DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 40, Problem 1P
Develop a sequence of operations to produce the pail shown in Figure -10.A, from a casting. The part is shown in a drilling fixture that is going into a NC milling machine.
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2. Write a complete program to mill around the part. The endmill is .500 diameter, and you
want to leave .010 stock for a finish pass. Enter a diameter offset number (Dn) command for tool
DIAMETER Geometry of .520 for machining a roughing pass around part. And then define
another pass around part using the same program coordinates but a different diameter offset
number (Dn), and enter in the correct diameter offset value of .500 to machine part to the finish
size. TOOL 1 has 0.520 in D21 and 0.500 in D01
Tool
Speed (rpm)
Feed (ipm)
Operation
Finish outside contour, x .50 deep
Tooling
1
.5D endmill
1200
6.
25
R.25 2 PL.
R .50
2.00
XO YO
4.0 SO.
1.0 SQ.
5 DA. EM
1.250-
X-2.5 Y-2.0 START POINT
1. If a machinist wanted to drill a % inch hole in a piece of machine steel using a high speed steel
drill. At what speed in revolutions per minute should he operate the drill press?
2. Find the revolutions per minute of an 8 mm drill if it is used to cut an aluminum workpiece using
a high carbon steel drill.
3. The rpm setting of the drill press is set to 600 rpm. What is the maximum diameter in inches of a
high speed drill if it is used to drill a tool steel material?
4. A drill press has the following rpm settings; 350, 600, 1100, & 1600. What rpm setting must be
used if a 15 mm high speed steel drill is used to cut brass workpiece?
5.
A machine operator drills a hole of a 3/8 inch diameter to a stainless steel using a carbon steel
drill. He sets the drill press rpm setting to 900 rpm. Is he operating at correct setting? If not,
then what must be the correct rpm setting considering that the machine has the following rpm
settings of 300, 600, 900, 1200, and 1800?
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Chapter 40 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 40 - What are the two primary functions of a...Ch. 40 - Prob. 2RQCh. 40 - An early treatise defined a jig as a device that...Ch. 40 - Does an ordinary vise qualify as a fixture? Why or...Ch. 40 - What basic criteria should be considered in...Ch. 40 - In any part drawing, what are the critical...Ch. 40 - What difficulties can result from not keeping...Ch. 40 - Prob. 8RQCh. 40 - Which of the basic design principles relating to...Ch. 40 - What are the two reasons for not having drill...
Ch. 40 - Why does the use of down milling often make it...Ch. 40 - Prob. 12RQCh. 40 - A large assembly jig for an airplane-wing...Ch. 40 - Explain why the use of a given fixture may not be...Ch. 40 - Prob. 15RQCh. 40 - In the clamps shown in Figure 40.20, what is the...Ch. 40 - What are other common types of clamp?Ch. 40 - What is the purpose of dimensioning the...Ch. 40 - Prob. 19RQCh. 40 - In Figure 49.9. why arent there three points put...Ch. 40 - Which set of locators in Figure 49.9 establishes...Ch. 40 - What are the four stages of the SMED methodology...Ch. 40 - Prob. 23RQCh. 40 - How could the intermediate jig concept be used in...Ch. 40 - Develop a sequence of operations to produce the...Ch. 40 - Suppose in the sample problem at the end of this...Ch. 40 - Notice that the holes in the part in Figure 49.9...Ch. 40 - Prob. 6PCh. 40 - A part has two holes located for drilling by...
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