ADDITIVE MANUFACTURING METHOD
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United States of America Patent
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Jul 12, 2016
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Jul 12, 2016
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Abstract
A method for making an article is described that includes generating a digital model of the article that comprises an internal cavity. The digital model is inputted into an additive manufacturing apparatus or system comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a metal powder, which fuses the powder to form incremental portions of the metal powder according to the digital model to form the article with the internal cavity. Abrasive magnetic particles are disposed in the internal cavity, and a magnetic field is applied to the magnetic particles in the internal cavity. Repeated relative movement is imparted between the magnetic field and the article to hone a fused metal powder surface of the internal cavity.
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