Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2171903 Computer Aided Manufacturing Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2171903 Date: 03/12/2019
Subject Name: Computer Aided Manufacturing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Abbreviations have usual meaning.
Q.1 (a) Give three points each on advantages and disadvantages of CAM. 03
(b) Draw the CIM wheel to understand basic functions. 04
(c) Explain closed-loop control system used in a CNC system with a schematic
diagram (include its limitation and application). Draw a block diagram of
position control loop for a closed-loop control system.
07
Q.2 (a) What is meant by the term ?group technology?? 03
(b) Brief about ?continuous path control? used in a CNC machine tool system. 04
(c) Explain the ?stick-slip phenomenon? encountered in conventional friction
guideways. How is it overcome with the use of anti-friction guideways?
07
OR
(c) Write an NC part program for drilling three holes in the plate shown in
Figure 1. Work material is a machinable grade of alluminium 10-mm thick.
Specify the cutting tool and describe your procedure for this task. Feed and
cutting speed for the work material are 0.05 mm/rev and 0.37 m/sec
respectively. Show interpretation of each block you write in a remark
column.
Dimensions in mm
Figure 1
07
Q.3 (a) Enlist the four major components an FMS is comprised of. What is the role
of humans in it?
03
(b) Why are various layout types in FMS made available to choose from?
Enlist the types and draw schematic diagram of any one layout.
04
(c) Write a note on: Automated Storage and Retrieval System (AS/RS). 07
OR
Q.3 (a) Define PLC. Brief about the relay device components used in it. 03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2171903 Date: 03/12/2019
Subject Name: Computer Aided Manufacturing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Abbreviations have usual meaning.
Q.1 (a) Give three points each on advantages and disadvantages of CAM. 03
(b) Draw the CIM wheel to understand basic functions. 04
(c) Explain closed-loop control system used in a CNC system with a schematic
diagram (include its limitation and application). Draw a block diagram of
position control loop for a closed-loop control system.
07
Q.2 (a) What is meant by the term ?group technology?? 03
(b) Brief about ?continuous path control? used in a CNC machine tool system. 04
(c) Explain the ?stick-slip phenomenon? encountered in conventional friction
guideways. How is it overcome with the use of anti-friction guideways?
07
OR
(c) Write an NC part program for drilling three holes in the plate shown in
Figure 1. Work material is a machinable grade of alluminium 10-mm thick.
Specify the cutting tool and describe your procedure for this task. Feed and
cutting speed for the work material are 0.05 mm/rev and 0.37 m/sec
respectively. Show interpretation of each block you write in a remark
column.
Dimensions in mm
Figure 1
07
Q.3 (a) Enlist the four major components an FMS is comprised of. What is the role
of humans in it?
03
(b) Why are various layout types in FMS made available to choose from?
Enlist the types and draw schematic diagram of any one layout.
04
(c) Write a note on: Automated Storage and Retrieval System (AS/RS). 07
OR
Q.3 (a) Define PLC. Brief about the relay device components used in it. 03
2
(b) State points on ?role of management in CAM?. 04
(c) Explain generative type CAPP system using a block diagram. 07
Q.4 (a) In which two categories the actuation systems employed for robots can be
distinguished? State the application area or environment in which each of
these could be used.
03
(b) Enlist the general characteristics of a work-situation which promotes the
use of robots.
04
(c) Describe the methods for programming robots. What are the advantages of
each method?
07
OR
Q.4 (a) Explain the PLC architecture using a diagram. 03
(b) Brief about ?cellular manufacturing?. 04
(c) Provide a comprehensive list of robot specifications with regard to (a)
manipulator and (b) controller.
07
Q.5 (a) What do you understand by MRP-II? What does the acronym ERP stand
for?
03
(b) Draw the structure of an MRP system. 04
(c) Write a note on: Different types of flexibility required in an FMS. 07
OR
Q.5 (a) In block number 80 of a part program a clockwise circular interpolation is
required to the target point (25.40, 12.50, --10.00) with feed rate 150
mm/min and spindle on. Write this block in fixed sequential format, tab
sequential format and word address format. (Coordinates are in
millimeters)
03
(b) Explain with reference to CNC machining: tool nose-radius compensation
is a must for taper- and radius-turning, whereas it is not required while
turning straight cylindrical surface.
04
(c) Elaborate the ?Just in Time? manufacturing philosophy along with its goals.
How could these goals be achieved?
07
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This post was last modified on 20 February 2020