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TECHNICAL PAPERS

Modeling of Forces for Drills With Chip-Breaking Grooves

[+] Author and Article Information
Sushanta K. Sahu

Richard E. DeVor, Shiv G. Kapoor

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

J. Manuf. Sci. Eng 126(3), 555-564 (Sep 07, 2004) (10 pages) doi:10.1115/1.1763183 History: Received January 01, 2003; Revised December 01, 2003; Online September 07, 2004
Copyright © 2004 by ASME
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References

Figures

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Drill coordinate systems
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Chip-Breaker groove location
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Forces acting on an oblique cutting element of a restricted contact drill
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Forces acting on an oblique cutting element of a grooved drill
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Relationship between angle made by the tangent to the chip at groove back-wall and groove geometry
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Lateral, cutting, and vertical forces
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Summary of modeling methodology
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Digital photograph showing three regions in the rake face
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Relationship between land length and chord length
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Contours for thrust (N) at 1300 RPM, 0.2 mm/rev
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Contours for torque (N-cm) at 1300 RPM, 0.2 mm/rev
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Difference in chip size between grooved and ungrooved drills
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Torque contours (N-cm) at speed=1000 RPM, feed=0.16 mm/rev
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Torque contours (N-cm) at speed=1000 RPM, feed=0.22 mm/rev
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Torque contours (N-cm) at speed=1400 RPM, feed=0.16 mm/rev
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Torque contours (N-cm) at speed=1400 RPM, feed=0.22 mm/rev
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Speed and feed conditions for model calibration and validation

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