EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Chapter 36, Problem 19QLP
To determine
What is the consequence of setting lower and upperspecifications closer to the peak of the curve in Fig. 36.4?
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A cylindrical workpiece of 100mm diameter and 150mm in height (Fig. 1) is upset (open
die forged) at 1200° C to 100mm height disk (Fig. 2). Material of the workpiece is low
carbon steel. A graphite lubricant reduces the friction to u=0.25. A press with 2-m/sec
speeds is used to make this part. At 1200° C the material has the values for its
C=48MPA and m=0.08
parameters
Fig. 1 Height=150mm, Diameter=100mm
Fig. 2 Height = 100mm, Diamete =
?
mm
(a)
(b)
(c)
Determine the final diameter of the disk (see Fig. 2)
Determine the true strain rate at the end of process.
Calculate the flow stress at the end of the stroke.
The symmetrical cup workpiece shown in Fig. P. 6.10.2 is to
be made from cold rolled steel 0.8 mm thick. Make the
necessary calculations for designing the drawing die for this
part.
50
0.8
50
1.6R
2) Drawing: A round rod of annealed 302 stainless steel (K = 1300 MPa and n = 0.3) is being drawn
from a diameter of 15 mm to a diameter of 12 mm at a speed 0.25 m/s, using a semidie angle of 8º.
a. Calculate the percentage reduction, the applied force due to ideal deformation, friction, and
inhomogeneous deformation. Assume coefficient of friction of 0.1.
b. Calculate the required power, process efficiency, and the die pressure at the exit.
Chapter 36 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 36 - Define the terms sample size, random sampling,...Ch. 36 - What are chance variations?Ch. 36 - Prob. 3RQCh. 36 - Define standard deviation. Why is it important...Ch. 36 - Describe what is meant by statistical process...Ch. 36 - When is a process out of control? Explain.Ch. 36 - Explain why control charts are developed. How...Ch. 36 - What is a loss function? How is it used?Ch. 36 - What do control limits indicate?Ch. 36 - Prob. 10RQ
Ch. 36 - What is acceptance sampling? Why was it developed?Ch. 36 - Prob. 12RQCh. 36 - What is meant by six-sigma quality?Ch. 36 - Prob. 14RQCh. 36 - Prob. 15RQCh. 36 - Give three methods of nondestructive testing...Ch. 36 - Explain why major efforts are continually being...Ch. 36 - Prob. 18QLPCh. 36 - Prob. 19QLPCh. 36 - Prob. 20QLPCh. 36 - Prob. 21QLPCh. 36 - Prob. 22QLPCh. 36 - What are the advantages of automated...Ch. 36 - Prob. 24QLPCh. 36 - Prob. 25QLPCh. 36 - Explain why GO and NOT GO gages (see Section...Ch. 36 - Prob. 27QLPCh. 36 - Prob. 28QLPCh. 36 - Prob. 29QLPCh. 36 - Prob. 31QLPCh. 36 - Beverage-can manufacturers try to achieve failure...Ch. 36 - Assume that in Example 36.3 the number of samples...Ch. 36 - Calculate the control limits for averages and...Ch. 36 - Calculate the control limits for (a) number of...Ch. 36 - In an inspection with a sample size of 12 and a...Ch. 36 - Prob. 37QTPCh. 36 - The average of averages of a number of samples of...Ch. 36 - Prob. 39QTPCh. 36 - Prob. 40QTPCh. 36 - Prob. 41SDPCh. 36 - Describe your thought on whether products should...Ch. 36 - Prob. 44SDPCh. 36 - Prob. 45SDPCh. 36 - Prob. 46SDPCh. 36 - Prob. 47SDPCh. 36 - Prob. 48SDPCh. 36 - Many components of products have a minimal effect...
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