The book comprehensively discusses principles, techniques, research activities, applications and case studies of computer-aided design in a single volume. The textbook will serve as ideal study material for undergraduate, and graduate students in a multitude of engineering disciplines.
The book
• Discusses techniques for wireframe, surface and solid modelling including practical cases and limitations.
• Each chapter contains solved examples and unsolved exercises.
• Includes research case studies and practical examples in enabling the
user to link academic theory to engineering practice.
• Highlights the ability to convert graphic to non-graphic information
such as in drawing up bills of materials in practice.
• Discusses important topics including constructive solid geometry,
Boolean operations on solid primitives and Boolean algebra.
This text covers different aspects of computer-aided design, from the basic two-dimensional constructions through modifications, use of layers and dimensioning to advanced aspects such as three-dimensional modelling and customization of the package to suit different applications and disciplines.
It further discusses important concepts including orthographic projections, isometric projections, 3D wireframe modelling, 3D surface modelling, solids of extrusion and solids of revolution. It will serve as ideal study material for undergraduate, and graduate students in the fields of mechanical engineering, industrial engineering, electrical and electronic engineering, civil and construction engineering, aerospace engineering and manufacturing engineering.
Author(s): Wilson R. Nyemba
Publisher: CRC Press
Year: 2022
Language: English
Pages: 313
City: Boca Raton
Cover
Half Title
Title Page
Copyright Page
Dedication
Table of Contents
Preface
Acknowledgements
Author
Abbreviations
Chapter 1: Introduction
1.1 Background and history of CAD
1.2 Hardware and software requirements and devices
1.2.1 Input devices
1.2.2 Processors
1.2.3 Output devices
1.2.4 Software
1.3 Background to AutoCAD
1.4 Limitations to the use of CAD
1.5 Basics for using AutoCAD
1.5.1 AutoCAD screen
1.5.2 Keyboard and mouse
1.5.3 Object handles
1.5.4 Methods of entering commands
1.5.5 Specifying coordinates/points to the drawing editor
1.5.6 Setting drawing limits and scales
1.5.7 Types of lines used in AutoCAD
1.5.8 Saving drawings and file exchange formats
1.6 Summary and outline of book
Chapter 2: Two-dimensional drawing primitives for CAD
2.1 Introduction and origins of graphic displays on computer
2.2 Two-dimensional CAD coordinate system
2.3 Two-dimensional geometric primitives and parameters
2.3.1 Line and multiple lines
2.3.2 Circle, arc and ellipse
2.3.3 Polygon
2.3.4 Polyline
2.4 Insertion of text in AutoCAD drawings
2.5 Creating a drawing template
2.6 Practical applications
2.6.1 Linear transformations and curve approximations
2.6.2 Bezier curves and surfaces
2.7 Summary
2.8 Review exercises
Chapter 3: Editing CAD drawings
3.1 Introduction
3.2 Basic editing tools and modifications
3.2.1 Navigating through the drawing and environment
3.2.2 Entity properties
3.2.3 Erase
3.2.4 Move or copy
3.2.5 Trim and extend
3.2.6 Stretch
3.2.7 Break
3.2.8 Explode
3.2.9 Scale and zoom
3.2.10 Editing polylines
3.2.11 Multiple line editing at junctions
3.3 Advanced editing
3.3.1 Rectangular and polar arrays
3.3.2 Offset
3.3.3 Fillet and chamfer
3.3.4 Mirror
3.3.5 Divide, measure and distance
3.3.6 Hatching
3.3.7 Regeneration
3.4 Applications and productivity
3.5 Summary
3.6 Review exercises
Chapter 4: Dimensioning CAD drawings
4.1 Introduction
4.2 Dimensioning styles
4.2.1 Dimensioning attributes/terminology
4.2.2 Types of arrows
4.2.3 Text position and fit
4.2.4 Tolerances
4.3 Dimension types
4.4 Inserting dimensions
4.5 Modifying dimensions
4.6 Applications: common mistakes and remedies
4.6.1 Superfluous dimensions
4.6.2 Insufficient dimensions
4.6.3 Crisscrossing dimensions
4.6.4 Incomplete specifications
4.6.5 Over-constrained tolerances
4.7 Summary
4.8 Review exercises
Chapter 5: Layers
5.1 Introduction
5.2 Layer properties manager
5.2.1 Turning layers ON or OFF
5.2.2 Locking or unlocking layers
5.2.3 Freezing and thawing layers
5.3 Practical applications
5.4 Summary
5.5 Review exercises
Chapter 6: Orthographic and isometric projections
6.1 Introduction
6.2 Angles of projection
6.2.1 First angle projection
6.2.2 Third angle projection
6.2.3 Differences and applications of projections
6.3 Orthographic projections from pictorial views
6.4 Isometric projections from orthographic views
6.5 Boxing method
6.6 Applications and limitations
6.7 Summary
6.8 Review exercises
Chapter 7: Blocks and attributes
7.1 Introduction
7.2 Creating and saving blocks in catalogues
7.3 Inserting blocks into drawings
7.4 Typical blocks and their attributes
7.5 Applications and tutorial in electronics
7.5.1 Block attribute definition, attaching and modification
7.5.2 Managing block attributes
7.5.3 Extracting attributes and generating bills of materials
7.6 Case study: CAD suite for the automatic generation of bills of materials
7.6.1 Database management in engineering design and manufacture
7.6.2 Case study company details
7.6.3 Development of the BOM add-on utility
7.6.4 Implementation of the BOM utility
7.6.5 Implications and achievements of the BOM utility
7.7 Summary
7.8 Review exercises
Chapter 8: Three-dimensional wireframe and surface modelling
8.1 Introduction
8.2 3D coordinate system
8.3 Viewing points
8.4 Wireframe modelling
8.5 Surface modelling
8.5.1 3D face
8.5.2 Edge surface
8.5.3 Ruled surface
8.5.4 Tabulated surface
8.5.5 Elevation
8.5.6 Surface of revolution
8.6 Applications and limitations of wireframe and surface models
8.7 Summary
8.8 Review exercises
Chapter 9: Three-dimensional solid modelling
9.1 Introduction
9.2 Boundary representation (B-Rep) and solids of extrusion
9.3 Constructive solid geometry (CSG)
9.3.1 Solid primitives and building blocks
9.3.2 Boolean algebra and operations on solid primitives
9.4 Solid of revolution
9.5 Visualization of 3D models
9.6 Rendering and specifying materials for 3D models
9.6.1 Visual styles and lighting
9.6.2 Specifying and editing materials to 3D solids
9.7 Practical applications for 3D modelling
9.7.1 CSG models
9.7.2 Rendered images
9.7.3 3D printing
9.8 Summary
9.9 Review exercises
Chapter 10: 3D solid modelling in assembly and analysis
10.1 Introduction
10.2 Modelling wheel base assembly: tutorial
10.2.1 Modelling the wheel
10.2.2 Modelling the shaft and fitting to wheel
10.2.3 Modelling and assembling the bushes
10.2.4 Modelling and assembling the arms
10.2.5 Modelling and assembling the base
10.3 Analysis of the solid model
10.3.1 Sectioning model of the assembly
10.3.2 Checking for interferences
10.3.3 Determining mass properties
10.3.4 Automatically generating orthographic views
10.4 Modelling connecting rod for a diesel engine: case study
10.4.1 Modelling the connecting road primitives
10.4.2 Composite modelling of the connecting rod
10.4.3 Assembling the connecting rod
10.4.4 Sectioning (slicing) model of assembly
10.4.5 Other derivatives from the modelled connecting rod
10.5 Summary
10.6 Review exercises
Chapter 11: Customization of CAD software
11.1 Introduction
11.2 Program parameters
11.2.1 Modifying the program parameters
11.2.2 Reinitializing program parameters
11.3 Command aliases
11.4 Customizing menus
11.4.1 Menu file structure (earlier versions)
11.4.2 Pull-down menus
11.4.3 Cascading pull-down menus
11.4.4 On-screen menus
11.5 Customized pull-down menus
11.5.1 Customizing pull-down menus – earlier versions
11.5.2 Customizing menus and toolbars – AutoCAD 2021
11.6 Icon menus
11.7 Automation of tasks – script files
11.8 Customizing linetypes
11.9 Customizing hatch patterns
11.10 Case study for a power and electricity distribution company
11.10.1 Customization strategies adopted
11.10.2 Results obtained
11.10.3 CAID accomplishments
11.11 Summary
11.12 Review Exercises
Chapter 12: Management of models and drawings for output
12.1 Introduction
12.2 Model and paper spaces in AutoCAD
12.3 Viewports
12.4 Modelling cast iron base
12.4.1 Model space viewports
12.4.2 Paper space viewports
12.5 Configuring printer or plotter
12.6 Print/plot dialogue box
12.6.1 Plot style/pen assignments
12.6.2 Print/plot formats
12.7 Cloud revisions in AutoCAD
12.8 Summary
12.9 Review exercises
Chapter 13: Further practical applications for CAD: Case studies
13.1 Introduction
13.2 Applications of AutoLISP in mechanism design and analysis
13.2.1 Background to AutoLISP and case study
13.2.2 Geometrical modelling of a slider-crank mechanism
13.2.3 AutoLISP programming for simulation and analysis
13.2.4 Results and implications
13.3 Modelling and simulation using EdenLISP
13.3.1 Background to EdenLISP and case study
13.3.2 Geometrical modelling of the dump truck mechanism
13.3.3 Mathematical modelling of the dump truck mechanism
13.3.4 Simulation of the mechanism using EdenLISP
13.3.5 Results and implications
13.4 Digital inventory codification system
13.4.1 Background to case study and inventory control
13.4.2 Inventory control systems and behaviour
13.4.3 Data collection and analysis
13.4.4 Design of the inventory control system
13.4.5 Results and implications
13.5 Summary
13.6 Review exercises
Chapter 14: Typical examination questions
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Appendix A1: Selected program listings for the bom utility module for Chapter 7
Appendix A1.1
Appendix A1.2
Appendix A1.3
Appendix A1.4
Appendix A1.5
Appendix A1.6
Appendix A1.7
Appendix A1.8
Appendix A2: Selected program listings for mechanisms for Chapter 13
Appendix A2.1
Appendix A2.2
References
Index
