UG6.0_直接建模教程

© 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Direct Modeling NX 6 Beta Presentation Page 2 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Definition of Direct Modeling Modification at any moment in time without regard for how and where the model was constructed Modification at any moment in time without regard for how and where the model was constructed Page 3 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Workflows Ø Initial concept design Ø End of cycle companion to feature modeling Ø Modification & reuse* of geometry in a multi-CAD environment Ø Comprehensive design change within any workflow End of cycle companion to feature modeling * = Reuse of JT w/XT B-REP, CATIA, Pro/E, SolidWorks, OSD data Page 4 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Core geometry technology Three core technologies underlie all Direct Modeling geometry operations ØChange (Move / Offset / Resize) ØDelete (Replace / Delete) ØRe-blend DMXCh an ge Delete Re-blend The Geometry Triangle Page 5 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Case coverage Ø Comprehensive Ø Reliable Ø Move … up to 50% additional cases supported versus NX 5 Ø Re-blend … up to 60% additional cases supported versus NX 5 Page 6 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Concepts 1. Advanced face selection 2. Geometric transformations 3. Dimensions 4. Reuse 5. Direct Modeling Mode 6. Direct shelling 7. Edit section 8. Common Blocks Page 7 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 1. Advanced face selection Ø Feature recognition Ø Face recognition Ø Region recognition Ø Suggestive selection Page 8 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Feature recognition Ø Selection of a topology lump without regard for how the model was constructed Ø Boss or Pocket, Slot, Rib Slot Rib Boss Page 9 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Feature recognition continued Ø Option to include neighbor blends Include Exclude Page 10 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Feature recognition continued Ø Merged rib faces (very common condition) – New to NX 6! Page 11 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Face recognition Ø Recognize geometric conditions without regard for how the model was constructed Ø Face finder – Coaxial, Tangent, Coplanar, Equal Radius, Symmetric Click face Find equal diameterFind coaxial Move Recursive coaxial Page 12 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Face recognition continued Ø Maintain tangent conditions without regard for how the model was constructed Tangent Offset Move Tangent Page 13 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Face recognition continued Ø Geometry index for fast find – Distinguish near from far to alleviate over-select Search 2300 Find 18 Page 14 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Region recognition Ø Select a region face Ø Combination of faces and curves Ø No requirement to trim curves or subdivide faces Region Face Extrude Curves Page 15 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Suggestive selection Ø Alternate selection methods offered directly under cursor Ø No need to plan ahead Ø Able to change methods iteratively to arrive at best selection Ø Uses Office 2007 mini-bar concept Page 16 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 2. Geometric condition commands Applies geometric conditions to geometry ØMake coaxial ØMake coplanar ØMake tangent ØMake parallel ØMake perpendicular ØMake symmetric Page 17 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 3. Dimensions Applies a dimension to change the model Ø Linear Ø Angular Ø Radial Page 18 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 4. Reuse Ø Design change involves more than changing numbers Ø Sometimes you need to take it apart, change it, and put it back together without regard for how the model was constructed Page 19 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 4. Reuse continued Ø Functional design change with or without features Ø Reuse of faces Ø Copy Face: copy face set (scrap) for reuse Ø “Add” and “subtract” attributes on scrap for subsequent paste Ø Cut Face: copy, delete original, and heal Ø Paste Face: attach scrap to body Ø Extension of faces based on “add” and “subtract” attributes Ø Mirror Face: combination of copy and paste Ø Copy to clipboard: copy face set as non- associative sheet body, then paste from clipboard Page 20 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 5. Direct Modeling Mode Ø A mode of working with NX where linear history does not accumulate Ø No replay Ø No Edit with Rollback Ø Extrude just adds a body Ø Blend just modifies a body Ø A curve is just a curve Ø Design change with direct modeling command set Page 21 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Procedural Features Ø History-free does not mean feature- free Ø Feature behavior is desirable even in absence of history Ø Edit properties via dialog – “edit like create” Ø Change location via direct modeling ØHole, Thread Edge Blend, Chamfer Ø A procedural feature is always a leaf Page 22 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 6. Direct shelling Ø Shell behavior without a shell feature Ø Walls are maintained during DMX commands Ø Move Face, Offset Region, Make Coplanar, etc Ø Explicit command set Ø Shell Body: performs the initial shell Ø Shell Face: adds faces to an existing shell Ø Change Shell Thickness Page 23 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 7. Edit section Ø Intersect model with plane Ø Intersection is bi-directional with model Ø Edit curves to change the model Ø Exclusive to no-history mode Page 24 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software 8. Common blocks Ø Face Finder block Ø Suggestive selection service Ø Motion block Ø OrientXpress block Face Finder block Motion Block OrientXpress Page 25 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software Motion block Ø Dimensional and geometric transforms Motion Options NX 5 NX 6 Distance ü ü Angle ü ü Point to Point ü ü Align Axis to Vector ü ü Distance between Points ü Radial Distance ü Rotate by 3 Points ü Protractor ü Radial Distance Page 26 © 2007. Siemens Product Lifecycle Management Software Inc. All rights reserved Siemens PLM Software OrientXpress Ø Set axis or plane via scene control Ø Heads-up interaction avoids visiting the dialog Ø Reference coordinate system Ø Absolute, WCS, CSYS object Ø Work part or displayed part Ø Service for reuse in commands or blocks Ø Linear Dimension command, Motion block