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Introduction to Boundary Freeform and Fill Features Mark Biasotti SolidWorks Corporation January 21st 2008 Agenda n Why – What value do these features add to product design? n Advance capabilities - Introduction to SolidWorks Advanced modeling types n How - Determining use of Loft, Boundary, Fill, Freeform n Focus on Three: – Boundary introduction and examples – Fill introduction and examples – Freeform introduction and examples n Q&A Further Info n This presentation and example files will be available via download from the SolidWorks Website after the conference concludes. Why are these surface modeling features important? Why Surfacing verses Solid: § Can not be accomplished in one or a few solid features § Radii features will not suffice; need curve continuous surface connections for a seamless look § In other words: “How in the heck do I model that?” Why is surface modeling important? n Many products, although they look prismatic, are not. Curvature n Visual difference between curvature vs. tangent connection of surfaces Regular Fillet Curve Continuous Fillet Explanation of C0 thru C3 n Surface matching conditions explained C2 Condition – Surface boundaries share C0 Condition – Surface boundaries share C3 Condition – Surface boundaries share C1 Condition – Surface boundaries share Common edge with curvature matching Common edge but no tangency Common edge with curvature matching to Common edge with tangency but rate of greater degree than C2 curvature does not match at boundary Curve Continuous Equal Curvature – C2 Higher Degree – C3> An extensive set of modeling tools for complex shapes Sweep Shape C2 Fillets Fill Boundary Planar Loft Extrude FreeForm Revolve Dome Deformed Flex Ruled Will be discussing Boundary, Fill & Freeform Which Surface Feature to use? n Dissimilar or multiple profiles/Guides and need it to be solid: Use Loft n Similar profiles but change along length of shape: Use Sweep n Three or five or more boundaries: Use Fill n For high quality surfaces-only and C2 in both directions: Use Boundary n For modifying surfaces dynamically and without sketches: Use FreeForm Boundary Feature Background n Project started in 2004 for SW 2006 release as a mathematical replacement for Loft but was not ready until 2007 release. n Pro’s – Curve continuous matching in both directions – Unlike Loft, equal influence between first (profile) and second (guide curve) directions. – User controllable Surface Connectors – 1x1 curves can be created. – Additional UV and edge matching control. n Con’s – Surface only feature (no solid feature creation) – Can not do Centerline or Close Loop surfaces etc. Boundary Introduction Features: n Unlike Loft, there is not influence of curve direction 1 over curve direction 2. n tio i rec stD Fir Se co nd Dir ect ion n Because of this C2 matching can be applied to all sides. Boundary Introduction Features: n Can create surfaces with only 1 curve in each direction Boundary Introduction Features: n Can add connectors in both directions n For extraordinary influence of the surface Boundary Introduction Features: n No longer need to predefine explicit sketch or compound curves n One 3D sketch can provide all of these solutions Boundary Introduction Features: n Special Modifiers in the Property manager influence surface and provide different solutions. Ski Goggle Example Boundary Feature 2nd Boundary Feature Curve Influence options Guides have Guides go to equal influence next sharp Global To Next Sharp No edge here Guides go to Influence to next edge Next guide To Next Edge To Next Curve Connectors Fill Feature Background n Introduced to SolidWorks 2001 Useful for creating N sided patches (3 or 5 or more sides) n Only one of it’s kind in the industry n Pros: – Especially useful for “Capping”, complex surface patches and for repairing import surfaces. – Curve Continuous (C2) matching (New for 2007) – Fix Up Boundary does not require closed or contiguous boundary (new for 2007) n Cons: – Can only use one or two Constraint curves – In some cases needs edge matching to control surface Fill Feature First Fill Feature (import repair) Fill Example Samsung Syncmaster 700 Optimized vs. non-Optimized Freeform Feature Background n Introduced in SolidWorks 2007 to answer customer’s need to have push-pull ability in SolidWorks. n Dynamically pull on surfaces to deform them n Pros: – No need to predefine section or guide curves – Unlike competition, can place control points anywhere on the surface or face not just an evenly spaced grid of points. Only one of it’s kind in the industry – Especially useful for highly organic shapes – Can move face boundaries and re-heal automatically. n Cons: – Currently can only do four-side surfaces or faces Freeform Introduction Workflow – Face Settings – identify surface or face to modify. Optionally assign symmetry (if applicable) – Control Curves – create control curves or optionally assign matching conditions on boundary tags in SolidWorks Window – Control Points – create Control points on previous assigned curve or on existing boundaries if they are moveable. – Display – optionally control visualization of mesh, curvature etc. Freeform Introduction Boundary Conditions § Contact – Face maintains contact but direction at edge can be changed. Freeform Introduction Boundary Conditions 2. Tangent – Face maintains tangency Freeform Introduction Boundary Conditions 3. Curvature Freeform Introduction Boundary Conditions 4. Moveable verses Moveable/Tangent Freeform Introduction n Triad Control § Global – Triad aligns with Global vectors § Surface – Triad aligns normal to surface (before move) curve § Curve – Triad aligns with normal of curve (before move) FreeForm Introduction n To Display Curvature for Control Curves – RMB on the curve and Click “Show Curvature. FreeForm Introduction n To show curvature on the mesh U/V’s – use the options in the property manager First Freeform example Second Freeform example More Questions n Visit the SolidWorks website at www.solidworks.com to learn more about SolidWorks and its product offerings. n Contact me at firstname.lastname@example.org n Contact your local SolidWorks reseller for information on pricing and training. To find a reseller in your area call: 800-693-9000 (US and Canada) or +1-978-371- 5011 (Outside the US and Canada). n Watch your email for news about future 3D CAD and analysis online seminars, or visit our website at: www.solidworks.com/onlineseminars
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