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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Why is speed important in a drilling operation?
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Consider a profile milling operation, where the
initial (stock) geometry has (X,Y,Z) dimensions of
100 mm x 75 mm x 50 mm. The target part has
dimensions of 95 mm x 70 mm x 50 mm. The
target part is located in the centre of the stock
part, i.e. the stock to be removed from all sides is
equal. The operation has a cutting time of 1
minute. The tool axis is along the Z direction and
the tool diameter is 12 mm having 6 cutting
edges. The takes place at 54m/min
feed rate of 0.2 mm/rev/tooth.
Calculate the axial depth of cut ?
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at a
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_forwardi need the answer quicklyarrow_forwardA part surface is machined using single point cutting tool with feed rate of 0.3 mm/ rev. Given that, surface roughness is measured using centre line average method and details were given below, Sampling length = 0.8 mm Vertical Magnification = 10000 Horizontal Magnification = 100 Sum of areas above & below = 960 mm? What will be the Nose radius of cutting tool?arrow_forward
- wing (3) You are to produce a machine part (a shaft) with different diameters S0mm.35mm and 30mm with thread and keyway at the end of the shaft (a) How many machines and cutting tools will you use to produce this part 1arrow_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_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_forward
- Question 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_forwardWhen roughing a pocket, should you machine in a clockwise or counterclockwise direction, and why?arrow_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
- I need the answer as soon as possiblearrow_forwardASAParrow_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_forward
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