Contents – Machine Drawing with AutoCAD

Contents

Preface

Acknowledgements

Introduction

History of Engineering Drawing

Change in Drafting Environment

Cad and Computer-Aided Drafting

Orthographic Projection

Perspective Projection

Parallel Projection

Orthogonal Projection

Angles of Projections

Drawing Layout

Drawing Convention of Orthographic Views—Hidden and Center Line

Conversion of Pictorial Views into Orthographic Views

Other Types of Projections

Principles of Isometric Projection

Oblique Projection

Exercise

Computer-Aided Drafting Packages and AutoCAD

Working Interface of AutoCAD

Drawing Limits

Creating 2-D Drawings in AutoCAD

AutoCAD Commands

Creating Text in AutoCAD

Height of Text and Scale Factor

Editing Single Line Text

Editing Commands in AutoCAD

Clean-up Commands—Trim, Extend, Break, Fillet, Chamfer

Changing Object Properties from Command Line

Scale

Object Snap Mode

Display Control in AutoCAD

Layer

Creating an AutoCAD Drawing—Illustrative Example

Exercise

Dimensioning in AutoCAD

General Concepts and Standard Practices

Components of Dimensions Label

Types of Dimensions

Standard Practice in Dimensioning

Types of Dimensioning

Dimensions in AutoCAD

Toolbar and Commands

Editing Dimensions in AutoCAD

Illustrative Example of Dimensioning

Exercise

Section and Sectional Views

Cutting Plane Lines

Full Section

Half Section

Special Section

Local or Partial Section

Removed Section

Offset Section

Omission of Section

Hatching or Section Lines

Sectional View and AutoCAD

Illustrative Problems

Exercise

Thread and Fasteners

Thread Terminology

Thread Forms

Metric Thread

Other Thread Forms

Thread Representation

External Threads

Internal Threads

Designing Screw Thread in Drawing

Threaded Fasteners

Locking Arrangement

Creating Blocks for Repetitive Usage in AutoCAD

Creating Blocks from Individual Objects

Creating a Symbol Library

Exercise

Keys, Cotter Joints, Pin Joints

Key Joints

Key

Cotter Joint

Example of Orthographic Projection Drawing Using AutoCAD

Exercise

Paper Space and Model Space

Viewports

Model Space

Paper Space

Exercise

Solid Modelling

Solid Primitives

Construction and Display of 3-D Solid Primitives

View Directions in AutoCAD—Viewpoint

Creating Extruded Solid

Creating Revolved Solid

Creating Composite Solids

Creating Fillets and Rounds (Fillet)

Chamfer

Section (Creating a Cross-Section)

Concept of Working Plane

Creating a Solid Model of a Block with Steps

Orthographic Projection Views

Analysing Solids

Advanced Editing Commands

Exercise

Pulleys

C.I. Belt Pulleys

Speed Cone or Stepped Pulleys

Split Pulleys

Rope Pulley

V-belt Pulleys

Making a Solid Model of a V-belt Pulley

Exercise

Shaft Coupling, Clutches

Rigid Coupling

Flexible Coupling

Universal Coupling or Hooke's Joint

Clutches

Exercise

Pipe Joints

Threaded Joint

Flanged Joint

Spigot and Socket Joint

Expansion Joint

Union Joint

Pipe Drawings

Pipe Fittings

Types of Pipe Drawings

Dimensioning Pipe Drawings

Pipe Drawings Using AutoCAD

Pipe Drawing in 3-D

Exercise

Valves

Cocks

Flap Valve

Stop Valve

Feed Check Valve

Safety Valve

Exercise

Gears

Spur Gears

Rack and Pinion

Annular Gear and Pinion

Bevel Gear

Exercise

Production Drawing

AutoCAD and Production Drawing

Dimensional Tolerances

Fits

General Tolerance for Linear and Angular Dimensions

Surface Roughness

Exercise

Miscellaneous Machine Components

Bearings

Engine Parts

Internal Combustion Engine

Toolhead of a Shaping Machine

Tailstock of a Lathe

Exercise

Appendices

Creating Text Style

How to Create a New Text Style

Renaming and Deleting a Text Style

Changing a Text Style

Making a Style Current

Multiline Text

Creating Multiline Text

Import Text

Properties Tab

Line Spacing

Find/Replace Tab

Color, Linetype and Line Weights

Setting the Color, Linetype and Line Weight of an Object

Controlling Color

Changing Color of Object by Grips

Controlling Linetypes

Steps to Load a Linetype

Setting the Linetype Scale (Ltscale)

Controlling Lineweights

Editing Objects by the Properties Window

Ordinate Dimension

Ordinate Dimension—Dimordinate

Editing Dimensions

Editing Dimensions in AutoCAD

Editing Dimension Text—Dimtedit and Dimedit Commands

Using Grip to Edit Dimension

Using Object Properties Window

Modifying or Overriding the Dimension Style

Controlling the Dimension Settings

UCS Command