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TECHNICAL PAPERS

Topology of Spade Drills for Wood Drilling Operations, Part 1: Spade Drill Point Geometry Definition

[+] Author and Article Information
Hanxin Zhao, Kornel F. Ehmann

Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston IL, 60208-3111

J. Manuf. Sci. Eng 127(2), 298-309 (Apr 25, 2005) (12 pages) doi:10.1115/1.1794160 History: Received October 16, 2001; Revised March 17, 2003; Online April 25, 2005
Copyright © 2005 by ASME
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References

Figures

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Conventional twist drill
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Generalized helical spade bit geometry
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Generalized straight spade bit geometry
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Helical surface generation model
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Helical surface generation by (a) Z-shaped and (b) S-shaped generators
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Flank surface generation model
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Generation of a planar tip and of a circular major cutting edge flank surface
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Microgroove generation model
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Microgroove generator for the tip
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Microgroove generator model for straight spade bits

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