Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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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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What is an acceptable ratio of actual chip thickness to undeformed chip thickness?
3. What is a chip? Briefly explain any two types of chips? What are different factors for the formation of continuous chips ?(Explanation in own words)
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)
Chapter 21 Solutions
Manufacturing Engineering & Technology
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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) L Tm- 1,= Nf N AD, vT" = C %3| AD,L Tm fvarrow_forwardA 16mm Solid carbide tool with two teeth is used to machine Aluminium using the cutting speed of 275.00 m/min. The feed per tooth is 0.28 mm. What is the right feed rate to use to program the CNC machine? Your Answer: Answerarrow_forwardfactors affecting chip formationarrow_forward
- 1- Why the thickness of chip after cutting process is larger than chip thickness before cutting process? 2- What is the reason of variety of the chips types with cutting conditions? 3- What is the difference in the feed rate between turning machining and milling machining? 4- Draw chart between feed rate (S) and chip reduction coefficient (2) with discuss it.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_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 , 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_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. 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_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
- Question 3. a. A cast iron component for motorcycle is to be turned with machine settings of feed = 0.22 mm/rev, and speed = 100 m/min. The cutting tool is a carbide tip with a nose radius of 1.2 mm and the rai for the material at a cutting speed of 100 m/min is 1.3. Calculate the surface roughness for this cut. [6 marks]arrow_forwardPlain milling is performed to finish a cast iron workpart prior to painting. The milling cutter has a diameter of 80 mm and four equally spaced teeth. The chip load is set to 0.40 mm/tooth and cutting speed is 1.0 m/s. Estimate the surface roughness for i. up-milling, and ii. down-milling.arrow_forward2. The following data was obtained from an orthogonal cutting test: Rake angle = 20° Cutting speed = 100 m/min Chip length before cutting = 29.4 mm Chip length after cutting = 12.9 mm Vertical cutting force 1050 N Horizontal cutting force = 630 N Using Merchant's analysis, calculate (a) resultant force (c) friction force and friction angle (b) shear plane angle (d) total work donearrow_forward
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