A study on the experimental investigation of low frequency vibration wave assisted disassembly of press-fit joints

Essola, Dieudonné; Offole, Florence; Joseph, Nkongho Anyi; Abbe, Claude Valéry Ngayihi; Achille, Njomoue Pandong; Nelson, Zanga Crick

doi:10.1016/j.jmapro.2019.11.014

Cited by 8 publications

(10 citation statements)

References 21 publications

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“…The equation ( 3) is the target function to determine process time to obtain certain degree of cleanliness depending on amplitude and frequency combination. It permits to characterize the rate of dust being removed trough equation (2). Almost identical structure of equation is obtained while dealing with rust but with different coefficients relatively similar to the one above that lead us to the same explanation of the process.…”

Section: Resultsmentioning

confidence: 91%

“…By considering full factorial plan designs with three factors, each at two levels as shown in Table 2 mathematical processing of experimental results allowed to determine the target cleanliness function (2) and also the equation characterizing the dependence of the paint removal (3) on the amplitude, frequency of oscillations and processed time is:…”

Section: Resultsmentioning

confidence: 99%

“…Actually the task in view before machine building engineers is for substantial increase in operational, 1 quantity and quality indicators of production with continuous growth of the volume of its release. 2 One of the directions of the resolution of this problem is effective by monitoring operational parameters of production machines 3,4 that provide desired quality of product in term of production cost, mechanical, environmental and functional characteristics. According to the stated production aim of bringing out new product or executing permanent maintenance service and reparation of objects of manufactures.…”

Section: Introductionmentioning

confidence: 99%

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Low frequency vibratory cleaning of paint and rust contaminants from machines parts

Essola

Njomoue

Offole

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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This work investigates the effect of low frequency vibratory processing for cleaning and washing various machine components parts from rusts and old paints deposits. The experimental investigation was carried out with special prepared samples that were weighted and exposed to paints and rust contaminants. These samples were treated in universal horizontal vibration machine UVHM 4 × 10 with different combination of instrumental processing medium, process fluid, machine amplitude and frequency of oscillations. They were periodically reweighted after processing and compared to etalon with control of quantity of dust that have been removed, sample cleanliness and also other functional parameters. Statistical analysis has been used to characterize ongoing process and full factorial analysis to establish experimental parameters dependency. The result is showing the complex dependence of samples cleanliness to each processing parameters like processing time, amplitude of oscillations, frequency of oscillations, process fluid parameters, instrumental medium, etc. Between this parameters although the most important successively the amplitude of oscillations, the frequency of oscillations the processing medium and the processing fluid depending to his considered composition, the optimal processing time can be reach only by complex combination of all this parameters every of them carry an amplify coefficient. Low frequency oscillations can be used to monitor and optimize washing and cleaning operations of paints and rusts contaminations. That guarantees process automation, its effectiveness for a large industrial application.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low frequency vibratory cleaning of paint and rust contaminants from machines parts

Essola

Njomoue

Offole

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

Self Cite

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“…The disadvantages include, without limitation, plastic deformation of the material during the assembly process [5]. Damage may also occur during repeated joint disassembly and assembly, which is why the authors of [6] proposed an innovative solution permitting joint disassembly in a relatively only slightly invasive way. Those authors use low-frequency vibrations.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, a linear regression is used, which represents the approximation of the given values by a straight line by the method of least squares. The following Relations (2) to (6) represent the derivation of the calculations of the α shape parameter and the β scale parameter of the Weibull distribution from the cumulative function F(t) [22,23].…”

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confidence: 99%

Failure Analysis and the Evaluation of Forced-in Joint Reliability for Selected Operation Conditions

et al. 2021

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In this article, sample damage and wear of forced-in joints is presented, and their reliability evaluated. Compared were shafts without additional finish treatment, rolled shafts and those with a TiSiN coating. Tribological samples under investigation operated in rotational bending conditions. Recorded was the number of fatigue cycles at which damage might occur. Reliability indicators were plotted, which demonstrated that coated shafts are distinguished by the highest reliability and low damage intensity. Macroscopic observations of shaft surfaces demonstrated the traces of adhesive wear and, in the case of shafts without additional treatment and in the case of rolled shafts, fretting wear traces in the form of a ring comprising the entire shaft circumference. Microscopic observations showed numerous build-ups on the surface, microcracks, and the occurrence of wear products in the gap between the shaft and sleeve. The highest fatigue strength was demonstrated by shafts with a TiSiN coating. The shaft section change area was the place where fatigue wear occurred.

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Failure analysis of the elements of a forced-in joint operating in rotational bending conditions

Kowalski

2020

Engineering Failure Analysis

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A study on the experimental investigation of low frequency vibration wave assisted disassembly of press-fit joints

Cited by 8 publications

References 21 publications

Low frequency vibratory cleaning of paint and rust contaminants from machines parts

Low frequency vibratory cleaning of paint and rust contaminants from machines parts

Failure Analysis and the Evaluation of Forced-in Joint Reliability for Selected Operation Conditions

Failure analysis of the elements of a forced-in joint operating in rotational bending conditions

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