scholarly journals Development of Dual-Axis MEMS Accelerometers for Machine Tools Vibration Monitoring

2016 ◽  
Vol 6 (7) ◽  
pp. 201 ◽  
Author(s):  
Chih-Yung Huang ◽  
Jian-Hao Chen
Keyword(s):  
Machine Tools ◽  
Vibration Monitoring ◽  
Mems Accelerometers

Special Issue on Multiaxis Control and Multitasking Machining

2017 ◽  
Vol 11 (2) ◽  
pp. 139-139
Author(s):  
Keiichi Nakamoto ◽  
Keyword(s):  
Machine Tools ◽  
Tool Path ◽  
High Accuracy ◽  
Numerical Control ◽  
Plant Production ◽  
Vibration Monitoring ◽  
Practical Case ◽  
Accuracy Evaluation ◽  
Generation Process ◽  
Special Issue

Machine tools using numerical control (NC) devices are typical mechatronics products, and introducing them is a powerful way to automate plant production. NC machine tools in workshops meet the requirements of high accuracy and efficiency in the machining of a variety of parts and mold dies. Turning centers and machining centers are typical examples of such machine tools. Various cutting processes have been integrated in them to cope with the increase in machine parts that not only have complicated geometries but also must be made with high accuracy, in small quantities, and in a short machining time. In addition, turning and machining centers have been given multitasking capabilities, and the number of control axes has been increased so that complex products may be manufactured efficiently. Given that the strong attention and interest in multiaxis control and multitasking machine tools are rapidly increasing, it is fitting that the current state of the art of these tools and their practical and applicable technologies be presented. This special issue features 16 research articles – one review and 15 papers – related to the latest research results and practical case studies in multiaxis control and multitasking machining. Their subjects cover various advances in machine control, motion accuracy evaluation, machining error analysis, chatter vibration monitoring or suppression, trouble-free tool path generation, process planning, and new applications of the machine tools. We thank the authors for their contributions to this special issue, and we are sure that both non-specialists and specialists alike will find the information the authors provide both interesting and informative. Moreover, we deeply appreciate the reviewers for their incisive efforts. Without these contributions, this special issue could not have been realized. We truly hope that this special issue will trigger further research on multiaxis control and multitasking machining.

Vibration monitoring based on MEMS accelerometers

2015 ◽  
Author(s):  
Ibtissem Akacha Helal ◽  
Tan-Hoa Vuong ◽  
Jacques David ◽  
Najiba Mrabet Bellaaj ◽  
Maria Pietrzak-David
Keyword(s):  
Vibration Monitoring ◽  
Mems Accelerometers

The cutting parameters dependent vibration monitoring method for machine tools

2020 ◽  
Vol 148 (4) ◽  
pp. 2793-2793
Author(s):  
Mingxin Hui ◽  
Jing Wang ◽  
Bin Liu ◽  
Xun Wang ◽  
Xiaobin Cheng ◽  
...  
Keyword(s):  
Machine Tools ◽  
Cutting Parameters ◽  
Vibration Monitoring ◽  
Monitoring Method

scholarly journals Systems of automatic vibration monitoring in machine tools

Mechanik ◽  
2017 ◽  
Vol 90 (3) ◽  
pp. 170-175 ◽  
Author(s):  
Piotr Szulewski ◽  
Dominika Śniegulska-Grądzka
Keyword(s):  
Process Parameters ◽  
Machine Tools ◽  
Acoustic Emissions ◽  
Vibration Monitoring ◽  
Monitoring Systems ◽  
Force Sensors ◽  
Status Monitoring ◽  
Chatter Vibrations ◽  
Changing Process

The paper illuminates and discusses some examples of process status monitoring systems in machining. The special techniques based on advanced signals analysis from force sensors, accelerometers, or acoustic emissions are used to detect of chatter vibrations. Monitoring systems could also co-operate with CNC controllers for effective vibration elimination by changing process parameters.

Influence of Chip Serration Frequency on Chatter Formation During End Milling of Ti6Al4V

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Md. Anayet U. Patwari ◽  
A. K. M. Nurul Amin ◽  
Waleed F. Faris
Keyword(s):  
Formation Process ◽  
Chip Formation ◽  
Machine Tools ◽  
End Milling ◽  
Cutting Speed ◽  
Dominant Mode ◽  
Vibration Monitoring ◽  
System Component ◽  
Main Body ◽  
System Components

This paper includes the findings of an experimental study on instabilities of the chip formation process during end milling of Ti6Al4V alloy and the influence of these instabilities on chatter formation. It has been identified that the chip formation process has a discrete nature, associated with the periodic shearing process during machining. The chip formed during machining of titanium alloy Ti6Al4V is found to be mainly with primary serrated teeth appearing in the main body of the chip. Secondary serrated teeth resulting from the coagulation of a certain number of primary serrated teeth also happen to appear at the free or constrained edge of the chip, especially when the system enters into chatter. In order to identify the interaction of these chip instabilities with the prominent natural vibration of the machine tools system components, the different mode frequencies of the vibrating components of the system have been identified using experimental and finite element modal analyses, and vibration responses during actual cutting have also been recorded using an online vibration monitoring system. The vibration signals in frequency domain (fast Fourier transform) have been analyzed to identify the chatter frequencies and the peak amplitude values. Chatter was found to occur at two dominant mode frequencies of the spindle. These mode frequencies at which chatter occurred have been compared with the chip serration frequencies in a wide cutting speed range for different conditions of cutting. It has been concluded from these findings that chatter occurs during end milling due to the resonance of the machine tools system component when the frequency of primary serrated teeth formation is approximately equal to the “prominent natural frequency” modes of the system components, which are the two mode frequencies of the VMC machine spindle in this particular case.

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