A punching press is required to punch 40 mm diameter holes in a plate of 15 mm thickness at the rate of 30 holes per min
Posted: Tue Jul 12, 2022 8:58 am
A punching press is required to punch 40 mm diameter holes in aplate of 15 mm thickness at the rate of 30 holes per minute. Itrequires 6 N-m of energy per mm2 of sheared area. Determine themoment of inertia of the flywheel if the punching takes one-tenthof a second and the rpm of the flywheel varies from 160 to 140.