Technical drawings have existed for centuries, long before the computerised manufacturing methods of today. Prior to the invention of computers, manufacturers relied heavily on technical drawings as their primary source of information. We typically deal with a subtype of technical drawings known as engineering drawings in the prototyping and manufacturing world, and these contain information like material and finishing requirements, part information, and — most importantly — 2D and 3D views of the part from multiple angles with dimensions and tolerances. The need for precise communication in the preparation of a functional document distinguishes technical drawing from the expressive drawing of the visual arts. Artistic drawings are subjectively interpreted; their meanings are multiply determined. Technical drawings are understood to have one intended meaning.

The book aims to shed light on some of the unexplored aspects of technical drawings. It elucidates new techniques and their applications in a multidisciplinary approach. It deals with various topics like method of presentation, drawing instruments, lettering principles and dimensioning. It also focuses on freehand drawing, projections in engineering drawings, descriptive geometry, pictorial drawing and construction. It glances at the various subfields of this subject along with technological progress that have future implications. Coherent flow of topics, student-friendly language and extensive use of examples make the book an invaluable source of knowledge. It is an essential guide for those who wish to pursue this discipline further.

Preface

1. Technical Drawing: Introduction and its Importance

1. Introduction

2. Relationship to other technical drawing types

3. Viewing of engineering drawing sheets

4. Drawing language and standards

5. Aim of drawing

6. Types of drawing and views

7. Engineering drawing requirements

8. Professional application of technical drawing

9. Technical drawing and agricultural development

10. Steps to planning drawing

11. Epilogue

References

2. Drawing Instruments: Their Standard and Uses

1. Introduction

2. Drawing board

3. T-Square

4. Drafter (Drafting M/c)

5. Set Squares

6. Drawing Instrument Box (Compass, Dividers, Scale, Diagonal

Scales etc.),

7. Pencils of different Grades

8. Drawing pins and Clips

9. Epilogue

References

3. Method of Presentation

1. Introduction

2. DRAFTING TOOLS

3. Importance of drafting

4. Drafting practices

5. Drafting aids/instruments

6. Drawing reproduction

7. Scales in drawing

8. Components of drawing

9. Epilogue

References

4. Lettering Principles and Practice

1. Introduction

2. Importance of lettering

3. Types of lettering

4. Style of lettering

5. Lettering fonts in drawing

6. Lines in lettering

7. Lettering practice

8. Drawing lettering lines

9. Epilogue

References

5. Dimensioning

1. Introduction

2. Importance of dimensioning

3. Guidelines for dimensioning

4. Types of dimensions

5. Components of dimension

6. Dimension placement

7. Rules of dimension

8. Types of dimensioning

9. Epilogue

References

6. Freehand Drawing

1. Introduction

2. Drafting

3. Lines, Polygons, Ellipse, Etc

4. Geometrical figures and blocks with dimension

5. Transferring measurement from the given object to the freehand

sketches

6. Epilogue

References

7. Projections in Engineering Drawings

1. Introduction

2. Features of projection

3. Projection of points

4. Projection of lines

5. Epilogue

References

8. Descriptive Geometry

1. Introduction

2. Orthographic projection

3. Multiview projection

4. Principles of first angle orthographic projection

5. Principles of third angle orthographic projection

6. Comparing 1st and 3rd angle projection

7. Epilogue

References

9. Pictorial Drawing and Construction

1. Introduction

2. Projection of pictorial drawing

3. Isometric drawing

4. Oblique drawing

5. Axonometric drawing

6. Perspective drawing

7. Assembly drawings

8. Sketch drawings

9. Epilogue

References

10. Conic Sections and Construction

1. Introduction

2. Construction of conic sections

3. Ellipse and its construction

4. Epilogue

References

 

Index