Manufacturing Engineering & Technology
Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 22, Problem 34QLP

It has been stated that titanium-nitride coatings allow cutting speeds and feeds to be higher than those for uncoated tools. Survey the technical literature and prepare a table showing the percentage increase of speeds and feeds that would be made possible by coating the tools.

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In machining a mild steel work piece with carbide tool, the life of the tool was found to be 1 hour and 40 minutes, at a spindle speed of 25 m/min. Calculate the tool life if it has to be operated at a speed of 30% higher than the initial cutting speed. Also calculate the cutting speed if the tool is required to have a life of 2 hours and 45 minutes. Assume Taylor’s exponent value n is 0.28.
(b) During a certain machining experiment at the UCSI workshop, it is observed that temperature at the tool workpiece interface is 1200 °C at a cutting speed of 300 mm/min with a feed rate of 0.002 mm/rev. (1) Analyse how the temperature will be affected if the cutting speed is increased by 100 %. (ii) Detemine the cutting speed necessary to achieve a maximum cutting temperature of 900 °C.
A 150-mm-long, 12.5-mm-diameter 304 stainless-steel rod is being reduced in diameter to 12.0 mm by turning on a lathe. The spindle rotates at N = 400 rpm, and the tool is traveling at an axial speed of 200 mm/min. Calculate the cutting speed, material- removal rate, cutting time, power dissipated, and cutting force. %3D

Chapter 22 Solutions

Manufacturing Engineering & Technology

Ch. 22 - Describe the advantages and limitations of (a)...Ch. 22 - What is a cermet? What are its advantages?Ch. 22 - Explain the difference between M-series and...Ch. 22 - Why is cBN generally preferred over diamond for...Ch. 22 - What are the advantages to dry machining?Ch. 22 - Explain why so many different types of...Ch. 22 - Which tool-material properties are suitable for...Ch. 22 - Describe the reasons for and advantages of coating...Ch. 22 - Make a list of the alloying elements used in...Ch. 22 - As stated in Section 22.1, tool materials can have...Ch. 22 - Explain the economic impact of the trend shown in...Ch. 22 - Why does temperature have such an important effect...Ch. 22 - Ceramic and cermet cutting tools have certain...Ch. 22 - What precautions would you take in machining with...Ch. 22 - Can cutting fluids have any adverse effects in...Ch. 22 - Describe the trends you observe in Table 22.2.Ch. 22 - Why are chemical stability and inertness important...Ch. 22 - Titanium-nitride coatings on tools reduce the...Ch. 22 - Describe the necessary conditions for optimal...Ch. 22 - Negative rake angles generally are preferred for...Ch. 22 - Do you think that there is a relationship between...Ch. 22 - Make a survey of the technical literature, and...Ch. 22 - In Table 22.1, the last two properties listed...Ch. 22 - It has been stated that titanium-nitride coatings...Ch. 22 - Note in Fig. 22.1 that all tool materials,...Ch. 22 - Referring to Table 22.1, state which tool...Ch. 22 - Which of the properties listed in Table 22.1 is,...Ch. 22 - If a drill bit is intended only for woodworking...Ch. 22 - What are the consequences of a coating on a tool...Ch. 22 - Discuss the relative advantages and limitations of...Ch. 22 - Emulsion cutting fluids typically consist of 95%...Ch. 22 - List and explain the considerations involved in...Ch. 22 - Review the contents of Table 22.1. Plot several...Ch. 22 - Obtain data on the thermal properties of various...Ch. 22 - The first column in Table 22.2 shows 10 properties...Ch. 22 - Describe in detail your thoughts regarding the...Ch. 22 - One of the principal concerns with coolants is...Ch. 22 - How would you go about measuring the effectiveness...Ch. 22 - There are several types of cutting-tool materials...Ch. 22 - Assume that you are in charge of a laboratory for...Ch. 22 - Tool life could be greatly increased if an...Ch. 22 - List the concerns you would have if you needed to...
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