Results 21 to 30 of about 905,216 (225)

Integration of dynamic behaviour variations in the stability lobes method: 3D lobes construction and application to thin-walled structure milling [PDF]

, 2006
Vibratory problems occurring during peripheral milling of thin-walled structures affect the quality of the fin- ished part and, to a lesser extent, the tool life and the spindle life.
Arnaud, Lionel, Cazenave-Larroche, Gilles, Dessein, Gilles, Thévenot, Vincent   +3 more
core   +3 more sources

Chatter Identification in Milling of Titanium Alloy Using Machine Learning Approaches with Non-Linear Features of Cutting Force and Vibration Signatures

International Journal of Prognostics and Health Management
The generation of chatter during machining operations is extremely detrimental to the cutting tool life and the surface quality of the workpiece. The present study aims to identify chatter conditions during the end milling of Ti6Al4V alloy.
Viswajith S Nair, R. K, S. S
semanticscholar   +1 more source

On the stability of high-speed milling with spindle speed variation [PDF]

, 2010
Spindle speed variation is a well-known technique to suppress regenerative machine tool vibrations, but it is usually considered to be effective only for low spindle speeds.
BP Mann, E Al-Regib, E Budak, E Solis, F Yang, Gilles Dessein, Grégoire Peigné, GS Duncan, H Paris, H Zhang, J Tlusty, J Tlusty, JS Sexton, JS Sexton, JS Sexton, Lionel Arnaud, M Zatarain, MA Davies, ML Campomanes, ND Sims, PV Bayly, R Radulescu, RPH Faassen, S Jayaram, S Sastry, S Seguy, S Seguy, S Smith, SA Tobias, SC Lin, SD Merdol, Sébastien Seguy, T Insperger, T Insperger, T Insperger, T Insperger, T Surmann, T Takemura, Tamás Insperger, TC Tsao, XH Long, Y Altintas, Y Altintas, Y Altintas   +43 more
core   +4 more sources

Chatter detection in simulated machining data: a simple refined approach to vibration data

The International Journal of Advanced Manufacturing Technology
Vibration monitoring is a critical aspect of assessing the health and performance of machinery and industrial processes. This study explores the application of machine learning techniques, specifically the Random Forest (RF) classification model, to ...
Matthew Alberts, Sam St. John, Bradley Jared, Jaydeep Karandikar, Anahita Khojandi, Tony Schmitz, J. Coble   +6 more
semanticscholar   +1 more source

PID‐Like Robust Control of Non‐Minimum Phase Robotic Manipulators

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper proposes an output‐feedback tracking controller for non‐minimum phase nonlinear systems with unknown uncertainties and external disturbances, where not all states are measurable, and the zero dynamics are unstable. The approach combines a backstepping‐based stabilizing state‐feedback law with a cascade extended high‐gain observer ...
Mohammad Al Saaideh, Almuatazbellah Boker, Mohammad Al Janaideh   +2 more
wiley   +1 more source

EVALUATION OF CHATTER VIBRATION FREQUENCY IN CNC TURNING OF 4340 ALLOY STEEL MATERIAL [PDF]

, 2017
In this study, an experimental investigation of chatter in CNC turning for 4340 Alloy Steel material was carried out. Empirical study of chatter and critical cutting condition in CNC turning has been conducted through a well- designed three-factor three ...
Nwoke , Obinna N., Okafor , Christian E., Okokpujie , Imhade P., Okonkwo , Ugochukwu C.   +3 more
core  

Lady Anne Kerr: From the Rise of International Conference Interpreting to the Whitlam Dismissal

Australian Journal of Politics &History, EarlyView.
Before Anne Robson (née Taggart) became the second Lady Kerr upon marrying governor‐general John Kerr in 1975, she had an international career of some 30 years working as a French to English interpreter and consultant at over 30 national and international conferences and became the first Australian elected to the International Association of Conference
Alexis Bergantz
wiley   +1 more source

Time domain simulation of chatter vibrations in indexable drills [PDF]

The International Journal of Advanced Manufacturing Technology, 2016
Regenerative chatter vibrations are common in drilling processes. These unwanted vibrations lead to considerable noise levels, damage the quality of the workpiece, and reduce tool life. The aim of this study is to simulate torsional and axial chatter vibrations as they play important roles in dynamic behavior of indexable insert drills with helical ...
Amir Parsian, Martin Magnevall, Mahdi Eynian, Tomas Beno   +3 more
openaire   +4 more sources

Red era: Dyeing yak hair fibres red with in situ generated silver nanoparticles using silver nitrate and a flavonoid‐containing plant extract

Coloration Technology, EarlyView.
Abstract Plants and their extracts have been used for dyeing fabrics, skin and hair for thousands of years and have been experiencing a revival in the last years due to increasing health risks arising from oxidative hair dye precursors. We developed a novel two‐step method to dye keratin fibres based on in situ formed silver nanoparticles including a ...
Julia K. Hachmann, Jule M. Sauler, Charlotte Ruhmlieb, Volkmar Vill, Fabian Straske   +4 more
wiley   +1 more source

Reinventing henna: Enzyme‐catalysed colour release from stabilized Lawsonia inermis L. extracts

International Journal of Cosmetic Science, EarlyView.
The instability and reduced dyeing performance of a cosmetic formulation containing 2‐hydroxy‐1,4‐naphthoquinone (lawsone), derived from Lawsonia inermis L., is demonstrated in comparison to a novel two‐component system. This system comprises one formulation with naturally occurring lawsone precursors and a second containing a specific hydrolase ...
Nele Dallmann, Volkmar Vill, Fabian Straske   +2 more
wiley   +1 more source