STUPIDSID
1 (a)
How the metal working processes are clasified? Explain.
6 M
1 (b)
Define re-crystallization. Distinguish hot working from cold working.
6 M
1 (c)
Derive an expression for the following with respect to yield criteria for ductile material:
i) Von-Mises or distortion energy criteria
ii)Fresca or maximum shear stress criteria.
i) Von-Mises or distortion energy criteria
ii)Fresca or maximum shear stress criteria.
8 M
2
Explain the following parameter which affects the metal working process:
i)temperature ii) strain rate effects
iii) hydrostatic pressure iv) deformation zone geometry
i)temperature ii) strain rate effects
iii) hydrostatic pressure iv) deformation zone geometry
20 M
3 (a)
Explain with sketch the procedural steps involved in forging operation.
6 M
3 (b)
A solid cylindrical slug made of stainless steel is 150 mm diameter and 100 mm height. It is reduced in height by 50% at room temperature by open die forging with flat dies. Assume \mu as 0.2 and flow stress as 1000MPa, calculate forging force at the end of the stroke.
6 M
3 (c)
Derive an expression for slab analysis to determine the mean pressure for closed die forging.
8 M
4 (a)
Explain with sketch any three types of rolling mills
9 M
4 (b)
Derive an expression to determine the roll force and power required in rolling operation.
6 M
4 (c)
Determine the maximum possible reduction for cold rolling a 300mm slab when \mu is 0.08 and the roll diameter is 600 mm. What is the maximum reduction on the same mill for hot rolling when \mu is 0.5?
5 M
5 (a)
Explain with sketch the wire drawing and rod drawing operations.
8 M
5 (b)
Determine the drawing stress to produce 20% reduction in a 10 mm stainless steel wire. The mean flow stress \bar{sigma } is given as 637 Mpa. The die angle is 12° and the \mu is 0.09. Also determine the power required to draw when the wire is moving through the die at 3m/sec.
6 M
5 (c)
Explain with sketch any two methods of tube drawing
6 M
6 (a)
Explain with sketch the direct extrusion and indirect extrusion processes.
6 M
6 (b)
Explain with sketch the following extrusion process.
i) Cold extrusion ii) Hydrostatic extrusion and iii)Impact extrusion
i) Cold extrusion ii) Hydrostatic extrusion and iii)Impact extrusion
9 M
6 (c)
Explain in detail the deformation, lubrication and defects in extrusion.
5 M
7 (a)
Explain with sketch the progressive die and combination die in sheet metal formatting.
6 M
7 (b)
Explain with sketch the following operations in sheet metal forming:
i)Deep drawing ii) Stretch forming iii) Rubber press forming.
i)Deep drawing ii) Stretch forming iii) Rubber press forming.
9 M
7 (c)
Mention defects in sheet metal formed parts.
5 M
8 (a)
Explain with sketch the following high energy rate forming methods:
i) Explosive forming ii) Elctro hydraulic forming iii) Electromagnetic forming.
i) Explosive forming ii) Elctro hydraulic forming iii) Electromagnetic forming.
12 M
8 (b)
Expalin different steps in powder metallurgy process.
8 M
More question papers from Manufacturing Process 3