Parametric Modeling

3D Modeling Steps - Sketch

Step 1 Sketch Geometry(use the “line” tool today)

You are making a four-sided shapethat is not necessarily a square at first.Next, you will usethe “parallel” and “perpendicular”GEOMETRIC CONSTRAINT TOOLSto make it a rectangle.

Sketch Geometry

Line Sketch Tool

3D Modeling Steps - Constrain

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints(try perpendicular and parallel)

Geometric Constraints Applied First

Geometric Constraint Tools

What do you think we do next?

3D Modeling Steps - Constrain

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints B. Apply Dimension Constraints

Dimension Constraints Applied Second

Dimension Constraint Tool

The geometry that has been constrained is a profile of an object.

3D Modeling Steps - Extrude

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints B. Apply Dimension Constraints

Step 3 Extrude the Object from the Profile A. Change View to Isometric (Home)

Profile Changed to Isometric

Right mouse click, select Home View or use shortcut key F6 or Click on Home icon by View Cube

3D Modeling Steps - Extrude

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints B. Apply Dimension Constraints

Step 3 Extrude the Object from the Profile A. Change View to Isometric (Home)

B. Switch to Features Environment

Features Environment

Select Finish Sketch to switch to Features

Environment

From this

To this

3D Modeling Steps - Extrude

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints B. Apply Dimension Constraints

Step 3 Extrude the Object from the Profile A. Change View to Isometric (Home)

B. Switch to Features EnvironmentC. Preview the Extrusion

Extrusion Parameters Set

Extrusion Dialogue Box

Select Extrude from Create panel

3D Modeling Steps - Extrude

Step 1 Sketch Geometry Step 2 Constrain Geometry

A. Apply Geometric Constraints B. Apply Dimension Constraints

Step 3 Extrude the Object from the Profile A. Change View to Isometric (Home)

B. Switch to Features EnvironmentC. Preview the ExtrusionD. Apply Extrusion

Profile Extruded

Choose color here

Summary

Step 1

Extrude

Constrain Geometry

Sketch

Step 3

Step 2

Steps in Parametric Modeling

Part 2

Parametric Modeling

Adding a Feature to a Solid Model

Step 1: As we have practiced, we can adda Sketch Plane to the surfaceon which some additionalgeometry will be sketchedby clicking on that surface andchoosing “new sketch”

Create New Sketch Plane

Sketch plane selected with left mouse click

Sketch Button

Steps for Adding a Feature

Step 1: Add Sketch PlaneStep 2: Sketch Geometry…

We can use the line tool againto draw the desired shape.

View Face

Sketch Geometry

Normal View selected with View Face tool or by clicking on front of View Cube

Steps for Adding a Feature

Step 1: Add Sketch PlaneStep 2: Sketch GeometryStep 3: Constrain Geometry…

We can dimension from anylocation on any object line (a POINT) to another location (different point) on anotherobject line

Constrain Geometry

Steps for Adding a Feature

Step 1: Add Sketch Plane Step 2: Sketch GeometryStep 3: Constrain GeometryStep 4: Create Feature

Feature Parameters Set

Isometric (Home) view selected, Extrusion dialog box set

Choose cut operation here

Feature Created

Summary

Step 1 Create Sketch Plane

Constrain

Sketch Geometry

Step 3

Step 2

Create Feature Step 4

Adding a Feature to a Solid Model

Let’s see it again…This time we will create a hole feature.

We will use a POINT (or center point) as an anchor for the hole we will draw.

Rotate Model

Dynamic Rotation

View Cube

Rotate model with Dynamic Rotation tool or View Cube

Step 1 Create New Sketch Plane

Step 2 Sketch Geometry

This tool used to…

…create center point geometry

Step 3 Constrain

Step 4 Create Hole Feature

Hole Feature selected from Modify panel

Completed Hole Feature

Model with Hole Feature (skip this step?)

Model in Isometric view with hidden edges displayed

Hidden Edge Display

Summary

Step 1 Create Sketch Plane

Constrain

Sketch Geometry

Step 3

Step 2

Create Feature Step 4

Adding a Feature to a Solid Model

Why Parametric Modeling?

Determine the shape and size of the geometry at any time during the design process.

This part shouldbe 5 in. long, not3 in. How can wefix this withoutredrawing it?

Why Parametric Modeling?

Benefits– Shape before size– Geometric and dimension constraints used to

capture design intent– All files can be quickly updated– Existing data can be used for new designs– Quick design turn around

Show your teacher…

• Show your teacher your final model

• You may be asked to demonstrate something using Inventor

• Complete your conclusion questions

• Put your complete assignment in the correct place before you leave class and ask for permission to begin the SketchPlaneCube assignment