EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 22, Problem 29QLP
Describe the necessary conditions for optimal utilization of the capabilities of diamond and cubic-boron-nitride cutting tools.
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(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.
What are the functions served by cutting fluid? Give broad classification of cutting fluid and explain each in detail .
(a) Explain the differences between High-speed steels, cubic boron nitride and
polycrystalline diamonds cutting tools.
Chapter 22 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 22 - What are the major properties required of...Ch. 22 - What is the composition of a typical carbide tool?Ch. 22 - Why were cutting-tool inserts developed?Ch. 22 - Why are some tools coated? What are the common...Ch. 22 - Explain the applications and limitations of...Ch. 22 - List the major functions of cutting fluids.Ch. 22 - Why is toughness important for cutting-tool...Ch. 22 - Is the elastic modulus important for cutting-tool...Ch. 22 - Explain how cutting fluids penetrate the toolchip...Ch. 22 - List the methods by which cutting fluids are...
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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- Explain the following terms and situations in metal cutting. Give enough explanation with figures if it is necessary. A)Force and chatter vibrations. How can you detect the vibration during the machining? How can you decide which type of the vibration you have? B) Mode shapes. C)Mode coupling. D)Process damping. Which parameters can affect the process damping? i)Mode coupling. j) Regenerative chatter vibrations. k) Stability lobes.arrow_forward(e) Briefly describe types of chips that occur in metal cutting. (f) For orthogonal cutting, the tool rake angle =15°. The chip thickness before the cut is 0.30mm and the cut yields a deformed chip thickness = 0.65mm. Calculate the shear plane angle and shear strain.arrow_forwardA 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. %3Darrow_forward
- 3. On an upright drilling machine, a 20 mm diameter hole is to be produced in a plate of SAEE112 steel of 30 mm thickness. The cutting speed selected is 10 m/min, and the cutting torque measured is 20 N.m. Calculate the spindle speed, the depth of cut, the main cutting force, and the cutting power.arrow_forwardIn 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 30 m/min. Calculate the tool life if it has to be operated at a speed of 40% 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 valuen is 0.28.arrow_forwardIn an orthogonal cutting test with a bar of 75 mm diameter is reduced to 73 mm by using a HSS tool with arake angle = 10o, following observations were made: length of the chip, lc = 69.44 mm, cutting ratio r =0.3, the horizontal component of the cutting force, FH = 1450 N, and the vertical component of the cuttingforce, FV = 850 N. The various parameters recorded in this cutting operation are: depth of cut, d = 2 mm;feed rate, f = 0.3 mm/rev, cutting speed, V = 60 m/min. Using Merchant’s theory calculate the following:1) Friction force along rake face2) Normal force acting on rake face3) Shear force along the shear plane4) Normal force acting on shear plane5) The percentage error in shear angle predicted by Merchant’s theory6) Shear velocity7) Chip velocity8) Total work done9) The shear work proportion out of the total work done10) The friction work proportion out of the total work donearrow_forward
- Identify the forces involved in a cutting operation. which of these forces contributes to the power required?arrow_forwardA 150 mm long with 12.5 mm in diameter of a stainless steel rod is being reduced in diameter to 12.0 mm using a lathe machine. The machine spindle rotates at 400 rpm, and tool is traveling at an axial speed of 200 mm/min. (c) Calculate: (i) Cutting speed (ii) Material remo val rate (iii) Cutting time.arrow_forwardIn a cutting test with 0.3 mm flank wear as tool failure criterion, a tool life of 10 min was obtained at a cutting velocity of 20 m/min. Taking tool life exponent as 0.25, the tool life in minutes at 40 m/min of cutting velocity will bearrow_forward
- Discuss the effects of cutting speed, feed rate, and depth of cut on the tool wear rate during a turning operation. How does each parameter influence the surface finish of the workpiece? Provide a detailed explanation based on the principles of metal cutting mechanics.arrow_forwardThis Question is from Metal and Machine Tools. Due Today Please Answer !!arrow_forwardA 600mm*30mm flat surface of a plate is to be finish machined on a shaper .The plate has been fixed with 600 mm side along the tool travel direction. If the tool over-travel at each end of the plate is 20 mm, average cutting speed is 8 m/min, feed rate is 0.3 mm/stroke and the ratio of return time to cutting time of the tool is 1:2 Determine time required for machining?arrow_forward
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