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Journal ArticleDOI

A new magnetorheological damper for chatter stability of boring tools

TL;DR: In this paper, a magnetorheological (MR) damper is introduced to increase the stability of the boring process, which significantly increases the chatter free depth of cut on the stability lobe diagrams.
About: This article is published in Journal of Materials Processing Technology.The article was published on 2021-03-01. It has received 18 citations till now. The article focuses on the topics: Magnetorheological damper & Magnetorheological fluid.
Citations
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Journal ArticleDOI
TL;DR: In this article, the current applications used magnetorheological fluid (MRF) are summarized from 2016 to 2020, which include machining auxiliary equipment and surface polishing equipment, and some detailed structures of equipment are investigated and relative limitations are analyzed based on the characteristics of MRF.
Abstract: Owing to some specific advantages, magnetorheological fluid (MRF) has drawn significant attention in a broad range of modern precision machining field. With the diversification and improvement of demands, many novel structure configurations and processing methods have been applied to mechanical machining equipment. Although different applications with MRF have been proposed in existing literature, the classification, latest approaches and further trend are not involved clearly for machining field. Thus, the current applications used MRF are summarized from 2016 to 2020, which include machining auxiliary equipment and surface polishing equipment in this work. Especially, some detailed structures of equipment are investigated and relative limitations are analyzed based on the characteristics of MRF. Finally, in view of the current equipment, advantages and defects are briefly reported; the developing trends of modern precision machining with MRF are discussed. Therefore, in the state-of-the-art review, increasingly important role of MRF are emphasized for the machining field, which are conducive to innovative developments and market selection.

10 citations

Journal ArticleDOI
TL;DR: In this paper , the authors proposed a forced vibration mechanism for thin-walled workpiece under the influence of various factors and a corresponding suppression method, and the results show that the proposed theory can explain the forced vibration phenomenon of the thin-wall workpiece, and that the vibration suppression effect of the STF is consistent with the theory.

6 citations

Journal ArticleDOI
TL;DR: Simulations of the controller show its fast response and robustness against disturbances and parametric uncertainties and validation cutting tests showed that the stability limit can be increased significantly with the sliding mode control of the magnetorheological fluid damper.

4 citations

Peer ReviewDOI
06 Mar 2023-Machines
TL;DR: In this paper , the authors systematically review previous studies on the identification of system dynamic characteristics, modeling and prediction of chatter stability, and chatter elimination/suppression methods and devices and conclude that existing problems are summarized, and future research is concluded.
Abstract: Thin−walled parts are widely used in many important fields because of performance and structural lightweight requirements. They are critical parts because they usually carry the core functions of high−end equipment. However, their high−performance machining has been facing severe challenges, among which the dynamics problem is one of the most important obstacles. The machining system is easily subjected to chatter due to the weak rigidity of the thin−walled structure and slender cutting tool, which significantly deteriorates the surface quality and reduces the machining efficiency. Extensive studies aiming at eliminating machining chatter have been carried out in the recent decades. This paper systematically reviews previous studies on the identification of system dynamic characteristics, modeling and prediction of chatter stability, and chatter elimination/suppression methods and devices. Finally, existing problems are summarized, and future research is concluded.

3 citations

Book ChapterDOI
08 Jun 2021
TL;DR: In this paper, the authors studied the features of joint flexural and torsional vibrations, the relationship between amplitudes and frequencies, and vibration modes' effect on the loss of vibration resistance.
Abstract: In the process of fine boring of small-diameter holes (d = 10–20 mm), coupled flexural-and-torsional vibrations of boring cantilever bars are excited. It is of practical interest to study such vibrations during fine boring of long (or deeply located) holes with a ratio l/d > 3 (l – the length of a boring cantilever bar). In such cases, a coordinate relationship arises between the flexural and torsional forms. A number of experimental studies have been carried out to assess this relationship and the effect on the emergence of an increasing vibration level. The work studies the features of joint flexural-and-torsional vibrations, the relationship between amplitudes and frequencies, and vibration modes’ effect on the loss of vibration resistance. The experiments were carried out on a test bench assembled based on a finishing-boring machine. Measurements were made by strain and piezometric sensors. Samples of steel and cast iron were bored. The criterion for the cutter resharpening was the relative radial wear and the machined surface roughness.

2 citations

References
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Book
13 Apr 2000
TL;DR: In this paper, the authors discuss the application of metal cutting to manufacturing problems, including the design of real-time trajectory generation and interpolation algorithms, and CNC-oriented error analysis.
Abstract: Metal cutting is a widely used method of producing manufactured products. The technology of metal cutting has advanced considerably along with new materials, computers, and sensors. This new edition treats the scientific principles of metal cutting and their practical application to manufacturing problems. It begins with metal cutting mechanics, principles of vibration, and experimental modal analysis applied to solving shop floor problems. Notable is the in-depth coverage of chatter vibrations, a problem experienced daily by manufacturing engineers. The essential topics of programming, design, and automation of CNC (computer numerical control) machine tools, NC (numerical control) programming, and CAD/CAM technology are discussed. The text also covers the selection of drive actuators, feedback sensors, modeling and control of feed drives, the design of real time trajectory generation and interpolation algorithms, and CNC-oriented error analysis in detail. Each chapter includes examples drawn from industry, design projects, and homework problems. This book is ideal for advanced undergraduate and graduate students, as well as practicing engineers.

1,854 citations

Journal ArticleDOI
TL;DR: Magnetorheological (MR) fluids, foams and elastomers comprise a class of smart materials whose rheological properties may be controlled by the application of an external magnetic field.

1,104 citations

Journal ArticleDOI
TL;DR: A intelligent recognition system, composed of the feature extraction and the SVM, has an accuracy rate of 95% for the identification of stable, transition and chatter state after being trained by the experiment data.

220 citations

Journal ArticleDOI
TL;DR: In this article, an innovative chatter suppression method based on a magnetorheological (MR) fluid-controlled boring bar for chatter suppression is developed, which changes stiffness and undergoes a phase transformation when subjected to an external magnetic field, is applied to adjust the stiffness of the boring bar and suppress chatter.

111 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present regenerative chip and regenerative areal cutting edge contact length based dynamic cutting force models, which consider cutting conditions and turning tool geometry, and use Nyquist stability criterion to predict chatter stability.
Abstract: The accurate prediction of chatter stability in general turning operations requires the inclusion of tool geometry and cutting conditions This paper presents regenerative chip and regenerative chip arealcutting edge contact length based dynamic cutting force models, which consider cutting conditions and turning tool geometry The cutting process is modeled as it takes place along the equivalent chord length between the two end points of the cutting edge The regenerative chip model is simple, and the stability can be solved directly However, the three-dimensional model considers the effect of tool vibrations at the present and previous spindle revolutions on the chip area, chord length, and force directions and is solved using Nyquist stability criterion The penetration of worn tool flank into the finish surface is considered as a source of process damping The effects of the nose radius, approach angle of the tool, and feedrate are investigated The proposed stability model is compared favorably against the experimental results

109 citations