industrial automation paper - me

8/7/2019 Industrial Automation Paper - ME

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Total No. of Questions :8) ITotal No. of Pages :2

P1441J3865)-653

M.E. (Production) (Manufacturing And Autonlation)INDUSTRIALAUTOMATION.

(2008 Course)

Time: 3Hours!

Illstructiolls to the calldidates:

J) Allswer allY three questiollsfrom each sectioll.

2) Allswers to the two sectiolls'should be'writtell ill separate books.

3) Neat diagrams must be drawII wherever necessary.

4) Figures to the right indicatefull marks.

5) Use of logarithmic tables, slide rule, Mo/lier charts, electronic pocket calculator

and steam tables is allowed.

{Max. Marks :100

6) Assume suitable data, if necessary.

SECTION - I

Ql) a) A part to be produced on an automated transfer line has total work

content of 40 min. and is equally divided among all workstations. The

time required to transfer the part between two stations is 8 sec. Frequency

of breakdown is 0.006 and average downtime per station is 10 min.

Using upper bound approach determine the number of workstations that

should be included in a line to maximize the production rate. Also compute

the production rate and line efficiency for this number of workstations. [8]

~ The work elements, their times and precedence constraints are shown intable, for a assembly line. Determine the cycle time and balance delay

using Ranked positional weights methods if the number of workstations

are to be limited to 3. [8J

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P.T.O.

Element Te(min.) Preceded by Element Te(min. ) Precededby1 0.4 ----- 6 0.2 3

J 0.7 I 7 0.3 4- ..... 0.5 I 8 0.9 49-,

f--. ,

4 0.8 J 9 0.3 5,6.....

I 5 1.0 J .... 100.5 J 7,8

II

..,J



~ ------

,.

Q2) a) A hydraulic system isoperating at 300 barwith pump flow30 1Imin.The

input power to the pump drive is 15kW. The pump is loaded for 60% of

'the operating time. The overall efficiency when it is on lo~d is 70% . If

the ambient temperature is20° and maximum permissible fluid temperature

in the reservoir is 55°. Calculate the suitable size of the reservoir ifit is of

square section of size 'a' with length '2a'. [10J

b) Explain with neat sketch the working of deceleration valve. [6J

Q3) a) Draw a pneumatic circuit for a machine operated either by manual switch

or automatic switch and to ensure that the workpiece is properly clamped

and door of the machine is not open. [81

b) Explain with suitable example the working of time delay valve used in

pneumatic circuits. (8)

Q4) Write short notes on : [18J

a) Transfer line monitoring systems.

b) Proportional hydraulic valves.

c) Cascade method for pneumatic circuit design.

Q5) a)

b)

Q6) a)

b)

Q7) a)

b)

SECTION - II

What is microprocessor? Sketch the general architecture of

microprocessorand explainthe functionof variousparts. (8)Write an assembly lar.guage program for addition of two numbers. [8)

Explain with neat sketch any two types of escapements. Also mention,

their industrial applications. (8)

Explain automated handling and loading system in transfer lines. [8]

Explain with neat sketch robot vision system. (8)

Which kinematic parameters are variables for a revolute joint and for

prismatic joint? [8]

Q8) Write short notes on :

138651..(;53

1181

a)

b)

c)

Industrial applications of expert systems.

Use ofoscilJating disks for automated orientation of workpiece.

Programmable 10!liccontrollers.\... ~.

2

..



Total No. of Questions: 8]

P1474[Total No. of Pages: 2

[3665]-621

lVI.E. (ProdQction) (Manufacturing & Automation)INDUSTRIALAUTOMATION

(2008 Course)Time: J Hours] [Max. Marks: 100Instructions to the candidates:

1) Answer any three questions from each section.

2) Answers to the two sections should be written in separate books.

3) Neat diagrams must be drawn wherever necessary.

4) Figures to the right indicate full marks.

5) Use of logarithmic tables, slide rule, MollieI' charts, electronic pocketcalculator and steam tables is allowed.

6) Assume suitable data, if necessary.

SECTION - I

Ql) a)- In a operation of certain 15 station transfer line, the ideal cycle time is

0.58 min. Breakdown occurs at the rate once every 10 cycles and the

average downtime per breakdown ranges between 2 and 9 min, with

an average of 4.2 min. How many parts will the line be capable of

producing during an average week if the company works for 40 hours

per week. . [10]

'v/b) Explain Kilbridge and Wester's methods for assembly line balancing.

[6]

Q2) a) A reservoir of size 0.5 x 0.5 x 1.2 m is used in a hydraulic system

having pump flow 25 lpm with input power. to pump drive of lSkW.

The pump is loaded for 40% of the time and the overall efficiency

when it is on is 75%. Calculate the maximum fluid temperature in the

reservoir if the ambient temperature is 20°. [10]

b) Explain with neat sketch the working of pressure and temperature

,compensated flow control valve. [6] I

-Q3) a) Draw a suitable pneumatic circuit for a driven by a single acting cylinder

with actuation of at least two (of three) manually operated valves. [8]

Draw the suitable pneumatic circuit using cascade system for sequential

extension and simultaneous retraction of tree cylinders. [8]

P.T.O.



Q4) ,Write short notes on any three:

,~-a) 4/2-seat type direction control valve.

vb) Electro hydraulic servo valves.

c) Pressure intensifiers.

~<,d) Assembly line balancing algorithms.

[18]

SECTION- II

Q5) a) Explain for a microprocessor, the roles of :

i) Accumulator_

ii) Status

iii) Memory addressiv) Program counter registers

Explain with suitable examples the use of timers in PLC.

[8]

b) [8]

Q6) a)

b)

Explain with neat sketch any two types of rotary feeders.

Explain -various principles of material handling systems.

[8]

[8]

C1y()()veYQ~Explain with neat sketches common robot configurations. [8],A.p.S. b) State the rules for establishing the link co-ordinate frames of a

manipulator. [8]

(Q8) Write short notes on any three:

a) Forward and inverse kinematics. . .

Ifu) Traffic control and safety for AGV's. "~

c) Feedback control system.

~Position control system in robotics.

[18]

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13665)-621 2



P1496

- 3411 <:: 2-~- "03'

[Total No. QfPages ":3

[3565]- 616. . . ~" . CM.E. (Prod.)

INDUSTRIALAUTOMATION ~(ManufacturingAnd-Automation)

Ll3(2008Course) . .- 2-

Total No. of Questions: 8]

Time: 3Hours] .

Instructions to the.calldidates:-

1) Answer any "threequestions from each section.

2) Answers tot/1.etwo.sections should be written in separate books.

3) Neat diagrams must be drawn wherever necessary.

4) Figures to the right indica!~full marks.

5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculatorand steam table is allowed.

6) Assuil1e suitable data, if necessary.

/Max. Marks: 100

..

SECTION - I

b)

An automated transfer line is divided into two stages with nine stations in

each stage. Each station has cycl~ time of 1]~fn. and frequency offailure

0.01. Average downtime per stop is 8 min. and a constant downtime

distribution is assumed. Determine the required capacity of each storage

buffer such that the improvement in the line efficiency compared to zero

capacity buffer is 80% of improvement yielded by "buffer with infinitecapacity. [10]

Explain ranked positional weights methods for assembly line balancing. 2-

t\<-,\' c [6]

~l) a)

/(22) a) A single acting up stroking press having cylinder bore diameter of 400

" mm and cycle time of 60 second~ has rapid approach of 180 mm in 10

sec. at 30 bars, pressing' operation for 50 mm in 12 sec. at 3-00bars and

curing in 20 sec. Draw a suitable hydraulic circuit using accumulator and

also calculate the size of accumulator and efficiency of circuit. The retu~'nis by gravity. " [10]

b) Explain with neat sketch the working of counterbalance valve and draw a "

(. ('i \t:~~~_alcircuit showing its ap~lic"ation. ( kb7 ) 2 4C) Cl2.'5"] [6]

-

-,........

"p.T.o.



.. , ~"~1/Ii

,,.

uraw the sUItable ' pneumatic circuit using cascqde system to actuate.

cylinder A,. cylipder B, and cylinder C as pei following position ~tep'

diagram. (fig. 1).' " [12]....

A

B

c

II . III IV V

f,'~ .j,

Sketch and exp~ain twin pressur~ valve. llG-II.) [4]

~) ;rite short notes on any three:

~ Electro-hydraulic servo valves. 2...

~. Variable displacement pump control systems. :) (6 -7)c) Pneumatic sehsors. '

~ Aut<;>mation strategies. CI~ -~H-G') '.! ( \"_0, . r:\, ,e...('~.

r~a)b)

[3565]-616

[18]

SECTION - II

How'many status flag does 8085 microprocessor have? Discuss the role

of each flag. (~\~) . . [6]

Draw the ladder diagram for performing drilling operation in an object

moved on conveyor belt to fulfill following requirements: [10]i) Start the machine.

ii) Conveyor motor ON till the proper positioning of the workpiece:

iii) WorkpIece clamped.

iv) Drilling spindle motor ON.

v) . Drill hole togesired depth.

vi) Red light ON in case of thermal overloading.

vii)' After drilling spindle moves up to predetermined position.viii) .Stop themachine.

2



,. . ~6J. a) Discuss various ways bywhich guidanceofAGV's canbeaccomplished. 3

. . 1~S"-2'JK -~etr [6]

~ Explain the effectofpartpopulation, effectof speed,and effectofnumber

'i J.t.~\C.< of reciprocating strokes on the .feed rate in case of recipro'cating fork\ feeder used in automated assembly systems.. [10]

;

.~..,:-.~-...,

. .

~'7~ Wl}at are types of end effectors? Explain any two grippers with neat Jsketches. [8]

,.,.'1J) Discuss the equations of motion for dynamic modeling of manipulators

using Newton-Euler approach. - \'f:, [8]

).

Q8) Write short notes:on any three:

~roximitY sensors. 2-..

b) Low cost automation._ .;;.-;/ . ./\ \ V I'> L .

~Robot pr-ogramming languages.,_~ t~_! . .

: d) Transfer mechani~ms in automated systems. )~,,\~.,~\ r '."

[18]

-\7'S- -rt5'

[3565]..616 3

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industrial automation paper - me

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