COMPUTER AIDED ENGINEERING DRAWING

2014 Scheme

Subject Code: 14CDE14/14CDE24

IA Marks: 25

Hours/Week: 06 (Instruction 2Hrs. + Sketching & Practice 4 Hrs.)

Exam. Hours: 03

Total Hours: 56

Exam. Marks: 100

Module – 1

Introduction to Computer Aided Sketching :

Introduction, Drawing Instruments and their uses, BIS conventions, Lettering, Dimensioning and free hand practicing. Computer screen, layout of the software, standard tool bar/menus and description of most commonly used tool bars, navigational tools. Co-ordinate system and reference planes. Definitions of HP, VP, RPP & LPP. Creation of 2D/3D environment. Selection of drawing size and scale. Commands and creation of Lines, Co-ordinate points, axes, poly-lines, square, rectangle, polygons, splines, circles, ellipse, text, move, copy, off-set, mirror, rotate, trim, extend, break, chamfer, fillet, curves, constraints viz. tangency, parallelism, inclination and perpendicularity. Dimensioning, line conventions, material conventions and lettering. 12 Hours

Module – 2

Orthographic Projections :

Introduction, Definitions - Planes of projection, reference line and conventions employed, Projections of points in all the four quadrants, Projections of straight lines (located in First quadrant/first angle only), True and apparent lengths, True and apparent inclinations to reference planes (No application problems).

Orthographic Projections of Plane Surfaces (First Angle Projection Only) :

Introduction, Definitions–projections of plane surfaces–triangle, square, rectangle, rhombus, pentagon, hexagon and circle, planes in different positions by change of position method only (No problems on punched plates and composite plates). 24 Hours

Module – 3

Projections of Solids (First Angle Projection only) :

Introduction,  Defin itions  –  Projectio ns  o f  right  regular  tetr ahedron, hexahedron (cube), prisms, pyramids,  cylinders  and cones in different positions (No problems on octahedrons and combination solid)  24 Hours

Module – 4

Sections and Development of Lateral Surfaces of Solids :

Introduction, Section planes, Sections, Section views, Sectional views, Apparent shapes and True shapes of Sections of right regular prisms, pyramids, cylinders and cones resting with base on HP. (No problems on sections of solids)
Development  of  lateral  surfaces  of  above  so lids,  their  frustums  and truncations. (No problems on lateral surfaces of trays, tetrahedrons, spheres and transition pieces). 12 Hours

Module – 5

Isometric Projection (Using Isometric Scale Only) :

Introduction, Isometric scale, Isometric projection of simple plane figures, Isometric projection of tetrahedron, hexahedron(cube), right regular prisms, pyramids,  cylinders,  cones,    spheres,  cut  spheres  and  combination of solids (Maximum of three solids). 12 Hours

Course Outcomes :

After studying this course,
1.  Students will be able to demonstrate the usage of CAD software.
2.  Students will be able to visualize and draw Orthographic projections, Sections of solids and Isometric views of solids.
3.  Students are evaluated for their ability in applying various concepts to solve practical problems related to engineering drawing.

Conducting classes :

Classes may be conducted in two slots/ week of 3 hours each (Instruction 1 hr. + Sketching & Practice 2 hr.)

Scheme of Evaluation for Internal Assessment (25 Marks) :

1.  15    Marks    for    Class    work    (Sketching    &    Computer    Aided Engineering drawing printouts in A4 size sheets).
2.  10   Marks   for   test   in   the   same   pattern   as   that   of   the   main examination. (Better of the two Tests).
All the solutions must be valued on the spot by examining the sketches, display and the  hard copies. All the  sketches including the  computer printouts must be submitted and they must be preserved for one year.

Scheme of Examination:

1.  Module -1 is only for practice and Internal Assessment and not for examination.
2.  Question paper for each batch of students will be sent online by VTU and has to be downloaded before the commencement of Examination of each batch. The answer sheets will have to be jointly evaluated by the Internal & External examiners.
3.  A maximum of THREE questions will  be set as per the following pattern (No mixing of questions from different Modules).

All the Best ..!!