JP6856717B2 - Modeling method and modeling system - Google Patents

Description

This disclosure relates to the general field of computer-aided technology ("CAX"), which includes computer-aided design, computer-aided drawing ("CAD"), computer-aided engineering ("CAE"), and computer-aided manufacturing. Manufacturing ("CAM"), and visualization systems (individually and collectively as "CAD systems"), Product Lifecycle Management ("PLM") systems, and equivalent systems that manage data for products and other items. (These are collectively referred to as a "Product Data Management" system or PDM system).

Background of the present disclosure The PDM system manages PLM and other data. Improved methods and systems are desired.

Summary of the Disclosure The various embodiments disclosed include geometric element modeling methods performed on a geometric element model by a data processing system that includes a kernel and associated applications, as well as methods and data processing for modeling the product. The system is included.

According to the first aspect, a geometric element modeling method performed on a geometric element model by a data processing system with a kernel and related applications is to receive data about an object to be processed by the kernel, the geometric element model. Includes creating standalone objects and storing standalone objects for your user interface applications.

This method also detects changes to the object to be processed by the kernel, propagates those changes to the memorized standalone object to update the standalone object, and memorizes the updated standalone object. Can include. In this case, the object to be processed by the kernel can include one of meshes or polylines.

This method also receives input to a function in the data processing system via the user interface, an instruction to select the output format of the function, except that the output format is a faceted output or classical geometric element. Has one of the boundary representation outputs of, processing the input to the function, applying the selected output format to the processed input, and processing the processed input in the selected output format. It can include to output.

This method also imports legacy mesh file data into a data processing system, generates faceted mesh files from the imported data, and stores faceted mesh files for further processing. That can include.

According to the second aspect, the method of modeling the product comprises: deriving the mesh data for one or more regions of the product and representing the one or more regions as mesh regions. However, the mesh data contains a connected collection of multiple facets, derives a classical geometric element representation of one or more regions of the product, and represents one or more regions as classical geometric element regions. However, the classical geometric element representation includes curved surfaces, and the mesh data and the classical geometric element data differ from each other in that the data processing system receives an instruction to select at least one mesh region of the product, in the data processing system. Receive instructions to select at least one classical geometric element region of the product, establish a relationship between the mesh region and the classical geometric element region, based on the established relationship, a structural body part or a tool for manufacturing To develop updated data for one of the mesh regions or classical geometric element regions, to propagate changes in the data, regardless of the data format, based on the derived relationships, and Includes supplying tools for updated structural body parts or modeled products.

Different regions of a product can be modeled in different data processing formats, establishing relationships between different regions of the product and updating for one data object in the other region, regardless of the data format. Can be propagated to.

This method can further include deriving the relationship between the inner surface of the mesh region and the outer surface of the classical geometric element region. The mesh data representing the exterior or appearance is propagated throughout the structural parts and associated tools represented by classical geometric elements without the need for any format conversion or delaying the design process until the appearance is finalized. can do. Changes in the data for one of the mesh regions or the classical geometric element regions can be propagated to other regions regardless of the data format.

Mesh data can be derived from physical samples of one or more parts. In this case, the mesh data can be derived by scanning the physical sample. The method can further include storing the mesh data in a storage device as a collection of multiple facets.

The classical geometric element representation can be derived by simulation in a data processing system. The method can further include memorizing the representation of the modeled product. The method can further include generating instructions for manufacturing body parts or tools. In this case, the manufacturing instruction can include an instruction for laminated modeling.

According to a third aspect, a data processing system having at least one processor and accessible memory and configured to model the product can perform the following steps. That is, a step of deriving mesh data for one or more regions of a product and representing one or more regions as mesh regions, where the mesh data contains a connected collection of facets of the product. Steps to derive a classical geometric element representation of one or more regions and represent one or more regions as classical geometric element regions, where the classical geometric element representation includes curved surfaces, mesh regions and classical geometry. Unlike the element regions, the data processing system receives an instruction to select at least one mesh region of the product, and the data processing system receives an instruction to select at least one classical geometric element region of the product. And the step of establishing the relationship between the mesh area and the classical geometric element area, and the step of developing a structural body part or a tool for manufacturing based on the established relationship, and the mesh area or the classical geometric element area. For the step of supplying updated data for one of them, the step of propagating changes to the data based on the derived relationships, regardless of the data format, and for the updated structural body part or modeled product. Can include steps to supply tools and.

According to this system, the established relationship is between the inner surface of the mesh region and the outer surface of the classical geometric element region. The system can further include a display configured to output a representation of the modeled area. The system can further include a storage device that stores a representation of the modeled area. The system can further include a scanner that scans a physical sample of one or more parts and thereby derives mesh data.

According to a fourth aspect, a non-transitory computer-readable medium coded by an executable instruction, in which one or more data processing systems model the product when the above instructions are executed. Implemented and this method includes: That is, to derive mesh data for one or more regions of a product and represent one or more regions as mesh regions, where the mesh data includes a connected collection of multiple facets and is one of the products. Derivation of geometric element representations of one or more regions and representing one or more regions as classical geometric element regions, where classical geometric element representations include curved surfaces, and what are mesh regions and classical geometric element regions? Different from each other, in a data processing system, receive an instruction to select at least one mesh region of a product, in a data processing system, receive an instruction to select at least one classical geometric element region of a product, a mesh region and a classic. Establishing relationships with geometric element regions, developing structural body parts or tools for manufacturing based on established relationships, updated for one of mesh regions or classical geometric element regions Includes supplying data, propagating changes in the data based on derived relationships, regardless of data format, and supplying tools for updated structural body parts or modeled products. ..

The description so far is rather a rough outline of the features and technical advantages of the present invention so that those skilled in the art can better understand the following detailed description. The additional features and advantages of the present disclosure that form the gist of each claim are set forth below. As those skilled in the art will understand, those skilled in the art can immediately use the disclosed ideas and specific embodiments as a basis for modification or different structural design to achieve the same objectives as the present invention. Moreover, one of ordinary skill in the art will appreciate that such equivalent structures do not deviate from the broadest form of the present disclosure.

Before going into the detailed description of the invention below, it may be helpful to define some terms and expressions used throughout this specification. The terms "include" and "have" and their derivatives mean inclusion without limitation. The term "or" is inclusive and / or means. Further, the term "controller" is any device, system or part thereof that controls at least one operation, whether the device is implemented as hardware, firmware, software, or any combination of at least two of them. Means that. Furthermore, I would like to mention here that the functions associated with any particular controller, whether local or remote, may be centralized or decentralized. Definitions for some terms and expressions are defined throughout the specification and, as will be appreciated by those skilled in the art, such definitions are used in many, if not most, cases. It applies to both previous and future uses of the terms and expressions defined here. Although some terms can include a wide variety of embodiments, the appended claims may explicitly limit those terms to a particular embodiment.

Next, an example of the method and the data processing system according to the present disclosure will be described with reference to the accompanying drawings.

It is a block diagram which shows the data processing system which can realize one embodiment. It is a figure which shows the structural shape to which the method by this disclosure can be applied. It is a figure which shows an example of the synergistic component which can be designed according to the method by this disclosure. It is a figure which shows one of the parts by FIG. 3 separately. It is a figure which shows a part of the product which can be designed according to the method by this disclosure. It is a figure which shows an example of the component designed in a plurality of different formats. It is a figure which shows the step included in the conventional part modeling process. It is a figure which shows the part scanned according to the embodiment of this disclosure. It is a figure which shows the part of FIG. 8 by embodiment of this disclosure in detail. It is a figure which shows the part finished according to the embodiment of this disclosure. It is a figure which shows the processing step in the exemplary part manufacturing method by embodiment of this disclosure. It is a flowchart which shows the conventional process. It is a flowchart which shows the process by embodiment of this disclosure.

Detailed Description Although the basic principles of the present disclosure in the present specification will be described with reference to the embodiments shown in FIGS. 1 to 13, these embodiments are for illustrative purposes only, and the scope of the present disclosure is extended in any respect. It should not be seen as limiting. As will be appreciated by those skilled in the art, the basic principles of the present disclosure can be implemented in any properly configured device, device, system or method.

FIG. 1 shows an example of a data processing system that can implement one embodiment of the present disclosure, eg, a CAD system configured to carry out the process described herein. The data processing system 21 includes a processor 22 connected to the local system bus 23. The processor is connected to the main memory 24 and the graphics display adapter 25 by the local system bus, and the graphics display adapter 25 can be further connected to the display 26. The data processing system can communicate with other systems via a wireless user interface adapter connected to the local system bus 23, or, for example, via a wired network leading to a local area network. Additional memory 28 can also be connected via the local system bus. A suitable adapter, such as the wireless user interface adapter 27, for other peripherals such as the keyboard 29 and mouse 20 or other pointing device allows the user to supply input to the data processing system. Other peripherals may include one or more I / O controllers such as a USB controller, a Bluetooth controller, and / or a dedicated audio controller (connected to a speaker and / or a microphone). Similarly, it should be understood that different peripherals can be connected to a USB controller (via different USB ports). As their peripherals, input devices (eg keyboards, mice, touch screens, trackballs, cameras, microphones, scanners), output devices (eg printers, speakers), or supply input or receive output from data processing systems. Included are any other type of device that behaves like this. Further, it should be understood that many devices, called input devices or output devices, can supply inputs and receive the output of communication with the data processing system. More importantly, other peripheral hardware connected to the I / O controller can be any type of device, machine or component configured to communicate with a data processing system. Is.

The operating system included in the data processing system allows the output from the system to be displayed to the user on the display 26 and further allows the user to interact with the system. Examples of operating systems that can be used in data processing systems include Microsoft Windows®, Linux®, UNIX®, iOS® and Android® operating systems. ..

In addition to these, it should be understood that the data processing system 21 can be implemented in a network environment, a distributed system environment, a virtual machine in a virtual machine architecture, and / or a cloud environment. For example, the processor 22 and associated components can correspond to one virtual machine running in a virtual machine environment of one or more servers. Examples of virtual machine architectures are VMware ESCi, Microsoft Hyper-V, Xen and KVM.

As can be appreciated by those skilled in the art, the hardware shown for the data processing system 21 can be modified to suit a particular implementation. For example, the data processing system 21 in this example can correspond to a computer, workstation and / or server. However, it should be understood here that an alternative embodiment of a data processing system can be composed of appropriate or alternative components, such as mobile phones, tablets, controller boards. , Or other data processing systems, computers, processors and / or other functions and features that operate to perform the functions and features described herein in association with the operations of the controllers described herein. It can be configured as any form of system. The illustrated examples are provided for illustrative purposes only and are not intended to be structural restrictions with respect to the present disclosure.

The data processing system 21 can be connected to a network (not part of the data processing system 21), which, as is well known to those skilled in the art, is a public or dedicated data processing system network or a combination of multiple networks. This includes the Internet. The data processing system 21 can communicate over the network with one or more other data processing systems, such as a server (which is also not part of the data processing system 21). However, one alternative data processing system can correspond to a plurality of data processing systems implemented as part of a distributed system, and in such a distributed system, a plurality of data processing systems. Multiple associated processors can be brought into communication via one or more network connections, and those processors jointly perform the tasks described as being performed by a single data processing system. Can be carried out at. Therefore, when referring to one data processing system, the point that such a system may be implemented over a plurality of data processing systems built in a distributed system communicating with each other via a network. I want to be understood.

A conventional CAD model is composed of a plurality of faces connected to each other along a shared ridgeline. One face is only one area of the larger surface on which this face is located. Many types of surfaces are used. The most common are quadric surfaces such as cylinders or cones, and the most complex are non-uniform rational base splines (NURBS) free-form surfaces. For example, as shown in FIG. 2a, many of these surfaces are spatially curved and are sometimes referred to as curved or curved models. Other common types of models consist exclusively of multiple small flat faces that simulate curved faces. This model looks like a gemstone and uses a number of small flat faces called facets 1, which together give a curved appearance, for example as shown in FIG. 2b. Models constructed in this way are called "facet" models or "polygon" models.

Faceted models are becoming more and more popular. They often result from many different sources as a result of some scanning process. Scanning has become an even more common practice as scanner quality has improved rapidly and prices have fallen, for example, the first design formed as a physical model of wood or clay or wax. A facet model can be obtained by scanning. The reason this is commonly done is that "soft" features of the design, such as the feel of the product to the user, such as the handle of a tool or the casing of a cell phone or the feel of a computer mouse, are not from simulations. This is because the user cannot recognize it. In addition to this, toys or jewelry may be designed by craftsmen, in which case they then need to be mass-produced by machine.

Another source of scanning is when scanning is done for a reverse engineer product, for example to create a replacement part to maintain equipment that remains longer than the original company that made the part, or For example, if the original mechanical drawing is lost, or if the physical shape of the design, such as an embossed plate, changes during testing. In the future, scan data may be used to create surgical alternatives such as teeth or bones. Those replacement parts must be fitted in the proper position, for the purpose of creating a corresponding jig 3 for fitting the knee replacement 2 as depicted in FIGS. 3 and 4, for example. It is desirable to be able to process this data with a classical geometric element model. In addition, custom fit designs have future applications, in which data from body scanners are used for products such as shoe braces, hearing aids, diving masks or artificial limbs.

Traditionally, scan data in facet models had to be manipulated by facet-specific software, and therefore those scan data had to be exported to a non-history-based non-parametric format. Even if scan data is imported as a facet model into a CAD system such as NX software available from Siemens Product Lifecycle Management Software Inc (Plano, TX), the facet model is an integral part of the workflow for component modeling. It was not a converted part. The reason is that if a faceted model is used, a "surfing" step will be required, in which the point cloud or faceted object is idiomatic with curved surfaces. It is converted into the CAD model of. Reconstructing a facet model using a curved surface, for example, reconstructing a facet model using a boundary representation model or an analytic geometry element is time-consuming and laborious. Temporary analytic geometry may have been generated before the surface model could be used in applications such as part modeling, otherwise the surface model could be used. I would have had to wait for it to happen. Moreover, such surfing steps are on the critical steps of many typical industrial workflows. That is, downstream tasks such as designing fitting parts and tools or examining interior packages cannot begin until the "surfing" step is complete.

This problem is particularly serious in situations such as the automotive styling 4 depicted in FIG. 5, or in the manufacture of medical implants. In the case of automotive styling, new versions of the facet model are released cyclically, which forces the surfing step to be redone, and in the case of medical implant manufacturing, the CAD model of the existing bone. It is impossible to create by conventional component modeling in the first place. However, it is possible to scan bones to generate faceted representations.

As mentioned above, if the scanned bones can be modeled in the CAX system using analytical or boundary representation models rather than facet-based models, fitting operations or fitting operations or in parts created from those scanned bones. Better results can be obtained by performing supporting operations. Another example in which a hybrid model based on boundary representation and facets is advantageous is when manufacturing an article as shown in FIG. In this case, the mold portion 5 relies on the faceted details of the product 6, and the other portion 7 is analyzed so that exact dimensions are guaranteed to interact with the equipment in which the mold is used. You need to use a model. As used herein, the term "facet" refers to one triangular region in one plane, a mesh refers to a concatenated collection of multiple facets, and the classical geometric element representation is defined as. It is a geometric element representation based on a curved surface.

7a-7e clearly depict the conventional process. As shown in FIG. 7a, an engraved or molded outer shape 10 is prepared as a physical embodiment formed from a medium such as wood or clay. The physical product 10 is scanned as shown in FIG. 7b and the scanned data is imported into the CAD system where the data is transformed, i.e. scanned as shown in the image of FIG. 7c. A surface that matches the data is constructed. Further, as shown in FIG. 7d, an offset is applied to form the inner wall 12, and structural details such as ribs 13 and boss 14 are added as shown in FIG. 7e. Thus, the outer surface 15 of the shell 10 is, of course, represented by facets, but for all subsequent steps of this process, those facets are transformed into surfaces or classical geometric elements in subsequent processing. When the conventional CAD model is used, it is necessary to convert the outer shape to a curved surface model before continuing the process for the above workflow. The reason is that current modeling operations such as off-setting and Boolean operations do not work with a mixture of facets and classical surfaces. The facet-to-curve-model to surface-to-surface conversion slows down product and tool development, which can be frustrating for users and costly for the business. ..

It has been desired to improve the user interface software to speed up the process of converting scan data to curved surface models. Some systems have a dedicated "rapid surfing" function whose purpose is to allow easy conversion from faceted models to curved models. However, even with the best software, conversion still takes time and effort. Complex and intricate shapes can take days to convert. Applicant's decision is to improve modeling by substantially or completely eliminating the conversion to a curved surface model, rather than following such a process. As detailed below, this disclosure provides a method that allows the facet model to be used directly, which removes the "surfing" step from the critical process and has other advantages as well. In particular, a great deal of time savings are achieved. This has the advantage of having other advantages, whether the design data is held in faceted form or in classical geometric element representation. Model changes can be made for all parts. According to the systems and methods according to the present disclosure, a full-featured CAX system is realized, which makes a hybrid model, that is, a mixture of polygon meshes and curved surfaces, completely into history operations or feature-based modeling operations. Can be involved. Traditionally, even with CAD systems, hybrid bodies could not be used, or even simply faceted bodies, in feature-based modeling operations. Since facets are not available in most conventional modeling operations, users have not been able to use all of the features available in their modeling system for facet data. Although there are some specialized systems that allow modeling with facet bodies, they do not support the latest structural and editing techniques using features, history and associations.

The modified method can be understood in that the off-setting or shelling or thickening operations and details are applied directly to the faceted model obtained from scanning. Offsets are applied to the thin-walled shell 10 generated from the scanned physical objects for the purpose of forming an inner wall with respect to the scanned outer wall. This offset is applied to the faceted scanned shape 15 without converting the scanned shape to a surface representation. The facets on the inner surface 16 shown in FIGS. 8 and 9 may be fairly crude, as their shape is not particularly critical as long as the inner surface is substantially constant from the outer surface. In addition, the design step forms several ribs 13 and bosses 17 inside the shell to reinforce the structure and provide attachment points for various components, as shown in FIG. It is possible to include component modeling such as. For this purpose, surface representation is used instead of mesh. The inner geometric elements are created with rib and boss features, and what is needed for them is that the geometric element kernel supports extrusion, draft and Boolean operations. The end result of the above process is a B-rep (boundary representation) with a mixture of facets and classical geometric elements. Faces 15 and 16 are meshes, that is, aggregates of a plurality of facets, while faces 17 and 14 are analysis cones and analysis cylinders, respectively.

11a-11d outline the steps in the method according to the present disclosure. As shown in FIG. 11a, a physical model 10 is created, which is generally clay or wood, but other materials may be used. As shown in FIG. 11b, a scan 15 of the outline of this physical model is generated. The scanned shape is facet data, which is represented as a mesh or as a collection of points in multiple triangles in this example. As shown in FIG. 11c, an inner surface 16 is formed, which is also represented as a mesh. The internally required parts are then modeled using classical geometric element representations rather than facet-based representations, as shown in FIG. 11d. In the examples shown here, they are the analysis cone 17 or the analysis cylinder 14. The user interface can perform modeling operations on a variety of surface types, whether mesh, cylinder, or cone. CAD functions can be applied directly to any of the objects, whether analytical or faceted. Instead of waiting for the classical geometric element representation of the final transformed surface to be prepared, start downstream tasks such as designing fitting parts or packages with the faceted version of the outer surface. Can achieve improved productivity. The reason this is achieved is that off-setting or the addition of simple inner shapes and other subsequent geometric element operations are all associate or history-based, thus replacing the outer mesh with a new mesh. If so, you don't have to do any rework to adapt to this change, just replay the history to get a new design.

The user interface described in the present disclosure has a history-based modeling function that allows a mixture of faceted models and curved surface models as input. The systems and methods described herein allow for associative transformations from classical geometric element models or analytical bodies to facet-based models, i.e. curves to facets. Traditionally, the conversion from analytical bodies to faceted bodies has not been associative. The facet body could not propagate changes from parent to child because it did not remember having the analytic body as its parent.

The fundamental requirements of software users and programmers are different. Any software used in computer-aided design and computer-aided engineering has two distinct elements. The part of the CAX system that can be seen by the designer and technician provides a conceptual view of the model, which is accessible to the designer through the user interface, while each system provides a programming interface. It has a geometric element kernel that is accessed through, which allows the CAX programmer to set changes to its operation.

In the user interface of the CAX system, it is important for the user to be able to distinguish between different types of objects that the geometric element kernel can consider as objects. This is because of the faceted shape rather than the data originally generated as an analytical or classical geometric element representation, as in the boundary representation model traditionally represented by the user interface as faces, ridges, seat bodies and solid bodies. A mesh face, polyline ridges, faceted seat bodies, and faceted solid bodies are defined so that the user can determine if changes have been made to the originally generated data. .. In this way, unified modeling functions can work in the same way on conventional curved bodies, faceted bodies, and bodies in which they are mixed.

Newly defined objects in the user interface allow facet bodies to be used in associate copy operations. The associative characteristics of an operation are changes to a part of the design, whether the object is analytical, faceted-based, or a mixture of them, throughout the design. It means that it can be propagated over. The main advantage is that the user has to wait for the exterior design to be finalized before the joining and tooling steps are completed, eliminating the traditional delays and making changes to the exterior easy for the user. Can be entered in and other parts can be updated to accommodate the change.

Many CAD systems are built on top of the geometric element "kernel". The kernel provides tools for representing geometric element models and performing calculations on them. However, the kernel is just a programming toolkit used by CAD system developers, does not have a user interface, and usually does not have concepts like features, history or association.

The interaction between a degree 1 B-spline and LINE can be understood from the fact that the user interface stores standalone wireframe curves separately outside the system kernel. If a new curve type is introduced in the kernel, the corresponding curve type must be introduced in the user interface. The new curve is not just a "trumpet" of the kernel curve, but an object that is implemented independently of the user interface. In this particular case, due to the new curve type "PLINE" or "polyline" introduced in the kernel, the corresponding object is implemented in the user interface as a degree 1 B-spline curve.

When a B-spline curve of degree 1 is used as an input to a user interface, such as an Extrude, the user then chooses what type of object to generate as output. This output may be a faceted object or a conventional classical geometric element object. Certain functions have also been modified to allow the user to choose what type of output they want. This applies specifically to NX's Extrude and Revolve functions, as well as to some other functions that generate bodies from curves.

Traditionally, importing stereolithography (STL) files has been problematic. The reason is that when the STL file was imported into the user interface, the facet body could not be involved in the associative copy operation as described above. By incorporating the method according to the invention, a full-featured CAX system, including history-based modeling capabilities, will be able to use faceted models directly. As described in PCT Patent Application No. [later revised], Invention Name "data processing system and method", Applicant Reference Number 2015 P14906 WO, Filed on the same date as this application, the CAX system is a mesh. Can be treated as a surface and PILINE can be treated as a curve. The above documents shall be incorporated herein by reference to the extent permitted by law. This CAX system is based on a topology with minimal emphasis on individual geometric elements. In addition, the system modifies its functionality to accept faceted topologies.

History-based modelers can regenerate the final model in response to user input, which leverages analytic geometry to model facets and facets to model analytic geometry.

FIG. 12 depicts an example of a conventional body-in-white (BIW) development method, as opposed to the same process using the methods and systems according to the present disclosure shown in FIG. Product styling and BIW and tool development are separate but related workflows 30, 31. In the styling workflow 30, the first step 33 of digital authoring includes creating a physical model 34, scanning the model 35, and performing a surfing step 36, thereby analytic geometry model from faceted scan data. Is formed. From there, the first BIW and tool development phase 37 begins. The revision 39 of the physical model in the digital editing phase 38 of the styling workflow requires another scanning step 40 and another surfing step 41. At the end of the digital editing phase 38, all old surfaces in BIW and tool development must be replaced with new surfaces in stage 42. The next digital editing step 43 in the styling workflow 30 includes physical editing 44, another scanning step 45 and another scanning step 46 as before, and as a result, in BIW and tool development. The old surface that has already been replaced will be replaced again in step 47.

In contrast, FIG. 13 shows the methods and systems according to the present disclosure. In this case, the styling workflow 80 also begins with the creation of the physical model 83 and the scanning 84 of that model, which produces faceted scan data in the digital authoring phase 82. However, in this case, there is no need to wait for the surface transformation / generation step, and facet scan data is available directly for BIW and tool development workflow 81 during the first development phase 85, thus developing BIW parts and tools. Can be started early in the process with faceted versions of the surface that the customer will always see in the final product. In parallel with the beginning of this development phase 85, yet another digital edit 86 is performed in the styling workflow 80, including physical edit 87 and scanning 88. As soon as the scanned data is available, it can be fed to the BIW and tool development workflow 81, using history-based modeling features to propagate changes to the scanned data throughout the BIW and tools. Development 85 can be updated. In step 89, the surfaces are replaced with new surfaces, but they are in the form of facets and do not involve a surfing step. Only the changes required for previously developed analytic geometry elements need to be made by the model propagating those changes. The final digital edit 90 may include a surfaced step 91 in addition to the physical modeling 92 and scanning 93, or directly use the scanned facet data to generate instructions to manufacture the product exterior. This will replace the old outer surface with the new outer surface again in stage 94. Either way, it saves a great deal of time and processing effort, and if necessary, removes the surfing step from the critical process.

By providing a CAD system that can handle and revise both facet-based data and analysis data, the usefulness for users is improved. The ability to modify the analytical model with faceted details increases the usefulness of CAD systems. Taking the example of the automotive industry, customers can leverage initial scans to start building models and start adding more details. If analytic replacement can be used, the designer can replace the facet model with an analytic model, and the reproduction of history can still retain the final product. The selection and modeling of faceted entities (mesh and polylines) can be done in the same way as any other surface and curve type. The associative relationship of changes and the principle of propagation as described herein are particularly useful in modeling with a mixture of mesh data and classical geometric element data, as well as more generally.

The advantage is that the entire range of modeling techniques can be applied early in the customer's workflow, saving a great deal of time, and a standardized CAX system for mesh-based workflows such as medical implants or topology optimization. It is more likely to be used and can operate with real-world scanned models without the need to convert the scan data into a conventional (analyzed) model.

Although the examples have been described for the faceted data scanned so far, it is also possible to manually generate faceted objects in this system. In many cases, faceted objects can be created simply by calling a specific application programming interface (API) function in the kernel. In another case, the user interface requires an object that is different from what the kernel returns. In such cases, faceted objects need to be built "manually". Also, in some cases, it can be used to build parsing objects and generate facets. In yet another case, it is necessary to construct faceted objects from the first principle by generating individual facets and combining them with each other.

For certain examples of NX, certain operations that were previously only available for analytic data can also use facet-based data. These operations include wave linking, wave replacement, import from STL, extraction, Boolean, and facet cleanup. ), Thicken, shell, extend sheet, offsetting, trimming, splitting topologies, extrusion, imprinting, curve engraving (Curve imprinting), curve intersection, curve offsetting, transformations, mirroring, patterning, scale, fit analytic surface, Snip, fill hole, decimate, subdivide, smooth, global shaping, merge, draft, deviation , Curve, paint facet body, primitive detection, facet cleanup, shell, measurements, assembly component selection , Component replacement, assembly promotion, clearance analysis, component pattern, collision detection (assembly sequencing and move component) ), Assembly cut.

The present disclosure has a number of improvements over conventional methods of addressing various requirements in product design.

As will be apparent to those skilled in the art, some steps in the process described above may be omitted, may be performed simultaneously or sequentially, or in a different order, unless otherwise indicated or required by the sequence of operations. It may be carried out at.

Further, as will be appreciated by those skilled in the art, for simplicity and clarity, not all structures and operations of any data processing system suitable for use according to the present invention have been drawn or described herein. Instead, I have only drawn and described only the parts of the data processing system that are unique to the present invention or that are necessary for understanding the present invention. Other parts of the structure and operation of the data processing system 21 can be adapted to any of the various implementations and practices well known in the art.

Of particular note here is that although the invention contains description relating to a fully functional system, the mechanisms in the invention are at least partially as will be apparent to those skilled in the art. Distributable in any form as instructions stored on a machine-usable medium, a computer-usable medium, or a computer-readable medium, and the present invention is specific. Whatever type of instruction, signal carrier or storage medium is used, it is equally applicable to actually carry out such a distribution. Examples of machine-enabled / readable media or computer-enabled / readable media include: Non-volatile, immutable-coded types such as read-only memory (ROM). Media, or erasable and electrically programmable read-only memory (EEPROM), and user-recordable types of media such as floppy disks, hard disk drives, and compact disk-type read-only memory (CD-ROM), or Digital versatile disk (DVD).

The embodiments of the present invention have been described in detail so far, but as those skilled in the art can understand, various modifications, replacements, modifications, and variations without departing from the ideas and scope of the present invention disclosed in the broadest form. The improvements disclosed herein can be made.

None of the content of the present application should be read to the effect that any particular member, step or function must be included in the claims, and the scope of the invention is patented. It is determined only by the claims made. Moreover, if the strict word "means for" is not followed by a participle, none of these claims is intended to be subject to Article 112 (f) of the US Patent Act. Absent.

Claims (13)

A method of modeling a product, which includes:
Derivation of mesh data for one or more regions of the product and representing the one or more regions as mesh regions, where the mesh data comprises a connected collection of facets.
Derivation of a classical geometric element representation of one or more regions of the product and representing the one or more regions as a classical geometric element region, provided that the classical geometric element representation comprises a curved surface.
The mesh data and the classical geometric element data are different from each other.
In the data processing system, receiving an instruction to select at least one mesh region of the product,
Receiving an instruction to select at least one classical geometric element region of the product in the data processing system.
Establishing a relationship between the mesh region and the classical geometric element region,
To develop structural body parts or tools for manufacturing, based on the established relationships,
Supplying updated data for one of the mesh regions or the classical geometric element regions,
Propagating changes in the data, and propagating changes in the data, regardless of the data format, based on the derived relationships.
Supplying tools for updated structural body parts or modeled products,
Only including,
The method further comprises deriving the relationship between the inner surface of the mesh region and the outer surface of the classical geometric element region.
How to model a product. The mesh data is derived from a physical sample of one or more of the parts.
1 Symbol mounting method claim. The mesh data is derived by scanning the physical sample.
The method according to claim 1 or 2. The method further comprises storing the mesh data in a storage device as an aggregate of a plurality of facets.
The method according to any one of claims 1 to 3. The classical geometric element representation is derived by simulation in the data processing system.
The method according to any one of claims 1 to 4. The method further comprises storing the representation of the modeled product.
The method according to claim 5. The method further comprises generating an instruction to manufacture the body part or tool.
The method according to any one of claims 1 to 6. The manufacturing instruction includes an instruction for laminated modeling,
The method according to claim 7. A data processing system having at least one processor and accessible memory, the data processing system being configured to model a product.
Derivation of mesh data for one or more regions of the product and representing the one or more regions as mesh regions, where the mesh data comprises a connected collection of facets.
Derivation of a classical geometric element representation of one or more regions of the product and representing the one or more regions as a classical geometric element region, provided that the classical geometric element representation comprises a curved surface.
The mesh area and the classical geometric element area are different from each other
Receiving an instruction to select at least one mesh region of the product in the data processing system.
Receiving an instruction to select at least one classical geometric element region of the product in the data processing system.
Establishing a relationship between the mesh region and the classical geometric element region,
To develop structural body parts or tools for manufacturing, based on the established relationships,
Supplying updated data for one of the mesh regions or the classical geometric element regions,
Propagating changes to the data, and propagating changes to the data, regardless of the data format, based on the derived relationships.
Supplying tools for updated structural body parts or modeled products,
Only including,
The established relationship is between the inner surface of the mesh region and the outer surface of the classical geometric element region.
Data processing system. The system further includes a display configured to output the representation of the modeled region.
The system according to claim 9. The system further includes a storage device that stores the representation of the modeled area.
The system according to claim 9 or 10. Further including a scanner that scans a physical sample of one or more of the parts to derive the mesh data.
The system according to any one of claims 9 to 11. A non-transitory computer-readable medium coded by executable instructions.
When the instruction is executed, one or more data processing systems implement a method of modeling the product.
Derivation of mesh data for one or more regions of the product and representing the one or more regions as mesh regions, where the mesh data comprises a connected collection of facets.
Derivation of geometric element representations of one or more regions of the product and representing the one or more regions as classical geometric element regions, where the classical geometric element representation includes curved surfaces.
The mesh area and the classical geometric element area are different from each other
Receiving an instruction to select at least one mesh region of the product in the data processing system.
Receiving an instruction to select at least one classical geometric element region of the product in the data processing system.
Establishing a relationship between the mesh region and the classical geometric element region,
To develop structural body parts or tools for manufacturing, based on the established relationships,
Supplying updated data for one of the mesh regions or the classical geometric element regions,
Propagating changes in the data, and propagating changes in the data, regardless of the data format, based on the derived relationships.
Supplying tools for updated structural body parts or modeled products,
Only including,
The method further comprises deriving the relationship between the inner surface of the mesh region and the outer surface of the classical geometric element region.
Non-temporary computer-readable medium.

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