Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 21, Problem 18RQ
Where does the energy consumed in metal cutting ultimately go?
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Choose TWO (2) types of cutting processes for cutting thin metal (sheet metal).
Choose TWO (2) types of cutting processes that are suitable for cutting thick materials (>20mm thick plate).
Why do we avoid cold and cold
forming during the cutting process?
Chapter 21 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 21 - Why has the metal-cutting process resisted...Ch. 21 - What variables must be considered in understanding...Ch. 21 - Which of the seven basic chip formation processes...Ch. 21 - How is feed related to speed in the machining...Ch. 21 - Before you select speed and feed for a machining...Ch. 21 - Milling has two feeds. What are they, and which...Ch. 21 - What is the fundamental mechanism of chip...Ch. 21 - What is the difference between oblique machining...Ch. 21 - What are the implications of Figure 21.13, given...Ch. 21 - Note that the units for the approximate equation...
Ch. 21 - For orthogonal machining, the cutting edge radius...Ch. 21 - How do the magnitude of the strain and strain rate...Ch. 21 - Why is titanium such a difficult metal to machine?...Ch. 21 - Explain why you get segmented or discontinuous...Ch. 21 - Why is metal cutting shear stress such an...Ch. 21 - Which of the three cutting forces in oblique...Ch. 21 - How is the energy in a machining process typically...Ch. 21 - Where does the energy consumed in metal cutting...Ch. 21 - What are two ways of estimating the primary...Ch. 21 - What are the three different ways to perform...Ch. 21 - Why does the cutting force Fc increase with...Ch. 21 - Why doesnt the cutting force Fc increase with...Ch. 21 - Prob. 23RQCh. 21 - How does the selection of the machining parameters...Ch. 21 - Suppose you had a machining operation (boring)...Ch. 21 - Make a sketch like that shown in Figure 21.1 with...Ch. 21 - Show how you would do near orthogonal machining in...Ch. 21 - Can you do orthogonal machining on a shaper or...Ch. 21 - What process and material combination would yield...Ch. 21 - What is meant by the statement that machining...Ch. 21 - Prob. 31RQCh. 21 - Figure 21.4 provides suggested cutting speeds and...Ch. 21 - For problem 1, suppose you selected a speed of 145...Ch. 21 - If the cutting forces is 1000 lb calculate the...Ch. 21 - Explain how you would estimate the cutting force...Ch. 21 - For a turning operation, you have selected a...Ch. 21 - For a slab milling operation using a...Ch. 21 - The power required to machine metal is related to...Ch. 21 - In order to drill a hole in the material described...Ch. 21 - Suppose you have the data in Table 21.A obtained...Ch. 21 - Calculate the horsepower that a process is going...Ch. 21 - Explain how you would estimate the cutting force...Ch. 21 - Derive equations for F and N using the circular...Ch. 21 - Prob. 14PCh. 21 - Prob. 15PCh. 21 - A manufacturing engineer needs an estimate of the...Ch. 21 - Using Figure 21.4 for input data, determine the...Ch. 21 - Estimate the horsepower needed to remove metal at...Ch. 21 - For a turning process, the horsepower required was...
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- What is the cutting speed of a material with a radius of 40 mm and a speed of 1000 rpm?arrow_forwardExplain 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_forwardENUMERATE THE STEPS IN CUTTING AND PIECING A PLATE USING GAS CUTTING. NOTE: NUMBER THE STEPS (1,2,3,4 AND SO ON)arrow_forward
- 2. How does the built-up-edge (BUE) form, and what are the influences of BUE on metal cutting?arrow_forward22.8 Is the elastic modulus im portant for cutting-tool materials? Explainarrow_forward1. A 12.5cm long, 5.25mm radius copper alloy rod is being reduced in diameter to 4.25mm by turning on a lathe. The spindle rotates at N = 400rpm, and the tool is traveling at an axial speed of 200mm/min. Calculate the cutting speed, material-removal rate, cutting time, power dissipated, and cutting force. %3Darrow_forward
- 3. Draw the forces and angles involved in the cutting process and calculate shear angle (Ø), friction coefficient and tangential force if ,cutting force = 80 kN , resultant of forces =100kN , friction force=75KN, rake angle =20° undeformed chip thickness = 0.65mm and deformed chip thickness 0.72mm. %3Darrow_forwardQuestion 1: Explain the following terms and situations in metal cutting. Give enough explanation with figures if it is necessary. a) Up and down milling operations. What are the effects on the workpiece surface finish and machine tool? b) Orthogonal and oblique cutting. c) Cutting force diagram in orthogonal cutting. d) Theoretical prediction of shear angle in orthogonal cutting. e) Machinability. f) Force and chatter vibrations. How can you detect the vibration during the machining? How can you decide which type of the vibration you have? g) Mode shapes. Mode coupling. h) Process damping. Which parameters can affect the process damping? i) j) Regenerative chatter vibrations. k) Stability lobes. Question 2: How will the cutting force be affected by the following situations during the machining operation? Why? a) Large rake angle b) Small relief angle c) Large nose radius d) Sharp cutting edge e) Smooth rake face f) Hard workpiece material g) High cutting speed h) Large feed rate i)…arrow_forwardWhat are various cutting technologies.arrow_forward
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