Dies for wire drawing are made of
In wire drawing process, the bright shining surface on the wire is obtained if
Tandem drawing of wires and tubes is necessary because
Match the List-l (Processes) with List-lI (Production of parts):
1. Discrete parts
2. Rod and wire
3. Wide variety of shapes with thin walls
4. Flat plates and sheets
5. Solid and hollow parts
A B C D
(a) 2 5 3 4
(b) 1 2 5 4
(c) 4 1 3 2
(d) 4 1 5 2
The blank diameter used in thread rolling will be
Thread rolling is a cold-forming process in which threads are formed on round rods by passing them between rotating dies.
The reduction in sheet-metal drawing is defined as
D = Blank diameter
d = Punch diameter
Ironing is used to
Thread rolling is restricted to
Match the List-I (Extrusion processes) with List-lI (Related description):
A. Direct extrusion
B. Indirect extrusion
C. Hydrostatic extrusion
D. Tube extrusion
2. No friction
3. Stationary die
4. Moving die
A B C D
(a) 4 2 3 1
(b) 3 2 4 1
(c) 3 4 2 1
(d) 3 4 1 2
Swaging is an operation of
In swaging a solid rod or tube is subjected to radial impact forces by a set of reciprocating dies. The die movements can be obtained by means of a set of rollers in a cage, is an action similar to that of a roller bearing.
Which one of the following is an advantage of forging
Bolt heads are manufactured by
In the forging operation, fullering is done to
Fullering is performed by a pair of concave dies and in this material moves away from the centre this decreases the size of a slab.
Cold shut (lap) may occur in products obtained by:
Identify the process in which the metal is shaped by means of intermittent blows on it
Swaging is generally used for reducing the diameter, or tapering the end of bars and tube through rotating dies.
Which one of the following processes is adopted for manufacturing of steel balls for ball bearing?
Which one of the following metal forming processes in not a high energy forming processes?
In metal forming process, energy source such as chemical, magnetic and electrical discharge can be used. Since in ail such processes, the rate of energy flow is of much higher order, these are commonly called high-energy rate (HER) processes. Three common HER processes are:
1. Explosive forming
2. Electrohydraulic forming
3. Electromagnetic forming
A forging method for reducing the diameter of a bar and in the process making it longer is termed as
The process of coining is
Coining is cold forging operation.
Which of the following manufacturing process will produce strongest component?
Which of the following metals is, best suitable for extrusion either hot or cold?
Collapsible tooth paste tubes are manufactured by
What does hydrostatic pressure in extrusion process improve?
Hydrostatic pressure increases the ductility of the material. Therefore, brittle material can be extruded bv this method.
In the metal extrusion process, when the.die angle increases, the required extrusion force
As the die angle increases, the contact between the die and workpiece decreases which decreases the force required but when the die angle increases beyond a certain value, this creates hinderance in the flow of metal hence force required increases.
Which metal forming process is used for manufacturing of long steel wire?
A floating mandrel is used in
Tube drawing is done by
1. Tube sinking operation
2. Tube drawing with fixed mandrel
3. Tube drawing with floating mandrel
4. Tube drawing with moving mandrel
Blanking and piercing operation can be performed simultaneously in
In compound die, multiple operation can be performed in single stroke and sinaie operation.
Generally washers are made by this method.
In piercing operation shear and clearance is provided on
In piercing or punching punch is exact clearance is provided on die and shear is provided on punch.
In blanking operation the clearance provided is
A sheet of metal is being cut along its length in a straight line such a cutting operation is called