Noise and vibrations in machine tools

Wegener, Konrad; Bleicher, Friedrich; Heisel, Uwe; Hoffmeister, Hans‐Werner; Möhring, Hans‐Christian

doi:10.1016/j.cirp.2021.05.010

Cited by 22 publications

(6 citation statements)

References 125 publications

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“…When a chip is attached to the tool surface, it becomes hard and causes collision between the cutting tool and the workpiece [24,25]. The collision between the tool and the workpiece is confirmed as a non-periodical impact signal in vibration, which can be analyzed through statistics [26].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Tool-Condition Diagnosis Model with Shock-Sharpening Algorithm for Drilling Process

Park

Lee

Yeo

et al. 2022

Sensors

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Fault diagnosis systems are used to improve the productivity and reduce the costs of the manufacturing process. However, the feature variables in existing systems are extracted based on the classification performance of the final model, thereby limiting their applications to models with different conditions. This paper proposes an algorithm to improve the characteristics of feature variables by considering the cutting conditions. Regardless of the frequency band, the noise of the measurement data was reduced through an oversampling method, setting a window length through a cutter sampling frequency, and improving its sensitivity to shock signal. An experiment was subsequently performed to confirm the performance of the model. Using normal and wear tools on AI7075 and SM45C, the diagnosis accuracies were 97.1% and 95.6%, respectively, with a reduction of 85% and 83%, respectively, in the time required to develop a diagnosis model. Therefore, the proposed algorithm reduced the model computation time and developed a model with high accuracy by enhancing the characteristics of the feature variable. The results of this study can contribute significantly to the establishment of a high-precision monitoring system for various processing processes.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Tool-Condition Diagnosis Model with Shock-Sharpening Algorithm for Drilling Process

Park

Lee

Yeo

et al. 2022

Sensors

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“…Additionally, it is of increasing interest to perform harmonic analysis to control noise and vibration from machine tools [10,11] and how they relate to the gear geometry [12,13].…”

Section: Introductionmentioning

confidence: 99%

Characterisation and evaluation of the harmonic content of involute gear surface deviations

Reavie,

Frazer,

Przyklenk

et al. 2024

Eng. Res. Express

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Gears are fundamental precision components that are crucial to many industries, including the wind energy sector.They are traditionally analysed using profile and helix line measurements but this does not consider the majority of the contacting surface with intricate surface variations that dictate functional performance.Practical measurement and evaluation of involute gear surfaces remain underexplored.This paper uses the Fourier and wavelet transforms to evaluate measured gear surface deviation harmonic content for a single trace, a trace set, and surface analysis and describes the utility of each.The methods are first demonstrated with synthetic data and then with measured data, then the measured data is simulated in a quasi-static FE tooth contact analysis, which yields insights not solely gleaned from harmonic analysis.The uncertainty of harmonic content analysis is to be established in future work, but the uncertainty of the simulated functional performance may be a more useful metric for measurement.

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“…The vibrations generated in this way are characterised by different frequencies, paths of their transmission being different as well. The mobile machine moving over uneven ground creates excitations in the frequency range from 0.5 to 250 Hz (Yupapin & Pornsuwancharoen, 2019;Abdelkareem et al, 2021), which also contributes to the generation and propagation of noise due to the mechanical connection of the elements of the hydraulic system, which is done through hoses and common fastenings (Wegener et al, 2021;Cao et al, 2019). In this frequency band, there are excitations from the driving engine (internal combustion engine) related to the kinematics of the displacement pump, which manifest themselves in the pressure pulsations in the machine's hydraulic system (Bach et al, 2017;Xu et al, 2023;Pang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The Impact of Mechanical Vibrations on Hydraulic Valves and the Possibility of Reducing the Effects

Stosiak,

Skačkauskas,

Deptuła

2024

Aviation

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The paper shows that mechanical vibrations occur in a wide frequency range in the hydraulic systems operating in the real world. Hydraulic valves are also exposed to these vibrations. The paper gives examples of vibration sources and suggests that the influence of vibrations on hydraulic valves could be reduced. Particular attention was paid to the vibrating proportional distributor. The amplitude-frequency spectrum of pressure pulsation in a hydraulic system with a vibrating proportional distributor was analysed. During the tests, the frequency of external mechanical vibrations acting on the proportional distributor and their direction was changed.

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Noise and vibrations in machine tools

Cited by 22 publications

References 125 publications

Tool-Condition Diagnosis Model with Shock-Sharpening Algorithm for Drilling Process

Tool-Condition Diagnosis Model with Shock-Sharpening Algorithm for Drilling Process

Characterisation and evaluation of the harmonic content of involute gear surface deviations

The Impact of Mechanical Vibrations on Hydraulic Valves and the Possibility of Reducing the Effects

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