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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Textbook Question
Chapter 24, Problem 8RQ
Why does down milling dull the cutter more rapidly than up milling when machining sand castings?
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The tailstock has tow major part a bottom casting and a top casting.The bottom casting is machined very accurately to fit the ways of the lathe (a) dogs (b)bed (c) carriage (d)mandrel
04
05
a Explain the reasons for the following:
1- The pure aluminum and the copper are generally rated as easy to
machine
2- In ultrasonic machining, the stress produced by the impact of abrasive
particles on the workpiece surface is high.
3- In rolling process, the coefficient of friction must be sufficient.
4- Difference in solidification between casting and welding processes.
5- Why is it desirable to use energy sources for welding that have high heat
densities?
6- Why there might be a change in the density of a forged product as
compared to that of the cast blank.
D. A cylindrical workpart with D=2.5 in and h=2.5 in is upset forged in an open
die to a height = 1.5 in. Coefficient of friction at the die -work interface = 0.10
The work material has a flow curve defined by: K= 40,000 lb/in' and n-0.15.
Determine the instantaneous force in the operation (a) just as the yield point
is reached (yield at strain = 0.002), (b) at height = 2.3 in. (c) h= 1.9 in, and
(d) h = 1.5 in.
a List…
The tailstock has two major parts a bottom casting and a top casting is machined very accurately to fit the ways of the lathe [(a dogs (b) bed (c) carriage (d) mandrel
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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- 2.14 W hy is cBN generally preferred over diamond for machining steels?arrow_forwardCan cast iron be machined without using any cutting fluid? (Yes or No)arrow_forward1. A milling operation is to be performed on a ductile cast iron shaft to make slots for assembly. The operation will be done at high speeds for good surface finish. For each of the following tool materials, indicate whether it is a reasonable candidate to use in the operation with a detailed description of why or why not including required alloying element/grade/group etc. where applicable: ) plain carbon steel, (i) high-speed steel, (ii)cemented carbide, (iv) ceramic, and (v) Sintered polycrystalline diamond. After selection of material/materials discuss about ) recommended angles and tool signature (ii) how to held cutting edge, and type of cutting fluids With reasons for each recommended material.arrow_forward
- 1. A milling operation is to be performed on a ductile cast iron shaft to make slots for assembly. The operation will be done at high speeds for good surface finish. For each of the following tool materials, indicate whether it is a reasonable candidate to use in the operation with a detailed description of why or why not including required alloying element/grade/group etc. where applicable: (i) plain carbon steel, (ii) high-speed steel, (iii) cemented carbide, (iv) ceramic, and (v) Sintered polycrystalline diamond. After selection of material/materials discuss about (i) recommended angles and tool signature (ii) how to held cutting edge, and type of cutting fluids With reasons for each recommended material. 2. Make a figure and explain how shear plane angle effect the power requirements in the machining. How can you reduce the power requirements during machining in orthogonal cutting?arrow_forwardWhat is the primary trend in yep-yeg versus with water depth?arrow_forwardWhy should the sample be rotated 90 after each milling step? Explained in detailarrow_forward
- Which two types of casting processes are least likely to need subsequent machining?arrow_forwardQuestions: 1. a) With a neat diagram briefly explain about centrifugal casting process. b) Write any four applications of centrifugal casting process. 2. a) With a neat diagram briefly explain the principle of operation of Shaping machine. b) Write any four comparisons between a shaper and a planer. 3. a) With a neat diagram briefly explain about surface grinding operation. b) Write any two applications of surface grinding operation.arrow_forwardIDENTIFICATION: ___________1. It is also known as roll forming. ___________2. It is the most common cold extrusion process. ___________3. This process is the most rapid method of converting large sections into desired shapes. ___________4. This method is uses for production of hollow castings without the use of cores. ___________5. A die is usually made in two halves, What is the movable half called?arrow_forward
- Need both parts correctly in neat and clean handwritten solution. I will upvote surelyarrow_forwardA drill bit of 10mm diameter rotating at 500 rpm with a feed rate of 0.2 mm/revolution is used to drill a through hole in Mild Steel plate of 20mm thickness. The depth of cut in this drilling operation is; 0.5 mm 5 mm 10 mm O 20 mm In sand casting process the be designed to freeze after the main casting in order to satisfy its function. Chill Runner Sprue O Riser must *arrow_forwardMain characteristic when cutting Cast Iron ISO K is: K Machining at higher speeds creates abrasive wear Difficult chip control (segmented chips) Extreme cutting forces and power requiredarrow_forward
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