Machine drawing

Explaining all the concepts of machine drawing through illustrations and minimum theory, the book tries to give a near visual appeal to the book. The books assumes no prior knowledge of the subject and hence starts from the fundamental topics such as simple geometric constructions, orthographic and isometric projections, and moves on to the drawing of different machine elements, assembly drawing of machine parts, limits, tolerance, and fits, and surface roughness and finish. A chapter on AutoCAD commands and computer graphics has been included in the beginning of the book and in the later chapters along with hand drawings, drawings using the AutoCAD software are also explained. Packed with numerous end chapter exercises in the form of multiple choice questions, review questions, drawing exercises, and CAD exercises, the book provides ample practice to ensure students apply each and every concept learnt through the book.

1. Introductory concepts aamp, BIS conventions. Introduction. Classification of drawing. Code of practice. Drawing instruments. Drawing board. T - square. Set square. Protractor. Drafting machine. Ruling machine. French curves. Scales. Pencils and eraser. Compass and dividers. Size and layout of drawing sheets. Dimension. Title block. Borders and frame. Centring marks. Grid reference system. Trimming marks. Folding of drawing sheets. Description of different types of lines. Lines used in construction drawing. Lines used in mechanical drawing. Patterns of lettering. Patterns of section aamp, other conventions. General system of dimensioning. Basic rules of placements of dimensions. Elements of dimensioning. System of dimensioning. Arrangement of dimensions. Special indications in dimensioning. Conventional representation of threads aamp, threaded parts. Representation of single entity. Representation of assembled parts. Designation and dimensioning of threaded parts. Conventional representation of springs. Conventional representation of gears. 2. Computer aided drafting. Introduction. Advantages of using CAD. Introduction to AutoCAD. AutoCAD screen. AutoCAD commands. Proceed with AutoCAD 2009. Selection of pattern of coordinate. Selection of system of coordinate. Selection of unit. Drawing basic entities. Modifications. Save and output. Drawing aids. 3. Simple geometric constructions. Introduction. Drawing perpendicular line. Drawing bisector of a line. Drawing bisector of a circular arc. Drawing parallel line. Dividing a line. Dividing an angle. Dividing a circle. Determination of centre of a circular arc. Drawing circular arc satisfying different conditions. Drawing tangent and normal to a given arc satisfying different conditions. Drawing polygons satisfying different conditions. Some special constructions. AutoCAD supplement. 4. Curves of conic sections aamp, special curves. Introduction. Curves of conic sections. Cutting plane approach. Locus approach. Analytical approach. Drawing an ellipse. Drawing tangent and normal of an ellipse. Determination of major and minor axis of an ellipse. Discussion on some geometric properties of an ellipse. Drawing a parabola. Drawing tangent and normal of a parabola. Determination of axis, focus and directrix of a parabola. Drawing a hyperbola. Drawing tangent and normal of a hyperbola. Drawing asymptotes and directrices of a hyperbola.. Roulettes. Roulettes of cycloidal type. Cycloid. Inferior and superior trochoid. Epicycloid and hypocycloid. Inferior and superior epitrochoid. Inferior and superior hypotrochoid. Roulettes of involute type. Involute of equilateral triangle. Involute of square. Involute of right pentagon. Involute of right hexagon. Involute of circle. Involute of semicircle. Special curves. Evolute. Evolute of ellipse. Evolute of parabola. Evolute of hyperbola. Spirals. Archimedean spiral. Logarithmic spiral. Helix. AutoCAD supplement. 5. Projec

Dr Basudeb Bhattacharyya is currently Associate Professor, Department of Aerospace Engineering and Applied Mechanics, Bengal Engineering and Science University, Shibpur (previously known as Bengal Engineering College). He obtained his M.E. in engineering mechanics and Ph D in structural engineering from Bengal Engineering College, Kolkata. Dr Bhattacharyya has over 13 years of teaching experience and has published several research papers in national & international journals. He is also a senior member of different professional bodies. He is also the author of Engineering Mechanics published by Oxford University Press in 2008.