Forming Questions Set 11:
How many dies are used in a reciprocating flat die machine?
Solution:
What is the dimensional accuracy in powder metallurgy?
Solution:
The typical temperature range for brazing is:
Solution:
Thread rolling is restricted to which type of materials?
Solution:
Bending is preferred along the direction of the flow of grains.
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A 10 mm deep cylindrical cup with diameter of 15 mm is drawn from a circular blank. Neglecting the variation in the sheet thickness, the diameter (up to 2 decimal points accuracy) of the blank is mm.
Solution:
Stretch forming is used for producing bent sheets without any local buckling and wrinkling. This is achieved by keeping the metal strip under _______ during the operation.
Solution:
For 50% penetration of work material, a punch with single shear equal to thickness will:
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Which of the following statements about the shearing operation are false?
Solution:
Consider the following data for a billet passed through a die hole in an extrusion process:
e = Maximum strain during the extrusion process = 1 mm
n = Exponent constant = 3
k = Constant = 4
Initial area of billet = 12 m2
Uniform cross-sectional area of die hole = 6 m2
The expression for average flow stress (Yf) is:
Yf = k * en / (1 + n)
and, loge A = ln A
What is the ram pressure required to extrude the billet through the die hole?
Solution:
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