Mechanical Draftsman
Topics
Introduction to Engineering drawing Role of draughtsman in Engg. Industry.
Drawing instruments and their uses. Types of lines, Lettering (Text, Font)
Practice
Scales, Sizes of Scale, Representative fraction (R.F), classification of scales some important conversion.
Practice
Dimensioning, Basic principle of dimensioning
Practice
Geometrical Constructions – Line, arc, polygon & Handlepractice
Engineering curves & Loci Of Points: - Bisect, Divide, Tangent arc, Pentagon Construction of ellipse by arc of circle method, rectangle method, hyperbola, Epicycloids hypocycloid, Involutes etc.
Exercise
Concept of projections, Principle of projection, methods of projection, projection of an object, Orthographic / Isometric projection
Practice
Principle views & principle planes of projection, system of orthographic projection –
- 1. First angle projection method
- 2. Third angle projection method
Practice
Projections of points – Projection of points in four quadrantPractice
Projection of straight lines, projection of lines inclined to one surface plane only and lies in one QuadrantPractice
Projection of planes – Circular, square, rectangular, pentagonal and hexagonal shapes, inclined to one reference planePractice
Orthographic projections: First angle & third angle projection methods. Drawing orthographic from pictorial view of objectPractice
Isometric projections – Isometric scale construction, Drawing isometric views from orthographic projections.Practice
. Sectional Views – Types of sections, Interpretations of views.Practice
. Missing ViewsPractice
. Projections of solidsPractice
. Section of solidsPractice
. Development of surfacesPractice
. Free Hand Sketches – Application of Nuts, Bolts, Rivets, Riveted joints, screw threads, split pins, Keys, Couplings etc.Practice
Assembly drawings: - Study of the drawings of common of assembly, Prepares the bill of materials.Practice
Material Symbols for line: - Conventional method of showing different metals and materials in section. Ex-steel, lead, glass, rubber, Zinc, Wood, Concrete etc.Practice
Engineering Material - metals & Non Metals, ferrous metals, properties and uses of common metalsPractice
Mathematics Calculation: - units & Measurements, Conversion of Units, Area, Volume Trigonometric Ratios: - Sine, cosine & tangent.Practice
Measuring instruments: Venire Caliper, micrometer.Practice
Limits, Fits & TolerancePractice
Screw Threads & Threaded fasteners.Practice
Rivets & Riveted Joints.Practice
Students must submit drawing sheets on each Topic as Internal Assessment.TEST – 1 50 Marks
TEST – 2 50 Marks