Chapter 7 Advanced 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 –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 –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 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 –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 Helical, springs or coil shapes –Coil Shape Profile Axis Flip Rotation Operation –Coil Size Type Pitch Revolution Height Taper

Coil Features –Coil Ends Start End Transition Angle Flat Angle –Using base & secondary feature

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 –Transition Point Set Map Point Position

Exercise 7-5 Creating Loft Features

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 –Features dependent on the parent feature Mirror Plane Creation Method Change or update –Mirror Entire Solid

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 –Browser Drag horizontal line

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 –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 7 Advanced Part Modeling Techniques In Appendix A

Checking Your Skills 1.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.