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Posted Date: 13 Nov 2009 Posted By: Pujitha Member Level: Silver
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2008 KLE University B.Tech Industrial Production Engineering Manufacturing Science & Technology Question paper
UNIT-I
1.(a) Explain the geometry of single point cutting as per orthogonal Rake system. [Marks 6]
(b) Explain Merchant's circle diagram with a neat sketch. [Marks 6]
(OR)
2.(a) Sketch the geometry of a twist drill and explain the influence of drill angles on its performance. [Marks 8]
(b) Differentiate between orthogonal and oblique cutting operations. [Marks 4]
UNIT-II
3.(a) Explain any one of the experimental techniques for measuring tool temperature. [Marks 6]
(b) During machining of C-20 steel in a orthogonal cutting, the following data were obtained.Chip thickness ratio 0.47, tangential cutting force 850N, thrust force = 150N and rake angle of the tool is 12°.
Calculate:(i) Shear force (ii) Coefficient of friction. [Marks 6]
(OR)
4.(a) What are the various chip-breaking methods used in practice? Mention their relative advantages. [Marks 6]
(b) What are the sources of heat generation in metal cutting? [Marks 6]
UNIT-III
5.(a) What are the desirable properties of cutting fluids?Explain water soluble coolants?[Marks 6]
(b) What are the various tool wear mechanisms?Explain with neat sketches. [Marks 6]
(OR)
6.(a) How the cutting fluids are selected and applied in various operations and on various materials? [Marks 6]
(b) Define machinability. Discuss machinability index of metals. [Marks 6]
UNIT-IV
7.(a) Define tool life and state the variables effecting tool life. [Marks 6]
(b) Explain the measurement of cutting forces in plain milling forces. [Marks 6]
(OR)
8. How can the cutting forces be estimated in
(i)turning (ii)drilling (iii)plain milling [Marks 12]
UNIT-V
9. Discuss the relative characteristics of the following tool materials.
(i)Carbides (ii)Ceramics (iii)H.S.S. (iv)Diamond [Marks 12]
(OR)
10.(a)What are the desirable properties of cutting tool materials?
(b)Write short note on the following:
(i)Carbon steels (ii)High speed steels
(iii)Diamond (iv)Coated Carbides [Marks 12]
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