The Burrs from Drilling THE BURRS FROM DRILLING
Dr. J.M. Stein
111 pages, hardbound,illustrated with index
published by Deburring Technology Inc.
$90 Available through the Abrasive Engineering Society
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The most comprehensive study ever published on burrs produced by drilling,this book is the work of Dr. Julie Stein who spent two years researching such burrs and how to minimize them. This unique book summarizes Dr. Stein's work and the work of others in an easy to read and statistically defensible discussion. With stainless steel as the primary focus of the books, photos, tables, and graphs characterize burrs and drill geometry’s, drilling conditions, and part geometry. Noteworthy is the work on intersecting holes. Her work on classifying the different types of burrs and their formation mechanisms are the basis for portions of the international standard for nomenclature. See also the Worldwide Burr Technology Committee .


About the author
Julie Stein is a Mechanical Engineering graduate from the University of California at Berkeley and recently received her PhD. She was a leader in the Consortium for Deburring and Edge Finishing [CODEF] and works with major corporations in the US in burr prevention, and burr formation research and application. Julie Stein writes and works at a level that typical engineers can appreciate. Her consulting work puts her in touch with industry needs and the work of others in burr research.


TABLE OF CONTENTS

Introduction to Burr Control

Background On Drilling And Drilling Burrs
Introduction
Background on the Drilling Process
The Drilling Process
Drill wear and drill failure
Miniature and Micro-hole
Vibratory Drilling
Characterization of the Burrs in Drilling
Drilling Burr Formation Process
Drilling Burr Geometry
Analytical Modeling of Drilling Burr Formation
Experimental Investigations of Drilling Burrs
The Burrs from Non-precision Drills
The Burrs from Miniature and Micro-Drills
The Burrs from Drilling Intersecting Holes
Drilling Burr Minimization Techniques
Deburring Drilling Burrs in Precision Components
Conclusion
Characterization of Drilling Burrs
The Properties of 304L Stainless Steel
Precision Drilling Burrs in 304L Stainless Steel, Brass and Aluminum
Cap Formation and Uniform Burrs
Crown Burrs
Petal Burrs
Rolled back Burrs
Burrless Regions and Exaggerated Crown Burrs
Qualitative Burr Characterization as a Function of Dn~ Geometry
Drilling Burr Measurement Issues and Techniques
Drilling Burr Properties
Qualitative Drilling Burr Measurement Techniques
Quantitative Measurement Techniques for Drilling Burr Height
Quantitative Measurement Techniques for Drilling Burr Thickness
Quantity of Measurements per Hole and Replication of Tests
Quantitative Characterization of Drilling Burrs in 304L Stainless Steel
Measurement Procedure
Burr Height and Burr Thickness Measurement
Relationship between Burr Height and Burr Thickness
Relationship of Burr Height and Thickness to Burr Volume and Mass
Conclusions
Preliminary Study of Drilling Burr Formation
Introduction
Selection of Drilling Parameters
Drill Geometry
Cutting Speed and Feed per Revolution
Experimental Procedure
Drilling Fixture Design
Drilling Procedure
Drill Changing and Drill Breakage
Drilling Burr Measurements and Results
Raw Data Characterization
Average Burr Height and Thickness Variation
Influence of Drill Wear and Breakage on Burr ize
Influence of Feed on Burr Size
Influence of Spindle Speed on Burr Size
Influence of Feed and Cutting Speed on Burr Geometry
Drilling Process Design Parameters for Burr Size Prediction 54
Conclusions
A Fractional Factorial Experiment Design
Introduction
Review of Designed Experiments on Drilling Burr Formation
Motivation for Performing this Designed Experiment
The Fractional Factorial Experimental Design
Selection of Burr Formation Factors for the Experiment
Description of Factor Level Choices
The Fractional Factorial Design Array
Experimental Procedure and Randomization
Drilling Test Results and Measurements
Main Factor and Two-Factor Interaction Effects
Analysis of Variance and Significance of the Effects
ANOVA: Decomposition of the Variation in the Experiment ANOVA of the Main
Effects and the Factor Interaction Effects
Discussion of the Significant Main and Interaction Effects The Main Effect of Feed
The Main and Interaction Effects of Cutting Speed
The Main Effect of Drill Wear
Empirical Model from the Designed Experiment
Transformations for Stabilization of the Variance
Conclusions
Burr Formation in Intersecting Holes\
Introduction
Workpiece Exit Angles in Drilling Intersectihg Holes
The Fractional Factorial Experimental Design
Selection of Burr Formation Factors and Experimental Design
Description of Factor Level Choices
Experimental Procedure
Burr Measurement Response Variables
Burr Measurements and Burr Sliape Observations
Calculation of Burr Size Effects and Analysis of Variance Results
Discussion of the Significant Main Effects and Interaction Effects
The Main Effects on Burr Height
The Interaction Effects on Burr Height
The Main Effects and Interaction Effects on Burr Thickness
Qualitative Effect of Workpiece Exit Angle Variation in Drilling
Quantitative Effects of Workpiece Exit Angle Variation in Drilling
Influence of Hole Depth, Cutting Speed and Cutting Temperature on Burr Formation
Conclusions


Questions? As the Abrasive Engineerings Society order request
© 2013 Abrasive Engineering Society
rev 1/12/2013