Previous year question paper for MF (M-TECH production engineering 1st)

Plasticity – True stress and true strain, true stress-strain curves, selection of stress-strain curves for

cold and hot working, yield of isotropic plastic material, yield criteria. Tresca maximum sheer-strainenergy

criterion, plastic incompressibility, Poisson’s ratio for plastic deformation flow rule, strain

hardening function, heat generation and heat transfer in metal forming processes, temperatures in

Quasi continuous forming operations. Examination of Metal forming processes. (12 Hours)

Prediction of working loads and maximum deformation analysis of the processes of wire

drawing/tube drawing, strip drawing and extrusion. various parameters/variables affecting the

processes of wire drawing, tube drawing, strip drawing and extrusion; various methods of tube

drawing and their comparison. Working loads for plain strain forging of strip and disc under

conditions of well lubrications and sticking of material with die and under mixed conditions,

prediction of working loads under above approach (simple plain strain and axis symmetric problems)

 (8 Hours)

Lubrication in metal forming processes, principles and mechanism of lubrications, hydrodynamic and

their film lubrication, boundary and extreme pressure lubricants, solid lubricants, lubricants used for

rolling and cold drawing, forging, extrusion and deep drawing processes; defects in various metal

forming processes like rolling, forging, extrusion, wire drawing and deep drawing and their causes

and remedial measures. (8 Hours)

Theory and deep drawing of circular blanks, analysis of the process, prediction of radial stress and

punch load, ironing, wrinkling, blank holding and various parameters/variables affecting the deep

drawing process. (6 Hours)

Rolling : Classification of rolling mills, analysis of the process. Prediction of roll pressure for flat

strip rolling in the leading and lagging zones, roll separating forces, torque on the roll, affect of front

and back tensions, affect of support rolls, various factors which affect rolling force. (6 Hours)