Question:-
Which one is not a method of reducing cutting forces to prevent the overloading of press?
Option (A)
Providing shear on die
Option (B)
Providing shear on punch
Option(C)
Increasing die clearance
Option(D)
Stepping punches
Correct Option:
(C)
Question Solution:
Provision of shear distorts the material being cut. When shear is on the face of the punch, the blank can’t be flat and when shear is on the die, the piercing can’t be flat. So for reducing cutting forces to prevent overloading of press, for blanking operation shear is provided on the die face and for punching or piercing operation shear is provided on the punch face. As shown in figure. Angle of inclination of die face with horizontal plane is called ‘shear’

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