Eigensolution of a BTA deep-hole drilling shaft system

Ma, Guohong; Shen, Xingquan

doi:10.1007/s12206-018-0303-9

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…proposed a dynamic model that considers force, bit deflection, and hole wall deformation, and pointed out that the edge radius of the gun drill would have an effect on the deflection of the hole axis. Ma et al (Ma and Shen, 2018) proposed the lateral vibration control equation of the drilling system, and pointed out that appropriate rotation angular velocity and support constraints can improve the stability of the system. Li et al proposed a prediction model of hole straightness deviation in the process of multi-support deep hole drilling.…”

Section: Introductionmentioning

confidence: 99%

Retraction: Study on straightness deviation control in the BTA deep hole drilling based on thermal-mechanical coupling simulation method

Zhu

Zhang

Li³

et al. 2021

JAMDSM

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Nickel-based superalloys also have super high strength at high temperatures, which are typically difficult to be processed. As the material of hydraulic parts, aircraft engines, and downhole intelligent tools, it has the characteristics of large cutting deformation, severe work hardening, and low thermal conductivity in deep hole machining, which will lead to the problem of poor straightness of the deep hole. In order to solve the problem of poor straightness of the deep hole in machining nickel-based superalloys, a three-dimensional finite element model of BTA deep hole drilling based on thermal-mechanical coupling is established, and the influence of different blade angles, rotation speeds, and feed rates on drilling force is calculated. The prediction model of drilling force is obtained based on the response surface regression analysis method, and the multi-objective optimization of blade angle, rotation speed, and feed rate are carried out by using the random direction search method. The BTA deep hole drilling experiments are carried out by using the optimized tool and process parameters, and the effects of different process parameters on the straightness of the deep hole of nickel-based superalloys are analyzed. The results of the research show that: Different rotation speeds and feed rates will lead to different degrees of strain hardening and thermal softening. This will lead to a significant difference in the value of the drilling force on the tool. The straightness deviation of the deep hole in nickel-based superalloys can be controlled by optimizing the tool structure and process parameters. The research work in this paper can provide a basis for the structural design of the BTA tool and optimization of process parameters.

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Section: Introductionmentioning

confidence: 99%

Retraction: Study on straightness deviation control in the BTA deep hole drilling based on thermal-mechanical coupling simulation method

Zhu

Zhang

Li³

et al. 2021

JAMDSM

View full text Add to dashboard Cite

show abstract

“…Te complexity of its motion state lies in the simultaneous rotation and axial feed of the boring bar, accompanied by the infow and outfow of cutting fuid. Te analysis of the chaotic characteristics of the system is crucial in elucidating the impact of parameter changes on system stability, which is essential for overcoming the quality bottleneck in deep-hole parts processing [9][10][11][12]. At present, there is no general analytical paradigm for analyzing a complex nonlinear dynamic system [13][14][15][16], which also brings great challenges to the dynamic stability analysis of complex BTA deep-hole machining system with mechanical, electrical, and hydraulic multifeld coupling.…”

Section: Introductionmentioning

confidence: 99%

The Chaotic Property of BTA Deep-Hole Machining System under the Effect of Inner Cutting Fluid

Zhang

Zhao

et al. 2023

Shock and Vibration

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To clarify the action mechanism of parameter change on system stability, the chaotic property of BTA deep-hole machining system under the effect of inner cutting fluid was analyzed. According to the kinematic characteristics of the internal cutting fluid and the equation of the moment of momentum of the system, the kinematic equation of the boring bar considering the effect of the internal fluid was established. The critical conditions of chaos were deduced according to the Hamiltonian function and Melnikov function of the plane near-Hamilton system. The mechanism of the liquid filling ratio, cutting fluid flow velocity, and frequency ratio parameters on the system’s critical instability surface is investigated. The correlation and sensitivity of influencing factors, such as filling ratio and frequency ratio, and cutting fluid flow velocity to the sensitivity of system chaos are explored. The results show that in precision machining, the change of liquid filling ratio is positively related to the stability of the system, the change of cutting fluid flow velocity is negatively correlated with the stability of the system, and the change of frequency ratio has no monotonicity effect on the stability of the system. The sensitivity of the chaotic characteristics of the system to each parameter is bounded by the filling liquid ratio h = 0.58. When 0 ≤ h ≤ 0.58, frequency ratio ω ¯ > filling ratio h > cutting fluid flow velocity V0; when 0.58 < h ≤ 1, filling ratio h > frequency ratio ω ¯ > cutting fluid flow velocity V0. These research conclusions can lay a certain theoretical foundation for the analysis, control, and optimization of the complex mechanical behavior of BTA deep-hole machining systems in engineering practice.

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“…In the absence of a primary source of dissipation, Riley damping is responsible for the low-frequency behavior with mass dependence and the high-frequency behavior is related to a stiffness dependence. The assumption of annular drilling fluid as Riley damping can result in more accurate predictions [14,15]. The damping force is introduced while applying the mass proportional to the damping coefficient, which is caused by the absolute velocity of each node.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation Diagram and Dynamic Response of a Drill String Applied in NGH Drilling

Wang

Liu

et al. 2022

Processes

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Natural gas hydrate (NGH) is a kind of unique resource among hydrocarbon fuels. It is stable within its sedimentary hosts and will only convert to its constituent gas and water phases relatively quickly if reservoir pressure-temperature conditions are artificially disturbed. The unwanted vibrations from the drill string with the complex external environment and excitation usually cause instability in the NGH. In this paper, a nonlinear mathematical model is presented taking into account the fluid–solid coupling vibration caused by the drilling fluid inside and outside the drill string, the non-smooth rub-impact between the drill string and borehole wall, and the influence of centralizer setting interval on nonlinear resonant vibration of the drill string. The relationship between the variable parameters of the drill string and the complex dynamics of the drill string is analyzed. Finally, the bifurcation diagram is given. The results show that the system response exhibits complex dynamic behavior due to rub-impact and nonlinear effects. However, there is always a suitable parameter in the bifurcation diagram of each parameter change, so that the amplitude of the system is small and the failure probability of the drill string is reduced. The research results have reference significance for exploring the nonlinear dynamic mechanism of a drill string under complex working conditions and reasonably optimizing drilling parameters.

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Eigensolution of a BTA deep-hole drilling shaft system

Cited by 5 publications

References 18 publications

Retraction: Study on straightness deviation control in the BTA deep hole drilling based on thermal-mechanical coupling simulation method

Retraction: Study on straightness deviation control in the BTA deep hole drilling based on thermal-mechanical coupling simulation method

The Chaotic Property of BTA Deep-Hole Machining System under the Effect of Inner Cutting Fluid

Bifurcation Diagram and Dynamic Response of a Drill String Applied in NGH Drilling

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