DeGarmo's Materials and Processes in Manufacturing
DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 24, Problem 17RQ

Explain how controlled movements of the work m three mutually perpendicular directions are obtained m column-and-knee-type milling machines.

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Determine the machining time for plain milling a rectangular surface of length 100 mm and width 50 mm by a helical fluted plain HSS milling cutter of diameter 50 mm, length 75 mm and 10 teeth. Assume A = O = 5 mm, VC = 40 m/min and so = 0.1 mm/tooth.
H.W. The face milling cutter of D= 200 mm used to cut a block which is 200 mm = H, 1=480 mm, if f= 0.7 mm/rev is used and the overrun of the cutter is 12 mm and cutting speed 320 mm/min. Calculate the machining time.
thickness is HW3.A block of steel has a length L-600mm and a width W-450mm. The Machined 10mm, once by Peripheral Milling and once by planing Machine.Calculate :Machining time for each operation if you know the following For peripheral milling: cutting speed V =80 m/min, Feed f-0.15mm/rev, the cutter .1 diameter D =50 mm with five teeth and depth of cut d =3mm For planing: clearance on both sides c =25mm, cutting speed V =36.56 m/min, retum to .2 cutting ratio m =0.25, feed f=5 mm/stroke and depth of cut d =5 mm .Calculate Material removal rate in both processes .3 Solution

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DeGarmo's Materials and Processes in Manufacturing

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