Chapter24ba

Chapter24ba - _ Materials & Processes in Manufacturing ME...

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©2003 Bil Young 1 ME 151 Chapter 24 Drilling and Related Hole Making Processes ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 2 Introduction Drilling is the most common method of producing a hole Drilling makes up 25% of all machining operations _________________ with several inherent problems: Cutting edges at the end of a relatively flexible tool Cutting action takes place inside the workpiece Exit for the chips is limited by the tool Friction produces additional heat Drill accuracy and precision depend on: Drill point ___________ and ____________ (Angles, Edge) Drilling machine tool (Drill Press, Lathe, Machining Center) Workholding device (Vise, Fixture) Drill holder (Chuck, Adapters, Spindle) Surface of the workpiece (Hard Spots, Sand Pockets, Mill Scale) ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 3 Types of Drills •_ _ _ _ _ _
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This note was uploaded on 04/19/2008 for the course ME 151 taught by Professor Alant.male during the Spring '08 term at Kentucky.

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Chapter24ba - _ Materials & Processes in Manufacturing ME...

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