DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 25, Problem 16RQ
To determine
The difference between multiple spindle drilling machine and a numerical control (NC) drilling machine with a tool changer.
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13. With aid of neat sketch, explain the point angle of the twist drill.
14. With aid of neat sketch, explain what is the difference between the counter boring
and counter sinking.
15. Define “NC" and "CNC" Terms.
Chapter 25 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 25 - What functions are performed by the flutes on a...Ch. 25 - What determines the rake angle of a drill? See...Ch. 25 - Basically, what determines what helix angle a...Ch. 25 - When a large-diameter hole is to be drilled, why...Ch. 25 - Equation 25.4 for the MRR for drilling can be...Ch. 25 - Are the recommended surface speeds for spade...Ch. 25 - What can happen when an improperly ground drill is...Ch. 25 - Why are many drilled holes oversize with respect...Ch. 25 - What are the two primary functions of a...Ch. 25 - What is the function of the margins on a twist...
Ch. 25 - What factors tend to cause a drill to drift off...Ch. 25 - The drill shown in Figure 25.13 has coolant...Ch. 25 - Prob. 13RQCh. 25 - Why do cutting fluids for drilling usually have...Ch. 25 - How does a gang-drilling machine differ from a...Ch. 25 - Prob. 16RQCh. 25 - How does the thrust force vary with feed? Why?Ch. 25 - Holding the workpiece by hand when drilling is not...Ch. 25 - Prob. 19RQCh. 25 - In terms of thrust, what is unusual about the...Ch. 25 - Prob. 21RQCh. 25 - Prob. 22RQCh. 25 - What are the primary purposes of reaming?Ch. 25 - What are the advantages of shell reamers?Ch. 25 - A drill that operated satisfactorily for drilling...Ch. 25 - What precautionary procedures should be used when...Ch. 25 - What is the advantage of a spade drill? Is it...Ch. 25 - Prob. 28RQCh. 25 - Why does drill feed increase with drill size?Ch. 25 - Suppose you specified a drilling feed rate that...Ch. 25 - Suppose you wanted to drill a 1.5-in.-diameter...Ch. 25 - How much time will be required to drill the hole...Ch. 25 - What is the metal removal rate when a...Ch. 25 - If the specific horsepower for the steel in...Ch. 25 - If the specific power of an AISI 1020 steel of...Ch. 25 - Prob. 6PCh. 25 - Assume that you are drilling eight holes, equally...Ch. 25 - What machining difficulties should this process...Ch. 25 - Why were the distances between the holes too...
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- Decrease of the cutting feed (Vf) in drilling leads to: O Better surface finish in the machined hole O Harder chip evacuation Harder chip breakingarrow_forwardIncrease of the cutting speed (Vc) in drilling leads to: Increased chance for tool breakage Higher tool wear Decrease of material removal Which of the described below does not affects the chip forming: Depth of cut Vibrations O Feedingarrow_forward7. What are the main differences between the twist drill and the end mill cutting tools? 8. What are the different methods to fix the wp on the milling machine? 9. With the aid of net sketches, state the different milling operations on the vertical milling machine. 10. With aid of neat sketch, explain the milling parameters. 11. With aid of neat sketches, explain the drilling parameters.arrow_forward
- Compare any ten major differences between Milling machine and Drilling machinearrow_forward2. Discuss the difference between upright drilling machines with radial arm drilling machine with neat picture?arrow_forwardWhat are two reasons boring may be selected to produce a hole instead of drilling and reaming?arrow_forward
- Calculate spindle RPM and machining time for cutting a 1.5" diameter 4" long at 225 SFPM using a feed rate of 0.004".arrow_forward1. 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.arrow_forwardIDENTIFY THE PARTS & FUNCTIONS OF LATHE MACHINE WITH PHOTOS.arrow_forward
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