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CAD Software facilitates complete re-engineering.
September 19, 2008 -
PowerSHAPE Pro combines triangle modeling with hybrid surface and solid modeling to create Tribrid Modeling for re-engineering of existing products into improved or bespoke designs. Along with integration of CopyCAD reverse engineering, features include sculpting and model repair tools, ability to create CAD surfaces from triangle data, and ability to create perfect geometry. Analysis tools, also included, display differences between triangle mesh and resulting surface.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Delcam to Launch World's First "Tribrid Modelling" Software at TCT
At this year's TCT exhibition to be held at the Ricoh Arena, Coventry on 21st and 22nd October, Delcam will take CAD software to a new level with the launch of the first product development system to offer "Tribrid Modelling". "Tribrid Modelling" is a new version of Delcam's PowerSHAPE Pro design software that adds triangle modelling to the combination of surface and solid modelling currently offered in many existing packages as "hybrid modelling". The extended range of functionality is ideal for the re-engineering of existing products into improved or bespoke designs.
"Tribrid Modelling offers a better way of working for all companies developing new variants from existing designs, especially those making products that need to be personalised for a particular customer," claimed Delcam's CAD Product Marketing Manager, Chris Lawrie. "The combination of solid modelling, surface modelling and triangle modelling provides a unique design system for these companies. Having all the different modelling techniques in a single package reduces the need to transfer data between multiple programs and so streamlines the whole product development process."
"Most existing reverse engineering software is limited to capturing data and creating duplicates," claimed Mr. Lawrie. "This means that most companies then have to use a separate CAD system to re-engineer the existing design to produce an improved product or to generate a bespoke item for an individual consumer. By combining all three modelling techniques within PowerSHAPE, we can offer a complete re-engineering package in a single program. This allows companies to develop new variants on existing designs in a much more efficient way."
Delcam has developed this unique design approach through the integration of its CopyCAD reverse engineering and triangle modelling software into the earlier hybrid modelling version of PowerSHAPE Pro. This means that designers can move data captured with reverse engineering into the design environment more easily and so incorporate reverse engineered features into a design more quickly. However, the new combination is not just a simple bolting together of existing functionality. It incorporates a wide range of enhancements to many of the key operations.
For example, major improvements have been made to the sculpting and model repair tools previously available in CopyCAD to edit triangle files. These tools allow high-quality models to be produced from poor quality reverse engineering data, or from damaged or defective physical components. For example, uneven surfaces can be smoothed out, gaps in the data can be filled and extra points can be added in areas where only sparse data has been collected.
Most importantly, the combination of functionality from PowerSHAPE and CopyCAD has enabled easier, faster and more accurate creation of CAD surfaces from triangle data. The user still retains total control over the way the complete data set is divided into the component features and surfaces. However, each area can now be converted into CAD data by generating a network of curves and then projecting it onto the mesh of triangles. A single surface is generated within the complete set of curves using PowerSHAPE's Smart Surfacing functionality. This automatically analyses the curves and determines to most appropriate way to create the surface.
Analysis tools are available to display the differences between the triangle mesh and the resulting surface. This might show, for example, that a closer spacing between the curves would be needed in some areas of the model to keep the surfaces within the required tolerance.
The other key benefit of the integration of triangle modelling into PowerSHAPE Pro is the ability to create "perfect" geometry, in areas where any reverse engineering system would give only approximate results. For example, the design might include a flat surface, where reverse engineering will always give some ripples or other deviations. It is easy in PowerSHAPE Pro to delete the appropriate area and replace it with a perfectly flat surface. Similarly, reverse engineered fillets will always show variations in their radii along their lengths and they can be replaced with consistent, smooth fillets from PowerSHAPE.
There are also many examples where a combination of different techniques is needed to create a complete design. A typical example would be in the plastics industry, where initial hand-modelled prototypes are often produced in solid material. Reverse engineering from such models will only produce the external surfaces of the component. However, by using PowerSHAPE Pro, these surfaces can be offset by the material thickness to generate the internal surfaces. Extra geometric features, such as reinforcing ribs and bosses for fixing, can then be added with PowerSHAPE's solid modelling tools to complete the model.
Delcam's introduction of Tribrid Modelling provides the optimum software solution for the mass customisation of designs. Consumers are increasingly moving away from mass-produced products. This can be either because they want designs that are more individual or because they want an element of bespoke design, for example, for medical reasons or for increased comfort. This can only be achieved by incorporating reverse engineering alongside computer-based design methods.
Tribrid Modelling in PowerSHAPE Pro allows users to build up CAD models quickly and easily with data from different sources. It makes it easy to design the main outline of a product with CAD but to use hand models for complex details or decoration, or to capture specific data from a customer or patient. The extra data required can then be collected with a scanning device and combined with the main CAD model in the computer.
A similar approach can be taken when developing "new" parts that are, in fact, variations on existing components that were developed without CAD data. It is often quicker to digitise the existing part and limit the CAD work to the desired modifications, instead of completely recreating the whole part with CAD. This approach is particularly useful for companies, for example those in the ceramics industry, which update historic designs into modern reproductions.
"Tribrid Modelling offers a unique combination of design techniques," claimed Mr. Lawrie. "It will provide a more effective way of working for every industry that needs to provide regular, customised updates to its existing range of products." Company Information: Name: Delcam International Inc. Address: 3270 Electricity Drive City: Windsor Ontario N8W 5J1 State: CD Country: Canada Phone: 519 974 8088 FAX: 519 974 8170 http://www.delcam.com
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