Results 221 to 230 of about 1,458 (251)

Beat Effect in Machining Chatter: Analysis and Detection

Journal of Manufacturing Science and Engineering, 2020
Abstract In machining processes, regenerative chatter is an unstable vibration which adversely affects surface finish, cutting tools, and spindle bearings. Under some cutting conditions, the beat effect, an interference pattern between two periodical vibrations of slightly different frequencies, has been a common phenomenon where the ...
Yuxin Sun, Longyang Ding, Chao Liu, Zhenhua Xiong, Xiangyang Zhu   +4 more
openaire   +1 more source

Chatter detection by monitoring spindle drive current

The International Journal of Advanced Manufacturing Technology, 1997
The purpose of this work is to investigate a new method for detecting chatter in milling. In this method, the spindle drive current signal of a vertical milling machine is used for monitoring process instability. Both simulations and experimental work are conducted. Results show that current signals can transmit chatter frequencies reliably.
E. Soliman, F. Ismail
openaire   +1 more source

Chatter detection in turning using persistent homology

Mechanical Systems and Signal Processing, 2016
Abstract This paper describes a new approach for ascertaining the stability of stochastic dynamical systems in their parameter space by examining their time series using topological data analysis (TDA). We illustrate the approach using a nonlinear delayed model that describes the tool oscillations due to self-excited vibrations in turning.
Firas A. Khasawneh, Elizabeth Munch
openaire   +1 more source

A New Method to Detect Regenerative Chatter Using Spectral Analysis, Part 1: Basic Study on Criteria for Detection of Chatter

Journal of Manufacturing Science and Engineering, 1997
The purpose of this study is to introduce a new criterion for detecting regenerative chatter by application of spectral analysis. From the regenerative chatter theory, it can be seen that the vibration amplitude perpendicular to a workpiece surface comes equal to the amplitude of surface undulation at the stability limit.
E. Kondo, H. Ota, T. Kawai
openaire   +1 more source

Chatter detection in a five-stand cold mill

Revue de Métallurgie, 1992
In high speed, cold mill mechanical vibrations generate chatter. This defect is to be avoided to prevent the production of unacceptable sheets and damages to the mill components. The so-called chatter of the third octave mode results in severe gage variations. The chatter of the fifth octave mode develops marks on the rolls. Hoogovens has studied those
J.C. Groothuizen, L.J. van Egmond, G. van Steden   +2 more
openaire   +1 more source

Comparison of on-line chatter detection algorithms in turning

2016 International Symposium on Flexible Automation (ISFA), 2016
Dynamic instability in the form of chatter is a highly undesirable phenomenon that occurs during machining, resulting in poor surface finish and reduced tool life. Though analytical models exist for identifying conditions that avoid chatter, they do not account for process uncertainties or they require extensive cutting tests.
Vinh Nguyen, Shreyes Melkote, Amar Deshamudre, Maneesh Khanna, Dan Walker   +4 more
openaire   +1 more source

A New Method to Detect Regenerative Chatter Using Spectral Analysis: Part I — Basic Study on Criteria for Detection of Chatter

Manufacturing Science and Engineering: Volume 1 — Material Removal and Surface Modification Issues in Machining Processes; Mechatronics for Manufacturing; Computer-Aided Tooling, 1995
Abstract The purpose of this study is to find a new approach for detecting regenerative chatter by application of spectral analysis. From the regenerative chatter theory, it can be seen that the vibration amplitude perpendicular to a workpiece surface, comes equal to the amplitude of surface undulation at the stability limit.
Eiji Kondo, Hiroshi Ota, Tadao Kawai
openaire   +1 more source

Acoustic compensation for chatter detection

2015
Chatter detection has assumed a central role in monitoring of machining operations. Defining optimal detection algorithm is still an open task, besides performances of these algorithms strongly rely on employed sensors: microphone sensors are gathering growing interest in this scenario, mainly due to low cost and ease of integration into machine tool ...
SALLESE, LORENZO, GROSSI, NICCOLO', SCIPPA, ANTONIO, CAMPATELLI, GIANNI   +3 more
openaire   +1 more source

Use of Audio Signals for Chatter Detection and Control

Journal of Engineering for Industry, 1992
This paper compares various sensors and shows that a microphone is an excellent sensor to be used for chatter detection and control. Comparisons are made between the microphone and some other common sensors (dynamometers, displacement probes, and accelerometers) regarding sensing of unstable milling.
S. Smith, J. Tlusty, T. Delio
openaire   +1 more source

Chatter Detection and Identification Based on Mode Decompositions

Advanced Engineering Materials
To meet the demand for industrial production of calendering or rolling, it is necessary to detect the onset of chatter before chatter marks appear on the workpiece. Therefore, mode decomposition techniques (empirical, bivariate empirical, and variational) combined with machine learning (ML) are used to detect impending failures.
Surya Kannan Peesapati, Josef Prost, Georg Vorlaufer, Markus Varga, Carsten Gachot   +4 more
openaire   +1 more source