Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 21, Problem 66QTP
To determine
Estimate the cutting temperature for the conditions of Problem 21.65 if the following properties apply.
| Workpiece material | ||
| Aluminium | Steel | |
| Chip energy | 1320 | 2740 |
| Thermal diffusivity | 97 | 14 |
| Volumetric specific heat, | 2.6 | 3.3 |
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Students have asked these similar questions
1. Most common instrument used
in the mechanical gages is the dial
indicator, which of the following
applications cannot be measured by
the dial indicator?
(a) All of them
(b) Perpendicularity
(c) Runout
(d) Circularity
(e) Roughness
2. The main mechanism for the flank
wear on the single point cutting tool is:
(a) Oxidation wear
(b) Adhesion wear
(c) None of them
(d) Diffusion wear
(e) Plastic deformation
3. Higher cutting speeds and
temperatures are the main mechanism
of the following tool wear mechanism:
(a) Diffusion wear
(b) Abrasion wear
(c) None of them
(d) Adhesion wear
(e) Plastic Deformation
Q2:- Tool life tests in turning yield the following data: (1) v = 100 m/min, T = 10 min; (2) v = 75 m/min,
T = 30 min. (a) Determine the n and C values in the Taylor tool life equation. Based on your
equation, compute (b) the tool life for a speed of 90 m/min, and (c) the speed corresponding to a
tool life of 20 min
Q3:- In an orthogonal cutting operation, the tool has a rake angle = 15°. The chip thickness before the cut =
0.30 mm and the cut yields a deformed chip thickness = 0.65s mm. Calculate (a) the shear plane angle and (b)
the shear strain for the operation. Suppose the rake angle were changed to a= 0°. Assuming that the friction
angle remains the same, determine (a) the shear plane angle, (b) the chip thickness, and (c) the shear strain for
the operation.
P: For a certain job, the cost of metal cutting is
7 180 C/V and the cost of tooling is 270C/(TV),
where Cis a constant, Vis the cutting speed in
m/min and T is the tool life in minutes. The
Taylor's tool life equation is VTO.25 = 150. The
cutting speed ( in m/min) for the minimum total
cost is
%3D
Chapter 21 Solutions
Manufacturing Engineering & Technology
Ch. 21 - Explain why continuous chips are not necessarily...Ch. 21 - Name the factors that contribute to the formation...Ch. 21 - What is the cutting ratio? Is it always less than...Ch. 21 - Explain the difference between positive and...Ch. 21 - Explain how a dull tool can lead to negative rake...Ch. 21 - Comment on the role and importance relief angle.Ch. 21 - Explain the difference between discontinuous chips...Ch. 21 - Why should we be interested in the magnitude of...Ch. 21 - What are the differences between orthogonal and...Ch. 21 - What is a BUE? Why does it form?
Ch. 21 - Is there any advantage to having a built-up edge...Ch. 21 - What is the function of chip breakers? How do they...Ch. 21 - Identify the forces involved in a cutting...Ch. 21 - Explain the characteristics of different types of...Ch. 21 - List the factors that contribute to poor surface...Ch. 21 - Explain what is meant by the term machinability...Ch. 21 - What is shaving in machining? When would it be...Ch. 21 - List reasons that machining operations may be...Ch. 21 - Are the locations of maximum temperature and...Ch. 21 - Is material ductility important for machinability?...Ch. 21 - Explain why studying the types of chips produced...Ch. 21 - Prob. 22QLPCh. 21 - Tool life can be almost infinite at low cutting...Ch. 21 - Explain the consequences of allowing temperatures...Ch. 21 - The cutting force increases with the depth of cut...Ch. 21 - Why is it not always advisable to increase the...Ch. 21 - What are the consequences if a cutting tool chips?Ch. 21 - What are the effects of performing a cutting...Ch. 21 - Prob. 29QLPCh. 21 - Prob. 30QLPCh. 21 - Prob. 31QLPCh. 21 - Prob. 32QLPCh. 21 - Comment on your observations regarding Figs. 21.1...Ch. 21 - Prob. 34QLPCh. 21 - Comment on your observations regarding the...Ch. 21 - Why does the temperature in cutting depend on the...Ch. 21 - You will note that the values of a and b in Eq....Ch. 21 - Prob. 38QLPCh. 21 - Prob. 39QLPCh. 21 - Explain whether it is desirable to have a high or...Ch. 21 - The Taylor tool-life equation is directly...Ch. 21 - Prob. 42QLPCh. 21 - Why are tool temperatures low at low cutting...Ch. 21 - Can high-speed machining be performed without the...Ch. 21 - Prob. 45QLPCh. 21 - Prob. 46QLPCh. 21 - State whether or not the following statements are...Ch. 21 - Let n = 0.5 and C = 400 in the Taylor equation for...Ch. 21 - Assume that, in orthogonal cutting, the rake angle...Ch. 21 - Prob. 50QTPCh. 21 - Prob. 51QTPCh. 21 - Using trigonometric relationships, derive an...Ch. 21 - An orthogonal cutting operation is being carried...Ch. 21 - Prob. 54QTPCh. 21 - Prob. 55QTPCh. 21 - Prob. 56QTPCh. 21 - Show that, for the same shear angle, there are two...Ch. 21 - With appropriate diagrams, show how the use of a...Ch. 21 - In a cutting operation using a 5 rake angle, the...Ch. 21 - For a turning operation using a ceramic cutting...Ch. 21 - In Example 21.3, if the cutting speed V is...Ch. 21 - Using Eq. (21.30), select an appropriate feed for...Ch. 21 - With a carbide tool, the temperature in a cutting...Ch. 21 - The following flank wear data were collected in a...Ch. 21 - The following data are available from orthogonal...Ch. 21 - Prob. 66QTPCh. 21 - Design an experimental setup whereby orthogonal...Ch. 21 - Describe your thoughts on whether chips produced...Ch. 21 - Recall that cutting tools can be designed so that...Ch. 21 - Recall that the chip-formation mechanism also can...Ch. 21 - Prob. 73SDPCh. 21 - Describe your thoughts regarding the recycling of...Ch. 21 - List products that can be directly produced from...Ch. 21 - Obtain a wood planer and some wood specimens. Show...Ch. 21 - It has been noted that the chips from certain...Ch. 21 - As we have seen, chips carry away the majority of...
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