A hybrid cutting technology using plasma and end mill for decommissioning of nuclear facilities
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A hybrid cutting using both plasma and end mill was developed for safe and efficient dismantling ofnuclear facilities. In this cutting method, a moving arc plasma heats up the workpiece before milling. Thermally softened part of the workpiece is then removed quickly and deeply with an end mill. For thecutting experiments, a three-axis numerical control (NC) milling machine was combined with acommercialized arc plasma torch and used to cut 25 mm thick stainless steel plates. Experimental resultsrevealed that pre-heating by arc plasmas can improve the cutting volume per unit time higher than 40%by reducing the cutting load and increasing the cuttable depth when using an end mill without cuttingfluids. These advantages of a hybrid cutting process are expected to contribute to quick and safe segmentationsof metal structures with radioactively contaminated inner surfaces.
Abstract
A hybrid cutting using both plasma and end mill was developed for safe and efficient dismantling ofnuclear facilities. In this cutting method, a moving arc plasma heats up the workpiece before milling. Thermally softened part of the workpiece is then removed quickly and deeply with an end mill. For thecutting experiments, a three-axis numerical control (NC) milling machine was combined with acommercialized arc plasma torch and used to cut 25 mm thick stainless steel plates. Experimental resultsrevealed that pre-heating by arc plasmas can improve the cutting volume per unit time higher than 40%by reducing the cutting load and increasing the cuttable depth when using an end mill without cuttingfluids. These advantages of a hybrid cutting process are expected to contribute to quick and safe segmentationsof metal structures with radioactively contaminated inner surfaces.
참고문헌 (19)
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