A flywheel is to be fitted on a punching machine with 73% mechanical efficiency. The machine makes 20 working strokes per minute. The holes are 20-mm diameter, thickness of 12 mm steel plates with an ultimate shear strength of 330 MPa. The punching operation takes place during 1/9th of a revolution of the crankshaft. Determine the capacity (kW) of a driving motor necessary to operate a punching machine.

A flywheel is to be fitted on a punching machine with 73% mechanical efficiency. The machine makes 20 working strokes per minute. The holes are 20-mm diameter, thickness of 12 mm steel plates with an ultimate shear strength of 330 MPa. The punching operation takes place during 1/9th of a revolution of the crankshaft. Determine the capacity (kW) of a driving motor necessary to operate a punching machine.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter3: Torsion

Section: Chapter Questions

Problem 3.3.12P: A propeller shaft for a small yacht is made of a solid steel bar 104 mm in diameter. The allowable...

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