Discrete Element Modelling of Drag Finishing

Uhlmann, Eckart; Eulitz, Alexander; Dethlefs, Arne

doi:10.1016/j.procir.2015.03.021

Cited by 40 publications

(18 citation statements)

References 29 publications

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“…This can provide better machining effectiveness and technical quality of the surface machined. This is particularly important if it is possible to fix and direct an object by a clamping device [8]. Surf-Finisher from Rösler Oberflächentechnik GmbH (Germany) is an example of this type of device.…”

Section: Introductionmentioning

confidence: 99%

Determining kinetic energy distribution of the working medium in a centrifugal disc finishing process—part 1: theoretical and numerical analysis with DEM method

Sutowski

Plichta

Kaldunski

2019

Int J Adv Manuf Technol

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The centrifugal disc finishing process is an abrasive technique of mass machining, and it is very effective but very frequently time consuming. In this paper, a simulation of the centrifugal disc finishing process was presented in order to estimate the kinetic energy distribution of the working medium and to find its regions that make the process more efficient. Numerical results were obtained using an explicit method in the Ansys/Ls-Dyna program. Due to the fact that the physical properties of numerous objects in free motion need to be calculated in a simulation process, the discrete element method (DEM) was used. Results from the numerical simulations indicate that the velocity and energy of particles is variable in an axial cross-section of working medium. The article presents particle velocity distributions in the working chamber for various rotational speeds of the rotor. The typical changes in velocity in the function of time are also discussed. Statistical important functions of the average kinetic energy of the working medium and accumulated energy by machining surface have been estimated in respect to the rotational speed and machining time with a high value of adjustment coefficients. This article constitutes the first stage of research, which is continued in order to experimentally verify the results in the real process, as presented in the companion paper (Part 2: Experimental analysis with the use of acoustic emission signal).

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Section: Introductionmentioning

confidence: 99%

Determining kinetic energy distribution of the working medium in a centrifugal disc finishing process—part 1: theoretical and numerical analysis with DEM method

Sutowski

Plichta

Kaldunski

2019

Int J Adv Manuf Technol

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“…Uhlmann adopted the simplified Hertz-Mindlin contact force model to study the polishing motion process through the drag finishing method. The simulation model was verified through the experiments [9]. Hou used the discrete element software EDEM to establish the simulation model of the ball milling liner grinding material.…”

Section: Introductionmentioning

confidence: 99%

Cutting edge preparation using the discrete element software EDEM

Zhao

Zheng

Lin

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The high-speed and high-efficient cutting is the future of the mechanical processing technology. The tool edge preparation prolongs the service life of the tool, elevates the machined surface quality and the cutting performance through modification of the cutting edge contour, micro-topography and microstructure in the edge area. It is necessary to study the edge preparation mechanism to realize the importance of the high-speed and high-efficiency cutting. The mathematical model of the milling tool motion trajectory is built up using the edge preparation characteristics of the planetary motion. Based on the basic principle of the discrete element method and the Hertz contact theory, the simulation model of the tool edge preparation process is set up through the discrete element software EDEM. The effects of the speed, the preparation time, the abrasive mesh, the abrasive ratio, the rotation direction on the abrasive state, the abrasive velocity, the cumulated energy, the wear and the action force are investigated. In this paper, the basis for the edge preparation optimization is provided and the importance of the high-speed and high-efficiency machining is highlighted.

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“…The simulation results justified that the common critical depth of cut can't be used as the effective parameters for evaluating brittle to ductile transformation in the ceramic polishing process. Uhlmann et al (2015) researched the drag finishing and modelled the movement of media and workpiece by using the DEM, which was used for determining local contact intensities on the workpiece surface and between particles. Jiang et al (2015) presented a DEM methodology for simulating the grinding process of SiC ceramics.…”

Section: Introductionmentioning

confidence: 99%