ) can be combined with completely solid areas. Method for generating layer data in a computer system ( 2 - 4 ) for the production of three-dimensional bodies ( 100 . 200 ) with structured body interior ( 202 ) by means of a laminating system ( 6 ), which comprises the following method steps: a) providing the body data of the three-dimensional body to be produced ( 100 . 200 b) determining a layer thickness of the vertical sections (S1-S10) used for producing the three-dimensional body ( 100 . 200 ) by means of the Rapid Prototyping System ( 6 c) splitting the three-dimensional body ( 100 . 200 ) into a plurality of three-dimensional unit cells ( 210 ), d) defining a cell structure ( 212 ) for the unit cells ( 210 ), wherein the cell structure consists of a number of different cross-sectional profiles ( 240 ; 250 ; 550 ) within a unit cell ( 210 ), e) cutting the unit cell ( 210 ) in step d) with the specified cell structure ( 212 ), one or more times according to that for the generation of layer data of the three-dimensional body ( 100 . 200 ) required number of height sections (S1-S10), f) copying the layer data obtained in step e) into the other unit cells ( 210 ), which correspond to the unit cell cut in step e) ( 210 ) are intersected by the height sections (S1-S10). g) outputting the individual height layer data of the now with a structured body content ( 202 ) provided three-dimensional body ( 100 . 200 ) for the control of a laminating system ( 6 ). Method for generating layer data in a computer system ( 2 - 4 ) for the production of three-dimensional bodies ( 100 . 200 ) with structured body interior ( 202 ) by means of a laminating system ( 6 ), in which the three-dimensional body ( 100 . 200 ) into a plurality of three-dimensional unit cells ( 210 ) in an exemplary unit cell ( 210 ) a spatial cell structure ( 212 ) and layer data of the exemplary unit cell ( 210 ) into the other unit cells ( 210 ) are copied. Structure generator ( 2 ) for creating height layer data of a three-dimensional body ( 200 ) with structured body interior ( 212 ) by means of a laminating system in a computer system ( 1 ), comprising a) an input device ( 4 ), comprising - a user the number of height sections (S1-S10) used to make the three-dimensional body ( 200 ) are desired by means of the layer construction system, specifies, - a user the three-dimensional body to be produced ( 200 ) into a desired number of three-dimensional unit cells ( 210 ; 702 . 704 . 706 ), - a user a cell structure for the unit cells ( 210 ; 702 . 704 . 706 ), wherein the cell structure consists of at least one elongate rod element ( 212 ) whose length is defined by two spaced-apart spatial points ( 214 . 216 ; 272 . 274 ; 282 . 284 ; 292 . 294 ) within a unit cell ( 210 ; 702 . 704 . 706 ) and that a certain cross-sectional profile ( 240 ; 250 ; 550 ), - a display device ( 3 ) for displaying the virtually created unit cells ( 210 ; 702 . 704 . 706 ) and the associated spatial structures; b) a computing device ( 2 ) generating cutting data according to the method of any of claims 1-16; c) an output device ( 5 ), the individual height layer data of the now provided with a structured body content three-dimensional body ( 200 ) for the control of a laminating system ( 6 ). Use of Layer Data of an Exemplary Unit Cell ( 210 ) of a three-dimensional body ( 100 . 200 ) with structured body interior ( 202 ), which is divided into a plurality of unit cells ( 210 ) for generating the layer data in a computer system ( 2 - 4 ) for the production of the entire three-dimensional body ( 100 . 200 ) with structured body interior ( 202 ) by means of a laminating system ( 6 ). Computer readable medium having thereon by a computer ( 2 ) executable instructions that cause the computer system ( 2 ) the method for generating layer data for the production of three-dimensional bodies ( 200 ) with structured body interior ( 212 ) by means of a laminating system according to one of claims 1-17.