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Chapter 7 Advanced Part Modeling Techniques Chapter 7 - Objectives • After completing this chapter, you will be able to perform the following: – Extrude an open profile – Create ribs, webs, and rib networks – Emboss text and profiles – Create sweep features – Create coil features – Create loft features – Split a part or split faces of a part – Bend a part Chapter 7 - Objectives • After completing this chapter, you will be able to perform the following: – Copy features within a part – Reorder part features – Mirror model features – Suppress features of a part – Create a derived part based on another part or an assembly – Shrinkwrap an assembly – Create plastic and cast features Using Open Profiles • Using Open Profiles – Sketch that does not form a closed area – Extrude tool only – Extrude bi-directionally • positive or negative direction, fill direction – Match Shape Rib and Web Features • Rib and Web Features – Used to reinforce or strengthen features • Additional support and minimal weight are required – mold and cast parts – Ribs, webs, and rib networks – Single, open, unconsumed profile – Taper Rib and Web Features • Rib and Web Features – Rib dialog box – Shape • Profile • Direction – Thickness • Edit Box • Flip Buttons – Extents • To Next • Finite • Extend Profile – Extend Profile – Taper Rib and Web Features • Creating Rib and Web • Rib Networks – Use multiple intersecting or nonintersecting sketch objects – Thickness is applied to all objects • Rib Network as a – Profile – Ribs – Webs Exercise 7-1 • Creating Ribs and Webs Emboss Text and Closed Profiles • Emboss Text / Closed profile – Embossed (raised) – Engraved (cut) • Shape or Text • Geometry Text • On a plane or a curved face – Step 1 - Creating Text – Step 2 - Emboss Text Exercise 7-2 • Creating Text and Emboss Features Sweep Features • Sweep Features – Requires two unconsumed sketches – Sweep dialog box • • • • Profile Path Operation buttons Solid / Surface • Taper • Type • Orientation Sweep Features • Profile • Path • Orientation – Path – Profile Sweep Features • Type - Path & Guide Rail • Profile Scaling –X&Y –X – None Sweep Features • Type - Path & Guide Surface – Path – Profile – Guide Surface Exercise 7-3 • Creating Sweep Features 3D Sketching • Defining a 3D path – – – – Lip or routing Work points Model edges/vertices 3D Sketch Environment • 2D & 3D curves Sweep Features • 3D Sketching – 3D Path From Existing Geometry • Define path – Use existing edges • Include Existing Geometry – Projecting part edges, vertices, and geometry 3D Sketching • 3D Sketch From Intersection Geometry – Defined by a combination • • • • Planar or nonplanar part face Surface face or quilt Objects Work plane 3D Sketching • Project to Surface – – – – Project Along Vector Project to Closest Point Wrap to Surface Break Link 3D Sketching • Constructed Paths – Connecting • Work points • 3D line – Auto-Bend • Radius Sweep Features • 3D Sketching – – – – – Work Points Grounded Work Points Constraints 3D Lines and Splines Precise Input Exercise 7-4 • 3D Sketch – Sweep Features • Coil Features Coil Features • Helical, springs or coil shapes –Coil Shape • • • • • Profile Axis Flip Rotation Operation –Coil Size • • • • • Type Pitch Revolution Height Taper Coil Features • Coil Features – Coil Ends • • • • Start End Transition Angle Flat Angle – Using base & secondary feature Loft Features • Loft Features – Blends a shape between two or more sections – Area Loft – Complex shapes • Plastic or molded parts – Sections – Rails – Center Line – Points – Curves Loft Features •Curves –Sections –Rails –Center Line –Output –Operation –Closed Loop –Merge tangent Faces –Area Loft Features •Conditions –Condition Boundaries Sketches • Free Condition • Direction Condition –Condition Boundaries Face Loop • Smooth (G2) Condition –Angle –Weight Loft Features • Loft Features – Transition • Point Set • Map Point • Position Exercise 7-5 • Creating Loft Features Multi-Body Parts • Create a solid body in a part file • Derive a solid body into a part file • Split Part into solid bodies Multi-Body Parts • Edit solid bodies – Move bodies – Combine Multi-Body Parts • Export solid body – Make Part – Make Components Split a Solid, Part or Face • Part Split and Face Split – Method • Split Face • Trim Part – Remove Material • Split Solid – Split dialog box • • • • Split Tool Faces All Select Exercise 7-6 • Splitting a Part Bend Part • Bend a part – A bend line – Radius + Angle – Radius + Arc Length – Arc Length = Angle Copying Features • Browser or Feature Priority – – – – – Dependent Independent Paste Features Parameters Pick Sketch Plane Mirroring Features • Mirroring Features – Features • Dependent on the parent feature • Mirror Plane • Creation Method • Change or update – Mirror Entire Solid Suppressing Features • Suppressing Features – – – – – Temporarily turn off display Simplify parts Increases system performance Unsuppress Parent – child relationships Conditionally Suppress Features • Feature Properties • Parameter Value – If statement Reordering Features • Reordering Features – Browser • Drag horizontal line Feature Rollback • Feature Rollback – – – – Roll back the design to an earlier state Then place new features Reorder Delete all features below EOP Derived Parts • In a Part (IPT) file • Options – – – – – – – – – Body Work Surface Sketches 3D Sketches Work geometry Surfaces Exported Parameters iMates Options • Operations – Mixed – Plus – Exclude • Scales Factor • Mirror Part Derived Assemblies • In a Part (IPT) file • Operations – – – – – Combination Plus Exclude Minus Bounding Box • Keeps seems between planar faces • Reduced Memory Mode • Update • Break Link Exercise 7-7 • Creating a Derived Part Shrinkwrap • Reduce detail – Protect intellectual property – Reduce file size • Create a substitute part for use with alternative representations • Create simplified data for complex purchased assemblies Shrinkwrap • Remove detail by setting – Visibility – By Size – Holes patching – Object type Exercise 7-8 • Shrinkwrap Plastic and Cast Features • Silhouette Curves—Parting Line – Create a curve at the outermost boundary of the selected faces – Select a direction – Then create a surface that will be used as a split tool Plastic and Cast Features • Grills – Create a grill feature from a simplified sketch – Create a sketch – Create feature - fill in information in dialog box Plastic and Cast Features • Bosses – Creates a boss feature to hold a fastener – Place sketch point(s) or work point(s) – Create feature - fill in information in dialog box Plastic and Cast Features • Rests – Create flat area the goes partially inside and outside a part – Create a sketch – Create feature - fill in information in dialog box Plastic and Cast Features • Snap Fit – Creates a mechanism that is used to hold two parts together – Place sketch point(s) or work point(s) – Create feature - fill in information in dialog box Plastic and Cast Features • Rule Fillet – Creates a fillet based on a set of rules that dictate when edges touch certain faces or features, fillets will automatically be created – Rules • All Edges, Against Part, Against Features or Free Edges Plastic and Cast Features • Lip – Creates lips and grooves that join two parts together at their parting lines – Lips add material and grooves remove material – Create feature - fill in information in dialog box Exercise 7-9 • Plastic Part Part Materials • Part Materials – Physical tab or Properties dialog box – Mass is calculated from material – Part color set to As Material • Color equals As Material Override Mass & Volume Properties • Mass and volume values – Default & Overridden – Copy information into another application Applying Your Skills • Skill Exercise 7-1 Checking Your Skills 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. True_ False_ When creating a single rib or a web feature, you can only select a closed profile. True_ False_ Both the Extrude and Revolve command can use the minimum or maximum extrusion solutions option. True_ False_ You can only place embossed text on a planar face. True_ False_ A sweep feature requires three unconsumed sketches. True_ False_ You can create a 3D curve with a combination of both 2D and 3D curves. Explain how to create a 3D path using geometry that intersects with a part. True_ False_ The easiest way to create a helical feature is to manually create a 3D path and then sweep a profile along this path. True_ False_ You can control the twisting of profiles in a loft by defining point sets. Explain how to split a part into two solid bodies and then save them to their own part file. True _ False _ You can copy features between parts using the Copy Feature command on the Modify panel. Explain the difference between suppressing and deleting a feature. True _ False _ After mirroring a feature, the mirrored feature is always independent from the parent feature. If the parent feature changes, the mirrored feature will NOT reflect this change. True _ False _ A derived part cannot be scaled. True _ False _ When creating a lip feature with the Lip command, you must first create a 3D path. Explain why you would want to override a part’s mass and volume properties.