Chapter 8 Advanced Part Modeling Techniques

After completing this chapter, you will be able to – Extrude an open profile – Create ribs, webs, and rib networks – Emboss text and profiles – Create sweep features – Create coil features – Create loft features – Use surfaces to create solids – Split a part or split faces of a part – Copy features within a part Chapter 8 - Objectives

After completing this chapter, you will be able to – 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 8 – Objectives continued

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 8-1 Creating Ribs and Webs

Emboss Text and Closed Profiles Emboss Text / Closed profile –Embossed (raised) –Engraved (cut) Shape or Text On a plane or a curved face –Step 1 - Creating Text –Step 2 - Emboss Text

Exercise 8-2 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 8-3 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 8-4 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 –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

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 8-5 Creating Loft Features

Surface Modeling Output Surface model (note part icon) Import Surfaces –IGES Fillet & Chamfer

Surface Modeling Tools –Thicken/Offset –Replace Face –Sculpt –Delete Face –Boundary Patch –Trim Surface –Extend Surface –Stitch Surface Surface Modeling - Overview

Part Split and Face Split –Method Split Part –remove material Split Face –Split dialog box All Select Faces to Split Split Tool

Exercise 8-6 Splitting a Part

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 Update Break Link

Exercise 8-7 Creating a Derived Part

Center of Gravity –Part & Assembly –Representation X-,Y-, and Z-axis arrows –Mass properties –Numeric value –Values are relative to the origin –Colorless - update

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

Summary ToDo This To extrude an Open ProfileClick the Extrude tool, click the Open Profile, and click on the side of the part that will be filled in. To create a rib or webClick the Rib tool and select an open profile. Place text on a sketchClick the Create Text tool on the 2D Sketch Panel Bar. Emboss textClick the Emboss tool on the Part Features Panel Bar. Create a sweep featureClick the Sweep tool on the Part Features Panel Bar. Create a coil featureClick the Coil tool on the Part Features Panel Bar. Create a loft featureClick the Loft tool on the Part Features Panel Bar. Create surfacesUse Inventor tools to create and edit surfaces. Split a face or partClick the Split tool on the Part Features Panel Bar. Copy a featureRight-click on a feature’s name in the Browser, click Copy from the menu, and then Paste the feature.

Summary ToDo This Reorder a featureClick on the feature’s name in the Browser and, with the left mouse button depressed, drag the feature to the desired location. Mirror a featureClick the Mirror Feature tool from the Part Features Panel Bar. Suppress a featureRight-click on the feature’s name in the Browser and select Suppress Features on the menu. Rollback featuresClick the End of Part marker in the Browser and, with the left mouse button depressed, drag the End of Part marker to the new location. Adjust a file’s propertiesClick the iProperties option on the File menu. View the center of gravity of a part or assembly Click Center of Gravity on the View menu. Set AutoLimitsClick AutoLimits from the Panel bar

Project Exercise Chapter 8

Applying Your Skills Skill Exercise 8-1