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Articles de revues sur le sujet « Chatter suppression »

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Auteur : Grafiati
Publié le 10 mars 2023

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1

Zhang, Li Ying, Jin Hui Li et Jun Tao Hu. « The Motional Stability Analysis and Optimal Design of Built-In Chatter Suppression Boring Bar ». Advanced Materials Research 694-697 (mai 2013) : 430–35. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.430.

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On the basis of the Mechanics and Kinematics analysis of built-in chatter suppression boring bar, the research analyzes the motional stability of built-in chatter suppression boring bar, and uses SIMS vibration absorbers for chatter suppression theory to design the characteristic parameters of vibration absorber; then with MATLAB optimized to get structural material parameters of vibration absorber; finally conduct harmonic response analysis to built two-dimensional model of built-in chatter suppression boring bar by ANSYS, compare and optimize the results to guide the development of built-in chatter suppression boring bar.
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2

Tarng, Y. S., et T. C. Li. « Detection and Suppression of Drilling Chatter ». Journal of Dynamic Systems, Measurement, and Control 116, no 4 (1 décembre 1994) : 729–34. http://dx.doi.org/10.1115/1.2899272.

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The paper presents a simple but effective method to detect and suppress chatter in drilling operations. Unlike conventional approaches, complex cutting dynamics in drilling operations do not need to model and analyze in this new approach. Chatter is detected when a large thrust force or torque variation is observed. Then, a simple spindle speed change method using the chatter frequency to guide the modification of spindle speed for suppression of chatter is applied. It is shown, by experimental results, that chatter in drilling can be effectively suppressed by using this method.
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3

Liu, Bo, Changfu Liu, Xinli Yu, Yang Zhou et Daohai Wang. « Prediction, detection, and suppression of regenerative chatter in milling ». Advances in Mechanical Engineering 14, no 10 (octobre 2022) : 168781322211297. http://dx.doi.org/10.1177/16878132221129746.

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In metal cutting processing, especially in the processing of low-rigidity workpieces, chatter is a key factor affecting many aspects such as surface quality, processing efficiency and tool life. The academic research on chatter mainly focuses on three directions: chatter prediction, real-time detecting, and chatter suppression. With the continuous development of machining toward intelligence, the hot spots and trends of chatter research are also constantly changing. Therefore, an in-depth and systematic summary of the current situation of chatter research is urgently needed. On this basis, it is of great significance to realize the prediction of the hot spots and trends of chatter research. This article summarizes the research status from three aspects of chatter prediction, detecting and suppression, and points out the advantages and limitations of current chatter research. After in-depth discussion, this article also looks forward to the trend of chatter research. The hot spots of chatter research will focus on the following points: (1) Chatter research methods and means based on data-driven. (2) Integrated data collection, processing and decision-making methods. (3) Chatter detecting unit and chatter suppression unit are integrated in the smart spindle. (4) The chatter mechanism and detecting research of robot milling.
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4

Kong, Tian Rong, Zhe He Yao et Zi Chen Chen. « Research on the Boring Chatter Suppression Based on MR Fluid ». Materials Science Forum 532-533 (décembre 2006) : 365–68. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.365.

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Chatter during boring process is one of the main adverse factors influenced on the machining accuracy of precision hole, surface quality and working efficiency. In order to suppress chatter, an innovative controlling means of MR-intelligent-boring-bar with self-chatter-suppression is proposed, which is composed of MR fluid, shell structure, excitation coil and boring bar. The MR fluid’s mechanical characteristic can be adjusted by changing the intensity of magnetic field, thus the system stiffness and damping will be modified, and then the boring chatter can be suppressed. Otherwise, the dynamic model of MR-intelligent-boring-bar with self-chatter-suppression is built. Lastly, the experimental system of MR-intelligent-boring-bar is established, and the experiments of chatter suppression during boring process are performed. The results of experiments show that the new means of chatter suppression is effective.
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5

Ema, S., et E. Marui. « Suppression of Chatter Vibration in Drilling ». Journal of Manufacturing Science and Engineering 120, no 1 (1 février 1998) : 200–202. http://dx.doi.org/10.1115/1.2830103.

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In this study, from the viewpoint of suppressing chatter vibration in drilling, the effects of cutting conditions on the initiation boundary of chatter vibration were investigated experimentally. Furthermore, the application of an impact damper on drills was attempted to suppress chatter vibrations.
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6

Yamato, Shuntaro, Toshiki Okuma, Kenichi Nakanishi, Junji Tachibana, Norikazu Suzuki et Yasuhiro Kakinuma. « Chatter Suppression in Parallel Turning Assisted with Tool Swing Motion Provided by Feed System ». International Journal of Automation Technology 13, no 1 (5 janvier 2019) : 80–91. http://dx.doi.org/10.20965/ijat.2019.p0080.

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Parallel turning technology has been attracting attention as an important technology to enhance the productivity of multitasking machine tools. To maximize the productivity advantage of parallel turning, chatter avoidance or suppression is one of the most noteworthy concerns. In this study, a novel chatter suppression technique using tool swing motion is provided by a feed drive system. The optimal design methodology of the tool swing motion for effective chatter suppression is also introduced based on its analogy with the spindle speed variation technique under the shared-surface parallel turning and rigid-tool and flexible-workpiece assumptions. The proposed method was evaluated with regard to the chatter stabilizing performance and workpiece runout as compared to conventional equal pitch turning and unequal pitch turning for chatter suppression. As a result, the proposed tool swing parallel turning exhibited a high chatter stabilizing performance without eccentricity of the workpiece and enhanced surface quality, although particular swing marks were left on the machined surface.
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7

Inasaki, I., B. Karpuschewski et H. S. Lee. « Grinding Chatter – Origin and Suppression ». CIRP Annals 50, no 2 (2001) : 515–34. http://dx.doi.org/10.1016/s0007-8506(07)62992-8.

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8

Nakagawa, Heisaburo, Keiji Ogawa, Satoshi Demachi et Hideyasu Hasegawa. « An Experimental Study on Suppression of Chatter Vibration with Different Helix Angles End-Mill ». Key Engineering Materials 407-408 (février 2009) : 37–40. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.37.

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In this study we attempted to suppress chatter vibration in end-milling of austenitic stainless steels with an end-mill having different helix angles. We showed there were two types of chatter vibration in end-milling with a conventional end-mill with regular helix angle. The two types of chatter vibration depend on the cutting speed. We detected these two types of chatter vibration by the developed monitoring method using laser Doppler vibrometers. We classified the two types of chatter vibration according to chatter generating tendency, frequency and vibration mode. We showed that chatter vibration generated at lower cutting speeds was regenerative chatter vibration. On the other hand, chatter vibration generated at higher cutting speeds was another type. We showed that a end-mill with different helix angles could prevent generative chatter vibration at lower cutting speeds and was also effective in suppressing chatter vibration at higher cutting speeds.
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9

Yang, F., B. Zhang et J. Yu. « Chatter Suppression via an Oscillating Cutter ». Journal of Manufacturing Science and Engineering 121, no 1 (1 février 1999) : 54–60. http://dx.doi.org/10.1115/1.2830575.

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Chatter is one of the critical issues in a machining process since it deteriorates the surface quality of a workpiece and reduces machining efficiency. A new method is developed to suppress chatter in which an oscillating cutter is used to machine the workpiece through a stepping motor and a transmission mechanism so as to vary tool rake angle continuously and periodically in process. Theoretical analyses are performed on the stability of the cutting system, and verified by the experimental studies. Both theoretical analyses and experimental results indicate that the method can suppress chatter in a turning process effectively. With the application of an oscillating cutter, the amplitude can be reduced by 80 percent in cutting a steel workpiece.
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10

Yang, Yi Qing, et T. T. Chen. « Numerical Solution of Tuned Mass Dampers for Optimum Milling Chatter Suppression ». Materials Science Forum 697-698 (septembre 2011) : 223–28. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.223.

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The most common tunings for the TMD in the field of vibration suppression are H∞ and H2. However, regenerative machine tool chatter is a complex problem with many variations, which therefore requires a new tuning for the optimum chatter suppression. The real part based tuning is investigated numerically by employing the minimax numerical approach, which aims to maximize the minimum real part of the primary structure under the harmonic excitation. The performances of multiple TMDs system are discussed. A face milling case is employed to verify the benefits of multiple TMDs in increasing the chatter free depth of cut. It is concluded that multiple TMDs configuration are more effective than single TMD in chatter control.
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11

Yeh, L.-J., et G.-J. Lai. « A Study of the Monitoring and Suppression System for Turning Slender Workpieces ». Proceedings of the Institution of Mechanical Engineers, Part B : Journal of Engineering Manufacture 209, no 3 (juin 1995) : 227–36. http://dx.doi.org/10.1243/pime_proc_1995_209_077_02.

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The main purpose of this study is to develop a chatter monitoring and suppression system while turning slender workpieces. In order to clarify the chatter behaviour, the ratio of the length to diameter of the cylindrical bar (L/D ratio) is considered as an independent parameter. Experimental investigations were carried out over a wide range of the L/D ratio and cutting conditions to identify the cutting stability. It can be observed that the standard deviation value of the main cutting force obviously increases in the chatter developing period, and this phenomenon can be used to define the chatter threshold. From the observation on the variation of the standard deviation value of the cutting process and then by means of a reasonable application of the standard deviation value, a precise on-line chatter threshold based on the double-standard concept has been defined in this paper. For an accurate judgement of the chatter occurrence, an effective monitoring criterion was proposed and developed. This monitoring criterion was applied to the feed rate control system to suppress the chatter vibration by increasing the feed rate. Experimental results show, furthermore, that the control system is effective when the L/D ratio is smaller than 12.
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12

WANG, Yuehui. « Advances on Machining Chatter Suppression Research ». Journal of Mechanical Engineering 46, no 07 (2010) : 166. http://dx.doi.org/10.3901/jme.2010.07.166.

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13

Saffury, J. « Chatter Suppression of External Grooving Tools ». Procedia CIRP 58 (2017) : 216–21. http://dx.doi.org/10.1016/j.procir.2017.03.215.

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14

Soliman, E., et F. Ismail. « Chatter suppression by adaptive speed modulation ». International Journal of Machine Tools and Manufacture 37, no 3 (mars 1997) : 355–69. http://dx.doi.org/10.1016/0890-6955(95)00084-4.

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15

Tanaka, Hisataka, Fumio Obata, Tomio Matsubara, Hiroshi Mizumoto et Takao Kinouchi. « Active Chatter Suppression in Boring Operations. » Transactions of the Japan Society of Mechanical Engineers Series C 59, no 560 (1993) : 1243–48. http://dx.doi.org/10.1299/kikaic.59.1243.

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16

Munoa, J., X. Beudaert, Z. Dombovari, Y. Altintas, E. Budak, C. Brecher et G. Stepan. « Chatter suppression techniques in metal cutting ». CIRP Annals 65, no 2 (2016) : 785–808. http://dx.doi.org/10.1016/j.cirp.2016.06.004.

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17

Wu, Bao Hai, Ming Luo, Ding Hua Zhang et X. Zhou. « Deformation Control and Chatter Suppression in 5-Axis Milling of Thin-Walled Blade ». Advanced Materials Research 188 (mars 2011) : 314–18. http://dx.doi.org/10.4028/www.scientific.net/amr.188.314.

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This paper deals with deformation control and chatter suppression in the milling of thin-walled blade. The purpose is to generate tool paths that can control machining deformation and suppress chatter during milling. To achieve this object, symmetrical spiral milling approach is proposed to release residual stress on both sides of the blade in the same machining circle to control machining deformation. Besides, in order to suppress chatter during milling of thin-walled blade, nonuniform-allowance is left on both sides of the blade during machining, this can effectively increase the rigidity, thereby chatter cannot easily occur during machining. Machining experiments showed that the proposed approaches can dramatically improve the machining quality, decrease deformation and suppress chatter in the milling of thin-walled blade.
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18

Han, Zhenyu, Hongyu Jin, Maoyue Li et Hongya Fu. « An Open Modular Architecture Controller Based Online Chatter Suppression System for CNC Milling ». Mathematical Problems in Engineering 2015 (2015) : 1–13. http://dx.doi.org/10.1155/2015/985837.

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In milling processes, chatter is a kind of sudden relative vibration appearing between the cutter and the workpiece, which results in poor part quality, accelerated tool wear, and shortened spindle life. In this paper, an open modular architecture controller (OMAC) of machine tool which integrates the algorithms including chatter recognition, compensation command generation, and execution is proposed with the aim of providing an integrated solution for milling chatter suppression in CNC kernel. To effectively identify chatter, experiments are designed to determine the optimal installation place of accelerometer and then triaxial cutting forces and acceleration signals are compared to see which are more sensitive to chatter onset. In terms of data processing, 16 sampling points in time domain are chosen to perform online fast Fourier transform (FFT) in consideration of signal effectiveness and computational efficiency. To implement real-time chatter suppression in CNC kernel, a simplified dynamic model of milling system is used to obtain the relationship between chatter frequency and spindle speed. Finally, an adaptive control module which completes force signal extraction and processing by FFT and has the ability to modify related cutting parameters is designed to interact with other modules in OMAC where data acquisition thread and interpolation thread are synchronized. The proposed system is experimentally validated.
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19

Alzghoul, Mohammad, Ferenc Sarka et Ferenc J. Szabó. « Analytical and Experimental Techniques for Chatter Prediction, Suppression and Avoidance in Turning : Literature Survey ». Design of Machines and Structures 12, no 2 (2022) : 33–43. http://dx.doi.org/10.32972/dms.2022.011.

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Chatter is a self-excited vibration that takes place during turning operations. It is either to be avoided or reduced for its negative impact on the machine-tool, the workpiece surface finish, and the cutting tool life. A lot of research has been carried out in this domain to understand this phenomenon, which leads to finding ways to detect, identify, avoid, reduce, and control chatter in turning processes. In this paper, chatter research related to turning processes is reviewed and summarized. The main goal of this review paper is to compare different chatter prediction, suppression, and avoidance techniques to find out the most effective technique, so a scope of a work related to turning processes chatter is defined.
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20

Mohammad, Ummu Atiqah Khairiyah B., A. K. M. N. Amin, Muhd Amir Hafiz Bin Ahamad Mahrodi et Muammer D. Arif. « Chatter Suppression with Magnetic Damping in Turning of Stainless Steel AISI 304 ». Applied Mechanics and Materials 393 (septembre 2013) : 183–88. http://dx.doi.org/10.4028/www.scientific.net/amm.393.183.

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Chatter is almost an unavoidable phenomenon during machining, normally accompanied by a characteristic sharp and monotonous noise. Apart from noise pollution in the industry, chatter leaves a bad surface finish on the part and negatively influences dimensional tolerances, reduced productivity, excessive tool wear and damaged machine-tool components. Therefore, chatter avoidance is utmost importance. However, a deeper investigation into chatter formation reveals that chatter appears during metal cutting process as a result of resonance caused by interaction of the prominent natural frequencies of the system with the frequency of chip serration. This paper presents an innovative approach to chatter suppression during turning of stainless steel AISI 304 applying permanent magnet from the bottom of the tool holder to increase the damping coefficient of the tool holder, since it has been identified that the tool holder is the main vibrating component during turning. A special fixture was designed, fabricated and mounted on the carriage of a conventional turning machine Harrison M390 for holding a permanent magnet bar. The variable cutting parameters were - cutting speed, feed rate and depth of cut at constant tool overhang of 120 mm. The experiments were designed based small Central Composite Design (small CCD) based on the Response Surface Methodology (RSM) approach using DESIGN EXPERT (DOE) software. The experiments were performed under two different conditions, the first under normal conditions, while the other was under the application of magnetic field from permanent magnet located side direction of the tool holder. The experiments focused on monitoring the vibration signals using a vibration data acquisition system during turning operation. Analysis of the recorded signals in the FFT domain indicated significant reduction of chatter when a magnetic field is applied. It is apparent that a reduction of chatter amplitude will result in improved surface finish, tool life, machining accuracy, productivity, as well as reduction of operation.
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21

Kim, K. J., et J. Y. Ha. « Suppression of Machine Tool Chatter Using a Viscoelastic Dynamic Damper ». Journal of Engineering for Industry 109, no 1 (1 février 1987) : 58–65. http://dx.doi.org/10.1115/1.3187095.

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Optimization procedures to install a viscoelastic dynamic damper into a single degree of freedom primary system is briefly reviewed. Excitation methods are shown to identify elastic modulus and loss factor of a viscoelastic material at given prestrain, which are needed in the optimum design of the damper. An optimum-designed damper is attached on the toolpost of a lathe and its excellent chatter-suppressing effects are observed under six cutting conditions in terms of integrated power of the accelerations around the chatter frequency. Because one of the resonance frequencies responsible for the chatter varies depending upon the location of the carriage on the sliding surface, the prestrain of the viscoelastic element, which is initially optimum-tuned and damped at a location of the carriage, is readjusted for optimum tuning at the other locations. The effects of the readjustment are discussed in terms of the reduction of structural compliances and magnitudes of chatter vibrations.
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22

Li, Xin, Zhe He Yao et Zi Chen Chen. « An Effective EMD-Based Feature Extraction Method for Boring Chatter Recognition ». Applied Mechanics and Materials 34-35 (octobre 2010) : 1058–63. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1058.

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Chatter often occurs during precision hole boring, it results in low quality of finished surface and even damages the cutting tool. In order to identify chatter rapidly and gain the precious time for chatter suppression, a chatter monitoring system was established and an effective feature extraction method for boring chatter recognition was presented. According to the characteristic of chatter signal, empirical mode decomposition (EMD) was introduced into chatter feature extraction, and its basic theories were investigated. The vibration signal was decomposed by EMD, then the intrinsic mode functions (IMF) was got. Finally, the feature of chatter symptom was extracted by analyzing the energy spectrum of each IMF. The results show that feature extracted from vibration of boring bar by EMD can indicate chatter outbreak symptom, and it can be used as feature vectors for rapidly recognizing chatter.
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23

Xie, Chang Gui, et Hai Zeng. « Mechanism of the Strip Surface Chatter Marks with 1220 Cold Rolling Mill ». Applied Mechanics and Materials 575 (juin 2014) : 376–81. http://dx.doi.org/10.4028/www.scientific.net/amm.575.376.

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Aiming at a 1220 strip surface, where the Cold Rolling Mill had chatter marks, on which the reasons for the formation was tracked tested for in-depth study. Based on the vibration test, the analysis was given to the dynamic characteristics of the rack [1-3]. It was found that had reaction to the mill that caused the forced vibration mill to further accelerate the formation of chatter marks. In the analysis of the mechanism on the chatter marks, the relationship between chatter marks spacing and vibration source was considered in successfully finding out the cause of the 1220 mill chatter marks generated, and then the chatter marks suppression measures were proposed with satisfied effects.
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24

Sallese, Lorenzo, Niccolò Grossi, Antonio Scippa et Gianni Campatelli. « Numerical investigation of chatter suppression in milling using active fixtures in open-loop control ». Journal of Vibration and Control 24, no 9 (14 septembre 2016) : 1757–73. http://dx.doi.org/10.1177/1077546316668686.

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Among the chatter suppression techniques in milling, active fixtures seem to be the most industrially oriented, mainly because these devices could be directly retrofittable to a variety of machine tools. The actual performances strongly depend on fixture design and the control logic employed. The usual approach in the literature, derived from general active vibration control applications, is based on the employment of adaptive closed-loop controls aimed at mitigating the amplitude of chatter frequencies with targeted counteracting vibrations. Whilst this approach has proven its effectiveness, a general application would demand a wide actuation bandwidth that is practically impeded by inertial forces and actuator-related issues. This paper presents the study of the performance of alternative open-loop actuation strategies in suppressing chatter phenomena, aiming at limiting the required actuation bandwidth. A dedicated time-domain simulation model, integrating fixture dynamics and the features of piezoelectric actuators, is developed and experimentally validated in order to be used as a testing environment to assess the effectiveness of the proposed actuation strategies. An extensive numerical investigation is then carried out to highlight the most influential factors in assessing the capability of suppressing chatter vibrations. The results clearly demonstrated that the regenerative effect could be effectively disrupted by actuation frequencies close to half the tooth-pass frequency, as long as adequate displacement is provided by the actuators. This could sensibly increase the critical axial depth of cut and hence improve the achievable material removal rate, as discussed in the paper.
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Mao, Kuan Min, Ming Zhu et Min Zhang. « A New Vari-Speed Cutting Scheme for Chatter Suppression ». Materials Science Forum 697-698 (septembre 2011) : 53–56. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.53.

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From the view of implementation and machine protection, this paper presents a novel scheme of programming spindle-speed variation for regenerative chatter suppression. It is based on the research of the necessary conditions of chatter, from a new perspective. Through standard test method, research are carried on the influence of the interval time and the speed variation amplitude on vibration suppression effectiveness. In this work, cutting process keeps relatively more stable without motor continuous overload, which is verified by theoretical analysis and experiments.
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26

Петраков, Юрій Володимирович. « SIMULATION OF CHATTER SUPPRESSION FOR LATHE MACHINING ». Journal of Mechanical Engineering the National Technical University of Ukraine "Kyiv Polytechnic Institute" 2, no 77 (17 novembre 2016) : 119–24. http://dx.doi.org/10.20535/2305-9001.2016.77.78960.

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27

Segalman, Daniel J., et Eric A. Butcher. « Suppression of Regenerative Chatter via Impedance Modulation ». Journal of Vibration and Control 6, no 2 (février 2000) : 243–56. http://dx.doi.org/10.1177/107754630000600205.

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28

Liu, C. R., et T. M. Liu. « Automated Chatter Suppression by Tool Geometry Control ». Journal of Engineering for Industry 107, no 2 (1 mai 1985) : 95–98. http://dx.doi.org/10.1115/1.3185989.

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A new concept of controlling tool geometry for in-process chatter suppression is quantitatively evaluated. Experimentally derived relationships between machining stability and tool geometry, namely, rake angle, clearance angle, and side cutting angle are developed. The results indicate an order of magnitude increase in the production rate if the control method is properly used.
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GOTO, Akihiro, Jumpei KITAYAMA, Hirohisa NARITA et Takasi KUBO. « Suppression of Chatter Vibrations by Random Algorithm ». Proceedings of Conference of Tokai Branch 2019.68 (2019) : 310. http://dx.doi.org/10.1299/jsmetokai.2019.68.310.

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30

Xiao, M., S. Karube, T. Soutome et K. Sato. « Analysis of chatter suppression in vibration cutting ». International Journal of Machine Tools and Manufacture 42, no 15 (décembre 2002) : 1677–85. http://dx.doi.org/10.1016/s0890-6955(02)00077-9.

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31

Brecher, C., D. Manoharan, U. Ladra et H. G. Köpken. « Chatter suppression with an active workpiece holder ». Production Engineering 4, no 2-3 (29 janvier 2010) : 239–45. http://dx.doi.org/10.1007/s11740-009-0204-y.

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32

Wang, Chenxi, Xingwu Zhang, Jinxin Liu, Hongrui Cao et Xuefeng Chen. « Adaptive vibration reshaping based milling chatter suppression ». International Journal of Machine Tools and Manufacture 141 (juin 2019) : 30–35. http://dx.doi.org/10.1016/j.ijmachtools.2019.04.001.

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33

Yusoff, Ahmad Razlan, Mohd Firdaus Hassan et Muhammad Hatifi Mansor. « Multiobjective Optimization of Milling Tool Geometry for Chatter Suppression and Productivity Improvement ». Advanced Materials Research 445 (janvier 2012) : 21–26. http://dx.doi.org/10.4028/www.scientific.net/amr.445.21.

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In this paper, productivity and self-excited vibration are simultaneously optimized using multiobjective optimization in cutting process. At high material removal rate, machining processes accelerates tool wear, poor surface finish and failure of machine parts. The effect of self-excited vibration or chatter prevents high machining productivity. This chatter vibration can be avoided by modifying tool geometry at low material removal rate but not at high productivity. To compensate material removal rate and chatter, multiobjective optimization is applied using ε-constraint algorithm to achieve a Pareto front solution. Differential Evolution as intelligent optimization algorithm is shown better results than traditional technique of Sequential Quadratic Programming.
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34

Yu, Ai Bing, Liang Dong et Yan Lin Wang. « Effect of Wheel Elasticity on Grinding Stability ». Applied Mechanics and Materials 37-38 (novembre 2010) : 394–97. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.394.

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Grinding stability was analyzed concerned with contact deformation and contact stiffness of wheels. Elastic deformations of the grinding wheel were measured with inductance sensors. Dynamic grinding system model was set up. Relation between contact stiffness and chatter growing index was analyzed. Chatter suppression experiments with variable grinding speeds were carried out. When wheel is in contact with a workpiece, contact deformation can occur. The contact stiffness of grinding wheel is a variable. The relation between chatter growing index and contact stiffness is an increasing function. Chatter growing index can be decreased by lowering contact stiffness of wheel. The grinding system stability will be improved with variable grinding speed.
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35

Mao, Kuan Min, Min Zhang, Ming Zhu et Ling Yin. « Simulation for Sinusoidal Spindle Speed Variation Cutting in Time Domain Based on Simulink ». Advanced Materials Research 188 (mars 2011) : 549–54. http://dx.doi.org/10.4028/www.scientific.net/amr.188.549.

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This paper presents a simulink block diagram which is constructed on the basis of a classical nonlinear mechanical model of machine tool chatter vibration. With varying amplitude ratio and frequency ,sinusoidal spindle speed variation (S3V) cutting process is investigated in time domain, which tests and verifies the feasibility of chatter suppression by S3V method.
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Scalzo, Federico, Giovanni Totis, Emanuele Vaglio et Marco Sortino. « Passive Chatter Suppression of Thin-Walled Parts by Means of High-Damping Lattice Structures Obtained from Selective Laser Melting ». Journal of Manufacturing and Materials Processing 4, no 4 (10 décembre 2020) : 117. http://dx.doi.org/10.3390/jmmp4040117.

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Chatter vibrations arising during machining operations are detrimental for cutting process performance, since they may cause poor surface quality of the machined part and severe damages to machine tool elements. Passive approaches for chatter suppression are based on the integration of special mechanical components with high-damping properties within the machining system. They represent a good solution to this problem thanks to their intrinsic simplicity. Recently, the application of metallic lattice structures inside 3D printed parts obtained from the Selective Laser Melting technology have proven superior damping properties with respect to the same full density material. Here, this idea is further explored by considering the novel configuration where the unmelted powder grains are retained inside the lattice structure by an external shell, acting as a multiplicity of microscopic mechanical dampers. This concept is applied for passive chatter suppression of thin-walled parts that are of particular relevance for industry. Preliminary experimental investigation was first carried out on simple beam-like specimens, and then on thin-walled benchmarks that were identified through modal analysis and tested under real cutting conditions. The main conclusion is that the novel proposed configuration (lattice plus unmelted powder) has higher damping properties with respect to the full density and lattice alternatives. Accordingly, it may be successfully applied for passive chatter suppression in real machining operations.
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Yilmaz, Alpay, Emad AL-Regib et Jun Ni. « Machine Tool Chatter Suppression by Multi-Level Random Spindle Speed Variation ». Journal of Manufacturing Science and Engineering 124, no 2 (29 avril 2002) : 208–16. http://dx.doi.org/10.1115/1.1378794.

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This paper presents a new method for varying the spindle speed to suppress chatter in machining. The spindle speed is varied in a pseudo-random fashion within the bandwidth of the spindle system. Both implementation issues and spindle system responses to such signals are investigated. A new method to analyze the stability of machining systems with varying spindle speed is also introduced. The effectiveness and advantages of the random spindle speed variation in chatter suppression is verified using numerical simulations and experiments.
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38

Meehan, Paul A. « Vibration Instability in Rolling Mills : Modeling and Experimental Results ». Journal of Vibration and Acoustics 124, no 2 (26 mars 2002) : 221–28. http://dx.doi.org/10.1115/1.1456457.

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Models for the occurrence of the vibrational instability during rolling known as third octave chatter are presented and discussed. An analysis of rolling mill chatter was performed for the purpose of identifying characteristics of the vibrations and to determine any dependency on the rolling schedule. In particular, a stability criterion for the critical rolling speed is used to predict the maximum rolling speed without chatter instability on schedules from a 5 stand tandem mill rolling thin steel product. The results correlate well with measurements of critical speed occurring on the mill using a vibration monitor. This research provides significant insights into the chatter phenomena and has been used to investigate control methods for suppression of the instability.
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39

Yuhuan, Zhang, Ren Yongsheng, Tian jishuang et Ma jingmin. « Chatter stability of the constrained layer damping composite boring bar in cutting process ». Journal of Vibration and Control 25, no 16 (4 juin 2019) : 2204–14. http://dx.doi.org/10.1177/1077546319852240.

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Traditional boring bars are generally made up of isotropic metallic materials and exhibit extremely poor chatter suppression ability. For enhancing the chatter stability, using anisotropic composite materials in the preparation of boring bars proves to be an effective method so as to enhance the boring bar’s natural frequency and damping. Additionally, the addition of constrained layer damping (CLD) technology on the composite boring bar can further improve the damping performance. This study aims to develop a theoretical analysis model for the prediction of the chatter stability of the CLD composite boring bar and explore the effectiveness and practicability of the CLD technology in suppressing the chatter of composite boring bar. Based on Euler–Bernoulli beam theory and the complex stiffness method of CLD, the structural dynamic model of the CLD composite boring bar was derived, and some structural parameters of the bar mainly including the ply angle of the composite material, the thicknesses of both damping layer, and constrained layer were also optimized. By combining the linear model of cutting force with a regenerative delay effect and the established dynamic model, the chatter analysis model of the CLD composite boring bar was constructed and the lobe diagram of the chatter stability of the cutting system was plotted by means of frequency domain method. The effects of the ply angle of the composite boring bar, the thicknesses of damping layer, and constrained layer on the chatter stability were examined. By performing time integral of the delay equation of motion, the time-domain response curves of the cutting system are obtained. The chatter stability prediction results based on the lobe diagram fit well with the prediction results on the basis of dynamic stiffness calculation and time-domain numerical integral results.
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40

Biju, CV, et MS Shunmugam. « Development of a boring bar with magneto rheological fluid damping and assessment of its dynamic characteristics ». Journal of Vibration and Control 24, no 14 (23 mars 2017) : 3094–106. http://dx.doi.org/10.1177/1077546317700715.

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The boring operation is prone to chatter as the boring bar is slender and has an overhang. For chatter suppression, passive, semi-active or active control methods can be employed. In the present work, a boring bar has been specially designed to transfer vibration to a cantilever bar surrounded by magneto rheological (MR) fluid. The MR fluid when exposed to electromagnetic flux changes its rheological property within a certain range. Thus, the boring bar is able to exhibit variable damping characteristics by changing the excitation current. The modal parameters are experimentally obtained through an impact test and a shaker test. The variation of modal parameters with excitation current is discussed. A stability lobe diagram is also developed from the model parameters, showing safe and unsafe regions for operation. The semi-active boring bar developed in the present work can be used for the suppression of chatter during the boring operation.
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41

Miądlicki, Karol, Marcin Jasiewicz, Marcin Gołaszewski, Marcin Królikowski et Bartosz Powałka. « Remanufacturing System with Chatter Suppression for CNC Turning ». Sensors 20, no 18 (7 septembre 2020) : 5070. http://dx.doi.org/10.3390/s20185070.

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The paper presents the concept of a support system for the manufacture of machine spare parts. The operation of the system is based on a reverse engineering module enabling feature recognition based on a 3D parts scan. Then, a CAD geometrical model is generated, on the basis of which a machining strategy using the CAM system is developed. In parallel, based on the geometric model, a finite element model is built, which facilitates defining technological parameters, allowing one to minimize the risk of vibrations during machining. These parameters constitute input information to the CAM module. The operation of the described system is presented on the example of machining parts of the shaft class. The result is a replacement part, the accuracy of which was compared by means of the iterative closest point algorithm obtaining the RMSE at the level of scanner accuracy.
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42

Wang, Mao Fa, et Ren Yuan Fei. « Controllable Compliance Device for Internal Grinding Chatter Suppression ». Key Engineering Materials 259-260 (mars 2004) : 710–14. http://dx.doi.org/10.4028/www.scientific.net/kem.259-260.710.

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43

YEN, Kelson Z. Y., et Wen C. HSUEH. « Suppression of Chatter Vibration in Inner-Diameter Cutting ». JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing 39, no 1 (1996) : 25–33. http://dx.doi.org/10.1299/jsmec1993.39.25.

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44

Yao, Zhehe, Deqing Mei et Zichen Chen. « Chatter suppression by parametric excitation : Model and experiments ». Journal of Sound and Vibration 330, no 13 (juin 2011) : 2995–3005. http://dx.doi.org/10.1016/j.jsv.2011.01.031.

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Mei, C. « Active regenerative chatter suppression during boring manufacturing process ». Robotics and Computer-Integrated Manufacturing 21, no 2 (avril 2005) : 153–58. http://dx.doi.org/10.1016/j.rcim.2004.07.011.

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Alammari, Y., M. Sanati, T. Freiheit et S. S. Park. « Investigation of Boring Bar Dynamics for Chatter Suppression ». Procedia Manufacturing 1 (2015) : 768–78. http://dx.doi.org/10.1016/j.promfg.2015.09.059.

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47

Mei, Deqing, Tianrong Kong, Albert J. Shih et Zichen Chen. « Magnetorheological fluid-controlled boring bar for chatter suppression ». Journal of Materials Processing Technology 209, no 4 (février 2009) : 1861–70. http://dx.doi.org/10.1016/j.jmatprotec.2008.04.037.

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48

Ren, Jun Xue, Ding Hua Zhang, Yao Yao Shi et Zeng Qiang Wang. « Research on the Chatter Suppression During Machining Thin-Walled Complex Blades ». Materials Science Forum 532-533 (décembre 2006) : 616–19. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.616.

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This paper presents a new method for chatter suppression during finishing thin-walled blades. Traditionally auxiliary support is used to increase the stiffness of the structure, however, the shrink or dilate effect of the packing material, such as wax and rosin, is difficult to control, so the machining precision could not be assured. Based on the principle of stiffness optimization principle, the rigidity of the cantilever blade tip and leading/trailing edge region are improved with the non-uniform allowances distribution. The milling experiments have showed that the proposed strategy could be successfully used to realize the suppression of chatter vibration during flexible parts machining.
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49

Merino, Ruben, Iñigo Bediaga, Alexander Iglesias et Jokin Munoa. « Hybrid Edge–Cloud-Based Smart System for Chatter Suppression in Train Wheel Repair ». Applied Sciences 9, no 20 (12 octobre 2019) : 4283. http://dx.doi.org/10.3390/app9204283.

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The contact profile of a train wheel has a key role in its operation performance. Rolling smoothly and with reduced resistance results in an increase in the efficiency and safety of rail transport. The original shape and dimensions of the profile of the wheel are altered under operation of the train, especially due to braking events and the presence of external objects between the wheel and the railway. With the purpose of recovering the optimum contact profile, train wheels are periodically machined using special lathes. This repair operation is particularly critical in freight trains, which are only reshaped a few times throughout their service life and, therefore, high depths of cut are required to recover the wheel in a productive way. As the presence of chatter vibrations limits the productivity of these operations, a hybrid edge–cloud computing approach has been developed for chatter vibration suppression. An expert system based on automatic chatter detection and suppression has been developed in the edge. The expert system is based on continuous real-time vibration monitoring and combines continuous spindle speed variation (CSSV) and cutting speed reduction to suppress chatter. Cloud computing is used to extract wheel profile machining fingerprints and obtain insights from multiple aggregated machined wheels. An industrial implementation of the system is described in the present work.
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Yang, Kai, Guofeng Wang et Junyu Cong. « Milling chatter monitoring based on sparse representation and image similarity measurement ». Insight - Non-Destructive Testing and Condition Monitoring 64, no 3 (1 mars 2022) : 146–54. http://dx.doi.org/10.1784/insi.2022.64.3.146.

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It is well known that chatter is one of the main bottlenecks affecting the surface quality of workpieces and production efficiency during machining. In this paper, a new chatter monitoring methodology is proposed on the basis of sparse representation and image similarity measurement to recognise chatter in the manufacturing process. Due to its non-stationary nature with regard to chatter signals, variational mode decomposition (VMD) is utilised and timefrequency entropy (TFE) based on VMD is introduced to measure the complexity. Then, the overcomplete dictionary is pre-trained using the characteristic matrix image extracted from the multi-domain features, thus facilitating the description of chatter from various perspectives. Subsequently, the visualised sparse coefficient matrix is acquired from the trained dictionary and regarded as the reference image, in which detailed information can be obtained from the visualisation of the image. Next, an image similarity measurement method is applied to assess the similarity between the tested sparse coefficient image and the reference image, thereby considering the local and global quality maps such that a comprehensive index for chatter detection can be obtained to fuse the various features. Finally, to validate the proposed methodology, experimental chatter tests are conducted under different machining conditions. The results demonstrate that the chatter can be discriminated at the early stage of chatter development, thus leaving more time to take suppression measures.
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