Papers by Author: Jung Il Park

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Authors: Yuri M. Baron, S.L. Ko, Jung Il Park
Abstract: This paper analyzes the effectiveness of using Magnetic Abrasive Finishing (MAF) to remove burrs on drilled holes located on planes. Basic elements of the equipment in this method are a magnetic inductor; powder with magnetic and abrasive properties, which serves as the cutting tool; and the face electromagnetic inductor and the vibrating table, which were developed for deburring and finishing on flat surfaces. The performance of magnetic abrasive powders produced by industry is also evaluated. A new technique was developed to compare the performance of the magnetic abrasive powders and to find the powder that is appropriate for finishing and deburring drilled holes placed on a plane steel surface.
291
Authors: S.L. Ko, Yuri M. Baron, Jung Il Park
Abstract: Several types of inductors with permanent magnets for deburring using the MAF process were investigated in this paper. The magnetic intensity of each system was measured at working gap to determine the proper system. Using the inductor with a permanent magnet, which was designed and manufactured as a result of the investigation, the heterogeneity of the finishing process and the variations in the location of the magnet poles and the amount of the powder were analyzed during the deburring process. The characteristic curve was calculated from the experimental data and used to compare the performance of each inductor. Under similar conditions, the permanent magnet inductor showed superior performance compared to the electromagnetic inductor in the deburring process.
237
Authors: Jung Il Park, S.L. Ko, Y.H. Hanh, Yuri M. Baron
Abstract: Micro burrs formed in micro parts are not subject to be removed by the conventional deburring method for marco parts. Magnetic abrasive deburring method which was proved to be effective for small burrs are applied for deburring the micro burr in electric gun parts used in TV monitor. A specific magnetic inductor is designed and manufactured for this part. To improve the deburring performance, vibration table is used for increasing the relative velocity. To evaluate the deburring capability and surface finishing, edge shape, surface roughness and composition of surface material are measured precisely. It is verified the chemical composition of surface is not affected by the powder composition when the proper powder are used with coolant.
259
Authors: Yuri M. Baron, S.L. Ko, Jung Il Park
Abstract: In this paper, the new technique involving comparison and optimization of conditions for Magnetic Abrasive Finishing (MAF) is suggested, taking into account the basic laws stated for process MAF. The formulas for the calculation of the criteria for optimization are created when the process MAF is used for polishing, removal of burrs, and other purposes. The application of the technique is shown in an experiment on the optimization conditions for the removal of burrs after drilling using the MAF method. The technique can be used after standards for this process are developed.
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