Using the Extrude Tool (Extrusion Feature)

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PLATFORM: AUTODESK INVENTOR PROFESSIONAL 2011/2012/2013

LEVEL OF DIFFICULTY: BEGINNERS

AUTHOR: NDIANABASI UDONKANG

FOLLOW ME ON: Twitter | Facebook | LinkedIn

This is a continuation of the series of lessons for new Inventor Users. Check out this blog's table-of-content page for more topics in this series

TOPIC: USING THE EXTRUDE TOOL (EXTRUSION FEATURE)

BEFORE YOU BEGIN

1. Download the dataset. The dataset files were created with Inventor 2011 to ensure compatibility with newer versions of Inventor.
2. Extract the content using any unzipping utility.
3. Save the files to a project folder of an existing Inventor project. Set the project active. Learn more about Inventor Projects and Project Files.

INTRODUCTION

Extrusion is simply defined as the process of giving a 2D sketch a perpendicular height. That means converting the 2D sketch to a 3D entity; if your sketch was drawn on the X-Y plane, then your extrusion will proceed in the Z direction (which is perpendicular to the X-Y plane). You could also say that: extrusion is the process or technique of adding a height to a 2D sketch, thereby, effectively creating a 3D model.

In Autodesk Inventor, the extrusion process creates extruded features, and is carried out through the Extrude tool. The table below shows examples of 2D sketches and the resulting models after an extrusion operation.

Table 1: A table Showing Different Sketches and Resulting Extrusion Features

#	Sketch Geometry	Sketch Image	Resulting Extrusion Feature
1.	Circle		Cylinder
2.	Rectangle
3.	Other Geometry
4.	Any open sketch		Note: When an open profile is extruded, the result is always a surface.

You might need to make references to the following lessons in order to understand this lesson:

Understanding Constraints in Autodesk Inventor - Part 1

Understanding Constraints in Autodesk Inventor - Part 2

Understand and Using Sketch Linetypes and Geometry in Autodesk Inventor

Types of Features in Autodesk Inventor

OBJECTIVES

At the end of this lesson, the reader should be able:

1. Explain the process of extrusion.
2. Understand the principle of the Extrusion Feature in Autodesk Inventor.
3. Use the Extrude tool for creating an Extrusion Feature.
4. Understand the uses of the Join, Cut, and Intersect options of the Extrude dialog box.

LOCATING THE EXTRUDE TOOL

The Extrude tool could be found on:

1. RIBBON: Model tab > Create panel > Extrude
   
   
   
   
2. SHORTCUT: When you are in the Sketch environment and are through with the necessary sketches, simply press "E" on your keyboard to launch the Extrude tool.

BASE SKETCHES & FEATURES

A Base Sketch is the first sketch found on your Model Browser, irrespective of its name. It is the first sketch that was created in the model.

A Base Feature is the first feature created from the base sketch. The base feature is usually a sketched feature (i.e. Extruded, Revolved, Swept, or Lofted features).

CREATING EXTRUDED FEATURES

In this lesson, it is assumed that you are familiar with Inventor's Sketch environment. If you are new to Inventor's Sketch environment, you might have to read previous lessons in this blog. Check out the Table of Contents. The tutorial was created with Inventor 2011.

You might want to read the tutorial on "Boolean Operations in Autodesk Inventor."

In this section, we are going to create a Front Frame part for an infant scooter.

BASE FEATURE

1. Open the dataset file Front_Frame_Extrusion_Lesson.ipt. The file was created with Inventor 2011 to ensure compatilibility with newer versions of Inventor.
2. Press E to launch the Extrude tool. Alternatively, go to Model tab > Create panel > Extrude tool.
3. Click on the Left and Right profiles. Set the extrusion distance to 60mm, and click OK to finish.

This is the base feature.

SECOND SKETCH AND FEATURE

Now, we are going to create a second sketch and second feature.

1. Click on the right-hand side of the base feature as shown in Figure 3. Click Create Sketch on the mini-toolbar to create a new sketch using the selected planar face.
2. Press Page Up and click on the planar face shown in Figure 3 to Look At the face.
3. Create the geometry as shown in Figure 4.
4. Launch Project Geometry: Sketch tab > Draw panel > Project Geometry.
5. Project the edges of the face next the face on which the current sketch is based. Refer to Figures 5 and 6 for guidance.
6. Next we convert all the projected (or reference geometry) to construction geometry. Select all the projected geometry.
7. Go to Sketch tab > Format panel and click Construction. See Figure 7.
8. Apply geometric constraints as shown in Figure 8. The completed sketch should be as shown in Figure 9.







9. Now, we are through with our sketch. Let's create the extrusion. Press E to launch the Extrude tool.
10. On the Extrude dialog, set Extents to All. Also set the Boolean operation to Intersect.
11. Click OK to finish the extrusion. The resulting solid is shown in Figure 10.

In the next lesson, we are going to explore the Extents options found on the Extrude dialog box.

I hope you learnt a lot from this lesson. If you have any questions, please drop a comment, and I will answer ASAP. Thank you.

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TYPES OF FEATURES IN AUTODESK INVENTOR

PLATFORM: AUTODESK INVENTOR PROFESSIONAL 2012

LEVEL OF DIFFICULTY: BEGINNERS

AUTHOR: NDIANABASI UDONKANG

FOLLOW ME ON: Twitter | Facebook

This is a continuation of the series of lessons for new Inventor Users. Check out this blog's table-of-content page for more topics in this series.

TOPIC: TYPES OF FEATURES IN AUTODESK INVENTOR

INTRODUCTION

Autodesk Inventor is a feature-based parametric modelling application. Inventor is said to be feature based because each modification that is made to a component is regarded as a feature. So in a design workflow for a component, you would most likely make use of extrusion, swept, lofted, revolved, threaded, hole, rib, fillet, shell, and chamfer features . If you are also experienced with surface modelling, you would likely use features like sculpt, thicken, patch, and trim. Learn more about Inventor in the Lesson: What is Inventor?

There are three types of features in Inventor, namely:

1. Sketched Features,
2. Placed Features, and
3. Work Features.

OBJECTIVES

At the end of this lesson, the reader should be able to:

1. Explain the following: sketched features, placed features, and work features.
2. Differentiate between sketched featues, placed features, and work features.

SKETCHED FEATURES

Sketched Features are those features that are built, or constructed from 2D or 3D sketches. A sketched feature is always the starting feature when you want begin a new part. The first sketched feature that is added to a part is called the "base feature." Sketched features can be used during standard part modelling, surface modelling, and plastic part modelling. The table below shows some examples of sketched features.

#	Type of Modelling	Examples of Sketched Features
1.	Standard part modelling	Extrusion, Revolution, Sweep, Loft, Emboss, Rib, and Coil.
2.	Surface modelling	Extrusionsrf, Revolutionsrf, Sweepsrf, and Loftsrf.
3.	Plastic part modelling	Grill, and Rest.

Sketched features always require visible sketches. Visible sketches are those sketches that can be seen on the Graphics Area. They should not be consumed by other features. If you have a sketch that is consumed by another feature, simply share the sketch to make it visible and available for use by other sketched features. Consumed sketches are those sketches that have been used to create sketched features. A consumed sketch is always located under the sketch feature in the model browser.

Sketched features can be located on the Create and Plastic Parts panel of the Model tab of a part environment.

PLACED FEATURES

Placed features are those features that do not strictly require sketches for their creation. They are mostly used for modifying (or adding features) to an existing the model - the reason they are called "Modifying Tools." Examples of placed features are Hole, Fillet, Chamfer, Shell, Draft, Thread, Split, and Combine features for modifying standard part models, and Thicken/Offset, Stitch, Sculpt, Patch, and Trim for modifying surface models.

Placed features are located on the Modify and Surface panels of the Model tab of a part environment.

WORK FEATURES

Work features are modeling aids. From the first sketch to the last feature of your model, work features are used to aid the modeling process. And as the design becomes more complex, you will need the help of work features to find your way out! These work features can be used for creating sketches, for constraining of components in the assembly environment, for feature termination (in both part and assembly designs), and for creating other work features.

There are three types of work features in Autodesk Inventor, namely:

1. Work planes;
2. Work axes; and
3. Work points.

There are about four lessons dedicated to work features. Please check them out below:

Using and Understanding Work Planes in Autodesk Inventor

Using and Understanding Work Axes in Autodesk Inventor

Using and Understanding Work Points in Autodesk Inventor

Using and Understanding Grounded Work Point in Autodesk Inventor

 

I hope you learnt a lot from this lesson. If you have any questions, please drop a comment, and I will answer ASAP. Thank you.

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