Chapter 78 Machine Tool Noise, Vibration and Chatter Prediction and Control

Document type: Bookchapters
Author(s): Lars Håkansson, Sven Johansson, Ingvar Claesson
Title: Chapter 78 Machine Tool Noise, Vibration and Chatter Prediction and Control
Book: HANDBOOK OF NOISE AND VIBRATION CONTROL
Year: 2005
Editor: Malcolm J. Crocker
Publisher: To be published by by John Wiley & Sons
City: New York
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: lha@bth.se, sjo@bth.se, icl@bth.se
Language: English
Abstract: A frequent problem in the manufacturing industry today is the vibrations or chatter induced by metal cutting, e.g. turning, milling and boring operations.
Vibrations in boring operations or internal turning operations, for example,are inevitable and constitute a major problem for the manufacturing
industry. Tool vibrations in metal cutting affect the result of machining, particularly the surface finish. Furthermore, tool life is correlated with the degree
of vibration and acoustic noise introduced. Generally, tool vibrations are related to a low-order bending mode of, for example, the tool holder shank in external turning, the boring bar in internal turning, spindle-cutter assembly in milling, etc.
Tool chatter or vibration problems in internal turning or milling may be reduced, for example, by using boring bars and milling adapters with passive tuned dampers. These are usually manually tuned to increase the dynamic stiffness of the boring bar or milling adapter at one of the eigenfrequencies of its low-order bending modes. Active control approaches for the attenuation of the bending motion of boring bars, tool holder shanks and spindle-cutter assembly in milling have been developed; such approaches involve both adaptive and time-invariant feedback control.
In addition, prediction and control methods for controlling cutting data to maintain stable cutting, i.e. to avoid cutting data resulting in chatter, have been developed.
Subject: Signal Processing\Active Noise and Vibration Control
Mechanical Engineering\Structural Dynamics
Mechanical Engineering\General
Edit