A Mechanistic Force Model and Stability Analysis for Contour Turning

The stability variations in axial contour turning are investigated via a frequency domain analysis. Three-dimensional stability-limit diagrams, third dimension being the toolpath, are generated for machining a workpiece with concave-convex contours. The reasons for the stability variations along the toolpath are analyzed in terms of the overlap factor (amount of regeneration) and the cutting stiffness variations. A mechanistic model based force-feedback scheme for disturbance rejection and tracking control in radial contour turning is proposed. The stability issues for the force-feedback design are addressed and the relative tracking performance of acceleration and force feedback controllers at various levels of process parameters (depth of cut, feedrate, etc.) are analyzed.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2001

Author dc:creator

• Reddy, Rohit Gajjela

Contributors dc:contributor

• Kapoor, Shiv G.
• DeVor, Richard E.

• Engineering, Industrial

Language dc:language

eng

Identifier

(MiAaPQ)AAI9996676

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/84018