Estimation and improvement of cutting safety
Sign Up to like & getrecommendations! Published in 2019 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-019-04980-0
Abstract: This paper estimates cutting safety by using basin stability and introduces state-dependent intermittent controls to improve it. Due to inherent nonlinearity and non-smoothness in tool–workpiece interactive forces, metal cutting processes often exhibit subcritical instability when… read more here.
Keywords: estimation improvement; cutting safety; stability; safety ... See more keywords
Hybrid model- and signal-based chatter detection in the milling process
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Mechanical Science and Technology"
DOI: 10.1007/s12206-019-1201-5
Abstract: Chatter causes machining instability and reduces productivity in the metal cutting process. It has negative effects on the surface finish, dimensional accuracy, tool life and machine life. Chatter identification is therefore necessary to control, prevent,… read more here.
Keywords: model; chatter; chatter detection; signal based ... See more keywords
A new ensemble approach to explore stability features in turning operation on CNC lathe
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Mechanical Science and Technology"
DOI: 10.1007/s12206-021-0605-1
Abstract: Objective of the present study is to determine an optimum range of turning parameters using merged wavelet denoising and local mean decomposition (WDLMD) technique in order to establish stable turning settings in computer numerical control… read more here.
Keywords: approach explore; cnc lathe; ensemble approach; new ensemble ... See more keywords
Boring Bar Chatter Control using Feedback Filtered-x Normalized Least Mean Square Algorithm
Sign Up to like & getrecommendations! Published in 2019 at "IFAC-PapersOnLine"
DOI: 10.1016/j.ifacol.2019.10.057
Abstract: Abstract This paper deals with the adaptive control of chatter vibrations in boring operations. A novel feedback control method is suggested based upon the well-known filtered-x normalized least mean square (FxNLMS) algorithm. The proposed feedback… read more here.
Keywords: control; feedback; mean square; controller ... See more keywords
Safety estimation for a new model of regenerative and frictional cutting dynamics
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Mechanical Sciences"
DOI: 10.1016/j.ijmecsci.2021.106468
Abstract: Abstract In our previous study on regenerative and frictional cutting dynamics, a new model considering both time-delayed regenerative effect and Stribeck effect as sources of cutting instability has been proposed [7], which has improved the… read more here.
Keywords: frictional cutting; new model; regenerative frictional; cutting dynamics ... See more keywords
Efficient active chatter mitigation for boring operation by electromagnetic actuator using optimal fractional order PDλ controller
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Materials Processing Technology"
DOI: 10.1016/j.jmatprotec.2019.116423
Abstract: Abstract Due to the factor of limited rigidity of boring bars, small depths of cutting are normally applied for chatter free machining. Stability lobe diagrams can truly represent that limit. However, due to the presence… read more here.
Keywords: order controller; fractional order; active chatter; controller ... See more keywords
Two new kurtosis-based similarity evaluation indicators for grinding chatter diagnosis under non-stationary working conditions
Sign Up to like & getrecommendations! Published in 2021 at "Measurement"
DOI: 10.1016/j.measurement.2021.109215
Abstract: Abstract Chatter is one of the most critical errors in the grinding process, the occurrence of which will directly degrade the ultimate geometrical surface quality of the workpiece. Most of the present grinding chatter detection… read more here.
Keywords: grinding chatter; non stationary; working conditions; chatter detection ... See more keywords
Chatter identification in flank milling of thin-walled blade based on fractal dimension
Sign Up to like & getrecommendations! Published in 2020 at "Procedia Manufacturing"
DOI: 10.1016/j.promfg.2020.07.011
Abstract: Abstract Chatter is a kind of self-vibration with unstable behavior, and chatter identification is crucial in the machining process to ensure a better surface quality. In this work, vibration signals are obtained in different chatter… read more here.
Keywords: flank milling; chatter identification; milling thin; fractal dimension ... See more keywords
Frequency domain analysis of regenerative chatter in machine tools with Linear Time Periodic dynamics
Sign Up to like & getrecommendations! Published in 2019 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2018.10.029
Abstract: Abstract Unstable vibrations (Chatter) during machining operations is caused by the flexibility of various components of the machine tool or the workpiece, which can be stationary and symmetrical or rotating and non-symmetrical. Therefore, the structural… read more here.
Keywords: time periodic; regenerative chatter; machine; linear time ... See more keywords
Fuzzy control of milling chatter with piezoelectric actuators embedded to the tool holder
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2020.107190
Abstract: Abstract Chatter is a typical kind of self-excited vibration occurred in the machining process. It not only results in inferior workpiece, but also shorts the life of the tool. It has become one of the… read more here.
Keywords: tool holder; control; chatter; piezoelectric actuators ... See more keywords
A new approach to explore tool chatter in turning operation on lathe
Sign Up to like & getrecommendations! Published in 2019 at "Australian Journal of Mechanical Engineering"
DOI: 10.1080/14484846.2019.1583713
Abstract: ABSTRACT Tool chatter is an ineluctable phenomenon encountered frequently in turning process. In the present work, statistical approach along with signal pre-processing has been adopted to explore the mechanism of tool chatter in turning operation.… read more here.
Keywords: turning operation; tool chatter; chatter turning; approach ... See more keywords