A machine punching 38 mm holes in 32 mm thick plate requires 7 N-m of energy per sq. mm of sheared area, find the maximum shear force required.

Related MCQs

• The maximum shear force required for punching depends on  
• Calculate the work done per minute by a punch tool making 20 working strokes per min when a 30 mm diametre hole is punched in 5 mm thick plate with ultimate shear strength og 450 Mpa in each stroke.
• In a punching press, load is 0 at the time of punching.
• Energy during actual punching operation is same as the energy supplied by the motor.
• The balance energy required for punching is supplied by the flywheel by  
• When a periodic disturbing force is applied to a machine, the force is transmitted to the foundation by the means of spring.
• In a punching press, which of the following quantity is constant?
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