Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 24, Problem 7RQ
Which type of milling (up or down) is being done in Figures-24.1b, 24.1d, 24.2b, 24.10, and 24.12?
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Find the machining time to complete the job as shown below from the basic raw material of 50 mm
diameter and 100 mm length. Assume the following data: cutting speed for turning and boring = 25
m/min, feed for turning and boring = 0.5 mm/rev, cutting speed for drilling = 20 m/min, feed for drilling
= 0.25 mm/rev, depth of cut not to exceed = 5 mm?
40
25
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A cylindrical mild steel work piece of Ø55 X 200mm undergoes a turning operation on a lathe machine to
reduce the diameter to Ø 45mm. The cutting parameters are 23 m/minute, 0.3 mm/ revolution and 0.5
mm are cutting speed, feed and depth of cut respectively.
Determine the following.
i) Time for single pass (minutes).
ii) Find number of passes required to reduce the diameter from Ø55 to Ø45mm.
iii) Total time required to complete the turning operation in minutes (Tfinal).
A mild steel specimen of Initial diameter of
51.5 mm is turned to final diameter of 48 mm
for an initial length of 151 mm on a lathe
machine.
Using the given data find the following.
(i) Feed of 0.1 mm/rev & Depth of cut is 0.5
mm
(ii) During machining the tool's approach
length is 7 mm, over run length is 2mm
(iii) Total time required to complete the
turning operation is 48.8 minutes
(a) Find number of passes to finish the entire
turning operation
(b) The actual length of the turning operation
in mm (
(c)The time required to complete one single
turning operation in minutes
(d) Spindle speed in rpm
Chapter 24 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 24 - Suppose that you wanted to machine cast iron with...Ch. 24 - How is the feed per tooth related to the feed rate...Ch. 24 - Why must the number of teeth on the cutter be...Ch. 24 - Why is the question of up or down milling more...Ch. 24 - For producing flat surfaces in mass-production...Ch. 24 - Milling has a higher metal removal rate than...Ch. 24 - Which type of milling (up or down) is being done...Ch. 24 - Why does down milling dull the cutter more rapidly...Ch. 24 - What parameters do you need to specify in order to...Ch. 24 - In Figure 24.2b, the tool material is carbide....
Ch. 24 - What is the advantage of a helical-tooth cutter...Ch. 24 - What would the cutting force diagram for Fc look...Ch. 24 - Could the stub arbor-mounted face mill shown in...Ch. 24 - In a typical solid arbor milling cutter shown in...Ch. 24 - Make some sketches to show how you would you set...Ch. 24 - Make some sketches to show how you would set up a...Ch. 24 - Explain how controlled movements of the work m...Ch. 24 - Prob. 18RQCh. 24 - What is the purpose of the hole-circle plate on a...Ch. 24 - You have selected a feed per tooth and a cutting...Ch. 24 - How much time will be required for a milling...Ch. 24 - If the depth of cut is 0.35 in., what is the metal...Ch. 24 - Prob. 4PCh. 24 - Calculate the spindle rpm and table feed (ipm) for...Ch. 24 - A gray cast iron surface 6 in. wide and 18 in....Ch. 24 - Prob. 7PCh. 24 - In Figure 24.12, the feed is 0.006 in. per tooth....Ch. 24 - Suppose you want to do the job described in...Ch. 24 - The Bridgeport vertical-spindle milling machine is...Ch. 24 - The KC Machine Works, which does job shop...
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- operation, the shear IS cIose to, In turning operation, spindle speed is set to provide a cutting speed of 2.2 m/: The feed and depth of cut are 0.32 mm and 2.1 mm, respectively. The tool rake angle is 15°. After the cut, the deformed chip thickness is measured to be 0.43 mm. Using the Orthogonal model as an approximation of turning operation, the shear strain is close to, In turning operation, spindle speed is set to provide a cutting speed of 2.4 m/arrow_forward1. In Figure 1, the feed is 0.006 in. per tooth. The cutter is rotating at an rpm that will produce the desired surface cutting speed of 125 fpm. The cutter diameter is 3 in. The depth of cut is 0.15 in and width of the cut is 2 in. The block is 5 in. wide and 12in long. Determine a. The feed, in inches per minute. b. Approach distance for this type of milling c. Cutting time to make one pass across the surface d. If an additional approach distance of 0.5 in is provided at the beginning of pass and an over travel distance is provided at the end of pass equal to the cutter radius plus 0.5 in, what is the duration of the feed motion? Speesi neten Cite Citter praiten t staof cit Solld hellcal plain milling cuttar Wout Helical teeth TUp w Figure: 01arrow_forwardA mild steel specimen of Initial diameter of 53.5 mm is turned to final diameter of 47 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii) During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Total time required to complete the turning operation is 59.6 minutesarrow_forward
- A mild steel specimen of Initial diameter of 53.5 mm is turned to final diameter of 47 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii) During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Total time required to complete the turning operation is 59.6 minutes (a) Find number of passes to finish the entire turning operation ( (b) The actual length of the turning operation in mm ('arrow_forwardA mild steel specimen of Initial diameter of 30.5 mm is turned to final diameter of 27 mm for an initial length of 153 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Time required to complete one single turning operation is 3.5 minutes (a)Find number of passes to finish the entire turning operation (b) Total time required to complete the turning operation in minutesarrow_forwardA mild steel specimen of Initial diameter of 30.5 mm is turned to final diameter of 27 mm for an initial length of 153 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Time required to complete one single turning operation is 3.5 minutes (c) Spindle speed in in rpm (= (d) Cutting speed in m/minutes(=arrow_forward
- A mild steel specimen of Initial diameter of 32.5 mm is turned to final diameter of 25 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.3 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 6 mm, over run length is 3mm (iii) Time required to complete one single turning operation is 2.3 minutes (a)Find number of passes to finish the entire turning operation (b) Total time required to complete the turning operation in minutes (c) Spindle speed in in rpm (d) Cutting speed in m/minutesarrow_forwardPlease typing answer only IENG 302 - Manufacturing Processes: We are reducing the diameter of a 95.8 mm cylinder to 30.04 mm using 7 roughing passes and 3 finishing passes. The finishing operations use a depth of cut of 1.51 mm. The roughing operations are performed with a feed rate of 9.61 mm/s and the finishing operation is performed with a feed rate of 11.31 mm/s. a) What is the depth of cut for a roughing pass? b) What is the rate of material removal (mm^3/s) for the third roughing pass? c) What is the rate of material removal (mm^3/s) for the final finishing pass? d) What is the average rate of material removal (mm^3/s) for the roughing operations?arrow_forwardQ1:- Put a mark of True or false for below:- (a):- The milling cutting tool has a single cutting edge? (b):- At the break-even point, the total revenue equals the total cost? (c):- The right-hand rule is used to define machine axes? (d):- Design error is a simple mistake? (e):- The quality of products is poor in mass production? (f):- Allowances must be left before turning? (g):- Up-ward milling is better than down-ward milling?arrow_forward
- Q.B5. a.) In a drilling operation, 3 blind holes needs to be drilled to a depth of 16 mm and a diameter of 8 mm. The point angle is 105° and the drill is made from HSS material. The bench drill allows a fixed speed of 1400 RPM and a feed of 0.1 mm per rev. The work part is mild steel with a thickness of 22 mm. Determine the time required to complete this operation. b.) What are some factors that determine the type of industrial cleaning that will be applied to a part? c.) In mass finishing, two key processes have been discussed - state both the processes here and explain their difference. d.) Draw and explain how a basic heading operation is carried out to produce nails.arrow_forwardQ24. For the below figure please write its part program. The depth of the cut is 0.25 inches (Finishing operation), while the tool's diameter is 0.5 inches. Consider the speed and feed. -0.75- - - 1.0 60⁰ RO.25 (0, 0) 0.75-arrow_forwardIn a turning process using orthogonal tool geometry, a chip length of 100 mm is obtained for an uncut chip length of 250 mm. The cutting conditions are cutting speed 30 m/min, rake angle = 20°º. The shear plane angle is degrees (round off to one decimal place). =arrow_forward
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