Parametric Modeling

© 2011 Project Lead The Way, Inc.Design and Modeling

3D Modeling Steps - Sketch

Step 1 Sketch Geometry

Sketch Geometry

Line Sketch Tool

3D Modeling Steps - Constrain

Step 1 Sketch Geometry

Step 2 Constrain Geometry

A. Apply Geometric Constraints

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 view

To this view

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

C. 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 Environment

C. Preview the Extrusion

D. Apply Extrusion

Color ToolChoose color here

Color ToolChoose 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 Add Sketch Plane to surface on which

geometry will be sketched

Create New Sketch Plane

Sketch plane selected with left mouse click

Sketch Button

Steps for Adding a Feature

Step 1 Add Sketch Plane

Step 2 Sketch Geometry

Sketch Geometry

Normal View selected with View Face tool

or by clicking on front of View Cube

Add line to Front face

Steps for Adding a Feature

Step 1 Add Sketch Plane

Step 2 Sketch Geometry

Step 3 Constrain Geometry

Constrain Geometry

Steps for Adding a Feature

Step 1 Add Sketch Plane

Step 2 Sketch Geometry

Step 3 Constrain Geometry

Step 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 FeatureStep 4

Adding a Feature to a Solid Model

Let’s see it again…

…this time we will create a hole feature.

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 on 3D Model tab

Completed Hole Feature

Model with Hole Feature

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 FeatureStep 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 should

be 5 in. long, not

3 in. How can we

fix this without

redrawing 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