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Displaying 76 - 88 of 88

The Stability of Low Radial Immersion Milling

January 1, 2000
Author(s)
Matthew A. Davies, Jon R. Pratt, Brian S. Dutterer, Timothy J. Burns
Traditional regenerative stability theory predicts a set of spindle speeds with locally optimum stability at integer fractions of the natural frequency of the most flexible mode of the system. The assumptions of this theory become invalid for highly

On the Bifurcation from Continuous to Segmented Chip Formation in Metal Cutting

March 4, 1998
Author(s)
Timothy J. Burns, Christopher J. Evans, Matthew A. Davies
We describe a new approach to modeling chip formation in orthogonal machining. Metal cutting is interpreted as a nonlinear dynamical process with thermomechanical feedback, which is similar in many ways to an open chemical reactor. As the cutting speed is

Nonlinear Dynamics Model for Chip Segmentation in Machining

November 30, 1997
Author(s)
Timothy J. Burns, Matthew A. Davies
We have developed a new model for chip formation in machining which includes a mechanism for thermomechanical feedback. This leads to an interpretation of metal cutting as a process which is similar in many ways to an open chemical reactor. As the cutting

On the Dynamics of Chip Formation in Machining Hard Metals

January 1, 1997
Author(s)
Matthew A. Davies, Timothy J. Burns, Christopher J. Evans
The results of orthogonal cutting tests on electroplated Nickel-Phosphorus (15% phosphorus) and AISI 52100 bearing steel are presented and compared. For both materials, chips become segmented at relatively low cutting speeds (0.3 m/s to 2 m/s) due to the

The dynamics of chip formation in machining

January 1, 1997
Author(s)
Matthew A. Davies, Christopher J. Evans, Timothy J. Burns
In this paper, we provide experimental, numerical and analytical evidence suggesting that the onset of segmented chip formation is the result of a Hopf bifurcation in the material flow. We modify the conventional one-dimensional model for orthogonal