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 22, Problem 4P
The following data have been obtained for machining a Si-AI alloy:
Compute the C and n values for the Taylor tool life equation. How do these n values compare to the typical values?
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(a) A turning operation is performed on a 660 mm cylindrical part of a certain alloy. The work
material has a length of 140 mm as shown in Figure Q3-1. The finished (produced) part is
shown in Figure Q3-2 which has an overall length of 100 mm. The remaining part of the raw
material length is kept as a gripped part on the turning machine chuck. The cutting data is
shown in Table Q3(a). Apply engineering calculations on the given metal cutting operations,
Table Q3(a)
Depth of cut
Feed
2.5mm
0.15mm/rev
Cutting Speed
Rake angle
The chip thickness after cut
Shear strength
40m/min
50
0.17mm
280 MPa
(i) Shear force.
(ii) Coefficient of friction. e
(iii) Cutting force.
(iv) Time required to cut the part
(v) Rate of material removal.
50mm
$60mm
-20mm
60 mm
140 mm
40 mm
Figure Q3-1
Figure Q3-2
4
1
+
DRG
Ans
Realm ?
Ran
x10*
Red hardness, and important property of many tool steals, is the ability of a tool steel to retain its mechanical and other desired properties at elevated temperatures. That is, a material which has a red hardness has a resistance to heat softening. True or false
Which of the information given below about processing capability is wrong ?(Aşağıda işlenme kabiliyeti ile
19 -
A) The machining sbility of steels contsining 0.2% Cis meximum (%0,2C içeen çelik lerin işlenme k abiliyetleri maks imumdur.)
O B) S, Pand Pb thst are not normally found in steel improves machining ability. (S, P ve normalde çeliğin bünyes inde bulunmay an Pb iş lenme kabiliyetini iyileştirir.)
The most important component of s teels is Fe(Çelik lerin en önemli bileeni Fedir.)
O D) As the amount of C decress es or incress es, the machining capabilities of steels decresse(C mik tarı szaldikça veya arttik ça çelik lerin iş lenme kabiliyetleri szalır)
E) Co and Cu does not affect the processing ability of materials. (Co ve Cu malzemelerin iş lenmek abiliyetini etk ilememek tedir.)
Chapter 22 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 22 - For metal-cutting tools, what is the most...Ch. 22 - What is hot hardness compared to hardness?Ch. 22 - Prob. 3RQCh. 22 - Why is impact strength an important property in...Ch. 22 - Cemented carbide tools are made by a powder...Ch. 22 - What are the primary considerations in tool...Ch. 22 - What is the general strategy behind coated tools?Ch. 22 - Prob. 8RQCh. 22 - How is a CBN tool manufactured?Ch. 22 - Prob. 10RQ
Ch. 22 - Prob. 11RQCh. 22 - Discuss the constraints in the selection of a...Ch. 22 - What does cemented mean in the manufacture of...Ch. 22 - What advantage do ground carbide inserts have over...Ch. 22 - What is a chip groove?Ch. 22 - What is the DCL?Ch. 22 - Suppose you made four beams out of carbide, HSS,...Ch. 22 - Multiple coats or layers are put on the carbide...Ch. 22 - What tool material would you recommend for...Ch. 22 - What makes the process that makes TiC coatings for...Ch. 22 - Why does a TiN-coated tool consume less power than...Ch. 22 - For what work material are CBN tools more commonly...Ch. 22 - Why is CBN better for machining steel than...Ch. 22 - What is the typical coefficient of variation for...Ch. 22 - What is meant by the statement Tool life is a...Ch. 22 - The typical value of a coefficient of variation in...Ch. 22 - Machinability is defined in many ways. Explain how...Ch. 22 - What are the chief functions of cutting fluids?Ch. 22 - Prob. 29RQCh. 22 - Why is the PVD process used to coat HSS tools?Ch. 22 - Why is there no universal cutting tool material?Ch. 22 - What is an 18-4-1 HSS composed of?Ch. 22 - Over the years, tool materials have been developed...Ch. 22 - Why is the rigidity of the machine tool an...Ch. 22 - Explain how it can be that the tool wears when it...Ch. 22 - What is a honed edge on a cutting tool and why is...Ch. 22 - Suppose you have a turning operation using a tool...Ch. 22 - A 2 in.-diameter bar of steel was turned at 284...Ch. 22 - Prob. 3PCh. 22 - The following data have been obtained for...Ch. 22 - In the insert is set with a 0 side cutting-edge...Ch. 22 - Prob. 6PCh. 22 - Here is a single point tool. Identify angles A...Ch. 22 - Figure 22.B gives data for cutting speed and tool...
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