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 23, Problem 11P
The following data apply for machining a part on a turret lathe and on an engine lathe:
One of the jobs for the engineer is to estimate the run time for a sequence of machining processes. For example:
- How many pieces would have to be made for the cost of the engine lathe to just equal the cost of the turret lathe? This is the BEQ.
- What is the cost per unit at the BEQ?
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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?
Please answer all parts
1. List the operations and the tools needed to make the following shape.2. Find the speed of rotation (RPM N) of each tool during roughing andfinishing.The material of the piece is Stainless Steel (C45) with CARBIDE TOOL.
Chapter 23 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 23 - How is the tool-work relationship in turning...Ch. 23 - What different kinds of surfaces can be produced...Ch. 23 - How does form turning differ from ordinary...Ch. 23 - What is the basic difference between facing and a...Ch. 23 - Which operations shown in Figure 23.3 do not form...Ch. 23 - Why is it difficult to make heavy cuts if a form...Ch. 23 - Show how equation 23.6 is an approximate equation.Ch. 23 - Why is the spindle of the lathe hollow?Ch. 23 - What function does a lathe carriage have?Ch. 23 - Why is feed specified for a boring operation...
Ch. 23 - Why are depths of cut in boring usually smaller...Ch. 23 - How can work be held and supported in a lathe?Ch. 23 - How is a workpiece that is mounted between centers...Ch. 23 - What will happen to the workpiece when turned, if...Ch. 23 - Why is it not advisable to hold hot-rolled steel...Ch. 23 - How does a steady rest differ from a follow rest?Ch. 23 - What are the advantages and disadvantages of a...Ch. 23 - Why should the distance the cutting tool overhangs...Ch. 23 - Prob. 19RQCh. 23 - How can a tapered part be turned on a lathe?Ch. 23 - Why might it be desirable to use a heavy depth of...Ch. 23 - If the rpm for a facing cut (assuming given work...Ch. 23 - Why is it usually necessary to take relatively...Ch. 23 - How does the corner radius of the tool influence...Ch. 23 - What effect does a BUE have on the diameter of the...Ch. 23 - How does the multiple-spindle screw machine differ...Ch. 23 - Why does boring ensure concentricity between the...Ch. 23 - Why are vertical spindle machines better suited...Ch. 23 - Prob. 29RQCh. 23 - Prob. 30RQCh. 23 - In which figures in this chapter is a dead center...Ch. 23 - Prob. 32RQCh. 23 - In which figures in this chapter showing setups do...Ch. 23 - How many form tools are being utilized in the...Ch. 23 - Prob. 35RQCh. 23 - Select the speed, feed, and depth of cut for...Ch. 23 - Calculate the rpm NS to run the spindle on a lathe...Ch. 23 - The lathe in problem 2 has rpm settings of 20, 30,...Ch. 23 - Calculate the cutting time if the length of cut is...Ch. 23 - Calculate the metal removal rate for machining at...Ch. 23 - Determine the speed, feed, and depth of cut when...Ch. 23 - At a speed of 90 fpm, feed of 0.030 ipr, and depth...Ch. 23 - Calculate the cutting time for a 4-in. length of...Ch. 23 - For a boring operation at V=90,fr=0.030, and...Ch. 23 - A cutting speed of 100 sfpm has been selected for...Ch. 23 - The following data apply for machining a part on a...Ch. 23 - A finish cut for a length of 10 in. on a diameter...Ch. 23 - A workpiece 10 in. in diameter is to be faced down...Ch. 23 - A hole 89 mm in diameter is to be drilled and...
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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 20 20 20 20arrow_forwardApplying the technique of tool radius compensation write a program to cut the external profile of the part shown below using the following data: PART TOOL S (rpm) Depth (mm) F (mm/min) 400 130X130X10 mm T1 08 Flat End Mill 2000 10 9 130 P15 P16 R4 P4 P3 P13 P14 R40 P2 PL R30 8 130 20 R4! P12 P11 P7 P8 PO (0, -45, 2) 40 80 Fig.: A Clamping Jaw P5 P6 P10 35 P9 08arrow_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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