Chisel edge and cutting lip shape optimization for improved twist drill point design

This paper investigates the optimization of twist drill point geometries in order to minimize thrust and torque in drilling. A point geometry parameterization based on the drill grinding parameters is used to ensure manufacturability of the optimized geometry. Three commonly used drill point geometr...

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Bibliographic Details
Published in:International journal of machine tools & manufacture 2005-04, Vol.45 (4), p.421-431
Main Authors: Paul, Anish, Kapoor, Shiv G., DeVor, Richard E.
Format: Article
Language:English
Subjects:
Applied sciences
Drill grinding
Drilling
Exact sciences and technology
Mechanical engineering. Machine design
Shape optimization
Thrust and torque
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Description
Summary:This paper investigates the optimization of twist drill point geometries in order to minimize thrust and torque in drilling. A point geometry parameterization based on the drill grinding parameters is used to ensure manufacturability of the optimized geometry. Three commonly used drill point geometries, namely, conical, Racon ® and helical, are optimized for drilling forces while maintaining the inherent characteristics of each of the profiles. A significant reduction is shown in the drilling forces for the optimized drills. Drills with the optimized conical point profile are produced and tests run to validate the reduction in thrust and torque.
ISSN:0890-6955
1879-2170
DOI:10.1016/j.ijmachtools.2004.09.010