Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 24, Problem 43QTP
A 12-in.-long, 1-in.-thick plate is being cut on a band saw at 150 ft/min. The saw has 12 teeth per inch. If the feed per tooth is 0.003 inch, how long will it take to saw the plate along its length?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The blade on a typical table saw rotates at 3100 revolutions per minute. Calculate the linear velocity in miles per hour of one of the teeth at the edge of the 10 inch diameter blade.
The time required to saw a rectangular piece of stainless steel plate 3.5
meters long and 2.25 meters wide is 3/4 hour. the average feed per
stroke of hacksaw is 0.25 mm. Calculate the required speed of the power
saw in rpm in doing the crosswise cutting operation if the thickness is 25
mm.
4
125
200
O 150
O 175
across the surface and (b) the maximum metal removal rate during cutting
A slab milling operation is performed on the top surface of a steel rectangular
workpiece 12.0 in long by 2.5 in wide. The helical milling cutter, which has a
3.0 in diameter and ten teeth, is set up to overhang the width of the part on
both sides. Cutting speed is 125 ft/min, feed is 0.006 in/tooth, and depth of
cut = 0.300 in. Determine (a) the actual machining time to make one pass
across the surface and (b) the maximum metal removal rate during the cut.
(c) If an additional approach distance of 0.5 in is provided at the beginning of
the pass (before cutting begins), and an overtravel distance is provided at
the end of the pass equal to the cutter radius plus 0.5 in, what is the duration
of the feed motion.
Chapter 24 Solutions
Manufacturing Engineering & Technology
Ch. 24 - Explain why milling is such a versatile machining...Ch. 24 - Describe a milling machine. How is it different...Ch. 24 - Describe the different types of cutters used in...Ch. 24 - Define the following: face milling, peripheral...Ch. 24 - Can threads be machined on a mill? Explain.Ch. 24 - What is the difference between feed and feed per...Ch. 24 - Explain the relative characteristics of climb...Ch. 24 - Describe the geometric features of a broach and...Ch. 24 - What is a pull broach? A push broach?Ch. 24 - Why is sawing a commonly used process? Why do some...
Ch. 24 - What advantages do bed-type milling machines have...Ch. 24 - Explain why the axis of a hob is tilted with...Ch. 24 - What is a shell mill? Why is it used?Ch. 24 - Why is it difficult to saw thin sheet metals?Ch. 24 - Of the processes depicted in Fig. 24.2, which is...Ch. 24 - Describe the tool motion during gear shaping.Ch. 24 - When is filing necessary?Ch. 24 - Would you consider the machining processes...Ch. 24 - Why is end milling such an important versatile...Ch. 24 - List and explain factors that contribute to poor...Ch. 24 - Explain why broaching crankshaft bearings is an...Ch. 24 - Several guidelines are presented in this chapter...Ch. 24 - What are the advantages of helical teeth over...Ch. 24 - Explain why hacksaws are not as productive as band...Ch. 24 - What similarities and differences are there in...Ch. 24 - Why do machined gears have to be subjected to...Ch. 24 - How would you reduce the surface roughness shown...Ch. 24 - Why are machines such as the one shown in Fig....Ch. 24 - Comment on your observations concerning the...Ch. 24 - Explain how contour cutting could be started in a...Ch. 24 - Prob. 32QLPCh. 24 - Describe the parts and conditions under which...Ch. 24 - Explain the reason that it is difficult to use...Ch. 24 - Would you recommend broaching a keyway on a gear...Ch. 24 - Prob. 37QTPCh. 24 - A slab-milling operation is being performed at a...Ch. 24 - Show that the distance lc in slab milling is...Ch. 24 - Prob. 40QTPCh. 24 - Calculate the chip depth of cut, tc, and the...Ch. 24 - Estimate the time required to face mill a...Ch. 24 - A 12-in.-long, 1-in.-thick plate is being cut on a...Ch. 24 - A single-thread hob is used to cut 40 teeth on a...Ch. 24 - Assume that m the face-milling operation shown in...Ch. 24 - A slab-milling operation will take place on a part...Ch. 24 - Prob. 47QTPCh. 24 - In describing the broaching operations and the...Ch. 24 - The parts shown in Fig. 24.1 are to be machined...Ch. 24 - Would you prefer to machine the part in Fig. 24....Ch. 24 - Prob. 51SDPCh. 24 - Suggest methods whereby milling cutters of various...Ch. 24 - Prepare a comprehensive table of the process...Ch. 24 - Prob. 55SDPCh. 24 - Make a list of all the processes that can be used...
Knowledge Booster
Learn more about
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
- .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_forwardQuestion 4. The following data are available from orthogonal cutting experiments. The depth of cut (feed) to = 0.13 mm, width of cut b = 2.5 mm, rake angle a = - 5°, and cutting speed V = 2 m/s. Chip thickness, t. (mm) = 0.23 Cutting force, F. (N) = 430 Thrust force, F; (N) = 280 Determine the shear angle ð, friction coefficient u , shear stress t, shear strain y on the shear plane, chip velocity Ve, and shear velocity Vs, as well as energies uf ,Ug, and uarrow_forwardA cylindrical workpiece has a 14.0 in diameter and has 30 in long. It is to be turned in an engine lathe at the following cutting conditions: cutting speed = 400 ft/min, feed = 0.015 in/rev, and depth of cut = 0.150 in. Determine the time to complete one turning pass if the approach and overtravel allowances are each 0.25 in (total = 0.50 in). Note: 1 ft = 12 inarrow_forward
- 17) A50-mm-dia endmill cuts 6061 aluminum with 30% tool engagement at a depth of 6 mm. The tool rotates at 200 rpm and is feeding at 250 mm/min. There are 2 teeth set at a rake angle of 10°. a. Calculate the required power of cutting. b. Determine the spindle torque. c. Determine the cutting force on each tooth. d. If the thrust force is measured to be 350N, estimate the tool-chip interface friction coefficient. How could you physically verify your power estimate?arrow_forwardGiven that the length of a work-piece made from copper alloy to be face-milled is 250 mm and the width is 25 mm. The cutter diameter is 150 mm and the tooth number is 10. 1. If it takes 20 seconds to perform the cutting, suggest a cutting speed (in mm/s) and a feed (in mm/rev) to be used. 2. Give another set of values of cutting speed (in mm/s) and feed (in mm/rev) that can give the same cutting time as above.arrow_forward5arrow_forward
- It is required to reduce the thickness of cast iron workpiece with dimensions (L x w x t) of (230 mm x 120 mm x 25 mm) to 22 mm using shaper machine. Given that average cutting speed is 21 m/min, feed 1.2 mm/double stroke, and return/cutting time ratio is 3/4. The approach at each end is 72 mm. If the permissible depth of cut is 2 mm, determine the cutting time in the following cases: i) Using shaper with a mechanically driven ram. ii) Using shaper with a hydraulically driven ram. Solution: i) Mechanically ( ii) Hydraulicallyarrow_forwardHow much machining time required to turn a mild steel rod from 65mm to 58 mm over a length of 100 mm by turning using a carbide insert. If the approach length and over run length is = 5 mm, Cutting speed is 20 m/min and feed is =0.2 mm/rev, and the depth of cut is 0.5mm Darrow_forwardThe outline of the part in the Figure below is to be profile milled using a 20- mm diameter end mill with two teeth. The part is 10 mm thick. The cutting speed = 125 m/min and feed = 0.10 mm/tooth. The part is also to be drilled with a drill size of 10 mm corresponds to T01 with a cutting speed =75 mm/min and feed = 0.08 mm/rev. The two holes pass completely through the part. 30 rad. 125.75 10 dia., 2 holes Write the part program (G & M code program) for the required machining processes. Use absolute programming with the lower left 25 corner of the part as the origin in the x-y axis system. 150 (All dimensions are in mm.) 25 50 75 35 deg.arrow_forward
- 1. A workpiece with 25mm diameter is turned in a centre lathe with a back rake angle of 12 degrees and front relief angle 7 degrees. Calculate the actual cutting angles (rake angle and clearance angle) if the cutting tool is set (a) 0.8mm above the centre line of the work piece, and (b) 0.8mm below the centre line of the work piece. Rake angle h End clearance angle Figure. Tool setting errorsarrow_forward1 question. 2 partsarrow_forwardA cylindrical work bar with 4.5 in diameter and 52 in length is chucked in an engine lathe and supported at the opposite end using a live center. A 46.0 in portion of the length is to be turned to a diameter of 4.25 in one pass at a speed of 450 ft/min. The metal removal rate should be 6.75 in3 /min. Determine (a) the required depth of cut, (b) the required feed, and (c) the cutting time.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Precision Machining Technology (MindTap Course Li...Mechanical EngineeringISBN:9781285444543Author:Peter J. Hoffman, Eric S. Hopewell, Brian JanesPublisher:Cengage Learning
Precision Machining Technology (MindTap Course Li...
Mechanical Engineering
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Cengage Learning
Hand Tools; Author: UCI Media;https://www.youtube.com/watch?v=4o0tqF0jDdo;License: Standard Youtube License