Bulk mass flow in a vibratory finisher: mechanisms and effect of process parameters

Maciel, Lucas da Silva; Spelt, J.K.

doi:10.1007/s10035-018-0830-1

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…The DEM simulation of BCVF was performed using the commercial software EDEM. The Hertz-Mindlin (no-slip) model has been confirmed to be suitable to explain the "media-component" interaction in vibratory finishing [12,[14][15][16][17]20]. In this model, the normal force component is based on Hertzian contact theory [21], and the tangential force model is based on the work of Mindlin-Deresiewicz [22].…”

Section: Simulation Parametersmentioning

confidence: 99%

“…Recently, the discrete element method (DEM) is a widely accepted numerical method specialized in dealing with contact and collision problems in granular systems. Da Silva et al [14,15] utilized DEM to confirm the mechanism of bulk flow formation in tub vibratory finisher and predict the average particle speed under different parameters. They [16] also studied the relationship between wall-media contact forces and media behavior.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of a novel bidirectional composite vibratory finishing

Yang¹,

Wang³

et al. 2022

Preprint

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Given the poor accessibility of the current finishing process for parts with complicated geometries, a novel bidirectional composite vibratory finishing (BCVF) approach is presented, which combines the power actions on abrasive particles and processed workpieces. The discrete element method (DEM) was used to obtain a fundamental understanding of the BCVF process. By comparing different processes, it has been demonstrated that the BCVF promotes the mobility of abrasive particles to improve the finishing results and efficiency further. The characteristics of normal and tangential contact on the surface of the workpiece involved in the BCVF process were analyzed. Meanwhile, the effects of container size (or wall effects), media amount, workpiece position, and vibration parameters (including vibration amplitude and frequency) on the media-component interactions were systematically studied. The results show that the distance between the workpiece and the container wall in the y-direction can be reduced to 4d (d is the abrasive particle diameter) without affecting the finishing effect. In addition, with the enhancing vibration in the x-direction, particle impact and shear effects are subsequently strengthened. In contrast, the media amount above the workpiece and the z-directional vibration is mainly effective for the shear effect. Overall, the process can enhance the impact and shear effects simultaneously through composite vibration.

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Section: Simulation Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical investigation of a novel bidirectional composite vibratory finishing

Yang¹,

Wang³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…They evaluated the topography of the surface to examine the anisotropy lost during different conditions and cases in the polishing process. Da Silva Maciel and Spelt [33][34][35][36] investigated the mechanism of the abrasive particle's motion in the vibratory tube employing the two-dimensional discrete element method to find out effective parameters of the vibratory process. They computed the effect of the process parameters and the relation of particle and container wall speeds with the exerted forces to the workpiece.…”

Section: Introductionmentioning

confidence: 99%

Surface roughness study of polyamide in nano-metric polishing using low-frequency acoustic energy

Beigmoradi

Vahdati

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Polymers have gained the attention of manufacturers due to their significant advantages such as low density, high corrosion resistance, and high humidity resistance. Producing high-precision polymeric components is one the most challenging issues especially in fabricating complex or micro-scale systems. Some of the machining techniques such as electro discharge machining (EDM) and electrochemical machining (ECM) cannot be employed for machining the non-conductive parts. Using abrasive particles is one of the best options for machining these types of materials. In this work, the capability of the acoustic energy for machining polyamide (PA) workpieces is studied. To this end, an experimental setup is installed and design of experiment (DoE) algorithm is employed to survey the effect of process parameters on surface roughness. Three parameters at three levels are considered as the effective factors of the process and the sensitivity of the surface roughness on the process factors is investigated. In the next step, a hybrid finite element/boundary element approach was used to discuss the relation of process parameters to the vibrational characteristics of the container, then the mechanism of the process was investigated employing the discrete element method. Finally, the surface topology of the optimal workpiece before and after the process was presented and compared. It was observed that acoustic energy can be considered as a vibration source of the container’s floor to provide kinetic energy for machining PA parts on the nano-metric scale. Moreover, it was found that the initial roughness of the workpiece and the chosen parameters play a crucial role in the machining process. Experimental results show that in this technique by selecting appropriate process factors the surface roughness can be reduced up to 50%.

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Kinematics and machinability using bidirectional composite vibratory finishing

Yang

Wang

et al. 2023

Int J Adv Manuf Technol

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Bulk mass flow in a vibratory finisher: mechanisms and effect of process parameters

Cited by 11 publications

References 20 publications

Numerical investigation of a novel bidirectional composite vibratory finishing

Numerical investigation of a novel bidirectional composite vibratory finishing

Surface roughness study of polyamide in nano-metric polishing using low-frequency acoustic energy

Kinematics and machinability using bidirectional composite vibratory finishing

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