Identification of dynamic properties of boring bar vibrations in a continuous boring operation

Andrén, Linus; Håkansson, Lars; Brandt, Anders; Claesson, Ingvar

doi:10.1016/s0888-3270(03)00093-1

Cited by 49 publications

(37 citation statements)

References 25 publications

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“…(18) and (19) obtaining the values of variables Y and t that satisfy Eq. (16) with the condition s ¼ ib.…”

Section: Stability Analysismentioning

confidence: 99%

“…The mode coupling was experimentally analyzed for a range of cutting parameters. The analysis of boring-bar vibrations is usually based on the lowerorder bending modes of the clamped boring bar [18], although the clamping conditions of the bar also influences its dynamic properties [19]. Zhang and Kapoor [20] developed a two-degreeof-freedom model of a clamped boring bar with four cutting-force components.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of chatter stability in boring operations with passive vibration absorbers

Miguélez

Rubio

Loya

et al. 2010

International Journal of Mechanical Sciences

115

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This paper is focused on the behavior of boring bars with a passive dynamic vibration absorber (DVA) for chatter suppression. The boring bar was modeled as a cantilever Euler-Bernoulli beam and only its first mode of vibration was considered. The stability of the two-degree-of-freedom model was analyzed constructing the stability diagram, dependent on the bar characteristics and on the absorber parameters (mass, stiffness, damping, and position). Two analytical approaches for tuning the absorber parameters were compared. The selection criterion consisted on the maximization of the minimum values of the stability-lobes diagram. Subsequent analysis performed in this work, allowed formulating of new analytical expressions for the tuning frequency improving the behavior of the system against chatter.

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“…(18) and (19) obtaining the values of variables Y and t that satisfy Eq. (16) with the condition s ¼ ib.…”

Section: Stability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of chatter stability in boring operations with passive vibration absorbers

Miguélez

Rubio

Loya

et al. 2010

International Journal of Mechanical Sciences

115

View full text Add to dashboard Cite

show abstract

“…It is long and slender and is thus sensitive to excitation forces introduced by the material deformation and chip formation process in the turning operation. According to [13], the internal turning bar is generally the weakest link in the cutting system of the lathe.…”

Section: Introductionmentioning

confidence: 99%

“…Several works have aimed at the development of more stable tools ( [12] when analyzing clamping conditions [13], by analysis of vibration spectra, and [18] by the introduction of absorbers). They allow for working with higher overhangs (or L/D ratios).…”

Section: Introductionmentioning

confidence: 99%

Tool vibration in internal turning of hardened steel using cBN tool

Suyama

Diniz

Pederiva

2016

Int J Adv Manuf Technol

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The machining of hardened materials with hardness over 45 HRC has been an alternative to grinding since the 1970s, with the commercial availability of cubic boron nitride (cBN) and ceramic tools. However, the low toughness of these types of tool materials makes them very sensitive to damages caused by vibrations, which are critical for operations like internal turning, where the tool resembles a cantilever beam and therefore is susceptible to large deflections. This work aims to contribute to the study of tool performance in internal turning of long holes in hardened AISI 4340 steel in finishing conditions. Different machining conditions, two different tool holders (steel and carbide), and several tool overhangs were tested. The surface finish, acceleration (vibration) signals, and tool wear of cBN inserts were evaluated. The results show that vibration and the material of the tool holder may play a secondary role in the surface finish for stable turning, but the use of carbide tool holders makes the process stable for longer tool overhangs. Moreover, when the cutting becomes unstable, surface roughness is increased severely.

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“…Yong et al [18] proposed an active and adaptive vibration control system to automatically detect sinusoidal vibration parameters in a cantilever beam and generate a control signal to cancel the vibration. L. Andren et.al [19] measured boring bar vibrations in direction of cutting speed and cutting depth with accelerometers. They inferred the vibrations to be influenced by non-stationary parameters not in operator's control.…”

Section: Introductionmentioning

confidence: 99%

Study of Chip Reduction Coefficient in Boring Operation Using Metal Laminates at the Tool-Holder Interface

Mohanty¹

2014

IJIRSET

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ABSTRACT:Internal machining processes, such as boring operation are challenged by inherent tool vibrations. These vibrations can be damped to considerable extent employing suitable arrangement to dissipate part of strain energy. The present research has used a set of metal laminates at the tool and tool holder interface. The arrangement which promotes frictional energy dissipation has resulted in improvement of machinability, measured in terms of Chip reduction Coefficient.

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Identification of dynamic properties of boring bar vibrations in a continuous boring operation

Cited by 49 publications

References 25 publications

Improvement of chatter stability in boring operations with passive vibration absorbers

Improvement of chatter stability in boring operations with passive vibration absorbers

Tool vibration in internal turning of hardened steel using cBN tool

Study of Chip Reduction Coefficient in Boring Operation Using Metal Laminates at the Tool-Holder Interface

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