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 30RQ
To determine
The held of the work-piece in the figure 23.13.
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Sketch and explain any four Shaper operations?
How did you find out the angle was 90 and how can you find that for other problems?
A NC lathe cuts two passes across a cylindrical workpiece under automatic cycle. The operator loads and unloads the machine. The starting diameter of the work is 3.00 in and its length = 10 in. The work cycle consists of the following steps (with element times given in parentheses where applicable):
1 - Operator loads part into machine, starts cycle (1.00 min);
2 - NC lathe positions tool for first pass (0.10 min);
3 - NC lathe turns first pass (time depends on cutting speed);
4 - NC lathe repositions tool for second pass (0.4 min);
5 - NC lathe turns second pass (time depends on cutting speed); and
6 - Operator unloads part and places in tote pan (1.00 min).
In addition, the cutting tool must be periodically changed. This tool change time takes 1.00 min. The feed rate = 0.007 in/rev and the depth of cut for each pass = 0.100 in. The cost of the operator and machine = $39/hr and the tool cost = $2.00/cutting edge. The applicable Taylor tool life equation has parameters: n = 0.26 and…
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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- enumerate the 4 plate forming process and where it can be applied.arrow_forwardThank you, Could you help me with Problem 60 as well?arrow_forward1. 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!arrow_forward
- How are flanged edges formed?arrow_forwardQ.4- Write (True) or (False) and correct the wrong sentences for the following: 1. Chills are used to increase the heating rate of metal. 2. Motion of job is forward rotary in broaching operation. 3. The upset type of forging makes increment in the diameter of the workpiece. (1-2) Option 1 4. The torch size of (GTAW) process is larger than other (PAW) process. 5. Only two perpendicular components of cutting force act on the tool in case of oblique cutting. 6. The semicentrifugal casting, is used for casting articles of symmetrical shape about vertical axis. 7. In planer machine tool, workpiece remains stationary and tool reciprocates. 8. Boring is performed on the inside diameter of an existing hole. 9. In grinding processes, small grit sizes used to grind soft materials and permit larger material removal rates. 10. Side rake angle on tools is provided to control chip flow.arrow_forwardDescribe how a sub-spindle can be used to increase productivity.arrow_forward
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