Fundamentals of Modern Manufacturing, Binder Ready Version: Materials, Processes, and Systems
6th Edition
ISBN: 9781119128694
Author: Mikell P. Groover
Publisher: WILEY
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Chapter 13, Problem 1RQ
To determine
The reasons why plastic shaping processes are important.
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Explanation of Solution
Plastic shaping processes include properties of polymer melts, injection molding, compression etc. The major importance is that unlimited types of part geometries are possible. Moreover, the molding is the net shape process. No further shaping is required.
Minimum energy is required required to process plastics than metals due to much lower processing temperatures. As a result of lower temperature, handling of the product is easier. Paiting and finishing processes like plating is not required.
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motor supplies 200 kW at 6 Hz to flange A of the shaft shown in Figure. Gear B transfers 125 W of power to operating machinery in the factory, and the remaining power in the shaft is mansferred by gear D. Shafts (1) and (2) are solid aluminum (G = 28 GPa) shafts that have the same diameter and an allowable shear stress of t= 40 MPa. Shaft (3) is a solid steel (G = 80 GPa) shaft with an allowable shear stress of t = 55 MPa. Determine:
a) the minimum permissible diameter for aluminum shafts (1) and (2)
b) the minimum permissible diameter for steel shaft (3).
c) the rotation angle of gear D with respect to flange A if the shafts have the minimum permissible diameters as determined in (a) and (b).
Chapter 13 Solutions
Fundamentals of Modern Manufacturing, Binder Ready Version: Materials, Processes, and Systems
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