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 27, Problem 8P
Could you have saved any time in Problem 7 by cutting the block in the 7-in. direction? Redo with
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In crank and slotted lever quick return mechanism, the crank length is (100 +X )mm and the
distance between the fixed center is (225+X)mm. The length of the slotted lever is (525+X)mm.
Determine the ration of time of cutting stroke to time of return stroke.
Also calculate the length of the stroke .
Note where X is two digit number made from the last two digit of the registration number of the
students
For example if the reg. no. of the student is 11912081 then X=81 and crank length is
80+81=161mm
Draw the neat and clean diagram with proper scale. Rough drawings will not be
considered
Write the sequential procedure and CNC code for making the simple step turning operation for
making the shown job -
100
15-1
42
Size of Raw material Total Length = 100 mm, Free length out of Clamping device = 70 mm,
Diameter = 42 mm, this has to be reduced to 10 mm, 20 mm, 30 mm, diameter for a length of
15 mm steps each as shown above diagram.
1. Are there any reference measurements on the drawing? (Yes/No)
2. Are there any cutting planes on this drawing? (Yes/No)
3. Who checked the drawing? Exactly how it is on the print.
Thanks!
Chapter 27 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 27 - Why is sawing one of the most efficient of the...Ch. 27 - Explain why tooth spacing (pitch) is important in...Ch. 27 - What is the tooth gullet used for on a saw blade?Ch. 27 - Explain what is meant by the set of the teeth on a...Ch. 27 - How is tooth set related to saw kerf?Ch. 27 - Why can a bandsaw blade not be hardened throughout...Ch. 27 - What are the advantages of using circular saws?Ch. 27 - Why have bandsawing machines largely replaced...Ch. 27 - Explain how the hole in Figure 27.7 is made on a...Ch. 27 - How would you calculate or estimate Tm for a...
Ch. 27 - What is the disadvantage of using gravity to feed...Ch. 27 - What is unique about the broaching process...Ch. 27 - Can a thick saw blade be used as a broach? Why or...Ch. 27 - Broaching machines are simpler in a basic design...Ch. 27 - Why is broaching particularly well-suited for mass...Ch. 27 - In designing a broach, what would be the first...Ch. 27 - Why is it necessary to relate the design of a...Ch. 27 - What two methods can be utilized to reduce the...Ch. 27 - For a given job, how would a broach having...Ch. 27 - Why are the pitch and radius of the gullet between...Ch. 27 - Why are broaching speeds usually relatively low,...Ch. 27 - What are the advantages of shell-type broach...Ch. 27 - Why are most broaches made from alloy or...Ch. 27 - What are the advantages of TiN-coated broaching...Ch. 27 - For mass-production operations, which process is...Ch. 27 - What is the difference between the roughing teeth...Ch. 27 - The sides of a square, blind hole must be machined...Ch. 27 - The interior, flat surfaces of socket wrenches,...Ch. 27 - Prob. 29RQCh. 27 - What are some ways to improve the efficiency of a...Ch. 27 - To what extent is filing different from sawing?Ch. 27 - Prob. 32RQCh. 27 - Prob. 33RQCh. 27 - Prob. 34RQCh. 27 - A surface 12 in. long is to be machined with a...Ch. 27 - The pitch of the teeth on a simple surface broach...Ch. 27 - Estimate the (approximate maximum) horsepower...Ch. 27 - Estimate the approximate force acting in the...Ch. 27 - In cutting a 6-in.-long slot in a piece of AISI...Ch. 27 - The strength of a pull broach is determined by its...Ch. 27 - Suppose you want to shape a block of metal 7 in....Ch. 27 - Could you have saved any time in Problem 7 by...Ch. 27 - Derive the equation for shaping cutting speed.Ch. 27 - How many strokes per minute would be required to...Ch. 27 - How much time would be required to shape a flat...Ch. 27 - What is the metal removal rate in Problem 11 if...Ch. 27 - Suppose you decide to mill the flat surface...Ch. 27 - A planer has a 10-hp motor, and 75% of the motor...
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- A long workpiece, with the length-to-dimeter ratio that exceeds factor 10, is to be machined. Which workholding should provide the lowest deflection? Collet in the spindle and a live center in the tailstock Chuck on the spindle, a live center in the tailstock, and a follower rest Mandrel Solid center with a dog and a dog plate on the spindle, a live center in the tailstock Faceplatearrow_forwardNote: All dimensions are in mm Ø 34 A 34 mm diameter x 120 mm shafting will be turned using a lathe to produce a step shafting as shown in the figure. Calculate the required (minimum) total machining time Tm with the following cutting 30 -70- 50 120 conditions: Step Shafting Rough Turn: V = 30 m/min; Max. Depth of Cut = 1.5 mm; Feed = 0.2 mm/rev Finish Turn: V = 60 m/min; Max. Depth of Cut = 0.5 mm; Feed = 0.05 mm/rev Lathe available rpm: 150, 200, 250, 350, 400, 450, 500, 550, 600, 650, 700arrow_forwardPlease need within 30 min Thank you.arrow_forward
- thickness is HW3.A block of steel has a length L-600mm and a width W-450mm. The Machined 10mm, once by Peripheral Milling and once by planing Machine.Calculate :Machining time for each operation if you know the following For peripheral milling: cutting speed V =80 m/min, Feed f-0.15mm/rev, the cutter .1 diameter D =50 mm with five teeth and depth of cut d =3mm For planing: clearance on both sides c =25mm, cutting speed V =36.56 m/min, retum to .2 cutting ratio m =0.25, feed f=5 mm/stroke and depth of cut d =5 mm .Calculate Material removal rate in both processes .3 Solutionarrow_forwardCalculate spindle RPM and machining time for cutting a 1.5" diameter 4" long at 225 SFPM using a feed rate of 0.004".arrow_forwardCalculate spindle speed and feed for the two following situations: a. Use an HSS 1/2"-diameter three-flute endmill to mill 6061 aluminum 350 SFPM using a 0.0015" chip load. b. Use a carbide 3"-diameter eight-tooth shell mill to machine H13 tool steel at 200 SFPM using a 0.003" chip load.arrow_forward
- A step by step answer pleasearrow_forwardQ2 -Calculate the taper angle if the major diameter is 40.00mm and minor diameter is 28.00. The length of workpiece is 150mm and length of taper is 30mm. Choose the suitable method for calculating the taper angle. Also draw the setup for this type of arrangement ?arrow_forwardWrite the sequential procedure for making the simple step turning operation for making the shown job – 100 Size of Raw material Total Length = 100 mm, Free length out of Clamping device = 70 mm, Diameter = 42 mm, this has to be reduced to 10 mm, 20 mm, 30 mm, diameter for a length of 15 mm steps each as shown above diagram.arrow_forward
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