Theory of Textile Machines
(TE-311)
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Course
Code
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TE-311
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L=3 T= 1
P=0
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Name
of the course
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Theory of
Textile Machines
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Lectures
to be delivered
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52(1
Hr Each )(L=39,T=13 for each semester)
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Semester
End Examination
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Max.Time:
3hrs
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Max
Marks :100
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Min
Marks :40
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Continuous assessment
(based on sessional tests 50%, Tutorials /Assignments 30%, quiz /Seminar 10%
,Attendance 10%)
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Max
Marks :50
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Instructions
- The question paper will consist of five sections
A, B, C, D and E. Section E will be Compulsory, it will consist of a
single question with 10-20 subparts of short answer type, which will cover
the entire syllabus and will carry 20% of the total marks of the semester
end examination for the course. Section A, B, C and D will have two
questions from the respective sections of the syllabus and each question
will carry 20% of the total marks of the semester end examination for the
course.
- Candidates are required to attempt five questions
in all selecting one question from each of the section A, B, C and D of
the question paper and all the subparts of the questions in section E. Use
of non-programmable calculators are allowed.
SECTION
-A
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Basic
concepts: Kinematics of machine, kinematics link and their different
type, types of kinematics pair, kinematics chain, mechanism and inversion of
four bar chain and slider crank mechanism.
Degree of freedom. Velocity Analysis: Motion of a link, velocity of a
point on a link by relative velocity method, velocities and acceleration of
four bar mechanism, slider crank mechanisms, rubbing velocity at a pin joint. Velocity of a point on a link by
instantaneous centre method, properties and types of I-centre, Kennedy
theorem and methods of locating I-centres in a mechanism.
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Belt, rope
and chain drive: Types of belt drives, velocity ratio, law of belting,
length of belt, ratio of friction tensions, power transmitted, effect of
centrifugal tension on power transmission, condition for maximum power
transmission, concept of slip and creep.
Use of V belts, ropes, chain, chain length and angular speed ratio,
relative advantage and disadvantage of chain and belt drives.
SECTION -B
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Gears: Classification of gears, terminology used
in gear, law of gearing velocity of sliding, forms of teeth, construction and
properties of an involutes, cycloidal teeth, effect of centre distance
variation on the velocity ratio, involutes profile tooth gear, length of path
of contact, arc of contact, number of pairs
in contact, interference, minimum number of teeth to avoid the
interference between rack and pinion, undercutting, terminology of helical
and worm gears.
Gear trains:
Definition, simple, compound, reverted and epicyclic gear trains, velocity
ratio of epicyclic gear trains.
SECTION -C
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Cams and
follower: Types of cams and followers, cam terminology, types of motion
of the follower, analysis of motion of the follower, analysis of motion of
the follower for cams with specified
contours.
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Balancing: Static and dynamic balancing, balancing of
several masses in different planes, balancing of reciprocating masses, balancing
machines.
SECTION -D
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Flywheels: Turning
moment diagram for
steam engine, four stroke internal combustion engines, fluctuation of energy
and speed in flywheels, use of flywheel
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Application in Textiles: Belts, chairs,
gear drives in textile machines. Different types of cam followers used in
textile machines.
TEXT BOOKS
1.
Bevan T, “The Theory of Machines”, CBS Publishers and
Distributors, New Delhi, 2002.
2.
Bansal R K, “A text book of Theory of Machines”, Laxmi
Publication Pvt. Ltd, New Delhi.
REFERENCE BOOKS
- Rattan S S, “Theory of Machines”, Tata Mc Graw Hill, New Delhi, 2001.
- Ghosh A and Mallik A K, “Theory of mechanism and machines”, Affiliated East West Press Pvt. Ltd, New Delhi, 1988
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