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– Shrinkwrap an assembly– Create plastic and cast features

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

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 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 command can use the minimum or maximum

extrusion solutions option.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 manually 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 split a part into two solid bodies and then save them to their own part file.10. True _ False _ You can copy features between parts using the Copy Feature command on

the Modify panel.11. Explain the difference between suppressing and deleting a feature.12. 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.

13. True _ False _ A derived part cannot be scaled.14. True _ False _ When creating a lip feature with the Lip command, you must first create a

3D path.15. Explain why you would want to override a part’s mass and volume properties.