Chapter 7 Advanced Part Modeling Techniques
Jan 04, 2016
Chapter 7Advanced Part Modeling
Techniques
• 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– Use Auto Limits to alert you when a part or
assembly exceeds a target range for a specific property
Chapter 7 - Objectives
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
Part Split and Face Split• Part Split and Face Split
– Method• Split Part
– Remove Material
• Split Face
– Split dialog box • All• Select• Faces to Split• Split Tool
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
Part Materials• Part Materials
– Physical tab or Properties dialog box– Mass is calculated from material– Part color set to As Material
• Color equals material
Override Mass & Volume Properties• Mass and volume values
– Default & Overridden– Copy information into another application
Auto Limits• Design limits
– Dimensional– Physical
properties– Settings
Auto Limits• Boundaries
– Lower– Upper– Visibility
Applying Your Skills
• Skill Exercise 7-1
Project Exercise – Chapter 7Advanced Part Modeling Techniques
• In Appendix A
Checking Your Skills1. True_ False_ When creating a single rib or a web feature, you can only select a closed
profile.2. True_ False_ Both the Extrude and Revolve tool can use the minimum or maximum
extrusion solutions.3. True_ False_ You can only place embossed text on a planar face.4. True_ False_ A sweep feature requires three unconsumed sketches.5. True_ False_ You can create a 3D curve with a combination of both 2D and 3D curves.6. Explain how to create a 3D path using geometry that intersects with a part.7. True_ False_ The easiest way to create a helical feature is to create a 3D path and then
sweep a profile along this path.8. True_ False_ You can control the twisting of profiles in a loft by defining point sets.9. Explain how to save both halves of a part after splitting it.10. True_ False_ You can copy features between parts using the Copy Feature tool on the
Part Features panel bar or toolbar.11. Explain the difference between suppressing and deleting a feature.12. True_ False_ After mirroring a feature, the mirrored feature is independent from the
parent feature. If the parent feature changes, the mirrored feature will not reflect this change.
13. Explain why you would want to override a part’s mass and volume properties.14. True_ False_ After changing a part’s physical material properties, the part’s color in the
graphics window will change to match the material.15. True_ False_ A derived part cannot be scaled.