| Summary: | 碩士 === 華梵大學 === 機電工程研究所 === 90 === A new internal magnetic-abrasive machining process of the 6061-T6 aluminum alloy rectangular tube is developed and investigated. In this study, a new finishing apparatus and auxiliary fixtures are designed and developed to simulate the internal finishing process, the magnetic abrasive particle that the finishing ability abrasive grains (Al2O3) are sintered with a ferromagnetic substance (iron powder) by hot pressed, and, the working parameters and their finishing performances are investigated and reported.
The Taguchi-Method is adopted for the experimental plan, magnetic field strength, quantity of magnetic abrasives, particle size of magnetic abrasives, rotating speed of magnetic pole, feed rate, vibration frequency, vibration amplitude and the coolant are to be used as the control parameters, internal surface finishing performances, such as the stock removal, the polishing efficiency, and the surface roughness, are studied and verified experimentally.
In the present case, by applying the optimal working conditions, a 19.33mg stock removing and 1.91mg/min optimal polishing efficiency were found, and the surface roughness was improved from Ra 0.52mm、Rz(DIN) 2.8mm to Ra 0.09mm、Rz(DIN) 0.66mm.
In this paper, the effects of some major parameters on the surface finishing performances are also clarified experimentally.
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