Results 191 to 200 of about 1,067 (222)
Some of the next articles are maybe not open access.
Chatterbox: A vibration monitor to detect chattered sections at the ultramicrotome
Journal of Ultrastructure Research, 1973The “chatterbox” is a device for amplifying the vibrations produced as thin sections are cut. With acceptable chatterfree sections a crunching noise is heard; chattered sections produce an audible squeal which is easily distinguished from crunch. With the device the microtomist can determine at the microtome when his sections are chattered, and can ...
C W, McCutchen, L W, Tice, J H, Luft
openaire +2 more sources
Chatter detection in turning using persistent homology
Mechanical Systems and Signal Processing, 2016Abstract 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
Chatter detection by monitoring spindle drive current
The International Journal of Advanced Manufacturing Technology, 1997The 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
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
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 using a microphone
2006In milling operations, chatter vibration is one of the main factors that lower the productivity. This phenomenon is responsible of poor surface quality and increases cutting forces. Higher efforts tend to accelerate tool wear and can lead to tool breakage.
Rivière, Edouard +4 more
openaire +1 more source
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
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
Chatter detection in a five-stand cold mill
Revue de Métallurgie, 1992In 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 +2 more
openaire +1 more source
Acoustic compensation for chatter detection
2015Chatter 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 +3 more
openaire +1 more source
Comparison of on-line chatter detection algorithms in turning
2016 International Symposium on Flexible Automation (ISFA), 2016Dynamic 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 +4 more
openaire +1 more source
Acoustic emission as method of chatter detection in cutting
AIP Conference Proceedings, 2018The possibility of using the acoustic emission method for monitoring the cutting process mode is considered. The influence of mechanical chatter in the technological system on the parameters of acoustic emission signals has been experimentally revealed.
N. N. Shamarin +5 more
openaire +1 more source