Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 40, Problem 7P
A part has two holes located for drilling by manual layout. If a drill jig is used. 0.5 min in processing time is saved for each piece. The labor rate is $9/hr. The overhead rate on the labor saved is 100%. Setup time is no more with than without the jig. The combined rate for interest, insurance, taxes, and maintenance is 35%. The cost of the jig is $500.
- How many pieces must be made in one lot to make the jig worthwhile?
- How many pieces must be made on the jig in one lot each month to earn the cost of the jig in 2 years?
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please solve fast.
Explain Method of Sections in details.
Q1. a. Define a machine tool and list all four functions.
b. List all the classifications of machine tools.
c. List all four methods of generating a surface.
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
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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