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TECHNICAL PAPERS

A Chisel Edge Model for Arbitrary Drill Point Geometry

[+] Author and Article Information
Anish Paul, S. G. Kapoor, R. E. DeVor

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

J. Manuf. Sci. Eng 127(1), 23-32 (Mar 21, 2005) (10 pages) doi:10.1115/1.1826076 History: Received May 27, 2003; Revised March 11, 2004; Online March 21, 2005
Copyright © 2005 by ASME
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References

Shaw,  M. C., and Oxford,  C. J., 1957, “On the Drilling of Metals—II. The Torque and Thrust in Drilling,” Trans. ASME, 79, pp. 139–148.
Stephenson,  D. A., and Agapiou,  J. S., 1992, “Calculation of Main Cutting Edge Forces and Torque for Drills With Arbitrary Point Geometries,” Int. J. Mach. Tools Manuf., 32, pp. 521–538.
Chandrasekharan,  V., Kapoor,  S. G., and DeVor,  R. E., 1998, “Mechanistic Model to Predict the Cutting Force System for Arbitrary Drill Point Geometry,” J. Manuf. Sci. Eng., 120, pp. 563–570.
Williams,  R. A., 1970, “A Study of the Basic Mechanics of the Chisel Edge of a Twist Drill,” Int. J. Prod. Res., 8, pp. 325–343.
Armerago,  E. J. A., and Wiriyacosol,  S., 1979, “Thrust and Torque Prediction in Drilling From a Cutting Mechanics Approach,” CIRP Ann., 28, pp. 87–91.
Chandrasekharan,  V., Kapoor,  S. G., and DeVor,  R. E., 1995, “A Mechanistic Model to Predict the Cutting Forces in Drilling: With Application to Fiber Reinforced Composite Materials,” ASME J. Eng. Ind., 117, pp. 559–570.
Elhachimi,  M., Torbaty,  S., and Joyot,  P., 1999, “Mechanical Modeling of High Speed Drilling. 1: Predicting Torque and Thrust,” Int. J. Mach. Tools Manuf., 39, pp. 553–568.
Tsai,  W. D., and Wu,  S. M., 1979, “A Mathematical Model for Drill Point Design and Grinding,” ASME J. Eng. Ind., 101, pp. 333–340.
Galloway,  D. F., 1957, “Some Experiments on the Influence of Various Factors on Drill Performance,” Trans. ASME, 79, pp. 191–231.
Armerago,  E. J. A., and Wright,  J. D., 1980, “An Analytical Study of Three Point Grinding Methods for General Purpose Twist Drills,” CIRP Ann., 29, pp. 5–10.
Watson,  A. R., 1985, “Drilling Model for Cutting Lip and Chisel Edge and Comparison of Predicted and Experimental Results. III—Drilling Model for Chisel Edge,” Int. J. Mach. Tool Des. Res., 25, pp. 377–392.
Oxford,  C. J., 1955, “On the Drilling of Metals—I. Basic Mechanics of the Process,” Trans. ASME, 77, pp. 103–114.
Mauch, C. A., and Lauderbaugh, L. K., 1990, “Modeling the Drilling Process—An Analytical Model to Predict Thrust Force and Torque,” Computer Modeling and Simulation of Manufacturing Processes, ASME PED, Vol. 48.
Kachanov, L. M., 1971, Foundations of the Theory of Plasticity, North-Holland Publishing Company, Amsterdam, pp. 129–139.
Chandrasekharan,  V., Kapoor,  S. G., and DeVor,  R. E., 1996, “A Calibration Procedure for Fundamental Oblique Cutting Coefficients Based on a Three-Dimensional Mechanistic Cutting Force Model,” Trans. NAMRI/SME,XXIV, pp. 39–44.

Figures

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View of the conical chisel edge with the calculated points superimposed
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Workpiece with a protrusion
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Thrust profile using protrusion
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View of the Racon® chisel edge with the calculated points superimposed
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View of the helical chisel edge with the calculated points superimposed
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Thrust profile using pilot-hole
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Effect of feed velocity
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Dynamic cutting angle variation with radial distance on the chisel edge of a Racon® drill
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Dynamic cutting angle variation with radial distance on the chisel edge of a helical drill
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Vectors and angles for a chisel edge element
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Variation of inclination angle with radial distance for different point geometries
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Flank contour simulation
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Conical drill grinding profile
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Ellipsoidal drill grinding profile for a Racon® drill
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Hyperboloidal drill grinding profile
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Flank contour intersections on a conical chisel edge

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