A study of cutting process stability of a boring bar with active dynamic absorber

Tewani, Sanjiv G.; Rouch, Keith E.; Walcott, B.L.

doi:10.1016/0890-6955(95)80009-3

Cited by 85 publications

(40 citation statements)

References 14 publications

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“…Tewani et al [35] implemented a dynamic absorber having a force-generating piezo-electric actuator to reduce chatter in boring operation. They demonstrated that amplitude of vibration could be reduced during the experimental trials.…”

Section: Introductionmentioning

confidence: 99%

Investigation into effect of particle impact damping (PID) on surface topography in boring operation

Biju

Shunmugam

2014

Int J Adv Manuf Technol

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This paper presents a novel method, based on the particle impact damping (PID), for the attenuation of regenerative vibration in boring operation. A specially designed boring bar having a cavity near machining-end for partial filling of spherical particles has been developed. Characteristics of boring bar with and without PID have been found from impact and shaker tests. After identifying appropriate particle size and filling volume, experiments are conducted to evaluate the performance in actual boring operations. Additional boring experiments are also conducted to confirm the performance by changing particle size and filling volumes. The collision of the particles in PID is found to attenuate regenerative vibration by the energy dissipation and thus effectively enhances stability of the boring operation. Analysis of effect of PID on surface topography in terms of chatter marks, surface roughness, and roundness of bored holes shows that the proposed method results in improvement of bore quality when compared with a boring bar without PID. It is also established that radial vibration of the boring bar has a significant influence on the surface topography obtained in boring operation.

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Section: Introductionmentioning

confidence: 99%

Investigation into effect of particle impact damping (PID) on surface topography in boring operation

Biju

Shunmugam

2014

Int J Adv Manuf Technol

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“…More recently, practical and optimised designs for tooling with embedded absorbers have been developed [2], and non-traditional absorber designs have been proposed, such as those based upon impact dampers [3] and particle dampers [4]. Active vibration absorbers [5,6] have also been proposed, since they can be more easily tuned than passive systems and can enable higher levels of energy dissipation. This approach is a special case of active vibration control, which has been applied to various machining chatter problems [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Vibration absorbers for chatter suppression: A new analytical tuning methodology

Sims

2007

Journal of Sound and Vibration

178

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Vibration absorbers have been widely used to suppress undesirable vibrations in machining operations, with a particular emphasis on avoiding chatter. However, it is well known that for vibration absorbers to function effectively their stiffness and damping must be accurately tuned based upon the natural frequency of the vibrating structure. For general vibration problems, suitable tuning strategies were developed by Den Hartog and Brock over 50 years ago. However, the special nature of the chatter stability problem means that this classical tuning methodology is no longer optimal. Consequently vibration absorbers for chatter mitigation have generally been tuned using ad-hoc methods, or numerical or graphical approaches. The present article introduces a new analytical solution to this problem, and demonstrates its performance using time domain milling simulations. A 40-50% improvement in the critical limiting depth of cut is observed, compared to the classically tuned vibration absorber.

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“…Hence, it is very important to suppress and control the adverse effects of regenerative chatter. Various techniques are proposed in the literature for regenerative chatter suppression including passive and active methods [47,48]. Active chatter absorbers result in a better performance and robustness, in general.…”

Section: Examplementioning

confidence: 99%

An adaptive tracking problem for a family of retarded time‐delay plants

Momeni¹,

Aghdam²

2007

Adaptive Control & Signal

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Most of the existing switching control techniques are developed specifically for finite-dimensional linear time-invariant (LTI) systems. In many practical applications, however, it is essential to take time delay into consideration in the modelling as the control system can be highly sensitive to delay. In this paper, a multi-model switching control algorithm is proposed for retarded time-delay systems. It is assumed that the plant is represented by a family of known multi-input multi-output, observable, LTI models with multiple delays in the states, and that corresponding to each model in the known family, there exists a high-performance finite-dimensional LTI controller. In addition, it is supposed that a bound on the magnitude of the external inputs and disturbances is available. It is then shown that the proposed switching controller can stabilize the uncertain system, and that under some mild conditions, output tracking can be achieved in the given problem setting.

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A study of cutting process stability of a boring bar with active dynamic absorber

Cited by 85 publications

References 14 publications

Investigation into effect of particle impact damping (PID) on surface topography in boring operation

Investigation into effect of particle impact damping (PID) on surface topography in boring operation

Vibration absorbers for chatter suppression: A new analytical tuning methodology

An adaptive tracking problem for a family of retarded time‐delay plants

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