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May Jun 2016.pdf
May_Jun_2016.pdf
Showing 1-2 out of 2
May Jun 2016.pdf-SECTION - I Q1) Explain with
May_Jun_2016.pdf-SECTION - I Q1) Explain with
May Jun 2016.pdf-SECTION - I Q1) Ex...
May_Jun_2016.pdf-SECTION - I Q1) Explain with
Page 1
SECTION - I
Q1)
Explain with any one practical example why geometric progreassion is used in
machine tool drive speed regulation.
[10]
OR
Q2)
Explain the design procedure of speed gear box for spindle drive by considering
all safety factors.
[10]
Q3)
a)
A bed subjected to torsional loading is constructed as a closed box type
structure, while a bed subjected to bending is constructed as I-section
Why?
[2]
b)
Explain static and dynamic stiffness in machine tool structures.
[8]
OR
Q4)
With the schematic, explain the stress analysis of Lathe Bed.
[10]
Q5)
a)
Discuss the functions and types of guide-ways.
[5]
b)
What is stick-slip motion in slide-ways. Explain.
[5]
OR
Total No. of Questions : 12]
[Total No. of Pages
: 2
[4959]-1037
B.E. (Mechanical)
(D) : MACHINE TOOL DESIGN
(2012 Pattern)
Time : 2½ Hours]
[Max. Marks :
70
Instructions to the candidates:-
1)
Neat diagrams must be drawn wherever necessary.
2)
Assume suitable data, if necessary.
3)
Figures to the right indicate full marks.
4)
Use of non-programmable electronic calculators is allowed.
P4904
SEAT No. :
P.T.O.
Page 2
[4959]-1037
2
Q6)
Explain the design criteria and calculations of any one slide-ways.
[10]
SECTION - II
Q7)
a)
Discuss the different factors for the design of sliding friction power
screws.
[6]
b)
Describe with neat sketch spindle unit of a milling machine.
[6]
OR
Q8)
a)
Explain the methods of preloading of antifriction bearings.
[6]
b)
Explain why the distribution of load over the threads is uniform in a ball
lead screw in comparison with sliding friction lead screw.
[6]
Q9)
With the help of block diagram, explain the experimental method for
determination of dynamic characteristic of equivalent elastic system.
[12]
OR
Q10)
Explain the effect of forced vibration due to perturbance of the cutting process
on machine tools.
[12]
Q11)
a)
Explain retrofitting with reference to Lathe machine.
[8]
b)
Discuss the design considerations for step-less drive.
[8]
OR
Q12)
a)
With the help of applications, explain recent trends in machine tools.
[8]
b)
Explain the ergonomics considerations applied to the design of control
members and location of displays.
[8]
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