Post on 04-Dec-2015
description
INSTRUCTORMUHAMMAD AAMIR KHAN
aamir5500@gmail.com
Bachelor’s Degree in Mechanical Engineering from UET,Peshawar,2004
Master’s Degree in Mechatronics Engineering from Loughborough University, UK,2007
• Since 2008, teaching in WEC as Lecturer/ Assistant Prof
Class Introduction
2
• Name• Belong From?• Qualification• Future career aspirations• Goals in life• Hobbies • Time you devote for your studies• 1 weakness• 1 strength • Grade in F.Sc / B. Sc / DAE
ME- 102ENGINEERING DRAWING & GRAPHICS
04/18/2023 3
Credit Hours Theory + Practical
(0) (2)
WEC
Class Structure & Policies
4
• Attendance Mandatory• Attendance marked as absent after 5
minutes
• Assignments• Regular home work and in class quizzes• Home work due as specified• 50% off for late home work
• Practicals• Examinations
• As per university policies
Course Outline
04/18/2023 5
PART – I•IntroductionTypes of lines, lettering, dimensioning, use of pencil and drawing instruments, planning of drawing sheet
•ProjectionsTypes of projections, orthographic projections, plane of projections, four quadrants, projection of points, projection of straight lines, examples with different quadrants, traces of a line, true length of a line, inclination to both the planes, projections of oblique and auxiliary planes.
•Loci of points and generated curvesLoci of points and straight lines, Cycloid, Epicycloid, involute, archemedian spiral.
Course Outline
04/18/2023 6
• Development of solidsTypes of solids, polyhedra, solids of revolution, prism, pyramid,
cylinder, cone, sphere.
• Intersection of surfacesIntersection of : cylinder and cylinder, cylinder and cone, cone
and cone, cone and prism.
• Projection of solidsProjection of various solids in simple position and inclined
positions.
• Section of solids True shape of section on auxiliary plane of various solids.
continued…
Course Outline
04/18/2023 7
PART - II• Isometric and pictorial projections of solids / machine parts,
Making of free hand sketches from solid objects and from orthographic projections. Sections of joints, screw thread systems, nuts and bolts, keys and cotter, coupling and simple bearings, pipe connections and engines details, preparation of assembly drawings, introduction to computer aided engineering drawing and use of software / package.
RECOMMENDED BOOKS• Engineering Drawing and Graphics by N.D.Bhatt. 49th Edition.• A First Year Engineering Drawing by A.C.Parkinson. 6th Edition.
Introduction
Standards are set of rules that govern how technical
drawings are represented.
Drawing standards are used so that drawings convey
the same meaning to everyone who reads them.
ISO International Standards Organization
Standard Code
ANSI American National Standard InstituteUSA
JIS Japanese Industrial StandardJapan
BS British StandardUK
AS Australian StandardAustralia
Deutsches Institut für NormungDINGermany
Country Code Full name
Partial List of Drawing Standards
JIS Z 8311 Sizes and Format of Drawings
JIS Z 8312 Line Conventions
JIS Z 8313 Lettering
JIS Z 8314 Scales
JIS Z 8315 Projection methods
JIS Z 8316 Presentation of Views and Sections
JIS Z 8317 Dimensioning
Code number Contents
Traditional Drawing Tools
Traditional Drawing Tools
DRAWING TOOLS
1. T-Square 2. Triangles
DRAWING TOOLS
3. Adhesive Tape 4. Pencils
2H or HB for thick line4H for thin line
DRAWING TOOLS
6. Compass
DRAWING TOOLS
9. Circle Template 10. Tissue paper
DRAWING TOOLS
11. Sharpener 12. Clean paper
DRAWING TOOLS
Drawing space Drawingspace
Title block
d
d
c
c
cBorder lines
1. Type X (A0~A4) 2. Type Y (A4 only)
Orientation of drawing sheet
Title block
Sheet size c (min) d (min) A4 10 25 A3 10 25 A2 10 25 A1 20 25 A0 20 25
TITLE BLOCK
Drawing Sheet
Trimmed paper ofa size A0 ~ A4.
Standard sheet size (JIS)
A4 210 x 297
A3 297 x 420
A2 420 x 594
A1 594 x 841
A0 841 x 1189
A4
A3
A2
A1
A0(Dimensions in millimeters)
Drawing Scales
Scale is the ratio of the linear dimension of an element
of an object shown in the drawing to the real linear
dimension of the same element of the object.
Size in drawing Actual size
Length, size
:
Drawing Scales
Designation of a scale consists of the word “SCALE”
followed by the indication of its ratio, as follow
SCALE 1:1 for full size
SCALE X:1 for enlargement scales
SCALE 1:X for reduction scales
Basic Line Types
Types of Lines AppearanceName according
to application
Continuous thick line Visible line
Continuous thin line Dimension line
Extension line
Leader line
Dash thick line Hidden line
Chain thin line Center line
NOTE : We will learn other types of line in later chapters.
Visible lines represent features that can be seen in the
current view
Meaning of Lines
Hidden lines represent features that can not be seen in
the current view
Center line represents symmetry, path of motion, centers
of circles, axis of axisymmetrical parts
Dimension and Extension lines indicate the sizes and
location of features on a drawing
Example : Line conventions in engineering drawing