Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 2182503 Design Of Product And Machine Tools Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182503 Date:09/05/2019
Subject Name:Design of Product and Machine Tools
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. Design Data book is permitted.
MARKS
Q.1 (a) Why feed box with gear cone with sliding key is not suitable for
heavy duty lathe machine?
03
(b) Name the Devices used for intermittent motion. Explain Geneva
Mechanism in detail.
04
(c) Explain various Elementary transmission methods for
Transforming rotary motion into Translatory.
07
Q.2 (a) Discuss various properties of Materials used for sliding contact
bearing.
03
(b) State the functions and requirements of the spindle unit along with
the materials.
04
(c) With neat sketch explain following gear box:
(1) Feed box with tumbler gear (2) Feed box with change gear
07
OR
(c) Design hydrodynamic journal bearing for a shaft of blower for
following data:
Bearing Load due to belt force: 3000N, Bearing Load due to
weight of rotor: 600N, Speed of Blower: 600 rpm, diameter of
shaft: 50 mm, Expected temperature of oil:70?, ambient
temperature: 30?, c/d ratio - 0.0015, Minimum film thickness:
0.019 mm
Calculate: actual attitude, type of oil used, power loss, heat
generated, actual minimum film thickness.
07
Q.3 (a) Discuss various methods to improve dynamic stiffness of machine
tools.
03
(b) Discuss various types of Bed structure and wall arrangements and
their applications with neat sketch.
04
(c) Explain the design procedure of Slideways for wear resistance. 07
OR
Q.3 (a) Why it is important to adjust the clearance in slide ways? 03
(b) Write a note on Antifriction Guideways. 04
(c) Give requirement of Protecting devices for slide ways and explain
various types of protecting devices with neat sketch.
07
Q.4 (a) What do you understand by 6 ? 37 rope? Explain with neat sketch. 03
(b) How does the design of sheave and pulley differ? 04
(c) Find the diameter of rope required for an overhead travelling crane
with lifting magnet. Take, Lifting capacity: 5000 kg, Weight
lifting magnet = 2000 kg, weight lifting tackle = 120 kg, Lifting
height = 8 meters, No of Rope parts = 4Take Dmin/d = 23,
dw=0.045, Er=8*10
4
N/mm
2
, ?u= 1500 N/mm
2
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182503 Date:09/05/2019
Subject Name:Design of Product and Machine Tools
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. Design Data book is permitted.
MARKS
Q.1 (a) Why feed box with gear cone with sliding key is not suitable for
heavy duty lathe machine?
03
(b) Name the Devices used for intermittent motion. Explain Geneva
Mechanism in detail.
04
(c) Explain various Elementary transmission methods for
Transforming rotary motion into Translatory.
07
Q.2 (a) Discuss various properties of Materials used for sliding contact
bearing.
03
(b) State the functions and requirements of the spindle unit along with
the materials.
04
(c) With neat sketch explain following gear box:
(1) Feed box with tumbler gear (2) Feed box with change gear
07
OR
(c) Design hydrodynamic journal bearing for a shaft of blower for
following data:
Bearing Load due to belt force: 3000N, Bearing Load due to
weight of rotor: 600N, Speed of Blower: 600 rpm, diameter of
shaft: 50 mm, Expected temperature of oil:70?, ambient
temperature: 30?, c/d ratio - 0.0015, Minimum film thickness:
0.019 mm
Calculate: actual attitude, type of oil used, power loss, heat
generated, actual minimum film thickness.
07
Q.3 (a) Discuss various methods to improve dynamic stiffness of machine
tools.
03
(b) Discuss various types of Bed structure and wall arrangements and
their applications with neat sketch.
04
(c) Explain the design procedure of Slideways for wear resistance. 07
OR
Q.3 (a) Why it is important to adjust the clearance in slide ways? 03
(b) Write a note on Antifriction Guideways. 04
(c) Give requirement of Protecting devices for slide ways and explain
various types of protecting devices with neat sketch.
07
Q.4 (a) What do you understand by 6 ? 37 rope? Explain with neat sketch. 03
(b) How does the design of sheave and pulley differ? 04
(c) Find the diameter of rope required for an overhead travelling crane
with lifting magnet. Take, Lifting capacity: 5000 kg, Weight
lifting magnet = 2000 kg, weight lifting tackle = 120 kg, Lifting
height = 8 meters, No of Rope parts = 4Take Dmin/d = 23,
dw=0.045, Er=8*10
4
N/mm
2
, ?u= 1500 N/mm
2
07
2
OR
Q.4 (a) Will you prefer a cast hook or forged hook in cranes? Give reason. 03
(b) Draw diagram of material handling system with rope bending
diagram for multiple crane pulley having 3 and 6 bends.
04
(c) Design the crane hook for the lifting capacity of 10 tonnes, having
triangular section. Take permissible tensile stress 120 N/mm
2
for
forged steel.
07
Q.5 (a) Discuss the role of Aesthetics in Product design. 03
(b) Discuss product design in a viewpoint of:
(1) Designer, (2) Customer
04
(c) Discuss the importance of selection of proper tolerance for part
dimensions.
07
OR
Q.5 (a) Discuss following in brief:
1. Value Engineering 2. Consumer Quality level
03
(b) Discuss the importance of CAD in developing the products. 04
(c) Comment on the statement "A Design needs sound knowledge of
Manufacturing technology and machine tools"
07
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This post was last modified on 20 February 2020