Anna University Model Question Paper www.annauniv.edu : Production Engineering

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MODEL QUESTION PAPER
PRODUCTION ENGINEERING, VI SEMESTER
PR340 THEORY OF METAL CUTTING

TIME – 3 HRS MAXIMUM : 100 Marks

http://www.annauniv.edu/academic/qp4.htm
www.annauniv.edu/academic/mqp6sem-ug/pr340.doc

PART – A (10 x 2 = 20 Marks)
ANSWER ALL QUESTIONS

1.List out the types of chips?
2.What is the function of chip breakers?
3.What is Built-Up-Edge?
4.Write the expression for shear angle with respect to and rake angle and chip thickness coefficient?
5.Sketch the forces during turning.
6.What are the requirements of a dynamometer for measuring forces in cutting?
7.What are the sources of heat generation in machining?
8.State the important functions of cutting fluids.
9.Define machinability.
10.What is crater wear?

PART – B (5 x 16 = 80 Marks)

11.During the machining of mild steel with 0? – 10? – 8? – 8? – 90? – 2 mm ORS shaped carbide tool, the following observations were made.
Depth of cut = 2.0 mm; feed = 0.2 mm / rev; cutting speed = 150m / min;
chip thickness = 0.4 mm; tangential force = 320 N; axial force = 170 N.
Calculate
(i)Shear force and normal force on shear plane (5)
(ii) Friction force and normal force on rake face (5)
(iii)Kinetic coefficient of friction and (3)
(iv)Specific energy in cutting (3)

12.a)(i) Sketch the nomenclature of tool in American System. (8)
(ii) Sketch the plain milling cutter and label its nomenclature. (8)
( OR )
b) Calculate : (i) orthogonal rake, (ii) inclination angle and
(iii) normal rake of a cutting tool having side rake (-10? ),
back rake (-5?) and side cutting edge angle of 30? . Sketch
the above geometries for the tool. (16)