autocad 2d_i module 6: sectional views. module objectives 1.differentiate the different types of...

AutoCAD 2D_I

Module 6: Sectional Views

Module Objectives

1. Differentiate the different types of sectional views.

2. Create sectional views drawing from a given isometric or oblique drawings.

3. Define hatching and explains it’s function

Introduction to Sectional Views

Introduction to Sectional Views

A sectional view is that view seen beyond an imaginary plane passing through an object at right angles to the direction of sight.

Sectional views are used to show the interior construction or details of hidden features that can not be shown clearly by outside views.

Introduction to Sectional Views

The cutting plane on which a section has been taken is indicated by a heavy dash line. Arrow heads at the ends of the cutting plane lines are used to indicate the direction in which the sections are viewed.

See the following figures

Types of sectional views

Types of sectional views

Half Section

Rib and Web Sections

Full Section

Non-sectioned parts

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Hatching

Hatching

Hatching lines are thin lines and should preferably be inclining at 45 degrees. They should be evenly spaced.

Hatching

If there are two or more adjacent sectioned parts, the hatching lines should either be of different spacing or different direction. See the following figures.However, hatching pattern should be the same for separate areas of a single object.

Examples on Sectioning

Examples on Sectioning

Example 1

Example 4Example 3

Example 2

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Worksheets and class Activities

Worksheets and Homework

Worksheet 1

HomeworkWorksheet 3

Worksheet 2

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Worksheet 2

Match the correct section view with the corresponding drawing. Write the correct sectional view letter beside the drawing number in the space provided.

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Worksheet 3

Use an A3 size drawing sheet to redraw the following views:1. The top view.2. The complete sectional front view at A-A.3. The side view.

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Homework

Using the THIRD angle projection, draw the following ORTHOGRAPHICviews of component shown below.1. A complete sectional side view from arrow S.2. A front view from arrow F.3. A plan view from arrow P

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The End