TA 101: Technical Arts2015-16 II

Dr. Prishati Raychowdhury

Department of Civil EngineeringIIT Kanpur

Office: FB 336; Phone: 6692E-mail: prishati@iitk.ac.in

Why to learn Technical Art? Can you describe this object in words to someone so

that they can manufacture it?

Diesel Engine Block (4-Cylinder)

Not easy!

A Machine

www.excelfibre.com, www.rijo42.co.uk, blog.pactapp.com

A Toy

http://www.ebay.com/gds/Ride-on-Toy-Train-Buying-Guide-/10000000178706250/g.html

Car/Train/Airplane

A Building

P. K. Kelkar Library, IITK

A Bridge

Howrah Bridge

http://www.thousandwonders.net/Howrah+Bridge

A Bridge

Golden Gate Bridge

A Dam

Hoover Damhttp://wall.alphacoders.com/big.php?i=553442

Urban Infrastructure

https://www.flickr.com/photos/fangwei/8288204632/

DESIGNERS may have been a single person or a team of few

Design had to be COMMUNICATED to those building it (BUILDER/MANUFACTURERS)

COMMUNICATION could have been possible only through ‘SKETCHES’ or ‘DRAWINGS’

Goal of Engineering Drawing• To convey all the required information that will allow

a manufacturer to manufacture a product

A good drawing should..• Include information about a product on its geometry,

dimension, material, finishing, and any other details necessary to produce the object

• Be unambiguous, complete, suitable for duplication, language independent, and conforms to standards

History of Technical Drawing Monge was a French mathematician

and served as the Minister of the Marine during the French Revolution

He was the inventor of descriptive geometry (or Technical Drawing/ Drafting)

Pictures, sketches were used to communicate but there were no uniformity

Architects, builders, engineers, designers had difficulty in understanding figures

Monge formalized the TECHNICAL DRAWINGS, what we know as ORTHOGRAPHIC PROJECTIONS

Gaspard Monge (1746-1818)

TA 101: Course Objective

To learn the fundamentals of Technical Drawing in THEORY and PRACTICE using:

Free hand sketchingDrafting with help of hand-held drafting toolsComputer Aided Drafting (AutoCAD)

When and Where?

• Lecture: T 3-4 pm, L-7Th 2-3 pm, L-7

• Lab: M-Th 10 am – 1 pm, Northern lab, Drawing hall

o The class has been divided into twelve batches B1 to B12 (~35 each)

o Check DoAA web-site (or OARS) for your batcho Each batch has a tutor (faculty/Ph.D. student) and two

teaching assistants (M.Tech/PhD/Dual-Degree students)o Tutor is your first contact person

Tutors

SL. No.

Section Tutor Dept Email Tel. Office Location

1 Ms. Nidhi Sharma AE snidhi@iitk.ac.in

2 Mr. Subhabrata Koley AE skoley@iitk.ac.in

3 Mr. Sarthak Sambit Singh AE sarthak@iitk.ac.in

4 Mr. Yasar Arafath AE yasaru@iitk.ac.in

5 Dr. Mukesh Sharma CE mukesh@iitk.ac.in 7759 WLE 3026 Dr. Tarun Gupta CE tarun@iitk.ac.in 7128 FB 3107 Dr. Ashu Jain CE ashujain@iitk.ac.in 7411 FB 3158 Dr. Ashish Dutta ME adutta@iitk.ac.in 7562 FB 3389 Dr. Ishan Sharma ME ishans@iitk.ac.in 6152 NL 102

10 Dr. B L Sharma ME bls@iitk.ac.in 6173 FB 35611 Mr. Rahul Oarath ME rahulo@iitk.ac.in

12 Dr. Amritanshu Sriwastava CE amritan@iitk.ac.in

Course Outline

Week Lecture Lab Assignments Home Assignments1 Lettering and construction None None

2 Orthographic projections Lettering and construction None

3 Orthographic projections with dimensioning Orthographic projections Lettering and construction

4 Isometric views and projection Orthographic projections with dimensioning Orthographic projections

5 Pictorial views Isometric views and projection Orthographic projections with dimensioning

6 Missing views and lines Pictorial views Isometric views and projection

7 Sectional views Missing views and lines Pictorial views

8 Perspective views Sectional views (AUTOCAD) Missing views and lines

9 Lines and planes 1 Perspective views Sectional views

10 Lines and planes 2 Lines and planes 1 Perspective views

11 Auxiliary views Lines and planes 2 Lines and planes 1

12 Intersection of solids Auxiliary views Lines and planes 2

13 Development of surfaces Intersection of solids Auxiliary views

14 Review Development of surfaces Intersection of solids

Total LA = 13 Total HA = 12Total Lecture = 27

January 2016 CalendarMonday Tuesday Wednesday Thursday Friday Saturday Sunday

31 LECTURE 1

2.00-3.00 PM (L7)

1LECTURE 2

EXTRA CLASS 5 – 6 PM (L7)

2 3

4 5LECTURE 3

3.00-4.00 PM (L7)

6 7LECTURE 4

2.00-3.00 PM (L7)

8 9 10

11 12LECTURE 5

3.00-4.00 PM (L7)

13 14LECTURE 6

2.00-3.00 PM (L7)

15 16 17

18 19LECTURE 7

3.00-4.00 PM (L7)

20 21LECTURE 8

2.00-3.00 PM (L7)

22 23 24

25 26REPUBLIC DAY

27 28LECTURE 9

2.00-3.00 PM (L7)

29MAKE-UP LAB FOR TUESDAY BATCHES

30 31

LAB 1 (LETTERING AND CONSTRUCTION) 10.00 AM-1.00 PM

LAB 2 (ORTHOGRAPHIC PROJECTION) 10.00AM-1.00PM

LAB 3 (ORTHOGRAPHIC PROJECTIONS WITH DIMENSIONS)

LAB 4 (ISOMETRIC VIEWS AND PROJECTION) 10.00AM-1.00PM

February 2016 CalendarMonday Tuesday Wednesday Thursday Friday Saturday Sunday

1 2 LECTURE 10

3.00-4.00 PM (L7)

3 4 LECTURE 11

2.00-3.00 PM (L7)

5 6 7

8 9 LECTURE 12

3.00-4.00 PM (L7)

10 11 LECTURE 13

2.00-3.00 PM (L7)

12 13 14

15 16 17 18 19 20 21

22 23 LECTURE 14

3.00-4.00 PM (L7)

24 25 LECTURE 15

2.00-3.00 PM (L7)

26 27 28

29

MID SEMESTER EXAMINATION

LAB 5 (PICTORIAL VIEWS) 10.00AM-1.00PM

LAB 7 (SECTIONAL VIEWES, AUTOCAD) 10.00AM-1.00PM

LAB 6 (MISSING LINES & VIEWS) 10.00AM-1.00PM

March 2016 CalendarMonday Tuesday Wednesday Thursday Friday Saturday Sunday

29 1 LECTURE 16

3.00-4.00 PM (L7)

2

3 LECTURE 17

2.00-3.00 PM (L7)

4 5 6

7 8LECTURE 18

3.00-4.00 PM (L7)

9 10LECTURE 19

2.00-3.00 PM (L7)

11 12 13

14 15LECTURE 20

3.00-4.00 PM (L7)

16 17LECTURE 21 2.00-3.00 PM (L7)

18 19 20

21 22 23 24 HOLI

25 GOOD FRIDAY

26 27

28 29 LECTURE 22

3.00-4.00 PM (L7)

30 31LECTURE 23

2.00-3.00 PM (L7)

MID SEMESTER RECESS

LAB 8 (PERSPECTIVE VIEW) 10.00AM-1.00PM

LAB 9 (LINES AND PLANES 1) 10.00AM-1.00PM

LAB 10 (LINES AND PLANES 2) 10.00AM-1.00PM

LAB 11 (AUXILLIARY PLANE) 10.00 AM-1.00 PM

April 2016 CalendarMonday Tuesday Wednesday Thursday Friday Saturday Sunday

1 2 3

4 5LECTURE 24

3.00-4.00 PM (L7)

6 7LECTURE 25

2.00-3.00 PM (L7)

8 9 10

11 12LECTURE 26

3.00-4.00 PM (L7)

13 14LECTURE 27 2.00-3.00 PM (L7)

15 RAM NAVAMI

16 17

18 19 20 MAHAVIR JAYANTI

21 22 23 24

25 26 27 28 29 30 31

END SEMESTER EXAMINATION

LAB 12 (INTERSECTION OF SOLIDS) 10.00AM-1.00PM

LAB 13 (DEVELOPMENT OF SURFACES) 10.00AM-1.00PM

Important Note !!

• Tomorrow we have an extra class • Time: 5-6 pm• Venue: L-7

After each class, lecture notes will be posted in my homepage: http://home.iitk.ac.in/~prishati/TA101.htm

Things you need to purchase

• The “Instruction Manual” containing general instructions, and lab and homework problems available at COPY POINT at Shopping Center

• The instruments and materials listed in the Instruction Manual

• Sketch-book for free-hand sketching and preparing solutions to lab & HW problems

(Noble Bookstore, Tarun Bookstore or Copy Point)

Drawing Instruments• A good quality drafter• A large compass (150 mm), a bow compass with adjusting

screws (100 mm)• A large divider, a bow divider with adjusting screws (100 mm)• A pair of set squares: 45°-45°, 30°-60° (250 mm, 2.5 mm thick)• A protractor• A ruler, 300 mm (steel or hard plastic)• Good quality drawing pencils (2H, H, HB)• A sharpener, a good quality eraser, a clean soft cloth, and a

sticking tape• A notebook containing A4 size graph sheets, plain sheets, and

isometric grid sheets• Regular drawing sheets (A3 size)

Drawing Instruments

Drawing Pencils

SOFT

HARD

MEDIUM

Drawing Sheets

Important Note

• All labs on A3 DRAWING SHEETS (unless specified otherwise)

• All homework on A3 drawing sheets (unless specified otherwise)

• All sketches in TA101 Sketchbook

• GRID BOOK for proportional sketches

Important Note Prepare well for the laboratory sessions in advance Sketch free-hand solution to the problems (use graph

sheet/sketch book) before going to the laboratory session

You need to submit this rough sketch along with your lab sheet at the end of each laboratory session (and this will carry weightage)

If you miss a lab for a valid reason (proper justification required), you can do a make-up lab with any other section on the same week

Once the solutions are posted, late submissions or make-up labs will NOT be permitted

BookTEXT BOOKSFrench, T. E., Vierck, C. J., Foster, R. J., Engineering Drawing and

Graphic Design. Tata McGraw-Hill Edition, Fourteenth Edition, 2012.

(Original edition: McGraw-Hill Book Company New York, Fourth Edition, 1984 : Available in Library)

Bhatt, N. D., Elementary Engineering Drawing, Charoter Publishing, Anand, Thirty First Edition, 1990.

REFERENCE BOOKLuzadder, W. J., Duff, J. M., Fundamentals of Engineering

Drawing, Prentice-Hall India, New Delhi, Eleventh Edition, 1983.

Grading Policy

Item Weight

Home assignment 10%

Lab assignment (including preparation) 25%

Mid-semester examination 25%

End-semester examination 40%

Drawing Basics

Types of Lines

Object/Dimension

Construction/Projection

Hidden

Centerline

Hinge line

Object Lines and Hidden Lines

Object LineHidden Line

Center Lines

Center Lines

Used to show centers of circles and arcs and to show the center of axis of circular or symmetrical forms

Construction Lines

ConstructionLines

(Light)

IMPORTANT NOTE: Object lines and construction lines should always be distinguishable You may use H for object lines and 2H for construction lines You should NOT erase the construction lines after drawing (in this course)

Lettering

‘Lettering’ is used to describe the size and other information necessary to manufacture the designed object

Principles of Lettering:• Each letter must be distinct• The vertical axes passing through all letters are parallel. No

slant!• Each letter is made up of a series of single strokes• Judging by the eye, the distance between the letters should

be approximately equal• Engineering lettering is commonly UPPERCASE• Use H Pencil for Letters and Number

Lettering

• May use guiding lines initially– Eventually should avoid using guiding lines

A a

Lettering: Acute Angle Stroke

Stroke the pencil in the acute angle direction. This will save the paper from tearing

Lettering: Pencil Strokes

A

Lettering: Pencil Strokes

Lettering: Pencil Strokes

Lettering: Pencil Strokes

Why to take so much trouble?

• Drawings made in one country may be used for manufacturing parts or assembly in another country !

• Need for STANDARDS ! (BIS, DIN, JIS, ASTM …)

Drawing a perpendicular

L

Q

L

Q

R

R1 R1

Point not on a line

Perpendiculars to and from a line

Point on a line

LQ

R

R1 R1

R

LQ

C

A

M

R

Arc tangents to lines and arcs

R1 R2

R1 + RR2 + R

R1 R2R – R1

R – R2

R

R

L

L‘R

Line and angle bisectors

L

Dividing a line into several segments

L

Acknowledgement

• Prof. N. N. Kishore, ME• Prof. Anupam Saxena, ME• Prof. Ashish Dutta, ME• Prof. Vinod Vasudevan, CE• Prof. Tarun Gupta, CE• Mr. Ashwani Kumar, ME• TAs and Tutors of TA 101

Wish You a Happy and Prosperous New Year..