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 25, Problem 28RQ
To determine
The pecking action in drilling.
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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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- What benefit does tapping on the drill press offer over hand tapping?arrow_forwardWhat should be done as a drill nears the breakthrough point during drilling?arrow_forward11. With aid of neat sketches, explain the drilling parameters. 12. With aid of neat sketch, explain the main parts of the twist drill cutting tool. 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.arrow_forward
- Briefly contrast the speed and feed differences between drilling and reaming operations.arrow_forwardDecrease of the cutting feed (Vf) in drilling leads to: a/Harder chip evacuation b/Harder chip breaking c/Better surface finish in the machined holearrow_forwardWhat is the function of a drill bushing? In cases where a drill bushing is not used, how is the jig treated to guide the drill?arrow_forward
- With a neat sketch explain the drill bit nomenclature?arrow_forward7. Answer the major functions of a drilling fluid. 8. What are the major categories of drilling fluids based on the continuous-phase? And what are the principal factors for the selection of the type of drilling fluids?arrow_forwarde) Explain the functions of drilling Stabilizers in drill string?arrow_forward
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