A press is used to punch 10 holes per minute of 30 mm diameter hole from 25 mm thick plate. Determine the power needed to punch a hole if ultimate shear stress is 400 Mpa. Determine the following: The...

 A press is used to punch 10 holes per minute of 30 mm diameter hole from 25 mm thick plate. Determine the power needed to punch a hole if ultimate shear stress is 400 Mpa. Determine the following: The maximum force required to punch a hole, kN  The power required to drive the press, kW