EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 2RQ
Name the factors that contribute to the formation of discontinuous chips.
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In a production turning operation, the workpart is 60 mm in diameter and 500 mm
long. A feed of 0.75 mm/rev is used in the operation. If cutting speed-9 m/s, the tool
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to produce 50 pieces between tool changes. Determine the Taylor tool life equation for
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L
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AD, vT" = C
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fv
Chapter 21 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
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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- In a production turning operation, the workpart is 60 mm in diameter and 500 mm long. A feed of 0.75 mm/rev is used in the operation. If cutting speed=9 m/s, the tool must be changed every 4 workparts; But if cutting speed=5 m/s, the tool can be used to produce 50 pieces between tool changes. Determine the Taylor tool life equation for this job. (use the equations given below for solution)arrow_forwardIn a production turning operation, the workpart is 60 mm in diameter and 500 mm long. A feed of 0.75 mm/rev is used in the operation. If cutting speed=9 m/s, the tool must be changed every 4 workparts; But if cutting speed=5 m/s, the tool can be used to produce 50 pieces between tool changes. Determine the Taylor tool life equation for this job. (use the equations given below for solution)arrow_forward1.) The rake angle in an orthogonal cutting operation is -5.736°. The chip thickness before the cut is 0.249 mm, and the resulting chip thickness after the cut is 0.762 mm. The chip thickness ratio is _ 2.) The rake angle in an orthogonal cutting operation is 17.995°. The chip thickness before the cut is 0.254 mm, and the resulting chip thickness after the cut is 0.595 mm. The shear plane angle is _ degrees. 3.) The rake angle in an orthogonal cutting operation is -2.804°. The chip thickness before the cut is 0.204 mm, and the resulting chip thickness after the cut is 0.556 mm. The shear strain is _. 4.) Microscopic examination of chips obtained from actual machining operations have revealed that they are produced by _. 5.) Low-carbon steel with 300 MPa tensile strength and 220 MPa shear strength is turned at 2.5 m/s cutting speed on a lathe. Feed (cutting width) is 0.20 mm/rev and depth of cut is 3.0 mm. Rake angle is 5°. The resulting chip ratio = 0.45. The cutting force is _ N…arrow_forward
- You have been asked to work on some design problems and technically support the team working on material removal processes: 1. Technician is turning (lathing) a work material with a shear strength of 270 MPa as shown in Figure 1. The following conditions are used: v = 5.0 m/s, f = 0.30 mm/rev, d = 3.0 mm, and rake angle = 15° in the direction of the chip flow. The resulting chip ratio = 0.5 , material removal rate = 4500 mm3/min ,shear plane angle = 29.02° and the shear strain is = 2.052. Chip Tool R. RF: Turning process.Using the orthogonal model as an approximation of turning, you have been asked to determine: (a) Shear force. (b) Cutting force and thrust force. (c) Friction angle.arrow_forwardYou have been asked to work on some design problems and technically support the team working on material removal processes: 1. Technician is turning (lathing) a work material with a shear strength of 270 MPa as shown in Figure 1. The following conditions are used: v = 5.0 m/s, f = 0.30 mm/rev, d = 3.0 mm, and rake angle = 15° in the direction of the chip flow. The resulting chip ratio = 0.5. Chip Tool R. RF. Work Figure 1: Turning process. Using the orthogonal model as an approximation of turning, you have been asked to determine: (a) Material removal rate (b) Shear plane angle. (c) Shear strain. (d) Shear force. (e) Cutting force and thrust force.arrow_forwardYou have been asked to work on some design problems and technically support the team working on material removal processes: 1. Technician is turning (lathing) a work material with a shear strength of 270 MPa as shown in Figure 1. The following conditions are used: v = 5.0 m/s, f = 0.30 mm/rev, d = 3.0 mm, and rake angle = 15° in the direction of the chip flow. The resulting chip ratio = 0.5. Chip Tool R. RF. Work Figure 1: Turning process. Using the orthogonal model as an approximation of turning, you have been asked to determine: (a) Shear force. (b) Cutting force and thrust force. (c) Friction angle.* ) material removal rate = 4500 mm3/min * ) shear plane angle = 29.02° * ) shear strain = 2.052arrow_forward
- Find the machining time, in seconds, and the rate of material removing in mmA3;sec for a turning operation having the following information: 1- Wp diameter is 80mm, 2- the length is 0.12m, 3- the cutting speed is 80m/min, 4- feed i50.5 mm/rev and 5- the depth of cut is 0.002m.arrow_forwardA mild steel block of width 40 mm is being milled using a straight slab cutter 70 mm diameter with 30 teeth. If the cutter rotates at 40 rpm, and depth of cut is 2 mm, what is the value of maximum uncut chip thickness when the table feed is 20 mm/min?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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