Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 23, Problem 21QLP
Explain why the sequence of drilling, boring, and reaming produces a hole that is more accurate than drilling and reaming it only.
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Chapter 23 Solutions
Manufacturing Engineering & Technology
Ch. 23 - Describe the types of machining operations that...Ch. 23 - What is turning? What kind of chips are produced...Ch. 23 - What is the thrust force in turning? What is the...Ch. 23 - What are the components of a lathe?Ch. 23 - (a) What is a tracer lathe? (b) What is an...Ch. 23 - Describe the operations that can be performed on a...Ch. 23 - Why were power chucks developed?Ch. 23 - Explain why operations such as boring on a lathe...Ch. 23 - Why are turret lathes typically equipped with more...Ch. 23 - Describe the differences between boring a...
Ch. 23 - How is drill life determined?Ch. 23 - What is the difference between a conventional...Ch. 23 - Why are reaming operations performed?Ch. 23 - Explain the functions of the saddle on a lathe.Ch. 23 - Describe the relative advantages of (a)...Ch. 23 - Explain how external threads are cut on a lathe.Ch. 23 - Prob. 17RQCh. 23 - Explain the reasoning behind the various design...Ch. 23 - Note that both the terms tool strength and...Ch. 23 - (a) List and explain the factors that contribute...Ch. 23 - Explain why the sequence of drilling, boring, and...Ch. 23 - Why would machining operations be necessary even...Ch. 23 - A highly oxidized and uneven round bar is being...Ch. 23 - Describe the difficulties that may be encountered...Ch. 23 - (a) Does the force or torque in drilling change as...Ch. 23 - Explain the similarities and differences in the...Ch. 23 - Describe the advantages and applications of having...Ch. 23 - Assume that you are asked to perform a boring...Ch. 23 - Explain the reasons for the major trend that has...Ch. 23 - Describe your observations concerning the contents...Ch. 23 - The footnote to Table 23.12 states that as the...Ch. 23 - In modern manufacturing, which types of metal...Ch. 23 - Sketch the tooling marks you would expect if a...Ch. 23 - What concerns would you have in turning a powder...Ch. 23 - The operational severity for reaming is much lower...Ch. 23 - Review Fig. 23.6, and comment on the factors...Ch. 23 - Explain how gun drills remain centered during...Ch. 23 - Comment on the magnitude of the wedge angle on the...Ch. 23 - If inserts are used in a drill bit (see Fig....Ch. 23 - Refer to Fig. 23.11b, and in addition to the tools...Ch. 23 - Calculate the same quantities as in Example 23.1...Ch. 23 - Estimate the machining time required to rough turn...Ch. 23 - A high-strength cast-iron bar 8 in. in diameter is...Ch. 23 - A 0.30-in.-diameter drill is used on a drill press...Ch. 23 - In Example 23.4, assume that the workpiece...Ch. 23 - For the data in Problem 23.45, calculate the power...Ch. 23 - A 6-in.-diameter aluminum cylinder 10 in. in...Ch. 23 - A lathe is set up to machine a taper on a bar...Ch. 23 - Assuming that the coefficient of friction is 0.25,...Ch. 23 - A 3-in.-diameter, gray cast iron cylindrical part...Ch. 23 - Would you consider the machining processes...Ch. 23 - Would it be difficult to use the machining...Ch. 23 - If a bolt breaks in a hole, it typically is...Ch. 23 - An important trend in machining operations is the...Ch. 23 - Review Fig. 23.8d, and explain if it would be...Ch. 23 - Boring bars can be designed with internal damping...Ch. 23 - A large bolt is to be produced from extruded...Ch. 23 - Make a comprehensive table of the process...
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- What are two benefits of boring over other holemaking operations?arrow_forward7. What are the main differences between the twist drill and the end mill cutting tools? 8. What are the different methods to fix the wp on the milling machine? 9. With the aid of net sketches, state the different milling operations on the vertical milling machine. 10. With aid of neat sketch, explain the milling parameters. 11. With aid of neat sketches, explain the drilling parameters.arrow_forwardQuestion 1. Provide brief explanations to each one of the following questions: 1.a. Explain why studying the types of chips produced is important in understanding cutting operations. 1.b. Describe the reasons for and advantages of coating cutting tools with multiple layers of different materials. What are the possible effects of these coatings on the developed chip during cutting process 1.c. Describe the reasons for and advantages of coating cutting tools with multiple layers of different materials. 1.d. Emulsion cutting fluids typically consist of 95% water and 5% soluble oil and chemical additives. Why is the ratio so unbalanced? Is the oil needed at all? 1.e. What is the difference between a live center and a dead center, when these terms are used in the context of workholding in a lathe?arrow_forward
- When roughing a pocket, should you machine in a clockwise or counterclockwise direction, and why?arrow_forwardRead the sentences given below and Identify the wrong statement. Sentence 1. The advantage of an independent chuck is that the work can be centered to high precision. Sentence 2. The advantage of an independent chuck is that it is easy to work with. Sentence 2 is False None of the sentences are False Sentence 1 is False Sentence 1 and 2 are Falsearrow_forwardThe tool signature of a single point cutting tool in ORS system is 10° – 15° – 20° – 15° – 30° – 60° – 0 mm. Assume reasonable length of the tool, cross-sectional area, shank length and other dimensions if required. (a) Draw an isometric view (in scale) of the single point cutting tool. (b) Show all the angles clearly in sectional views.arrow_forward
- .cutting speed is 9m/min. The return time to cutting time is 1:4 and the feed is 3mm Q.4 (i) Find the time required for taking a cemplete cut on a plate 600 × 900 mm", if the cutting speed is 9m/min. The return time to cutting time is 1:4 and the feed is 3mm for the shaper. The clearance at each end is 75 mm. (11) A hole of 30 mm diameter and 75 mm depth is to be drilled. The feed is 1.3 mm/rev and the cutting speed is 62 m/min. Assuming tool approach and tool over travel as 6 mm. Calculate : (a) Cutting time and (b) Material removal rate Q.5 Write short note on the following - (i) Up milling and down milling processes (ii) Balancing of grinding wheels (iii) Gear hobbing ittp3.7 w w w.ItuommC.comarrow_forwardWhy is speed important in a drilling operation ? What are the results of a drill bit with unequal lips ? Why should you not hold work by hand when drilling ?arrow_forwardAnswer the following questions by circling True or False. 5. Tool layouts can be converted into a cam profile that is used for the control of the tool. .... () 6. Higher the rake angle, less the cutting forces. 7. A very large clearance angle increases the strength of the tool tip. 8. The continuous chip causes poor surface finish and low tool life. 9. Ceramics are the hardest tool materials in the world. 10. The smaller the cutting ratio, the larger the cutting deformation. 11. A shaper can be used for maching flat surfaces in horizontal and angular directions. 12. During the return stroke of the shaper, the cutting tool will simply be sliding... 13. The cutting speed of the hydraulic shaper changes throughout most of the cutting stroke. 14. Arbour-mounted cutters are used in vertical axis machines to generate flat surfaces... 15. Dividing head is an important attachment that is used to divide the periphery of the workpiece into a number of divisions to machine surfaces.. () () ()arrow_forward
- 2. Discuss the difference between upright drilling machines with radial arm drilling machine with neat picture?arrow_forwardThe following data was obtained from an orthogonal cutting test. Rake angle = 20° Depth of cut = 6 mm Feed rate = 0.25 mm/rev Cutting speed = 0.6 m/s Chip length before cutting = 29.4 mm Vertical cutting force = 1050 N Horizontal cutting force = 630 N Chip length after cutting = 12.9 mm Using Merchant's analysis, calculate (a) Magnitude of resultant force, (b) shear plane angle, (c) friction force and friction angle, and (d) various energies consumed.arrow_forwardIn a drilling operation under a given condition, the tool life found to decrease from 20 mint to 5 mint due to increase in drilling speed from 200 rpm to 400 rpm. What will be the tool life of that drill under the same condition if the drill speed is 300 rpm.arrow_forward
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