400 mm OD Design A: 400 mm OD Design B: 75 kg 75 kg
Precision Machining Technology (MindTap Course List)
2nd Edition
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Chapter8: Computer Numerical Control
Section8.4: Cnc Turning: Setup And Operation
Problem 2RQ: MDI stands for _________ ___________ ________.
Question
A system is being designed to lift objects with a cable. One end of the cableDesign A:
Design B:
will be attached to the material while the other end will be permanently fixed to a drum (cylinder)
so that as the drum is rotated the cable is wound around its outside surface. Two designs for a drum
are being considered for use in the system. Design “A” calls for a solid aluminum pulley ( palluminium = 2800 kg/m 3 ) while design “B” calls for a steel pulley (psteel= 8000 kg/m 3 ) that is
hollow (it can be modeled as a 12 mm thick shell). Calculate the torque required to accelerate the
pulley for Design A to reach 500 RPM in 4 seconds if the pulley is 500 mm wide. Assume constant
alpha
Transcribed Image Text:400 mm OD
Design A:
400 mm OD
Design B:
75 kg
75 kg
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