Analysis of stability in Turning with Secondary effects

Tulasiramarao, B.; Srinivas, K.; Reddy, P. Ram Kishore Kumar

doi:10.9790/1684-1403050417

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Substituting these coefficients into (21), we obtain an equation in terms of three variables, that is, C 2 , C 3 , and Ω. Substituting (21) into the boundary equations at z � 1 (see [17] and [18]) and solving the two variables C 2 and C 3 , we can obtain the following equation:…”

Section: Y(z) � 􏽘mentioning

confidence: 99%

“…Litak [16] analyzed the vibrations generated by vertical cutting and used a one-degree-of-freedom model to simulate the complex system of regenerative cutting. In the field of mode coupling, Tulasiramarao et al [17] analyzed the stability of the coupling between the cutting tool and the machined workpieces. KalmárNagy and Moon [18] studied the mode coupling of the vibrations.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Vibration and Chatter Stability of a Tapered Composite Boring Bar

Zhang

Ren

et al. 2020

Shock and Vibration

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As metal boring bars have low dynamic stiffness, chatter is easily induced during the boring process. Therefore, improvement of the chatter stability is an open problem that requires further study. Though researchers proved that the composite materials suitable for making tapered boring bars can further improve the dynamic stiffness to meet the need of high-speed boring, existing research studies did not study the dynamic characteristics of the tapered composite boring bar comprehensively. In particular, no research has been done about the natural frequency and chatter stability of the composite boring bar under various taper ratios. Therefore, in this paper, a model of a tapered composite boring bar is established based on the Adomian modified decomposition method (AMDM). Second, this paper verifies the effectiveness of the AMDM by using the ANSYS software. Moreover, this paper studies the natural frequency of the boring bar model under various situations. Third, we verify the convergence of chatter stability of the boring bar model. Finally, the chatter stability of the tapered composite boring bar is analyzed comprehensively. The results show that the natural frequency and the chatter stability of the tapered model can be improved by choosing appropriate taper ratio, ply angle, stacking sequences, L/D ratio, T/D ratio, and the carbon composite. The results are helpful for the design of high-quality tapered composite boring bars matching the need of high speed cutting. In particular, these results can provide guidelines for adjusting the cutting speed in CNC boring and can further improve the surface finish of the machined workpieces.

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Section: Y(z) � 􏽘mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Vibration and Chatter Stability of a Tapered Composite Boring Bar

Zhang

Ren

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…When chatter occurs, the surface finish of the cut will be poor, the cutting efficiency will be lowered, and the cutter may be destroyed. To overcome the problem of chatter and to effectively improve the chatter stability during boring, researchers have conducted many studies [1][2][3][4][5][6][7][8][9][10]. Based on the different methods of vibration reduction and control of a boring bar, these studies can be divided into the following three categories.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Composite Boring Bar Dynamic Characteristics Considering Shear Deformation and Rotational Inertia

Zhang

Ren

et al. 2020

Applied Sciences

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A boring bar is a tool used to install cutters and transfer power during boring. Because the boring bar in a narrow workspace is usually slender, chatter often occurs in the boring process. To improve the chatter stability of the boring bar, researchers have designed composite material boring bars with high dynamic stiffness to meet the requirements of high-speed boring. However, the effect of the shear deformation and rotational inertia were ignored. In this paper, a model of a composite boring bar considering shear deformation and rotational inertia is established based on the Adomian Modified Decomposition Method (AMDM). The dynamic characteristics, such as the vibration mode shapes, natural frequency, and chatter stability of the composite boring bar considering the shear deformation and rotational inertia, are analyzed comprehensively. The analysis results show that, when the shear deformation and rotational inertia are considered, the composite boring bar can exhibit different vibration mode shapes. Moreover, the natural frequencies and the cutting depth will be reduced. The results are helpful to improve the understanding about dynamic characteristics of the composite boring bar, and to provide guidance for designing of boring bars. Moreover, accurate adjustment of the cutting speed and depth in CNC boring can be based on the analysis results.

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Analysis of stability in Turning with Secondary effects

Cited by 2 publications

References 8 publications

Analysis of the Vibration and Chatter Stability of a Tapered Composite Boring Bar

Analysis of the Vibration and Chatter Stability of a Tapered Composite Boring Bar

Analysis of the Composite Boring Bar Dynamic Characteristics Considering Shear Deformation and Rotational Inertia

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